Expand tabs into 8 spaces in s7 source code

This makes the code correctly aligned in any editors

1 files changed, 30165 insertions, 30165 deletions

diff --git a/sources/s7/s7.c b/sources/s7/s7.c
index a13d857..f432698 100644
--- a/sources/s7/s7.c
+++ b/sources/s7/s7.c
@@ -550,7 +550,7 @@ typedef block_t vdims_t;
 
 
 typedef enum {TOKEN_EOF, TOKEN_LEFT_PAREN, TOKEN_RIGHT_PAREN, TOKEN_DOT, TOKEN_ATOM, TOKEN_QUOTE, TOKEN_DOUBLE_QUOTE, TOKEN_BACK_QUOTE,
-	      TOKEN_COMMA, TOKEN_AT_MARK, TOKEN_SHARP_CONST, TOKEN_VECTOR, TOKEN_BYTE_VECTOR, TOKEN_INT_VECTOR, TOKEN_FLOAT_VECTOR} token_t;
+              TOKEN_COMMA, TOKEN_AT_MARK, TOKEN_SHARP_CONST, TOKEN_VECTOR, TOKEN_BYTE_VECTOR, TOKEN_INT_VECTOR, TOKEN_FLOAT_VECTOR} token_t;
 
 typedef enum {NO_ARTICLE, INDEFINITE_ARTICLE} article_t;
 typedef enum {DWIND_INIT, DWIND_BODY, DWIND_FINISH} dwind_t;
@@ -587,11 +587,11 @@ typedef struct {
 } port_t;
 
 typedef enum {o_d_v, o_d_vd, o_d_vdd, o_d_vid, o_d_id, o_d_7pi, o_d_7pii, o_d_7piid, o_d_7piii, o_d_7piiid,
-	      o_d_ip, o_d_pd, o_d_7pid, o_d, o_d_d, o_d_dd, o_d_7dd, o_d_ddd, o_d_dddd,
-	      o_i_i, o_i_7i, o_i_ii, o_i_7ii, o_i_iii, o_i_7pi, o_i_7pii, o_i_7piii, o_d_p,
-	      o_b_p, o_b_7p, o_b_pp, o_b_7pp, o_b_pp_unchecked, o_b_pi, o_b_ii, o_b_7ii, o_b_dd,
-	      o_p, o_p_p, o_p_ii, o_p_d, o_p_dd, o_i_7d, o_i_7p, o_d_7d, o_p_pp, o_p_ppp, o_p_pi, o_p_pi_unchecked,
-	      o_p_ppi, o_p_i, o_p_pii, o_p_pip, o_p_pip_unchecked, o_p_piip, o_b_i, o_b_d} opt_func_t;
+              o_d_ip, o_d_pd, o_d_7pid, o_d, o_d_d, o_d_dd, o_d_7dd, o_d_ddd, o_d_dddd,
+              o_i_i, o_i_7i, o_i_ii, o_i_7ii, o_i_iii, o_i_7pi, o_i_7pii, o_i_7piii, o_d_p,
+              o_b_p, o_b_7p, o_b_pp, o_b_7pp, o_b_pp_unchecked, o_b_pi, o_b_ii, o_b_7ii, o_b_dd,
+              o_p, o_p_p, o_p_ii, o_p_d, o_p_dd, o_i_7d, o_i_7p, o_d_7d, o_p_pp, o_p_ppp, o_p_pi, o_p_pi_unchecked,
+              o_p_ppi, o_p_i, o_p_pii, o_p_pip, o_p_pip_unchecked, o_p_piip, o_b_i, o_b_d} opt_func_t;
 
 typedef struct opt_funcs_t {
   opt_func_t typ;
@@ -799,13 +799,13 @@ typedef struct s7_cell {
       s7_double real_value;
 
       struct {                    /* ratios */
-	s7_int numerator;
-	s7_int denominator;
+        s7_int numerator;
+        s7_int denominator;
       } fraction_value;
 
       struct {                    /* complex numbers */
-	s7_double rl;
-	s7_double im;
+        s7_double rl;
+        s7_double im;
       } complex_value;
 
 #if WITH_GMP
@@ -843,16 +843,16 @@ typedef struct s7_cell {
     struct {                      /* vectors */
       s7_int length;
       union {
-	s7_pointer *objects;
-	s7_int *ints;
-	s7_double *floats;
-	uint8_t *bytes;
+        s7_pointer *objects;
+        s7_int *ints;
+        s7_double *floats;
+        uint8_t *bytes;
       } elements;
       block_t *block;
       s7_pointer (*vget)(s7_scheme *sc, s7_pointer vec, s7_int loc);
       union {
-	s7_pointer (*vset)(s7_scheme *sc, s7_pointer vec, s7_int loc, s7_pointer val);
-	s7_pointer fset;
+        s7_pointer (*vset)(s7_scheme *sc, s7_pointer vec, s7_int loc, s7_pointer val);
+        s7_pointer fset;
       } setv;
     } vector;
 
@@ -874,13 +874,13 @@ typedef struct s7_cell {
     struct {                        /* iterators */
       s7_pointer obj, cur;
       union {
-	s7_int loc;
-	s7_pointer lcur;
+        s7_int loc;
+        s7_pointer lcur;
       } lc;
       union {
-	s7_int len;
-	s7_pointer slow;
-	hash_entry_t *hcur;
+        s7_int len;
+        s7_pointer slow;
+        hash_entry_t *hcur;
       } lw;
       s7_pointer (*next)(s7_scheme *sc, s7_pointer iterator);
     } iter;
@@ -895,13 +895,13 @@ typedef struct s7_cell {
       s7_pointer car, cdr, opt1;
       union
       {
-	s7_pointer opt2;
-	s7_int n;
+        s7_pointer opt2;
+        s7_int n;
       } o2;
       union {
-	s7_pointer opt3;
-	s7_int n;
-	uint8_t opt_type;
+        s7_pointer opt3;
+        s7_int n;
+        uint8_t opt_type;
       } o3;
     } cons;
 
@@ -947,14 +947,14 @@ typedef struct s7_cell {
       s7_pointer slots, nxt;
       int64_t id;                  /* id of rootlet is -1 */
       union {
-	struct {
-	  s7_pointer function;     /* *function* (symbol) if this is a funclet */
-	  uint32_t line, file;     /* *function* location if it is known */
-	} efnc;
-	struct {
-	  s7_pointer dox1, dox2;   /* do loop variables */
-	} dox;
-	s7_int key;                /* sc->baffle_ctr type */
+        struct {
+          s7_pointer function;     /* *function* (symbol) if this is a funclet */
+          uint32_t line, file;     /* *function* location if it is known */
+        } efnc;
+        struct {
+          s7_pointer dox1, dox2;   /* do loop variables */
+        } dox;
+        s7_int key;                /* sc->baffle_ctr type */
       } edat;
     } envr;
 
@@ -1459,14 +1459,14 @@ static FILE *old_fopen(const char *pathname, const char *mode) {return(fopen(pat
 static size_t local_fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream)
 {
   error_nr(cur_sc, cur_sc->io_error_symbol,
-	   set_elist_1(cur_sc, wrap_string(cur_sc, "writing a file is not allowed in this version of s7", 51)));
+           set_elist_1(cur_sc, wrap_string(cur_sc, "writing a file is not allowed in this version of s7", 51)));
 }
 
 static FILE *local_fopen(const char *pathname, const char *mode)
 {
   if ((mode[0] == 'w') || (mode[0] == 'a'))
     error_nr(cur_sc, cur_sc->io_error_symbol,
-	     set_elist_1(cur_sc, wrap_string(cur_sc, "opening a file is not allowed in this version of s7", 51)));
+             set_elist_1(cur_sc, wrap_string(cur_sc, "opening a file is not allowed in this version of s7", 51)));
   return(old_fopen(pathname, mode));
 }
 #endif
@@ -1584,10 +1584,10 @@ static inline void liberate(s7_scheme *sc, block_t *p)
   else
     {
       if (block_data(p))
-	{
-	  free(block_data(p));
-	  block_data(p) = NULL;
-	}
+        {
+          free(block_data(p));
+          block_data(p) = NULL;
+        }
       block_next(p) = (struct block_t *)sc->block_lists[BLOCK_LIST];
       sc->block_lists[BLOCK_LIST] = p;
     }
@@ -1636,11 +1636,11 @@ static inline char *permalloc(s7_scheme *sc, size_t len)
   if (next_k > ALLOC_STRING_SIZE)
     {
       if (len >= ALLOC_MAX_STRING)
-	{
-	  result = (char *)Malloc(len);
-	  add_saved_pointer(sc, result);
-	  return(result);
-	}
+        {
+          result = (char *)Malloc(len);
+          add_saved_pointer(sc, result);
+          return(result);
+        }
       sc->alloc_string_cells = (char *)Malloc(ALLOC_STRING_SIZE); /* get a new block */
       add_saved_pointer(sc, sc->alloc_string_cells);
       sc->alloc_string_k = 0;
@@ -1658,37 +1658,37 @@ static Inline block_t *inline_mallocate(s7_scheme *sc, size_t bytes)
     {
       int32_t index;
       if (bytes <= 8) /* presetting a version of intlen_bits with 3's gave only a small speed-up */
-	index = 3;
+        index = 3;
       else
-	{
-	  if (bytes <= 256)
-	    index = intlen_bits[bytes - 1];
-	  else index = (bytes <= 65536) ? (8 + intlen_bits[(bytes - 1) >> 8]) : TOP_BLOCK_LIST;   /* expansion to (1 << 17) made no difference */
-	}
+        {
+          if (bytes <= 256)
+            index = intlen_bits[bytes - 1];
+          else index = (bytes <= 65536) ? (8 + intlen_bits[(bytes - 1) >> 8]) : TOP_BLOCK_LIST;   /* expansion to (1 << 17) made no difference */
+        }
       p = sc->block_lists[index];
       if (p)
-	sc->block_lists[index] = (block_t *)block_next(p);
+        sc->block_lists[index] = (block_t *)block_next(p);
       else
-	{
-	  if (index < (TOP_BLOCK_LIST - 1))
-	    {
-	      p = sc->block_lists[index + 1];
-	      if (p)
-		{
-		  /* we are "borrowing" a block from the next larger bin -- this saves space but costs a bit of time.
-		   *   in a tauto run repeating every call 1000 times, the old form ends up at 129M and 31.1 secs,
-		   *   whereas the borrowing form ends at 116M and 31.5 secs, but most of my tests show a slight
-		   *   speed-up, probably because grabbing a block here is faster than making a new one.
-		   *   Worst case is tlet: 8 slower in callgrind.
-		   */
-		  sc->block_lists[index + 1] = (block_t *)block_next(p);
-		  block_set_size(p, bytes);
-		  return(p);
-		}}
-	  p = mallocate_block(sc);
-	  block_data(p) = (index < TOP_BLOCK_LIST) ? (void *)permalloc(sc, (size_t)(1 << index)) : Malloc(bytes);
-	  block_set_index(p, index);
-	}}
+        {
+          if (index < (TOP_BLOCK_LIST - 1))
+            {
+              p = sc->block_lists[index + 1];
+              if (p)
+                {
+                  /* we are "borrowing" a block from the next larger bin -- this saves space but costs a bit of time.
+                   *   in a tauto run repeating every call 1000 times, the old form ends up at 129M and 31.1 secs,
+                   *   whereas the borrowing form ends at 116M and 31.5 secs, but most of my tests show a slight
+                   *   speed-up, probably because grabbing a block here is faster than making a new one.
+                   *   Worst case is tlet: 8 slower in callgrind.
+                   */
+                  sc->block_lists[index + 1] = (block_t *)block_next(p);
+                  block_set_size(p, bytes);
+                  return(p);
+                }}
+          p = mallocate_block(sc);
+          block_data(p) = (index < TOP_BLOCK_LIST) ? (void *)permalloc(sc, (size_t)(1 << index)) : Malloc(bytes);
+          block_set_index(p, index);
+        }}
   else p = mallocate_block(sc);
   block_set_size(p, bytes);
   return(p);
@@ -1702,9 +1702,9 @@ static block_t *callocate(s7_scheme *sc, size_t bytes)
   if ((block_data(p)) && (block_index(p) != BLOCK_LIST))
     {
       if ((bytes & (~0x3f)) > 0)
-	memclr64((void *)block_data(p), bytes & (~0x3f));
+        memclr64((void *)block_data(p), bytes & (~0x3f));
       if ((bytes & 0x3f) > 0)
-	memclr((void *)((uint8_t *)block_data(p) + (bytes & (~0x3f))), bytes & 0x3f);
+        memclr((void *)((uint8_t *)block_data(p) + (bytes & (~0x3f))), bytes & 0x3f);
     }
   return(p);
 }
@@ -3222,7 +3222,7 @@ static s7_pointer slot_expression(s7_pointer p)    \
 #define pair_set_syntax_op(p, X)       do {set_optimize_op(p, X); set_syntactic_pair(p);} while (0)
 #define symbol_syntax_op_checked(p)    ((is_syntactic_pair(p)) ? optimize_op(p) : symbol_syntax_op(car(p)))
 #define symbol_syntax_op(p)            syntax_opcode(global_value(p))
-#define is_syntax_or_qq(p)	       ((is_syntax(p)) || ((p) == sc->quasiquote_function)) /* qq is from s7_define_macro -> T_C_MACRO */
+#define is_syntax_or_qq(p)             ((is_syntax(p)) || ((p) == sc->quasiquote_function)) /* qq is from s7_define_macro -> T_C_MACRO */
 
 #define let_id(p)                      (T_Let(p))->object.envr.id
 #define let_set_id(p, Id)              (T_Let(p))->object.envr.id = Id
@@ -3681,13 +3681,13 @@ static void set_type_1(s7_pointer p, uint64_t f, const char *func, int32_t line)
       fprintf(stderr, "%d: set invalid type, %p type to %" PRIx64 "\n", __LINE__, p, (int64_t)(f));
     else
       {
-	if (((full_type(p) & T_IMMUTABLE) != 0) && ((full_type(p) != (uint64_t)(f))))
-	  {
-	    fprintf(stderr, "%s[%d]: set immutable %p type %d to %" ld64 "\n", __func__, __LINE__, p, unchecked_type(p), (int64_t)(f));
-	    abort();
-	  }
-	if (((full_type(p) & T_UNHEAP) != 0) && (((f) & T_UNHEAP) == 0))
-	  fprintf(stderr, "%s[%d]: clearing unheap in set type!\n", __func__, __LINE__);
+        if (((full_type(p) & T_IMMUTABLE) != 0) && ((full_type(p) != (uint64_t)(f))))
+          {
+            fprintf(stderr, "%s[%d]: set immutable %p type %d to %" ld64 "\n", __func__, __LINE__, p, unchecked_type(p), (int64_t)(f));
+            abort();
+          }
+        if (((full_type(p) & T_UNHEAP) != 0) && (((f) & T_UNHEAP) == 0))
+          fprintf(stderr, "%s[%d]: clearing unheap in set type!\n", __func__, __LINE__);
       }
   full_type(p) = f;
 }
@@ -3879,11 +3879,11 @@ static void try_to_call_gc(s7_scheme *sc);
  *   does not return it to the free list: a memory leak.
  */
 #if (!S7_DEBUGGING)
-#define new_cell(Sc, Obj, Type)			\
-  do {						\
+#define new_cell(Sc, Obj, Type)                        \
+  do {                                                \
     if (Sc->free_heap_top <= Sc->free_heap_trigger) try_to_call_gc(Sc); \
     Obj = (*(--(Sc->free_heap_top))); \
-    set_full_type(Obj, Type);	      \
+    set_full_type(Obj, Type);              \
     } while (0)
 
 #define new_cell_no_check(Sc, Obj, Type) do {Obj = (*(--(Sc->free_heap_top))); set_full_type(Obj, Type);} while (0)
@@ -3892,20 +3892,20 @@ static void try_to_call_gc(s7_scheme *sc);
    */
 #else
 
-#define new_cell(Sc, Obj, Type)						\
-  do {									\
+#define new_cell(Sc, Obj, Type)                                                \
+  do {                                                                        \
     if (Sc->free_heap_top <= Sc->free_heap_trigger) try_to_call_gc(Sc); \
-    Obj = (*(--(Sc->free_heap_top)));					\
-    Obj->debugger_bits = 0; Obj->gc_func = NULL; Obj->gc_line = 0;	\
-    set_full_type(Obj, Type);						\
+    Obj = (*(--(Sc->free_heap_top)));                                        \
+    Obj->debugger_bits = 0; Obj->gc_func = NULL; Obj->gc_line = 0;        \
+    set_full_type(Obj, Type);                                                \
   } while (0)
 
-#define new_cell_no_check(Sc, Obj, Type)				\
-  do {									\
-    Obj = (*(--(Sc->free_heap_top)));					\
+#define new_cell_no_check(Sc, Obj, Type)                                \
+  do {                                                                        \
+    Obj = (*(--(Sc->free_heap_top)));                                        \
     if (Sc->free_heap_top < Sc->free_heap) {fprintf(stderr, "%s[%d]: free heap exhausted\n", __func__, __LINE__); abort();}\
-    Obj->debugger_bits = 0; Obj->gc_func = NULL; Obj->gc_line = 0;	\
-    set_full_type(Obj, Type);						\
+    Obj->debugger_bits = 0; Obj->gc_func = NULL; Obj->gc_line = 0;        \
+    set_full_type(Obj, Type);                                                \
     } while (0)
 #endif
 
@@ -3929,7 +3929,7 @@ static void try_to_call_gc(s7_scheme *sc);
 #endif
 #define make_complex(Sc, R, I) \
   ({ s7_double _im_; _im_ = (I); ((_im_ == 0.0) ? make_real(Sc, R) : \
-				  ({ s7_pointer _C_; new_cell(Sc, _C_, T_COMPLEX); set_real_part(_C_, R); set_imag_part(_C_, _im_); _C_;}) ); })
+                                  ({ s7_pointer _C_; new_cell(Sc, _C_, T_COMPLEX); set_real_part(_C_, R); set_imag_part(_C_, _im_); _C_;}) ); })
 
 #define real_to_double(Sc, X, Caller) ({ s7_pointer _x_; _x_ = (X); ((type(_x_) == T_REAL) ? real(_x_) : s7_number_to_real_with_caller(Sc, _x_, Caller)); })
 #define rational_to_double(Sc, X)     ({ s7_pointer _x_; _x_ = (X); ((type(_x_) == T_INTEGER) ? (s7_double)integer(_x_) : fraction(_x_)); })
@@ -4006,7 +4006,7 @@ static void local_memset(void *s, uint8_t val, size_t n)
       int64_t ival = val | (val << 8) | (val << 16) | (((uint64_t)val) << 24); /* uint64_t casts make gcc/clang/fsanitize happy */
       ival = (((uint64_t)ival) << 32) | ival;
       if ((n8 & 0x3) == 0)
-	while (n8 > 0) {LOOP_4(*s1++ = ival); n8 -= 4;}
+        while (n8 > 0) {LOOP_4(*s1++ = ival); n8 -= 4;}
       else do {*s1++ = ival;} while (--n8 > 0);
       n &= 7;
       s2 = (uint8_t *)s1;
@@ -4588,24 +4588,24 @@ static const char* op_names[NUM_OPS] =
 static bool is_h_optimized(s7_pointer p)
 {
   return((is_optimized(p)) &&
-	 (op_has_hop(p)) &&
-	 (optimize_op(p) < FIRST_UNHOPPABLE_OP) &&  /* was OP_S? */
-	 (optimize_op(p) > OP_GC_PROTECT));
+         (op_has_hop(p)) &&
+         (optimize_op(p) < FIRST_UNHOPPABLE_OP) &&  /* was OP_S? */
+         (optimize_op(p) > OP_GC_PROTECT));
 }
 
 /* if this changes, remember to change lint.scm */
 typedef enum {SL_NO_FIELD=0, SL_STACK_TOP, SL_STACK_SIZE, SL_STACKTRACE_DEFAULTS, SL_HEAP_SIZE, SL_FREE_HEAP_SIZE,
               SL_GC_FREED, SL_GC_PROTECTED_OBJECTS, SL_GC_TOTAL_FREED, SL_GC_INFO, SL_FILE_NAMES, SL_FILENAMES, SL_ROOTLET_SIZE, SL_C_TYPES,
               SL_SAFETY, SL_UNDEFINED_IDENTIFIER_WARNINGS, SL_UNDEFINED_CONSTANT_WARNINGS, SL_GC_STATS, SL_MAX_HEAP_SIZE,
-	      SL_MAX_PORT_DATA_SIZE, SL_MAX_STACK_SIZE, SL_CPU_TIME, SL_CATCHES, SL_STACK, SL_MAJOR_VERSION, SL_MINOR_VERSION,
-	      SL_MAX_STRING_LENGTH, SL_MAX_FORMAT_LENGTH, SL_MAX_LIST_LENGTH, SL_MAX_VECTOR_LENGTH, SL_MAX_VECTOR_DIMENSIONS,
-	      SL_DEFAULT_HASH_TABLE_LENGTH, SL_INITIAL_STRING_PORT_LENGTH, SL_DEFAULT_RATIONALIZE_ERROR,
-	      SL_DEFAULT_RANDOM_STATE, SL_EQUIVALENT_FLOAT_EPSILON, SL_HASH_TABLE_FLOAT_EPSILON, SL_PRINT_LENGTH,
-	      SL_BIGNUM_PRECISION, SL_MEMORY_USAGE, SL_FLOAT_FORMAT_PRECISION, SL_HISTORY, SL_HISTORY_ENABLED,
-	      SL_HISTORY_SIZE, SL_PROFILE, SL_PROFILE_INFO, SL_PROFILE_PREFIX, SL_AUTOLOADING, SL_ACCEPT_ALL_KEYWORD_ARGUMENTS,
-	      SL_MUFFLE_WARNINGS, SL_MOST_POSITIVE_FIXNUM, SL_MOST_NEGATIVE_FIXNUM, SL_OUTPUT_FILE_PORT_DATA_SIZE, SL_DEBUG, SL_VERSION,
-	      SL_GC_TEMPS_SIZE, SL_GC_RESIZE_HEAP_FRACTION, SL_GC_RESIZE_HEAP_BY_4_FRACTION, SL_OPENLETS, SL_EXPANSIONS,
-	      SL_NUMBER_SEPARATOR, SL_NUM_FIELDS} s7_starlet_t;
+              SL_MAX_PORT_DATA_SIZE, SL_MAX_STACK_SIZE, SL_CPU_TIME, SL_CATCHES, SL_STACK, SL_MAJOR_VERSION, SL_MINOR_VERSION,
+              SL_MAX_STRING_LENGTH, SL_MAX_FORMAT_LENGTH, SL_MAX_LIST_LENGTH, SL_MAX_VECTOR_LENGTH, SL_MAX_VECTOR_DIMENSIONS,
+              SL_DEFAULT_HASH_TABLE_LENGTH, SL_INITIAL_STRING_PORT_LENGTH, SL_DEFAULT_RATIONALIZE_ERROR,
+              SL_DEFAULT_RANDOM_STATE, SL_EQUIVALENT_FLOAT_EPSILON, SL_HASH_TABLE_FLOAT_EPSILON, SL_PRINT_LENGTH,
+              SL_BIGNUM_PRECISION, SL_MEMORY_USAGE, SL_FLOAT_FORMAT_PRECISION, SL_HISTORY, SL_HISTORY_ENABLED,
+              SL_HISTORY_SIZE, SL_PROFILE, SL_PROFILE_INFO, SL_PROFILE_PREFIX, SL_AUTOLOADING, SL_ACCEPT_ALL_KEYWORD_ARGUMENTS,
+              SL_MUFFLE_WARNINGS, SL_MOST_POSITIVE_FIXNUM, SL_MOST_NEGATIVE_FIXNUM, SL_OUTPUT_FILE_PORT_DATA_SIZE, SL_DEBUG, SL_VERSION,
+              SL_GC_TEMPS_SIZE, SL_GC_RESIZE_HEAP_FRACTION, SL_GC_RESIZE_HEAP_BY_4_FRACTION, SL_OPENLETS, SL_EXPANSIONS,
+              SL_NUMBER_SEPARATOR, SL_NUM_FIELDS} s7_starlet_t;
 
 static const char *s7_starlet_names[SL_NUM_FIELDS] =
   {"no-field", "stack-top", "stack-size", "stacktrace-defaults", "heap-size", "free-heap-size",
@@ -4668,16 +4668,16 @@ bool s7_is_valid(s7_scheme *sc, s7_pointer arg)
       old_segv = signal(SIGSEGV, segv);
 #endif
       if ((unchecked_type(arg) > T_FREE) &&
-	  (unchecked_type(arg) < NUM_TYPES))
-	{
-	  if (!in_heap(arg))
-	    result = true;
-	  else
-	    {
-	      int64_t loc = heap_location(sc, arg);
-	      if ((loc >= 0) && (loc < sc->heap_size))
-		result = (sc->heap[loc] == arg);
-	    }}
+          (unchecked_type(arg) < NUM_TYPES))
+        {
+          if (!in_heap(arg))
+            result = true;
+          else
+            {
+              int64_t loc = heap_location(sc, arg);
+              if ((loc >= 0) && (loc < sc->heap_size))
+                result = (sc->heap[loc] == arg);
+            }}
 #if TRAP_SEGFAULT
       signal(SIGSEGV, old_segv);
     }
@@ -4687,12 +4687,12 @@ bool s7_is_valid(s7_scheme *sc, s7_pointer arg)
   return(result);
 }
 
-#define safe_print(Code)	   \
-  do {				   \
+#define safe_print(Code)           \
+  do {                                   \
     bool old_open = sc->has_openlets, old_stop = sc->stop_at_error;  \
     sc->has_openlets = false;      \
-    sc->stop_at_error = false;	   \
-    Code;			   \
+    sc->stop_at_error = false;           \
+    Code;                           \
     sc->stop_at_error = old_stop;  \
     sc->has_openlets = old_open;   \
   } while (0)
@@ -4709,7 +4709,7 @@ void s7_show_history(s7_scheme *sc)
       s7_pointer p = cdr(sc->cur_code);
       fprintf(stderr, "history:\n");
       for (int32_t i = 0; i < size; i++, p = cdr(p)) /* stepper "i" is not redundant */
-	safe_print(fprintf(stderr, "%d: %s\n", i, display_truncated(car(p))));
+        safe_print(fprintf(stderr, "%d: %s\n", i, display_truncated(car(p))));
       fprintf(stderr, "\n");
     }
 #else
@@ -4728,196 +4728,196 @@ static char *describe_type_bits(s7_scheme *sc, s7_pointer obj)
   char str[900];
 
   str[0] = '\0';
-  catstrs(str, 900,	  /* if debugging, all of these bits are being watched, so we need to access them directly */
-	  /* bit 8 (the first 8 bits (after the 8 type bits) are easy...) */
-	  ((full_typ & T_MULTIFORM) != 0) ?      ((is_any_closure(obj)) ?
-						  (((full_typ & T_ONE_FORM) != 0) ? " closure-one-form-has-fx" : " closure-multiform") :
-						  " ?0?") : "",
-	  /* bit 9 */
-	  ((full_typ & T_SYNTACTIC) != 0) ?      (((is_pair(obj)) || (is_syntax(obj)) || (is_normal_symbol(obj))) ?
-						  " syntactic" :
-						  " ?1?") : "",
-	  /* bit 10 */
-	  ((full_typ & T_SIMPLE_ARG_DEFAULTS) != 0) ? ((is_pair(obj)) ? " simple-args|in-use" :
-						       ((is_any_closure(obj)) ? " closure-one-form" :
-							" ?2?")) : "",
-	  /* bit 11 */
-	  ((full_typ & T_OPTIMIZED) != 0) ?      ((is_c_function(obj)) ? " scope-safe" :
-						  ((is_pair(obj)) ? " optimized" :
-						   " ?3?")) : "",
-	  /* bit 12 */
-	  ((full_typ & T_SAFE_CLOSURE) != 0) ?   (((has_closure_let(obj)) || (is_pair(obj))) ? " safe-closure" : " ?4?") : "",
-	  /* bit 13 */
-	  ((full_typ & T_DONT_EVAL_ARGS) != 0) ? (((is_any_macro(obj)) || (is_syntax(obj))) ? " dont-eval-args" : " ?5?") : "",
-	  /* bit 14 */
-	  ((full_typ & T_EXPANSION) != 0) ?      (((is_normal_symbol(obj)) || (is_either_macro(obj))) ? " expansion" : " ?6?") : "",
-	  /* bit 15 */
-	  ((full_typ & T_MULTIPLE_VALUE) != 0) ? ((is_symbol(obj)) ? " matched" :
-						  ((is_pair(obj)) ? " values|matched" :
-						   " ?7?")) : "",
-	  /* bit 16 */
-	  ((full_typ & T_GLOBAL) != 0) ?         ((is_pair(obj)) ? " unsafe-do" :
-						  (((is_symbol(obj)) || (is_syntax(obj))) ? " global" :
-						   ((is_let(obj)) ? " dox_slot1" :
-						    " ?8?"))) : "",
-	  /* bit 17 */
-	  ((full_typ & T_COLLECTED) != 0) ?      " collected" : "",
-	  /* bit 18 */
-	  ((full_typ & T_LOCATION) != 0) ?       ((is_pair(obj)) ? " line-number" :
-						  ((is_input_port(obj)) ? " loader-port" :
-						   ((is_let(obj)) ? " with-let" :
-						    ((is_any_procedure(obj)) ? " simple-defaults" :
-						     ((is_slot(obj)) ? " has-setter" :
-						      " ?10?"))))) : "",
-	  /* bit 19 */
-	  ((full_typ & T_SHARED) != 0) ?         ((is_sequence(obj)) ? " shared" : " ?11?") : "",
-	  /* bit 20 */
-	  ((full_typ & T_LOCAL) != 0) ?          ((is_normal_symbol(obj)) ? " local" :
-						  ((is_pair(obj)) ? " high-c" :
-						   " ?12?")) : "",
-	  /* bit 21 */
-	  ((full_typ & T_SAFE_PROCEDURE) != 0) ? ((is_applicable(obj)) ? " safe-procedure" : " ?13?") : "",
-	  /* bit 22 */
-	  ((full_typ & T_CHECKED) != 0) ?        (((is_pair(obj)) || (is_slot(obj))) ? " checked" :
-						  ((is_symbol(obj)) ? " all-integer" :
-						   " ?14?")) : "",
-	  /* bit 23 */
-	  ((full_typ & T_UNSAFE) != 0) ?         ((is_symbol(obj)) ? " clean-symbol" :
-						  ((is_slot(obj)) ? " has-stepper" :
-						   ((is_pair(obj)) ? " unsafely-opt|no-float-opt" :
-						    ((is_let(obj)) ? " dox-slot2" :
-						     " ?15?")))) : "",
-	  /* bit 24 */
-	  ((full_typ & T_IMMUTABLE) != 0) ?      " immutable" : "",
-	  /* bit 25 */
-	  ((full_typ & T_SETTER) != 0) ?         ((is_normal_symbol(obj)) ? " setter" :
-						  ((is_pair(obj)) ? " allow-other-keys|no-int-opt" :
-						   ((is_slot(obj)) ? " has-expression" :
-						    ((is_c_function_star(obj)) ? " allow-other-keys" :
-						     ((is_let(obj)) ? " let-removed-from-heap" :
-						      " ?17?"))))) : "",
-	  /* bit 26 */
-	  ((full_typ & T_MUTABLE) != 0) ?        ((is_number(obj)) ? " mutable" :
-						  ((is_symbol(obj)) ? " has-keyword" :
-						   ((is_let(obj)) ? " ref-fallback" :
-						    ((is_iterator(obj)) ? " mark-sequence" :
-						     ((is_slot(obj)) ? " step-end" :
-						      ((is_pair(obj)) ? " no-opt" :
-						       " ?18?")))))) : "",
-	  /* bit 27 */
-	  ((full_typ & T_SAFE_STEPPER) != 0) ?   ((is_let(obj)) ? " set-fallback" :
-						  ((is_slot(obj)) ? " safe-stepper" :
-						   ((is_c_function(obj)) ? " maybe-safe" :
-						    ((is_number(obj)) ? " print-name" :
-						     ((is_pair(obj)) ? " direct-opt" :
-						      ((is_hash_table(obj)) ? " weak-hash" :
-						       ((is_any_macro(obj)) ? " pair-macro-set" :
-							((is_symbol(obj)) ? " all-float" :
-							 " ?19?")))))))) : "",
-	  /* bit 28, for c_function case see sc->apply */
-	  ((full_typ & T_COPY_ARGS) != 0) ?      (((is_pair(obj)) || (is_any_macro(obj)) || (is_syntax(obj)) ||
-						   (is_any_closure(obj)) || (is_c_function(obj))) ? " copy-args" :
-						  " ?20?") : "",
-	  /* bit 29 */
-	  ((full_typ & T_GENSYM) != 0) ?         ((is_let(obj)) ? " funclet" :
-						  ((is_normal_symbol(obj)) ? " gensym" :
-						   ((is_string(obj)) ? " documented-symbol" :
-						    ((is_hash_table(obj)) ? " hash-chosen" :
-						     ((is_pair(obj)) ? " fx-treed" :
-						      ((is_any_vector(obj)) ? " subvector" :
-						       ((is_slot(obj)) ? " has-pending-value" :
-							((is_any_closure(obj)) ? " unknopt" :
-							 " ?21?")))))))) : "",
-	  /* bit 30 [pair and symbol free here] */
-	  ((full_typ & T_HAS_METHODS) != 0) ?    (((is_let(obj)) || (is_c_object(obj)) || (is_any_closure(obj)) ||
-						   (is_any_macro(obj)) || (is_c_pointer(obj))) ? " has-methods" :
-						  " ?22?") : "",
-	  /* bit 31 */
-	  ((full_typ & T_ITER_OK) != 0) ?        ((is_iterator(obj)) ? " iter-ok" :
-						  ((is_pair(obj)) ? " loop-end-possible" :
-						   ((is_slot(obj)) ? " in-rootlet" :
-						    ((is_c_function(obj)) ? " bool-function" :
-						     ((is_symbol(obj)) ? " symbol-from-symbol" :
-						      " ?23?"))))) : "",
-	  /* bit 24+24 */
-	  ((full_typ & T_FULL_SYMCONS) != 0) ?   ((is_symbol(obj)) ? " possibly-constant" :
-						  ((is_any_procedure(obj)) ? " has-let-arg" :
-						   ((is_hash_table(obj)) ? " has-value-type" :
-						    ((is_pair(obj)) ? " int-optable" :
-						     ((is_let(obj)) ? " unlet" :
-						      ((is_t_vector(obj)) ? " symbol-table" :
-						       " ?24?")))))) : "",
-	  /* bit 25+24 */
-	  ((full_typ & T_FULL_HAS_LET_FILE) != 0) ? ((is_let(obj)) ? " has-let-file" :
-						     ((is_t_vector(obj)) ? " typed-vector" :
-						      ((is_hash_table(obj)) ? " typed-hash-table" :
-						       ((is_c_function(obj)) ? " has-bool-setter" :
-							((is_slot(obj)) ? " rest-slot" :
-							 (((is_pair(obj)) || (is_closure_star(obj))) ? " no-defaults" :
-							  " ?25?")))))) : "",
-	  /* bit 26+24 */
-	  ((full_typ & T_FULL_DEFINER) != 0) ?   ((is_normal_symbol(obj)) ? " definer" :
-						  ((is_pair(obj)) ? " has-fx" :
-						   ((is_slot(obj)) ? " slot-defaults" :
-						    ((is_iterator(obj)) ? " weak-hash-iterator" :
-						     ((is_hash_table(obj)) ? " has-key-type" :
-						      ((is_let(obj)) ? " maclet" :
-						       ((is_c_function(obj)) ? " func-definer" :
-							((is_syntax(obj)) ? " syntax-definer" :
-							 " ?26?")))))))) : "",
-	  /* bit 27+24 */
-	  ((full_typ & T_FULL_BINDER) != 0) ?    ((is_pair(obj)) ? " tree-collected" :
-						  ((is_hash_table(obj)) ? " simple-values" :
-						   ((is_normal_symbol(obj)) ? " binder" :
-						    ((is_c_function(obj)) ? " safe-args" :
-						     ((is_syntax(obj)) ?  " syntax-binder" :
-						      " ?27?"))))) : "",
-	  /* bit 28+24 */
-	  ((full_typ & T_VERY_SAFE_CLOSURE) != 0) ? (((is_pair(obj)) || (is_any_closure(obj))) ? " very-safe-closure" :
-						     ((is_let(obj)) ? " baffle-let" :
-						      " ?28?")) : "",
-	  /* bit 29+24 */
-	  ((full_typ & T_CYCLIC) != 0) ?         (((is_simple_sequence(obj)) || (t_structure_p[type(obj)]) ||
-						   (is_any_closure(obj))) ? " cyclic" : " ?29?") : "",
-	  /* bit 30+24 */
-	  ((full_typ & T_CYCLIC_SET) != 0) ?     (((is_simple_sequence(obj)) || (t_structure_p[type(obj)]) ||
-						   (is_any_closure(obj))) ? " cyclic-set" : " ?30?") : "",
-	  /* bit 31+24 */
-	  ((full_typ & T_KEYWORD) != 0) ?        ((is_symbol(obj)) ? " keyword" :
-						  ((is_pair(obj)) ? " fx-treeable" :
-						   " ?31?")) : "",
-	  /* bit 32+24 */
-	  ((full_typ & T_FULL_SIMPLE_ELEMENTS) != 0) ? ((is_t_vector(obj)) ? " simple-elements" :
-							((is_hash_table(obj)) ? " simple-keys" :
-							 ((is_normal_symbol(obj)) ? " safe-setter" :
-							  ((is_pair(obj)) ? " float-optable" :
-							   ((typ >= T_C_MACRO) ? " function-simple-elements" :
-							    " 32?"))))) : "",
-	  /* bit 33+24 */
-	  ((full_typ & T_FULL_CASE_KEY) != 0) ?  ((is_symbol(obj)) ? " case-key" :
-						  ((is_pair(obj)) ? " opt1-func-listed" :
-						   " ?33?")) : "",
-	  /* bit 34+24 free */
-	  /* bit 35+24 */
-	  ((full_typ & T_FULL_UNKNOPT) != 0) ?    ((is_pair(obj)) ? " unknopt" : " ?35?") : "",
-	  /* bit 36+24 */
-	  ((full_typ & T_FULL_SAFETY_CHECKED) != 0) ? ((is_pair(obj)) ? " safety-checked" : " ?36?") : "",
-	  /* bit 37+24 */
-	  ((full_typ & T_FULL_HAS_FN) != 0) ?    ((is_pair(obj)) ? " has-fn" : " ?37") : "",
-	  /* bit 62 */
-	  ((full_typ & T_UNHEAP) != 0) ?         " unheap" : "",
-	  /* bit 63 */
-	  ((full_typ & T_GC_MARK) != 0) ?        " gc-marked" : "",
-
-	  ((full_typ & UNUSED_BITS) != 0) ?      " unused bits set?" : "",
-	  ((is_symbol(obj)) && (((uint8_t)(symbol_type(obj) & 0xff) >= NUM_TYPES) || ((symbol_type(obj) & ~0xffff) != 0))) ? " bad-symbol-type" : "",
-	  NULL);
+  catstrs(str, 900,          /* if debugging, all of these bits are being watched, so we need to access them directly */
+          /* bit 8 (the first 8 bits (after the 8 type bits) are easy...) */
+          ((full_typ & T_MULTIFORM) != 0) ?      ((is_any_closure(obj)) ?
+                                                  (((full_typ & T_ONE_FORM) != 0) ? " closure-one-form-has-fx" : " closure-multiform") :
+                                                  " ?0?") : "",
+          /* bit 9 */
+          ((full_typ & T_SYNTACTIC) != 0) ?      (((is_pair(obj)) || (is_syntax(obj)) || (is_normal_symbol(obj))) ?
+                                                  " syntactic" :
+                                                  " ?1?") : "",
+          /* bit 10 */
+          ((full_typ & T_SIMPLE_ARG_DEFAULTS) != 0) ? ((is_pair(obj)) ? " simple-args|in-use" :
+                                                       ((is_any_closure(obj)) ? " closure-one-form" :
+                                                        " ?2?")) : "",
+          /* bit 11 */
+          ((full_typ & T_OPTIMIZED) != 0) ?      ((is_c_function(obj)) ? " scope-safe" :
+                                                  ((is_pair(obj)) ? " optimized" :
+                                                   " ?3?")) : "",
+          /* bit 12 */
+          ((full_typ & T_SAFE_CLOSURE) != 0) ?   (((has_closure_let(obj)) || (is_pair(obj))) ? " safe-closure" : " ?4?") : "",
+          /* bit 13 */
+          ((full_typ & T_DONT_EVAL_ARGS) != 0) ? (((is_any_macro(obj)) || (is_syntax(obj))) ? " dont-eval-args" : " ?5?") : "",
+          /* bit 14 */
+          ((full_typ & T_EXPANSION) != 0) ?      (((is_normal_symbol(obj)) || (is_either_macro(obj))) ? " expansion" : " ?6?") : "",
+          /* bit 15 */
+          ((full_typ & T_MULTIPLE_VALUE) != 0) ? ((is_symbol(obj)) ? " matched" :
+                                                  ((is_pair(obj)) ? " values|matched" :
+                                                   " ?7?")) : "",
+          /* bit 16 */
+          ((full_typ & T_GLOBAL) != 0) ?         ((is_pair(obj)) ? " unsafe-do" :
+                                                  (((is_symbol(obj)) || (is_syntax(obj))) ? " global" :
+                                                   ((is_let(obj)) ? " dox_slot1" :
+                                                    " ?8?"))) : "",
+          /* bit 17 */
+          ((full_typ & T_COLLECTED) != 0) ?      " collected" : "",
+          /* bit 18 */
+          ((full_typ & T_LOCATION) != 0) ?       ((is_pair(obj)) ? " line-number" :
+                                                  ((is_input_port(obj)) ? " loader-port" :
+                                                   ((is_let(obj)) ? " with-let" :
+                                                    ((is_any_procedure(obj)) ? " simple-defaults" :
+                                                     ((is_slot(obj)) ? " has-setter" :
+                                                      " ?10?"))))) : "",
+          /* bit 19 */
+          ((full_typ & T_SHARED) != 0) ?         ((is_sequence(obj)) ? " shared" : " ?11?") : "",
+          /* bit 20 */
+          ((full_typ & T_LOCAL) != 0) ?          ((is_normal_symbol(obj)) ? " local" :
+                                                  ((is_pair(obj)) ? " high-c" :
+                                                   " ?12?")) : "",
+          /* bit 21 */
+          ((full_typ & T_SAFE_PROCEDURE) != 0) ? ((is_applicable(obj)) ? " safe-procedure" : " ?13?") : "",
+          /* bit 22 */
+          ((full_typ & T_CHECKED) != 0) ?        (((is_pair(obj)) || (is_slot(obj))) ? " checked" :
+                                                  ((is_symbol(obj)) ? " all-integer" :
+                                                   " ?14?")) : "",
+          /* bit 23 */
+          ((full_typ & T_UNSAFE) != 0) ?         ((is_symbol(obj)) ? " clean-symbol" :
+                                                  ((is_slot(obj)) ? " has-stepper" :
+                                                   ((is_pair(obj)) ? " unsafely-opt|no-float-opt" :
+                                                    ((is_let(obj)) ? " dox-slot2" :
+                                                     " ?15?")))) : "",
+          /* bit 24 */
+          ((full_typ & T_IMMUTABLE) != 0) ?      " immutable" : "",
+          /* bit 25 */
+          ((full_typ & T_SETTER) != 0) ?         ((is_normal_symbol(obj)) ? " setter" :
+                                                  ((is_pair(obj)) ? " allow-other-keys|no-int-opt" :
+                                                   ((is_slot(obj)) ? " has-expression" :
+                                                    ((is_c_function_star(obj)) ? " allow-other-keys" :
+                                                     ((is_let(obj)) ? " let-removed-from-heap" :
+                                                      " ?17?"))))) : "",
+          /* bit 26 */
+          ((full_typ & T_MUTABLE) != 0) ?        ((is_number(obj)) ? " mutable" :
+                                                  ((is_symbol(obj)) ? " has-keyword" :
+                                                   ((is_let(obj)) ? " ref-fallback" :
+                                                    ((is_iterator(obj)) ? " mark-sequence" :
+                                                     ((is_slot(obj)) ? " step-end" :
+                                                      ((is_pair(obj)) ? " no-opt" :
+                                                       " ?18?")))))) : "",
+          /* bit 27 */
+          ((full_typ & T_SAFE_STEPPER) != 0) ?   ((is_let(obj)) ? " set-fallback" :
+                                                  ((is_slot(obj)) ? " safe-stepper" :
+                                                   ((is_c_function(obj)) ? " maybe-safe" :
+                                                    ((is_number(obj)) ? " print-name" :
+                                                     ((is_pair(obj)) ? " direct-opt" :
+                                                      ((is_hash_table(obj)) ? " weak-hash" :
+                                                       ((is_any_macro(obj)) ? " pair-macro-set" :
+                                                        ((is_symbol(obj)) ? " all-float" :
+                                                         " ?19?")))))))) : "",
+          /* bit 28, for c_function case see sc->apply */
+          ((full_typ & T_COPY_ARGS) != 0) ?      (((is_pair(obj)) || (is_any_macro(obj)) || (is_syntax(obj)) ||
+                                                   (is_any_closure(obj)) || (is_c_function(obj))) ? " copy-args" :
+                                                  " ?20?") : "",
+          /* bit 29 */
+          ((full_typ & T_GENSYM) != 0) ?         ((is_let(obj)) ? " funclet" :
+                                                  ((is_normal_symbol(obj)) ? " gensym" :
+                                                   ((is_string(obj)) ? " documented-symbol" :
+                                                    ((is_hash_table(obj)) ? " hash-chosen" :
+                                                     ((is_pair(obj)) ? " fx-treed" :
+                                                      ((is_any_vector(obj)) ? " subvector" :
+                                                       ((is_slot(obj)) ? " has-pending-value" :
+                                                        ((is_any_closure(obj)) ? " unknopt" :
+                                                         " ?21?")))))))) : "",
+          /* bit 30 [pair and symbol free here] */
+          ((full_typ & T_HAS_METHODS) != 0) ?    (((is_let(obj)) || (is_c_object(obj)) || (is_any_closure(obj)) ||
+                                                   (is_any_macro(obj)) || (is_c_pointer(obj))) ? " has-methods" :
+                                                  " ?22?") : "",
+          /* bit 31 */
+          ((full_typ & T_ITER_OK) != 0) ?        ((is_iterator(obj)) ? " iter-ok" :
+                                                  ((is_pair(obj)) ? " loop-end-possible" :
+                                                   ((is_slot(obj)) ? " in-rootlet" :
+                                                    ((is_c_function(obj)) ? " bool-function" :
+                                                     ((is_symbol(obj)) ? " symbol-from-symbol" :
+                                                      " ?23?"))))) : "",
+          /* bit 24+24 */
+          ((full_typ & T_FULL_SYMCONS) != 0) ?   ((is_symbol(obj)) ? " possibly-constant" :
+                                                  ((is_any_procedure(obj)) ? " has-let-arg" :
+                                                   ((is_hash_table(obj)) ? " has-value-type" :
+                                                    ((is_pair(obj)) ? " int-optable" :
+                                                     ((is_let(obj)) ? " unlet" :
+                                                      ((is_t_vector(obj)) ? " symbol-table" :
+                                                       " ?24?")))))) : "",
+          /* bit 25+24 */
+          ((full_typ & T_FULL_HAS_LET_FILE) != 0) ? ((is_let(obj)) ? " has-let-file" :
+                                                     ((is_t_vector(obj)) ? " typed-vector" :
+                                                      ((is_hash_table(obj)) ? " typed-hash-table" :
+                                                       ((is_c_function(obj)) ? " has-bool-setter" :
+                                                        ((is_slot(obj)) ? " rest-slot" :
+                                                         (((is_pair(obj)) || (is_closure_star(obj))) ? " no-defaults" :
+                                                          " ?25?")))))) : "",
+          /* bit 26+24 */
+          ((full_typ & T_FULL_DEFINER) != 0) ?   ((is_normal_symbol(obj)) ? " definer" :
+                                                  ((is_pair(obj)) ? " has-fx" :
+                                                   ((is_slot(obj)) ? " slot-defaults" :
+                                                    ((is_iterator(obj)) ? " weak-hash-iterator" :
+                                                     ((is_hash_table(obj)) ? " has-key-type" :
+                                                      ((is_let(obj)) ? " maclet" :
+                                                       ((is_c_function(obj)) ? " func-definer" :
+                                                        ((is_syntax(obj)) ? " syntax-definer" :
+                                                         " ?26?")))))))) : "",
+          /* bit 27+24 */
+          ((full_typ & T_FULL_BINDER) != 0) ?    ((is_pair(obj)) ? " tree-collected" :
+                                                  ((is_hash_table(obj)) ? " simple-values" :
+                                                   ((is_normal_symbol(obj)) ? " binder" :
+                                                    ((is_c_function(obj)) ? " safe-args" :
+                                                     ((is_syntax(obj)) ?  " syntax-binder" :
+                                                      " ?27?"))))) : "",
+          /* bit 28+24 */
+          ((full_typ & T_VERY_SAFE_CLOSURE) != 0) ? (((is_pair(obj)) || (is_any_closure(obj))) ? " very-safe-closure" :
+                                                     ((is_let(obj)) ? " baffle-let" :
+                                                      " ?28?")) : "",
+          /* bit 29+24 */
+          ((full_typ & T_CYCLIC) != 0) ?         (((is_simple_sequence(obj)) || (t_structure_p[type(obj)]) ||
+                                                   (is_any_closure(obj))) ? " cyclic" : " ?29?") : "",
+          /* bit 30+24 */
+          ((full_typ & T_CYCLIC_SET) != 0) ?     (((is_simple_sequence(obj)) || (t_structure_p[type(obj)]) ||
+                                                   (is_any_closure(obj))) ? " cyclic-set" : " ?30?") : "",
+          /* bit 31+24 */
+          ((full_typ & T_KEYWORD) != 0) ?        ((is_symbol(obj)) ? " keyword" :
+                                                  ((is_pair(obj)) ? " fx-treeable" :
+                                                   " ?31?")) : "",
+          /* bit 32+24 */
+          ((full_typ & T_FULL_SIMPLE_ELEMENTS) != 0) ? ((is_t_vector(obj)) ? " simple-elements" :
+                                                        ((is_hash_table(obj)) ? " simple-keys" :
+                                                         ((is_normal_symbol(obj)) ? " safe-setter" :
+                                                          ((is_pair(obj)) ? " float-optable" :
+                                                           ((typ >= T_C_MACRO) ? " function-simple-elements" :
+                                                            " 32?"))))) : "",
+          /* bit 33+24 */
+          ((full_typ & T_FULL_CASE_KEY) != 0) ?  ((is_symbol(obj)) ? " case-key" :
+                                                  ((is_pair(obj)) ? " opt1-func-listed" :
+                                                   " ?33?")) : "",
+          /* bit 34+24 free */
+          /* bit 35+24 */
+          ((full_typ & T_FULL_UNKNOPT) != 0) ?    ((is_pair(obj)) ? " unknopt" : " ?35?") : "",
+          /* bit 36+24 */
+          ((full_typ & T_FULL_SAFETY_CHECKED) != 0) ? ((is_pair(obj)) ? " safety-checked" : " ?36?") : "",
+          /* bit 37+24 */
+          ((full_typ & T_FULL_HAS_FN) != 0) ?    ((is_pair(obj)) ? " has-fn" : " ?37") : "",
+          /* bit 62 */
+          ((full_typ & T_UNHEAP) != 0) ?         " unheap" : "",
+          /* bit 63 */
+          ((full_typ & T_GC_MARK) != 0) ?        " gc-marked" : "",
+
+          ((full_typ & UNUSED_BITS) != 0) ?      " unused bits set?" : "",
+          ((is_symbol(obj)) && (((uint8_t)(symbol_type(obj) & 0xff) >= NUM_TYPES) || ((symbol_type(obj) & ~0xffff) != 0))) ? " bad-symbol-type" : "",
+          NULL);
 
   buf = (char *)Malloc(1024);
   snprintf(buf, 1024, "type: %s? (%d), opt_op: %d %s, flags: #x%" PRIx64 "%s",
-	   type_name(sc, obj, NO_ARTICLE), typ,
-	   unchecked_optimize_op(obj), (unchecked_optimize_op(obj) < NUM_OPS) ? op_names[unchecked_optimize_op(obj)] : "", full_typ,
-	   str);
+           type_name(sc, obj, NO_ARTICLE), typ,
+           unchecked_optimize_op(obj), (unchecked_optimize_op(obj) < NUM_OPS) ? op_names[unchecked_optimize_op(obj)] : "", full_typ,
+           str);
   return(buf);
 }
 
@@ -5019,9 +5019,9 @@ static bool has_odd_bits(s7_pointer obj)
   if (is_symbol(obj))
     {
       if ((uint8_t)(symbol_type(obj) & 0xff) >= NUM_TYPES)
-	return(true);
+        return(true);
       if ((symbol_type(obj) & ~0xffff) != 0) /* boolean function bool type and *s7*_let field id */
-	return(true);
+        return(true);
     }
   if ((signed_type(obj) == 0) && ((full_typ & T_GC_MARK) != 0)) return(true);
 
@@ -5040,16 +5040,16 @@ void s7_show_let(s7_scheme *sc) /* debugging convenience */
   for (s7_pointer olet = sc->curlet; olet; olet = let_outlet(olet))
     {
       if (olet == sc->owlet)
-	fprintf(stderr, "(owlet): ");
+        fprintf(stderr, "(owlet): ");
       else
-	if (olet == sc->rootlet)
-	  fprintf(stderr, "(rootlet): ");
-	else
-	  if (is_funclet(olet))
-	    fprintf(stderr, "(%s funclet): ", display(funclet_function(olet)));
-	  else
-	    if (olet == sc->shadow_rootlet)
-	      fprintf(stderr, "(shadow rootlet): ");
+        if (olet == sc->rootlet)
+          fprintf(stderr, "(rootlet): ");
+        else
+          if (is_funclet(olet))
+            fprintf(stderr, "(%s funclet): ", display(funclet_function(olet)));
+          else
+            if (olet == sc->shadow_rootlet)
+              fprintf(stderr, "(shadow rootlet): ");
       fprintf(stderr, "%s\n", display(olet));
     }
 }
@@ -5091,46 +5091,46 @@ static char* show_debugger_bits(s7_pointer p)
   char *bits_str = (char *)Malloc(512);
   int64_t bits = p->debugger_bits;
   snprintf(bits_str, 512, " %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
-	   ((bits & OPT1_SET) != 0) ? " opt1_set" : "",
-	   ((bits & OPT1_FAST) != 0) ? " opt1_fast" : "",
-	   ((bits & OPT1_CFUNC) != 0) ? " opt1_cfunc" : "",
-	   ((bits & OPT1_CLAUSE) != 0) ? " opt1_clause" : "",
-	   ((bits & OPT1_LAMBDA) != 0) ? " opt1_lambda" : "",
-	   ((bits & OPT1_SYM) != 0) ? " opt1_sym" : "",
-	   ((bits & OPT1_PAIR) != 0) ? " opt1_pair" : "",
-	   ((bits & OPT1_CON) != 0) ? " opt1_con" : "",
-	   ((bits & OPT1_ANY) != 0) ? " opt1_any" : "",
-	   ((bits & OPT1_HASH) != 0) ? " opt1_hash" : "",
-
-	   ((bits & OPT2_SET) != 0) ? " opt2_set" : "",
-	   ((bits & OPT2_KEY) != 0) ? " opt2_any" : "",
-	   ((bits & OPT2_SLOW) != 0) ? " opt2_slow" : "",
-	   ((bits & OPT2_SYM) != 0) ? " opt2_sym" : "",
-	   ((bits & OPT2_PAIR) != 0) ? " opt2_pair" : "",
-	   ((bits & OPT2_CON) != 0) ? " opt2_con" : "",
-	   ((bits & OPT2_FX) != 0) ? " opt2_fx" : "",
-	   ((bits & OPT2_FN) != 0) ? " opt2_fn" : "",
-	   ((bits & OPT2_LAMBDA) != 0) ? " opt2_lambda" : "",
-	   ((bits & OPT2_DIRECT) != 0) ? " opt2_direct" : "",
-	   ((bits & OPT2_NAME) != 0) ? " opt2_raw_name" : "",
-	   ((bits & OPT2_INT) != 0) ? " opt2_int" : "",
-
-	   ((bits & OPT3_SET) != 0) ? " opt3_set" : "",
-	   ((bits & OPT3_ARGLEN) != 0) ? " opt3_arglen" : "",
-	   ((bits & OPT3_SYM) != 0) ? " opt3_sym" : "",
-	   ((bits & OPT3_CON) != 0) ? " opt3_con" : "",
-	   ((bits & OPT3_AND) != 0) ? " opt3_pair " : "",
-	   ((bits & OPT3_ANY) != 0) ? " opt3_any " : "",
-	   ((bits & OPT3_LET) != 0) ? " opt3_let " : "",
-	   ((bits & OPT3_BYTE) != 0) ? " opt3_byte " : "",
-	   ((bits & OPT3_DIRECT) != 0) ? " opt3_direct" : "",
-	   ((bits & OPT3_LOCATION) != 0) ? " opt3_location" : "",
-	   ((bits & OPT3_LEN) != 0) ? " opt3_len" : "",
-	   ((bits & OPT3_INT) != 0) ? " opt3_int" : "",
-
-	   ((bits & L_HIT) != 0) ? " let_set" : "",
-	   ((bits & L_FUNC) != 0) ? " let_func" : "",
-	   ((bits & L_DOX) != 0) ? " let_dox" : "");
+           ((bits & OPT1_SET) != 0) ? " opt1_set" : "",
+           ((bits & OPT1_FAST) != 0) ? " opt1_fast" : "",
+           ((bits & OPT1_CFUNC) != 0) ? " opt1_cfunc" : "",
+           ((bits & OPT1_CLAUSE) != 0) ? " opt1_clause" : "",
+           ((bits & OPT1_LAMBDA) != 0) ? " opt1_lambda" : "",
+           ((bits & OPT1_SYM) != 0) ? " opt1_sym" : "",
+           ((bits & OPT1_PAIR) != 0) ? " opt1_pair" : "",
+           ((bits & OPT1_CON) != 0) ? " opt1_con" : "",
+           ((bits & OPT1_ANY) != 0) ? " opt1_any" : "",
+           ((bits & OPT1_HASH) != 0) ? " opt1_hash" : "",
+
+           ((bits & OPT2_SET) != 0) ? " opt2_set" : "",
+           ((bits & OPT2_KEY) != 0) ? " opt2_any" : "",
+           ((bits & OPT2_SLOW) != 0) ? " opt2_slow" : "",
+           ((bits & OPT2_SYM) != 0) ? " opt2_sym" : "",
+           ((bits & OPT2_PAIR) != 0) ? " opt2_pair" : "",
+           ((bits & OPT2_CON) != 0) ? " opt2_con" : "",
+           ((bits & OPT2_FX) != 0) ? " opt2_fx" : "",
+           ((bits & OPT2_FN) != 0) ? " opt2_fn" : "",
+           ((bits & OPT2_LAMBDA) != 0) ? " opt2_lambda" : "",
+           ((bits & OPT2_DIRECT) != 0) ? " opt2_direct" : "",
+           ((bits & OPT2_NAME) != 0) ? " opt2_raw_name" : "",
+           ((bits & OPT2_INT) != 0) ? " opt2_int" : "",
+
+           ((bits & OPT3_SET) != 0) ? " opt3_set" : "",
+           ((bits & OPT3_ARGLEN) != 0) ? " opt3_arglen" : "",
+           ((bits & OPT3_SYM) != 0) ? " opt3_sym" : "",
+           ((bits & OPT3_CON) != 0) ? " opt3_con" : "",
+           ((bits & OPT3_AND) != 0) ? " opt3_pair " : "",
+           ((bits & OPT3_ANY) != 0) ? " opt3_any " : "",
+           ((bits & OPT3_LET) != 0) ? " opt3_let " : "",
+           ((bits & OPT3_BYTE) != 0) ? " opt3_byte " : "",
+           ((bits & OPT3_DIRECT) != 0) ? " opt3_direct" : "",
+           ((bits & OPT3_LOCATION) != 0) ? " opt3_location" : "",
+           ((bits & OPT3_LEN) != 0) ? " opt3_len" : "",
+           ((bits & OPT3_INT) != 0) ? " opt3_int" : "",
+
+           ((bits & L_HIT) != 0) ? " let_set" : "",
+           ((bits & L_FUNC) != 0) ? " let_func" : "",
+           ((bits & L_DOX) != 0) ? " let_dox" : "");
   return(bits_str);
 }
 
@@ -5145,22 +5145,22 @@ static s7_pointer check_ref_one(s7_pointer p, uint8_t expected_type, const char
     {
       uint8_t typ = unchecked_type(p);
       if (typ != expected_type)
-	{
-	  if ((!func1) || (typ != T_FREE))
-	    {
-	      fprintf(stderr, "%s%s[%d]: not %s, but %s (%s)%s\n",
-		      bold_text,
-		      func, line, checked_type_name(cur_sc, expected_type), checked_type_name(cur_sc, typ), object_raw_type_to_string(p),
-		      unbold_text);
-	      if (cur_sc->stop_at_error) abort();
-	    }
-	  else
-	    if ((strcmp(func, func1) != 0) &&
-		((!func2) || (strcmp(func, func2) != 0)))
-	      {
-		fprintf(stderr, "%s%s[%d]: free cell, not %s%s\n", bold_text, func, line, checked_type_name(cur_sc, expected_type), unbold_text);
-		if (cur_sc->stop_at_error) abort();
-	      }}}
+        {
+          if ((!func1) || (typ != T_FREE))
+            {
+              fprintf(stderr, "%s%s[%d]: not %s, but %s (%s)%s\n",
+                      bold_text,
+                      func, line, checked_type_name(cur_sc, expected_type), checked_type_name(cur_sc, typ), object_raw_type_to_string(p),
+                      unbold_text);
+              if (cur_sc->stop_at_error) abort();
+            }
+          else
+            if ((strcmp(func, func1) != 0) &&
+                ((!func2) || (strcmp(func, func2) != 0)))
+              {
+                fprintf(stderr, "%s%s[%d]: free cell, not %s%s\n", bold_text, func, line, checked_type_name(cur_sc, expected_type), unbold_text);
+                if (cur_sc->stop_at_error) abort();
+              }}}
   return(p);
 }
 
@@ -5199,7 +5199,7 @@ static s7_pointer check_ref_two(s7_pointer p, uint8_t expected_type, int32_t oth
     {
       uint8_t typ = unchecked_type(p);
       if ((typ != expected_type) && (typ != other_type))
-	return(check_ref_one(p, expected_type, func, line, func1, func2));
+        return(check_ref_one(p, expected_type, func, line, func1, func2));
     }
   return(p);
 }
@@ -5336,22 +5336,22 @@ static void print_gc_info(s7_scheme *sc, s7_pointer obj, const char *func, int32
       fprintf(stderr, "%s from %s[%d]: %p type is %d?\n", __func__, func, line, obj, unchecked_type(obj));
     else
       {
-	s7_int free_type = full_type(obj);
-	char *bits;
-	char fline[128];
-	full_type(obj) = obj->alloc_type; /* not set_full_type here!  it clobbers existing alloc/free info */
-	sc->printing_gc_info = true;
-	bits = describe_type_bits(sc, obj); /* this func called in type macro */
-	sc->printing_gc_info = false;
-	full_type(obj) = free_type;
-	if (obj->explicit_free_line > 0)
-	  snprintf(fline, 128, ", freed at %d, ", obj->explicit_free_line);
-	fprintf(stderr, "%s%p is free (%s[%d], alloc type: %s %" ld64 " #x%" PRIx64 " (%s)), alloc: %s[%d], %sgc: %s[%d], gc: %d%s",
-		bold_text, obj, func, line, s7_type_names[obj->alloc_type & 0xff], obj->alloc_type, obj->alloc_type,
-		bits, obj->alloc_func, obj->alloc_line,
-		(obj->explicit_free_line > 0) ? fline : "", obj->gc_func, obj->gc_line,	obj->uses, unbold_text);
-	fprintf(stderr, "\n");
-	free(bits);
+        s7_int free_type = full_type(obj);
+        char *bits;
+        char fline[128];
+        full_type(obj) = obj->alloc_type; /* not set_full_type here!  it clobbers existing alloc/free info */
+        sc->printing_gc_info = true;
+        bits = describe_type_bits(sc, obj); /* this func called in type macro */
+        sc->printing_gc_info = false;
+        full_type(obj) = free_type;
+        if (obj->explicit_free_line > 0)
+          snprintf(fline, 128, ", freed at %d, ", obj->explicit_free_line);
+        fprintf(stderr, "%s%p is free (%s[%d], alloc type: %s %" ld64 " #x%" PRIx64 " (%s)), alloc: %s[%d], %sgc: %s[%d], gc: %d%s",
+                bold_text, obj, func, line, s7_type_names[obj->alloc_type & 0xff], obj->alloc_type, obj->alloc_type,
+                bits, obj->alloc_func, obj->alloc_line,
+                (obj->explicit_free_line > 0) ? fline : "", obj->gc_func, obj->gc_line,        obj->uses, unbold_text);
+        fprintf(stderr, "\n");
+        free(bits);
       }
   if (sc->stop_at_error) abort();
 }
@@ -5366,8 +5366,8 @@ static s7_pointer check_nref(s7_pointer p, const char *func, int32_t line)
   else
     if (unchecked_type(p) >= NUM_TYPES)
       {
-	fprintf(stderr, "%s%s[%d]: attempt to use messed up cell (type: %d)%s\n", bold_text, func, line, unchecked_type(p), unbold_text);
-	if (cur_sc->stop_at_error) abort();
+        fprintf(stderr, "%s%s[%d]: attempt to use messed up cell (type: %d)%s\n", bold_text, func, line, unchecked_type(p), unbold_text);
+        if (cur_sc->stop_at_error) abort();
       }
   if (unchecked_type(p) == T_FREE)
     {
@@ -5407,15 +5407,15 @@ static s7_pointer check_ref_key(s7_pointer p, const char *func, int32_t line)
   if (strcmp(func, "new_symbol") != 0)
     {
       if (global_value(p) != p)
-	{
-	  fprintf(stderr, "%s%s[%d]: keyword %s value is not itself (type: %s)%s\n",
-		  bold_text, func, line, display(p), s7_type_names[unchecked_type(global_value(p))], unbold_text);
-	  if (cur_sc->stop_at_error) abort();
-	}
+        {
+          fprintf(stderr, "%s%s[%d]: keyword %s value is not itself (type: %s)%s\n",
+                  bold_text, func, line, display(p), s7_type_names[unchecked_type(global_value(p))], unbold_text);
+          if (cur_sc->stop_at_error) abort();
+        }
       if (in_heap(keyword_symbol_unchecked(p)))
-	fprintf(stderr, "%s%s[%d]: keyword %s symbol is in the heap%s\n", bold_text, func, line, display(p), unbold_text);
+        fprintf(stderr, "%s%s[%d]: keyword %s symbol is in the heap%s\n", bold_text, func, line, display(p), unbold_text);
       if (has_odd_bits(p))
-	{char *s; fprintf(stderr, "odd bits: %s\n", s = describe_type_bits(cur_sc, p)); free(s);}
+        {char *s; fprintf(stderr, "odd bits: %s\n", s = describe_type_bits(cur_sc, p)); free(s);}
     }
   return(p);
 }
@@ -5511,8 +5511,8 @@ static void show_opt1_bits(s7_pointer p, const char *func, int32_t line, uint64_
 {
   char *bits = show_debugger_bits(p);
   fprintf(stderr, "%s%s[%d]%s: opt1: %p->%p wants %s, debugger bits are %" PRIx64 "%s but expects %" ld64,
-	  bold_text, func, line, unbold_text,
-	  p, p->object.cons.opt1, opt1_role_name(role), p->debugger_bits, bits, (s7_int)role);
+          bold_text, func, line, unbold_text,
+          p, p->object.cons.opt1, opt1_role_name(role), p->debugger_bits, bits, (s7_int)role);
   free(bits);
 }
 
@@ -5540,9 +5540,9 @@ static s7_pointer set_opt1_1(s7_pointer p, s7_pointer x, uint64_t role, const ch
       ((p->debugger_bits & OPT1_MASK) == OPT1_LAMBDA) &&
       (role != OPT1_CFUNC))
     fprintf(stderr, "%s[%d]: opt1_lambda -> %s, op: %s, x: %s,\n    %s\n",
-	    func, line, opt1_role_name(role),
-	    (is_optimized(x)) ? op_names[optimize_op(x)] : "unopt",
-	    display(x), display(p));
+            func, line, opt1_role_name(role),
+            (is_optimized(x)) ? op_names[optimize_op(x)] : "unopt",
+            display(x), display(p));
   p->object.cons.opt1 = x;
   base_opt1(p, role);
   return(x);
@@ -5568,24 +5568,24 @@ static void show_opt2_bits(s7_pointer p, const char *func, int32_t line, uint64_
 {
   char *bits = show_debugger_bits(p);
   fprintf(stderr, "%s%s[%d]%s: %s opt2: %p->%p wants %s, debugger bits are %" PRIx64 "%s but expects %" ld64 " %s",
-	  bold_text, func, line, unbold_text,
-	  display(p), p, p->object.cons.o2.opt2, opt2_role_name(role), p->debugger_bits, bits, (s7_int)role, opt2_role_name(role));
+          bold_text, func, line, unbold_text,
+          display(p), p, p->object.cons.o2.opt2, opt2_role_name(role), p->debugger_bits, bits, (s7_int)role, opt2_role_name(role));
   free(bits);
 }
 
 static bool f_call_func_mismatch(const char *func)
 {
   return((!safe_strcmp(func, "check_and")) &&  /* these reflect set_fx|unchecked where the destination checks for null fx_proc */
-	 (!safe_strcmp(func, "check_or")) &&
-	 (!safe_strcmp(func, "eval")) &&
-	 (!safe_strcmp(func, "set_any_c_np")) &&
-	 (!safe_strcmp(func, "set_any_closure_np")) &&
-	 (!safe_strcmp(func, "optimize_func_two_args")) &&
-	 (!safe_strcmp(func, "optimize_func_many_args")) &&
-	 (!safe_strcmp(func, "optimize_func_three_args")) &&
-	 (!safe_strcmp(func, "fx_c_ff")) &&
-	 (!safe_strcmp(func, "op_map_for_each_fa")) &&
-	 (!safe_strcmp(func, "op_map_for_each_faa")));
+         (!safe_strcmp(func, "check_or")) &&
+         (!safe_strcmp(func, "eval")) &&
+         (!safe_strcmp(func, "set_any_c_np")) &&
+         (!safe_strcmp(func, "set_any_closure_np")) &&
+         (!safe_strcmp(func, "optimize_func_two_args")) &&
+         (!safe_strcmp(func, "optimize_func_many_args")) &&
+         (!safe_strcmp(func, "optimize_func_three_args")) &&
+         (!safe_strcmp(func, "fx_c_ff")) &&
+         (!safe_strcmp(func, "op_map_for_each_fa")) &&
+         (!safe_strcmp(func, "op_map_for_each_faa")));
 }
 
 static void check_opt2_bits(s7_scheme *sc, s7_pointer p, uint64_t role, const char *func, int32_t line)
@@ -5627,10 +5627,10 @@ static void set_opt2_1(s7_scheme *sc, s7_pointer p, s7_pointer x, uint64_t role,
       (x == NULL) &&
       (f_call_func_mismatch(func)))
     fprintf(stderr, "%s[%d]: set fx_proc for %s to null (%s%s%s)\n", func, line,
-	    string_value(object_to_string_truncated(sc, p)),
-	    ((is_h_optimized(car(p))) && (is_safe_c_op(optimize_op(car(p))))) ? bold_text : "",
-	    op_names[optimize_op(car(p))],
-	    ((is_h_optimized(car(p))) && (is_safe_c_op(optimize_op(car(p))))) ? unbold_text : "");
+            string_value(object_to_string_truncated(sc, p)),
+            ((is_h_optimized(car(p))) && (is_safe_c_op(optimize_op(car(p))))) ? bold_text : "",
+            op_names[optimize_op(car(p))],
+            ((is_h_optimized(car(p))) && (is_safe_c_op(optimize_op(car(p))))) ? unbold_text : "");
   if ((role != OPT2_FX) && (role != OPT2_DIRECT) && (has_fx(p))) /* sometimes opt2_direct just specializes fx */
     {
       fprintf(stderr, "%s[%d]: overwrite has_fx: %s %s\n", func, line, opt2_role_name(role), display_truncated(p));
@@ -5787,8 +5787,8 @@ static void print_debugging_state(s7_scheme *sc, s7_pointer obj, s7_pointer port
   b = mallocate(sc, len);
   str = (char *)block_data(b);
   nlen = snprintf(str, len,
-		  "\n<%s %s,\n  alloc: %s[%d] %s, %d uses>", excl_name, current_bits,
-		  obj->alloc_func, obj->alloc_line, allocated_bits, obj->uses);
+                  "\n<%s %s,\n  alloc: %s[%d] %s, %d uses>", excl_name, current_bits,
+                  obj->alloc_func, obj->alloc_line, allocated_bits, obj->uses);
   free(current_bits);
   free(allocated_bits);
   if (is_null(port))
@@ -5979,7 +5979,7 @@ static const char *make_type_name(s7_scheme *sc, const char *name, article_t art
       i = 1;
       sc->typnam[0] = 'a';
       if ((name[0] == 'a') || (name[0] == 'e') || (name[0] == 'i') || (name[0] == 'o') || (name[0] == 'u'))
-	sc->typnam[i++] = 'n';
+        sc->typnam[i++] = 'n';
       sc->typnam[i++] = ' ';
     }
   else i = 0;
@@ -6059,8 +6059,8 @@ static s7_pointer find_let(s7_scheme *sc, s7_pointer obj)
       return(c_object_let(obj));
     case T_C_POINTER:
       if ((is_let(c_pointer_info(obj))) &&
-	  (c_pointer_info(obj) != sc->rootlet))
-	return(c_pointer_info(obj));
+          (c_pointer_info(obj) != sc->rootlet))
+        return(c_pointer_info(obj));
     case T_CONTINUATION: case T_GOTO:
     case T_C_MACRO: case T_C_FUNCTION_STAR: case T_C_FUNCTION: case T_C_RST_NO_REQ_FUNCTION:
       return(sc->rootlet);
@@ -6101,15 +6101,15 @@ static const char *type_name(s7_scheme *sc, s7_pointer arg, article_t article)
     case T_OUTPUT_PORT: return(make_type_name(sc, (is_file_port(arg)) ? "output file port" : ((is_string_port(arg)) ? "output string port" : "output port"), article));
     case T_LET:
       if (has_active_methods(sc, arg))
-	{
-	  s7_pointer class_name = find_method(sc, arg, sc->class_name_symbol);
-	  if (is_symbol(class_name))
-	    return(make_type_name(sc, symbol_name(class_name), article));
-	}
+        {
+          s7_pointer class_name = find_method(sc, arg, sc->class_name_symbol);
+          if (is_symbol(class_name))
+            return(make_type_name(sc, symbol_name(class_name), article));
+        }
     default:
       {
-	const char *str = type_name_from_type(unchecked_type(arg), article);
-	if (str) return(str);
+        const char *str = type_name_from_type(unchecked_type(arg), article);
+        if (str) return(str);
       }}
   return("messed up object");
 }
@@ -6120,7 +6120,7 @@ static s7_pointer object_type_name(s7_scheme *sc, s7_pointer x)
   if (has_active_methods(sc, x))
     {
       s7_pointer p = find_method_with_let(sc, x, sc->class_name_symbol);
-      if (is_symbol(p))	return(symbol_name_cell(p));
+      if (is_symbol(p))        return(symbol_name_cell(p));
     }
   typ = type(x);
   if (typ < NUM_TYPES)
@@ -6191,11 +6191,11 @@ s7_pointer s7_out_of_range_error(s7_scheme *sc, const char *caller, s7_int arg_n
   if (arg_n > 0)
     {
       set_wlist_4(cdr(sc->out_of_range_info), wrap_string(sc, caller, safe_strlen(caller)),
-		  wrap_integer(sc, arg_n), arg, wrap_string(sc, descr, safe_strlen(descr)));
+                  wrap_integer(sc, arg_n), arg, wrap_string(sc, descr, safe_strlen(descr)));
       error_nr(sc, sc->out_of_range_symbol, sc->out_of_range_info);
     }
   set_wlist_3(cdr(sc->sole_arg_out_of_range_info), wrap_string(sc, caller, safe_strlen(caller)),
-	      arg, wrap_string(sc, descr, safe_strlen(descr)));
+              arg, wrap_string(sc, descr, safe_strlen(descr)));
   error_nr(sc, sc->out_of_range_symbol, sc->sole_arg_out_of_range_info);
   return(sc->out_of_range_symbol);
 }
@@ -6208,7 +6208,7 @@ static noreturn void wrong_number_of_arguments_error_nr(s7_scheme *sc, const cha
 s7_pointer s7_wrong_number_of_args_error(s7_scheme *sc, const char *caller, s7_pointer args)
 {
   error_nr(sc, sc->wrong_number_of_args_symbol,
-	   set_elist_2(sc, wrap_string(sc, caller, safe_strlen(caller)), args)); /* "caller" includes the format directives */
+           set_elist_2(sc, wrap_string(sc, caller, safe_strlen(caller)), args)); /* "caller" includes the format directives */
   return(sc->wrong_number_of_args_symbol);
 }
 
@@ -6241,11 +6241,11 @@ static s7_pointer missing_method_class_name(s7_scheme *sc, s7_pointer obj)
 static noreturn void missing_method_error_nr(s7_scheme *sc, s7_pointer method, s7_pointer obj)
 {
   error_nr(sc, sc->missing_method_symbol,
-	   set_elist_4(sc, wrap_string(sc, "~S method is not defined in ~A ~A", 33), method,
-		       (is_c_object(obj)) ? c_object_scheme_name(sc, obj) :
+           set_elist_4(sc, wrap_string(sc, "~S method is not defined in ~A ~A", 33), method,
+                       (is_c_object(obj)) ? c_object_scheme_name(sc, obj) :
                          (((is_let(obj)) && (is_openlet(obj))) ? missing_method_class_name(sc, obj) :
                           s7_make_string_wrapper(sc, type_name(sc, obj, NO_ARTICLE))),
-		       object_to_string_truncated(sc, obj)));
+                       object_to_string_truncated(sc, obj)));
 }
 
 static noreturn void immutable_object_error_nr(s7_scheme *sc, s7_pointer info) {error_nr(sc, sc->immutable_error_symbol, info);}
@@ -6259,11 +6259,11 @@ s7_pointer s7_method(s7_scheme *sc, s7_pointer obj, s7_pointer method)
 }
 
 /* if a method is shadowing a built-in like abs, it should expect the same args as abs and behave the same -- no multiple values etc */
-#define check_method(Sc, Obj, Method, Args)		\
-  {							\
-    s7_pointer func;					\
-    if ((has_active_methods(Sc, Obj)) &&				\
-	((func = find_method_with_let(Sc, Obj, Method)) != Sc->undefined)) \
+#define check_method(Sc, Obj, Method, Args)                \
+  {                                                        \
+    s7_pointer func;                                        \
+    if ((has_active_methods(Sc, Obj)) &&                                \
+        ((func = find_method_with_let(Sc, Obj, Method)) != Sc->undefined)) \
       return(s7_apply_function(Sc, func, Args)); \
   }
 
@@ -6275,12 +6275,12 @@ static s7_pointer apply_boolean_method(s7_scheme *sc, s7_pointer obj, s7_pointer
 }
 
 /* this is a macro mainly to simplify the Checker handling */
-#define check_boolean_method(Sc, Checker, Method, Args)	       \
-  {							       \
-    s7_pointer p = car(Args);				       \
-    if (Checker(p)) return(Sc->T);			       \
-    if (!has_active_methods(Sc, p)) return(Sc->F);	       \
-    return(apply_boolean_method(Sc, p, Method));	       \
+#define check_boolean_method(Sc, Checker, Method, Args)               \
+  {                                                               \
+    s7_pointer p = car(Args);                                       \
+    if (Checker(p)) return(Sc->T);                               \
+    if (!has_active_methods(Sc, p)) return(Sc->F);               \
+    return(apply_boolean_method(Sc, p, Method));               \
   }
 
 static s7_pointer apply_method_closure(s7_scheme *sc, s7_pointer func, s7_pointer args);
@@ -6310,7 +6310,7 @@ static s7_pointer mutable_method_or_bust(s7_scheme *sc, s7_pointer obj, s7_point
 }
 
 static s7_pointer mutable_method_or_bust_ppp(s7_scheme *sc, s7_pointer obj, s7_pointer method,
-					     s7_pointer x1, s7_pointer x2, s7_pointer x3, s7_pointer typ, int32_t num)
+                                             s7_pointer x1, s7_pointer x2, s7_pointer x3, s7_pointer typ, int32_t num)
 {
   return(mutable_method_or_bust(sc, obj, method, set_qlist_3(sc, x1, x2, x3), typ, num)); /* was list_3, plist_3 not safe */
 }
@@ -6328,14 +6328,14 @@ static s7_pointer method_or_bust_pp(s7_scheme *sc, s7_pointer obj, s7_pointer me
 }
 
 static s7_pointer method_or_bust_ppp(s7_scheme *sc, s7_pointer obj, s7_pointer method,
-				     s7_pointer x1, s7_pointer x2, s7_pointer x3, s7_pointer typ, int32_t num)
+                                     s7_pointer x1, s7_pointer x2, s7_pointer x3, s7_pointer typ, int32_t num)
 {
   if (!has_active_methods(sc, obj)) wrong_type_error_nr(sc, method, num, obj, typ);
   return(find_and_apply_method(sc, obj, method, set_qlist_3(sc, x1, x2, x3))); /* was list_3, plist not safe */
 }
 
 static s7_pointer method_or_bust_with_type_and_loc_pp(s7_scheme *sc, s7_pointer obj, s7_pointer method,
-						      s7_pointer x1, s7_pointer x2, s7_pointer typ, int32_t num)
+                                                      s7_pointer x1, s7_pointer x2, s7_pointer typ, int32_t num)
 {
   int32_t loc = sc->error_argnum + num;
   sc->error_argnum = 0;
@@ -6344,14 +6344,14 @@ static s7_pointer method_or_bust_with_type_and_loc_pp(s7_scheme *sc, s7_pointer
 }
 
 static s7_pointer method_or_bust_with_type_pi(s7_scheme *sc, s7_pointer obj, s7_pointer method,
-					      s7_pointer x1, s7_int x2, s7_pointer typ, int32_t num)
+                                              s7_pointer x1, s7_int x2, s7_pointer typ, int32_t num)
 {
   if (!has_active_methods(sc, obj)) wrong_type_error_nr(sc, method, num, obj, typ);
   return(find_and_apply_method(sc, obj, method, set_mlist_2(sc, x1, make_integer(sc, x2))));
 }
 
 static s7_pointer method_or_bust_with_type_pf(s7_scheme *sc, s7_pointer obj, s7_pointer method,
-					      s7_pointer x1, s7_double x2, s7_pointer typ, int32_t num)
+                                              s7_pointer x1, s7_double x2, s7_pointer typ, int32_t num)
 {
   if (!has_active_methods(sc, obj)) wrong_type_error_nr(sc, method, num, obj, typ);
   return(find_and_apply_method(sc, obj, method, set_mlist_2(sc, x1, make_real(sc, x2))));
@@ -6484,17 +6484,17 @@ static s7_pointer g_is_immutable(s7_scheme *sc, s7_pointer args)
     {
       if (is_keyword(p)) return(sc->T);
       if (is_pair(cdr(args)))
-	{
-	  s7_pointer e = cadr(args);
-	  if (!is_let(e))
-	    wrong_type_error_nr(sc, sc->is_immutable_symbol, 2, e, a_let_string);
-	  if (e == sc->rootlet)
-	    slot = global_slot(p);
-	  else slot = lookup_slot_from((is_keyword(p)) ? keyword_symbol(p) : p, e);
-	}
+        {
+          s7_pointer e = cadr(args);
+          if (!is_let(e))
+            wrong_type_error_nr(sc, sc->is_immutable_symbol, 2, e, a_let_string);
+          if (e == sc->rootlet)
+            slot = global_slot(p);
+          else slot = lookup_slot_from((is_keyword(p)) ? keyword_symbol(p) : p, e);
+        }
       else slot = s7_slot(sc, p);
       if (is_slot(slot)) /* might be #<undefined> */
-	return(make_boolean(sc, is_immutable_slot(slot)));
+        return(make_boolean(sc, is_immutable_slot(slot)));
     }
   else
     if ((is_pair(cdr(args))) && (!is_let(cadr(args)))) /* (immutable? 1 2) */
@@ -6512,7 +6512,7 @@ s7_pointer s7_immutable(s7_pointer p)
       if (is_keyword(p)) return(p);
       slot = s7_slot(cur_sc, p);  /* ouch! we need the s7_scheme* argument */
       if (is_slot(slot))
-	set_immutable_slot(slot);
+        set_immutable_slot(slot);
       /* symbol is not set immutable (as below) */
     }
   else set_immutable(p);
@@ -6527,19 +6527,19 @@ static s7_pointer g_immutable(s7_scheme *sc, s7_pointer args)
   if (is_symbol(p))
     {
       if (is_pair(cdr(args)))
-	{
-	  s7_pointer e = cadr(args);
-	  if (!is_let(e))
-	    wrong_type_error_nr(sc, sc->immutable_symbol, 2, e, a_let_string);
-	  slot = symbol_to_local_slot(sc, (is_keyword(p)) ? keyword_symbol(p) : p, e); /* different from immutable? */
-	}
+        {
+          s7_pointer e = cadr(args);
+          if (!is_let(e))
+            wrong_type_error_nr(sc, sc->immutable_symbol, 2, e, a_let_string);
+          slot = symbol_to_local_slot(sc, (is_keyword(p)) ? keyword_symbol(p) : p, e); /* different from immutable? */
+        }
       else
-	{
-	  if (is_keyword(p)) return(p);
-	  slot = s7_slot(sc, p);
-	}
+        {
+          if (is_keyword(p)) return(p);
+          slot = s7_slot(sc, p);
+        }
       if (is_slot(slot))
-	set_immutable_slot(slot);
+        set_immutable_slot(slot);
       return(p);  /* symbol is not set immutable ? */
     }
   if ((is_pair(cdr(args))) && (!is_let(cadr(args)))) /* (immutable! 1 2) */
@@ -6569,7 +6569,7 @@ static s7_int gc_protect_2(s7_scheme *sc, s7_pointer x, int32_t line)
     {
       already_warned = true;
       fprintf(stderr, "s7_gc_protect has protected more than 8192 values? (line: %d, code: %s, loc: %" ld64 ")\n",
-	      line, string_value(s7_object_to_string(sc, current_code(sc), false)), loc);
+              line, string_value(s7_object_to_string(sc, current_code(sc), false)), loc);
       if ((S7_DEBUGGING) && (sc->stop_at_error)) abort();
     }
   return(loc);
@@ -6613,7 +6613,7 @@ void s7_gc_unprotect_at(s7_scheme *sc, s7_int loc)
   if (loc < sc->protected_objects_size)
     {
       if (vector_element(sc->protected_objects, loc) != sc->unused)
-	sc->protected_objects_free_list[++sc->protected_objects_free_list_loc] = loc;
+        sc->protected_objects_free_list[++sc->protected_objects_free_list_loc] = loc;
       else if (S7_DEBUGGING) fprintf(stderr, "redundant gc_unprotect_at location %" ld64 "\n", loc);
       vector_element(sc->protected_objects, loc) = sc->unused;
     }
@@ -6656,7 +6656,7 @@ static void process_iterator(s7_scheme *unused_sc, s7_pointer s1)
       s7_pointer h = iterator_sequence(s1);
       clear_weak_hash_iterator(s1);
       if (unchecked_type(h) == T_HASH_TABLE)
-	weak_hash_iters(h)--;
+        weak_hash_iters(h)--;
     }
 }
 
@@ -6667,10 +6667,10 @@ static void process_multivector(s7_scheme *sc, s7_pointer s1)
       (info != sc->wrap_only))
     {
       if (vector_elements_should_be_freed(info)) /* a kludge for foreign code convenience */
-	{
-	  free(any_vector_elements(s1));
-	  vector_elements_should_be_freed(info) = false;
-	}
+        {
+          free(any_vector_elements(s1));
+          vector_elements_should_be_freed(info) = false;
+        }
       liberate(sc, info);
       vector_set_dimension_info(s1, NULL);
     }
@@ -6710,15 +6710,15 @@ static void process_input_port(s7_scheme *sc, s7_pointer s1)
   if (!port_is_closed(s1))
     {
       if (is_file_port(s1))
-	{
-	  if (port_file(s1))
-	    {
-	      fclose(port_file(s1));
-	      port_file(s1) = NULL;
-	    }}
+        {
+          if (port_file(s1))
+            {
+              fclose(port_file(s1));
+              port_file(s1) = NULL;
+            }}
       else
-	if (is_function_port(s1))
-	  close_input_function(sc, s1);
+        if (is_function_port(s1))
+          close_input_function(sc, s1);
     }
   if (port_needs_free(s1))
     free_port_data(sc, s1);
@@ -6741,10 +6741,10 @@ static void process_output_port(s7_scheme *sc, s7_pointer s1)
     {
       port_needs_free(s1) = false;
       if (port_data_block(s1))
-	{
-	  liberate(sc, port_data_block(s1));
-	  port_data_block(s1) = NULL;
-	}}
+        {
+          liberate(sc, port_data_block(s1));
+          port_data_block(s1) = NULL;
+        }}
 }
 
 static void process_continuation(s7_scheme *sc, s7_pointer s1)
@@ -6820,20 +6820,20 @@ static void sweep(s7_scheme *sc)
   s7_int i, j;
   gc_list_t *gp;
 
-  #define process_gc_list(Code)				\
-    if (gp->loc > 0)					\
-      {							\
-        for (i = 0, j = 0; i < gp->loc; i++)		\
-          {						\
-            s7_pointer s1 = gp->list[i];		\
-            if (is_free_and_clear(s1))			\
-              {						\
-                Code;					\
-              }						\
-            else gp->list[j++] = s1;			\
-          }						\
-        gp->loc = j;					\
-      }							\
+  #define process_gc_list(Code)                                \
+    if (gp->loc > 0)                                        \
+      {                                                        \
+        for (i = 0, j = 0; i < gp->loc; i++)                \
+          {                                                \
+            s7_pointer s1 = gp->list[i];                \
+            if (is_free_and_clear(s1))                        \
+              {                                                \
+                Code;                                        \
+              }                                                \
+            else gp->list[j++] = s1;                        \
+          }                                                \
+        gp->loc = j;                                        \
+      }                                                        \
 
   gp = sc->strings;
   process_gc_list(liberate(sc, string_block(s1)))
@@ -6858,18 +6858,18 @@ static void sweep(s7_scheme *sc)
   if (gp->loc > 0)
     {
       for (i = 0, j = 0; i < gp->loc; i++)
-	{
-	  s7_pointer s1 = gp->list[i];
-	  if (is_free_and_clear(s1))
-	    free_hash_table(sc, s1);
-	  else
-	    {
-	      if ((is_weak_hash_table(s1)) &&
-		  (weak_hash_iters(s1) == 0) &&
-		  (hash_table_entries(s1) > 0))
-		cull_weak_hash_table(sc, s1);
-	      gp->list[j++] = s1;
-	    }}
+        {
+          s7_pointer s1 = gp->list[i];
+          if (is_free_and_clear(s1))
+            free_hash_table(sc, s1);
+          else
+            {
+              if ((is_weak_hash_table(s1)) &&
+                  (weak_hash_iters(s1) == 0) &&
+                  (hash_table_entries(s1) > 0))
+                cull_weak_hash_table(sc, s1);
+              gp->list[j++] = s1;
+            }}
       gp->loc = j;
     }
 
@@ -6880,11 +6880,11 @@ static void sweep(s7_scheme *sc)
   if (gp->loc > 0)
     {
       for (i = 0, j = 0; i < gp->loc; i++)
-	{
-	  s7_pointer s1 = gp->list[i];
-	  if (!is_free_and_clear(s1))
-	    gp->list[j++] = s1;
-	}
+        {
+          s7_pointer s1 = gp->list[i];
+          if (!is_free_and_clear(s1))
+            gp->list[j++] = s1;
+        }
       gp->loc = j;
     }
 
@@ -6904,18 +6904,18 @@ static void sweep(s7_scheme *sc)
   if (gp->loc > 0)
     {
       for (i = 0, j = 0; i < gp->loc; i++)
-	{
-	  s7_pointer s1 = gp->list[i];
-	  if (!is_free_and_clear(s1))
-	    {
-	      if (is_free_and_clear(c_pointer_weak1(s1)))
-		c_pointer_weak1(s1) = sc->F;
-	      if (is_free_and_clear(c_pointer_weak2(s1)))
-		c_pointer_weak2(s1) = sc->F;
-	      if ((c_pointer_weak1(s1) != sc->F) ||
-		  (c_pointer_weak2(s1) != sc->F))
-		gp->list[j++] = s1;
-	    }}
+        {
+          s7_pointer s1 = gp->list[i];
+          if (!is_free_and_clear(s1))
+            {
+              if (is_free_and_clear(c_pointer_weak1(s1)))
+                c_pointer_weak1(s1) = sc->F;
+              if (is_free_and_clear(c_pointer_weak2(s1)))
+                c_pointer_weak2(s1) = sc->F;
+              if ((c_pointer_weak1(s1) != sc->F) ||
+                  (c_pointer_weak2(s1) != sc->F))
+                gp->list[j++] = s1;
+            }}
       gp->loc = j;
     }
 
@@ -7037,10 +7037,10 @@ static void add_setter(s7_scheme *sc, s7_pointer p, s7_pointer setter)
     {
       s7_pointer x = sc->setters[i];
       if (car(x) == p)
-	{
-	  unchecked_set_cdr(x, setter);
-	  return;
- 	}}
+        {
+          unchecked_set_cdr(x, setter);
+          return;
+         }}
   if (sc->setters_loc == sc->setters_size)
     {
       sc->setters_size *= 2;
@@ -7059,8 +7059,8 @@ static void mark_symbol_vector(s7_pointer p, s7_int len)
     {
       s7_pointer *e = vector_elements(p);
       for (s7_int i = 0; i < len; i++)
-	if ((is_symbol(e[i])) && (is_gensym(e[i]))) /* need is_symbol: make-vector + set! vector-typer symbol? where init is not a symbol */
-	  set_mark(e[i]);
+        if ((is_symbol(e[i])) && (is_gensym(e[i]))) /* need is_symbol: make-vector + set! vector-typer symbol? where init is not a symbol */
+          set_mark(e[i]);
     }
 }
 
@@ -7111,8 +7111,8 @@ static void mark_let(s7_pointer let)
       if ((has_dox_slot2(x)) && (is_slot(let_dox_slot2(x)))) mark_slot(let_dox_slot2(x));
       /* it can happen (call/cc related) that let_dox_slot2 is a slot but invalid, but in that case has_dox_slot2 will not be set(?) */
       for (s7_pointer y = let_slots(x); tis_slot(y); y = next_slot(y))
-	if (!is_marked(y)) /* slot value might be the enclosing let */
-	  mark_slot(y);
+        if (!is_marked(y)) /* slot value might be the enclosing let */
+          mark_slot(y);
     }
 }
 
@@ -7124,9 +7124,9 @@ static void gc_owlet_mark(s7_pointer tp)
     {
       s7_pointer p = tp;
       do {
-	set_mark(p);
-	gc_mark(car(p)); /* does this need to be gc_owlet_mark? I can't find a case */
-	p = cdr(p);
+        set_mark(p);
+        gc_mark(car(p)); /* does this need to be gc_owlet_mark? I can't find a case */
+        p = cdr(p);
       } while ((is_pair(p)) && (p != tp) && ((!in_heap(p)) || (!is_marked(p)))); /* ((full_type(p) & (TYPE_MASK | T_GC_MARK)) == T_PAIR) is much slower */
       gc_mark(p);
     }
@@ -7142,11 +7142,11 @@ static void mark_owlet(s7_scheme *sc)
   {
     for (s7_pointer p1 = sc->eval_history1, p2 = sc->eval_history2, p3 = sc->history_pairs; ; p2 = cdr(p2), p3 = cdr(p3))
       {
-	gc_owlet_mark(car(p1));
-	gc_owlet_mark(car(p2));
-	gc_owlet_mark(car(p3));
-	p1 = cdr(p1);
-	if (p1 == sc->eval_history1) break; /* these are circular lists */
+        gc_owlet_mark(car(p1));
+        gc_owlet_mark(car(p2));
+        gc_owlet_mark(car(p3));
+        p1 = cdr(p1);
+        if (p1 == sc->eval_history1) break; /* these are circular lists */
       }}
 #endif
   /* sc->error_type and friends are slots in owlet */
@@ -7326,29 +7326,29 @@ static void mark_hash_table(s7_pointer p)
       hash_entry_t **last = (hash_entry_t **)(entries + len);
 
       if ((is_weak_hash_table(p)) &&
-	  (weak_hash_iters(p) == 0))
-	while (entries < last)
-	  {
-	    hash_entry_t *xp;
-	    for (xp = *entries++; xp; xp = hash_entry_next(xp))
-	      gc_mark(hash_entry_value(xp));
-	    for (xp = *entries++; xp; xp = hash_entry_next(xp))
-	      gc_mark(hash_entry_value(xp));
-	  }
+          (weak_hash_iters(p) == 0))
+        while (entries < last)
+          {
+            hash_entry_t *xp;
+            for (xp = *entries++; xp; xp = hash_entry_next(xp))
+              gc_mark(hash_entry_value(xp));
+            for (xp = *entries++; xp; xp = hash_entry_next(xp))
+              gc_mark(hash_entry_value(xp));
+          }
       else
-	while (entries < last) /* counting entries here was slightly faster */
-	  {
-	    hash_entry_t *xp;
-	    for (xp = *entries++; xp; xp = hash_entry_next(xp))
-	      {
-		gc_mark(hash_entry_key(xp));
-		gc_mark(hash_entry_value(xp));
-	      }
-	    for (xp = *entries++; xp; xp = hash_entry_next(xp))
-	      {
-		gc_mark(hash_entry_key(xp));
-		gc_mark(hash_entry_value(xp));
-	      }}}
+        while (entries < last) /* counting entries here was slightly faster */
+          {
+            hash_entry_t *xp;
+            for (xp = *entries++; xp; xp = hash_entry_next(xp))
+              {
+                gc_mark(hash_entry_key(xp));
+                gc_mark(hash_entry_value(xp));
+              }
+            for (xp = *entries++; xp; xp = hash_entry_next(xp))
+              {
+                gc_mark(hash_entry_key(xp));
+                gc_mark(hash_entry_value(xp));
+              }}}
 }
 
 static void mark_iterator(s7_pointer p)
@@ -7584,9 +7584,9 @@ static int64_t gc(s7_scheme *sc)
 
   for (i = 1; i < NUM_SAFE_LISTS; i++) /* see tgen.scm -- we can't just check sc->current_safe_list */
     if ((is_pair(sc->safe_lists[i])) &&
-	(list_is_in_use(sc->safe_lists[i]))) /* safe_lists are semipermanent, so we have to mark contents by hand */
+        (list_is_in_use(sc->safe_lists[i]))) /* safe_lists are semipermanent, so we have to mark contents by hand */
       for (s7_pointer p = sc->safe_lists[i]; is_pair(p); p = cdr(p))
-	gc_mark(car(p));
+        gc_mark(car(p));
 
   for (i = 0; i < sc->setters_loc; i++)
     gc_mark(cdr(sc->setters[i]));
@@ -7599,7 +7599,7 @@ static int64_t gc(s7_scheme *sc)
     {
       set_mark(sc->rec_stack);
       for (i = 0; i < sc->rec_loc; i++)
-	gc_mark(sc->rec_els[i]);
+        gc_mark(sc->rec_els[i]);
     }
   mark_vector(sc->protected_objects);
   mark_vector(sc->protected_setters);
@@ -7627,17 +7627,17 @@ static int64_t gc(s7_scheme *sc)
     {
       profile_data_t *pd = sc->profile_data;
       for (i = 0; i < pd->top; i++)
-	if ((pd->funcs[i]) && (is_gensym(pd->funcs[i])))
-	  set_mark(pd->funcs[i]);
+        if ((pd->funcs[i]) && (is_gensym(pd->funcs[i])))
+          set_mark(pd->funcs[i]);
     }
 
   {
     gc_list_t *gp = sc->opt1_funcs;
     for (i = 0; i < gp->loc; i++)
       {
-	s7_pointer s1 = T_Pair(gp->list[i]);
-	if ((is_marked(s1)) && (!is_marked(opt1_any(s1)))) /* opt1_lambda, but op_unknown* can change to opt1_cfunc etc */
-	  gc_mark(opt1_any(s1));                           /* not set_mark -- need to protect let/body/args as well */
+        s7_pointer s1 = T_Pair(gp->list[i]);
+        if ((is_marked(s1)) && (!is_marked(opt1_any(s1)))) /* opt1_lambda, but op_unknown* can change to opt1_cfunc etc */
+          gc_mark(opt1_any(s1));                           /* not set_mark -- need to protect let/body/args as well */
       }}
 
   /* free up all unmarked objects */
@@ -7648,16 +7648,16 @@ static int64_t gc(s7_scheme *sc)
     s7_pointer *heap_top = (s7_pointer *)(sc->heap + sc->heap_size);
 
 #if S7_DEBUGGING
-  #define gc_object(Tp)							\
-    p = (*Tp++);							\
-    if (signed_type(p) > 0)						\
-      {								        \
-        p->debugger_bits = 0; p->gc_func = func; p->gc_line = line;	\
+  #define gc_object(Tp)                                                        \
+    p = (*Tp++);                                                        \
+    if (signed_type(p) > 0)                                                \
+      {                                                                        \
+        p->debugger_bits = 0; p->gc_func = func; p->gc_line = line;        \
         if (has_odd_bits(p)) {char *s; fprintf(stderr, "odd bits: %s\n", s = describe_type_bits(sc, p)); free(s);} \
-	if (!in_heap(p)) {char *s; fprintf(stderr, "not in heap: %s\n", s = describe_type_bits(sc, p)); free(s);} \
-        clear_type(p);							\
-        (*fp++) = p;							\
-      }									\
+        if (!in_heap(p)) {char *s; fprintf(stderr, "not in heap: %s\n", s = describe_type_bits(sc, p)); free(s);} \
+        clear_type(p);                                                        \
+        (*fp++) = p;                                                        \
+      }                                                                        \
     else if (signed_type(p) < 0) clear_mark(p);
 #else
   #define gc_object(Tp) p = (*Tp++); if (signed_type(p) > 0) {clear_type(p); (*fp++) = p;} else if (signed_type(p) < 0) clear_mark(p);
@@ -7671,11 +7671,11 @@ static int64_t gc(s7_scheme *sc)
 #endif
     while (tp < heap_top)          /* != here or ^ makes no difference, and going to 64 (from 32) doesn't matter */
       {
-	s7_pointer p;
-	LOOP_8(gc_object(tp));
-	LOOP_8(gc_object(tp));
-	LOOP_8(gc_object(tp));
-	LOOP_8(gc_object(tp));
+        s7_pointer p;
+        LOOP_8(gc_object(tp));
+        LOOP_8(gc_object(tp));
+        LOOP_8(gc_object(tp));
+        LOOP_8(gc_object(tp));
       }
     /* I tried using pthreads here, since there is no need for a lock in this loop, but the *fp++ part needs to
      *   be local to each thread, then merged at the end.  In my timing tests, the current version was faster.
@@ -7696,10 +7696,10 @@ static int64_t gc(s7_scheme *sc)
 #if (!MS_WINDOWS)
 #if S7_DEBUGGING
       s7_warn(sc, 512, "%s[%d]: gc freed %" ld64 "/%" ld64 " (free: %" p64 "), time: %f\n", func, line,
-	      sc->gc_freed, sc->heap_size, (intptr_t)(sc->free_heap_top - sc->free_heap), (double)(sc->gc_end - sc->gc_start) / ticks_per_second());
+              sc->gc_freed, sc->heap_size, (intptr_t)(sc->free_heap_top - sc->free_heap), (double)(sc->gc_end - sc->gc_start) / ticks_per_second());
 #else
       s7_warn(sc, 256, "gc freed %" ld64 "/%" ld64 " (free: %" p64 "), time: %f\n",
-	      sc->gc_freed, sc->heap_size, (intptr_t)(sc->free_heap_top - sc->free_heap), (double)(sc->gc_end - sc->gc_start) / ticks_per_second());
+              sc->gc_freed, sc->heap_size, (intptr_t)(sc->free_heap_top - sc->free_heap), (double)(sc->gc_end - sc->gc_start) / ticks_per_second());
 #endif
 #else
       s7_warn(sc, 256, "gc freed %" ld64 "/%" ld64 "\n", sc->gc_freed, sc->heap_size);
@@ -7709,8 +7709,8 @@ static int64_t gc(s7_scheme *sc)
     {
       s7_int num, len = vector_length(sc->protected_objects); /* allocated at startup */
       for (i = 0, num = 0; i < len; i++)
-	if (vector_element(sc->protected_objects, i) != sc->unused)
-	  num++;
+        if (vector_element(sc->protected_objects, i) != sc->unused)
+          num++;
       s7_warn(sc, 256, "gc-protected-objects: %" ld64 " in use of %" ld64 "\n", num, len);
     }
   sc->previous_free_heap_top = sc->free_heap_top;
@@ -7745,17 +7745,17 @@ static void resize_heap_to(s7_scheme *sc, int64_t size)
 #if (S7_DEBUGGING) && (!MS_WINDOWS)
   if (show_gc_stats(sc))
     s7_warn(sc, 512, "%s from %s[%d]: old: %" ld64 " / %" ld64 ", new: %" ld64 ", fraction: %.3f -> %" ld64 "\n",
-	    __func__, func, line, old_free, old_size, size, sc->gc_resize_heap_fraction, (int64_t)(floor(sc->heap_size * sc->gc_resize_heap_fraction)));
+            __func__, func, line, old_free, old_size, size, sc->gc_resize_heap_fraction, (int64_t)(floor(sc->heap_size * sc->gc_resize_heap_fraction)));
 #endif
 
   if (size == 0)
     {
       if ((old_free < old_size * sc->gc_resize_heap_by_4_fraction) &&
-	  (sc->max_heap_size > (sc->heap_size * 4)))
-	sc->heap_size *= 4;          /* *8 if < 1M (or whatever) doesn't make much difference */
+          (sc->max_heap_size > (sc->heap_size * 4)))
+        sc->heap_size *= 4;          /* *8 if < 1M (or whatever) doesn't make much difference */
       else sc->heap_size *= 2;
       if (sc->gc_resize_heap_fraction > .4)
-	sc->gc_resize_heap_fraction *= .95;
+        sc->gc_resize_heap_fraction *= .95;
     }
   else
     if (size > sc->heap_size)
@@ -7766,9 +7766,9 @@ static void resize_heap_to(s7_scheme *sc, int64_t size)
   if (((2 * sc->heap_size * sizeof(s7_cell *)) + ((sc->heap_size - old_size) * sizeof(s7_cell))) >= SIZE_MAX)
     { /* can this happen in 64-bit land?  SIZE_MAX is unsigned int in 32-bit, unsigned long in 64 bit = UINTPTR_MAX = 18446744073709551615UL */
       s7_warn(sc, 256, "heap size requested, %" ld64 " => %" ld64 " bytes, is greater than size_t: %u\n",
-	      sc->heap_size,
-	      (2 * sc->heap_size * sizeof(s7_cell *)) + ((sc->heap_size - old_size) * sizeof(s7_cell)),
-	      SIZE_MAX);
+              sc->heap_size,
+              (2 * sc->heap_size * sizeof(s7_cell *)) + ((sc->heap_size - old_size) * sizeof(s7_cell)),
+              SIZE_MAX);
       sc->heap_size = old_size + 64000;
     }
 #endif
@@ -7778,7 +7778,7 @@ static void resize_heap_to(s7_scheme *sc, int64_t size)
   else /* can this happen? */
     {
       s7_warn(sc, 256, "heap reallocation failed! tried to get %" ld64 " bytes (will retry with a smaller amount)\n",
-	      (int64_t)(sc->heap_size * sizeof(s7_cell *)));
+              (int64_t)(sc->heap_size * sizeof(s7_cell *)));
       sc->heap_size = old_size + 64000;
       sc->heap = (s7_cell **)Realloc(sc->heap, sc->heap_size * sizeof(s7_cell *));
     }
@@ -7792,10 +7792,10 @@ static void resize_heap_to(s7_scheme *sc, int64_t size)
     s7_pointer p = cells;
     for (int64_t k = old_size; k < sc->heap_size;)
       {
-	LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
-	LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
-	LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
-	LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
+        LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
+        LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
+        LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
+        LOOP_8(sc->heap[k++] = p; (*sc->free_heap_top++) = p++);
       }}
   hp = (heap_block_t *)Malloc(sizeof(heap_block_t));
   hp->start = (intptr_t)cells;
@@ -7808,16 +7808,16 @@ static void resize_heap_to(s7_scheme *sc, int64_t size)
   if (show_heap_stats(sc))
     {
       if (size != 0)
-	s7_warn(sc, 512, "heap grows to %" ld64 " (old free/size: %" ld64 "/%" ld64 ", requested %" ld64 ")\n",
-		sc->heap_size, old_free, old_size, size);
+        s7_warn(sc, 512, "heap grows to %" ld64 " (old free/size: %" ld64 "/%" ld64 ", requested %" ld64 ")\n",
+                sc->heap_size, old_free, old_size, size);
       else s7_warn(sc, 512, "heap grows to %" ld64 " (old free/size: %" ld64 "/%" ld64 ", %.3f)\n",
-		   sc->heap_size, old_free, old_size, sc->gc_resize_heap_fraction);
+                   sc->heap_size, old_free, old_size, sc->gc_resize_heap_fraction);
     }
   if (sc->heap_size >= sc->max_heap_size)
     error_nr(sc, make_symbol(sc, "heap-too-big", 12),
-	     set_elist_3(sc, wrap_string(sc, "heap has grown past (*s7* 'max-heap-size): ~D > ~D", 50),
-			 wrap_integer(sc, sc->max_heap_size),
-			 wrap_integer(sc, sc->heap_size)));
+             set_elist_3(sc, wrap_string(sc, "heap has grown past (*s7* 'max-heap-size): ~D > ~D", 50),
+                         wrap_integer(sc, sc->max_heap_size),
+                         wrap_integer(sc, sc->heap_size)));
 }
 
 
@@ -7837,14 +7837,14 @@ static void try_to_call_gc(s7_scheme *sc)
   else
     {
       if ((sc->gc_resize_heap_fraction > 0.5) && (sc->heap_size >= 4194304))
-	  sc->gc_resize_heap_fraction = 0.5;
+          sc->gc_resize_heap_fraction = 0.5;
 #if S7_DEBUGGING
       gc(sc, func, line); /* not call_gc! */
 #else
       gc(sc);
 #endif
       if ((int64_t)(sc->free_heap_top - sc->free_heap) < (sc->heap_size * sc->gc_resize_heap_fraction)) /* changed 21-Jul-22 */
-	resize_heap(sc);
+        resize_heap(sc);
     }
 }
   /* originally I tried to mark each temporary value until I was done with it, but that way madness lies... By delaying
@@ -7880,10 +7880,10 @@ Evaluation produces a surprising amount of garbage, so don't leave the GC off fo
   if (is_not_null(args))
     {
       if (!is_boolean(car(args)))
-	return(sole_arg_method_or_bust(sc, car(args), sc->gc_symbol, args, sc->type_names[T_BOOLEAN]));
+        return(sole_arg_method_or_bust(sc, car(args), sc->gc_symbol, args, sc->type_names[T_BOOLEAN]));
       sc->gc_off = (car(args) == sc->F);
       if (sc->gc_off)
-	return(sc->F);
+        return(sc->F);
     }
   call_gc(sc);
   return(sc->unspecified);
@@ -7911,7 +7911,7 @@ static void check_free_heap_size(s7_scheme *sc, s7_int size)
       gc(sc);
 #endif
       while ((sc->free_heap_top - sc->free_heap) < (s7_int)(size * 1.5))
-	resize_heap(sc);
+        resize_heap(sc);
     }
 }
 
@@ -7982,12 +7982,12 @@ static void free_cell(s7_scheme *sc, s7_pointer p)
   if ((t_any_closure_p[typ]) && (gp->loc > 0))
     for (s7_int i = 0; i < gp->loc; i++)
       if (gp->list[i] == p)
-	fprintf(stderr, "opt1_funcs free_cell of %s?\n", type_name_from_type(typ, NO_ARTICLE));
+        fprintf(stderr, "opt1_funcs free_cell of %s?\n", type_name_from_type(typ, NO_ARTICLE));
   gp = sc->weak_refs;
   if (gp->loc > 0)
     for (s7_int i = 0; i < gp->loc; i++)
       if (gp->list[i] == p)
-	fprintf(stderr, "weak refs free_cell of %s?\n", type_name_from_type(typ, NO_ARTICLE));
+        fprintf(stderr, "weak refs free_cell of %s?\n", type_name_from_type(typ, NO_ARTICLE));
 
   p->debugger_bits = 0;
   p->explicit_free_line = line;
@@ -8025,14 +8025,14 @@ static void remove_gensym_from_heap(s7_scheme *sc, s7_pointer x) /* x known to b
     gc_list_t *gp = sc->gensyms;
     for (s7_int i = 0; i < gp->loc; i++) /* sc->gensyms reaches size 512 during s7test, but this search is called 3 times and costs nothing */
       if (gp->list[i] == x)
-	{
-	  for (s7_int j = i + 1; i < gp->loc - 1; i++, j++)
-	    gp->list[i] = gp->list[j];
-	  gp->list[i] = NULL;
-	  gp->loc--;
-	  if (gp->loc == 0) mark_function[T_SYMBOL] = mark_noop;
-	  break;
-	}}
+        {
+          for (s7_int j = i + 1; i < gp->loc - 1; i++, j++)
+            gp->list[i] = gp->list[j];
+          gp->list[i] = NULL;
+          gp->loc--;
+          if (gp->loc == 0) mark_function[T_SYMBOL] = mark_noop;
+          break;
+        }}
 }
 
 static inline void remove_from_heap(s7_scheme *sc, s7_pointer x)
@@ -8043,9 +8043,9 @@ static inline void remove_from_heap(s7_scheme *sc, s7_pointer x)
     {
       s7_pointer p = x;
       do {
-	petrify(sc, p);
-	remove_from_heap(sc, car(p));
-	p = cdr(p);
+        petrify(sc, p);
+        remove_from_heap(sc, car(p));
+        p = cdr(p);
       } while (is_pair(p) && (in_heap(p)));
       if (in_heap(p)) petrify(sc, p);
       return;
@@ -8063,7 +8063,7 @@ static inline void remove_from_heap(s7_scheme *sc, s7_pointer x)
       return;
     case T_SYMBOL:
       if (is_gensym(x))
-	remove_gensym_from_heap(sc, x);
+        remove_gensym_from_heap(sc, x);
       return;
     case T_CLOSURE: case T_CLOSURE_STAR:
     case T_MACRO:   case T_MACRO_STAR:
@@ -8206,16 +8206,16 @@ static void push_stack_1(s7_scheme *sc, opcode_t op, s7_pointer args, s7_pointer
   if (sc->stack_end >= sc->stack_start + sc->stack_size)
     {
       fprintf(stderr, "%s%s[%d]: stack overflow, %u > %u, trigger: %u %s\n",
-	      bold_text, func, line,
-	      (uint32_t)((intptr_t)(sc->stack_end - sc->stack_start)), sc->stack_size,
-	      (uint32_t)((intptr_t)(sc->stack_resize_trigger - sc->stack_start)),
-	      unbold_text);
+              bold_text, func, line,
+              (uint32_t)((intptr_t)(sc->stack_end - sc->stack_start)), sc->stack_size,
+              (uint32_t)((intptr_t)(sc->stack_resize_trigger - sc->stack_start)),
+              unbold_text);
       s7_show_stack(sc);
       if (sc->stop_at_error) abort();
     }
   if (sc->stack_end >= sc->stack_resize_trigger)
     fprintf(stderr, "%s%s[%d] from %s: stack resize skipped, stack at %u of %u%s\n",
-	    bold_text, func, line, op_names[op], (uint32_t)((intptr_t)(sc->stack_end - sc->stack_start) / 4), sc->stack_size / 4, unbold_text);
+            bold_text, func, line, op_names[op], (uint32_t)((intptr_t)(sc->stack_end - sc->stack_start) / 4), sc->stack_size / 4, unbold_text);
   if (sc->stack_end != end)
     fprintf(stderr, "%s[%d]: stack changed in push_stack\n", func, line);
   if (op >= NUM_OPS)
@@ -8230,7 +8230,7 @@ static void push_stack_1(s7_scheme *sc, opcode_t op, s7_pointer args, s7_pointer
   sc->stack_end += 4;
 }
 
-#define push_stack(Sc, Op, Args, Code)	\
+#define push_stack(Sc, Op, Args, Code)        \
   do {s7_pointer *_end_; _end_ = Sc->stack_end; push_stack_1(Sc, Op, Args, Code, _end_, __func__, __LINE__);} while (0)
 
 #define push_stack_no_code(Sc, Op, Args)        push_stack(Sc, Op, Args, Sc->unused)
@@ -8293,7 +8293,7 @@ static void push_stack_1(s7_scheme *sc, opcode_t op, s7_pointer args, s7_pointer
 
 #define push_stack_no_args_direct(Sc, Op) \
   do { \
-      memcpy((void *)(Sc->stack_end), (void *)Sc, 2 * sizeof(s7_pointer));	\
+      memcpy((void *)(Sc->stack_end), (void *)Sc, 2 * sizeof(s7_pointer));        \
       stack_end_op(sc) = (s7_pointer)(opcode_t)(Op); \
       Sc->stack_end += 4; \
   } while (0)
@@ -8393,9 +8393,9 @@ static void resize_stack_1(s7_scheme *sc, const char *func, int line)
   if ((sc->stack_size * 2) > sc->max_stack_size)
     {
       fprintf(stderr, "%s%s[%d]: stack will be too big after resize, %u > %u, trigger: %" ld64 "%s\n",
-	      bold_text, func, line, sc->stack_size * 2, sc->max_stack_size,
-	      (s7_int)((intptr_t)(sc->stack_resize_trigger - sc->stack_start)),
-	      unbold_text);
+              bold_text, func, line, sc->stack_size * 2, sc->max_stack_size,
+              (s7_int)((intptr_t)(sc->stack_resize_trigger - sc->stack_start)),
+              unbold_text);
       s7_show_stack(sc);
       if (sc->stop_at_error) abort();
     }
@@ -8409,7 +8409,7 @@ static void resize_stack(s7_scheme *sc)
     s7_warn(sc, 128, "stack grows to %u\n", new_size);
   if (new_size > sc->max_stack_size)
     error_nr(sc, make_symbol(sc, "stack-too-big", 13),
-	     set_elist_1(sc, wrap_string(sc, "stack has grown past (*s7* 'max-stack-size)", 43)));
+             set_elist_1(sc, wrap_string(sc, "stack has grown past (*s7* 'max-stack-size)", 43)));
   /* error needs to follow realloc, else error -> catchers in error_nr -> let_temp* -> eval_done -> stack_resize -> infinite loop */
 }
 #endif
@@ -8543,8 +8543,8 @@ static /* inline */ s7_pointer new_symbol(s7_scheme *sc, const char *name, s7_in
       set_has_keyword(ksym);
       /* the keyword symbol needs to be semipermanent (not a gensym) else we have to laboriously gc-protect it */
       if ((is_gensym(ksym)) &&
-	  (in_heap(ksym)))
-	remove_gensym_from_heap(sc, ksym);
+          (in_heap(ksym)))
+        remove_gensym_from_heap(sc, ksym);
       slot = make_semipermanent_slot(sc, x, x);
       set_global_slot(x, slot);
       set_local_slot(x, slot);
@@ -8568,16 +8568,16 @@ static Inline s7_pointer inline_make_symbol(s7_scheme *sc, const char *name, s7_
   if (len <= 8)
     {
       for (s7_pointer x = vector_element(sc->symbol_table, location); is_pair(x); x = cdr(x))
-	if ((hash == pair_raw_hash(x)) &&
-	    ((uint64_t)len == pair_raw_len(x)))
-	  return(car(x));
+        if ((hash == pair_raw_hash(x)) &&
+            ((uint64_t)len == pair_raw_len(x)))
+          return(car(x));
     }
   else /* checking name[len=='\0' and using strcmp if so was not a big win */
     for (s7_pointer x = vector_element(sc->symbol_table, location); is_pair(x); x = cdr(x))
       if ((hash == pair_raw_hash(x)) &&
-	  ((uint64_t)len == pair_raw_len(x)) &&
-	  (strings_are_equal_with_length(name, pair_raw_name(x), len))) /* length here because name might not be null-terminated */
-	return(car(x));
+          ((uint64_t)len == pair_raw_len(x)) &&
+          (strings_are_equal_with_length(name, pair_raw_name(x), len))) /* length here because name might not be null-terminated */
+        return(car(x));
   return(new_symbol(sc, name, len, hash, location));
 }
 
@@ -8589,7 +8589,7 @@ static s7_pointer symbol_table_find_by_name(s7_scheme *sc, const char *name, uin
 {
   for (s7_pointer x = vector_element(sc->symbol_table, location); is_not_null(x); x = cdr(x))
     if ((hash == pair_raw_hash(x)) &&
-	(strings_are_equal_with_length(name, pair_raw_name(x), len)))
+        (strings_are_equal_with_length(name, pair_raw_name(x), len)))
       return(car(x));
   return(sc->nil);
 }
@@ -8627,8 +8627,8 @@ static s7_pointer g_symbol_table(s7_scheme *sc, s7_pointer unused_args)
       syms++;
   if (syms > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "symbol-table size, ~D, is greater than (*s7* 'max-vector-length), ~D", 68),
-			 wrap_integer(sc, syms), wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "symbol-table size, ~D, is greater than (*s7* 'max-vector-length), ~D", 68),
+                         wrap_integer(sc, syms), wrap_integer(sc, sc->max_vector_length)));
   sc->w = make_simple_vector(sc, syms);
   set_is_symbol_table(sc->w);
   els = vector_elements(sc->w);
@@ -8646,11 +8646,11 @@ bool s7_for_each_symbol_name(s7_scheme *sc, bool (*symbol_func)(const char *symb
   for (int32_t i = 0; i < SYMBOL_TABLE_SIZE; i++)
     for (s7_pointer x = vector_element(sc->symbol_table, i); is_not_null(x); x = cdr(x))
       if (symbol_func(symbol_name(car(x)), data))
-	return(true);
+        return(true);
   return((symbol_func("#t", data))             || (symbol_func("#f", data))             ||
-	 (symbol_func("#<unspecified>", data)) || (symbol_func("#<undefined>", data))   ||
-	 (symbol_func("#<eof>", data))         ||
-	 (symbol_func("#true", data))          || (symbol_func("#false", data)));
+         (symbol_func("#<unspecified>", data)) || (symbol_func("#<undefined>", data))   ||
+         (symbol_func("#<eof>", data))         ||
+         (symbol_func("#true", data))          || (symbol_func("#false", data)));
 }
 
 bool s7_for_each_symbol(s7_scheme *sc, bool (*symbol_func)(const char *symbol_name, void *data), void *data)
@@ -8658,7 +8658,7 @@ bool s7_for_each_symbol(s7_scheme *sc, bool (*symbol_func)(const char *symbol_na
   for (int32_t i = 0; i < SYMBOL_TABLE_SIZE; i++)
     for (s7_pointer x = vector_element(sc->symbol_table, i); is_not_null(x); x = cdr(x))
       if (symbol_func(symbol_name(car(x)), data))
-	return(true);
+        return(true);
   return(false);
 }
 
@@ -8675,10 +8675,10 @@ static void remove_gensym_from_symbol_table(s7_scheme *sc, s7_pointer sym)
   else
     for (s7_pointer y = x, z = cdr(x); is_pair(z); y = z, z = cdr(z))
       if (car(z) == sym)
-	{
-	  unchecked_set_cdr(y, cdr(z));
-	  return;
-	}
+        {
+          unchecked_set_cdr(y, cdr(z));
+          return;
+        }
 }
 
 s7_pointer s7_gensym(s7_scheme *sc, const char *prefix)
@@ -8725,7 +8725,7 @@ static s7_pointer g_gensym(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer gname = car(args);
       if (!is_string(gname))
-	return(sole_arg_method_or_bust(sc, gname, sc->gensym_symbol, args, sc->type_names[T_STRING]));
+        return(sole_arg_method_or_bust(sc, gname, sc->gensym_symbol, args, sc->type_names[T_STRING]));
       prefix = string_value(gname);
       plen = string_length(gname); /* was safe_strlen(prefix): were we stopping at #\null deliberately? */
     }
@@ -8758,7 +8758,7 @@ static s7_pointer g_gensym(s7_scheme *sc, s7_pointer args)
       location = hash % SYMBOL_TABLE_SIZE;
       if (is_null(symbol_table_find_by_name(sc, name, hash, location, nlen))) break;
       if (sc->safety > NO_SAFETY)
-	s7_warn(sc, nlen + 25, "%s collides with gensym?\n", name);
+        s7_warn(sc, nlen + 25, "%s collides with gensym?\n", name);
     }
 
   /* make-string for symbol name */
@@ -8853,8 +8853,8 @@ static s7_pointer g_symbol_to_string(s7_scheme *sc, s7_pointer args)
   /* s7_make_string uses strlen which stops at an embedded null */
   if (symbol_name_length(sym) > sc->max_string_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "symbol->string symbol name is too large: (> ~D ~D) (*s7* 'max-string-length)", 76),
-			 wrap_integer(sc, symbol_name_length(sym)), wrap_integer(sc, sc->max_string_length)));
+             set_elist_3(sc, wrap_string(sc, "symbol->string symbol name is too large: (> ~D ~D) (*s7* 'max-string-length)", 76),
+                         wrap_integer(sc, symbol_name_length(sym)), wrap_integer(sc, sc->max_string_length)));
   return(inline_make_string_with_length(sc, symbol_name(sym), symbol_name_length(sym)));    /* return a copy */
 }
 
@@ -8938,7 +8938,7 @@ static s7_pointer g_symbol(s7_scheme *sc, s7_pointer args)
   if (is_pair(p))
     {
       if (is_null(cdr(args)))
-	return(mark_as_symbol_from_symbol(g_string_to_symbol_1(sc, car(args), sc->symbol_symbol)));
+        return(mark_as_symbol_from_symbol(g_string_to_symbol_1(sc, car(args), sc->symbol_symbol)));
       return(mark_as_symbol_from_symbol(g_string_to_symbol_1(sc, g_string_append_1(sc, args, sc->symbol_symbol), sc->symbol_symbol)));
     }
   if (len == 0)
@@ -8951,10 +8951,10 @@ static s7_pointer g_symbol(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer str = car(p);
       if (string_length(str) > 0)
-	{
-	  memcpy((void *)(name + cur_len), (void *)string_value(str), string_length(str));
-	  cur_len += string_length(str);
-	}}
+        {
+          memcpy((void *)(name + cur_len), (void *)string_value(str), string_length(str));
+          cur_len += string_length(str);
+        }}
   name[len] = '\0';
   sym = mark_as_symbol_from_symbol(inline_make_symbol(sc, name, len));
   liberate(sc, b);
@@ -9029,7 +9029,7 @@ static s7_pointer make_let_with_slot(s7_scheme *sc, s7_pointer old_let, s7_point
 }
 
 static Inline s7_pointer inline_make_let_with_two_slots(s7_scheme *sc, s7_pointer old_let,
-							s7_pointer symbol1, s7_pointer value1, s7_pointer symbol2, s7_pointer value2)
+                                                        s7_pointer symbol1, s7_pointer value1, s7_pointer symbol2, s7_pointer value2)
 {
   /* we leave value1/value2 computation order to the C compiler here -- in the old macro, it was explicitly value1 then value2
    *   this means any let in old scheme code that actually depends on the order may break -- it should be let*.
@@ -9274,7 +9274,7 @@ static inline s7_pointer checked_slot_set_value(s7_scheme *sc, s7_pointer y, s7_
   else
     {
       if (is_immutable_slot(y))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_set_symbol, slot_symbol(y)));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_set_symbol, slot_symbol(y)));
       slot_set_value(y, value);
     }
   return(slot_value(y));
@@ -9316,10 +9316,10 @@ static s7_int let_length(s7_scheme *sc, s7_pointer e)
     {
       s7_pointer length_func = find_method(sc, e, sc->length_symbol);
       if (length_func != sc->undefined)
-	{
-	  p = s7_apply_function(sc, length_func, set_plist_1(sc, e));
-	  return((s7_is_integer(p)) ? s7_integer(p) : -1); /* ?? */
-	}}
+        {
+          p = s7_apply_function(sc, length_func, set_plist_1(sc, e));
+          return((s7_is_integer(p)) ? s7_integer(p) : -1); /* ?? */
+        }}
   for (i = 0, p = let_slots(e); tis_slot(p); i++, p = next_slot(p));
   return(i);
 }
@@ -9350,8 +9350,8 @@ static void remove_let_from_heap(s7_scheme *sc, s7_pointer lt)
     {
       s7_pointer val = slot_value(p);
       if ((has_closure_let(val)) &&
-	  (in_heap(closure_args(val))))
-	remove_function_from_heap(sc, val);
+          (in_heap(closure_args(val))))
+        remove_function_from_heap(sc, val);
     }
   let_set_removed(lt);
 }
@@ -9374,12 +9374,12 @@ static void remove_function_from_heap(s7_scheme *sc, s7_pointer value)
     {
       lt = let_outlet(lt);
       if ((is_let(lt)) && (!let_removed(lt)) && (lt != sc->shadow_rootlet))
-	{
-	  remove_let_from_heap(sc, lt);
-	  lt = let_outlet(lt);
-	  if ((is_let(lt)) && (!let_removed(lt)) && (lt != sc->shadow_rootlet))
-	    remove_let_from_heap(sc, lt);
-	}}
+        {
+          remove_let_from_heap(sc, lt);
+          lt = let_outlet(lt);
+          if ((is_let(lt)) && (!let_removed(lt)) && (lt != sc->shadow_rootlet))
+            remove_let_from_heap(sc, lt);
+        }}
 }
 
 s7_pointer s7_make_slot(s7_scheme *sc, s7_pointer let, s7_pointer symbol, s7_pointer value)
@@ -9389,56 +9389,56 @@ s7_pointer s7_make_slot(s7_scheme *sc, s7_pointer let, s7_pointer symbol, s7_poi
     {
       s7_pointer slot;
       if (is_immutable(sc->rootlet))
-	immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't define '~S; rootlet is immutable", 38), symbol));
+        immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't define '~S; rootlet is immutable", 38), symbol));
       if ((sc->safety <= NO_SAFETY) &&
-	  (has_closure_let(value)))
-	remove_function_from_heap(sc, value); /* optimization of access pointers happens later so presumably this is safe */
+          (has_closure_let(value)))
+        remove_function_from_heap(sc, value); /* optimization of access pointers happens later so presumably this is safe */
 
       /* first look for existing slot -- this is not always checked before calling s7_make_slot */
       if (is_slot(global_slot(symbol)))
-	{
-	  slot = global_slot(symbol);
-	  if (is_immutable_slot(slot))     /* 2-Oct-23: (immutable! 'abs) (set! abs 3) */
-	    immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->set_symbol, symbol));
-	  symbol_increment_ctr(symbol);
-	  slot_set_value_with_hook(slot, value);
-	  return(slot);
-	}
+        {
+          slot = global_slot(symbol);
+          if (is_immutable_slot(slot))     /* 2-Oct-23: (immutable! 'abs) (set! abs 3) */
+            immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->set_symbol, symbol));
+          symbol_increment_ctr(symbol);
+          slot_set_value_with_hook(slot, value);
+          return(slot);
+        }
 
       slot = make_semipermanent_slot(sc, symbol, value);
       add_slot_to_rootlet(sc, slot);
       set_global_slot(symbol, slot);
       if (symbol_id(symbol) == 0)         /* never defined locally? */
-	{
-	  if ((!is_gensym(symbol)) &&
-	      (initial_slot(symbol) == sc->undefined) &&
-	      (!in_heap(value)) &&         /* else initial_slot value can be GC'd if symbol set! (initial != global, initial unprotected) */
-	       ((!sc->string_signature) || /* from init_signatures -- maybe need a boolean for this */
-	       (is_c_function(value))))    /* || (is_syntax(value)) -- we need 'else as a special case? */
-	    /* the string_signature business means only the initial rootlet c_functions take part in unlet.  It would be neat if any
-	     *   cload library's c_functions could be there as well, but then (unlet) needs to know which envs are in the chain.
-	     *   The current shadow_rootlet could be saved in each initial_slot, these could be marked in some way, then the chain
-	     *   searched in (unlet) to get the currently active envs -- maybe too complex?  We could also provide a way to overrule
-	     *   the string_signature check, but then symbol collisions would probably be resolved as the last loaded (which might not
-	     *   be in the active chain).
-	     * Also, the c_function check is overly paranoid -- all we need is that the value is semipermanent (T_UNHEAP?).
-	     */
-	    {
-	      set_initial_slot(symbol, make_semipermanent_slot(sc, symbol, value));
-	      if ((!sc->string_signature) && ((is_c_function(value)) || (is_syntax(value)))) /* syntax probably can't happen here (handled explicitly in syntax procedure) */
-		{
-		  /* non-c_functions that are not set! (and therefore initial_slot GC) protected by default: make-hook hook-functions
-		   *   if these initial_slot values are added to unlet, they need explicit GC protection.
-		   */
-		  slot_set_next(initial_slot(symbol), sc->unlet_slots);
-		  sc->unlet_slots = initial_slot(symbol);
-		}}
-	  set_local_slot(symbol, slot);
-	  set_global(symbol);
-	}
+        {
+          if ((!is_gensym(symbol)) &&
+              (initial_slot(symbol) == sc->undefined) &&
+              (!in_heap(value)) &&         /* else initial_slot value can be GC'd if symbol set! (initial != global, initial unprotected) */
+               ((!sc->string_signature) || /* from init_signatures -- maybe need a boolean for this */
+               (is_c_function(value))))    /* || (is_syntax(value)) -- we need 'else as a special case? */
+            /* the string_signature business means only the initial rootlet c_functions take part in unlet.  It would be neat if any
+             *   cload library's c_functions could be there as well, but then (unlet) needs to know which envs are in the chain.
+             *   The current shadow_rootlet could be saved in each initial_slot, these could be marked in some way, then the chain
+             *   searched in (unlet) to get the currently active envs -- maybe too complex?  We could also provide a way to overrule
+             *   the string_signature check, but then symbol collisions would probably be resolved as the last loaded (which might not
+             *   be in the active chain).
+             * Also, the c_function check is overly paranoid -- all we need is that the value is semipermanent (T_UNHEAP?).
+             */
+            {
+              set_initial_slot(symbol, make_semipermanent_slot(sc, symbol, value));
+              if ((!sc->string_signature) && ((is_c_function(value)) || (is_syntax(value)))) /* syntax probably can't happen here (handled explicitly in syntax procedure) */
+                {
+                  /* non-c_functions that are not set! (and therefore initial_slot GC) protected by default: make-hook hook-functions
+                   *   if these initial_slot values are added to unlet, they need explicit GC protection.
+                   */
+                  slot_set_next(initial_slot(symbol), sc->unlet_slots);
+                  sc->unlet_slots = initial_slot(symbol);
+                }}
+          set_local_slot(symbol, slot);
+          set_global(symbol);
+        }
       symbol_increment_ctr(symbol);
       if (is_gensym(symbol))
-	remove_gensym_from_heap(sc, symbol);
+        remove_gensym_from_heap(sc, symbol);
       return(slot);
     }
   return(add_slot_checked_with_id(sc, let, symbol, value));
@@ -9498,9 +9498,9 @@ static s7_pointer g_unlet(s7_scheme *sc, s7_pointer unused_args)
       s7_pointer sym = slot_symbol(p);
       s7_pointer x = slot_value(p);
       if ((x != global_value(sym)) ||  /* it has been changed globally */
-	  ((!is_global(sym)) &&        /* it might be shadowed locally */
-	   (s7_symbol_local_value(sc, sym, sc->curlet) != global_value(sym))))
-	add_slot_checked_with_id(sc, sc->w, sym, x);
+          ((!is_global(sym)) &&        /* it might be shadowed locally */
+           (s7_symbol_local_value(sc, sym, sc->curlet) != global_value(sym))))
+        add_slot_checked_with_id(sc, sc->w, sym, x);
     }
   res = sc->w;
   sc->w = sc->unused;
@@ -9590,29 +9590,29 @@ static void append_let(s7_scheme *sc, s7_pointer new_e, s7_pointer old_e)
   if (new_e == sc->rootlet)
     for (s7_pointer x = let_slots(old_e); tis_slot(x); x = next_slot(x))
       {
-	s7_pointer sym = slot_symbol(x), val = slot_value(x);
-	if (is_slot(global_slot(sym)))
-	  slot_set_value(global_slot(sym), val);
-	else s7_make_slot(sc, sc->rootlet, sym, val);
+        s7_pointer sym = slot_symbol(x), val = slot_value(x);
+        if (is_slot(global_slot(sym)))
+          slot_set_value(global_slot(sym), val);
+        else s7_make_slot(sc, sc->rootlet, sym, val);
       }
   else
     if (old_e == sc->s7_starlet)
       {
-	s7_pointer iter = s7_make_iterator(sc, sc->s7_starlet);
-	s7_int gc_loc = gc_protect_1(sc, iter);
-	iterator_current(iter) = cons_unchecked(sc, sc->F, sc->F);
-	set_mark_seq(iter); /* so carrier is GC protected by mark_iterator */
-	while (true)
-	  {
-	    s7_pointer y = s7_iterate(sc, iter);
-	    if (iterator_is_at_end(iter)) break;
-	    add_slot_checked_with_id(sc, new_e, car(y), cdr(y));
-	  }
-	s7_gc_unprotect_at(sc, gc_loc);
+        s7_pointer iter = s7_make_iterator(sc, sc->s7_starlet);
+        s7_int gc_loc = gc_protect_1(sc, iter);
+        iterator_current(iter) = cons_unchecked(sc, sc->F, sc->F);
+        set_mark_seq(iter); /* so carrier is GC protected by mark_iterator */
+        while (true)
+          {
+            s7_pointer y = s7_iterate(sc, iter);
+            if (iterator_is_at_end(iter)) break;
+            add_slot_checked_with_id(sc, new_e, car(y), cdr(y));
+          }
+        s7_gc_unprotect_at(sc, gc_loc);
       }
     else
       for (s7_pointer x = let_slots(old_e); tis_slot(x); x = next_slot(x))
-	add_slot_checked_with_id(sc, new_e, slot_symbol(x), slot_value(x)); /* not add_slot here because we might run off the free heap end */
+        add_slot_checked_with_id(sc, new_e, slot_symbol(x), slot_value(x)); /* not add_slot here because we might run off the free heap end */
 }
 
 static s7_pointer check_c_object_let(s7_scheme *sc, s7_pointer old_e, s7_pointer caller)
@@ -9638,7 +9638,7 @@ s7_pointer s7_varlet(s7_scheme *sc, s7_pointer let, s7_pointer symbol, s7_pointe
   if (let == sc->rootlet)
     {
       if (is_slot(global_slot(symbol)))
-	slot_set_value(global_slot(symbol), value);
+        slot_set_value(global_slot(symbol), value);
       else s7_make_slot(sc, sc->rootlet, symbol, value);
     }
   else
@@ -9672,61 +9672,61 @@ to the let target-let, and returns target-let.  (varlet (curlet) 'a 1) adds 'a t
     {
       check_method(sc, e, sc->varlet_symbol, args);
       if (!is_let(e))
-	wrong_type_error_nr(sc, sc->varlet_symbol, 1, e, a_let_string);
+        wrong_type_error_nr(sc, sc->varlet_symbol, 1, e, a_let_string);
       if ((is_immutable_let(e)) || (e == sc->s7_starlet))
-	immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't (varlet ~{~S~^ ~}), ~S is immutable", 41), args, e));
+        immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't (varlet ~{~S~^ ~}), ~S is immutable", 41), args, e));
     }
   for (s7_pointer x = cdr(args); is_pair(x); x = cdr(x))
     {
       s7_pointer sym, val, p = car(x);
       switch (type(p))
-	{
-	case T_SYMBOL:
-	  sym = (is_keyword(p)) ? keyword_symbol(p) : p;
-	  if (!is_pair(cdr(x)))
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_3(sc, wrap_string(sc, "varlet: symbol ~S, but no value: ~S", 35), p, args));
-	  if (is_constant_symbol(sc, sym))
-	    wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), sym, a_non_constant_symbol_string);
-	  x = cdr(x);
-	  val = car(x);
-	  break;
-
-	case T_PAIR:
-	  sym = car(p);
-	  if (!is_symbol(sym))
-	    wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), p, a_symbol_string);
-	  if (is_constant_symbol(sc, sym))
-	    wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), sym, a_non_constant_symbol_string);
-	  val = cdr(p);
-	  break;
-
-	case T_LET: /* (varlet (inlet 'a 1) (rootlet)) is trouble */
-	  if ((p == sc->rootlet) || (e == sc->s7_starlet)) continue;
-	  append_let(sc, e, check_c_object_let(sc, p, sc->varlet_symbol));
-	  if (has_let_set_fallback(p)) set_has_let_set_fallback(e);
-	  if (has_let_ref_fallback(p)) set_has_let_ref_fallback(e);
-	  continue;
-
-	default:
-	  wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), p, a_symbol_string);
-	}
+        {
+        case T_SYMBOL:
+          sym = (is_keyword(p)) ? keyword_symbol(p) : p;
+          if (!is_pair(cdr(x)))
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_3(sc, wrap_string(sc, "varlet: symbol ~S, but no value: ~S", 35), p, args));
+          if (is_constant_symbol(sc, sym))
+            wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), sym, a_non_constant_symbol_string);
+          x = cdr(x);
+          val = car(x);
+          break;
+
+        case T_PAIR:
+          sym = car(p);
+          if (!is_symbol(sym))
+            wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), p, a_symbol_string);
+          if (is_constant_symbol(sc, sym))
+            wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), sym, a_non_constant_symbol_string);
+          val = cdr(p);
+          break;
+
+        case T_LET: /* (varlet (inlet 'a 1) (rootlet)) is trouble */
+          if ((p == sc->rootlet) || (e == sc->s7_starlet)) continue;
+          append_let(sc, e, check_c_object_let(sc, p, sc->varlet_symbol));
+          if (has_let_set_fallback(p)) set_has_let_set_fallback(e);
+          if (has_let_ref_fallback(p)) set_has_let_ref_fallback(e);
+          continue;
+
+        default:
+          wrong_type_error_nr(sc, sc->varlet_symbol, position_of(x, args), p, a_symbol_string);
+        }
       if (e == sc->rootlet)
-	{
-	  s7_pointer gslot = global_slot(sym);
-	  if (is_slot(gslot))
-	    {
-	      if (is_immutable(gslot)) /* (immutable! 'abs) (varlet (rootlet) 'abs 1) */
-		immutable_object_error_nr(sc, set_elist_5(sc, wrap_string(sc, "~S is immutable in (varlet ~S '~S ~S)", 37), sym, car(args), p, val));
-	      slot_set_value_with_hook(global_slot(sym), val);
-	    }
-	  else s7_make_slot(sc, sc->rootlet, sym, val);
-	}
+        {
+          s7_pointer gslot = global_slot(sym);
+          if (is_slot(gslot))
+            {
+              if (is_immutable(gslot)) /* (immutable! 'abs) (varlet (rootlet) 'abs 1) */
+                immutable_object_error_nr(sc, set_elist_5(sc, wrap_string(sc, "~S is immutable in (varlet ~S '~S ~S)", 37), sym, car(args), p, val));
+              slot_set_value_with_hook(global_slot(sym), val);
+            }
+          else s7_make_slot(sc, sc->rootlet, sym, val);
+        }
       else
-	{
-	  check_let_fallback(sc, sym, e);
-	  add_slot_checked_with_id(sc, e, sym, val);
-	}}
+        {
+          check_let_fallback(sc, sym, e);
+          add_slot_checked_with_id(sc, e, sym, val);
+        }}
       /* this used to check for sym already defined, and set its value, but that greatly slows down
        *   the most common use (adding a slot), and makes it hard to shadow explicitly.  Don't use
        *   varlet as a substitute for set!/let-set!.
@@ -9749,9 +9749,9 @@ static s7_pointer g_cutlet(s7_scheme *sc, s7_pointer args)
     {
       check_method(sc, e, sc->cutlet_symbol, args);
       if (!is_let(e))
-	wrong_type_error_nr(sc, sc->cutlet_symbol, 1, e, a_let_string);
+        wrong_type_error_nr(sc, sc->cutlet_symbol, 1, e, a_let_string);
       if ((is_immutable_let(e)) || (e == sc->s7_starlet))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, e));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, e));
     }
   /* besides removing the slot we have to make sure the symbol_id does not match else
    *   let-ref and others will use the old slot!  What's the un-id?  Perhaps the next one?
@@ -9764,49 +9764,49 @@ static s7_pointer g_cutlet(s7_scheme *sc, s7_pointer args)
       s7_pointer sym = car(syms);
 
       if (!is_symbol(sym))
-	wrong_type_error_nr(sc, sc->cutlet_symbol, position_of(syms, args), sym, a_symbol_string);
+        wrong_type_error_nr(sc, sc->cutlet_symbol, position_of(syms, args), sym, a_symbol_string);
       if (is_keyword(sym))
-	sym = keyword_symbol(sym);
+        sym = keyword_symbol(sym);
 
       if (e == sc->rootlet)
-	{
-	  if (!is_slot(global_slot(sym)))
-	    error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "cutlet can't remove ~S", 22), sym));
-	  if (is_immutable(global_slot(sym)))
-	    immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, sym));
-	  symbol_set_id(sym, the_un_id);
-	  slot_set_value(global_slot(sym), sc->undefined);
-	  /* here we need to at least clear bits: syntactic binder clean-symbol(?) etc, maybe also locally */
-	}
+        {
+          if (!is_slot(global_slot(sym)))
+            error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "cutlet can't remove ~S", 22), sym));
+          if (is_immutable(global_slot(sym)))
+            immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, sym));
+          symbol_set_id(sym, the_un_id);
+          slot_set_value(global_slot(sym), sc->undefined);
+          /* here we need to at least clear bits: syntactic binder clean-symbol(?) etc, maybe also locally */
+        }
       else
-	{
-	  s7_pointer slot;
-	  if ((has_let_fallback(e)) &&
-	      ((sym == sc->let_ref_fallback_symbol) || (sym == sc->let_set_fallback_symbol)))
-	    error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "cutlet can't remove ~S", 22), sym));
-
-	  slot = let_slots(e);
-	  if (tis_slot(slot))
-	    {
-	      if (slot_symbol(slot) == sym)
-		{
-		  if (is_immutable_slot(slot))
-		    immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, sym));
-		  let_set_slots(e, next_slot(let_slots(e)));
-		  symbol_set_id(sym, the_un_id);
-		}
-	      else
-		{
-		  s7_pointer last_slot = slot;
-		  for (slot = next_slot(let_slots(e)); tis_slot(slot); last_slot = slot, slot = next_slot(slot))
-		    if (slot_symbol(slot) == sym)
-		      {
-			if (is_immutable_slot(slot))
-			  immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, sym));
-			symbol_set_id(sym, the_un_id);
-			slot_set_next(last_slot, next_slot(slot));
-			break;
-		      }}}}}
+        {
+          s7_pointer slot;
+          if ((has_let_fallback(e)) &&
+              ((sym == sc->let_ref_fallback_symbol) || (sym == sc->let_set_fallback_symbol)))
+            error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "cutlet can't remove ~S", 22), sym));
+
+          slot = let_slots(e);
+          if (tis_slot(slot))
+            {
+              if (slot_symbol(slot) == sym)
+                {
+                  if (is_immutable_slot(slot))
+                    immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, sym));
+                  let_set_slots(e, next_slot(let_slots(e)));
+                  symbol_set_id(sym, the_un_id);
+                }
+              else
+                {
+                  s7_pointer last_slot = slot;
+                  for (slot = next_slot(let_slots(e)); tis_slot(slot); last_slot = slot, slot = next_slot(slot))
+                    if (slot_symbol(slot) == sym)
+                      {
+                        if (is_immutable_slot(slot))
+                          immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->cutlet_symbol, sym));
+                        symbol_set_id(sym, the_un_id);
+                        slot_set_next(last_slot, next_slot(slot));
+                        break;
+                      }}}}}
   return(e);
 }
 
@@ -9824,59 +9824,59 @@ static s7_pointer sublet_1(s7_scheme *sc, s7_pointer e, s7_pointer bindings, s7_
       s7_pointer sp = NULL;
       sc->temp3 = new_e;
       for (s7_pointer x = bindings; is_pair(x); x = cdr(x))
-	{
-	  s7_pointer p = car(x), sym, val;
-
-	  switch (type(p))
-	    {
-	    case T_SYMBOL:
-	      sym = (is_keyword(p)) ? keyword_symbol(p) : p;
-	      if (!is_pair(cdr(x)))
-		error_nr(sc, sc->syntax_error_symbol,
-			 set_elist_4(sc, wrap_string(sc, "~A: entry ~S, but no value: ~S", 30), caller, p, bindings));
-	      x = cdr(x);
-	      val = car(x);
-	      break;
-
-	    case T_PAIR:
-	      sym = car(p);
-	      if (!is_symbol(sym))
-		wrong_type_error_nr(sc, caller, 1 + position_of(x, bindings), p, a_symbol_string);
-	      if (is_keyword(sym))
-		sym = keyword_symbol(sym);
-	      val = cdr(p);
-	      break;
-
-	    case T_LET:
-	      if ((p == sc->rootlet) || (new_e == sc->s7_starlet)) continue;
-	      append_let(sc, new_e, check_c_object_let(sc, p, caller));
-	      if (tis_slot(let_slots(new_e))) /* make sure the end slot (sp) is correct */
-		for (sp = let_slots(new_e); tis_slot(next_slot(sp)); sp = next_slot(sp));
-	      continue;
-
-	    default:
-	      wrong_type_error_nr(sc, caller, 1 + position_of(x, bindings), p, a_symbol_string);
-	    }
-
-	  if (is_constant_symbol(sc, sym))
-	    wrong_type_error_nr(sc, caller, 1 + position_of(x, bindings), sym, a_non_constant_symbol_string);
+        {
+          s7_pointer p = car(x), sym, val;
+
+          switch (type(p))
+            {
+            case T_SYMBOL:
+              sym = (is_keyword(p)) ? keyword_symbol(p) : p;
+              if (!is_pair(cdr(x)))
+                error_nr(sc, sc->syntax_error_symbol,
+                         set_elist_4(sc, wrap_string(sc, "~A: entry ~S, but no value: ~S", 30), caller, p, bindings));
+              x = cdr(x);
+              val = car(x);
+              break;
+
+            case T_PAIR:
+              sym = car(p);
+              if (!is_symbol(sym))
+                wrong_type_error_nr(sc, caller, 1 + position_of(x, bindings), p, a_symbol_string);
+              if (is_keyword(sym))
+                sym = keyword_symbol(sym);
+              val = cdr(p);
+              break;
+
+            case T_LET:
+              if ((p == sc->rootlet) || (new_e == sc->s7_starlet)) continue;
+              append_let(sc, new_e, check_c_object_let(sc, p, caller));
+              if (tis_slot(let_slots(new_e))) /* make sure the end slot (sp) is correct */
+                for (sp = let_slots(new_e); tis_slot(next_slot(sp)); sp = next_slot(sp));
+              continue;
+
+            default:
+              wrong_type_error_nr(sc, caller, 1 + position_of(x, bindings), p, a_symbol_string);
+            }
+
+          if (is_constant_symbol(sc, sym))
+            wrong_type_error_nr(sc, caller, 1 + position_of(x, bindings), sym, a_non_constant_symbol_string);
 #if 0
-	  if ((is_slot(global_slot(sym))) &&
-	      (is_syntax_or_qq(global_value(sym))))
-	    wrong_type_error_nr(sc, caller, 2, sym, wrap_string(sc, "a non-syntactic symbol", 22));
-	  /* this is a local redefinition which we accept elsewhere: (let ((if 3)) if) -> 3 */
-#endif
-	  /* here we know new_e is a let and is not rootlet */
-	  if (!sp)
-	    sp = add_slot_checked_with_id(sc, new_e, sym, val);
-	  else
-	    {
-	      if (sc->free_heap_top <= sc->free_heap_trigger) try_to_call_gc(sc); /* or maybe add add_slot_at_end_checked? */
-	      sp = inline_add_slot_at_end(sc, let_id(new_e), sp, sym, val);
-	      set_local(sym); /* ? */
-	    }
-	  check_let_fallback(sc, sym, new_e);
-	}
+          if ((is_slot(global_slot(sym))) &&
+              (is_syntax_or_qq(global_value(sym))))
+            wrong_type_error_nr(sc, caller, 2, sym, wrap_string(sc, "a non-syntactic symbol", 22));
+          /* this is a local redefinition which we accept elsewhere: (let ((if 3)) if) -> 3 */
+#endif
+          /* here we know new_e is a let and is not rootlet */
+          if (!sp)
+            sp = add_slot_checked_with_id(sc, new_e, sym, val);
+          else
+            {
+              if (sc->free_heap_top <= sc->free_heap_trigger) try_to_call_gc(sc); /* or maybe add add_slot_at_end_checked? */
+              sp = inline_add_slot_at_end(sc, let_id(new_e), sp, sym, val);
+              set_local(sym); /* ? */
+            }
+          check_let_fallback(sc, sym, new_e);
+        }
       sc->temp3 = sc->unused;
     }
   return(new_e);
@@ -9895,9 +9895,9 @@ static s7_pointer g_sublet(s7_scheme *sc, s7_pointer args)
   else
     if (e != sc->rootlet)
       {
-	check_method(sc, e, sc->sublet_symbol, args);
-	if (!is_let(e))
-	  wrong_type_error_nr(sc, sc->sublet_symbol, 1, e, a_let_string);
+        check_method(sc, e, sc->sublet_symbol, args);
+        if (!is_let(e))
+          wrong_type_error_nr(sc, sc->sublet_symbol, 1, e, a_let_string);
       }
   return(sublet_1(sc, e, cdr(args), sc->sublet_symbol));
 }
@@ -9918,8 +9918,8 @@ static s7_pointer sublet_chooser(s7_scheme *sc, s7_pointer f, int32_t num_args,
     {
       s7_pointer args = cdr(expr);
       if ((is_pair(car(args))) && (caar(args) == sc->curlet_symbol) && (is_null(cdar(args))) &&
-	  (is_quoted_symbol(cadr(args))))
-	return(sc->sublet_curlet);
+          (is_quoted_symbol(cadr(args))))
+        return(sc->sublet_curlet);
     }
   return(f);
 }
@@ -9948,14 +9948,14 @@ static s7_pointer g_simple_inlet(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer symbol = car(x);
       if (is_keyword(symbol))                 /* (inlet ':allow-other-keys 3) */
-	symbol = keyword_symbol(symbol);
+        symbol = keyword_symbol(symbol);
       if (is_constant_symbol(sc, symbol))     /* (inlet 'pi 1) */
-	wrong_type_error_nr(sc, sc->inlet_symbol, 1, symbol, a_non_constant_symbol_string);
+        wrong_type_error_nr(sc, sc->inlet_symbol, 1, symbol, a_non_constant_symbol_string);
       if (!sp)
-	{
-	  add_slot_unchecked(sc, new_e, symbol, cadr(x), id);
-	  sp = let_slots(new_e);
-	}
+        {
+          add_slot_unchecked(sc, new_e, symbol, cadr(x), id);
+          sp = let_slots(new_e);
+        }
       else sp = inline_add_slot_at_end(sc, id, sp, symbol, cadr(x));
     }
   sc->temp3 = sc->unused;
@@ -10000,10 +10000,10 @@ static s7_pointer internal_inlet(s7_scheme *sc, s7_int num_args, ...)
       s7_pointer symbol = va_arg(ap, s7_pointer);
       s7_pointer value = va_arg(ap, s7_pointer);
       if (!sp)
-	{
-	  add_slot_unchecked(sc, new_e, symbol, value, id);
-	  sp = let_slots(new_e);
-	}
+        {
+          add_slot_unchecked(sc, new_e, symbol, value, id);
+          sp = let_slots(new_e);
+        }
       else sp = inline_add_slot_at_end(sc, id, sp, symbol, value);
     }
   va_end(ap);
@@ -10014,8 +10014,8 @@ static s7_pointer internal_inlet(s7_scheme *sc, s7_int num_args, ...)
 static bool is_proper_quote(s7_scheme *sc, s7_pointer p)
 {
   return((is_safe_quoted_pair(p)) &&
-	 (is_pair(cdr(p))) &&
-	 (is_null(cddr(p))));
+         (is_pair(cdr(p))) &&
+         (is_null(cddr(p))));
 }
 
 static s7_pointer inlet_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_pointer expr)
@@ -10024,25 +10024,25 @@ static s7_pointer inlet_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_po
       ((args % 2) == 0))
     {
       for (s7_pointer p = cdr(expr); is_pair(p); p = cddr(p))
-	{
-	  s7_pointer sym;
-	  if (is_symbol_and_keyword(car(p)))                  /* (inlet :if ...) */
-	    sym = keyword_symbol(car(p));
-	  else
-	    {
-	      if (!is_proper_quote(sc, car(p))) return(f);    /* (inlet abs ...) */
-	      sym = cadar(p);                                 /* looking for (inlet 'a ...) */
-	      if (!is_symbol(sym)) return(f);                 /* (inlet '(a . 3) ...) */
-	      if (is_keyword(sym)) sym = keyword_symbol(sym); /* (inlet ':abs ...) */
-	    }
-	  if ((is_possibly_constant(sym)) ||                  /* (inlet 'define-constant ...) or (inlet 'pi ...) */
-	      (is_syntactic_symbol(sym))  ||                  /* (inlet 'if 3) */
-	      ((is_slot(global_slot(sym))) &&
-	       (is_syntax_or_qq(global_value(sym)))) ||       /* (inlet 'quasiquote 1) */
-	      (sym == sc->let_ref_fallback_symbol) ||
-	      (sym == sc->let_set_fallback_symbol))
-	    return(f);
-	}
+        {
+          s7_pointer sym;
+          if (is_symbol_and_keyword(car(p)))                  /* (inlet :if ...) */
+            sym = keyword_symbol(car(p));
+          else
+            {
+              if (!is_proper_quote(sc, car(p))) return(f);    /* (inlet abs ...) */
+              sym = cadar(p);                                 /* looking for (inlet 'a ...) */
+              if (!is_symbol(sym)) return(f);                 /* (inlet '(a . 3) ...) */
+              if (is_keyword(sym)) sym = keyword_symbol(sym); /* (inlet ':abs ...) */
+            }
+          if ((is_possibly_constant(sym)) ||                  /* (inlet 'define-constant ...) or (inlet 'pi ...) */
+              (is_syntactic_symbol(sym))  ||                  /* (inlet 'if 3) */
+              ((is_slot(global_slot(sym))) &&
+               (is_syntax_or_qq(global_value(sym)))) ||       /* (inlet 'quasiquote 1) */
+              (sym == sc->let_ref_fallback_symbol) ||
+              (sym == sc->let_set_fallback_symbol))
+            return(f);
+        }
       return(sc->simple_inlet);
     }
   return(f);
@@ -10068,11 +10068,11 @@ s7_pointer s7_let_to_list(s7_scheme *sc, s7_pointer let)
   if (let == sc->rootlet)
     {
       for (s7_pointer lib = global_value(sc->libraries_symbol); is_pair(lib); lib = cdr(lib))
-	sc->w = cons(sc, caar(lib), sc->w);
+        sc->w = cons(sc, caar(lib), sc->w);
       sc->w = cons(sc, cons(sc, sc->libraries_symbol, sc->w), sc->nil);
       for (s7_pointer y = sc->rootlet_slots; tis_slot(y); y = next_slot(y))
-	if (slot_symbol(y) != sc->libraries_symbol)
-	  sc->w = cons_unchecked(sc, cons(sc, slot_symbol(y), abbreviate_let(sc, slot_value(y))), sc->w);
+        if (slot_symbol(y) != sc->libraries_symbol)
+          sc->w = cons_unchecked(sc, cons(sc, slot_symbol(y), abbreviate_let(sc, slot_value(y))), sc->w);
       sc->w = proper_list_reverse_in_place(sc, sc->w);
     }
   else
@@ -10082,30 +10082,30 @@ s7_pointer s7_let_to_list(s7_scheme *sc, s7_pointer let)
       /* need to check make-iterator method before dropping into let->list */
 
       if ((has_active_methods(sc, let)) &&
-	  ((func = find_method(sc, let, sc->make_iterator_symbol)) != sc->undefined))
-	iter = s7_apply_function(sc, func, set_plist_1(sc, let));
+          ((func = find_method(sc, let, sc->make_iterator_symbol)) != sc->undefined))
+        iter = s7_apply_function(sc, func, set_plist_1(sc, let));
       else
-	if (let == sc->s7_starlet) /* (let->list *s7*) via s7_starlet_make_iterator */
-	  {
-	    iter = s7_make_iterator(sc, let);
-	    gc_loc = gc_protect_1(sc, iter);
-	  }
-	else iter = sc->nil;
+        if (let == sc->s7_starlet) /* (let->list *s7*) via s7_starlet_make_iterator */
+          {
+            iter = s7_make_iterator(sc, let);
+            gc_loc = gc_protect_1(sc, iter);
+          }
+        else iter = sc->nil;
 
       if (is_null(iter))
-	for (x = let_slots(let); tis_slot(x); x = next_slot(x))
-	  sc->w = cons_unchecked(sc, cons(sc, slot_symbol(x), slot_value(x)), sc->w);
+        for (x = let_slots(let); tis_slot(x); x = next_slot(x))
+          sc->w = cons_unchecked(sc, cons(sc, slot_symbol(x), slot_value(x)), sc->w);
       else
-	/* (begin (load "mockery.scm") (let ((lt ((*mock-pair* 'mock-pair) 1 2 3))) (format *stderr* "~{~A ~}" lt))) */
-	while (true)
-	  {
-	    x = s7_iterate(sc, iter);
-	    if (iterator_is_at_end(iter)) break;
-	    sc->w = cons(sc, x, sc->w);
-	  }
+        /* (begin (load "mockery.scm") (let ((lt ((*mock-pair* 'mock-pair) 1 2 3))) (format *stderr* "~{~A ~}" lt))) */
+        while (true)
+          {
+            x = s7_iterate(sc, iter);
+            if (iterator_is_at_end(iter)) break;
+            sc->w = cons(sc, x, sc->w);
+          }
       sc->w = proper_list_reverse_in_place(sc, sc->w);
       if (gc_loc != -1)
-	s7_gc_unprotect_at(sc, gc_loc);
+        s7_gc_unprotect_at(sc, gc_loc);
     }
   x = sc->w;
   sc->w = sc->temp3;
@@ -10124,12 +10124,12 @@ static s7_pointer g_let_to_list(s7_scheme *sc, s7_pointer args)
   if (!is_let(let))
     {
       if (is_c_object(let))
-	let = c_object_let(let);
+        let = c_object_let(let);
       else
-	if (is_c_pointer(let))
-	  let = c_pointer_info(let);
+        if (is_c_pointer(let))
+          let = c_pointer_info(let);
       if (let == sc->rootlet) /* don't laboriously expand this! */
-	return(cons(sc, let, sc->nil));
+        return(cons(sc, let, sc->nil));
       if (!is_let(let))
         sole_arg_wrong_type_error_nr(sc, sc->let_to_list_symbol, let, a_let_string);
     }
@@ -10169,12 +10169,12 @@ static /* inline */ s7_pointer let_ref(s7_scheme *sc, s7_pointer let, s7_pointer
     {
       let = find_let(sc, let);
       if (!is_let(let))
-	wrong_type_error_nr(sc, sc->let_ref_symbol, 1, let, a_let_string);
+        wrong_type_error_nr(sc, sc->let_ref_symbol, 1, let, a_let_string);
     }
   if (!is_symbol(symbol))
     {
       if ((let != sc->rootlet) && (has_let_ref_fallback(let))) /* let-ref|set-fallback refer to (explicit) let-ref in various forms, not the method lookup process */
-	return(call_let_ref_fallback(sc, let, symbol));
+        return(call_let_ref_fallback(sc, let, symbol));
       wrong_type_error_nr(sc, sc->let_ref_symbol, 2, symbol, a_symbol_string);
     }
   /* a let-ref method is almost impossible to write without creating an infinite loop:
@@ -10195,7 +10195,7 @@ static /* inline */ s7_pointer let_ref(s7_scheme *sc, s7_pointer let, s7_pointer
   for (s7_pointer x = let; x; x = let_outlet(x))
     for (s7_pointer y = let_slots(x); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == symbol)
-	return(slot_value(y));
+        return(slot_value(y));
 
   if (is_openlet(let))
     {
@@ -10203,7 +10203,7 @@ static /* inline */ s7_pointer let_ref(s7_scheme *sc, s7_pointer let, s7_pointer
        *   versus keys), and we can't just try again here because that makes it too easy to get into infinite recursion.  So, 'let-ref-fallback...
        */
       if (has_let_ref_fallback(let))
-	return(call_let_ref_fallback(sc, let, symbol));
+        return(call_let_ref_fallback(sc, let, symbol));
     }
   return((is_slot(global_slot(symbol))) ? global_value(symbol) : sc->undefined); /* (let () ((curlet) 'pi)) */
 }
@@ -10216,7 +10216,7 @@ static s7_pointer g_let_ref(s7_scheme *sc, s7_pointer args)
   #define Q_let_ref s7_make_signature(sc, 3, sc->T, sc->is_let_symbol, sc->is_symbol_symbol)
   if (!is_pair(cdr(args)))
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_2(sc, wrap_string(sc, "let-ref: symbol missing: ~S", 27), set_ulist_1(sc, sc->let_ref_symbol, args)));
+             set_elist_2(sc, wrap_string(sc, "let-ref: symbol missing: ~S", 27), set_ulist_1(sc, sc->let_ref_symbol, args)));
   return(let_ref(sc, car(args), cadr(args)));
 }
 
@@ -10237,7 +10237,7 @@ static s7_pointer let_ref_p_pp(s7_scheme *sc, s7_pointer lt, s7_pointer sym)
   for (s7_pointer x = lt; x; x = let_outlet(x))
     for (s7_pointer y = let_slots(x); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == sym)
-	return(slot_value(y));
+        return(slot_value(y));
   if ((lt != sc->nil) && (has_let_ref_fallback(lt)))
     return(call_let_ref_fallback(sc, lt, sym));
   return((is_slot(global_slot(sym))) ? global_value(sym) : sc->undefined);
@@ -10264,12 +10264,12 @@ static s7_pointer let_ref_chooser(s7_scheme *sc, s7_pointer f, int32_t unused_ar
     {
       s7_pointer arg1 = cadr(expr), arg2 = caddr(expr);
       if ((car(arg1) == sc->cdr_symbol) &&
-	  (is_quoted_symbol(arg2)) &&
-	  (!is_possibly_constant(cadr(arg2))))
-	{
-	  set_opt3_sym(cdr(expr), cadr(arg2));
-	  return(sc->simple_let_ref);
-	}}
+          (is_quoted_symbol(arg2)) &&
+          (!is_possibly_constant(cadr(arg2))))
+        {
+          set_opt3_sym(cdr(expr), cadr(arg2));
+          return(sc->simple_let_ref);
+        }}
   return(f);
 }
 
@@ -10311,20 +10311,20 @@ static s7_pointer let_set_1(s7_scheme *sc, s7_pointer let, s7_pointer symbol, s7
     {
       s7_pointer slot;
       if (is_constant_symbol(sc, symbol))  /* (let-set! (rootlet) 'pi #f) */
-	wrong_type_error_nr(sc, sc->let_set_symbol, 2, symbol, a_non_constant_symbol_string);
+        wrong_type_error_nr(sc, sc->let_set_symbol, 2, symbol, a_non_constant_symbol_string);
       /* it would be nice if safety>0 to add an error check for bad arity if a built-in method is set (set! (lt 'write) hash-table-set!),
        *   built_in being is_slot(initial_slot(sym)), but this function is called a ton, and this error can't easily be
        *   checked by the optimizer (we see the names, but not the values, so bad arity check requires assumptions about those values).
        */
       slot = global_slot(symbol);
       if (!is_slot(slot))
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_3(sc, wrap_string(sc, "let-set!: ~A is not defined in ~A", 33), symbol, let));
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_3(sc, wrap_string(sc, "let-set!: ~A is not defined in ~A", 33), symbol, let));
       if (is_syntax(slot_value(slot)))
-	wrong_type_error_nr(sc, sc->let_set_symbol, 2, symbol, wrap_string(sc, "a non-syntactic symbol", 22));
+        wrong_type_error_nr(sc, sc->let_set_symbol, 2, symbol, wrap_string(sc, "a non-syntactic symbol", 22));
       if (is_immutable(slot))
-	immutable_object_error_nr(sc, set_elist_4(sc, wrap_string(sc, "~S is immutable in (let-set! (rootlet) '~S ~S)", 46),
-						  symbol, symbol, value)); /* also (set! (with-let...)...) */
+        immutable_object_error_nr(sc, set_elist_4(sc, wrap_string(sc, "~S is immutable in (let-set! (rootlet) '~S ~S)", 46),
+                                                  symbol, symbol, value)); /* also (set! (with-let...)...) */
       symbol_increment_ctr(symbol);
       slot_set_value(slot, (slot_has_setter(slot)) ? call_setter(sc, slot, value) : value);
       return(slot_value(slot));
@@ -10336,20 +10336,20 @@ static s7_pointer let_set_1(s7_scheme *sc, s7_pointer let, s7_pointer symbol, s7
      s7_pointer slot = local_slot(symbol);
      if (is_slot(slot))
        {
-	 symbol_increment_ctr(symbol);
-	 return(checked_slot_set_value(sc, slot, value));
+         symbol_increment_ctr(symbol);
+         return(checked_slot_set_value(sc, slot, value));
        }}
   for (s7_pointer x = let; x; x = let_outlet(x))
     for (s7_pointer y = let_slots(x); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == symbol)
-	{
-	  symbol_increment_ctr(symbol);
-	  return(checked_slot_set_value(sc, y, value));
-	}
+        {
+          symbol_increment_ctr(symbol);
+          return(checked_slot_set_value(sc, y, value));
+        }
 
   if (!has_let_set_fallback(let))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_3(sc, wrap_string(sc, "let-set!: ~A is not defined in ~A", 33), symbol, let));
+             set_elist_3(sc, wrap_string(sc, "let-set!: ~A is not defined in ~A", 33), symbol, let));
   /* not sure about this -- what's the most useful choice? */
   return(call_let_set_fallback(sc, let, symbol, value));
 }
@@ -10361,7 +10361,7 @@ static s7_pointer let_set_2(s7_scheme *sc, s7_pointer let, s7_pointer symbol, s7
   if (!is_symbol(symbol))
     {
       if ((let != sc->rootlet) && (has_let_set_fallback(let)))
-	return(call_let_set_fallback(sc, let, symbol, value));
+        return(call_let_set_fallback(sc, let, symbol, value));
       wrong_type_error_nr(sc, sc->let_set_symbol, 2, symbol, a_symbol_string);
     }
   /* currently let-set! is immutable, so we don't have to check for a let-set! method (so let_set! is always global) */
@@ -10378,7 +10378,7 @@ static s7_pointer g_let_set(s7_scheme *sc, s7_pointer args)
 
   if (!is_pair(cdr(args))) /* (let ((a 123.0)) (define (f) (set! (let-ref) a)) (catch #t f (lambda args #f)) (f)) */
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~S: not enough arguments: ~S", 28), sc->let_set_symbol, sc->code));
+             set_elist_3(sc, wrap_string(sc, "~S: not enough arguments: ~S", 28), sc->let_set_symbol, sc->code));
 
   return(let_set_2(sc, car(args), cadr(args), caddr(args)));
 }
@@ -10399,14 +10399,14 @@ static s7_pointer g_simple_let_set(s7_scheme *sc, s7_pointer args)
   if (lt != sc->rootlet)
     {
       for (s7_pointer x = lt; x; x = let_outlet(x))
-	for (y = let_slots(x); tis_slot(y); y = next_slot(y))
-	  if (slot_symbol(y) == sym)
-	    {
-	      slot_set_value(y, (slot_has_setter(y)) ? call_setter(sc, y, val) : val);
-	      return(slot_value(y));
-	    }
+        for (y = let_slots(x); tis_slot(y); y = next_slot(y))
+          if (slot_symbol(y) == sym)
+            {
+              slot_set_value(y, (slot_has_setter(y)) ? call_setter(sc, y, val) : val);
+              return(slot_value(y));
+            }
       if ((lt != sc->rootlet) && (has_let_set_fallback(lt)))
-	return(call_let_set_fallback(sc, lt, sym, val));
+        return(call_let_set_fallback(sc, lt, sym, val));
     }
   y = global_slot(sym);
   if (!is_slot(y))
@@ -10421,10 +10421,10 @@ static s7_pointer let_set_chooser(s7_scheme *sc, s7_pointer f, int32_t unused_ar
     {
       s7_pointer arg1 = cadr(expr), arg2 = caddr(expr), arg3 = cadddr(expr);
       if ((car(arg1) == sc->cdr_symbol) &&
-	  (is_quoted_pair(arg2)) &&
-	  (!is_possibly_constant(cadr(arg2))) &&
-	  (!is_possibly_constant(arg3)))
-	return(sc->simple_let_set);
+          (is_quoted_pair(arg2)) &&
+          (!is_possibly_constant(cadr(arg2))) &&
+          (!is_possibly_constant(arg3)))
+        return(sc->simple_let_set);
     }
   return(f);
 }
@@ -10460,23 +10460,23 @@ static s7_pointer let_copy(s7_scheme *sc, s7_pointer let)
       s7_int id = let_id(new_e);
       s7_pointer y = NULL;
       for (s7_pointer x = let_slots(let); tis_slot(x); x = next_slot(x))
-	{
-	  s7_pointer z;
-	  new_cell(sc, z, T_SLOT);
-	  slot_set_symbol_and_value(z, slot_symbol(x), slot_value(x));
-	  if (symbol_id(slot_symbol(z)) != id) /* keep shadowing intact */
-	    symbol_set_local_slot(slot_symbol(x), id, z);
-	  if (slot_has_setter(x))
-	    {
-	      slot_set_setter(z, slot_setter(x));
-	      slot_set_has_setter(z);
-	    }
-	  if (y)
-	    slot_set_next(y, z);
-	  else let_set_slots(new_e, z);
-	  slot_set_next(z, slot_end);          /* in case GC runs during this loop */
-	  y = z;
-	}}
+        {
+          s7_pointer z;
+          new_cell(sc, z, T_SLOT);
+          slot_set_symbol_and_value(z, slot_symbol(x), slot_value(x));
+          if (symbol_id(slot_symbol(z)) != id) /* keep shadowing intact */
+            symbol_set_local_slot(slot_symbol(x), id, z);
+          if (slot_has_setter(x))
+            {
+              slot_set_setter(z, slot_setter(x));
+              slot_set_has_setter(z);
+            }
+          if (y)
+            slot_set_next(y, z);
+          else let_set_slots(new_e, z);
+          slot_set_next(z, slot_end);          /* in case GC runs during this loop */
+          y = z;
+        }}
   /* We can't do a (normal) loop here then reverse the slots later because the symbol's local_slot has to
    *    match the unshadowed slot, not the last in the list:
    *    (let ((e1 (inlet 'a 1 'a 2))) (let ((e2 (copy e1))) (list (equal? e1 e2) (equal? (e1 'a) (e2 'a)))))
@@ -10534,7 +10534,7 @@ static void update_symbol_ids(s7_scheme *sc, s7_pointer e)
     {
       s7_pointer sym = slot_symbol(p);
       if (symbol_id(sym) != sc->let_number)
-	symbol_set_local_slot_unincremented(sym, sc->let_number, p);
+        symbol_set_local_slot_unincremented(sym, sc->let_number, p);
     }
 }
 
@@ -10590,9 +10590,9 @@ static s7_pointer g_set_outlet(s7_scheme *sc, s7_pointer args)
     {
       /* here it's possible to get cyclic let chains; maybe do this check only if safety>0 */
       for (s7_pointer lt = new_outer; lt; lt = let_outlet(lt))
-	if (let == lt)
-	  error_nr(sc, make_symbol(sc, "cyclic-let", 10),
-		   set_elist_2(sc, wrap_string(sc, "set! (outlet ~A) creates a cyclic let chain", 43), let));
+        if (let == lt)
+          error_nr(sc, make_symbol(sc, "cyclic-let", 10),
+                   set_elist_2(sc, wrap_string(sc, "set! (outlet ~A) creates a cyclic let chain", 43), let));
       let_set_outlet(let, new_outer);
     }
   return(new_outer);
@@ -10607,12 +10607,12 @@ static Inline s7_pointer inline_lookup_from(s7_scheme *sc, const s7_pointer symb
     {
       do {e = let_outlet(e);} while (let_id(e) > symbol_id(symbol));
       if (let_id(e) == symbol_id(symbol))
-	return(local_value(symbol));
+        return(local_value(symbol));
     }
   for (; e; e = let_outlet(e))
     for (s7_pointer y = let_slots(e); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == symbol)
-	return(slot_value(y));
+        return(slot_value(y));
 
   if (is_slot(global_slot(symbol)))
     return(global_value(symbol));
@@ -10640,12 +10640,12 @@ static inline s7_pointer lookup_slot_from(s7_pointer symbol, s7_pointer e)
     {
       do {e = let_outlet(e);} while (let_id(e) > symbol_id(symbol));
       if (let_id(e) == symbol_id(symbol))
-	return(local_slot(symbol));
+        return(local_slot(symbol));
     }
   for (; e; e = let_outlet(e))
     for (s7_pointer y = let_slots(e); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == symbol)
-	return(y);
+        return(y);
   return(global_slot(symbol));
 }
 
@@ -10665,7 +10665,7 @@ static s7_pointer symbol_to_local_slot(s7_scheme *sc, s7_pointer symbol, s7_poin
   if (symbol_id(symbol) != 0)
     for (s7_pointer y = let_slots(e); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == symbol)
-	return(y);
+        return(y);
   return(sc->undefined);
 }
 
@@ -10683,12 +10683,12 @@ s7_pointer s7_symbol_local_value(s7_scheme *sc, s7_pointer sym, s7_pointer let)
     {
       do {let = let_outlet(let);} while (let_id(let) > symbol_id(sym));
       if (let_id(let) == symbol_id(sym))
-	return(local_value(sym));
+        return(local_value(sym));
     }
   for (; let; let = let_outlet(let))
     for (s7_pointer y = let_slots(let); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == sym)
-	return(slot_value(y));
+        return(slot_value(y));
 
   /* maybe let is local but sym is global but previously shadowed */
   if (is_slot(global_slot(sym)))
@@ -10719,23 +10719,23 @@ symbol sym in the given let: (let ((x 32)) (symbol->value 'x)) -> 32"
   if (is_keyword(sym))
     {
       if ((is_pair(cdr(args))) && (!is_let(cadr(args))) && (!is_let(find_let(sc, cadr(args)))))
-	wrong_type_error_nr(sc, sc->symbol_to_value_symbol, 2, cadr(args), sc->type_names[T_LET]);
+        wrong_type_error_nr(sc, sc->symbol_to_value_symbol, 2, cadr(args), sc->type_names[T_LET]);
       return(sym);
     }
   if (is_not_null(cdr(args)))
     {
       s7_pointer local_let = cadr(args);
       if (local_let == sc->unlet_symbol)
-	return((is_slot(initial_slot(sym))) ? initial_value(sym) : sc->undefined);
+        return((is_slot(initial_slot(sym))) ? initial_value(sym) : sc->undefined);
 
       if (!is_let(local_let))
-	{
-	  local_let = find_let(sc, local_let);
-	  if (!is_let(local_let))
-	    return(method_or_bust(sc, cadr(args), sc->symbol_to_value_symbol, args, a_let_string, 2)); /* not local_let */
-	}
+        {
+          local_let = find_let(sc, local_let);
+          if (!is_let(local_let))
+            return(method_or_bust(sc, cadr(args), sc->symbol_to_value_symbol, args, a_let_string, 2)); /* not local_let */
+        }
       if (local_let == sc->s7_starlet)
-	return(s7_starlet(sc, s7_starlet_symbol(sym)));
+        return(s7_starlet(sc, s7_starlet_symbol(sym)));
 
       return(s7_symbol_local_value(sc, sym, local_let));
     }
@@ -10765,10 +10765,10 @@ static s7_pointer find_dynamic_value(s7_scheme *sc, s7_pointer x, s7_pointer sym
   for (; (x) && (let_id(x) > (*id)); x = let_outlet(x))
     for (s7_pointer y = let_slots(x); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == sym)
-	{
-	  (*id) = let_id(x);
-	  return(slot_value(y));
-	}
+        {
+          (*id) = let_id(x);
+          return(slot_value(y));
+        }
   return(sc->unused);
 }
 
@@ -10796,11 +10796,11 @@ static s7_pointer g_symbol_to_dynamic_value(s7_scheme *sc, s7_pointer args)
   for (int64_t i = stack_top(sc) - 1; i > 0; i -= 4)
     if (is_let_unchecked(stack_let(sc->stack, i))) /* OP_GC_PROTECT let slot can be anything (even free) */
       {
-	s7_pointer cur_val = find_dynamic_value(sc, stack_let(sc->stack, i), sym, &top_id);
-	if (cur_val != sc->unused)
-	  val = cur_val;
-	if (top_id == symbol_id(sym))
-	  return(val);
+        s7_pointer cur_val = find_dynamic_value(sc, stack_let(sc->stack, i), sym, &top_id);
+        if (cur_val != sc->unused)
+          val = cur_val;
+        if (top_id == symbol_id(sym))
+          return(val);
       }
   return((val == sc->unused) ? s7_symbol_value(sc, sym) : val);
 }
@@ -10809,7 +10809,7 @@ static bool direct_memq(const s7_pointer symbol, s7_pointer symbols)
 {
   for (s7_pointer x = symbols; is_pair(x); x = cdr(x))
     if (car(x) == symbol)
-	return(true);
+        return(true);
   return(false);
 }
 
@@ -10824,8 +10824,8 @@ static bool direct_assq(const s7_pointer symbol, s7_pointer symbols)
 static bool do_symbol_is_safe(s7_scheme *sc, s7_pointer sym, s7_pointer e)
 {
   return((is_slot(global_slot(sym))) ||
-	 (direct_assq(sym, e)) ||
-	 (is_slot(s7_slot(sc, sym))));
+         (direct_assq(sym, e)) ||
+         (is_slot(s7_slot(sc, sym))));
 }
 
 static bool let_symbol_is_safe(s7_scheme *sc, s7_pointer sym, s7_pointer e)
@@ -10840,20 +10840,20 @@ static bool let_symbol_is_safe(s7_scheme *sc, s7_pointer sym, s7_pointer e)
 static bool let_symbol_is_safe_or_listed(s7_scheme *sc, s7_pointer sym, s7_pointer e)
 {
   return((symbol_is_in_list(sc, sym)) ||
-	 (let_symbol_is_safe(sc, sym, e)));
+         (let_symbol_is_safe(sc, sym, e)));
 }
 
 static bool let_star_symbol_is_safe(s7_scheme *sc, s7_pointer sym, s7_pointer e)
 {
   return((symbol_is_in_list(sc, sym)) ||
-	 (is_slot(global_slot(sym))) ||
-	 ((is_let(e)) && (!is_with_let_let(e)) && (is_slot(s7_slot(sc, sym)))));
+         (is_slot(global_slot(sym))) ||
+         ((is_let(e)) && (!is_with_let_let(e)) && (is_slot(s7_slot(sc, sym)))));
 }
 
 static bool pair_symbol_is_safe(s7_scheme *unused_sc, s7_pointer sym, s7_pointer e)
 {
   return((is_slot(global_slot(sym))) ||
-	 (direct_memq(sym, e)));
+         (direct_memq(sym, e)));
 }
 
 static s7_pointer collect_variables(s7_scheme *sc, s7_pointer lst, s7_pointer e)
@@ -10880,12 +10880,12 @@ static s7_pointer collect_parameters(s7_scheme *sc, s7_pointer lst, s7_pointer e
     {
       s7_pointer car_p = car(p);
       if (is_pair(car_p))
-	car_p = car(car_p);
+        car_p = car(car_p);
       if (is_normal_symbol(car_p))
-	{
-	  symbol_set_id(car_p, the_un_id);
-	  sc->w = cons(sc, add_symbol_to_list(sc, car_p), sc->w);
-	}}
+        {
+          symbol_set_id(car_p, the_un_id);
+          sc->w = cons(sc, add_symbol_to_list(sc, car_p), sc->w);
+        }}
   if (is_symbol(p)) /* rest arg */
     {
       symbol_set_id(p, the_un_id);
@@ -10905,12 +10905,12 @@ static void clear_all_optimizations(s7_scheme *sc, s7_pointer p)
   if (is_pair(p))
     {
       if ((is_optimized(p)) &&
- 	  (((optimize_op(p) >= FIRST_UNHOPPABLE_OP) ||  /* avoid clearing hop ops, fx_function and op_unknown* need to be cleared */
-	    (!op_has_hop(p)))))
-	{
-	  clear_optimized(p);     /* includes T_SYNTACTIC */
-	  clear_optimize_op(p);
-	}
+           (((optimize_op(p) >= FIRST_UNHOPPABLE_OP) ||  /* avoid clearing hop ops, fx_function and op_unknown* need to be cleared */
+            (!op_has_hop(p)))))
+        {
+          clear_optimized(p);     /* includes T_SYNTACTIC */
+          clear_optimize_op(p);
+        }
       clear_all_optimizations(sc, cdr(p));
       clear_all_optimizations(sc, car(p));
     }
@@ -10994,24 +10994,24 @@ static s7_pointer make_macro(s7_scheme *sc, opcode_t op, bool named)
       s7_pointer mac_slot;
       mac_name = caar(sc->code);
       if (((op == OP_DEFINE_EXPANSION) || (op == OP_DEFINE_EXPANSION_STAR)) &&
-	  (sc->curlet == sc->rootlet))
-	set_full_type(mac_name, T_EXPANSION | T_SYMBOL | (full_type(mac_name) & T_UNHEAP));
+          (sc->curlet == sc->rootlet))
+        set_full_type(mac_name, T_EXPANSION | T_SYMBOL | (full_type(mac_name) & T_UNHEAP));
 
       /* symbol? macro name has already been checked, find name in let, and define it */
       mac_slot = symbol_to_local_slot(sc, mac_name, sc->curlet); /* returns global_slot(symbol) if sc->curlet == nil */
 
       if (is_slot(mac_slot))
-	{
-	  if (is_immutable_slot(mac_slot))
-	    immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't ~S ~S; it is immutable", 28), cur_op_to_caller(sc, op), mac_name));
-
-	  if ((sc->curlet == sc->nil) && (!in_rootlet(mac_slot)))
-	    add_slot_to_rootlet(sc, mac_slot);
-	  slot_set_value_with_hook(mac_slot, mac);
-	}
+        {
+          if (is_immutable_slot(mac_slot))
+            immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't ~S ~S; it is immutable", 28), cur_op_to_caller(sc, op), mac_name));
+
+          if ((sc->curlet == sc->nil) && (!in_rootlet(mac_slot)))
+            add_slot_to_rootlet(sc, mac_slot);
+          slot_set_value_with_hook(mac_slot, mac);
+        }
       else s7_make_slot(sc, sc->curlet, mac_name, mac); /* was current but we've checked immutable already */
       if (tree_has_definers(sc, body))
-	set_is_definer(mac_name);                       /* (list-values 'define ...) aux-13 */
+        set_is_definer(mac_name);                       /* (list-values 'define ...) aux-13 */
     }
 
   if ((!is_either_bacro(mac)) &&
@@ -11027,10 +11027,10 @@ static s7_pointer make_macro(s7_scheme *sc, opcode_t op, bool named)
       set_pair_macro(closure_body(mac), mac_name);
       set_has_pair_macro(mac);
       if (has_location(car(sc->code)))
-	{
-	  pair_set_location(closure_body(mac), pair_location(car(sc->code)));
-	  set_has_location(closure_body(mac));
-	}}
+        {
+          pair_set_location(closure_body(mac), pair_location(car(sc->code)));
+          set_has_location(closure_body(mac));
+        }}
   /* passed to maclet in apply_macro et al, copied in copy_closure */
   return(mac);
 }
@@ -11124,8 +11124,8 @@ static s7_pointer copy_tree_with_type(s7_scheme *sc, s7_pointer tree)
   #define COPY_TREE_WITH_TYPE(P) copy_tree_with_type(sc, P)
 #endif
   return(cons_unchecked_with_type(sc, tree,
-				  (is_unquoted_pair(car(tree))) ? COPY_TREE_WITH_TYPE(car(tree)) : car(tree),
-				  (is_unquoted_pair(cdr(tree))) ? COPY_TREE_WITH_TYPE(cdr(tree)) : cdr(tree)));
+                                  (is_unquoted_pair(car(tree))) ? COPY_TREE_WITH_TYPE(car(tree)) : car(tree),
+                                  (is_unquoted_pair(cdr(tree))) ? COPY_TREE_WITH_TYPE(cdr(tree)) : cdr(tree)));
 }
 
 static inline s7_pointer copy_tree(s7_scheme *sc, s7_pointer tree)
@@ -11138,8 +11138,8 @@ static inline s7_pointer copy_tree(s7_scheme *sc, s7_pointer tree)
   #define COPY_TREE(P) copy_tree(sc, P)
 #endif
   return(cons_unchecked(sc,
-			(is_unquoted_pair(car(tree))) ? COPY_TREE(car(tree)) : car(tree),
-			(is_pair(cdr(tree))) ? COPY_TREE(cdr(tree)) : cdr(tree)));
+                        (is_unquoted_pair(car(tree))) ? COPY_TREE(car(tree)) : car(tree),
+                        (is_pair(cdr(tree))) ? COPY_TREE(cdr(tree)) : cdr(tree)));
 }
 
 
@@ -11156,22 +11156,22 @@ static int32_t tree_is_cyclic_or_has_pairs(s7_scheme *sc, s7_pointer tree)
     {
       if (tree_is_collected(fast)) return(TREE_CYCLIC);
       if ((!has_pairs) && (is_unquoted_pair(car(fast))))
-	has_pairs = true;
+        has_pairs = true;
       fast = cdr(fast);
       if (!is_pair(fast))
-	{
-	  if (!has_pairs) return(TREE_NOT_CYCLIC);
-	  break;
-	}
+        {
+          if (!has_pairs) return(TREE_NOT_CYCLIC);
+          break;
+        }
       if (tree_is_collected(fast)) return(TREE_CYCLIC);
       if ((!has_pairs) && (is_unquoted_pair(car(fast))))
-	has_pairs = true;
+        has_pairs = true;
       fast = cdr(fast);
       if (!is_pair(fast))
-	{
-	  if (!has_pairs) return(TREE_NOT_CYCLIC);
-	  break;
-	}
+        {
+          if (!has_pairs) return(TREE_NOT_CYCLIC);
+          break;
+        }
       slow = cdr(slow);
       if (fast == slow) return(TREE_CYCLIC);
     }
@@ -11186,29 +11186,29 @@ static bool tree_is_cyclic_1(s7_scheme *sc, s7_pointer tree)
     {
       tree_set_collected(p);
       if (sc->tree_pointers_top == sc->tree_pointers_size)
-	{
-	  if (sc->tree_pointers_size == 0)
-	    {
-	      sc->tree_pointers_size = 8;
-	      sc->tree_pointers = (s7_pointer *)Malloc(sc->tree_pointers_size * sizeof(s7_pointer));
-	    }
-	  else
-	    {
-	      sc->tree_pointers_size *= 2;
-	      sc->tree_pointers = (s7_pointer *)Realloc(sc->tree_pointers, sc->tree_pointers_size * sizeof(s7_pointer));
-	    }}
+        {
+          if (sc->tree_pointers_size == 0)
+            {
+              sc->tree_pointers_size = 8;
+              sc->tree_pointers = (s7_pointer *)Malloc(sc->tree_pointers_size * sizeof(s7_pointer));
+            }
+          else
+            {
+              sc->tree_pointers_size *= 2;
+              sc->tree_pointers = (s7_pointer *)Realloc(sc->tree_pointers, sc->tree_pointers_size * sizeof(s7_pointer));
+            }}
       sc->tree_pointers[sc->tree_pointers_top++] = p;
       if (is_unquoted_pair(car(p)))
-	{
-	  int32_t old_top = sc->tree_pointers_top, result;
-	  result = tree_is_cyclic_or_has_pairs(sc, car(p));
-	  if ((result == TREE_CYCLIC) ||
-	      (tree_is_cyclic_1(sc, car(p))))
-	    return(true);
-	  for (int32_t i = old_top; i < sc->tree_pointers_top; i++)
-	    tree_clear_collected(sc->tree_pointers[i]);
-	  sc->tree_pointers_top = old_top;
-	}}
+        {
+          int32_t old_top = sc->tree_pointers_top, result;
+          result = tree_is_cyclic_or_has_pairs(sc, car(p));
+          if ((result == TREE_CYCLIC) ||
+              (tree_is_cyclic_1(sc, car(p))))
+            return(true);
+          for (int32_t i = old_top; i < sc->tree_pointers_top; i++)
+            tree_clear_collected(sc->tree_pointers[i]);
+          sc->tree_pointers_top = old_top;
+        }}
   return(false);
 }
 
@@ -11280,34 +11280,34 @@ Only the let is searched if ignore-globals is not #f."
     {
       s7_pointer e = cadr(args), b, x;
       if (!is_let(e))
-	{
-	  e = find_let(sc, e);  /* returns () if none */
-	  if (!is_let(e))
-	    wrong_type_error_nr(sc, sc->is_defined_symbol, 2, cadr(args), a_let_string); /* not e */
-	}
+        {
+          e = find_let(sc, e);  /* returns () if none */
+          if (!is_let(e))
+            wrong_type_error_nr(sc, sc->is_defined_symbol, 2, cadr(args), a_let_string); /* not e */
+        }
       if (is_keyword(sym))                       /* if no "e", is global -> #t */
-	{                                        /* we're treating :x as 'x outside rootlet, but consider all keywords defined (as themselves) in rootlet? */
-	  if (e == sc->rootlet) return(sc->T);   /* (defined? x (rootlet)) where x value is a keyword */
-	  sym = keyword_symbol(sym);             /* (defined? :print-length *s7*) */
-	}
+        {                                        /* we're treating :x as 'x outside rootlet, but consider all keywords defined (as themselves) in rootlet? */
+          if (e == sc->rootlet) return(sc->T);   /* (defined? x (rootlet)) where x value is a keyword */
+          sym = keyword_symbol(sym);             /* (defined? :print-length *s7*) */
+        }
       if (e == sc->s7_starlet)
-	return(make_boolean(sc, s7_starlet_symbol(sym) != SL_NO_FIELD));
+        return(make_boolean(sc, s7_starlet_symbol(sym) != SL_NO_FIELD));
       if (is_pair(cddr(args)))
-	{
-	  b = caddr(args);
-	  if (!is_boolean(b))
-	    return(method_or_bust(sc, b, sc->is_defined_symbol, args, a_boolean_string, 3));
-	}
+        {
+          b = caddr(args);
+          if (!is_boolean(b))
+            return(method_or_bust(sc, b, sc->is_defined_symbol, args, a_boolean_string, 3));
+        }
       else b = sc->F;
       if (e == sc->rootlet) /* we checked (let? e) above */
-	{
-	  if (b == sc->F)
-	    return(make_boolean(sc, is_slot(global_slot(sym)))); /* new_symbol and gensym initialize global_slot to #<undefined> */
-	  return(sc->F);
-	}
+        {
+          if (b == sc->F)
+            return(make_boolean(sc, is_slot(global_slot(sym)))); /* new_symbol and gensym initialize global_slot to #<undefined> */
+          return(sc->F);
+        }
       x = symbol_to_local_slot(sc, sym, e);
       if (is_slot(x))
-	return(sc->T);
+        return(sc->T);
       return((b == sc->T) ? sc->F : make_boolean(sc, is_slot(global_slot(sym))));
     }
   return((is_global(sym)) ? sc->T : make_boolean(sc, is_slot(s7_slot(sc, sym))));
@@ -11331,10 +11331,10 @@ static s7_pointer is_defined_chooser(s7_scheme *sc, s7_pointer f, int32_t args,
     {
       s7_pointer e = caddr(expr);
       if ((is_pair(e)) && (is_null(cdr(e))) && (car(e) == sc->rootlet_symbol))
-	{
-	  set_safe_optimize_op(expr, HOP_SAFE_C_NC);
-	  return(sc->is_defined_in_rootlet);
-	}}
+        {
+          set_safe_optimize_op(expr, HOP_SAFE_C_NC);
+          return(sc->is_defined_in_rootlet);
+        }}
   return(f);
 }
 
@@ -11366,11 +11366,11 @@ void s7_define(s7_scheme *sc, s7_pointer let, s7_pointer symbol, s7_pointer valu
       s7_make_slot(sc, let, symbol, value); /* I think this means C code can override "constant" defs */
       /* if let is rootlet, s7_make_slot makes a semipermanent_slot */
       if ((let == sc->shadow_rootlet) &&
-	  (!is_slot(global_slot(symbol))))
-	{
-	  set_global(symbol); /* is_global => global_slot is usable -- is this a good idea? */
-	  set_global_slot(symbol, local_slot(symbol));
-	}}
+          (!is_slot(global_slot(symbol))))
+        {
+          set_global(symbol); /* is_global => global_slot is usable -- is this a good idea? */
+          set_global_slot(symbol, local_slot(symbol));
+        }}
 }
 
 s7_pointer s7_define_variable(s7_scheme *sc, const char *name, s7_pointer value)
@@ -11518,12 +11518,12 @@ void *s7_c_pointer_with_type(s7_scheme *sc, s7_pointer p, s7_pointer expected_ty
   if ((c_pointer(p) != NULL) &&
       (c_pointer_type(p) != expected_type))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     (argnum == 0) ?
-	     set_elist_4(sc, wrap_string(sc, "~S argument is a pointer of type ~S, but expected ~S", 52),
-			 wrap_string(sc, caller, safe_strlen(caller)), c_pointer_type(p), expected_type) :
-	     set_elist_5(sc, wrap_string(sc, "~S ~:D argument got a pointer of type ~S, but expected ~S", 57),
-			 wrap_string(sc, caller, safe_strlen(caller)),
-			 wrap_integer(sc, argnum), c_pointer_type(p), expected_type));
+             (argnum == 0) ?
+             set_elist_4(sc, wrap_string(sc, "~S argument is a pointer of type ~S, but expected ~S", 52),
+                         wrap_string(sc, caller, safe_strlen(caller)), c_pointer_type(p), expected_type) :
+             set_elist_5(sc, wrap_string(sc, "~S ~:D argument got a pointer of type ~S, but expected ~S", 57),
+                         wrap_string(sc, caller, safe_strlen(caller)),
+                         wrap_integer(sc, argnum), c_pointer_type(p), expected_type));
   return(c_pointer(p));
 }
 
@@ -11575,16 +11575,16 @@ static s7_pointer g_c_pointer(s7_scheme *sc, s7_pointer args)
       type = car(args);
       args = cdr(args);
       if (is_pair(args))
-	{
-	  info = car(args);
-	  args = cdr(args);
-	  if (is_pair(args))
-	    {
-	      weak1 = car(args);
-	      args = cdr(args);
-	      if (is_pair(args))
-		weak2 = car(args);
-	    }}}
+        {
+          info = car(args);
+          args = cdr(args);
+          if (is_pair(args))
+            {
+              weak1 = car(args);
+              args = cdr(args);
+              if (is_pair(args))
+                weak2 = car(args);
+            }}}
   cp = s7_make_c_pointer_with_type(sc, (void *)p, type, info);
   c_pointer_set_weak1(cp, weak1);
   c_pointer_set_weak2(cp, weak2);
@@ -11718,50 +11718,50 @@ static s7_pointer copy_any_list(s7_scheme *sc, s7_pointer a)
   while (true)
     {
       if (!is_pair(fast))
-	{
-	  if (is_null(fast))
-	    wrap_return(sc->w);
-	  set_cdr(p, fast);
-	  wrap_return(sc->w);
-	}
+        {
+          if (is_null(fast))
+            wrap_return(sc->w);
+          set_cdr(p, fast);
+          wrap_return(sc->w);
+        }
 
       set_cdr(p, list_1(sc, car(fast)));
       p = cdr(p);
       fast = cdr(fast);
       if (!is_pair(fast))
-	{
-	  if (is_null(fast))
-	    wrap_return(sc->w);
-	  set_cdr(p, fast);
-	  wrap_return(sc->w);
-	}
+        {
+          if (is_null(fast))
+            wrap_return(sc->w);
+          set_cdr(p, fast);
+          wrap_return(sc->w);
+        }
       /* if unrolled further, it's a lot slower? */
       set_cdr(p, list_1_unchecked(sc, car(fast)));
       p = cdr(p);
       fast = cdr(fast);
       slow = cdr(slow);
       if (fast == slow)
-	{
-	  /* try to preserve the original cyclic structure */
-	  s7_pointer p1, f1, p2, f2;
-	  set_match_pair(a);
-	  for (p1 = sc->w, f1 = a; !(is_matched_pair(cdr(f1))); f1 = cdr(f1), p1 = cdr(p1))
-	    set_match_pair(f1);
-	  for (p2 = sc->w, f2 = a; cdr(f1) != f2; f2 = cdr(f2), p2 = cdr(p2))
-	    clear_match_pair(f2);
-	  for (f1 = f2; is_pair(f1); f1 = cdr(f1), f2 = cdr(f2))
-	    {
-	      clear_match_pair(f1);
-	      f1 = cdr(f1);
-	      clear_match_pair(f1);
-	      if (f1 == f2) break;
-	    }
-	  clear_match_pair(a);
-	  if (is_null(p1))
-	    set_cdr(p2, p2);
-	  else set_cdr(p1, p2);
-	  wrap_return(sc->w);
-	}}
+        {
+          /* try to preserve the original cyclic structure */
+          s7_pointer p1, f1, p2, f2;
+          set_match_pair(a);
+          for (p1 = sc->w, f1 = a; !(is_matched_pair(cdr(f1))); f1 = cdr(f1), p1 = cdr(p1))
+            set_match_pair(f1);
+          for (p2 = sc->w, f2 = a; cdr(f1) != f2; f2 = cdr(f2), p2 = cdr(p2))
+            clear_match_pair(f2);
+          for (f1 = f2; is_pair(f1); f1 = cdr(f1), f2 = cdr(f2))
+            {
+              clear_match_pair(f1);
+              f1 = cdr(f1);
+              clear_match_pair(f1);
+              if (f1 == f2) break;
+            }
+          clear_match_pair(a);
+          if (is_null(p1))
+            set_cdr(p2, p2);
+          else set_cdr(p1, p2);
+          wrap_return(sc->w);
+        }}
   wrap_return(sc->w);
 }
 
@@ -11783,13 +11783,13 @@ static void copy_stack_list_set_immutable(s7_pointer pold, s7_pointer pnew)
     {
       if (is_immutable(p1)) set_immutable(p2);
       if (is_pair(cdr(p1)))
-	{
-	  p1 = cdr(p1);
-	  p2 = cdr(p2);
-	  if (is_immutable(p1)) set_immutable(p2);
-	  if (p1 == slow) break;
-	  slow = cdr(slow);
-	}}
+        {
+          p1 = cdr(p1);
+          p2 = cdr(p2);
+          if (is_immutable(p1)) set_immutable(p2);
+          if (p1 == slow) break;
+          slow = cdr(slow);
+        }}
 }
 
 static s7_pointer copy_stack(s7_scheme *sc, s7_pointer new_v, s7_pointer old_v, int64_t top)
@@ -11804,45 +11804,45 @@ static s7_pointer copy_stack(s7_scheme *sc, s7_pointer new_v, s7_pointer old_v,
   if (stack_has_counters(old_v))
     {
       for (int64_t i = 2; i < top; i += 4)
-	{
-	  s7_pointer p = ov[i];                               /* args */
-	  /* if op_gc_protect, any ov[i] (except op) can be a list, but it isn't the arglist, so it seems to be safe */
-	  if (is_pair(p))                          /* args need not be a list (it can be a port or #f, etc) */
-	    {
-	      has_pairs = true;
-	      if (is_null(cdr(p)))
-		nv[i] = cons_unchecked(sc, car(p), sc->nil); /* GC is off -- could uncheck list_2 et al also */
-	      else
-		if ((is_pair(cdr(p))) && (is_null(cddr(p))))
-		  nv[i] = list_2_unchecked(sc, car(p), cadr(p));
-		else nv[i] = copy_any_list(sc, p);  /* args (copy is needed -- see s7test.scm) */
-	      /* if op=eval_args4 for example, this has to be a proper list, and in many cases it doesn't need to be copied */
-	      copy_stack_list_set_immutable(p, nv[i]);
-	    }
-	  /* lst can be dotted or circular here.  The circular list only happens in a case like:
-	   *    (dynamic-wind (lambda () (eq? (let ((lst (cons 1 2))) (set-cdr! lst lst) lst) (call/cc (lambda (k) k)))) (lambda () #f) (lambda () #f))
-	   *    proper_list_reverse_in_place(sc->args) is one reason we need to copy, another reuse_as_let
-	   */
-	  else
-	    if (is_counter(p))                  /* these can only occur in this context (not in a list etc) */
-	      {
-		stack_set_has_counters(new_v);
-		nv[i] = copy_counter(sc, p);
-	      }}}
+        {
+          s7_pointer p = ov[i];                               /* args */
+          /* if op_gc_protect, any ov[i] (except op) can be a list, but it isn't the arglist, so it seems to be safe */
+          if (is_pair(p))                          /* args need not be a list (it can be a port or #f, etc) */
+            {
+              has_pairs = true;
+              if (is_null(cdr(p)))
+                nv[i] = cons_unchecked(sc, car(p), sc->nil); /* GC is off -- could uncheck list_2 et al also */
+              else
+                if ((is_pair(cdr(p))) && (is_null(cddr(p))))
+                  nv[i] = list_2_unchecked(sc, car(p), cadr(p));
+                else nv[i] = copy_any_list(sc, p);  /* args (copy is needed -- see s7test.scm) */
+              /* if op=eval_args4 for example, this has to be a proper list, and in many cases it doesn't need to be copied */
+              copy_stack_list_set_immutable(p, nv[i]);
+            }
+          /* lst can be dotted or circular here.  The circular list only happens in a case like:
+           *    (dynamic-wind (lambda () (eq? (let ((lst (cons 1 2))) (set-cdr! lst lst) lst) (call/cc (lambda (k) k)))) (lambda () #f) (lambda () #f))
+           *    proper_list_reverse_in_place(sc->args) is one reason we need to copy, another reuse_as_let
+           */
+          else
+            if (is_counter(p))                  /* these can only occur in this context (not in a list etc) */
+              {
+                stack_set_has_counters(new_v);
+                nv[i] = copy_counter(sc, p);
+              }}}
   else
     for (int64_t i = 2; i < top; i += 4)
       if (is_pair(ov[i]))
-	{
-	  s7_pointer p = ov[i];
-	  has_pairs = true;
-	  if (is_null(cdr(p)))
-	    nv[i] = cons_unchecked(sc, car(p), sc->nil);
-	  else
-	    if ((is_pair(cdr(p))) && (is_null(cddr(p))))
-	      nv[i] = list_2_unchecked(sc, car(p), cadr(p));
-	    else nv[i] = copy_any_list(sc, p);  /* args (copy is needed -- see s7test.scm) */
-	  copy_stack_list_set_immutable(p, nv[i]);
-	}
+        {
+          s7_pointer p = ov[i];
+          has_pairs = true;
+          if (is_null(cdr(p)))
+            nv[i] = cons_unchecked(sc, car(p), sc->nil);
+          else
+            if ((is_pair(cdr(p))) && (is_null(cddr(p))))
+              nv[i] = list_2_unchecked(sc, car(p), cadr(p));
+            else nv[i] = copy_any_list(sc, p);  /* args (copy is needed -- see s7test.scm) */
+          copy_stack_list_set_immutable(p, nv[i]);
+        }
   if (has_pairs) stack_set_has_pairs(new_v);
   s7_gc_on(sc, true);
   return(new_v);
@@ -11873,8 +11873,8 @@ static bool find_baffle(s7_scheme *sc, s7_int key)
   if (sc->baffle_ctr > 0)
     for (s7_pointer x = sc->curlet; x; x = let_outlet(x))
       if ((is_baffle_let(x)) &&
-	  (let_baffle_key(x) == key))
-	return(true);
+          (let_baffle_key(x) == key))
+        return(true);
   return(false);
 }
 
@@ -11886,7 +11886,7 @@ static s7_int find_any_baffle(s7_scheme *sc)
   if (sc->baffle_ctr > 0)
     for (s7_pointer x = sc->curlet; x; x = let_outlet(x))
       if (is_baffle_let(x))
-	return(let_baffle_key(x));
+        return(let_baffle_key(x));
   return(NOT_BAFFLED);
 }
 
@@ -11919,7 +11919,7 @@ static void make_room_for_cc_stack(s7_scheme *sc)
     {
       call_gc(sc);
       if ((int64_t)(sc->free_heap_top - sc->free_heap) < (int64_t)(sc->heap_size / 8))
-	resize_heap(sc);
+        resize_heap(sc);
     }
 }
 
@@ -11981,91 +11981,91 @@ static bool check_for_dynamic_winds(s7_scheme *sc, s7_pointer c)
     {
       opcode_t op = stack_op(sc->stack, i);
       switch (op)
-	{
-	case OP_DYNAMIC_WIND:
-	case OP_LET_TEMP_DONE:
-	  {
-	    s7_pointer x = stack_code(sc->stack, i);
-	    int64_t s_base = 0;
-	    for (int64_t j = 3; j < top2; j += 4)
-	      if (((stack_op(continuation_stack(c), j) == OP_DYNAMIC_WIND) ||
-		   (stack_op(continuation_stack(c), j) == OP_LET_TEMP_DONE)) &&
-		  (x == stack_code(continuation_stack(c), j)))
-		{
-		  s_base = i;
-		  break;
-		}
-	    if (s_base == 0)
-	      {
-		if (op == OP_DYNAMIC_WIND)
-		  {
-		    if (dynamic_wind_state(x) == DWIND_BODY)
-		      {
-			dynamic_wind_state(x) = DWIND_FINISH;
-			if (dynamic_wind_out(x) != sc->F)
-			  sc->value = s7_call(sc, dynamic_wind_out(x), sc->nil);
-			/* free_cell is unsafe here and below */
-		      }}
-		else let_temp_done(sc, stack_args(sc->stack, i), T_Let(stack_let(sc->stack, i)));
-	      }}
-	  break;
-
-	case OP_DYNAMIC_UNWIND:
-	case OP_DYNAMIC_UNWIND_PROFILE:
-	  set_stack_op(sc->stack, i, OP_GC_PROTECT);
-	  break;
-
-	case OP_LET_TEMP_UNWIND:
-	  let_temp_unwind(sc, stack_code(sc->stack, i), stack_args(sc->stack, i));
-	  break;
-
-	case OP_LET_TEMP_S7_UNWIND:
-	  s7_starlet_set_1(sc, T_Sym(stack_code(sc->stack, i)), stack_args(sc->stack, i));
-	  break;
-
-	case OP_LET_TEMP_S7_DIRECT_UNWIND:
-	  sc->has_openlets = (stack_args(sc->stack, i) != sc->F);
-	  break;
-
-	case OP_BARRIER:
-	  if (i > top2)                       /* otherwise it's some unproblematic outer eval-string? */
-	    return(false);                    /*    but what if we've already evaluated a dynamic-wind closer? */
-	  break;
-
-	case OP_DEACTIVATE_GOTO:              /* here we're jumping out of an unrelated call-with-exit block */
-	  if (i > top2)
-	    call_exit_active(stack_args(sc->stack, i)) = false;
-	  break;
-
-	case OP_UNWIND_INPUT:
-	  if (stack_args(sc->stack, i) != sc->unused)
-	    set_current_input_port(sc, stack_args(sc->stack, i));         /* "args" = port that we shadowed */
-	  break;
-
-	case OP_UNWIND_OUTPUT:
-	  if (stack_args(sc->stack, i) != sc->unused)
-	    set_current_output_port(sc, stack_args(sc->stack, i));        /* "args" = port that we shadowed */
-	  break;
-
-	default:
-	  if ((S7_DEBUGGING) && (op == OP_MAP_UNWIND)) fprintf(stderr, "%s[%d]: unwind %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr);
-	  break;
-	}}
+        {
+        case OP_DYNAMIC_WIND:
+        case OP_LET_TEMP_DONE:
+          {
+            s7_pointer x = stack_code(sc->stack, i);
+            int64_t s_base = 0;
+            for (int64_t j = 3; j < top2; j += 4)
+              if (((stack_op(continuation_stack(c), j) == OP_DYNAMIC_WIND) ||
+                   (stack_op(continuation_stack(c), j) == OP_LET_TEMP_DONE)) &&
+                  (x == stack_code(continuation_stack(c), j)))
+                {
+                  s_base = i;
+                  break;
+                }
+            if (s_base == 0)
+              {
+                if (op == OP_DYNAMIC_WIND)
+                  {
+                    if (dynamic_wind_state(x) == DWIND_BODY)
+                      {
+                        dynamic_wind_state(x) = DWIND_FINISH;
+                        if (dynamic_wind_out(x) != sc->F)
+                          sc->value = s7_call(sc, dynamic_wind_out(x), sc->nil);
+                        /* free_cell is unsafe here and below */
+                      }}
+                else let_temp_done(sc, stack_args(sc->stack, i), T_Let(stack_let(sc->stack, i)));
+              }}
+          break;
+
+        case OP_DYNAMIC_UNWIND:
+        case OP_DYNAMIC_UNWIND_PROFILE:
+          set_stack_op(sc->stack, i, OP_GC_PROTECT);
+          break;
+
+        case OP_LET_TEMP_UNWIND:
+          let_temp_unwind(sc, stack_code(sc->stack, i), stack_args(sc->stack, i));
+          break;
+
+        case OP_LET_TEMP_S7_UNWIND:
+          s7_starlet_set_1(sc, T_Sym(stack_code(sc->stack, i)), stack_args(sc->stack, i));
+          break;
+
+        case OP_LET_TEMP_S7_DIRECT_UNWIND:
+          sc->has_openlets = (stack_args(sc->stack, i) != sc->F);
+          break;
+
+        case OP_BARRIER:
+          if (i > top2)                       /* otherwise it's some unproblematic outer eval-string? */
+            return(false);                    /*    but what if we've already evaluated a dynamic-wind closer? */
+          break;
+
+        case OP_DEACTIVATE_GOTO:              /* here we're jumping out of an unrelated call-with-exit block */
+          if (i > top2)
+            call_exit_active(stack_args(sc->stack, i)) = false;
+          break;
+
+        case OP_UNWIND_INPUT:
+          if (stack_args(sc->stack, i) != sc->unused)
+            set_current_input_port(sc, stack_args(sc->stack, i));         /* "args" = port that we shadowed */
+          break;
+
+        case OP_UNWIND_OUTPUT:
+          if (stack_args(sc->stack, i) != sc->unused)
+            set_current_output_port(sc, stack_args(sc->stack, i));        /* "args" = port that we shadowed */
+          break;
+
+        default:
+          if ((S7_DEBUGGING) && (op == OP_MAP_UNWIND)) fprintf(stderr, "%s[%d]: unwind %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr);
+          break;
+        }}
 
   /* check continuation-stack for dynamic-winds we're jumping into */
   for (int64_t i = stack_top(sc) - 1; i < top2; i += 4)
     {
       opcode_t op = stack_op(continuation_stack(c), i);
       if (op == OP_DYNAMIC_WIND)
-	{
-	  s7_pointer x = T_Dyn(stack_code(continuation_stack(c), i));
-	  if (dynamic_wind_in(x) != sc->F)
-	    sc->value = s7_call(sc, dynamic_wind_in(x), sc->nil);
-	  dynamic_wind_state(x) = DWIND_BODY;
-	}
+        {
+          s7_pointer x = T_Dyn(stack_code(continuation_stack(c), i));
+          if (dynamic_wind_in(x) != sc->F)
+            sc->value = s7_call(sc, dynamic_wind_in(x), sc->nil);
+          dynamic_wind_state(x) = DWIND_BODY;
+        }
       else
-	if (op == OP_DEACTIVATE_GOTO)
-	  call_exit_active(stack_args(continuation_stack(c), i)) = true;
+        if (op == OP_DEACTIVATE_GOTO)
+          call_exit_active(stack_args(continuation_stack(c), i)) = true;
       /* not let_temp_done here! */
       /* if op == OP_LET_TEMP_DONE, we're jumping back into a let-temporarily.  MIT and Chez scheme say they remember the
        *   let-temp vars (fluid-let or parameters in their terminology) at the point of the call/cc, and restore them
@@ -12091,38 +12091,38 @@ static void call_with_current_continuation(s7_scheme *sc)
   if ((continuation_key(c) != NOT_BAFFLED) &&
       (!(find_baffle(sc, continuation_key(c)))))
     error_nr(sc, sc->baffled_symbol,
-	     (is_symbol(continuation_name(sc->code))) ?
-	     set_elist_2(sc, wrap_string(sc, "continuation ~S can't jump into with-baffle", 43), continuation_name(sc->code)) :
-	     set_elist_1(sc, wrap_string(sc, "continuation can't jump into with-baffle", 40)));
+             (is_symbol(continuation_name(sc->code))) ?
+             set_elist_2(sc, wrap_string(sc, "continuation ~S can't jump into with-baffle", 43), continuation_name(sc->code)) :
+             set_elist_1(sc, wrap_string(sc, "continuation can't jump into with-baffle", 40)));
 
   if (check_for_dynamic_winds(sc, c))
     {
       /* make_room_for_cc_stack(sc); */ /* 28-May-21 */
       /* we push_stack sc->code before calling an embedded eval above, so sc->code should still be c here, etc */
       if ((stack_has_pairs(continuation_stack(c))) ||
-	  (stack_has_counters(continuation_stack(c))))
-	{
-	  make_room_for_cc_stack(sc);
-	  copy_stack(sc, sc->stack, continuation_stack(c), continuation_stack_top(c));
-	}
+          (stack_has_counters(continuation_stack(c))))
+        {
+          make_room_for_cc_stack(sc);
+          copy_stack(sc, sc->stack, continuation_stack(c), continuation_stack_top(c));
+        }
       else
-	{
-	  s7_pointer *nv = stack_elements(sc->stack);
-	  s7_pointer *ov = stack_elements(continuation_stack(c));
-	  memcpy((void *)nv, (void *)ov, continuation_stack_top(c) * sizeof(s7_pointer));
-	}
+        {
+          s7_pointer *nv = stack_elements(sc->stack);
+          s7_pointer *ov = stack_elements(continuation_stack(c));
+          memcpy((void *)nv, (void *)ov, continuation_stack_top(c) * sizeof(s7_pointer));
+        }
       /* copy_stack(sc, sc->stack, continuation_stack(c), continuation_stack_top(c)); */
       sc->stack_end = (s7_pointer *)(sc->stack_start + continuation_stack_top(c));
 
       {
-	int32_t top = continuation_op_loc(c);
-	s7_pointer *src, *dst;
-	sc->op_stack_now = (s7_pointer *)(sc->op_stack + top);
-	sc->op_stack_size = continuation_op_size(c);
-	sc->op_stack_end = (s7_pointer *)(sc->op_stack + sc->op_stack_size);
-	src = (s7_pointer *)vector_elements(continuation_op_stack(c));
-	dst = sc->op_stack;
-	for (int32_t i = 0; i < top; i++) dst[i] = src[i];
+        int32_t top = continuation_op_loc(c);
+        s7_pointer *src, *dst;
+        sc->op_stack_now = (s7_pointer *)(sc->op_stack + top);
+        sc->op_stack_size = continuation_op_size(c);
+        sc->op_stack_end = (s7_pointer *)(sc->op_stack + sc->op_stack_size);
+        src = (s7_pointer *)vector_elements(continuation_op_stack(c));
+        dst = sc->op_stack;
+        for (int32_t i = 0; i < top; i++) dst[i] = src[i];
       }
       sc->value = (is_null(sc->args)) ? sc->nil : ((is_null(cdr(sc->args))) ? car(sc->args) : splice_in_values(sc, sc->args));
     }
@@ -12144,7 +12144,7 @@ static s7_pointer g_call_cc(s7_scheme *sc, s7_pointer args)
        (closure_arity(p) != 1)) &&
       (!s7_is_aritable(sc, p, 1)))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "call/cc procedure, ~A, should take one argument", 47), p));
+             set_elist_2(sc, wrap_string(sc, "call/cc procedure, ~A, should take one argument", 47), p));
 
   sc->w = s7_make_continuation(sc);
   if ((is_any_closure(p)) && (is_pair(closure_args(p))) && (is_symbol(car(closure_args(p)))))
@@ -12190,7 +12190,7 @@ static void call_with_exit(s7_scheme *sc)
 
   if (!call_exit_active(sc->code))
     error_nr(sc, sc->invalid_escape_function_symbol,
-	     set_elist_1(sc, wrap_string(sc, "call-with-exit escape procedure called outside its block", 56)));
+             set_elist_1(sc, wrap_string(sc, "call-with-exit escape procedure called outside its block", 56)));
 
   call_exit_active(sc->code) = false;
   new_stack_top = call_exit_goto_loc(sc->code);
@@ -12202,83 +12202,83 @@ static void call_with_exit(s7_scheme *sc)
     switch (stack_op(sc->stack, i)) /* avoidable if we group these ops at the end and use op< */
       {
       case OP_DYNAMIC_WIND:
-	{
-	  s7_pointer lx = T_Dyn(stack_code(sc->stack, i));
-	  if (dynamic_wind_state(lx) == DWIND_BODY)
-	    {
-	      dynamic_wind_state(lx) = DWIND_FINISH;
-	      if (dynamic_wind_out(lx) != sc->F)
-		{
-		  s7_pointer arg = (sc->args == sc->plist_1) ? car(sc->plist_1) : sc->unused;  /* might also need GC protection here */
-		  /* protect the sc->args value across this call if it is sc->plist_1 -- I can't find a broken case */
-		  sc->value = s7_call(sc, dynamic_wind_out(lx), sc->nil);
-		  if (arg != sc->unused) set_plist_1(sc, arg);
-		}}}
-	break;
+        {
+          s7_pointer lx = T_Dyn(stack_code(sc->stack, i));
+          if (dynamic_wind_state(lx) == DWIND_BODY)
+            {
+              dynamic_wind_state(lx) = DWIND_FINISH;
+              if (dynamic_wind_out(lx) != sc->F)
+                {
+                  s7_pointer arg = (sc->args == sc->plist_1) ? car(sc->plist_1) : sc->unused;  /* might also need GC protection here */
+                  /* protect the sc->args value across this call if it is sc->plist_1 -- I can't find a broken case */
+                  sc->value = s7_call(sc, dynamic_wind_out(lx), sc->nil);
+                  if (arg != sc->unused) set_plist_1(sc, arg);
+                }}}
+        break;
 
       case OP_DYNAMIC_UNWIND:
       case OP_DYNAMIC_UNWIND_PROFILE:
-	set_stack_op(sc->stack, i, OP_GC_PROTECT);
-	dynamic_unwind(sc, stack_code(sc->stack, i), stack_args(sc->stack, i));
-	break;
+        set_stack_op(sc->stack, i, OP_GC_PROTECT);
+        dynamic_unwind(sc, stack_code(sc->stack, i), stack_args(sc->stack, i));
+        break;
 
       case OP_EVAL_STRING:
-	s7_close_input_port(sc, current_input_port(sc));
-	pop_input_port(sc);
-	break;
+        s7_close_input_port(sc, current_input_port(sc));
+        pop_input_port(sc);
+        break;
 
       case OP_BARRIER:                /* oops -- we almost certainly went too far */
-	goto SET_VALUE;
+        goto SET_VALUE;
 
       case OP_DEACTIVATE_GOTO:        /* here we're jumping into an unrelated call-with-exit block */
-	call_exit_active(stack_args(sc->stack, i)) = false;
-	break;
+        call_exit_active(stack_args(sc->stack, i)) = false;
+        break;
 
       case OP_LET_TEMP_DONE:
-	{
-	  s7_pointer old_args = sc->args;
-	  let_temp_done(sc, stack_args(sc->stack, i), T_Let(stack_let(sc->stack, i)));
-	  sc->args = old_args;
-	}
-	break;
+        {
+          s7_pointer old_args = sc->args;
+          let_temp_done(sc, stack_args(sc->stack, i), T_Let(stack_let(sc->stack, i)));
+          sc->args = old_args;
+        }
+        break;
 
       case OP_LET_TEMP_UNWIND:
-	let_temp_unwind(sc, stack_code(sc->stack, i), stack_args(sc->stack, i));
-	break;
+        let_temp_unwind(sc, stack_code(sc->stack, i), stack_args(sc->stack, i));
+        break;
 
       case OP_LET_TEMP_S7_UNWIND:
-	s7_starlet_set_1(sc, T_Sym(stack_code(sc->stack, i)), stack_args(sc->stack, i));
-	break;
+        s7_starlet_set_1(sc, T_Sym(stack_code(sc->stack, i)), stack_args(sc->stack, i));
+        break;
 
       case OP_LET_TEMP_S7_DIRECT_UNWIND:
-	sc->has_openlets = (stack_args(sc->stack, i) != sc->F);
-	break;
+        sc->has_openlets = (stack_args(sc->stack, i) != sc->F);
+        break;
 
-	/* call/cc does not close files, but I think call-with-exit should */
+        /* call/cc does not close files, but I think call-with-exit should */
       case OP_GET_OUTPUT_STRING:
       case OP_UNWIND_OUTPUT:
-	{
-	  s7_pointer x = T_Pro(stack_code(sc->stack, i));  /* "code" = port that we opened */
-	  s7_close_output_port(sc, x);
-	  x = stack_args(sc->stack, i);                    /* "args" = port that we shadowed, if not #<unused> */
-	  if (x != sc->unused)
-	    set_current_output_port(sc, x);
-	}
-	break;
+        {
+          s7_pointer x = T_Pro(stack_code(sc->stack, i));  /* "code" = port that we opened */
+          s7_close_output_port(sc, x);
+          x = stack_args(sc->stack, i);                    /* "args" = port that we shadowed, if not #<unused> */
+          if (x != sc->unused)
+            set_current_output_port(sc, x);
+        }
+        break;
 
       case OP_UNWIND_INPUT:
-	s7_close_input_port(sc, T_Pri(stack_code(sc->stack, i))); /* "code" = port that we opened */
-	if (stack_args(sc->stack, i) != sc->unused)
-	  set_current_input_port(sc, stack_args(sc->stack, i));   /* "args" = port that we shadowed */
-	break;
+        s7_close_input_port(sc, T_Pri(stack_code(sc->stack, i))); /* "code" = port that we opened */
+        if (stack_args(sc->stack, i) != sc->unused)
+          set_current_input_port(sc, stack_args(sc->stack, i));   /* "args" = port that we shadowed */
+        break;
 
       case OP_EVAL_DONE: /* goto called in a method -- put off the inner eval return(s) until we clean up the stack */
-	quit++;
-	break;
+        quit++;
+        break;
 
       default:
-	if ((S7_DEBUGGING) && (stack_op(sc->stack, i) == OP_MAP_UNWIND)) fprintf(stderr, "%s[%d]: unwind %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr);
-	break;
+        if ((S7_DEBUGGING) && (stack_op(sc->stack, i) == OP_MAP_UNWIND)) fprintf(stderr, "%s[%d]: unwind %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr);
+        break;
       }
     i -= 4;
   } while (i > new_stack_top);
@@ -12291,12 +12291,12 @@ static void call_with_exit(s7_scheme *sc)
   if (quit > 0)
     {
       if (sc->longjmp_ok)
-	{
-	  pop_stack(sc);
-	  LongJmp(*(sc->goto_start), CALL_WITH_EXIT_JUMP);
-	}
+        {
+          pop_stack(sc);
+          LongJmp(*(sc->goto_start), CALL_WITH_EXIT_JUMP);
+        }
       for (i = 0; i < quit; i++)
-	push_stack_op_let(sc, OP_EVAL_DONE);
+        push_stack_op_let(sc, OP_EVAL_DONE);
     }
 }
 
@@ -12336,10 +12336,10 @@ static s7_pointer g_call_with_exit(s7_scheme *sc, s7_pointer args)   /* (call-wi
     return(method_or_bust_p(sc, p, sc->call_with_exit_symbol, a_procedure_string));
   if (!s7_is_aritable(sc, p, 1))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "call-with-exit argument should be a function of one argument: ~S", 64), p));
+             set_elist_2(sc, wrap_string(sc, "call-with-exit argument should be a function of one argument: ~S", 64), p));
   if (is_continuation(p)) /* (call/cc call-with-exit) ! */
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "call-with-exit argument should be a normal function (not a continuation: ~S)", 76), p));
+             set_elist_2(sc, wrap_string(sc, "call-with-exit argument should be a normal function (not a continuation: ~S)", 76), p));
   x = make_goto(sc, sc->F);
   call_exit_active(x) = false;
   return((is_c_function(p)) ? c_function_call(p)(sc, set_plist_1(sc, x)) : s7_apply_function_star(sc, p, set_plist_1(sc, x)));
@@ -12799,7 +12799,7 @@ static bool is_integer_via_method(s7_scheme *sc, s7_pointer p)
     {
       s7_pointer f = find_method_with_let(sc, p, sc->is_integer_symbol);
       if (f != sc->undefined)
-	return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
+        return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
     }
   return(false);
 }
@@ -12995,8 +12995,8 @@ static block_t *mpc_to_string(s7_scheme *sc, mpc_t val, int32_t radix, use_write
   len = safe_strlen((char *)block_data(rl)) + safe_strlen((char *)block_data(im)) + 128;
   tmp = mallocate(sc, len);
   snprintf((char *)block_data(tmp), len, "%s%s%si",
-	   (char *)block_data(rl),
-	   ((((char *)block_data(im))[0] == '-') || (((char *)block_data(im))[0] == '+')) ? "" : "+", (char *)block_data(im));
+           (char *)block_data(rl),
+           ((((char *)block_data(im))[0] == '-') || (((char *)block_data(im))[0] == '+')) ? "" : "+", (char *)block_data(im));
 
   liberate(sc, rl);
   liberate(sc, im);
@@ -13029,16 +13029,16 @@ static block_t *big_number_to_string_with_radix(s7_scheme *sc, s7_pointer p, int
     {
       s7_int len = safe_strlen((char *)block_data(str));
       if (width > len)
-	{
-	  int32_t spaces = width - len;
-	  block_t *tmp = (block_t *)mallocate(sc, width + 1);
-	  ((char *)block_data(tmp))[width] = '\0';
-	  memmove((void *)((char *)block_data(tmp) + spaces), (void *)block_data(str), len);
-	  local_memset((void *)block_data(tmp), (int)' ', spaces);
-	  (*nlen) = width;
-	  liberate(sc, str);
-	  return(tmp);
-	}
+        {
+          int32_t spaces = width - len;
+          block_t *tmp = (block_t *)mallocate(sc, width + 1);
+          ((char *)block_data(tmp))[width] = '\0';
+          memmove((void *)((char *)block_data(tmp) + spaces), (void *)block_data(str), len);
+          local_memset((void *)block_data(tmp), (int)' ', spaces);
+          (*nlen) = width;
+          liberate(sc, str);
+          return(tmp);
+        }
       (*nlen) = len;
     }
   else (*nlen) = safe_strlen((char *)block_data(str));
@@ -13099,7 +13099,7 @@ static s7_pointer string_to_either_ratio(s7_scheme *sc, const char *nstr, const
       if (d == 0) return(real_NaN);
       n = string_to_integer(nstr, radix, &overflow);
       if (!overflow)
-	return(make_ratio(sc, n, d));
+        return(make_ratio(sc, n, d));
     }
   if (nstr[0] == '+')
     return(string_to_big_ratio(sc, (const char *)(nstr + 1), radix));
@@ -13134,26 +13134,26 @@ static s7_pointer string_to_either_complex_1(s7_scheme *sc, char *q, char *slash
   else
     {
       if (slash1)
-	{
-	  s7_int d, n = string_to_integer(q, radix, &overflow);  /* q can include the slash and denominator */
-	  if (overflow) return(string_to_big_ratio(sc, q, radix));
-	  d = string_to_integer(slash1, radix, &overflow);
-	  if (overflow) return(string_to_big_ratio(sc, q, radix));
-	  (*d_rl) = (s7_double)n / (s7_double)d;
-	}
+        {
+          s7_int d, n = string_to_integer(q, radix, &overflow);  /* q can include the slash and denominator */
+          if (overflow) return(string_to_big_ratio(sc, q, radix));
+          d = string_to_integer(slash1, radix, &overflow);
+          if (overflow) return(string_to_big_ratio(sc, q, radix));
+          (*d_rl) = (s7_double)n / (s7_double)d;
+        }
       else
-	{
-	  s7_int val = string_to_integer(q, radix, &overflow);
-	  if (overflow) return(string_to_big_integer(sc, q, radix));
-	  (*d_rl) = (s7_double)val;
-	}}
+        {
+          s7_int val = string_to_integer(q, radix, &overflow);
+          if (overflow) return(string_to_big_integer(sc, q, radix));
+          (*d_rl) = (s7_double)val;
+        }}
   if ((*d_rl) == -0.0) (*d_rl) = 0.0;
   return(NULL);
 }
 
 static s7_pointer string_to_either_complex(s7_scheme *sc, char *q, char *slash1, char *ex1, bool has_dec_point1,
-					   char *plus, char *slash2, char *ex2, bool has_dec_point2,
-					   int32_t radix, int32_t has_plus_or_minus)
+                                           char *plus, char *slash2, char *ex2, bool has_dec_point2,
+                                           int32_t radix, int32_t has_plus_or_minus)
 {
   /* this can be just about anything involving 2 real/ratio/int portions, +/- in between and 'i' at the end */
   double d_rl = 0.0, d_im = 0.0;
@@ -13210,24 +13210,24 @@ static bool big_numbers_are_eqv(s7_scheme *sc, s7_pointer a, s7_pointer b)
       if ((is_NaN(real_part(a))) || (is_NaN(imag_part(a)))) return(false);
       if (!is_t_big_complex(b)) return(false);
       if ((mpfr_nan_p(mpc_realref(big_complex(b)))) || (mpfr_nan_p(mpc_imagref(big_complex(b)))))
-	return(false);
+        return(false);
       mpc_set_d_d(sc->mpc_1, real_part(a), imag_part(a), MPC_RNDNN);
       return(mpc_cmp(sc->mpc_1, big_complex(b)) == 0);
     case T_BIG_COMPLEX:
       if ((mpfr_nan_p(mpc_realref(big_complex(a)))) || (mpfr_nan_p(mpc_imagref(big_complex(a)))))
-	return(false);
+        return(false);
       if (is_t_big_complex(b))
-	{
-	  if ((mpfr_nan_p(mpc_realref(big_complex(b)))) || (mpfr_nan_p(mpc_imagref(big_complex(b)))))
-	    return(false);
-	  return(mpc_cmp(big_complex(a), big_complex(b)) == 0);
-	}
+        {
+          if ((mpfr_nan_p(mpc_realref(big_complex(b)))) || (mpfr_nan_p(mpc_imagref(big_complex(b)))))
+            return(false);
+          return(mpc_cmp(big_complex(a), big_complex(b)) == 0);
+        }
       if (is_t_complex(b))
-	{
-	  if ((is_NaN(real_part(b))) || (is_NaN(imag_part(b)))) return(false);
-	  mpc_set_d_d(sc->mpc_2, real_part(b), imag_part(b), MPC_RNDNN);
-	  return(mpc_cmp(big_complex(a), sc->mpc_1) == 0);
-	}}
+        {
+          if ((is_NaN(real_part(b))) || (is_NaN(imag_part(b)))) return(false);
+          mpc_set_d_d(sc->mpc_2, real_part(b), imag_part(b), MPC_RNDNN);
+          return(mpc_cmp(big_complex(a), sc->mpc_1) == 0);
+        }}
   return(false);
 }
 
@@ -13430,11 +13430,11 @@ static s7_int c_gcd(s7_int u, s7_int v)
       s7_int divisor = 1;
       if (u == v) return(u);
       while (((u & 1) == 0) && ((v & 1) == 0))
-	{
-	  u /= 2;
-	  v /= 2;
-	  divisor *= 2;
-	}
+        {
+          u /= 2;
+          v /= 2;
+          divisor *= 2;
+        }
       return(divisor);
     }
   a = s7_int_abs(u);
@@ -13485,7 +13485,7 @@ static bool c_rationalize(s7_double ux, s7_double error, s7_int *numer, s7_int *
   if (error >= 1.0) /* aw good grief! */
     {
       if (x0 < 0.0)
-	(*numer) = (x1 < 0.0) ? (s7_int)floor(x1) : 0;
+        (*numer) = (x1 < 0.0) ? (s7_int)floor(x1) : 0;
       else (*numer) = i;
       (*denom) = 1;
       return(true);
@@ -13510,20 +13510,20 @@ static bool c_rationalize(s7_double ux, s7_double error, s7_int *numer, s7_int *
       double val = (double)p0 / (double)q0;
 
       if (((x0 <= val) && (val <= x1)) || (e1 == 0.0) || (e1p == 0.0) || (tries > 100))
-	{
-	  if ((q0 == s7_int_min) && (p0 == 1)) /* (rationalize 1.000000004297917e-12) when error is 1e-12 */
-	    {
-	      (*numer) = 0;
-	      (*denom) = 1;
-	    }
-	  else
-	    {
-	      (*numer) = p0;
-	      (*denom) = q0;
-	      if ((S7_DEBUGGING) && (q0 == 0)) fprintf(stderr, "%f %" ld64 "/0\n", ux, p0);
-	    }
-	  return(true);
-	}
+        {
+          if ((q0 == s7_int_min) && (p0 == 1)) /* (rationalize 1.000000004297917e-12) when error is 1e-12 */
+            {
+              (*numer) = 0;
+              (*denom) = 1;
+            }
+          else
+            {
+              (*numer) = p0;
+              (*denom) = q0;
+              if ((S7_DEBUGGING) && (q0 == 0)) fprintf(stderr, "%f %" ld64 "/0\n", ux, p0);
+            }
+          return(true);
+        }
       tries++;
       r = (s7_int)floor(e0 / e1);
       r1 = (s7_int)ceil(e0p / e1p);
@@ -13621,13 +13621,13 @@ static inline s7_pointer c_complex_to_s7(s7_scheme *sc, s7_complex z) {return(ma
 static noreturn void division_by_zero_error_1_nr(s7_scheme *sc, s7_pointer caller, s7_pointer x)
 {
   error_nr(sc, sc->division_by_zero_symbol,
-	   set_elist_4(sc, wrap_string(sc, "~A: division by zero, (~A ~S)", 29), caller, caller, x));
+           set_elist_4(sc, wrap_string(sc, "~A: division by zero, (~A ~S)", 29), caller, caller, x));
 }
 
 static noreturn void division_by_zero_error_2_nr(s7_scheme *sc, s7_pointer caller, s7_pointer x, s7_pointer y)
 {
   error_nr(sc, sc->division_by_zero_symbol,
-	   set_elist_5(sc, wrap_string(sc, "~A: division by zero, (~A ~S ~S)", 32), caller, caller, x, y));
+           set_elist_5(sc, wrap_string(sc, "~A: division by zero, (~A ~S ~S)", 32), caller, caller, x, y));
 }
 
 static s7_pointer make_ratio(s7_scheme *sc, s7_int a, s7_int b)
@@ -13639,7 +13639,7 @@ static s7_pointer make_ratio(s7_scheme *sc, s7_int a, s7_int b)
        *   ratio on a switch with-bignums or whatever, so its mere occurrence is just an annoyance.
        */
       if (a & 1)
-	return(make_real(sc, (long_double)a / (long_double)b));
+        return(make_real(sc, (long_double)a / (long_double)b));
       a /= 2;
       b /= 2;
     }
@@ -13651,23 +13651,23 @@ static s7_pointer make_ratio(s7_scheme *sc, s7_int a, s7_int b)
   if (a == s7_int_min)
     {
       while (((a & 1) == 0) && ((b & 1) == 0))
-	{
-	  a /= 2;
-	  b /= 2;
-	}}
+        {
+          a /= 2;
+          b /= 2;
+        }}
   else
     {
       s7_int b1 = b, divisor = s7_int_abs(a);
       do {
-	s7_int temp = divisor % b1;
-	divisor = b1;
-	b1 = temp;
+        s7_int temp = divisor % b1;
+        divisor = b1;
+        b1 = temp;
       } while (b1 != 0);
       if (divisor != 1)
-	{
-	  a /= divisor;
-	  b /= divisor;
-	}}
+        {
+          a /= divisor;
+          b /= divisor;
+        }}
   if (b == 1)
     return(make_integer(sc, a));
 
@@ -13727,7 +13727,7 @@ s7_double s7_number_to_real_with_caller(s7_scheme *sc, s7_pointer x, const char
 #if WITH_GMP
     case T_BIG_INTEGER: return((s7_double)big_integer_to_s7_int(sc, big_integer(x)));
     case T_BIG_RATIO:   return((s7_double)((long_double)big_integer_to_s7_int(sc, mpq_numref(big_ratio(x))) /
-					   (long_double)big_integer_to_s7_int(sc, mpq_denref(big_ratio(x)))));
+                                           (long_double)big_integer_to_s7_int(sc, mpq_denref(big_ratio(x)))));
     case T_BIG_REAL:    return((s7_double)mpfr_get_d(big_real(x), MPFR_RNDN));
 #endif
     default:
@@ -13746,7 +13746,7 @@ s7_double s7_number_to_real_with_location(s7_scheme *sc, s7_pointer x, s7_pointe
 #if WITH_GMP
     case T_BIG_INTEGER: return((s7_double)big_integer_to_s7_int(sc, big_integer(x)));
     case T_BIG_RATIO:   return((s7_double)((long_double)big_integer_to_s7_int(sc, mpq_numref(big_ratio(x))) /
-					   (long_double)big_integer_to_s7_int(sc, mpq_denref(big_ratio(x)))));
+                                           (long_double)big_integer_to_s7_int(sc, mpq_denref(big_ratio(x)))));
     case T_BIG_REAL:    return((s7_double)mpfr_get_d(big_real(x), MPFR_RNDN));
 #endif
     default:
@@ -13813,13 +13813,13 @@ s7_double s7_real(s7_pointer x)
     case T_BIG_REAL:    return((s7_double)mpfr_get_d(big_real(x), MPFR_RNDN));
     case T_BIG_RATIO:
       {
-	s7_double result;
-	mpfr_t bx;
-	mpfr_init2(bx, DEFAULT_BIGNUM_PRECISION);
-	mpfr_set_q(bx, big_ratio(x), MPFR_RNDN);
-	result = mpfr_get_d(bx, MPFR_RNDN);
-	mpfr_clear(bx);
-	return(result);
+        s7_double result;
+        mpfr_t bx;
+        mpfr_init2(bx, DEFAULT_BIGNUM_PRECISION);
+        mpfr_set_q(bx, big_ratio(x), MPFR_RNDN);
+        result = mpfr_get_d(bx, MPFR_RNDN);
+        mpfr_clear(bx);
+        return(result);
       }
 #endif
     }
@@ -13829,7 +13829,7 @@ s7_double s7_real(s7_pointer x)
 static bool is_one(s7_pointer x)
 {
   return(((is_t_integer(x)) && (integer(x) == 1)) ||
-	 ((is_t_real(x)) && (real(x) == 1.0)));
+         ((is_t_real(x)) && (real(x) == 1.0)));
 }
 
 
@@ -13932,14 +13932,14 @@ static dtoa_np dtoa_find_cachedpow10(int exp, int* k)
     {
       int32_t current = exp + dtoa_powers_ten[idx].exp + 64;
       if (current < dtoa_expmin)
-	{
-	  idx++;
-	  continue;
+        {
+          idx++;
+          continue;
         }
       if (current > dtoa_expmax)
-	{
-	  idx--;
-	  continue;
+        {
+          idx--;
+          continue;
         }
       *k = (dtoa_firstpower + idx * dtoa_steppowers);
       return(dtoa_powers_ten[idx]);
@@ -14035,7 +14035,7 @@ static dtoa_np dtoa_multiply(dtoa_np* a, dtoa_np* b)
 static void dtoa_round_digit(char* digits, int32_t ndigits, uint64_t delta, uint64_t rem, uint64_t kappa, uint64_t frac)
 {
   while ((rem < frac) && (delta - rem >= kappa) &&
-	 ((rem + kappa < frac) || (frac - rem > rem + kappa - frac)))
+         ((rem + kappa < frac) || (frac - rem > rem + kappa - frac)))
     {
       digits[ndigits - 1]--;
       rem += kappa;
@@ -14060,15 +14060,15 @@ static int32_t dtoa_generate_digits(dtoa_np* fp, dtoa_np* upper, dtoa_np* lower,
       uint64_t tmp, div = *divp;
       unsigned digit = part1 / div;
       if (digit || idx)
-	digits[idx++] = digit + '0';
+        digits[idx++] = digit + '0';
       part1 -= digit * div;
       kappa--;
       tmp = (part1 << -one.exp) + part2;
       if (tmp <= delta)
-	{
-	  *K += kappa;
-	  dtoa_round_digit(digits, idx, delta, tmp, div << -one.exp, wfrac);
-	  return(idx);
+        {
+          *K += kappa;
+          dtoa_round_digit(digits, idx, delta, tmp, div << -one.exp, wfrac);
+          return(idx);
         }}
 
   /* 10 */
@@ -14081,14 +14081,14 @@ static int32_t dtoa_generate_digits(dtoa_np* fp, dtoa_np* upper, dtoa_np* lower,
       kappa--;
       digit = part2 >> -one.exp;
       if (digit || idx)
-	digits[idx++] = digit + '0';
+        digits[idx++] = digit + '0';
       part2 &= one.frac - 1;
       if (part2 < delta)
-	{
-	  *K += kappa;
-	  dtoa_round_digit(digits, idx, delta, part2, one.frac, wfrac * *unit);
-	  return(idx);
-	}
+        {
+          *K += kappa;
+          dtoa_round_digit(digits, idx, delta, part2, one.frac, wfrac * *unit);
+          return(idx);
+        }
       unit--;
     }
 }
@@ -14132,22 +14132,22 @@ static int32_t dtoa_emit_digits(char* digits, int32_t ndigits, char* dest, int32
       int32_t offset = ndigits - dtoa_absv(K);
       /* fp < 1.0 -> write leading zero */
       if (offset <= 0)
-	{
-	  offset = -offset;
-	  dest[0] = '0';
-	  dest[1] = '.';
-	  local_memset(dest + 2, '0', offset);
-	  memcpy(dest + offset + 2, digits, ndigits);
-	  return(ndigits + 2 + offset);
-	  /* fp > 1.0 */
-	}
+        {
+          offset = -offset;
+          dest[0] = '0';
+          dest[1] = '.';
+          local_memset(dest + 2, '0', offset);
+          memcpy(dest + offset + 2, digits, ndigits);
+          return(ndigits + 2 + offset);
+          /* fp > 1.0 */
+        }
       else
-	{
-	  memcpy(dest, digits, offset);
-	  dest[offset] = '.';
-	  memcpy(dest + offset + 1, digits + offset, ndigits - offset);
-	  return(ndigits + 1);
-	}}
+        {
+          memcpy(dest, digits, offset);
+          dest[offset] = '.';
+          memcpy(dest + offset + 1, digits + offset, ndigits - offset);
+          return(ndigits + 1);
+        }}
 
   /* write decimal w/ scientific notation */
   ndigits = dtoa_minv(ndigits, 18 - neg);
@@ -14249,10 +14249,10 @@ static size_t integer_to_string_any_base(char *p, s7_int n, int32_t radix)  /* c
   if (n == S7_INT64_MIN) /* can't negate this, so do it by hand */
     {
       static const char *mnfs[17] = {"","",
-	"-1000000000000000000000000000000000000000000000000000000000000000", "-2021110011022210012102010021220101220222",
-	"-20000000000000000000000000000000", "-1104332401304422434310311213", "-1540241003031030222122212",
-	"-22341010611245052052301", "-1000000000000000000000", "-67404283172107811828",	"-9223372036854775808",
-	"-1728002635214590698",	"-41a792678515120368", "-10b269549075433c38", "-4340724c6c71dc7a8", "-160e2ad3246366808", "-8000000000000000"};
+        "-1000000000000000000000000000000000000000000000000000000000000000", "-2021110011022210012102010021220101220222",
+        "-20000000000000000000000000000000", "-1104332401304422434310311213", "-1540241003031030222122212",
+        "-22341010611245052052301", "-1000000000000000000000", "-67404283172107811828",        "-9223372036854775808",
+        "-1728002635214590698",        "-41a792678515120368", "-10b269549075433c38", "-4340724c6c71dc7a8", "-160e2ad3246366808", "-8000000000000000"};
 
       len = safe_strlen(mnfs[radix]);
       memcpy((void *)p, (const void *)mnfs[radix], len);
@@ -14270,7 +14270,7 @@ static size_t integer_to_string_any_base(char *p, s7_int n, int32_t radix)  /* c
   for (i = 1; i < 100; i++)
     {
       if (pown < radix)
-	break;
+        break;
       pown /= (s7_int)radix;
     }
   len = i - 1;
@@ -14344,17 +14344,17 @@ static char *floatify(char *str, s7_int *nlen)
       s7_int len = *nlen;
       /* snprintf returns "nan" and "inf" but we (stupidly) want "+nan.0" and "+inf.0"; "-nan" and "-inf" will be handled by the normal case */
       if (len == 3)
-	{
-	  if (str[0] == 'n')
-	    {
-	      str[0] = '+'; str[1] = 'n'; str[2] = 'a'; str[3] = 'n';
-	      len = 4;
-	    }
-	  if (str[0] == 'i')
-	    {
-	      str[0] = '+'; str[1] = 'i'; str[2] = 'n'; str[3] = 'f';
-	      len = 4;
-	    }}
+        {
+          if (str[0] == 'n')
+            {
+              str[0] = '+'; str[1] = 'n'; str[2] = 'a'; str[3] = 'n';
+              len = 4;
+            }
+          if (str[0] == 'i')
+            {
+              str[0] = '+'; str[1] = 'i'; str[2] = 'n'; str[3] = 'f';
+              len = 4;
+            }}
       str[len]='.';
       str[len + 1]='0';
       str[len + 2]='\0';
@@ -14377,7 +14377,7 @@ static void insert_spaces(s7_scheme *sc, const char *src, s7_int width, s7_int l
 }
 
 static char *number_to_string_base_10(s7_scheme *sc, s7_pointer obj, s7_int width, s7_int precision,
-				      char float_choice, s7_int *nlen, use_write_t choice) /* don't free result */
+                                      char float_choice, s7_int *nlen, use_write_t choice) /* don't free result */
 {
   /* called by number_to_string_with_radix g_number_to_string, number_to_string_p_p number_to_port format_number */
   /* the rest of s7 assumes nlen is set to the correct length
@@ -14397,21 +14397,21 @@ static char *number_to_string_base_10(s7_scheme *sc, s7_pointer obj, s7_int widt
     {
       const char *p;
       if (width == 0)
-	{
-	  if (has_number_name(obj))
-	    {
-	      (*nlen) = number_name_length(obj);
-	      return((char *)number_name(obj));
-	    }
-	  return((char *)integer_to_string(sc, integer(obj), nlen));
-	}
+        {
+          if (has_number_name(obj))
+            {
+              (*nlen) = number_name_length(obj);
+              return((char *)number_name(obj));
+            }
+          return((char *)integer_to_string(sc, integer(obj), nlen));
+        }
       p = integer_to_string(sc, integer(obj), &len);
       if (width > len)
-	{
-	  insert_spaces(sc, p, width, len); /* writes sc->num_to_str */
-	  (*nlen) = width;
-	  return(sc->num_to_str);
-	}
+        {
+          insert_spaces(sc, p, width, len); /* writes sc->num_to_str */
+          (*nlen) = width;
+          return(sc->num_to_str);
+        }
       (*nlen) = len;
       return((char *)p);
     }
@@ -14419,27 +14419,27 @@ static char *number_to_string_base_10(s7_scheme *sc, s7_pointer obj, s7_int widt
   if (is_t_real(obj))
     {
       if (width == 0)
-	{
+        {
 #if WITH_DTOA
-	  if ((float_choice == 'g') &&
-	      (precision == WRITE_REAL_PRECISION))
-	    {
-	      /* (number->string 0.0000001) is sensitive to (*s7* 'float-format-precision) and inconsistent: either 1e-7 or 0.0000001
-	       *    because fpconv_dtoa has some complicated decision about 'g' vs 'f' -- not sure if this is a bug.
-	       */
-	      len = fpconv_dtoa(real(obj), sc->num_to_str);
-	      sc->num_to_str[len] = '\0';
-	      (*nlen) = len;
-	      return(sc->num_to_str);
-	    }
-#endif
-	  len = snprintf(sc->num_to_str, sc->num_to_str_size - 4,
-			 (float_choice == 'g') ? "%.*g" : ((float_choice == 'f') ? "%.*f" : "%.*e"),
-			 (int32_t)precision, real(obj)); /* -4 for floatify */
-	}
+          if ((float_choice == 'g') &&
+              (precision == WRITE_REAL_PRECISION))
+            {
+              /* (number->string 0.0000001) is sensitive to (*s7* 'float-format-precision) and inconsistent: either 1e-7 or 0.0000001
+               *    because fpconv_dtoa has some complicated decision about 'g' vs 'f' -- not sure if this is a bug.
+               */
+              len = fpconv_dtoa(real(obj), sc->num_to_str);
+              sc->num_to_str[len] = '\0';
+              (*nlen) = len;
+              return(sc->num_to_str);
+            }
+#endif
+          len = snprintf(sc->num_to_str, sc->num_to_str_size - 4,
+                         (float_choice == 'g') ? "%.*g" : ((float_choice == 'f') ? "%.*f" : "%.*e"),
+                         (int32_t)precision, real(obj)); /* -4 for floatify */
+        }
       else len = snprintf(sc->num_to_str, sc->num_to_str_size - 4,
-			  (float_choice == 'g') ? "%*.*g" : ((float_choice == 'f') ? "%*.*f" : "%*.*e"),
-			  (int32_t)width, (int32_t)precision, real(obj)); /* -4 for floatify */
+                          (float_choice == 'g') ? "%*.*g" : ((float_choice == 'f') ? "%*.*f" : "%*.*e"),
+                          (int32_t)width, (int32_t)precision, real(obj)); /* -4 for floatify */
       (*nlen) = len;
       floatify(sc->num_to_str, nlen);
       return(sc->num_to_str);
@@ -14459,10 +14459,10 @@ static char *number_to_string_base_10(s7_scheme *sc, s7_pointer obj, s7_int widt
       free(imag);
 
       if (width > len)  /* (format #f "~20g" 1+i) */
-	{
-	  insert_spaces(sc, sc->num_to_str, width, len); /* this checks sc->num_to_str_size */
-	  (*nlen) = width;
-	}
+        {
+          insert_spaces(sc, sc->num_to_str, width, len); /* this checks sc->num_to_str_size */
+          (*nlen) = width;
+        }
       else (*nlen) = len;
       return(sc->num_to_str);
     }
@@ -14506,31 +14506,31 @@ static block_t *number_to_string_with_radix(s7_scheme *sc, s7_pointer obj, int32
     {
     case T_INTEGER:
       {
-	size_t len1;
-	b = inline_mallocate(sc, (128 + width));
-	p = (char *)block_data(b);
-	len1 = integer_to_string_any_base(p, integer(obj), radix);
-	if ((size_t)width > len1)
-	  {
-	    size_t start = width - len1;
-	    memmove((void *)(p + start), (void *)p, len1);
-	    local_memset((void *)p, (int)' ', start);
-	    p[width] = '\0';
-	    *nlen = width;
-	  }
-	else *nlen = len1;
-	return(b);
+        size_t len1;
+        b = inline_mallocate(sc, (128 + width));
+        p = (char *)block_data(b);
+        len1 = integer_to_string_any_base(p, integer(obj), radix);
+        if ((size_t)width > len1)
+          {
+            size_t start = width - len1;
+            memmove((void *)(p + start), (void *)p, len1);
+            local_memset((void *)p, (int)' ', start);
+            p[width] = '\0';
+            *nlen = width;
+          }
+        else *nlen = len1;
+        return(b);
       }
 
     case T_RATIO:
       {
-	size_t len1, len2;
-	str_len = 256 + width;
-	b = inline_mallocate(sc, str_len);
-	p = (char *)block_data(b);
-	len1 = integer_to_string_any_base(p, numerator(obj), radix);
-	p[len1] = '/';
-	len2 = integer_to_string_any_base((char *)(p + len1 + 1), denominator(obj), radix);
+        size_t len1, len2;
+        str_len = 256 + width;
+        b = inline_mallocate(sc, str_len);
+        p = (char *)block_data(b);
+        len1 = integer_to_string_any_base(p, numerator(obj), radix);
+        p[len1] = '/';
+        len2 = integer_to_string_any_base((char *)(p + len1 + 1), denominator(obj), radix);
         len = len1 + 1 + len2;
         p[len] = '\0';
       }
@@ -14538,97 +14538,97 @@ static block_t *number_to_string_with_radix(s7_scheme *sc, s7_pointer obj, int32
 
     case T_REAL:
       {
-	int32_t i;
-	s7_int int_part, nsize;
-	s7_double x = real(obj), frac_part, min_frac, base;
-	bool sign = false;
-	char n[128], d[256];
-
-	if (is_NaN(x))
-	  return(string_to_block(sc, "+nan.0", *nlen = 6));
-	if (is_inf(x))
-	  {
-	    if (x < 0.0)
-	      return(string_to_block(sc, "-inf.0", *nlen = 6));
-	    return(string_to_block(sc, "+inf.0", *nlen = 6));
-	  }
-	if (x < 0.0)
-	  {
-	    sign = true;
-	    x = -x;
-	  }
-	if (x > 1.0e18) /* i.e. close to or greater than most-positive-fixnum (9.22e18), so the code below is unlikely to work, (format #f "~X" 1e19) */
-	  {
-	    int32_t ep = (int32_t)floor(log(x) / log((double)radix));
-	    block_t *b1;
-	    len = 0;
-	    b = number_to_string_with_radix(sc, wrap_real(sc, x / pow((double)radix, (double)ep)), /* divide it down to one digit, then the fractional part */
-					    radix, width, precision, float_choice, &len);
-	    b1 = inline_mallocate(sc, len + 8);
-	    p = (char *)block_data(b1);
-	    p[0] = '\0';
-	    (*nlen) = catstrs(p, len + 8, (sign) ? "-" : "", (char *)block_data(b), (radix == 16) ? "@" : "e", integer_to_string_no_length(sc, ep), (char *)NULL);
-	    liberate(sc, b);
-	    return(b1);
-	  }
-
-	int_part = (s7_int)floor(x);
-	frac_part = x - int_part;
-	nsize = integer_to_string_any_base(n, int_part, radix);
-	min_frac = dpow(radix, -precision);
-
-	/* doesn't this assume precision < 128/256 and that we can fit in 256 digits (1e308)? */
-	for (i = 0, base = radix; (i < precision) && (frac_part > min_frac); i++, base *= radix)
-	  {
-	    s7_int ipart = (s7_int)(frac_part * base);
-	    if (ipart >= radix)         /* rounding confusion */
-	      ipart = radix - 1;
-	    frac_part -= (ipart / base);
-	    /* d[i] = ((const char *)"0123456789abcdef")[ipart]; */
-	    d[i] = dignum[ipart];
-	  }
-	if (i == 0)
-	  d[i++] = '0';
-	d[i] = '\0';
-	b = inline_mallocate(sc, 256);
+        int32_t i;
+        s7_int int_part, nsize;
+        s7_double x = real(obj), frac_part, min_frac, base;
+        bool sign = false;
+        char n[128], d[256];
+
+        if (is_NaN(x))
+          return(string_to_block(sc, "+nan.0", *nlen = 6));
+        if (is_inf(x))
+          {
+            if (x < 0.0)
+              return(string_to_block(sc, "-inf.0", *nlen = 6));
+            return(string_to_block(sc, "+inf.0", *nlen = 6));
+          }
+        if (x < 0.0)
+          {
+            sign = true;
+            x = -x;
+          }
+        if (x > 1.0e18) /* i.e. close to or greater than most-positive-fixnum (9.22e18), so the code below is unlikely to work, (format #f "~X" 1e19) */
+          {
+            int32_t ep = (int32_t)floor(log(x) / log((double)radix));
+            block_t *b1;
+            len = 0;
+            b = number_to_string_with_radix(sc, wrap_real(sc, x / pow((double)radix, (double)ep)), /* divide it down to one digit, then the fractional part */
+                                            radix, width, precision, float_choice, &len);
+            b1 = inline_mallocate(sc, len + 8);
+            p = (char *)block_data(b1);
+            p[0] = '\0';
+            (*nlen) = catstrs(p, len + 8, (sign) ? "-" : "", (char *)block_data(b), (radix == 16) ? "@" : "e", integer_to_string_no_length(sc, ep), (char *)NULL);
+            liberate(sc, b);
+            return(b1);
+          }
+
+        int_part = (s7_int)floor(x);
+        frac_part = x - int_part;
+        nsize = integer_to_string_any_base(n, int_part, radix);
+        min_frac = dpow(radix, -precision);
+
+        /* doesn't this assume precision < 128/256 and that we can fit in 256 digits (1e308)? */
+        for (i = 0, base = radix; (i < precision) && (frac_part > min_frac); i++, base *= radix)
+          {
+            s7_int ipart = (s7_int)(frac_part * base);
+            if (ipart >= radix)         /* rounding confusion */
+              ipart = radix - 1;
+            frac_part -= (ipart / base);
+            /* d[i] = ((const char *)"0123456789abcdef")[ipart]; */
+            d[i] = dignum[ipart];
+          }
+        if (i == 0)
+          d[i++] = '0';
+        d[i] = '\0';
+        b = inline_mallocate(sc, 256);
         p = (char *)block_data(b);
-	/* much faster than catstrs because we know the string lengths */
-	{
-	  char *pt = p;
-	  if (sign) {pt[0] = '-'; pt++;}
-	  memcpy(pt, n, nsize);
-	  pt += nsize;
-	  pt[0] = '.';
-	  pt++;
-	  memcpy(pt, d, i);
-	  pt[i] = '\0';
-	  /* len = ((sign) ? 1 : 0) + 1 + nsize + i; */
-	  len = pt + i - p;
-	}
-	str_len = 256;
+        /* much faster than catstrs because we know the string lengths */
+        {
+          char *pt = p;
+          if (sign) {pt[0] = '-'; pt++;}
+          memcpy(pt, n, nsize);
+          pt += nsize;
+          pt[0] = '.';
+          pt++;
+          memcpy(pt, d, i);
+          pt[i] = '\0';
+          /* len = ((sign) ? 1 : 0) + 1 + nsize + i; */
+          len = pt + i - p;
+        }
+        str_len = 256;
       }
       break;
 
     default:
       {
-	char *pt;
-	s7_int real_len = 0, imag_len = 0;
-	block_t *n = number_to_string_with_radix(sc, wrap_real(sc, real_part(obj)), radix, 0, precision, float_choice, &real_len); /* include floatify */
-	block_t *d = number_to_string_with_radix(sc, wrap_real(sc, imag_part(obj)), radix, 0, precision, float_choice, &imag_len);
-	char *dp = (char *)block_data(d);
-	b = inline_mallocate(sc, 512);
-	p = (char *)block_data(b);
-	pt = p;
-	memcpy(pt, (void *)block_data(n), real_len);
-	pt += real_len;
-	if ((dp[0] != '+') && (dp[0] != '-')) {pt[0] = '+'; pt++;}
-	memcpy(pt, dp, imag_len);
-	pt[imag_len] = 'i';
-	pt[imag_len + 1] = '\0';
-	len = pt + imag_len + 1 - p;
-	str_len = 512;
-	liberate(sc, n);
-	liberate(sc, d);
+        char *pt;
+        s7_int real_len = 0, imag_len = 0;
+        block_t *n = number_to_string_with_radix(sc, wrap_real(sc, real_part(obj)), radix, 0, precision, float_choice, &real_len); /* include floatify */
+        block_t *d = number_to_string_with_radix(sc, wrap_real(sc, imag_part(obj)), radix, 0, precision, float_choice, &imag_len);
+        char *dp = (char *)block_data(d);
+        b = inline_mallocate(sc, 512);
+        p = (char *)block_data(b);
+        pt = p;
+        memcpy(pt, (void *)block_data(n), real_len);
+        pt += real_len;
+        if ((dp[0] != '+') && (dp[0] != '-')) {pt[0] = '+'; pt++;}
+        memcpy(pt, dp, imag_len);
+        pt[imag_len] = 'i';
+        pt[imag_len + 1] = '\0';
+        len = pt + imag_len + 1 - p;
+        str_len = 512;
+        liberate(sc, n);
+        liberate(sc, d);
       }
       break;
     }
@@ -14637,11 +14637,11 @@ static block_t *number_to_string_with_radix(s7_scheme *sc, s7_pointer obj, int32
     {
       s7_int spaces;
       if (width >= str_len)
-	{
-	  str_len = width + 1;
-	  b = reallocate(sc, b, str_len);
-	  p = (char *)block_data(b);
-	}
+        {
+          str_len = width + 1;
+          b = reallocate(sc, b, str_len);
+          p = (char *)block_data(b);
+        }
       spaces = width - len;
       p[width] = '\0';
       memmove((void *)(p + spaces), (void *)p, len);
@@ -14677,17 +14677,17 @@ static s7_pointer g_number_to_string(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer y = cadr(args);
       if (s7_is_integer(y))
-	radix = s7_integer_clamped_if_gmp(sc, y);
+        radix = s7_integer_clamped_if_gmp(sc, y);
       else return(method_or_bust(sc, y, sc->number_to_string_symbol, args, sc->type_names[T_INTEGER], 2));
       if ((radix < 2) || (radix > 16))
-	out_of_range_error_nr(sc, sc->number_to_string_symbol, int_two, y, a_valid_radix_string);
+        out_of_range_error_nr(sc, sc->number_to_string_symbol, int_two, y, a_valid_radix_string);
 #if (WITH_GMP)
       if (!s7_is_bignum(x))
 #endif
-	{
-	  block_t *b = number_to_string_with_radix(sc, x, radix, 0, sc->float_format_precision, 'g', &nlen);
-	  return(block_to_string(sc, b, nlen));
-	}}
+        {
+          block_t *b = number_to_string_with_radix(sc, x, radix, 0, sc->float_format_precision, 'g', &nlen);
+          return(block_to_string(sc, b, nlen));
+        }}
 #if WITH_GMP
   else radix = 10;
   if (s7_is_bignum(x))
@@ -14700,10 +14700,10 @@ static s7_pointer g_number_to_string(s7_scheme *sc, s7_pointer args)
   if (is_t_integer(x))
     {
       if (has_number_name(x))
-	{
-	  nlen = number_name_length(x);
-	  res = (const char *)number_name(x);
-	}
+        {
+          nlen = number_name_length(x);
+          res = (const char *)number_name(x);
+        }
       else res = integer_to_string(sc, integer(x), &nlen);
     }
   else res = number_to_string_base_10(sc, x, 0, sc->float_format_precision, 'g', &nlen, P_WRITE);
@@ -14859,12 +14859,12 @@ static s7_pointer check_sharp_readers(s7_scheme *sc, const char *name)
   for (s7_pointer reader = slot_value(sc->sharp_readers); is_not_null(reader); reader = cdr(reader))
     if (name[0] == s7_character(caar(reader)))
       {
-	if (args == sc->F)
-	  args = set_plist_1(sc, wrap_string(sc, name, safe_strlen(name)));
-	/* args is GC protected by s7_apply_function?? (placed on the stack) */
-	value = s7_apply_function(sc, cdar(reader), args); /* this is much less error-safe than s7_call */
-	if (value != sc->F)
-	  break;
+        if (args == sc->F)
+          args = set_plist_1(sc, wrap_string(sc, name, safe_strlen(name)));
+        /* args is GC protected by s7_apply_function?? (placed on the stack) */
+        value = s7_apply_function(sc, cdar(reader), args); /* this is much less error-safe than s7_call */
+        if (value != sc->F)
+          break;
       }
   if (need_loader_port)
     set_loader_port(current_input_port(sc));
@@ -14880,10 +14880,10 @@ static s7_pointer g_sharp_readers_set(s7_scheme *sc, s7_pointer args)
     error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "can't set *#readers* to ~S", 26), cadr(args)));
   for (x = cadr(args); is_pair(x); x = cdr(x))
     if ((!is_pair(car(x))) ||
-	(!is_character(caar(x))) ||
-	(!is_procedure(cdar(x))))
+        (!is_character(caar(x))) ||
+        (!is_procedure(cdar(x))))
       error_nr(sc, sc->wrong_type_arg_symbol,
-	       set_elist_2(sc, wrap_string(sc, "can't set *#readers* to ~S", 26), cadr(args)));
+               set_elist_2(sc, wrap_string(sc, "can't set *#readers* to ~S", 26), cadr(args)));
   if (!is_null(x))
     error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "can't set *#readers* to ~S", 26), cadr(args)));
   return(cadr(args));
@@ -14913,7 +14913,7 @@ static int32_t inchar(s7_pointer pt)
   else
     {
       if (port_data_size(pt) <= port_position(pt))
-	return(EOF);
+        return(EOF);
       c = (uint8_t)port_data(pt)[port_position(pt)++];
     }
   if (c == '\n')
@@ -14953,47 +14953,47 @@ static s7_pointer unknown_sharp_constant(s7_scheme *sc, const char *name, s7_poi
       s7_pointer result = s7_call(sc, sc->read_error_hook, set_plist_2(sc, sc->T, wrap_string(sc, name, safe_strlen(name))));
       s7_set_history_enabled(sc, old_history_enabled);
       if (result != sc->unspecified)
-	return(result);
+        return(result);
     }
   if (pt) /* #<"..."> which gets here as name="#<" */
     {
       s7_int len = safe_strlen(name);
       if ((name[len - 1] != '>') &&
-	  (is_input_port(pt)) &&
-	  (pt != sc->standard_input))
-	{
-	  if (s7_peek_char(sc, pt) != chars[(uint8_t)'"']) /* if not #<"...">, just return it */
-	    return(make_undefined(sc, name));
-	  /* PERHAPS: strchr port-data '>'?? it might be #<x y> etc -- what would this break? maybe extend section below */
-
-	  if (is_string_port(pt)) /* probably unnecessary (see below) */
-	    {
-	      s7_int c = inchar(pt);
-	      const char *pstart = (const char *)(port_data(pt) + port_position(pt));
-	      const char *p = strchr(pstart, (int)'"');
-	      s7_int added_len;
-	      char *buf;
-	      s7_pointer res;
-
-	      if (!p)
-		{
-		  backchar(c, pt);
-		  return(make_undefined(sc, name));
-		}
-	      p++;
-	      while (char_ok_in_a_name[(uint8_t)(*p)]) {p++;}
-	      added_len = (s7_int)(p - pstart);                 /* p is one past '>' presumably */
-	      /* we can't use strbuf here -- it might be the source of the "name" argument! */
-	      buf = (char *)Malloc(len + added_len + 2);
-	      memcpy((void *)buf, (const void *)name, len);
-	      buf[len] = '"';                                   /* from inchar */
-	      memcpy((void *)(buf + len + 1), (const void *)pstart, added_len);
-	      buf[len + added_len + 1] = 0;
-	      port_position(pt) += added_len;
-	      res = make_undefined(sc, (const char *)buf);
-	      free(buf);
-	      return(res);
-	    }}}
+          (is_input_port(pt)) &&
+          (pt != sc->standard_input))
+        {
+          if (s7_peek_char(sc, pt) != chars[(uint8_t)'"']) /* if not #<"...">, just return it */
+            return(make_undefined(sc, name));
+          /* PERHAPS: strchr port-data '>'?? it might be #<x y> etc -- what would this break? maybe extend section below */
+
+          if (is_string_port(pt)) /* probably unnecessary (see below) */
+            {
+              s7_int c = inchar(pt);
+              const char *pstart = (const char *)(port_data(pt) + port_position(pt));
+              const char *p = strchr(pstart, (int)'"');
+              s7_int added_len;
+              char *buf;
+              s7_pointer res;
+
+              if (!p)
+                {
+                  backchar(c, pt);
+                  return(make_undefined(sc, name));
+                }
+              p++;
+              while (char_ok_in_a_name[(uint8_t)(*p)]) {p++;}
+              added_len = (s7_int)(p - pstart);                 /* p is one past '>' presumably */
+              /* we can't use strbuf here -- it might be the source of the "name" argument! */
+              buf = (char *)Malloc(len + added_len + 2);
+              memcpy((void *)buf, (const void *)name, len);
+              buf[len] = '"';                                   /* from inchar */
+              memcpy((void *)(buf + len + 1), (const void *)pstart, added_len);
+              buf[len + added_len + 1] = 0;
+              port_position(pt) += added_len;
+              res = make_undefined(sc, (const char *)buf);
+              free(buf);
+              return(res);
+            }}}
   return(make_undefined(sc, name));
 }
 
@@ -15024,7 +15024,7 @@ static s7_pointer make_sharp_constant(s7_scheme *sc, const char *name, bool with
        */
       s7_pointer sym = make_symbol_with_strlen(sc, (const char *)(name + 1));
       if ((!is_gensym(sym)) && (is_slot(initial_slot(sym))))
-	return(initial_value(sym));
+        return(initial_value(sym));
       /* here we should not necessarily raise an error that *_... is undefined.  reader-cond, for example, needs to
        *    read undefined #_ vals that it will eventually discard.
        */
@@ -15035,7 +15035,7 @@ static s7_pointer make_sharp_constant(s7_scheme *sc, const char *name, bool with
     {
       s7_pointer x = check_sharp_readers(sc, name);
       if (x != sc->F)
-	return(x);
+        return(x);
     }
 
   if ((name[0] == '\0') || name[1] == '\0')
@@ -15055,62 +15055,62 @@ static s7_pointer make_sharp_constant(s7_scheme *sc, const char *name, bool with
     case 'x':   /* #x (hex) */
     case 'b':   /* #b (binary) */
       {
-	s7_pointer res = make_atom(sc, (char *)(name + 1), (name[0] == 'o') ? 8 : ((name[0] == 'x') ? 16 : 2), NO_SYMBOLS, with_error);
-	if ((error_if_bad_number) && (res == sc->F)) /* #b32 etc but not if called from string->number */
-	  error_nr(sc, sc->read_error_symbol, set_elist_2(sc, wrap_string(sc, "#~A is not a number", 19), wrap_string(sc, name, safe_strlen(name))));
-	return(res);
+        s7_pointer res = make_atom(sc, (char *)(name + 1), (name[0] == 'o') ? 8 : ((name[0] == 'x') ? 16 : 2), NO_SYMBOLS, with_error);
+        if ((error_if_bad_number) && (res == sc->F)) /* #b32 etc but not if called from string->number */
+          error_nr(sc, sc->read_error_symbol, set_elist_2(sc, wrap_string(sc, "#~A is not a number", 19), wrap_string(sc, name, safe_strlen(name))));
+        return(res);
       }
 
       /* -------- #\... -------- */
     case '\\':
       if (name[2] == 0)                             /* the most common case: #\a */
-	return(chars[(uint8_t)(name[1])]);
+        return(chars[(uint8_t)(name[1])]);
       /* not uint32_t here!  (uint32_t)255 (as a char) returns -1!! */
       switch (name[1])
-	{
-	case 'n':
-	  if ((c_strings_are_equal(name + 1, "null")) ||
-	      (c_strings_are_equal(name + 1, "nul")))
-	    return(chars[0]);
-
-	  if (c_strings_are_equal(name + 1, "newline"))
-	    return(chars[(uint8_t)'\n']);
-	  break;
-
-	case 's': if (c_strings_are_equal(name + 1, "space"))     return(chars[(uint8_t)' ']);  break;
-	case 'r': if (c_strings_are_equal(name + 1, "return"))    return(chars[(uint8_t)'\r']); break;
-	case 'l': if (c_strings_are_equal(name + 1, "linefeed"))  return(chars[(uint8_t)'\n']); break;
-	case 't': if (c_strings_are_equal(name + 1, "tab"))       return(chars[(uint8_t)'\t']); break;
-	case 'a': if (c_strings_are_equal(name + 1, "alarm"))     return(chars[7]);             break;
-	case 'b': if (c_strings_are_equal(name + 1, "backspace")) return(chars[8]);             break;
-	case 'e': if (c_strings_are_equal(name + 1, "escape"))    return(chars[0x1b]);          break;
-	case 'd': if (c_strings_are_equal(name + 1, "delete"))    return(chars[0x7f]);          break;
-
-	case 'x':
-	  /* #\x is just x, but apparently #\x<num> is int->char? #\x65 -> #\e, and #\xcebb is lambda? */
-	  {
-	    /* sscanf here misses errors like #\x1.4, but make_atom misses #\x6/3,
-	     *   #\x#b0, #\x#e0.0, #\x-0, #\x#e0e100 etc, so we have to do it at an even lower level.
-	     * another problem: #\xbdca2cbec overflows so lval is -593310740 -> segfault unless caught
-	     */
-	    bool happy = true;
-	    const char *tmp = (const char *)(name + 2);
-	    int32_t lval = 0;
-
-	    while ((*tmp) && (happy) && (lval >= 0) && (lval < 256))
-	      {
-		int32_t dig = digits[(int32_t)(*tmp++)];
-		if (dig < 16)
-		  lval = dig + (lval * 16);
-		else happy = false;
-	      }
-	    if ((happy) &&
-		(lval < 256) &&
-		(lval >= 0))
-	      return(chars[lval]);
-	  }
-	  break;
-	}}
+        {
+        case 'n':
+          if ((c_strings_are_equal(name + 1, "null")) ||
+              (c_strings_are_equal(name + 1, "nul")))
+            return(chars[0]);
+
+          if (c_strings_are_equal(name + 1, "newline"))
+            return(chars[(uint8_t)'\n']);
+          break;
+
+        case 's': if (c_strings_are_equal(name + 1, "space"))     return(chars[(uint8_t)' ']);  break;
+        case 'r': if (c_strings_are_equal(name + 1, "return"))    return(chars[(uint8_t)'\r']); break;
+        case 'l': if (c_strings_are_equal(name + 1, "linefeed"))  return(chars[(uint8_t)'\n']); break;
+        case 't': if (c_strings_are_equal(name + 1, "tab"))       return(chars[(uint8_t)'\t']); break;
+        case 'a': if (c_strings_are_equal(name + 1, "alarm"))     return(chars[7]);             break;
+        case 'b': if (c_strings_are_equal(name + 1, "backspace")) return(chars[8]);             break;
+        case 'e': if (c_strings_are_equal(name + 1, "escape"))    return(chars[0x1b]);          break;
+        case 'd': if (c_strings_are_equal(name + 1, "delete"))    return(chars[0x7f]);          break;
+
+        case 'x':
+          /* #\x is just x, but apparently #\x<num> is int->char? #\x65 -> #\e, and #\xcebb is lambda? */
+          {
+            /* sscanf here misses errors like #\x1.4, but make_atom misses #\x6/3,
+             *   #\x#b0, #\x#e0.0, #\x-0, #\x#e0e100 etc, so we have to do it at an even lower level.
+             * another problem: #\xbdca2cbec overflows so lval is -593310740 -> segfault unless caught
+             */
+            bool happy = true;
+            const char *tmp = (const char *)(name + 2);
+            int32_t lval = 0;
+
+            while ((*tmp) && (happy) && (lval >= 0) && (lval < 256))
+              {
+                int32_t dig = digits[(int32_t)(*tmp++)];
+                if (dig < 16)
+                  lval = dig + (lval * 16);
+                else happy = false;
+              }
+            if ((happy) &&
+                (lval < 256) &&
+                (lval >= 0))
+              return(chars[lval]);
+          }
+          break;
+        }}
   return(unknown_sharp_constant(sc, name, NULL));
 }
 
@@ -15128,8 +15128,8 @@ static s7_int string_to_integer(const char *str, int32_t radix, bool *overflow)
   else
     if (str[0] == '-')
       {
-	negative = true;
-	tmp++;
+        negative = true;
+        tmp++;
       }
   while (*tmp == '0') {tmp++;};
 #if WITH_GMP
@@ -15138,72 +15138,72 @@ static s7_int string_to_integer(const char *str, int32_t radix, bool *overflow)
  if (radix == 10)
     {
       while (true)
-	{
-	  dig = digits[(uint8_t)(*tmp++)];
-	  if (dig > 9) break;
+        {
+          dig = digits[(uint8_t)(*tmp++)];
+          if (dig > 9) break;
 #if HAVE_OVERFLOW_CHECKS
-	  if ((multiply_overflow(lval, (s7_int)10, &lval)) ||
-	      (add_overflow(lval, (s7_int)dig, &lval)))
-	    {
-	      if ((radix == 10) &&
-		  (strncmp(str, "-9223372036854775808", 20) == 0) &&
-		  (digits[(uint8_t)(*tmp++)] > 9)) /* i.e. next thing is not a digit -- "/" for example */
-		return(S7_INT64_MIN);
-	      *overflow = true;
-	      return((negative) ? S7_INT64_MIN : S7_INT64_MAX);
-	    }
+          if ((multiply_overflow(lval, (s7_int)10, &lval)) ||
+              (add_overflow(lval, (s7_int)dig, &lval)))
+            {
+              if ((radix == 10) &&
+                  (strncmp(str, "-9223372036854775808", 20) == 0) &&
+                  (digits[(uint8_t)(*tmp++)] > 9)) /* i.e. next thing is not a digit -- "/" for example */
+                return(S7_INT64_MIN);
+              *overflow = true;
+              return((negative) ? S7_INT64_MIN : S7_INT64_MAX);
+            }
 #else
-	  lval = dig + (lval * 10);
-	  dig = digits[(uint8_t)(*tmp++)];
-	  if (dig > 9) break;
-	  lval = dig + (lval * 10);
+          lval = dig + (lval * 10);
+          dig = digits[(uint8_t)(*tmp++)];
+          if (dig > 9) break;
+          lval = dig + (lval * 10);
 #endif
-	}}
+        }}
   else
     while (true)
       {
-	dig = digits[(uint8_t)(*tmp++)];
-	if (dig >= radix) break;
+        dig = digits[(uint8_t)(*tmp++)];
+        if (dig >= radix) break;
 #if HAVE_OVERFLOW_CHECKS && (!WITH_GMP)
-	{
-	  s7_int oval = 0;
-	  if (multiply_overflow(lval, (s7_int)radix, &oval))
-	    {
-	      /* maybe a bad idea!  #xffffffffffffffff -> -1??? this is needed for 64-bit number hacks (see s7test.scm bit-reverse) */
-	      if ((radix == 16) &&
-		  (digits[(uint8_t)(*tmp)] >= radix))
-		{
-		  lval -= 576460752303423488LL; /* turn off sign bit */
-		  lval *= radix;
-		  lval += dig;
-		  lval -= 9223372036854775807LL;
-		  return(lval - 1);
-		}
-	      lval = oval; /* old case */
-	      if ((lval == S7_INT64_MIN)  && (digits[(uint8_t)(*tmp++)] > 9))
-		return(lval);
-	      *overflow = true;
-	      break;
-	    }
-	  else lval = oval;
-	  if (add_overflow(lval, (s7_int)dig, &lval))
-	    {
-	      if (lval == S7_INT64_MIN) return(lval);
-	      *overflow = true;
-	      break;
-	    }}
+        {
+          s7_int oval = 0;
+          if (multiply_overflow(lval, (s7_int)radix, &oval))
+            {
+              /* maybe a bad idea!  #xffffffffffffffff -> -1??? this is needed for 64-bit number hacks (see s7test.scm bit-reverse) */
+              if ((radix == 16) &&
+                  (digits[(uint8_t)(*tmp)] >= radix))
+                {
+                  lval -= 576460752303423488LL; /* turn off sign bit */
+                  lval *= radix;
+                  lval += dig;
+                  lval -= 9223372036854775807LL;
+                  return(lval - 1);
+                }
+              lval = oval; /* old case */
+              if ((lval == S7_INT64_MIN)  && (digits[(uint8_t)(*tmp++)] > 9))
+                return(lval);
+              *overflow = true;
+              break;
+            }
+          else lval = oval;
+          if (add_overflow(lval, (s7_int)dig, &lval))
+            {
+              if (lval == S7_INT64_MIN) return(lval);
+              *overflow = true;
+              break;
+            }}
 #else
-	lval = dig + (lval * radix);
-	dig = digits[(uint8_t)(*tmp++)];
-	if (dig >= radix) break;
-	lval = dig + (lval * radix);
+        lval = dig + (lval * radix);
+        dig = digits[(uint8_t)(*tmp++)];
+        if (dig >= radix) break;
+        lval = dig + (lval * radix);
 #endif
       }
 
 #if WITH_GMP
  if (!(*overflow))
    (*overflow) = ((lval > S7_INT32_MAX) ||
-		  ((tmp - tmp1) > s7_int_digits_by_radix[radix]));
+                  ((tmp - tmp1) > s7_int_digits_by_radix[radix]));
   /* this tells the string->number readers to create a bignum.  We need to be very conservative here to catch contexts such as (/ 1/524288 19073486328125) */
 #endif
   return((negative) ? -lval : lval);
@@ -15266,32 +15266,32 @@ static s7_double string_to_double_with_radix_1(const char *ur_str, int32_t radix
       bool exp_negative = false;
       str++;
       if (*str == '+')
-	str++;
+        str++;
       else
-	if (*str == '-')
-	  {
-	    str++;
-	    exp_negative = true;
-	  }
+        if (*str == '-')
+          {
+            str++;
+            exp_negative = true;
+          }
       while ((dig = digits[(int32_t)(*str++)]) < 10) /* exponent itself is always base 10 */
-	{
+        {
 #if HAVE_OVERFLOW_CHECKS
-	  if ((int32_multiply_overflow(exponent, 10, &exponent)) ||
-	      (int32_add_overflow(exponent, dig, &exponent)))
-	    {
-	      exponent = 1000000; /* see below */
-	      break;
-	    }
+          if ((int32_multiply_overflow(exponent, 10, &exponent)) ||
+              (int32_add_overflow(exponent, dig, &exponent)))
+            {
+              exponent = 1000000; /* see below */
+              break;
+            }
 #else
-	  exponent = dig + (exponent * 10);
+          exponent = dig + (exponent * 10);
 #endif
-	}
+        }
 #if (!defined(__GNUC__)) || ((__GNUC__ < 5) && (!defined(__clang__)))
       if (exponent < 0)         /* we overflowed, so make sure we notice it below (need to check for 0.0e... first) (Brian Damgaard) */
-	exponent = 1000000;     /*   see below for examples -- this number needs to be very big but not too big for add */
+        exponent = 1000000;     /*   see below for examples -- this number needs to be very big but not too big for add */
 #endif
       if (exp_negative)
-	exponent = -exponent;
+        exponent = -exponent;
 
       /*           2e12341234123123123123213123123123 -> 0.0
        * but exp len is not the decider: 2e00000000000000000000000000000000000000001 -> 20.0
@@ -15333,69 +15333,69 @@ static s7_double string_to_double_with_radix_1(const char *ur_str, int32_t radix
        */
 
       for (i = 0; i < max_len; i++)
-	{
-	  dig = digits[(int32_t)(*str++)];
-	  if (dig < radix)
-	    int_part = dig + (int_part * radix);
-	  else break;
-	}
+        {
+          dig = digits[(int32_t)(*str++)];
+          if (dig < radix)
+            int_part = dig + (int_part * radix);
+          else break;
+        }
 
       /* if the exponent is huge, check for 0 int_part and frac_part before complaining (0e1000 or 0.0e1000)
        */
       if ((int_part == 0) &&
-	  (exponent > max_len))
-	{
-	  /* if frac_part is also 0, return 0.0 */
-	  if (frac_len == 0) return(0.0);
-	  str = fpart;
-	  while ((dig = digits[(int32_t)(*str++)]) < radix)
-	    frac_part = dig + (frac_part * radix);
-	  if (frac_part == 0) return(0.0);
+          (exponent > max_len))
+        {
+          /* if frac_part is also 0, return 0.0 */
+          if (frac_len == 0) return(0.0);
+          str = fpart;
+          while ((dig = digits[(int32_t)(*str++)]) < radix)
+            frac_part = dig + (frac_part * radix);
+          if (frac_part == 0) return(0.0);
 #if WITH_GMP
-	  (*overflow) = true;
+          (*overflow) = true;
 #endif
-	}
+        }
 #if WITH_GMP
       (*overflow) = ((int_part > 0) || (exponent > 20));    /* .1e310 is a tricky case */
 #endif
       if (int_part != 0) /* 0.<310 zeros here>1e310 for example -- pow (via dpow) thinks it has to be too big, returns Nan,
-			  *   then Nan * 0 -> Nan and the NaN propagates
-			  */
-	{
-	  if (int_len <= max_len)
-	    dval = int_part * dpow(radix, exponent);
-	  else dval = int_part * dpow(radix, exponent + int_len - max_len);
-	}
+                          *   then Nan * 0 -> Nan and the NaN propagates
+                          */
+        {
+          if (int_len <= max_len)
+            dval = int_part * dpow(radix, exponent);
+          else dval = int_part * dpow(radix, exponent + int_len - max_len);
+        }
       else dval = 0.0;
 
       /* shift by exponent, but if int_len > max_len then we assumed (see below) int_len - max_len 0's on the left */
       /*   using int_to_int or table lookups here instead of pow did not make any difference in speed */
 
       if (int_len < max_len)
-	{
-	  str = fpart;
-	  for (int32_t k = 0; (frac_len > 0) && (k < exponent); k += max_len)
-	    {
-	      int32_t flen = (frac_len > max_len) ? max_len : frac_len; /* ? */
-	      frac_len -= max_len;
-	      frac_part = 0;
-	      for (i = 0; i < flen; i++)
-		frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
-	      if (frac_part != 0)                                /* same pow->NaN problem as above can occur here */
-		dval += frac_part * dpow(radix, exponent - flen - k);
-	    }}
+        {
+          str = fpart;
+          for (int32_t k = 0; (frac_len > 0) && (k < exponent); k += max_len)
+            {
+              int32_t flen = (frac_len > max_len) ? max_len : frac_len; /* ? */
+              frac_len -= max_len;
+              frac_part = 0;
+              for (i = 0; i < flen; i++)
+                frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
+              if (frac_part != 0)                                /* same pow->NaN problem as above can occur here */
+                dval += frac_part * dpow(radix, exponent - flen - k);
+            }}
       else
-	/* some of the fraction is in the integer part before the negative exponent shifts it over */
-	if (int_len > max_len)
-	  {
-	    int32_t ilen = int_len - max_len;                          /* we read these above */
-	    /* str should be at the last digit we read */
-	    if (ilen > max_len)
-	      ilen = max_len;
-	    for (i = 0; i < ilen; i++)
-	      frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
-	    dval += frac_part * dpow(radix, exponent - ilen);
-	  }
+        /* some of the fraction is in the integer part before the negative exponent shifts it over */
+        if (int_len > max_len)
+          {
+            int32_t ilen = int_len - max_len;                          /* we read these above */
+            /* str should be at the last digit we read */
+            if (ilen > max_len)
+              ilen = max_len;
+            for (i = 0; i < ilen; i++)
+              frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
+            dval += frac_part * dpow(radix, exponent - ilen);
+          }
       return(sign * dval);
     }
 
@@ -15412,12 +15412,12 @@ static s7_double string_to_double_with_radix_1(const char *ur_str, int32_t radix
        * this always combines the same integer and the same exponent no matter how the number is expressed.
        */
       if (int_len > 0)
-	{
-	  const char *iend = (const char *)(str + int_len - 1);
-	  while ((*iend == '0') && (iend != str)) {iend--; int_exponent++;}
-	  while (str <= iend)
-	    int_part = digits[(int32_t)(*str++)] + (int_part * radix);
-	}
+        {
+          const char *iend = (const char *)(str + int_len - 1);
+          while ((*iend == '0') && (iend != str)) {iend--; int_exponent++;}
+          while (str <= iend)
+            int_part = digits[(int32_t)(*str++)] + (int_part * radix);
+        }
       dval = (int_exponent == 0) ? (s7_double)int_part : int_part * dpow(radix, int_exponent);
     }
   else
@@ -15431,14 +15431,14 @@ static s7_double string_to_double_with_radix_1(const char *ur_str, int32_t radix
        * 98765432101234567890987654321.0e-28    9.8765432101235
        */
       for (i = 0; i < len; i++)
-	int_part = digits[(int32_t)(*str++)] + (int_part * radix);
+        int_part = digits[(int32_t)(*str++)] + (int_part * radix);
       flen = -exponent;
       if (flen > max_len)
-	flen = max_len;
+        flen = max_len;
       for (i = 0; i < flen; i++)
-	frpart = digits[(int32_t)(*str++)] + (frpart * radix);
+        frpart = digits[(int32_t)(*str++)] + (frpart * radix);
       if (len <= 0)
-	dval = int_part + frpart * dpow(radix, len - flen);
+        dval = int_part + frpart * dpow(radix, len - flen);
       else dval = int_part + frpart * dpow(radix, -flen);
     }
 
@@ -15446,63 +15446,63 @@ static s7_double string_to_double_with_radix_1(const char *ur_str, int32_t radix
     {
       str = fpart;
       if (frac_len <= max_len)
-	{
-	  /* splitting out base 10 case saves very little here */
-	  /* this ignores trailing zeros, so that 0.3 equals 0.300 */
-	  const char *fend = (const char *)(str + frac_len - 1);
-
-	  while ((*fend == '0') && (fend != str)) {fend--; frac_len--;} /* (= .6 0.6000) */
-	  if ((frac_len & 1) == 0)
-	    {
-	      while (str <= fend)
-		{
-		  frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
-		  frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
-		}}
-	  else
-	    while (str <= fend)
-	      frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
-
-	  dval += frac_part * dpow(radix, exponent - frac_len);
-
-	  /* 0.6:    frac:    6, exp: 0.10000000000000000555, val: 0.60000000000000008882
-	   * 0.60:   frac:   60, exp: 0.01000000000000000021, val: 0.59999999999999997780
-	   * 0.6000: frac: 6000, exp: 0.00010000000000000000, val: 0.59999999999999997780
-	   * (= 0.6 0.60): #f
-	   * (= #i3/5 0.6): #f
-	   * so (string->number (number->string num)) == num only if both num's are the same text (or you get lucky)
-	   * (= 0.6 6e-1): #t ; but not 60e-2
-	   * to fix the 0.60 case, we need to ignore trailing post-dot zeros.
-	   */
-	}
+        {
+          /* splitting out base 10 case saves very little here */
+          /* this ignores trailing zeros, so that 0.3 equals 0.300 */
+          const char *fend = (const char *)(str + frac_len - 1);
+
+          while ((*fend == '0') && (fend != str)) {fend--; frac_len--;} /* (= .6 0.6000) */
+          if ((frac_len & 1) == 0)
+            {
+              while (str <= fend)
+                {
+                  frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
+                  frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
+                }}
+          else
+            while (str <= fend)
+              frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
+
+          dval += frac_part * dpow(radix, exponent - frac_len);
+
+          /* 0.6:    frac:    6, exp: 0.10000000000000000555, val: 0.60000000000000008882
+           * 0.60:   frac:   60, exp: 0.01000000000000000021, val: 0.59999999999999997780
+           * 0.6000: frac: 6000, exp: 0.00010000000000000000, val: 0.59999999999999997780
+           * (= 0.6 0.60): #f
+           * (= #i3/5 0.6): #f
+           * so (string->number (number->string num)) == num only if both num's are the same text (or you get lucky)
+           * (= 0.6 6e-1): #t ; but not 60e-2
+           * to fix the 0.60 case, we need to ignore trailing post-dot zeros.
+           */
+        }
       else
-	{
-	  if (exponent <= 0)
-	    {
-	      for (i = 0; i < max_len; i++)
-		frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
-
-	      dval += frac_part * dpow(radix, exponent - max_len);
-	    }
-	  else
-	    {
-	      /* 1.0123456789876543210e1         10.12345678987654373771
-	       * 1.0123456789876543210e10        10123456789.87654304504394531250
-	       * 0.000000010000000000000000e10   100.0
-	       * 0.000000010000000000000000000000000000000000000e10 100.0
-	       * 0.000000012222222222222222222222222222222222222e10 122.22222222222222
-	       * 0.000000012222222222222222222222222222222222222e17 1222222222.222222
-	       */
-	      int_part = 0;
-	      for (i = 0; i < exponent; i++)
-		int_part = digits[(int32_t)(*str++)] + (int_part * radix);
-	      frac_len -= exponent;
-	      if (frac_len > max_len)
-		frac_len = max_len;
-	      for (i = 0; i < frac_len; i++)
-		frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
-	      dval += int_part + frac_part * dpow(radix, -frac_len);
-	    }}}
+        {
+          if (exponent <= 0)
+            {
+              for (i = 0; i < max_len; i++)
+                frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
+
+              dval += frac_part * dpow(radix, exponent - max_len);
+            }
+          else
+            {
+              /* 1.0123456789876543210e1         10.12345678987654373771
+               * 1.0123456789876543210e10        10123456789.87654304504394531250
+               * 0.000000010000000000000000e10   100.0
+               * 0.000000010000000000000000000000000000000000000e10 100.0
+               * 0.000000012222222222222222222222222222222222222e10 122.22222222222222
+               * 0.000000012222222222222222222222222222222222222e17 1222222222.222222
+               */
+              int_part = 0;
+              for (i = 0; i < exponent; i++)
+                int_part = digits[(int32_t)(*str++)] + (int_part * radix);
+              frac_len -= exponent;
+              if (frac_len > max_len)
+                frac_len = max_len;
+              for (i = 0; i < frac_len; i++)
+                frac_part = digits[(int32_t)(*str++)] + (frac_part * radix);
+              dval += int_part + frac_part * dpow(radix, -frac_len);
+            }}}
 #if WITH_GMP
   if ((int_part == 0) &&
       (frac_part == 0))
@@ -15532,15 +15532,15 @@ static s7_pointer nan1_or_bust(s7_scheme *sc, s7_double x, const char *p, const
   if (p[len - 1] == 'i')       /* +nan.0[+/-]...i */
     {
       if (len == (offset + 2))            /* +nan.0+i */
-	return(make_complex_not_0i(sc, x, (p[offset] == '+') ? 1.0 : -1.0));
+        return(make_complex_not_0i(sc, x, (p[offset] == '+') ? 1.0 : -1.0));
       if ((len > (offset + 1)) && (len < 1024)) /* make compiler happy */
-	{
-	  char *ip = copy_string_with_length((const char *)(p + offset), len - offset - 1);
-	  s7_pointer imag = make_atom(sc, ip, radix, NO_SYMBOLS, WITHOUT_OVERFLOW_ERROR);
-	  free(ip);
-	  if (is_real(imag))
-	    return(make_complex(sc, x, real_to_double(sc, imag, __func__))); /* +nan.0+2/3i etc */
-	}}
+        {
+          char *ip = copy_string_with_length((const char *)(p + offset), len - offset - 1);
+          s7_pointer imag = make_atom(sc, ip, radix, NO_SYMBOLS, WITHOUT_OVERFLOW_ERROR);
+          free(ip);
+          if (is_real(imag))
+            return(make_complex(sc, x, real_to_double(sc, imag, __func__))); /* +nan.0+2/3i etc */
+        }}
   return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
 }
 
@@ -15553,7 +15553,7 @@ static s7_pointer nan2_or_bust(s7_scheme *sc, s7_double x, const char *q, int32_
       s7_pointer rl = make_atom(sc, ip, radix, NO_SYMBOLS, WITHOUT_OVERFLOW_ERROR);
       free(ip);
       if (is_real(rl))
-	return(make_complex(sc, real_to_double(sc, rl, __func__), x));
+        return(make_complex(sc, real_to_double(sc, rl, __func__), x));
     }
   return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
 }
@@ -15580,19 +15580,19 @@ static s7_pointer make_symbol_or_number(s7_scheme *sc, const char *name, int32_t
   for (i = 0, j = 0; i < len; i++)
     if (name[i] != sep)
       {
-	if ((digits[(uint8_t)(name[i])] < radix) || (!t_number_separator_p[(uint8_t)name[i]]))
-	  new_name[j++] = name[i];
-	else
-	  {
-	    liberate(sc, b);
-	    return((want_symbol) ? make_symbol_with_strlen(sc, name) : sc->F);
-	  }}
+        if ((digits[(uint8_t)(name[i])] < radix) || (!t_number_separator_p[(uint8_t)name[i]]))
+          new_name[j++] = name[i];
+        else
+          {
+            liberate(sc, b);
+            return((want_symbol) ? make_symbol_with_strlen(sc, name) : sc->F);
+          }}
     else  /* sep has to be between two digits */
       if ((digits[(uint8_t)(name[i - 1])] >= radix) || (digits[(uint8_t)(name[i + 1])] >= radix))
-	{
-	  liberate(sc, b);
-	  return((want_symbol) ? make_symbol_with_strlen(sc, name) : sc->F);
-	}
+        {
+          liberate(sc, b);
+          return((want_symbol) ? make_symbol_with_strlen(sc, name) : sc->F);
+        }
 
   new_name[j] = '\0';
   res = string_to_number(sc, new_name, radix);
@@ -15623,55 +15623,55 @@ static s7_pointer make_atom(s7_scheme *sc, char *q, int32_t radix, bool want_sym
     case '-':
       c = *p++;
       if (c == '.')
-	{
-	  has_dec_point1 = true;
-	  c = *p++;
-	}
+        {
+          has_dec_point1 = true;
+          c = *p++;
+        }
       if (!c)
-	return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+        return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
       if (!is_digit(c, radix))
-	{
-	  if (has_dec_point1)
-	    return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-	  if (c == 'n')
-	    {
-	      if (local_strcmp(p, "an.0"))            /* +nan.0, even if we read -nan.0 -- what's the point of a negative NaN? */
-		return(real_NaN);
-	      if ((local_strncmp(p, "an.0", 4)) &&    /* +nan.0[+/-]...i */
-		  ((p[4] == '+') || (p[4] == '-')))
-		return(nan1_or_bust(sc, NAN, p, q, radix, want_symbol, 4));
-	      /* read +/-nan.<int> or +/-nan.<int>+/-...i */
-	      if (local_strncmp(p, "an.", 3))         /* +nan.<int> */
-		{
-		  bool overflow = false;
-		  int32_t i;
-		  for (i = 3; is_digit(p[i], 10); i++);
-		  if ((p[i] == '+') || (p[i] == '-')) /* complex case */
-		    {
-		      int64_t payload = string_to_integer((char *)(p + 3), 10, &overflow);
-		      return(nan1_or_bust(sc, nan_with_payload(payload), p, q, radix, want_symbol, i));
-		    }
-		  if ((p[i] != '\0') && (!white_space[(uint8_t)(p[i])])) /* check for +nan.0i etc, '\0' is not white_space apparently */
-		    return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-		  return(make_nan_with_payload(sc, string_to_integer((char *)(p + 3), 10, &overflow)));
-		}}
-	  if (c == 'i')
-	    {
-	      if (local_strcmp(p, "nf.0"))  /* +inf.0 */
-		return((q[0] == '+') ? real_infinity : real_minus_infinity);
-	      if ((local_strncmp(p, "nf.0", 4)) &&
-		  ((p[4] == '+') || (p[4] == '-')))
-		return(nan1_or_bust(sc, (q[0] == '-') ? -INFINITY : INFINITY, p, q, radix, want_symbol, 4));
-	    }
-	  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-	}
+        {
+          if (has_dec_point1)
+            return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+          if (c == 'n')
+            {
+              if (local_strcmp(p, "an.0"))            /* +nan.0, even if we read -nan.0 -- what's the point of a negative NaN? */
+                return(real_NaN);
+              if ((local_strncmp(p, "an.0", 4)) &&    /* +nan.0[+/-]...i */
+                  ((p[4] == '+') || (p[4] == '-')))
+                return(nan1_or_bust(sc, NAN, p, q, radix, want_symbol, 4));
+              /* read +/-nan.<int> or +/-nan.<int>+/-...i */
+              if (local_strncmp(p, "an.", 3))         /* +nan.<int> */
+                {
+                  bool overflow = false;
+                  int32_t i;
+                  for (i = 3; is_digit(p[i], 10); i++);
+                  if ((p[i] == '+') || (p[i] == '-')) /* complex case */
+                    {
+                      int64_t payload = string_to_integer((char *)(p + 3), 10, &overflow);
+                      return(nan1_or_bust(sc, nan_with_payload(payload), p, q, radix, want_symbol, i));
+                    }
+                  if ((p[i] != '\0') && (!white_space[(uint8_t)(p[i])])) /* check for +nan.0i etc, '\0' is not white_space apparently */
+                    return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+                  return(make_nan_with_payload(sc, string_to_integer((char *)(p + 3), 10, &overflow)));
+                }}
+          if (c == 'i')
+            {
+              if (local_strcmp(p, "nf.0"))  /* +inf.0 */
+                return((q[0] == '+') ? real_infinity : real_minus_infinity);
+              if ((local_strncmp(p, "nf.0", 4)) &&
+                  ((p[4] == '+') || (p[4] == '-')))
+                return(nan1_or_bust(sc, (q[0] == '-') ? -INFINITY : INFINITY, p, q, radix, want_symbol, 4));
+            }
+          return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+        }
       break;
 
     case '.':
       has_dec_point1 = true;
       c = *p++;
       if ((!c) || (!is_digit(c, radix)))
-	return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+        return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
       break;
 
     case 'n':
@@ -15686,7 +15686,7 @@ static s7_pointer make_atom(s7_scheme *sc, char *q, int32_t radix, bool want_sym
 
     default:
       if (!is_digit(c, radix))
-	return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+        return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
       break;
     }
 
@@ -15702,145 +15702,145 @@ static s7_pointer make_atom(s7_scheme *sc, char *q, int32_t radix, bool want_sym
 
     for ( ; (c = *p) != 0; ++p)
       {
-	/* what about embedded null? (string->number (string #\1 (integer->char 0) #\0))
-	 *   currently we stop and return 1, but Guile returns #f.
-	 *   this also means we can't use substring_uncopied if (string->number (substring...))
-	 */
-	if (!is_digit(c, current_radix))         /* moving this inside the switch statement was much slower */
-	  {
-	    current_radix = radix;
-
-	    switch (c)
-	      {
-		/* -------- decimal point -------- */
-	      case '.':
-		if ((!is_digit(p[1], current_radix)) &&
-		    (!is_digit(p[-1], current_radix)))
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		if (has_plus_or_minus == 0)
-		  {
-		    if ((has_dec_point1) || (slash1))
-		      return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-		    has_dec_point1 = true;
-		  }
-		else
-		  {
-		    if ((has_dec_point2) || (slash2))
-		      return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-		    has_dec_point2 = true;
-		  }
-		continue;
-
-		/* -------- exponent marker -------- */
+        /* what about embedded null? (string->number (string #\1 (integer->char 0) #\0))
+         *   currently we stop and return 1, but Guile returns #f.
+         *   this also means we can't use substring_uncopied if (string->number (substring...))
+         */
+        if (!is_digit(c, current_radix))         /* moving this inside the switch statement was much slower */
+          {
+            current_radix = radix;
+
+            switch (c)
+              {
+                /* -------- decimal point -------- */
+              case '.':
+                if ((!is_digit(p[1], current_radix)) &&
+                    (!is_digit(p[-1], current_radix)))
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                if (has_plus_or_minus == 0)
+                  {
+                    if ((has_dec_point1) || (slash1))
+                      return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+                    has_dec_point1 = true;
+                  }
+                else
+                  {
+                    if ((has_dec_point2) || (slash2))
+                      return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+                    has_dec_point2 = true;
+                  }
+                continue;
+
+                /* -------- exponent marker -------- */
 #if WITH_EXTRA_EXPONENT_MARKERS
-		/* 1st 3d-perspective 0.0f 128.0f 3d 1s -- in 2 million lines of public scheme code, not one actual use! */
-	      case 's': case 'S':
-	      case 'd': case 'D':
-	      case 'f': case 'F':
-	      case 'l': case 'L':
-#endif
-	      case 'e': case 'E':
-		if (current_radix > 10) /* see above */
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-		/* fall through -- if '@' used, radices>10 are ok */
-
-	      case '@':
-		current_radix = 10;
-
-		if (((ex1) ||
-		     (slash1)) &&
-		    (has_plus_or_minus == 0)) /* ee */
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		if (((ex2) ||
-		     (slash2)) &&
-		    (has_plus_or_minus != 0)) /* 1+1.0ee */
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		if ((!is_digit(p[-1], radix)) && /* was current_radix but that's always 10! */
-		    (p[-1] != '.'))
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		if (has_plus_or_minus == 0)
-		  {
-		    ex1 = p;
-		    has_dec_point1 = true; /* decimal point illegal from now on */
-		  }
-		else
-		  {
-		    ex2 = p;
-		    has_dec_point2 = true;
-		  }
-		p++;
-		if ((*p == '-') || (*p == '+')) p++;
-		if (is_digit(*p, current_radix))
-		  continue;
-		break;
-
-		/* -------- internal + or - -------- */
-	      case '+':
-	      case '-':
-		if (has_plus_or_minus != 0) /* already have the separator */
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		has_plus_or_minus = (c == '+') ? 1 : -1;
-		plus = (char *)(p + 1);
-		/* now check for nan/inf as imaginary part */
-
-		if ((plus[0] == 'n') &&
-		    (local_strncmp(plus, "nan.", 4)))
-		  {
-		    bool overflow1 = false;
-		    int64_t payload = string_to_integer((char *)(p + 5), 10, &overflow1);
-		    return(nan2_or_bust(sc, nan_with_payload(payload), q, radix, want_symbol, (intptr_t)(p - q)));
-		  }
-		if ((plus[0] == 'i') &&
-		    (local_strcmp(plus, "inf.0i")))
-		  return(nan2_or_bust(sc, (c == '+') ? INFINITY : -INFINITY, q, radix, want_symbol, (intptr_t)(p - q)));
-		continue;
-
-		/* ratio marker */
-	      case '/':
-		if ((has_plus_or_minus == 0) &&
-		    ((ex1) ||
-		     (slash1) ||
-		     (has_dec_point1)))
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		if ((has_plus_or_minus != 0) &&
-		    ((ex2) ||
-		     (slash2) ||
-		     (has_dec_point2)))
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		if (has_plus_or_minus == 0)
-		  slash1 = (char *)(p + 1);
-		else slash2 = (char *)(p + 1);
-
-		if ((!is_digit(p[1], current_radix)) ||
-		    (!is_digit(p[-1], current_radix)))
-		  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-
-		continue;
-
-		/* -------- i for the imaginary part -------- */
-	      case 'i':
-		if ((has_plus_or_minus != 0) &&
-		    (!has_i))
-		  {
-		    has_i = true;
-		    continue;
-		  }
-		break;
-
-	      default: break;
-	      }
-	    return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
-	  }}
+                /* 1st 3d-perspective 0.0f 128.0f 3d 1s -- in 2 million lines of public scheme code, not one actual use! */
+              case 's': case 'S':
+              case 'd': case 'D':
+              case 'f': case 'F':
+              case 'l': case 'L':
+#endif
+              case 'e': case 'E':
+                if (current_radix > 10) /* see above */
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+                /* fall through -- if '@' used, radices>10 are ok */
+
+              case '@':
+                current_radix = 10;
+
+                if (((ex1) ||
+                     (slash1)) &&
+                    (has_plus_or_minus == 0)) /* ee */
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                if (((ex2) ||
+                     (slash2)) &&
+                    (has_plus_or_minus != 0)) /* 1+1.0ee */
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                if ((!is_digit(p[-1], radix)) && /* was current_radix but that's always 10! */
+                    (p[-1] != '.'))
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                if (has_plus_or_minus == 0)
+                  {
+                    ex1 = p;
+                    has_dec_point1 = true; /* decimal point illegal from now on */
+                  }
+                else
+                  {
+                    ex2 = p;
+                    has_dec_point2 = true;
+                  }
+                p++;
+                if ((*p == '-') || (*p == '+')) p++;
+                if (is_digit(*p, current_radix))
+                  continue;
+                break;
+
+                /* -------- internal + or - -------- */
+              case '+':
+              case '-':
+                if (has_plus_or_minus != 0) /* already have the separator */
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                has_plus_or_minus = (c == '+') ? 1 : -1;
+                plus = (char *)(p + 1);
+                /* now check for nan/inf as imaginary part */
+
+                if ((plus[0] == 'n') &&
+                    (local_strncmp(plus, "nan.", 4)))
+                  {
+                    bool overflow1 = false;
+                    int64_t payload = string_to_integer((char *)(p + 5), 10, &overflow1);
+                    return(nan2_or_bust(sc, nan_with_payload(payload), q, radix, want_symbol, (intptr_t)(p - q)));
+                  }
+                if ((plus[0] == 'i') &&
+                    (local_strcmp(plus, "inf.0i")))
+                  return(nan2_or_bust(sc, (c == '+') ? INFINITY : -INFINITY, q, radix, want_symbol, (intptr_t)(p - q)));
+                continue;
+
+                /* ratio marker */
+              case '/':
+                if ((has_plus_or_minus == 0) &&
+                    ((ex1) ||
+                     (slash1) ||
+                     (has_dec_point1)))
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                if ((has_plus_or_minus != 0) &&
+                    ((ex2) ||
+                     (slash2) ||
+                     (has_dec_point2)))
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                if (has_plus_or_minus == 0)
+                  slash1 = (char *)(p + 1);
+                else slash2 = (char *)(p + 1);
+
+                if ((!is_digit(p[1], current_radix)) ||
+                    (!is_digit(p[-1], current_radix)))
+                  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+
+                continue;
+
+                /* -------- i for the imaginary part -------- */
+              case 'i':
+                if ((has_plus_or_minus != 0) &&
+                    (!has_i))
+                  {
+                    has_i = true;
+                    continue;
+                  }
+                break;
+
+              default: break;
+              }
+            return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+          }}
 
     if ((has_plus_or_minus != 0) &&        /* that is, we have an internal + or - */
-	(!has_i))                          /*   but no i for the imaginary part */
+        (!has_i))                          /*   but no i for the imaginary part */
       return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
 
 #if WITH_NUMBER_SEPARATOR
@@ -15851,152 +15851,152 @@ static s7_pointer make_atom(s7_scheme *sc, char *q, int32_t radix, bool want_sym
     if (has_i)
       {
 #if (!WITH_GMP)
-	s7_double rl = 0.0, im = 0.0;
+        s7_double rl = 0.0, im = 0.0;
 #else
-	char e1 = 0, e2 = 0;
+        char e1 = 0, e2 = 0;
 #endif
-	s7_pointer result;
-	s7_int len = safe_strlen(q);
-	char ql1, pl1;
+        s7_pointer result;
+        s7_int len = safe_strlen(q);
+        char ql1, pl1;
 
-	if (q[len - 1] != 'i')
-	  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+        if (q[len - 1] != 'i')
+          return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
 
-	/* save original string */
-	ql1 = q[len - 1];
-	pl1 = (*(plus - 1));
+        /* save original string */
+        ql1 = q[len - 1];
+        pl1 = (*(plus - 1));
 #if WITH_GMP
-	if (ex1) {e1 = *ex1; (*ex1) = '@';} /* for mpfr */
-	if (ex2) {e2 = *ex2; (*ex2) = '@';}
+        if (ex1) {e1 = *ex1; (*ex1) = '@';} /* for mpfr */
+        if (ex2) {e2 = *ex2; (*ex2) = '@';}
 #endif
-	/* look for cases like 1+i */
-	q[len - 1] = ((q[len - 2] == '+') || (q[len - 2] == '-')) ? '1' : '\0'; /* remove 'i' */
+        /* look for cases like 1+i */
+        q[len - 1] = ((q[len - 2] == '+') || (q[len - 2] == '-')) ? '1' : '\0'; /* remove 'i' */
 
-	(*((char *)(plus - 1))) = '\0';
+        (*((char *)(plus - 1))) = '\0';
 
 #if (!WITH_GMP)
-	if ((has_dec_point1) ||
-	    (ex1))  /* (string->number "1100.1+0.11i" 2) -- need to split into 2 honest reals before passing to non-base-10 str->dbl */
-	  rl = string_to_double_with_radix(q, radix, ignored);
-	else /* no decimal point, no exponent, a ratio (1/2+i for example, but 1+2/3i is handled below) */
-	  {
-	    if (slash1)
-	      {
-		/* here the overflow could be innocuous if it's in the denominator and the numerator is 0: 0/100000000000000000000000000000000000000 */
-		s7_int den, num = string_to_integer(q, radix, &overflow);
-		if (overflow) return(make_undefined_bignum(sc, q));
-		den = string_to_integer(slash1, radix, &overflow);
-		if (den == 0)
-		  rl = NAN;        /* real_part if complex */
-		else
-		  {
-		    if (num == 0)
-		      {
-			rl = 0.0;
-			overflow = false;
-		      }
-		    else
-		      {
-			if (overflow) return(make_undefined_bignum(sc, q)); /* denominator overflow */
-			rl = (long_double)num / (long_double)den; /* no gmp, so we do what we can */
-		      }}}
-	    else
-	      {
-		rl = (s7_double)string_to_integer(q, radix, &overflow);
-		if (overflow) return(make_undefined_bignum(sc, q));
-	      }}
-	if (rl == -0.0) rl = 0.0;
-
-	if ((has_dec_point2) ||
-	    (ex2))
-	  im = string_to_double_with_radix(plus, radix, ignored);
-	else
-	  {
-	    if (slash2) /* complex part I think */
-	      {
-		/* same as above: 0-0/100000000000000000000000000000000000000i */
-		s7_int den, num = string_to_integer(plus, radix, &overflow);
-		if (overflow) return(make_undefined_bignum(sc, q));
-		den = string_to_integer(slash2, radix, &overflow);
-		if (den == 0)
-		  im = NAN;
-		else
-		  {
-		    if (num == 0)
-		      {
-			im = 0.0;
-			overflow = false;
-		      }
-		    else
-		      {
-			if (overflow) return(make_undefined_bignum(sc, q)); /* denominator overflow */
-			im = (long_double)num / (long_double)den;
-		      }}}
-	    else
-	      {
-		im = (s7_double)string_to_integer(plus, radix, &overflow);
-		if (overflow) return(make_undefined_bignum(sc, q));
-	      }}
-	if ((has_plus_or_minus == -1) &&
-	    (im != 0.0))
-	  im = -im;
-	result = make_complex(sc, rl, im);
+        if ((has_dec_point1) ||
+            (ex1))  /* (string->number "1100.1+0.11i" 2) -- need to split into 2 honest reals before passing to non-base-10 str->dbl */
+          rl = string_to_double_with_radix(q, radix, ignored);
+        else /* no decimal point, no exponent, a ratio (1/2+i for example, but 1+2/3i is handled below) */
+          {
+            if (slash1)
+              {
+                /* here the overflow could be innocuous if it's in the denominator and the numerator is 0: 0/100000000000000000000000000000000000000 */
+                s7_int den, num = string_to_integer(q, radix, &overflow);
+                if (overflow) return(make_undefined_bignum(sc, q));
+                den = string_to_integer(slash1, radix, &overflow);
+                if (den == 0)
+                  rl = NAN;        /* real_part if complex */
+                else
+                  {
+                    if (num == 0)
+                      {
+                        rl = 0.0;
+                        overflow = false;
+                      }
+                    else
+                      {
+                        if (overflow) return(make_undefined_bignum(sc, q)); /* denominator overflow */
+                        rl = (long_double)num / (long_double)den; /* no gmp, so we do what we can */
+                      }}}
+            else
+              {
+                rl = (s7_double)string_to_integer(q, radix, &overflow);
+                if (overflow) return(make_undefined_bignum(sc, q));
+              }}
+        if (rl == -0.0) rl = 0.0;
+
+        if ((has_dec_point2) ||
+            (ex2))
+          im = string_to_double_with_radix(plus, radix, ignored);
+        else
+          {
+            if (slash2) /* complex part I think */
+              {
+                /* same as above: 0-0/100000000000000000000000000000000000000i */
+                s7_int den, num = string_to_integer(plus, radix, &overflow);
+                if (overflow) return(make_undefined_bignum(sc, q));
+                den = string_to_integer(slash2, radix, &overflow);
+                if (den == 0)
+                  im = NAN;
+                else
+                  {
+                    if (num == 0)
+                      {
+                        im = 0.0;
+                        overflow = false;
+                      }
+                    else
+                      {
+                        if (overflow) return(make_undefined_bignum(sc, q)); /* denominator overflow */
+                        im = (long_double)num / (long_double)den;
+                      }}}
+            else
+              {
+                im = (s7_double)string_to_integer(plus, radix, &overflow);
+                if (overflow) return(make_undefined_bignum(sc, q));
+              }}
+        if ((has_plus_or_minus == -1) &&
+            (im != 0.0))
+          im = -im;
+        result = make_complex(sc, rl, im);
 #else
-	result = string_to_either_complex(sc, q, slash1, ex1, has_dec_point1, plus, slash2, ex2, has_dec_point2, radix, has_plus_or_minus);
+        result = string_to_either_complex(sc, q, slash1, ex1, has_dec_point1, plus, slash2, ex2, has_dec_point2, radix, has_plus_or_minus);
 #endif
-	/* restore original string */
-	q[len - 1] = ql1;
-	(*((char *)(plus - 1))) = pl1;
+        /* restore original string */
+        q[len - 1] = ql1;
+        (*((char *)(plus - 1))) = pl1;
 #if WITH_GMP
-	if (ex1) (*ex1) = e1;
-	if (ex2) (*ex2) = e2;
+        if (ex1) (*ex1) = e1;
+        if (ex2) (*ex2) = e2;
 #endif
-	return(result);
+        return(result);
       }
 
     /* not complex */
     if ((has_dec_point1) ||
-	(ex1))
+        (ex1))
       {
-	s7_pointer result;
-	if (slash1)  /* not complex, so slash and "." is not a number */
-	  return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
+        s7_pointer result;
+        if (slash1)  /* not complex, so slash and "." is not a number */
+          return((want_symbol) ? make_symbol_with_strlen(sc, q) : sc->F);
 
 #if (!WITH_GMP)
-	result = make_real(sc, string_to_double_with_radix(q, radix, ignored));
+        result = make_real(sc, string_to_double_with_radix(q, radix, ignored));
 #else
-	{
-	  char old_e = 0;
-	  if (ex1)
-	    {
-	      old_e = (*ex1);
-	      (*ex1) = '@';
-	    }
-	  result = string_to_either_real(sc, q, radix);
-	  if (ex1)
-	    (*ex1) = old_e;
-	}
-#endif
-	return(result);
+        {
+          char old_e = 0;
+          if (ex1)
+            {
+              old_e = (*ex1);
+              (*ex1) = '@';
+            }
+          result = string_to_either_real(sc, q, radix);
+          if (ex1)
+            (*ex1) = old_e;
+        }
+#endif
+        return(result);
       }
 
     /* rational */
     if (slash1)
 #if (!WITH_GMP)
       {
-	s7_int d, n = string_to_integer(q, radix, &overflow);
-	if (overflow) return(make_undefined_bignum(sc, q));
-	d = string_to_integer(slash1, radix, &overflow);
-
-	if ((n == 0) && (d != 0))                        /* 0/100000000000000000000000000000000000000 */
-	  return(int_zero);
-	if (d == 0) return(real_NaN);
-	if (overflow) return(make_undefined_bignum(sc, q));
-	/* it would be neat to return 1 from 10000000000000000000000000000/10000000000000000000000000000
-	 *   but q is the entire number ('/' included) and slash1 is the stuff after the '/', and every
-	 *   big number comes through here, so there's no clean and safe way to check that q == slash1.
-	 */
-	return(make_ratio(sc, n, d));
+        s7_int d, n = string_to_integer(q, radix, &overflow);
+        if (overflow) return(make_undefined_bignum(sc, q));
+        d = string_to_integer(slash1, radix, &overflow);
+
+        if ((n == 0) && (d != 0))                        /* 0/100000000000000000000000000000000000000 */
+          return(int_zero);
+        if (d == 0) return(real_NaN);
+        if (overflow) return(make_undefined_bignum(sc, q));
+        /* it would be neat to return 1 from 10000000000000000000000000000/10000000000000000000000000000
+         *   but q is the entire number ('/' included) and slash1 is the stuff after the '/', and every
+         *   big number comes through here, so there's no clean and safe way to check that q == slash1.
+         */
+        return(make_ratio(sc, n, d));
       }
 #else
     return(string_to_either_ratio(sc, q, slash1, radix));
@@ -16061,10 +16061,10 @@ static s7_pointer g_string_to_number_1(s7_scheme *sc, s7_pointer args, s7_pointe
     {
       s7_pointer rad = cadr(args);
       if (!s7_is_integer(rad))
-	return(method_or_bust(sc, rad, caller, args, sc->type_names[T_INTEGER], 2));
+        return(method_or_bust(sc, rad, caller, args, sc->type_names[T_INTEGER], 2));
       radix = s7_integer_clamped_if_gmp(sc, rad);
       if ((radix < 2) || (radix > 16))
-	out_of_range_error_nr(sc, caller, int_two, rad, a_valid_radix_string);
+        out_of_range_error_nr(sc, caller, int_two, rad, a_valid_radix_string);
     }
   else radix = 10;
   str = (char *)string_value(car(args));
@@ -16097,7 +16097,7 @@ static inline s7_pointer abs_p_p(s7_scheme *sc, s7_pointer x)
   if (is_t_real(x))
     {
       if (is_NaN(real(x)))
-	return((nan_payload(real(x)) > 0) ? x : real_NaN);         /* (abs -nan.0) -> +nan.0?? */
+        return((nan_payload(real(x)) > 0) ? x : real_NaN);         /* (abs -nan.0) -> +nan.0?? */
       return((signbit(real(x))) ? make_real(sc, -real(x)) : x);
     }
 #endif
@@ -16107,14 +16107,14 @@ static inline s7_pointer abs_p_p(s7_scheme *sc, s7_pointer x)
       if (integer(x) >= 0) return(x);
 #if WITH_GMP
       if (integer(x) == S7_INT64_MIN)
-	{
-	  x = s7_int_to_big_integer(sc, integer(x));
-	  mpz_neg(big_integer(x), big_integer(x));
-	  return(x);
-	}
+        {
+          x = s7_int_to_big_integer(sc, integer(x));
+          mpz_neg(big_integer(x), big_integer(x));
+          return(x);
+        }
 #else
       if (integer(x) == S7_INT64_MIN)
-	sole_arg_out_of_range_error_nr(sc, sc->abs_symbol, set_elist_1(sc, x), result_is_too_large_string);
+        sole_arg_out_of_range_error_nr(sc, sc->abs_symbol, set_elist_1(sc, x), result_is_too_large_string);
 #endif
       return(make_integer(sc, -integer(x)));
 
@@ -16122,27 +16122,27 @@ static inline s7_pointer abs_p_p(s7_scheme *sc, s7_pointer x)
       if (numerator(x) >= 0) return(x);
 #if WITH_GMP && (!POINTER_32)
       if (numerator(x) == S7_INT64_MIN)
-	{
-	  s7_pointer p;
-	  mpz_set_si(sc->mpz_1, S7_INT64_MIN);
-	  mpz_neg(sc->mpz_1, sc->mpz_1);
-	  mpz_set_si(sc->mpz_2, denominator(x));
-	  new_cell(sc, p, T_BIG_RATIO);
-	  big_ratio_bgr(p) = alloc_bigrat(sc);
-	  add_big_ratio(sc, p);
-	  mpq_set_num(big_ratio(p), sc->mpz_1);
-	  mpq_set_den(big_ratio(p), sc->mpz_2);
-	  return(p);
-	}
+        {
+          s7_pointer p;
+          mpz_set_si(sc->mpz_1, S7_INT64_MIN);
+          mpz_neg(sc->mpz_1, sc->mpz_1);
+          mpz_set_si(sc->mpz_2, denominator(x));
+          new_cell(sc, p, T_BIG_RATIO);
+          big_ratio_bgr(p) = alloc_bigrat(sc);
+          add_big_ratio(sc, p);
+          mpq_set_num(big_ratio(p), sc->mpz_1);
+          mpq_set_den(big_ratio(p), sc->mpz_2);
+          return(p);
+        }
 #else
       if (numerator(x) == S7_INT64_MIN)
-	return(make_ratio(sc, S7_INT64_MAX, denominator(x)));
+        return(make_ratio(sc, S7_INT64_MAX, denominator(x)));
 #endif
       return(make_simple_ratio(sc, -numerator(x), denominator(x)));
 
     case T_REAL:
       if (is_NaN(real(x)))                  /* (abs -nan.0) -> +nan.0, not -nan.0 */
-	return((nan_payload(real(x)) > 0) ? x : real_NaN);
+        return((nan_payload(real(x)) > 0) ? x : real_NaN);
       return((signbit(real(x))) ? make_real(sc, -real(x)) : x); /* (abs -0.0) returns -0.0 -- Shiro Kawai */
 #if WITH_GMP
     case T_BIG_INTEGER:
@@ -16200,7 +16200,7 @@ static s7_pointer magnitude_p_p(s7_scheme *sc, s7_pointer x)
       return((numerator(x) < 0) ? make_simple_ratio(sc, -numerator(x), denominator(x)) : x);
     case T_REAL:
       if (is_NaN(real(x)))                 /* (magnitude -nan.0) -> +nan.0, not -nan.0 */
-	return((nan_payload(real(x)) > 0) ? x : real_NaN);
+        return((nan_payload(real(x)) > 0) ? x : real_NaN);
       return((signbit(real(x))) ? make_real(sc, -real(x)) : x);
 #if WITH_GMP
     case T_BIG_INTEGER:
@@ -16278,9 +16278,9 @@ static s7_pointer big_rationalize(s7_scheme *sc, s7_pointer args)
       break;
     case T_REAL:
       if (is_NaN(real(pp0)))
-	out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_nan_string);
+        out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_nan_string);
       if (is_inf(real(pp0)))
-	out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_infinite_string);
+        out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_infinite_string);
       mpfr_set_d(r->ux, real(pp0), MPFR_RNDN);
       break;
     case T_BIG_INTEGER:
@@ -16291,9 +16291,9 @@ static s7_pointer big_rationalize(s7_scheme *sc, s7_pointer args)
       break;
     case T_BIG_REAL:
       if (mpfr_nan_p(big_real(pp0)))
-	out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_nan_string);
+        out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_nan_string);
       if (mpfr_inf_p(big_real(pp0)))
-	out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_infinite_string);
+        out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, pp0, it_is_infinite_string);
       mpfr_set(r->ux, big_real(pp0), MPFR_RNDN);
       break;
     case T_COMPLEX:
@@ -16309,40 +16309,40 @@ static s7_pointer big_rationalize(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer pp1 = cadr(args);
       switch (type(pp1))
-	{
-	case T_INTEGER:
-	  mpfr_set_si(r->error, integer(pp1), MPFR_RNDN);
-	  break;
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(pp1), denominator(pp1));
-	  mpfr_set_q(r->error, sc->mpq_1, MPFR_RNDN);
-	  break;
-	case T_REAL:
-	  if (is_NaN(real(pp1)))
-	    out_of_range_error_nr(sc, sc->rationalize_symbol, int_two, pp1, it_is_nan_string);
-	  if (is_inf(real(pp1)))
-	    return(int_zero);
-	  mpfr_set_d(r->error, real(pp1), MPFR_RNDN);
-	  break;
-	case T_BIG_INTEGER:
-	  mpfr_set_z(r->error, big_integer(pp1), MPFR_RNDN);
-	  break;
-	case T_BIG_RATIO:
-	  mpfr_set_q(r->error, big_ratio(pp1), MPFR_RNDN);
-	  break;
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(pp1)))
-	    out_of_range_error_nr(sc, sc->rationalize_symbol, int_two, pp1, it_is_nan_string);
-	  if (mpfr_inf_p(big_real(pp1)))
-	    return(int_zero);
-	  mpfr_set(r->error, big_real(pp1), MPFR_RNDN);
-	  break;
-	case T_COMPLEX:
-	case T_BIG_COMPLEX:
-	  wrong_type_error_nr(sc, sc->rationalize_symbol, 2, pp1, sc->type_names[T_REAL]);
-	default:
-	  return(method_or_bust(sc, pp1, sc->rationalize_symbol, args, sc->type_names[T_REAL], 2));
-	}
+        {
+        case T_INTEGER:
+          mpfr_set_si(r->error, integer(pp1), MPFR_RNDN);
+          break;
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(pp1), denominator(pp1));
+          mpfr_set_q(r->error, sc->mpq_1, MPFR_RNDN);
+          break;
+        case T_REAL:
+          if (is_NaN(real(pp1)))
+            out_of_range_error_nr(sc, sc->rationalize_symbol, int_two, pp1, it_is_nan_string);
+          if (is_inf(real(pp1)))
+            return(int_zero);
+          mpfr_set_d(r->error, real(pp1), MPFR_RNDN);
+          break;
+        case T_BIG_INTEGER:
+          mpfr_set_z(r->error, big_integer(pp1), MPFR_RNDN);
+          break;
+        case T_BIG_RATIO:
+          mpfr_set_q(r->error, big_ratio(pp1), MPFR_RNDN);
+          break;
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(pp1)))
+            out_of_range_error_nr(sc, sc->rationalize_symbol, int_two, pp1, it_is_nan_string);
+          if (mpfr_inf_p(big_real(pp1)))
+            return(int_zero);
+          mpfr_set(r->error, big_real(pp1), MPFR_RNDN);
+          break;
+        case T_COMPLEX:
+        case T_BIG_COMPLEX:
+          wrong_type_error_nr(sc, sc->rationalize_symbol, 2, pp1, sc->type_names[T_REAL]);
+        default:
+          return(method_or_bust(sc, pp1, sc->rationalize_symbol, args, sc->type_names[T_REAL], 2));
+        }
       mpfr_abs(r->error, r->error, MPFR_RNDN);
     }
 
@@ -16355,11 +16355,11 @@ static s7_pointer big_rationalize(s7_scheme *sc, s7_pointer args)
   if (mpfr_cmp_ui(r->error, 1) >= 0)            /* if (error >= 1.0) */
     {
       if (mpfr_cmp_ui(r->x0, 0) < 0)            /* if (x0 < 0) */
-	{
-	  if (mpfr_cmp_ui(r->x1, 0) < 0)        /*   if (x1 < 0) */
-	    mpfr_get_z(r->n, r->x1, MPFR_RNDD); /*     num = floor(x1) */
-	  else mpz_set_ui(r->n, 0);             /*   else num = 0 */
-	}
+        {
+          if (mpfr_cmp_ui(r->x1, 0) < 0)        /*   if (x1 < 0) */
+            mpfr_get_z(r->n, r->x1, MPFR_RNDD); /*     num = floor(x1) */
+          else mpz_set_ui(r->n, 0);             /*   else num = 0 */
+        }
       else mpz_set(r->n, r->i);                 /* else num = i */
       return(mpz_to_integer(sc, r->n));
     }
@@ -16367,7 +16367,7 @@ static s7_pointer big_rationalize(s7_scheme *sc, s7_pointer args)
   if (mpfr_cmp_z(r->x1, r->i) >= 0)             /* if (x1 >= i) */
     {
       if (mpz_cmp_ui(r->i, 0) >= 0)             /* if (i >= 0) */
-	mpz_set(r->n, r->i);                    /*   num = i */
+        mpz_set(r->n, r->i);                    /*   num = i */
       else mpfr_get_z(r->n, r->x1, MPFR_RNDD);  /* else num = floor(x1) */
       return(mpz_to_integer(sc, r->n));
     }
@@ -16392,22 +16392,22 @@ static s7_pointer big_rationalize(s7_scheme *sc, s7_pointer args)
       mpfr_div_z(r->val, r->val, r->q0, MPFR_RNDN);  /* val = p0/q0 */
 
       if (((mpfr_lessequal_p(r->x0, r->val)) &&        /* if ((x0 <= val) && (val <= x1)) */
-	   (mpfr_lessequal_p(r->val, r->x1))) ||
-	  (mpfr_cmp_ui(r->e1, 0) == 0) ||
-	  (mpfr_cmp_ui(r->e1p, 0) == 0))
-	/* these last 2 are probably not needed -- they protect against running out of bits in the non-gmp case above */
-	{
-	  mpq_set_num(r->q, r->p0);                /* return(p0/q0) */
-	  mpq_set_den(r->q, r->q0);
-	  return(mpq_to_rational(sc, r->q));
-	}
+           (mpfr_lessequal_p(r->val, r->x1))) ||
+          (mpfr_cmp_ui(r->e1, 0) == 0) ||
+          (mpfr_cmp_ui(r->e1p, 0) == 0))
+        /* these last 2 are probably not needed -- they protect against running out of bits in the non-gmp case above */
+        {
+          mpq_set_num(r->q, r->p0);                /* return(p0/q0) */
+          mpq_set_den(r->q, r->q0);
+          return(mpq_to_rational(sc, r->q));
+        }
 
       mpfr_div(r->val, r->e0, r->e1, MPFR_RNDN);
       mpfr_get_z(r->r, r->val, MPFR_RNDD);           /* r = floor(e0/e1) */
       mpfr_div(r->val, r->e0p, r->e1p, MPFR_RNDN);
       mpfr_get_z(r->r1, r->val, MPFR_RNDU);          /* r1 = ceil(e0p/e1p) */
       if (mpz_cmp(r->r1, r->r) < 0)                 /* if (r1 < r) */
-	mpz_set(r->r, r->r1);                       /*   r = r1 */
+        mpz_set(r->r, r->r1);                       /*   r = r1 */
 
       mpz_set(r->old_p1, r->p1);                    /* old_p1 = p1 */
       mpz_set(r->p1, r->p0);                        /* p1 = p0 */
@@ -16458,13 +16458,13 @@ static s7_pointer g_rationalize(s7_scheme *sc, s7_pointer args)
       s7_pointer ex = cadr(args);
 #if WITH_GMP
       if (is_big_number(ex))
-	return(big_rationalize(sc, args));
+        return(big_rationalize(sc, args));
 #endif
       if (!is_real(ex))
-	return(method_or_bust(sc, ex, sc->rationalize_symbol, args, sc->type_names[T_REAL], 2));
+        return(method_or_bust(sc, ex, sc->rationalize_symbol, args, sc->type_names[T_REAL], 2));
       err = real_to_double(sc, ex, "rationalize");
       if (is_NaN(err))
-	out_of_range_error_nr(sc, sc->rationalize_symbol, int_two, ex, it_is_nan_string);
+        out_of_range_error_nr(sc, sc->rationalize_symbol, int_two, ex, it_is_nan_string);
       if (err < 0.0) err = -err;
     }
 
@@ -16472,48 +16472,48 @@ static s7_pointer g_rationalize(s7_scheme *sc, s7_pointer args)
     {
     case T_INTEGER:
       {
-	s7_int a, b, pa;
-	if (err < 1.0) return(x);
-	a = integer(x);
-	pa = (a < 0) ? -a : a;
-	if (err >= pa) return(int_zero);
-	b = (s7_int)err;
-	pa -= b;
-	return(make_integer(sc, (a < 0) ? -pa : pa));
+        s7_int a, b, pa;
+        if (err < 1.0) return(x);
+        a = integer(x);
+        pa = (a < 0) ? -a : a;
+        if (err >= pa) return(int_zero);
+        b = (s7_int)err;
+        pa -= b;
+        return(make_integer(sc, (a < 0) ? -pa : pa));
       }
 
     case T_RATIO:
       if (err == 0.0)
-	return(x);
+        return(x);
 
     case T_REAL:
       {
-	s7_double rat = s7_real(x); /* possible fall through from above */
-	s7_int numer = 0, denom = 1;
+        s7_double rat = s7_real(x); /* possible fall through from above */
+        s7_int numer = 0, denom = 1;
 
-	if ((is_NaN(rat)) || (is_inf(rat)))
-	  out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, x, a_normal_real_string);
+        if ((is_NaN(rat)) || (is_inf(rat)))
+          out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, x, a_normal_real_string);
 
-	if (err >= fabs(rat))
-	  return(int_zero);
+        if (err >= fabs(rat))
+          return(int_zero);
 
 #if WITH_GMP
-	if (fabs(rat) > RATIONALIZE_LIMIT)
-	  return(big_rationalize(sc, set_plist_2(sc, x, wrap_real(sc, err))));
+        if (fabs(rat) > RATIONALIZE_LIMIT)
+          return(big_rationalize(sc, set_plist_2(sc, x, wrap_real(sc, err))));
 #else
-	if (fabs(rat) > RATIONALIZE_LIMIT)
-	  out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, x, it_is_too_large_string);
+        if (fabs(rat) > RATIONALIZE_LIMIT)
+          out_of_range_error_nr(sc, sc->rationalize_symbol, int_one, x, it_is_too_large_string);
 #endif
-	if ((fabs(rat) + fabs(err)) < 1.0e-18)
-	  err = 1.0e-18;
-	/* (/ 1.0 most-positive-fixnum) is 1.0842021e-19, so if we let err be less than that,
-	 * (rationalize 1e-19 1e-20) hangs, but this only affects the initial ceiling, I believe.
-	 */
+        if ((fabs(rat) + fabs(err)) < 1.0e-18)
+          err = 1.0e-18;
+        /* (/ 1.0 most-positive-fixnum) is 1.0842021e-19, so if we let err be less than that,
+         * (rationalize 1e-19 1e-20) hangs, but this only affects the initial ceiling, I believe.
+         */
 
-	if (fabs(rat) < fabs(err))
-	  return(int_zero);
+        if (fabs(rat) < fabs(err))
+          return(int_zero);
 
-	return((c_rationalize(rat, err, &numer, &denom)) ? make_ratio(sc, numer, denom) : sc->F);
+        return((c_rationalize(rat, err, &numer, &denom)) ? make_ratio(sc, numer, denom) : sc->F);
       }}
   return(sc->F); /* make compiler happy */
 }
@@ -16558,12 +16558,12 @@ static s7_pointer g_angle(s7_scheme *sc, s7_pointer args)
       return((mpfr_cmp_d(big_real(x), 0.0) >= 0) ? real_zero : big_pi(sc));
     case T_BIG_COMPLEX:
       {
-	s7_pointer z;
-	new_cell(sc, z, T_BIG_REAL);
-	big_real_bgf(z) = alloc_bigflt(sc);
-	add_big_real(sc, z);
-	mpc_arg(big_real(z), big_complex(x), MPFR_RNDN);
-	return(z);
+        s7_pointer z;
+        new_cell(sc, z, T_BIG_REAL);
+        big_real_bgf(z) = alloc_bigflt(sc);
+        add_big_real(sc, z);
+        mpc_arg(big_real(z), big_complex(x), MPFR_RNDN);
+        return(z);
       }
 #endif
     default:
@@ -16582,55 +16582,55 @@ static s7_pointer complex_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
       s7_pointer p0 = x, p1 = y, p = NULL;
 
       if (!is_real(p0))
-	return(method_or_bust(sc, p0, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
+        return(method_or_bust(sc, p0, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
       if (!is_real(p1))
-	return(method_or_bust(sc, p1, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 2));
+        return(method_or_bust(sc, p1, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 2));
 
       switch (type(p1))
-	{
-	case T_INTEGER: case T_RATIO: case T_REAL:
-	  {
-	    s7_double iz = s7_real(p1);
-	    if (iz == 0.0)                      /* imag-part is 0.0 */
-	      return(p0);
-	    new_cell(sc, p, T_BIG_COMPLEX);
-	    big_complex_bgc(p) = alloc_bigcmp(sc);
-	    mpfr_set_d(mpc_imagref(big_complex(p)), iz, MPFR_RNDN);
-	  }
-	  break;
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(p1))) return(p0);
-	  new_cell(sc, p, T_BIG_COMPLEX);
-	  big_complex_bgc(p) = alloc_bigcmp(sc);
-	  mpfr_set(mpc_imagref(big_complex(p)), big_real(p1), MPFR_RNDN);
-	  break;
-	case T_BIG_RATIO:
-	  new_cell(sc, p, T_BIG_COMPLEX);
-	  big_complex_bgc(p) = alloc_bigcmp(sc);
-	  mpfr_set_q(mpc_imagref(big_complex(p)), big_ratio(p1), MPFR_RNDN);
-	  break;
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(p1), 0) == 0) return(p0);
-	  new_cell(sc, p, T_BIG_COMPLEX);
-	  big_complex_bgc(p) = alloc_bigcmp(sc);
-	  mpfr_set_z(mpc_imagref(big_complex(p)), big_integer(p1), MPFR_RNDN);
-	  break;
-	}
+        {
+        case T_INTEGER: case T_RATIO: case T_REAL:
+          {
+            s7_double iz = s7_real(p1);
+            if (iz == 0.0)                      /* imag-part is 0.0 */
+              return(p0);
+            new_cell(sc, p, T_BIG_COMPLEX);
+            big_complex_bgc(p) = alloc_bigcmp(sc);
+            mpfr_set_d(mpc_imagref(big_complex(p)), iz, MPFR_RNDN);
+          }
+          break;
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(p1))) return(p0);
+          new_cell(sc, p, T_BIG_COMPLEX);
+          big_complex_bgc(p) = alloc_bigcmp(sc);
+          mpfr_set(mpc_imagref(big_complex(p)), big_real(p1), MPFR_RNDN);
+          break;
+        case T_BIG_RATIO:
+          new_cell(sc, p, T_BIG_COMPLEX);
+          big_complex_bgc(p) = alloc_bigcmp(sc);
+          mpfr_set_q(mpc_imagref(big_complex(p)), big_ratio(p1), MPFR_RNDN);
+          break;
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(p1), 0) == 0) return(p0);
+          new_cell(sc, p, T_BIG_COMPLEX);
+          big_complex_bgc(p) = alloc_bigcmp(sc);
+          mpfr_set_z(mpc_imagref(big_complex(p)), big_integer(p1), MPFR_RNDN);
+          break;
+        }
       switch (type(p0))
-	{
-	case T_INTEGER: case T_RATIO: case T_REAL:
-	  mpfr_set_d(mpc_realref(big_complex(p)), s7_real(p0), MPFR_RNDN);
-	  break;
-	case T_BIG_REAL:
-	  mpfr_set(mpc_realref(big_complex(p)), big_real(p0), MPFR_RNDN);
-	  break;
-	case T_BIG_RATIO:
-	  mpfr_set_q(mpc_realref(big_complex(p)), big_ratio(p0), MPFR_RNDN);
-	  break;
-	case T_BIG_INTEGER:
-	  mpfr_set_z(mpc_realref(big_complex(p)), big_integer(p0), MPFR_RNDN);
-	  break;
-	}
+        {
+        case T_INTEGER: case T_RATIO: case T_REAL:
+          mpfr_set_d(mpc_realref(big_complex(p)), s7_real(p0), MPFR_RNDN);
+          break;
+        case T_BIG_REAL:
+          mpfr_set(mpc_realref(big_complex(p)), big_real(p0), MPFR_RNDN);
+          break;
+        case T_BIG_RATIO:
+          mpfr_set_q(mpc_realref(big_complex(p)), big_ratio(p0), MPFR_RNDN);
+          break;
+        case T_BIG_INTEGER:
+          mpfr_set_z(mpc_realref(big_complex(p)), big_integer(p0), MPFR_RNDN);
+          break;
+        }
       add_big_complex(sc, p);
       return(p);
     }
@@ -16640,32 +16640,32 @@ static s7_pointer complex_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       switch (type(x))
-	{
-	case T_INTEGER: return((integer(y) == 0) ? x : make_complex_not_0i(sc, (s7_double)integer(x), (s7_double)integer(y)));
-	  /* these int->dbl's are problematic:
-	   *   (complex 9223372036854775807 9007199254740995): 9223372036854776000.0+9007199254740996.0i
-	   * should we raise an error?
-	   */
-	case T_RATIO:  return((integer(y) == 0) ? x : make_complex_not_0i(sc, (s7_double)fraction(x), (s7_double)integer(y)));
-	case T_REAL:   return((integer(y) == 0) ? x : make_complex_not_0i(sc, real(x), (s7_double)integer(y)));
-	default:       return(method_or_bust(sc, x, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
-	}
+        {
+        case T_INTEGER: return((integer(y) == 0) ? x : make_complex_not_0i(sc, (s7_double)integer(x), (s7_double)integer(y)));
+          /* these int->dbl's are problematic:
+           *   (complex 9223372036854775807 9007199254740995): 9223372036854776000.0+9007199254740996.0i
+           * should we raise an error?
+           */
+        case T_RATIO:  return((integer(y) == 0) ? x : make_complex_not_0i(sc, (s7_double)fraction(x), (s7_double)integer(y)));
+        case T_REAL:   return((integer(y) == 0) ? x : make_complex_not_0i(sc, real(x), (s7_double)integer(y)));
+        default:       return(method_or_bust(sc, x, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
+        }
     case T_RATIO:
       switch (type(x))
-	{
-	case T_INTEGER: return(make_complex(sc, (s7_double)integer(x), (s7_double)fraction(y))); /* can fraction be 0.0? */
-	case T_RATIO:   return(make_complex(sc, (s7_double)fraction(x), (s7_double)fraction(y)));
-	case T_REAL:    return(make_complex(sc, real(x), (s7_double)fraction(y)));
-	default:	return(method_or_bust(sc, x, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
-	}
+        {
+        case T_INTEGER: return(make_complex(sc, (s7_double)integer(x), (s7_double)fraction(y))); /* can fraction be 0.0? */
+        case T_RATIO:   return(make_complex(sc, (s7_double)fraction(x), (s7_double)fraction(y)));
+        case T_REAL:    return(make_complex(sc, real(x), (s7_double)fraction(y)));
+        default:        return(method_or_bust(sc, x, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
+        }
     case T_REAL:
       switch (type(x))
-	{
-	case T_INTEGER: return((real(y) == 0.0) ? x : make_complex_not_0i(sc, (s7_double)integer(x), real(y)));
-	case T_RATIO:	return((real(y) == 0.0) ? x : make_complex_not_0i(sc, (s7_double)fraction(x), real(y)));
-	case T_REAL:    return((real(y) == 0.0) ? x : make_complex_not_0i(sc, real(x), real(y)));
-	default:	return(method_or_bust(sc, x, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
-	}
+        {
+        case T_INTEGER: return((real(y) == 0.0) ? x : make_complex_not_0i(sc, (s7_double)integer(x), real(y)));
+        case T_RATIO:        return((real(y) == 0.0) ? x : make_complex_not_0i(sc, (s7_double)fraction(x), real(y)));
+        case T_REAL:    return((real(y) == 0.0) ? x : make_complex_not_0i(sc, real(x), real(y)));
+        default:        return(method_or_bust(sc, x, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 1));
+        }
     default:
       return(method_or_bust(sc, (is_let(x)) ? x : y, sc->complex_symbol, set_plist_2(sc, x, y), sc->type_names[T_REAL], 2));
     }
@@ -16707,17 +16707,17 @@ bignum returns that number as a bignum"
   if (is_number(p))
     {
       if (!is_null(cdr(args)))
-	error_nr(sc, make_symbol(sc, "bignum-error", 12),
-		 set_elist_2(sc, wrap_string(sc, "bignum of a number takes only one argument: ~S", 46), args));
+        error_nr(sc, make_symbol(sc, "bignum-error", 12),
+                 set_elist_2(sc, wrap_string(sc, "bignum of a number takes only one argument: ~S", 46), args));
 #if WITH_GMP
       switch (type(p))
-	{
-	case T_INTEGER: return(s7_int_to_big_integer(sc, integer(p)));
-	case T_RATIO:   return(s7_int_to_big_ratio(sc, numerator(p), denominator(p)));
-	case T_REAL:    return(s7_double_to_big_real(sc, real(p)));
-	case T_COMPLEX: return(s7_double_to_big_complex(sc, real_part(p), imag_part(p)));
-	default:        return(p);
-	}
+        {
+        case T_INTEGER: return(s7_int_to_big_integer(sc, integer(p)));
+        case T_RATIO:   return(s7_int_to_big_ratio(sc, numerator(p), denominator(p)));
+        case T_REAL:    return(s7_double_to_big_real(sc, real(p)));
+        case T_COMPLEX: return(s7_double_to_big_complex(sc, real_part(p), imag_part(p)));
+        default:        return(p);
+        }
 #else
       return(p);
 #endif
@@ -16725,7 +16725,7 @@ bignum returns that number as a bignum"
   p = g_string_to_number_1(sc, args, sc->bignum_symbol);
   if (is_false(sc, p))                                       /* (bignum "1/3.0") */
     error_nr(sc, make_symbol(sc, "bignum-error", 12),
-	     set_elist_2(sc, wrap_string(sc, "bignum string argument does not represent a number: ~S", 54), car(args)));
+             set_elist_2(sc, wrap_string(sc, "bignum string argument does not represent a number: ~S", 54), car(args)));
 #if WITH_GMP
   switch (type(p))
     {
@@ -16778,7 +16778,7 @@ static s7_pointer exp_p_p(s7_scheme *sc, s7_pointer x)
       z = (s7_double)integer(x);
 #if WITH_GMP
       if (fabs(z) > EXP_LIMIT)
-	return(exp_1(sc, z));
+        return(exp_1(sc, z));
 #endif
       return(make_real(sc, exp(z)));
 
@@ -16786,14 +16786,14 @@ static s7_pointer exp_p_p(s7_scheme *sc, s7_pointer x)
       z = (s7_double)fraction(x);
 #if WITH_GMP
       if (fabs(z) > EXP_LIMIT)
-	return(exp_1(sc, z));
+        return(exp_1(sc, z));
 #endif
       return(make_real(sc, exp(z)));
 
     case T_REAL:
 #if WITH_GMP
       if (fabs(real(x)) > EXP_LIMIT)
-	return(exp_1(sc, real(x)));
+        return(exp_1(sc, real(x)));
 #endif
       return(make_real(sc, exp(real(x))));
 
@@ -16801,8 +16801,8 @@ static s7_pointer exp_p_p(s7_scheme *sc, s7_pointer x)
 #if HAVE_COMPLEX_NUMBERS
 #if WITH_GMP
       if ((fabs(real_part(x)) > EXP_LIMIT) ||
-	  (fabs(imag_part(x)) > EXP_LIMIT))
-	return(exp_2(sc, real_part(x), imag_part(x)));
+          (fabs(imag_part(x)) > EXP_LIMIT))
+        return(exp_2(sc, real_part(x), imag_part(x)));
 #endif
       return(c_complex_to_s7(sc, cexp(to_c_complex(x))));
       /* this is inaccurate for large arguments:
@@ -16827,7 +16827,7 @@ static s7_pointer exp_p_p(s7_scheme *sc, s7_pointer x)
     case T_BIG_COMPLEX:
       mpc_exp(sc->mpc_1, big_complex(x), MPC_RNDNN);
       if (mpfr_zero_p(mpc_imagref(sc->mpc_1)))
-	return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
+        return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
       return(mpc_to_number(sc, sc->mpc_1));
 #endif
     default:
@@ -16865,7 +16865,7 @@ static s7_pointer big_log(s7_scheme *sc, s7_pointer args)
     {
       p1 = cadr(args);
       if (!is_number(p1))
-	return(method_or_bust(sc, p1, sc->log_symbol, args, a_number_string, 2));
+        return(method_or_bust(sc, p1, sc->log_symbol, args, a_number_string, 2));
     }
 
   if (is_real(p0))
@@ -16873,38 +16873,38 @@ static s7_pointer big_log(s7_scheme *sc, s7_pointer args)
       res = any_real_to_mpfr(sc, p0, sc->mpfr_1);
       if (res == real_NaN) return(res);
       if ((is_positive(sc, p0)) &&
-	  ((!p1) ||
-	   ((is_real(p1)) && (is_positive(sc, p1)))))
-	{
-	  if (res) return(res);
-	  mpfr_log(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  if (p1)
-	    {
-	      res = any_real_to_mpfr(sc, p1, sc->mpfr_2);
-	      if (res)
-		return((res == real_infinity) ? real_zero : res);
-	      if (mpfr_zero_p(sc->mpfr_2))
-		out_of_range_error_nr(sc, sc->log_symbol, int_two, p1, wrap_string(sc, "can't be zero", 13));
-	      mpfr_log(sc->mpfr_2, sc->mpfr_2, MPFR_RNDN);
-	      mpfr_div(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
-	    }
-	  if ((mpfr_integer_p(sc->mpfr_1)) && ((is_rational(p0)) && ((!p1) || (is_rational(p1)))))
-	    return(mpfr_to_integer(sc, sc->mpfr_1));
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}}
+          ((!p1) ||
+           ((is_real(p1)) && (is_positive(sc, p1)))))
+        {
+          if (res) return(res);
+          mpfr_log(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          if (p1)
+            {
+              res = any_real_to_mpfr(sc, p1, sc->mpfr_2);
+              if (res)
+                return((res == real_infinity) ? real_zero : res);
+              if (mpfr_zero_p(sc->mpfr_2))
+                out_of_range_error_nr(sc, sc->log_symbol, int_two, p1, wrap_string(sc, "can't be zero", 13));
+              mpfr_log(sc->mpfr_2, sc->mpfr_2, MPFR_RNDN);
+              mpfr_div(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
+            }
+          if ((mpfr_integer_p(sc->mpfr_1)) && ((is_rational(p0)) && ((!p1) || (is_rational(p1)))))
+            return(mpfr_to_integer(sc, sc->mpfr_1));
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }}
   if (p1)
     {
       res = any_number_to_mpc(sc, p1, sc->mpc_2);
       if (res)
-	return((res == real_infinity) ? real_zero : complex_NaN);
+        return((res == real_infinity) ? real_zero : complex_NaN);
       if (mpc_zero_p(sc->mpc_2))
-	out_of_range_error_nr(sc, sc->log_symbol, int_two, p1, wrap_string(sc, "can't be zero", 13));
+        out_of_range_error_nr(sc, sc->log_symbol, int_two, p1, wrap_string(sc, "can't be zero", 13));
     }
   res = any_number_to_mpc(sc, p0, sc->mpc_1);
   if (res)
     {
       if ((res == real_infinity) && (p1) && ((is_negative(sc, p0))))
-	return(make_complex_not_0i(sc, INFINITY, -NAN));
+        return(make_complex_not_0i(sc, INFINITY, -NAN));
       return((res == real_NaN) ? complex_NaN : res);
     }
   mpc_log(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
@@ -16944,85 +16944,85 @@ static s7_pointer g_log(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer y = cadr(args);
       if (!(is_number(y)))
-	return(method_or_bust(sc, y, sc->log_symbol, args, a_number_string, 2));
+        return(method_or_bust(sc, y, sc->log_symbol, args, a_number_string, 2));
 
 #if WITH_GMP
       if (is_big_number(y)) return(big_log(sc, args));
 #endif
       if ((is_t_integer(y)) && (integer(y) == 2))
-	{
-	  /* (define (2^n? x) (and (not (zero? x)) (zero? (logand x (- x 1))))) */
-	  if (is_t_integer(x))
-	    {
-	      s7_int ix = integer(x);
-	      if (ix > 0)
-		{
-		  s7_double fx;
+        {
+          /* (define (2^n? x) (and (not (zero? x)) (zero? (logand x (- x 1))))) */
+          if (is_t_integer(x))
+            {
+              s7_int ix = integer(x);
+              if (ix > 0)
+                {
+                  s7_double fx;
 #if (__ANDROID__) || (MS_WINDOWS) || (((__GNUC__) && ((__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ <= 4)))) && (!defined(__clang__)))
-		  /* just a guess -- log2 gets a warning in gcc 4.3.2, but not in 4.4.4 */
-		  fx = log((double)ix) * LOG_2;
+                  /* just a guess -- log2 gets a warning in gcc 4.3.2, but not in 4.4.4 */
+                  fx = log((double)ix) * LOG_2;
 #else
-		  fx = log2((double)ix);
+                  fx = log2((double)ix);
 #endif
-		  /* (s7_int)fx rounds (log 8 2) to 2 in FreeBSD! */
+                  /* (s7_int)fx rounds (log 8 2) to 2 in FreeBSD! */
 #if (((__GNUC__) && ((__GNUC__ < 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ < 4)))) && (!defined(__clang__)))
-		  return(make_real(sc, fx));
+                  return(make_real(sc, fx));
 #else
-		  return(((ix & (ix - 1)) == 0) ? make_integer(sc, (s7_int)s7_round(fx)) : make_real(sc, fx));
+                  return(((ix & (ix - 1)) == 0) ? make_integer(sc, (s7_int)s7_round(fx)) : make_real(sc, fx));
 #endif
-		}}
-	  if ((is_real(x)) &&
-	      (is_positive(sc, x)))
-	    return(make_real(sc, log(s7_real(x)) * LOG_2));
-	  return(c_complex_to_s7(sc, clog(s7_to_c_complex(x)) * LOG_2));
-	}
+                }}
+          if ((is_real(x)) &&
+              (is_positive(sc, x)))
+            return(make_real(sc, log(s7_real(x)) * LOG_2));
+          return(c_complex_to_s7(sc, clog(s7_to_c_complex(x)) * LOG_2));
+        }
 
       if ((is_t_integer(x)) && (integer(x) == 1) && (is_t_integer(y)) && (integer(y) == 1))  /* (log 1 1) -> 0 (this is NaN in the bignum case) */
-	return(int_zero);
+        return(int_zero);
 
       /* (log 1 0) must be 0 since everyone says (expt 0 0) is 1 */
       if (is_zero(y))
-	{
-	  if ((is_t_integer(y)) && (is_t_integer(x)) && (integer(x) == 1))
-	    return(y);
-	  out_of_range_error_nr(sc, sc->log_symbol, int_two, y, wrap_string(sc, "can't be zero", 13));
-	}
+        {
+          if ((is_t_integer(y)) && (is_t_integer(x)) && (integer(x) == 1))
+            return(y);
+          out_of_range_error_nr(sc, sc->log_symbol, int_two, y, wrap_string(sc, "can't be zero", 13));
+        }
 
       if ((is_t_real(x)) && (is_NaN(real(x))))
-	return(x);
+        return(x);
       if (is_one(y))                                     /* this used to raise an error, but the bignum case is simpler if we return inf */
-	return((is_one(x)) ? real_zero : real_infinity); /* but (log 1.0 1.0) -> 0.0, currently (log 1/0 1) is inf? */
+        return((is_one(x)) ? real_zero : real_infinity); /* but (log 1.0 1.0) -> 0.0, currently (log 1/0 1) is inf? */
 
       if ((is_real(x)) &&
-	  (is_real(y)) &&
-	  (is_positive(sc, x)) &&
-	  (is_positive(sc, y)))
-	{
-	  if ((is_rational(x)) &&
-	      (is_rational(y)))
-	    {
-	      s7_double res = log(rational_to_double(sc, x)) / log(rational_to_double(sc, y));
-	      s7_int ires = (s7_int)res;
-	      if (res - ires == 0.0)
-		return(make_integer(sc, ires));   /* (log 8 2) -> 3 or (log 1/8 2) -> -3 */
-	      /* since x and y are rational here, it seems reasonable to try to rationalize the result, but not go overboard?
-	       *   what about (expt 16 3/2) -> 64?  also 2 as base is handled above and always returns a float.
-	       */
-	      if (fabs(res) < RATIONALIZE_LIMIT)
-		{
-		  s7_int num, den;
-		  if ((c_rationalize(res, sc->default_rationalize_error, &num, &den)) &&
-		      (s7_int_abs(num) < 100) && (s7_int_abs(den) < 100))
-		    return(make_simple_ratio(sc, num, den));
-		}
-	      return(make_real(sc, res));
-	    }
-	  return(make_real(sc, log(s7_real(x)) / log(s7_real(y))));
-	}
+          (is_real(y)) &&
+          (is_positive(sc, x)) &&
+          (is_positive(sc, y)))
+        {
+          if ((is_rational(x)) &&
+              (is_rational(y)))
+            {
+              s7_double res = log(rational_to_double(sc, x)) / log(rational_to_double(sc, y));
+              s7_int ires = (s7_int)res;
+              if (res - ires == 0.0)
+                return(make_integer(sc, ires));   /* (log 8 2) -> 3 or (log 1/8 2) -> -3 */
+              /* since x and y are rational here, it seems reasonable to try to rationalize the result, but not go overboard?
+               *   what about (expt 16 3/2) -> 64?  also 2 as base is handled above and always returns a float.
+               */
+              if (fabs(res) < RATIONALIZE_LIMIT)
+                {
+                  s7_int num, den;
+                  if ((c_rationalize(res, sc->default_rationalize_error, &num, &den)) &&
+                      (s7_int_abs(num) < 100) && (s7_int_abs(den) < 100))
+                    return(make_simple_ratio(sc, num, den));
+                }
+              return(make_real(sc, res));
+            }
+          return(make_real(sc, log(s7_real(x)) / log(s7_real(y))));
+        }
       if ((is_t_real(x)) && (is_NaN(real(x))))
-	return(x);
+        return(x);
       if ((is_t_complex(y)) && ((is_NaN(real_part(y))) || (is_NaN(imag_part(y)))))
-	return(y);
+        return(y);
       return(c_complex_to_s7(sc, clog(s7_to_c_complex(x)) / clog(s7_to_c_complex(y))));
     }
 
@@ -17040,7 +17040,7 @@ static s7_pointer log_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_poin
     {
       s7_pointer x = cadr(expr), y = caddr(expr);
       if ((is_t_integer(y)) && (integer(y) == 2) && (is_t_integer(x)) && (integer(x) > 0))
-	return(sc->int_log2);
+        return(sc->int_log2);
     }
 #endif
   return(f);
@@ -17064,12 +17064,12 @@ static s7_pointer sin_p_p(s7_scheme *sc, s7_pointer x)
       if (integer(x) == 0) return(int_zero);           /* (sin 0) -> 0 */
 #if WITH_GMP
       if (integer(x) > SIN_LIMIT)
-	{
-	  mpz_set_si(sc->mpz_1, integer(x));
-	  mpfr_set_z(sc->mpfr_1, sc->mpz_1, MPFR_RNDN);
-	  mpfr_sin(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpz_set_si(sc->mpz_1, integer(x));
+          mpfr_set_z(sc->mpfr_1, sc->mpz_1, MPFR_RNDN);
+          mpfr_sin(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
 #endif
       return(make_real(sc, sin((s7_double)(integer(x))))); /* bogus for very large integers, but so is the equivalent real (see SIN_LIMIT) */
 
@@ -17078,26 +17078,26 @@ static s7_pointer sin_p_p(s7_scheme *sc, s7_pointer x)
 
     case T_REAL:
       {
-	s7_double y = real(x);
+        s7_double y = real(x);
 #if WITH_GMP
-	if (fabs(y) > SIN_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
-	    mpfr_sin(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	    return(mpfr_to_big_real(sc, sc->mpfr_1));
-	  }
-#endif
-	return(make_real(sc, sin(y)));
+        if (fabs(y) > SIN_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
+            mpfr_sin(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+            return(mpfr_to_big_real(sc, sc->mpfr_1));
+          }
+#endif
+        return(make_real(sc, sin(y)));
       }
 
     case T_COMPLEX:
 #if WITH_GMP
       if ((fabs(real_part(x)) > SIN_LIMIT) || (fabs(imag_part(x)) > SINH_LIMIT))
-	{
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_sin(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	}
+        {
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_sin(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        }
 #endif
 #if HAVE_COMPLEX_NUMBERS
       return(c_complex_to_s7(sc, csin(to_c_complex(x))));
@@ -17120,7 +17120,7 @@ static s7_pointer sin_p_p(s7_scheme *sc, s7_pointer x)
     case T_BIG_COMPLEX:
       mpc_sin(sc->mpc_1, big_complex(x), MPC_RNDNN);
       if (mpfr_zero_p(mpc_imagref(sc->mpc_1)))
-	return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
+        return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
       return(mpc_to_number(sc, sc->mpc_1));
 #endif
     default:
@@ -17171,12 +17171,12 @@ static s7_pointer cos_p_p(s7_scheme *sc, s7_pointer x)
       if (integer(x) == 0) return(int_one);             /* (cos 0) -> 1 */
 #if WITH_GMP
       if (integer(x) > SIN_LIMIT)
-	{
-	  mpz_set_si(sc->mpz_1, integer(x));
-	  mpfr_set_z(sc->mpfr_1, sc->mpz_1, MPFR_RNDN);
-	  mpfr_cos(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpz_set_si(sc->mpz_1, integer(x));
+          mpfr_set_z(sc->mpfr_1, sc->mpz_1, MPFR_RNDN);
+          mpfr_cos(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
 #endif
       return(make_real(sc, cos((s7_double)(integer(x)))));
 
@@ -17185,26 +17185,26 @@ static s7_pointer cos_p_p(s7_scheme *sc, s7_pointer x)
 
     case T_REAL: /* if with_gmp */
       {
-	s7_double y = real(x);
+        s7_double y = real(x);
 #if WITH_GMP
-	if (fabs(y) > SIN_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
-	    mpfr_cos(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	    return(mpfr_to_big_real(sc, sc->mpfr_1));
-	  }
-#endif
-	return(make_real(sc, cos(y)));
+        if (fabs(y) > SIN_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
+            mpfr_cos(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+            return(mpfr_to_big_real(sc, sc->mpfr_1));
+          }
+#endif
+        return(make_real(sc, cos(y)));
       }
 
     case T_COMPLEX:
 #if WITH_GMP
       if ((fabs(real_part(x)) > SIN_LIMIT) || (fabs(imag_part(x)) > SINH_LIMIT))
-	{
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_cos(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	}
+        {
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_cos(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        }
 #endif
 #if HAVE_COMPLEX_NUMBERS
       return(c_complex_to_s7(sc, ccos(to_c_complex(x))));
@@ -17227,7 +17227,7 @@ static s7_pointer cos_p_p(s7_scheme *sc, s7_pointer x)
     case T_BIG_COMPLEX:
       mpc_cos(sc->mpc_1, big_complex(x), MPC_RNDNN);
       if (mpfr_zero_p(mpc_imagref(sc->mpc_1)))
-	return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
+        return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
       return(mpc_to_number(sc, sc->mpc_1));
 #endif
     default:
@@ -17272,12 +17272,12 @@ static s7_pointer tan_p_p(s7_scheme *sc, s7_pointer x)
       if (integer(x) == 0) return(int_zero);                      /* (tan 0) -> 0 */
 #if WITH_GMP
       if (integer(x) > TAN_LIMIT)
-	{
-	  mpz_set_si(sc->mpz_1, integer(x));
-	  mpfr_set_z(sc->mpfr_1, sc->mpz_1, MPFR_RNDN);
-	  mpfr_tan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpz_set_si(sc->mpz_1, integer(x));
+          mpfr_set_z(sc->mpfr_1, sc->mpz_1, MPFR_RNDN);
+          mpfr_tan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
 #endif
       return(make_real(sc, tan((s7_double)(integer(x)))));
 
@@ -17287,18 +17287,18 @@ static s7_pointer tan_p_p(s7_scheme *sc, s7_pointer x)
 #if WITH_GMP
     case T_REAL:
       if (fabs(real(x)) > TAN_LIMIT)
-	{
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_tan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_tan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
 #endif
       return(make_real(sc, tan(real(x))));
 
     case T_COMPLEX:
 #if HAVE_COMPLEX_NUMBERS
       if (imag_part(x) > 350.0)
-	return(make_complex_not_0i(sc, 0.0, 1.0));
+        return(make_complex_not_0i(sc, 0.0, 1.0));
       return((imag_part(x) < -350.0) ? make_complex_not_0i(sc, 0.0, -1.0) : c_complex_to_s7(sc, ctan(to_c_complex(x))));
 #else
       out_of_range_error_nr(sc, sc->tan_symbol, int_one, x, no_complex_numbers_string);
@@ -17318,12 +17318,12 @@ static s7_pointer tan_p_p(s7_scheme *sc, s7_pointer x)
       return(mpfr_to_big_real(sc, sc->mpfr_1));
     case T_BIG_COMPLEX:
       if ((MPC_INEX_IM(mpc_cmp_si_si(big_complex(x), 1, 350))) > 0)
-	return(make_complex_not_0i(sc, 0.0, 1.0));
+        return(make_complex_not_0i(sc, 0.0, 1.0));
       if ((MPC_INEX_IM(mpc_cmp_si_si(big_complex(x), 1, -350))) < 0)
-	return(make_complex_not_0i(sc, 0.0, -1.0));
+        return(make_complex_not_0i(sc, 0.0, -1.0));
       mpc_tan(sc->mpc_1, big_complex(x), MPC_RNDNN);
       if (mpfr_zero_p(mpc_imagref(sc->mpc_1)))
-	return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
+        return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
       return(mpc_to_number(sc, sc->mpc_1));
 #endif
     default:
@@ -17373,13 +17373,13 @@ static s7_pointer asin_p_p(s7_scheme *sc, s7_pointer p)
       /* if either real or imag part is very large, use explicit formula, not casin */
       /*   this code taken from sbcl's src/code/irrat.lisp; break is around x+70000000i */
       if ((fabs(real_part(p)) > 1.0e7) ||
-	  (fabs(imag_part(p)) > 1.0e7))
-	{
-	  s7_complex sq1mz, sq1pz, z = to_c_complex(p);
-	  sq1mz = csqrt(1.0 - z);
-	  sq1pz = csqrt(1.0 + z);
-	  return(make_complex(sc, atan(real_part(p) / creal(sq1mz * sq1pz)), asinh(cimag(sq1pz * conj(sq1mz)))));
-	}
+          (fabs(imag_part(p)) > 1.0e7))
+        {
+          s7_complex sq1mz, sq1pz, z = to_c_complex(p);
+          sq1mz = csqrt(1.0 - z);
+          sq1pz = csqrt(1.0 + z);
+          return(make_complex(sc, atan(real_part(p) / creal(sq1mz * sq1pz)), asinh(cimag(sq1pz * conj(sq1mz)))));
+        }
       return(c_complex_to_s7(sc, casin(to_c_complex(p))));
 #else
       out_of_range_error_nr(sc, sc->asin_symbol, int_one, p, no_complex_numbers_string);
@@ -17394,19 +17394,19 @@ static s7_pointer asin_p_p(s7_scheme *sc, s7_pointer p)
       goto ASIN_BIG_REAL;
     case T_BIG_REAL:
       if (mpfr_inf_p(big_real(p)))
-	{
-	  if (mpfr_cmp_ui(big_real(p), 0) < 0)
-	    return(make_complex_not_0i(sc, NAN, INFINITY)); /* match non-bignum choice */
-	  return(make_complex_not_0i(sc, NAN, -INFINITY));
-	}
+        {
+          if (mpfr_cmp_ui(big_real(p), 0) < 0)
+            return(make_complex_not_0i(sc, NAN, INFINITY)); /* match non-bignum choice */
+          return(make_complex_not_0i(sc, NAN, -INFINITY));
+        }
       mpfr_set(sc->mpfr_1, big_real(p), MPFR_RNDN);
     ASIN_BIG_REAL:
       mpfr_set_ui(sc->mpfr_2, 1, MPFR_RNDN);
       if (mpfr_cmpabs(sc->mpfr_1, sc->mpfr_2) <= 0)
-	{
-	  mpfr_asin(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpfr_asin(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
       mpc_set_fr(sc->mpc_1, sc->mpfr_1, MPC_RNDNN);
       mpc_asin(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
       return(mpc_to_number(sc, sc->mpc_1));
@@ -17461,15 +17461,15 @@ static s7_pointer acos_p_p(s7_scheme *sc, s7_pointer p)
       /*   this code taken from sbcl's src/code/irrat.lisp */
 
       if ((fabs(real_part(p)) > 1.0e7) ||
-	  (fabs(imag_part(p)) > 1.0e7))
-	{
-	  s7_complex sq1mz, sq1pz, z = to_c_complex(p);
-	  sq1mz = csqrt(1.0 - z);
-	  sq1pz = csqrt(1.0 + z);	  /* creal(sq1pz) can be 0.0 */
-	  if (creal(sq1pz) == 0.0)        /* so the atan arg will be inf, so the real part will be pi/2(?) */
-	    return(make_complex(sc, M_PI / 2.0, asinh(cimag(sq1mz * conj(sq1pz)))));
-	  return(make_complex(sc, 2.0 * atan(creal(sq1mz) / creal(sq1pz)), asinh(cimag(sq1mz * conj(sq1pz)))));
-	}
+          (fabs(imag_part(p)) > 1.0e7))
+        {
+          s7_complex sq1mz, sq1pz, z = to_c_complex(p);
+          sq1mz = csqrt(1.0 - z);
+          sq1pz = csqrt(1.0 + z);          /* creal(sq1pz) can be 0.0 */
+          if (creal(sq1pz) == 0.0)        /* so the atan arg will be inf, so the real part will be pi/2(?) */
+            return(make_complex(sc, M_PI / 2.0, asinh(cimag(sq1mz * conj(sq1pz)))));
+          return(make_complex(sc, 2.0 * atan(creal(sq1mz) / creal(sq1pz)), asinh(cimag(sq1mz * conj(sq1pz)))));
+        }
       return(c_complex_to_s7(sc, cacos(s7_to_c_complex(p))));
 #else
       out_of_range_error_nr(sc, sc->acos_symbol, int_one, p, no_complex_numbers_string);
@@ -17484,19 +17484,19 @@ static s7_pointer acos_p_p(s7_scheme *sc, s7_pointer p)
       goto ACOS_BIG_REAL;
     case T_BIG_REAL:
       if (mpfr_inf_p(big_real(p)))
-	{
-	  if (mpfr_cmp_ui(big_real(p), 0) < 0)
-	    return(make_complex_not_0i(sc, -NAN, -INFINITY)); /* match non-bignum choice */
-	  return(make_complex_not_0i(sc, -NAN, INFINITY));
-	}
+        {
+          if (mpfr_cmp_ui(big_real(p), 0) < 0)
+            return(make_complex_not_0i(sc, -NAN, -INFINITY)); /* match non-bignum choice */
+          return(make_complex_not_0i(sc, -NAN, INFINITY));
+        }
       mpfr_set(sc->mpfr_1, big_real(p), MPFR_RNDN);
     ACOS_BIG_REAL:
       mpfr_set_ui(sc->mpfr_2, 1, MPFR_RNDN);
       if (mpfr_cmpabs(sc->mpfr_1, sc->mpfr_2) <= 0)
-	{
-	  mpfr_acos(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpfr_acos(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
       mpc_set_fr(sc->mpc_1, sc->mpfr_1, MPC_RNDNN);
       mpc_acos(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
       return(mpc_to_number(sc, sc->mpc_1));
@@ -17530,47 +17530,47 @@ static s7_pointer g_atan(s7_scheme *sc, s7_pointer args)
   if (!is_pair(cdr(args)))
     {
       switch (type(x))
-	{
-	case T_INTEGER:  return((integer(x) == 0) ? int_zero : make_real(sc, atan((double)integer(x))));
-	case T_RATIO:    return(make_real(sc, atan(fraction(x))));
-	case T_REAL:     return(make_real(sc, atan(real(x))));
+        {
+        case T_INTEGER:  return((integer(x) == 0) ? int_zero : make_real(sc, atan((double)integer(x))));
+        case T_RATIO:    return(make_real(sc, atan(fraction(x))));
+        case T_REAL:     return(make_real(sc, atan(real(x))));
 
-	case T_COMPLEX:
+        case T_COMPLEX:
 #if HAVE_COMPLEX_NUMBERS
-	  return(c_complex_to_s7(sc, catan(to_c_complex(x))));
+          return(c_complex_to_s7(sc, catan(to_c_complex(x))));
 #else
-	  out_of_range_error_nr(sc, sc->atan_symbol, int_one, x, no_complex_numbers_string);
+          out_of_range_error_nr(sc, sc->atan_symbol, int_one, x, no_complex_numbers_string);
 #endif
 
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  mpfr_atan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  mpfr_atan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  mpfr_atan(sc->mpfr_1, big_real(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_atan(sc->mpc_1, big_complex(x), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_p(sc, x, sc->atan_symbol, a_number_string));
-	}}
+        case T_BIG_INTEGER:
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          mpfr_atan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          mpfr_atan(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          mpfr_atan(sc->mpfr_1, big_real(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_atan(sc->mpc_1, big_complex(x), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_p(sc, x, sc->atan_symbol, a_number_string));
+        }}
 
   y = cadr(args);
   switch (type(x))
     {
     case T_INTEGER: case T_RATIO: case T_REAL:
       if (is_small_real(y))
-	return(make_real(sc, atan2(s7_real(x), s7_real(y))));
+        return(make_real(sc, atan2(s7_real(x), s7_real(y))));
 #if WITH_GMP
       if (!is_real(y))
-	return(method_or_bust(sc, y, sc->atan_symbol, args, sc->type_names[T_REAL], 2));
+        return(method_or_bust(sc, y, sc->atan_symbol, args, sc->type_names[T_REAL], 2));
       mpfr_set_d(sc->mpfr_1, s7_real(x), MPFR_RNDN);
       goto ATAN2_BIG_REAL;
     case T_BIG_INTEGER:
@@ -17595,11 +17595,11 @@ static s7_pointer g_atan(s7_scheme *sc, s7_pointer args)
       mpfr_set(sc->mpfr_2, big_real(y), MPFR_RNDN);
     else
       if (is_t_big_integer(y))
-	mpfr_set_z(sc->mpfr_2, big_integer(y), MPFR_RNDN);
+        mpfr_set_z(sc->mpfr_2, big_integer(y), MPFR_RNDN);
       else
-	if (is_t_big_ratio(y))
-	  mpfr_set_q(sc->mpfr_2, big_ratio(y), MPFR_RNDN);
-	else return(method_or_bust(sc, y, sc->atan_symbol, args, sc->type_names[T_REAL], 2));
+        if (is_t_big_ratio(y))
+          mpfr_set_q(sc->mpfr_2, big_ratio(y), MPFR_RNDN);
+        else return(method_or_bust(sc, y, sc->atan_symbol, args, sc->type_names[T_REAL], 2));
   mpfr_atan2(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
   return(mpfr_to_big_real(sc, sc->mpfr_1));
 #endif
@@ -17619,26 +17619,26 @@ static s7_pointer sinh_p_p(s7_scheme *sc, s7_pointer x)
     case T_REAL:
     case T_RATIO:
       {
-	s7_double y = s7_real(x);
+        s7_double y = s7_real(x);
 #if WITH_GMP
-	if (fabs(y) > SINH_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
-	    mpfr_sinh(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	    return(mpfr_to_big_real(sc, sc->mpfr_1));
-	  }
-#endif
-	return(make_real(sc, sinh(y)));
+        if (fabs(y) > SINH_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
+            mpfr_sinh(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+            return(mpfr_to_big_real(sc, sc->mpfr_1));
+          }
+#endif
+        return(make_real(sc, sinh(y)));
       }
 
     case T_COMPLEX:
 #if WITH_GMP
       if ((fabs(real_part(x)) > SINH_LIMIT) || (fabs(imag_part(x)) > SINH_LIMIT))
-	{
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_sinh(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	}
+        {
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_sinh(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        }
 #endif
 #if HAVE_COMPLEX_NUMBERS
       return(c_complex_to_s7(sc, csinh(to_c_complex(x))));
@@ -17661,7 +17661,7 @@ static s7_pointer sinh_p_p(s7_scheme *sc, s7_pointer x)
     case T_BIG_COMPLEX:
       mpc_sinh(sc->mpc_1, big_complex(x), MPC_RNDNN);
       if (mpfr_zero_p(mpc_imagref(sc->mpc_1)))
-	return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
+        return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
       return(mpc_to_number(sc, sc->mpc_1));
 #endif
     default:
@@ -17692,26 +17692,26 @@ static s7_pointer cosh_p_p(s7_scheme *sc, s7_pointer x)
     case T_REAL:
     case T_RATIO:
       {
-	s7_double y = s7_real(x);
+        s7_double y = s7_real(x);
 #if WITH_GMP
-	if (fabs(y) > SINH_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
-	    mpfr_cosh(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	    return(mpfr_to_big_real(sc, sc->mpfr_1));
-	  }
-#endif
-	return(make_real(sc, cosh(y)));
+        if (fabs(y) > SINH_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, y, MPFR_RNDN);
+            mpfr_cosh(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+            return(mpfr_to_big_real(sc, sc->mpfr_1));
+          }
+#endif
+        return(make_real(sc, cosh(y)));
       }
 
     case T_COMPLEX:
 #if WITH_GMP
       if ((fabs(real_part(x)) > SINH_LIMIT) || (fabs(imag_part(x)) > SINH_LIMIT))
-	{
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_cosh(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	}
+        {
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_cosh(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        }
 #endif
 #if HAVE_COMPLEX_NUMBERS
       return(c_complex_to_s7(sc, ccosh(to_c_complex(x))));
@@ -17734,7 +17734,7 @@ static s7_pointer cosh_p_p(s7_scheme *sc, s7_pointer x)
     case T_BIG_COMPLEX:
       mpc_cosh(sc->mpc_1, big_complex(x), MPC_RNDNN);
       if (mpfr_zero_p(mpc_imagref(sc->mpc_1)))
-	return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
+        return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
       return(mpc_to_number(sc, sc->mpc_1));
 #endif
     default:
@@ -17766,9 +17766,9 @@ static s7_pointer tanh_p_p(s7_scheme *sc, s7_pointer x)
     case T_COMPLEX:
 #if HAVE_COMPLEX_NUMBERS
       if (real_part(x) > TANH_LIMIT)
-	return(real_one);                         /* closer than 0.0 which is what ctanh is about to return! */
+        return(real_one);                         /* closer than 0.0 which is what ctanh is about to return! */
       if (real_part(x) < -TANH_LIMIT)
-	return(make_real(sc, -1.0));              /* closer than ctanh's -0.0 */
+        return(make_real(sc, -1.0));              /* closer than ctanh's -0.0 */
       return(c_complex_to_s7(sc, ctanh(to_c_complex(x))));
 #else
       out_of_range_error_nr(sc, sc->tanh_symbol, int_one, x, no_complex_numbers_string);
@@ -17791,19 +17791,19 @@ static s7_pointer tanh_p_p(s7_scheme *sc, s7_pointer x)
       return(mpfr_to_big_real(sc, sc->mpfr_1));
     case T_BIG_COMPLEX:
       if ((MPC_INEX_RE(mpc_cmp_si_si(big_complex(x), TANH_LIMIT, 1))) > 0)
-	return(real_one);
+        return(real_one);
       if ((MPC_INEX_RE(mpc_cmp_si_si(big_complex(x), -TANH_LIMIT, 1))) < 0)
-	return(make_real(sc, -1.0));
+        return(make_real(sc, -1.0));
       if ((mpfr_nan_p(mpc_imagref(big_complex(x)))) ||
-	  (mpfr_inf_p(mpc_imagref(big_complex(x)))))
-	{
-	  if (mpfr_cmp_ui(mpc_realref(big_complex(x)), 0) == 0)
-	    return(make_complex_not_0i(sc, 0.0, NAN)); /* match non-bignum choice */
-	  return(complex_NaN);
-	}
+          (mpfr_inf_p(mpc_imagref(big_complex(x)))))
+        {
+          if (mpfr_cmp_ui(mpc_realref(big_complex(x)), 0) == 0)
+            return(make_complex_not_0i(sc, 0.0, NAN)); /* match non-bignum choice */
+          return(complex_NaN);
+        }
       mpc_tanh(sc->mpc_1, big_complex(x), MPC_RNDNN);
       if (mpfr_zero_p(mpc_imagref(sc->mpc_1)))
-	return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
+        return(mpfr_to_big_real(sc, mpc_realref(sc->mpc_1)));
       return(mpc_to_number(sc, sc->mpc_1));
 #endif
     default:
@@ -17879,9 +17879,9 @@ static s7_pointer acosh_p_p(s7_scheme *sc, s7_pointer x)
     case T_REAL:
     case T_RATIO:
       {
-	s7_double x1 = s7_real(x);
-	if (x1 >= 1.0)
-	  return(make_real(sc, acosh(x1)));
+        s7_double x1 = s7_real(x);
+        if (x1 >= 1.0)
+          return(make_real(sc, acosh(x1)));
       }
     case T_COMPLEX:
 #if HAVE_COMPLEX_NUMBERS
@@ -17935,9 +17935,9 @@ static s7_pointer atanh_p_p(s7_scheme *sc, s7_pointer x)
     case T_REAL:
     case T_RATIO:
       {
-	s7_double x1 = s7_real(x);
-	if (fabs(x1) < 1.0)
-	  return(make_real(sc, atanh(x1)));
+        s7_double x1 = s7_real(x);
+        if (fabs(x1) < 1.0)
+          return(make_real(sc, atanh(x1)));
       }
       /* if we can't distinguish x from 1.0 even with long_doubles, we'll get inf.0:
        *    (atanh 9223372036854775/9223372036854776) -> 18.714973875119
@@ -17968,10 +17968,10 @@ static s7_pointer atanh_p_p(s7_scheme *sc, s7_pointer x)
     ATANH_BIG_REAL:
       mpfr_set_ui(sc->mpfr_1, 1, MPFR_RNDN);
       if (mpfr_cmpabs(sc->mpfr_2, sc->mpfr_1) < 0)
-	{
-	  mpfr_atanh(sc->mpfr_2, sc->mpfr_2, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_2));
-	}
+        {
+          mpfr_atanh(sc->mpfr_2, sc->mpfr_2, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_2));
+        }
       mpc_set_fr(sc->mpc_1, sc->mpfr_2, MPC_RNDNN);
       mpc_atanh(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
       return(mpc_to_number(sc, sc->mpc_1));
@@ -17999,54 +17999,54 @@ static s7_pointer sqrt_p_p(s7_scheme *sc, s7_pointer p)
     {
     case T_INTEGER:
       {
-	s7_double sqx;
-	if (integer(p) >= 0)
-	  {
-	    s7_int ix;
+        s7_double sqx;
+        if (integer(p) >= 0)
+          {
+            s7_int ix;
 #if WITH_GMP
-	    mpz_set_si(sc->mpz_1, integer(p));
-	    mpz_sqrtrem(sc->mpz_1, sc->mpz_2, sc->mpz_1);
-	    if (mpz_cmp_ui(sc->mpz_2, 0) == 0)
-	      return(make_integer(sc, mpz_get_si(sc->mpz_1)));
-	    mpfr_set_si(sc->mpfr_1, integer(p), MPFR_RNDN);
-	    mpfr_sqrt(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	    return(mpfr_to_big_real(sc, sc->mpfr_1));
-#endif
-	    sqx = sqrt((s7_double)integer(p));
-	    ix = (s7_int)sqx;
-	    return(((ix * ix) == integer(p)) ? make_integer(sc, ix) : make_real(sc, sqx));
-	    /* Mark Weaver notes that (zero? (- (sqrt 9007199136250226) 94906265.0)) -> #t
-	     * but (* 94906265 94906265) -> 9007199136250225 -- oops
-	     * if we use bigfloats, we're ok:
-	     *    (* (sqrt 9007199136250226.0) (sqrt 9007199136250226.0)) -> 9.007199136250226000000000000000000000026E15
-	     * at least we return a real here, not an incorrect integer and (sqrt 9007199136250225) -> 94906265
-	     */
-	  }
+            mpz_set_si(sc->mpz_1, integer(p));
+            mpz_sqrtrem(sc->mpz_1, sc->mpz_2, sc->mpz_1);
+            if (mpz_cmp_ui(sc->mpz_2, 0) == 0)
+              return(make_integer(sc, mpz_get_si(sc->mpz_1)));
+            mpfr_set_si(sc->mpfr_1, integer(p), MPFR_RNDN);
+            mpfr_sqrt(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+            return(mpfr_to_big_real(sc, sc->mpfr_1));
+#endif
+            sqx = sqrt((s7_double)integer(p));
+            ix = (s7_int)sqx;
+            return(((ix * ix) == integer(p)) ? make_integer(sc, ix) : make_real(sc, sqx));
+            /* Mark Weaver notes that (zero? (- (sqrt 9007199136250226) 94906265.0)) -> #t
+             * but (* 94906265 94906265) -> 9007199136250225 -- oops
+             * if we use bigfloats, we're ok:
+             *    (* (sqrt 9007199136250226.0) (sqrt 9007199136250226.0)) -> 9.007199136250226000000000000000000000026E15
+             * at least we return a real here, not an incorrect integer and (sqrt 9007199136250225) -> 94906265
+             */
+          }
 #if HAVE_COMPLEX_NUMBERS
 #if WITH_GMP
-	mpc_set_si(sc->mpc_1, integer(p), MPC_RNDNN);
-	mpc_sqrt(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
-	return(mpc_to_number(sc, sc->mpc_1));
+        mpc_set_si(sc->mpc_1, integer(p), MPC_RNDNN);
+        mpc_sqrt(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
+        return(mpc_to_number(sc, sc->mpc_1));
 #endif
-	sqx = (s7_double)integer(p); /* we're trying to protect against (sqrt -9223372036854775808) where we can't negate the integer argument */
-	return(make_complex_not_0i(sc, 0.0, sqrt((s7_double)(-sqx))));
+        sqx = (s7_double)integer(p); /* we're trying to protect against (sqrt -9223372036854775808) where we can't negate the integer argument */
+        return(make_complex_not_0i(sc, 0.0, sqrt((s7_double)(-sqx))));
 #else
-	out_of_range_error_nr(sc, sc->sqrt_symbol, int_one, p, no_complex_numbers_string);
+        out_of_range_error_nr(sc, sc->sqrt_symbol, int_one, p, no_complex_numbers_string);
 #endif
       }
 
     case T_RATIO:
       if (numerator(p) > 0) /* else it's complex, so it can't be a ratio */
-	{
-	  s7_int nm = (s7_int)sqrt(numerator(p));
-	  if (nm * nm == numerator(p))
-	    {
-	      s7_int dn = (s7_int)sqrt(denominator(p));
-	      if (dn * dn == denominator(p))
-		return(make_ratio(sc, nm, dn));
-	    }
-	  return(make_real(sc, sqrt((s7_double)fraction(p))));
-	}
+        {
+          s7_int nm = (s7_int)sqrt(numerator(p));
+          if (nm * nm == numerator(p))
+            {
+              s7_int dn = (s7_int)sqrt(denominator(p));
+              if (dn * dn == denominator(p))
+                return(make_ratio(sc, nm, dn));
+            }
+          return(make_real(sc, sqrt((s7_double)fraction(p))));
+        }
 #if HAVE_COMPLEX_NUMBERS
       return(make_complex(sc, 0.0, sqrt((s7_double)(-fraction(p)))));
 #else
@@ -18056,7 +18056,7 @@ static s7_pointer sqrt_p_p(s7_scheme *sc, s7_pointer p)
     case T_REAL:
       if (is_NaN(real(p))) return(p);
       if (real(p) >= 0.0)
-	return(make_real(sc, sqrt(real(p))));
+        return(make_real(sc, sqrt(real(p))));
       return(make_complex_not_0i(sc, 0.0, sqrt(-real(p))));
 
     case T_COMPLEX:    /* (* inf.0 (sqrt -1)) -> -nan+infi, but (sqrt -inf.0) -> 0+infi */
@@ -18069,46 +18069,46 @@ static s7_pointer sqrt_p_p(s7_scheme *sc, s7_pointer p)
 #if WITH_GMP
     case T_BIG_INTEGER:
       if (mpz_cmp_ui(big_integer(p), 0) >= 0)
-	{
-	  mpz_sqrtrem(sc->mpz_1, sc->mpz_2, big_integer(p));
-	  if (mpz_cmp_ui(sc->mpz_2, 0) == 0)
-	    return(mpz_to_integer(sc, sc->mpz_1));
-	  mpfr_set_z(sc->mpfr_1, big_integer(p), MPFR_RNDN);
-	  mpfr_sqrt(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpz_sqrtrem(sc->mpz_1, sc->mpz_2, big_integer(p));
+          if (mpz_cmp_ui(sc->mpz_2, 0) == 0)
+            return(mpz_to_integer(sc, sc->mpz_1));
+          mpfr_set_z(sc->mpfr_1, big_integer(p), MPFR_RNDN);
+          mpfr_sqrt(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
       mpc_set_z(sc->mpc_1, big_integer(p), MPC_RNDNN);
       mpc_sqrt(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
       return(mpc_to_number(sc, sc->mpc_1));
 
     case T_BIG_RATIO: /* if big ratio, check both num and den for squares */
       if (mpq_cmp_ui(big_ratio(p), 0, 1) < 0)
-	{
-	  mpc_set_q(sc->mpc_1, big_ratio(p), MPC_RNDNN);
-	  mpc_sqrt(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	}
+        {
+          mpc_set_q(sc->mpc_1, big_ratio(p), MPC_RNDNN);
+          mpc_sqrt(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        }
       mpz_sqrtrem(sc->mpz_1, sc->mpz_2, mpq_numref(big_ratio(p)));
       if (mpz_cmp_ui(sc->mpz_2, 0) == 0)
-	{
-	  mpz_sqrtrem(sc->mpz_3, sc->mpz_2, mpq_denref(big_ratio(p)));
-	  if (mpz_cmp_ui(sc->mpz_2, 0) == 0)
-	    {
-	      mpq_set_num(sc->mpq_1, sc->mpz_1);
-	      mpq_set_den(sc->mpq_1, sc->mpz_3);
-	      return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	    }}
+        {
+          mpz_sqrtrem(sc->mpz_3, sc->mpz_2, mpq_denref(big_ratio(p)));
+          if (mpz_cmp_ui(sc->mpz_2, 0) == 0)
+            {
+              mpq_set_num(sc->mpq_1, sc->mpz_1);
+              mpq_set_den(sc->mpq_1, sc->mpz_3);
+              return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+            }}
       mpfr_set_q(sc->mpfr_1, big_ratio(p), MPFR_RNDN);
       mpfr_sqrt(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
       return(mpfr_to_big_real(sc, sc->mpfr_1));
 
     case T_BIG_REAL:
       if (mpfr_cmp_ui(big_real(p), 0) < 0)
-	{
-	  mpc_set_fr(sc->mpc_1, big_real(p), MPC_RNDNN);
-	  mpc_sqrt(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	}
+        {
+          mpc_set_fr(sc->mpc_1, big_real(p), MPC_RNDNN);
+          mpc_sqrt(sc->mpc_1, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        }
       mpfr_sqrt(sc->mpfr_1, big_real(p), MPFR_RNDN);
       return(mpfr_to_big_real(sc, sc->mpfr_1));
 
@@ -18172,19 +18172,19 @@ static s7_pointer big_expt(s7_scheme *sc, s7_pointer args)
   if (is_zero(x))
     {
       if ((s7_is_integer(x)) && (s7_is_integer(y)) && (is_zero(y)))
-	return(int_one);
+        return(int_one);
 
       if (is_real(y))
-	{
-	  if (is_negative(sc, y))
-	    division_by_zero_error_2_nr(sc, sc->expt_symbol, x, y);
-	}
+        {
+          if (is_negative(sc, y))
+            division_by_zero_error_2_nr(sc, sc->expt_symbol, x, y);
+        }
       else
-	if (s7_real_part(y) < 0.0)
-	  division_by_zero_error_2_nr(sc, sc->expt_symbol, x, y);
+        if (s7_real_part(y) < 0.0)
+          division_by_zero_error_2_nr(sc, sc->expt_symbol, x, y);
 
       if ((is_rational(x)) && (is_rational(y)))
-	return(int_zero);
+        return(int_zero);
       return(real_zero);
     }
 
@@ -18192,92 +18192,92 @@ static s7_pointer big_expt(s7_scheme *sc, s7_pointer args)
     {
       s7_int yval = s7_integer_clamped_if_gmp(sc, y);
       if (yval == 0)
-	return((is_rational(x)) ? int_one : real_one);
+        return((is_rational(x)) ? int_one : real_one);
 
       if (yval == 1)
-	return(x);
+        return(x);
 
       if ((!is_big_number(x)) &&
-	  ((is_one(x)) || (is_zero(x))))
-	return(x);
+          ((is_one(x)) || (is_zero(x))))
+        return(x);
 
       if ((yval < S7_INT32_MAX) &&
-	  (yval > S7_INT32_MIN))
-	{
-	  /* (protect against gmp exception if for example (expt 1/9223372036854775807 -9223372036854775807) */
-	  if (s7_is_integer(x))
-	    {
-	      if (is_t_big_integer(x))
-		mpz_set(sc->mpz_2, big_integer(x));
-	      else mpz_set_si(sc->mpz_2, integer(x));
-	      if (yval >= 0)
-		{
-		  mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)yval);
-		  return(mpz_to_integer(sc, sc->mpz_2));
-		}
-	      mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)(-yval));
-	      mpq_set_z(sc->mpq_1, sc->mpz_2);
-	      mpq_inv(sc->mpq_1, sc->mpq_1);
-	      if (mpz_cmp_ui(mpq_denref(sc->mpq_1), 1) == 0)
-		return(mpz_to_integer(sc, mpq_numref(sc->mpq_1)));
-	      return(mpq_to_big_ratio(sc, sc->mpq_1));
-	    }
-
-	  if (s7_is_ratio(x)) /* here y is an integer */
-	    {
-	      if (is_t_big_ratio(x))
-		{
-		  mpz_set(sc->mpz_1, mpq_numref(big_ratio(x)));
-		  mpz_set(sc->mpz_2, mpq_denref(big_ratio(x)));
-		}
-	      else
-		{
-		  mpz_set_si(sc->mpz_1, numerator(x));
-		  mpz_set_si(sc->mpz_2, denominator(x));
-		}
-	      if (yval >= 0)
-		{
-		  mpz_pow_ui(sc->mpz_1, sc->mpz_1, (uint32_t)yval);
-		  mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)yval);
-		  mpq_set_num(sc->mpq_1, sc->mpz_1);
-		  mpq_set_den(sc->mpq_1, sc->mpz_2);
-		}
-	      else
-		{
-		  yval = -yval;
-		  mpz_pow_ui(sc->mpz_1, sc->mpz_1, (uint32_t)yval);
-		  mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)yval);
-		  mpq_set_num(sc->mpq_1, sc->mpz_2);
-		  mpq_set_den(sc->mpq_1, sc->mpz_1);
-		  mpq_canonicalize(sc->mpq_1);
-		}
-	      if (mpz_cmp_ui(mpq_denref(sc->mpq_1), 1) == 0)
-		return(mpz_to_integer(sc, mpq_numref(sc->mpq_1)));
-	      return(mpq_to_big_ratio(sc, sc->mpq_1));
-	    }
-
-	  if (is_real(x))
-	    {
-	      if (is_t_big_real(x))
-		mpfr_set(sc->mpfr_1, big_real(x), MPFR_RNDN);
-	      else mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	      mpfr_pow_si(sc->mpfr_1, sc->mpfr_1, yval, MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }}}
+          (yval > S7_INT32_MIN))
+        {
+          /* (protect against gmp exception if for example (expt 1/9223372036854775807 -9223372036854775807) */
+          if (s7_is_integer(x))
+            {
+              if (is_t_big_integer(x))
+                mpz_set(sc->mpz_2, big_integer(x));
+              else mpz_set_si(sc->mpz_2, integer(x));
+              if (yval >= 0)
+                {
+                  mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)yval);
+                  return(mpz_to_integer(sc, sc->mpz_2));
+                }
+              mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)(-yval));
+              mpq_set_z(sc->mpq_1, sc->mpz_2);
+              mpq_inv(sc->mpq_1, sc->mpq_1);
+              if (mpz_cmp_ui(mpq_denref(sc->mpq_1), 1) == 0)
+                return(mpz_to_integer(sc, mpq_numref(sc->mpq_1)));
+              return(mpq_to_big_ratio(sc, sc->mpq_1));
+            }
+
+          if (s7_is_ratio(x)) /* here y is an integer */
+            {
+              if (is_t_big_ratio(x))
+                {
+                  mpz_set(sc->mpz_1, mpq_numref(big_ratio(x)));
+                  mpz_set(sc->mpz_2, mpq_denref(big_ratio(x)));
+                }
+              else
+                {
+                  mpz_set_si(sc->mpz_1, numerator(x));
+                  mpz_set_si(sc->mpz_2, denominator(x));
+                }
+              if (yval >= 0)
+                {
+                  mpz_pow_ui(sc->mpz_1, sc->mpz_1, (uint32_t)yval);
+                  mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)yval);
+                  mpq_set_num(sc->mpq_1, sc->mpz_1);
+                  mpq_set_den(sc->mpq_1, sc->mpz_2);
+                }
+              else
+                {
+                  yval = -yval;
+                  mpz_pow_ui(sc->mpz_1, sc->mpz_1, (uint32_t)yval);
+                  mpz_pow_ui(sc->mpz_2, sc->mpz_2, (uint32_t)yval);
+                  mpq_set_num(sc->mpq_1, sc->mpz_2);
+                  mpq_set_den(sc->mpq_1, sc->mpz_1);
+                  mpq_canonicalize(sc->mpq_1);
+                }
+              if (mpz_cmp_ui(mpq_denref(sc->mpq_1), 1) == 0)
+                return(mpz_to_integer(sc, mpq_numref(sc->mpq_1)));
+              return(mpq_to_big_ratio(sc, sc->mpq_1));
+            }
+
+          if (is_real(x))
+            {
+              if (is_t_big_real(x))
+                mpfr_set(sc->mpfr_1, big_real(x), MPFR_RNDN);
+              else mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+              mpfr_pow_si(sc->mpfr_1, sc->mpfr_1, yval, MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }}}
 
   if ((is_t_ratio(y)) &&              /* not s7_is_ratio which accepts bignums */
       (numerator(y) == 1))
     {
       if (denominator(y) == 2)
-	return(sqrt_p_p(sc, x));
+        return(sqrt_p_p(sc, x));
 
       if ((is_real(x)) &&
-	  (denominator(y) == 3))
-	{
-	  any_real_to_mpfr(sc, x, sc->mpfr_1);
-	  mpfr_cbrt(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}}
+          (denominator(y) == 3))
+        {
+          any_real_to_mpfr(sc, x, sc->mpfr_1);
+          mpfr_cbrt(sc->mpfr_1, sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }}
 
   res = any_number_to_mpc(sc, y, sc->mpc_2);
   if (res == real_infinity)
@@ -18285,18 +18285,18 @@ static s7_pointer big_expt(s7_scheme *sc, s7_pointer args)
       if (is_one(x)) return(int_one);
       if (!is_real(x)) return((is_negative(sc, y)) ? real_zero : complex_NaN);
       if (is_zero(x))
-	{
-	  if (is_negative(sc, y)) division_by_zero_error_2_nr(sc, sc->expt_symbol, x, y);
-	  return(real_zero);
-	}
+        {
+          if (is_negative(sc, y)) division_by_zero_error_2_nr(sc, sc->expt_symbol, x, y);
+          return(real_zero);
+        }
       if (lt_b_pi(sc, x, 0))
-	{
-	  if (lt_b_pi(sc, x, -1))
-	    return((is_positive(sc, y)) ? real_infinity : real_zero);
-	  return((is_positive(sc, y)) ? real_zero : real_infinity);
-	}
+        {
+          if (lt_b_pi(sc, x, -1))
+            return((is_positive(sc, y)) ? real_infinity : real_zero);
+          return((is_positive(sc, y)) ? real_zero : real_infinity);
+        }
       if (lt_b_pi(sc, x, 1))
-	return((is_positive(sc, y)) ? real_zero : real_infinity);
+        return((is_positive(sc, y)) ? real_zero : real_infinity);
       return((is_positive(sc, y)) ? real_infinity : real_zero);
     }
   if (res) return(complex_NaN);
@@ -18307,14 +18307,14 @@ static s7_pointer big_expt(s7_scheme *sc, s7_pointer args)
     {
       res = any_real_to_mpfr(sc, x, sc->mpfr_1);
       if (res)
-	{
-	  if (res == real_infinity)
-	    {
-	      if (is_negative(sc, y)) return(real_zero);
-	      return((is_zero(y)) ? real_one : real_infinity);
-	    }
-	  return(complex_NaN);
-	}
+        {
+          if (res == real_infinity)
+            {
+              if (is_negative(sc, y)) return(real_zero);
+              return((is_zero(y)) ? real_one : real_infinity);
+            }
+          return(complex_NaN);
+        }
       mpfr_pow(sc->mpfr_1, sc->mpfr_1, mpc_realref(sc->mpc_2), MPFR_RNDN);
       return(mpfr_to_big_real(sc, sc->mpfr_1));
     }
@@ -18323,10 +18323,10 @@ static s7_pointer big_expt(s7_scheme *sc, s7_pointer args)
   if (res)
     {
       if ((res == real_infinity) && (is_real(y)))
-	{
-	  if (is_negative(sc, y)) return(real_zero);
-	  return((is_zero(y)) ? real_one : real_infinity);
-	}
+        {
+          if (is_negative(sc, y)) return(real_zero);
+          return((is_zero(y)) ? real_one : real_infinity);
+        }
       return(complex_NaN);
     }
   if (mpc_cmp_si_si(sc->mpc_1, 0, 0) == 0)
@@ -18339,17 +18339,17 @@ static s7_pointer big_expt(s7_scheme *sc, s7_pointer args)
   if ((!mpfr_nan_p(mpc_imagref(sc->mpc_1))) && (mpfr_cmp_ui(mpc_imagref(sc->mpc_1), 0) == 0)) /* (expt -inf.0 1/3) -> +inf.0+nan.0i in mpc */
     {
       if ((is_rational(car(args))) &&
-	  (is_rational(cadr(args))) &&
-	  (mpfr_integer_p(mpc_realref(sc->mpc_1)) != 0))
-	{
-	  /* mpfr_integer_p can be confused: (expt 2718/1000 (bignum 617/5)) returns an int32_t if precision=128, float if 512 */
-	  /*   so first make sure we're within (say) 31 bits */
-	  mpfr_set_ui(sc->mpfr_1, S7_INT32_MAX, MPFR_RNDN);
-	  if (mpfr_cmpabs(mpc_realref(sc->mpc_1), sc->mpfr_1) < 0)
-	    {
-	      mpfr_get_z(sc->mpz_1, mpc_realref(sc->mpc_1), MPFR_RNDN);
-	      return(mpz_to_integer(sc, sc->mpz_1));
-	    }}
+          (is_rational(cadr(args))) &&
+          (mpfr_integer_p(mpc_realref(sc->mpc_1)) != 0))
+        {
+          /* mpfr_integer_p can be confused: (expt 2718/1000 (bignum 617/5)) returns an int32_t if precision=128, float if 512 */
+          /*   so first make sure we're within (say) 31 bits */
+          mpfr_set_ui(sc->mpfr_1, S7_INT32_MAX, MPFR_RNDN);
+          if (mpfr_cmpabs(mpc_realref(sc->mpc_1), sc->mpfr_1) < 0)
+            {
+              mpfr_get_z(sc->mpz_1, mpc_realref(sc->mpc_1), MPFR_RNDN);
+              return(mpz_to_integer(sc, sc->mpz_1));
+            }}
       mpfr_set(sc->mpfr_1, mpc_realref(sc->mpc_1), MPFR_RNDN);
       return(mpfr_to_big_real(sc, sc->mpfr_1));
     }
@@ -18367,136 +18367,136 @@ static s7_pointer expt_p_pp(s7_scheme *sc, s7_pointer n, s7_pointer pw)
   if (is_zero(n))
     {
       if (is_zero(pw))
-	{
-	  if ((s7_is_integer(n)) && (s7_is_integer(pw)))       /* (expt 0 0) -> 1 */
-	    return(int_one);
-	  return(real_zero);                                   /* (expt 0.0 0) -> 0.0 */
-	}
+        {
+          if ((s7_is_integer(n)) && (s7_is_integer(pw)))       /* (expt 0 0) -> 1 */
+            return(int_one);
+          return(real_zero);                                   /* (expt 0.0 0) -> 0.0 */
+        }
       if (is_real(pw))
-	{
-	  if (is_negative(sc, pw))                              /* (expt 0 -1) */
-	    division_by_zero_error_2_nr(sc, sc->expt_symbol, n, pw);
-	  /* (Clisp gives divide-by-zero error here, Guile returns inf.0) */
-
-	  if (is_NaN(s7_real(pw)))                             /* (expt 0 +nan.0) */
-	    return(pw);
-	}
+        {
+          if (is_negative(sc, pw))                              /* (expt 0 -1) */
+            division_by_zero_error_2_nr(sc, sc->expt_symbol, n, pw);
+          /* (Clisp gives divide-by-zero error here, Guile returns inf.0) */
+
+          if (is_NaN(s7_real(pw)))                             /* (expt 0 +nan.0) */
+            return(pw);
+        }
       else
-	{                                                      /* (expt 0 a+bi) */
-	  if (real_part(pw) < 0.0)                             /* (expt 0 -1+i) */
-	    division_by_zero_error_2_nr(sc, sc->expt_symbol, n, pw);
-	  if ((is_NaN(real_part(pw))) ||                       /* (expt 0 0+1/0i) */
-	      (is_NaN(imag_part(pw))))
-	    return(pw);
-	}
+        {                                                      /* (expt 0 a+bi) */
+          if (real_part(pw) < 0.0)                             /* (expt 0 -1+i) */
+            division_by_zero_error_2_nr(sc, sc->expt_symbol, n, pw);
+          if ((is_NaN(real_part(pw))) ||                       /* (expt 0 0+1/0i) */
+              (is_NaN(imag_part(pw))))
+            return(pw);
+        }
       if ((s7_is_integer(n)) && (s7_is_integer(pw)))           /* pw != 0, (expt 0 2312) */
-	return(int_zero);
+        return(int_zero);
       return(real_zero);                                       /* (expt 0.0 123123) */
     }
 
   if (is_one(pw))
     {
       if (s7_is_integer(pw))                                   /* (expt x 1) */
-	return(n);
+        return(n);
       if (is_rational(n))                                      /* (expt ratio 1.0) */
-	return(make_real(sc, rational_to_double(sc, n)));
+        return(make_real(sc, rational_to_double(sc, n)));
       return(n);
     }
   if (is_t_integer(pw))
     {
       s7_int y = integer(pw);
       if (y == 0)
-	{
-	  if (is_rational(n))                                 /* (expt 3 0) */
-	    return(int_one);
-	  if ((is_NaN(s7_real_part(n))) ||                    /* (expt 1/0 0) -> NaN */
-	      (is_NaN(s7_imag_part(n))))                      /* (expt (complex 0 1/0) 0) -> NaN */
-	    return(n);
-	  return(real_one);                                   /* (expt 3.0 0) */
-	}
+        {
+          if (is_rational(n))                                 /* (expt 3 0) */
+            return(int_one);
+          if ((is_NaN(s7_real_part(n))) ||                    /* (expt 1/0 0) -> NaN */
+              (is_NaN(s7_imag_part(n))))                      /* (expt (complex 0 1/0) 0) -> NaN */
+            return(n);
+          return(real_one);                                   /* (expt 3.0 0) */
+        }
       switch (type(n))
-	{
-	case T_INTEGER:
-	  {
-	    s7_int x = integer(n);
-	    if (x == 1)                                       /* (expt 1 y) */
-	      return(n);
-
-	    if (x == -1)
-	      {
-		if (y == S7_INT64_MIN)                        /* (expt -1 most-negative-fixnum) */
-		  return(int_one);
-		if (s7_int_abs(y) & 1)                        /* (expt -1 odd-int) */
-		  return(n);
-		return(int_one);                              /* (expt -1 even-int) */
-	      }
-
-	    if (y == S7_INT64_MIN)                            /* (expt x most-negative-fixnum) */
-	      return(int_zero);
-	    if (x == S7_INT64_MIN)                            /* (expt most-negative-fixnum y) */
-	      return(make_real(sc, pow((double)x, (double)y)));
-
-	    if (int_pow_ok(x, s7_int_abs(y)))
-	      {
-		if (y > 0)
-		  return(make_integer(sc, int_to_int(x, y)));
-		return(make_ratio(sc, 1, int_to_int(x, -y)));
-	      }}
-	  break;
-
-	case T_RATIO:
-	  {
-	    s7_int nm = numerator(n), dn = denominator(n);
-	    if (y == S7_INT64_MIN)
-	      {
-		if (s7_int_abs(nm) > dn)
-		  return(int_zero);                  /* (expt 4/3 most-negative-fixnum) -> 0? */
-		return(real_infinity);               /* (expt 3/4 most-negative-fixnum) -> inf? */
-	      }
-	    if ((int_pow_ok(nm, s7_int_abs(y))) &&
-		(int_pow_ok(dn, s7_int_abs(y))))
-	      {
-		if (y > 0)
-		  return(make_ratio(sc, int_to_int(nm, y), int_to_int(dn, y)));
-		return(make_ratio_with_div_check(sc, sc->expt_symbol, int_to_int(dn, -y), int_to_int(nm, -y)));
-	      }}
-	  break;
-	  /* occasionally int^rat can be int32_t but it happens so infrequently it's probably not worth checking
-	   *  one possibly easy case: (expt 1 1/2) -> 1 (-1?) etc
-	   */
-
-	case T_REAL:
-	  /* (expt -1.0 most-positive-fixnum) should be -1.0
-	   * (expt -1.0 (+ (expt 2 53) 1)) -> -1.0
-	   * (expt -1.0 (- 1 (expt 2 54))) -> -1.0
-	   */
-	  if (real(n) == -1.0)
-	    {
-	      if (y == S7_INT64_MIN)
-		return(real_one);
-	      return((s7_int_abs(y) & 1) ? n : real_one);
-	    }
-	  break;
-
-	case T_COMPLEX:
+        {
+        case T_INTEGER:
+          {
+            s7_int x = integer(n);
+            if (x == 1)                                       /* (expt 1 y) */
+              return(n);
+
+            if (x == -1)
+              {
+                if (y == S7_INT64_MIN)                        /* (expt -1 most-negative-fixnum) */
+                  return(int_one);
+                if (s7_int_abs(y) & 1)                        /* (expt -1 odd-int) */
+                  return(n);
+                return(int_one);                              /* (expt -1 even-int) */
+              }
+
+            if (y == S7_INT64_MIN)                            /* (expt x most-negative-fixnum) */
+              return(int_zero);
+            if (x == S7_INT64_MIN)                            /* (expt most-negative-fixnum y) */
+              return(make_real(sc, pow((double)x, (double)y)));
+
+            if (int_pow_ok(x, s7_int_abs(y)))
+              {
+                if (y > 0)
+                  return(make_integer(sc, int_to_int(x, y)));
+                return(make_ratio(sc, 1, int_to_int(x, -y)));
+              }}
+          break;
+
+        case T_RATIO:
+          {
+            s7_int nm = numerator(n), dn = denominator(n);
+            if (y == S7_INT64_MIN)
+              {
+                if (s7_int_abs(nm) > dn)
+                  return(int_zero);                  /* (expt 4/3 most-negative-fixnum) -> 0? */
+                return(real_infinity);               /* (expt 3/4 most-negative-fixnum) -> inf? */
+              }
+            if ((int_pow_ok(nm, s7_int_abs(y))) &&
+                (int_pow_ok(dn, s7_int_abs(y))))
+              {
+                if (y > 0)
+                  return(make_ratio(sc, int_to_int(nm, y), int_to_int(dn, y)));
+                return(make_ratio_with_div_check(sc, sc->expt_symbol, int_to_int(dn, -y), int_to_int(nm, -y)));
+              }}
+          break;
+          /* occasionally int^rat can be int32_t but it happens so infrequently it's probably not worth checking
+           *  one possibly easy case: (expt 1 1/2) -> 1 (-1?) etc
+           */
+
+        case T_REAL:
+          /* (expt -1.0 most-positive-fixnum) should be -1.0
+           * (expt -1.0 (+ (expt 2 53) 1)) -> -1.0
+           * (expt -1.0 (- 1 (expt 2 54))) -> -1.0
+           */
+          if (real(n) == -1.0)
+            {
+              if (y == S7_INT64_MIN)
+                return(real_one);
+              return((s7_int_abs(y) & 1) ? n : real_one);
+            }
+          break;
+
+        case T_COMPLEX:
 #if HAVE_COMPLEX_NUMBERS
-	  if ((s7_real_part(n) == 0.0) &&
-	      ((s7_imag_part(n) == 1.0) ||
-	       (s7_imag_part(n) == -1.0)))
-	    {
-	      bool yp = (y > 0), np = (s7_imag_part(n) > 0.0);
-	      switch (s7_int_abs(y) % 4)
-		{
-		case 0: return(real_one);
-		case 1: return(make_complex_not_0i(sc, 0.0, (yp == np) ? 1.0 : -1.0));
-		case 2: return(make_real(sc, -1.0));
-		case 3: return(make_complex_not_0i(sc, 0.0, (yp == np) ? -1.0 : 1.0));
-		}}
+          if ((s7_real_part(n) == 0.0) &&
+              ((s7_imag_part(n) == 1.0) ||
+               (s7_imag_part(n) == -1.0)))
+            {
+              bool yp = (y > 0), np = (s7_imag_part(n) > 0.0);
+              switch (s7_int_abs(y) % 4)
+                {
+                case 0: return(real_one);
+                case 1: return(make_complex_not_0i(sc, 0.0, (yp == np) ? 1.0 : -1.0));
+                case 2: return(make_real(sc, -1.0));
+                case 3: return(make_complex_not_0i(sc, 0.0, (yp == np) ? -1.0 : 1.0));
+                }}
 #else
-	  out_of_range_error_nr(sc, sc->expt_symbol, int_two, n, no_complex_numbers_string);
+          out_of_range_error_nr(sc, sc->expt_symbol, int_two, n, no_complex_numbers_string);
 #endif
-	  break;
-	}}
+          break;
+        }}
 
   if ((is_real(n)) &&
       (is_real(pw)))
@@ -18504,14 +18504,14 @@ static s7_pointer expt_p_pp(s7_scheme *sc, s7_pointer n, s7_pointer pw)
       s7_double x, y;
 
       if ((is_t_ratio(pw)) &&
-	  (numerator(pw) == 1))
-	{
-	  if (denominator(pw) == 2)
-	    return(sqrt_p_p(sc, n));
-	  if (denominator(pw) == 3)
-	    return(make_real(sc, cbrt(s7_real(n)))); /* (expt 27 1/3) should be 3, not 3.0... */
-	  /* but: (expt 512/729 1/3) -> 0.88888888888889, and 4 -> sqrt(sqrt...) etc? */
-	}
+          (numerator(pw) == 1))
+        {
+          if (denominator(pw) == 2)
+            return(sqrt_p_p(sc, n));
+          if (denominator(pw) == 3)
+            return(make_real(sc, cbrt(s7_real(n)))); /* (expt 27 1/3) should be 3, not 3.0... */
+          /* but: (expt 512/729 1/3) -> 0.88888888888889, and 4 -> sqrt(sqrt...) etc? */
+        }
 
       x = s7_real(n);
       y = s7_real(pw);
@@ -18520,7 +18520,7 @@ static s7_pointer expt_p_pp(s7_scheme *sc, s7_pointer n, s7_pointer pw)
       if (y == 0.0) return(real_one);
       /* I think pow(rl, inf) is ok */
       if (x > 0.0)
-	return(make_real(sc, pow(x, y)));      /* tricky cases abound here: (expt -1 1/9223372036854775807) */
+        return(make_real(sc, pow(x, y)));      /* tricky cases abound here: (expt -1 1/9223372036854775807) */
     }
 
   /* (expt 0+i 1e+16) = 0.98156860153485-0.19111012657867i ?
@@ -18552,33 +18552,33 @@ static s7_pointer big_lcm(s7_scheme *sc, s7_int num, s7_int den, s7_pointer args
     {
       s7_pointer rat = car(x);
       switch (type(rat))
-	{
-	case T_INTEGER:
-	  mpz_set_si(sc->mpz_1, integer(rat));
-	  mpz_lcm(sc->mpz_3, sc->mpz_3, sc->mpz_1);
-	  mpz_set_si(sc->mpz_4, 1);
-	  break;
-	case T_RATIO:
-	  mpz_set_si(sc->mpz_1, numerator(rat));
-	  mpz_set_si(sc->mpz_2, denominator(rat));
-	  mpz_lcm(sc->mpz_3, sc->mpz_3, sc->mpz_1);
-	  mpz_gcd(sc->mpz_4, sc->mpz_4, sc->mpz_2);
-	  break;
-	case T_BIG_INTEGER:
-	  mpz_lcm(sc->mpz_3, sc->mpz_3, big_integer(rat));
-	  mpz_set_si(sc->mpz_4, 1);
-	  break;
-	case T_BIG_RATIO:
-	  mpz_lcm(sc->mpz_3, sc->mpz_3, mpq_numref(big_ratio(rat)));
-	  mpz_gcd(sc->mpz_4, sc->mpz_4, mpq_denref(big_ratio(rat)));
-	  break;
-	case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
-	  wrong_type_error_nr(sc, sc->lcm_symbol, position_of(x, args), rat, a_rational_string);
-	default:
-	  return(method_or_bust(sc, rat, sc->lcm_symbol,
-				set_ulist_1(sc, mpz_to_rational(sc, sc->mpz_3, sc->mpz_4), x),
-				a_rational_string, position_of(x, args)));
-	}}
+        {
+        case T_INTEGER:
+          mpz_set_si(sc->mpz_1, integer(rat));
+          mpz_lcm(sc->mpz_3, sc->mpz_3, sc->mpz_1);
+          mpz_set_si(sc->mpz_4, 1);
+          break;
+        case T_RATIO:
+          mpz_set_si(sc->mpz_1, numerator(rat));
+          mpz_set_si(sc->mpz_2, denominator(rat));
+          mpz_lcm(sc->mpz_3, sc->mpz_3, sc->mpz_1);
+          mpz_gcd(sc->mpz_4, sc->mpz_4, sc->mpz_2);
+          break;
+        case T_BIG_INTEGER:
+          mpz_lcm(sc->mpz_3, sc->mpz_3, big_integer(rat));
+          mpz_set_si(sc->mpz_4, 1);
+          break;
+        case T_BIG_RATIO:
+          mpz_lcm(sc->mpz_3, sc->mpz_3, mpq_numref(big_ratio(rat)));
+          mpz_gcd(sc->mpz_4, sc->mpz_4, mpq_denref(big_ratio(rat)));
+          break;
+        case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
+          wrong_type_error_nr(sc, sc->lcm_symbol, position_of(x, args), rat, a_rational_string);
+        default:
+          return(method_or_bust(sc, rat, sc->lcm_symbol,
+                                set_ulist_1(sc, mpz_to_rational(sc, sc->mpz_3, sc->mpz_4), x),
+                                a_rational_string, position_of(x, args)));
+        }}
   return(mpz_to_rational(sc, sc->mpz_3, sc->mpz_4));
 }
 #endif
@@ -18597,7 +18597,7 @@ static s7_pointer g_lcm(s7_scheme *sc, s7_pointer args)
   if (!is_pair(cdr(args)))
     {
       if (!is_rational(car(args)))
-	return(method_or_bust(sc, car(args), sc->lcm_symbol, args, a_rational_string, 1));
+        return(method_or_bust(sc, car(args), sc->lcm_symbol, args, a_rational_string, 1));
       return(g_abs(sc, args));
     }
 
@@ -18609,97 +18609,97 @@ static s7_pointer g_lcm(s7_scheme *sc, s7_pointer args)
       s7_int n1;
 #endif
       switch (type(x))
-	{
-	case T_INTEGER:
-	  d = 1;
-	  if (integer(x) == 0) /* return 0 unless there's a wrong-type-arg (geez what a mess) */
-	    {
-	      for (p = cdr(p); is_pair(p); p = cdr(p))
-		{
-		  s7_pointer x1 = car(p);
-		  if (is_number(x1))
-		    {
-		      if (!is_rational(x1))
-			wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x1, a_rational_string);
-		    }
-		  else
-		    if (has_active_methods(sc, x1))
-		      {
-			s7_pointer f = find_method_with_let(sc, x1, sc->is_rational_symbol);
-			if ((f == sc->undefined) ||
-			    (is_false(sc, s7_apply_function(sc, f, set_plist_1(sc, x1)))))
-			  wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x1, a_rational_string);
-		      }
-		    else wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x1, a_rational_string);
-		}
-	      return(int_zero);
-	    }
-	  b = integer(x);
-	  if (b < 0)
-	    {
-	      if (b == S7_INT64_MIN)
+        {
+        case T_INTEGER:
+          d = 1;
+          if (integer(x) == 0) /* return 0 unless there's a wrong-type-arg (geez what a mess) */
+            {
+              for (p = cdr(p); is_pair(p); p = cdr(p))
+                {
+                  s7_pointer x1 = car(p);
+                  if (is_number(x1))
+                    {
+                      if (!is_rational(x1))
+                        wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x1, a_rational_string);
+                    }
+                  else
+                    if (has_active_methods(sc, x1))
+                      {
+                        s7_pointer f = find_method_with_let(sc, x1, sc->is_rational_symbol);
+                        if ((f == sc->undefined) ||
+                            (is_false(sc, s7_apply_function(sc, f, set_plist_1(sc, x1)))))
+                          wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x1, a_rational_string);
+                      }
+                    else wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x1, a_rational_string);
+                }
+              return(int_zero);
+            }
+          b = integer(x);
+          if (b < 0)
+            {
+              if (b == S7_INT64_MIN)
 #if WITH_GMP
-		return(big_lcm(sc, n, d, p));
+                return(big_lcm(sc, n, d, p));
 #else
-		sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, it_is_too_large_string);
+                sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, it_is_too_large_string);
 #endif
-	      b = -b;
-	    }
+              b = -b;
+            }
 #if HAVE_OVERFLOW_CHECKS
-	  if (multiply_overflow(n / c_gcd(n, b), b, &n1))
+          if (multiply_overflow(n / c_gcd(n, b), b, &n1))
 #if WITH_GMP
-	    return(big_lcm(sc, n, d, p));
+            return(big_lcm(sc, n, d, p));
 #else
-	    sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, result_is_too_large_string);
+            sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, result_is_too_large_string);
 #endif
-	  n = n1;
+          n = n1;
 #else
-	  n = (n / c_gcd(n, b)) * b;
+          n = (n / c_gcd(n, b)) * b;
 #endif
-	  break;
+          break;
 
-	case T_RATIO:
-	  b = numerator(x);
-	  if (b < 0)
-	    {
-	      if (b == S7_INT64_MIN)
+        case T_RATIO:
+          b = numerator(x);
+          if (b < 0)
+            {
+              if (b == S7_INT64_MIN)
 #if WITH_GMP
-		return(big_lcm(sc, n, d, p));
+                return(big_lcm(sc, n, d, p));
 #else
-		sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, it_is_too_large_string);
+                sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, it_is_too_large_string);
 #endif
-	      b = -b;
-	    }
+              b = -b;
+            }
 #if HAVE_OVERFLOW_CHECKS
-	  if (multiply_overflow(n / c_gcd(n, b), b, &n1))  /* (lcm 92233720368547758/3 3005/2) */
+          if (multiply_overflow(n / c_gcd(n, b), b, &n1))  /* (lcm 92233720368547758/3 3005/2) */
 #if WITH_GMP
-	    return(big_lcm(sc, n, d, p));
+            return(big_lcm(sc, n, d, p));
 #else
-	    sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, intermediate_too_large_string);
+            sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, intermediate_too_large_string);
 #endif
           n = n1;
 #else
-	  n = (n / c_gcd(n, b)) * b;
+          n = (n / c_gcd(n, b)) * b;
 #endif
-	  if (d == 0)
-	    d = (p == args) ? denominator(x) : 1;
-	  else d = c_gcd(d, denominator(x));
-	  break;
+          if (d == 0)
+            d = (p == args) ? denominator(x) : 1;
+          else d = c_gcd(d, denominator(x));
+          break;
 
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  d = 1;
-	case T_BIG_RATIO:
-	  return(big_lcm(sc, n, d, p));
-#endif
-	case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
-	  wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x, a_rational_string);
-
-	default:
-	  return(method_or_bust(sc, x, sc->lcm_symbol,
-				set_ulist_1(sc, (d <= 1) ? make_integer(sc, n) : make_ratio_with_div_check(sc, sc->lcm_symbol, n, d), p),
-				a_rational_string, position_of(p, args)));
-	}}
+        case T_BIG_INTEGER:
+          d = 1;
+        case T_BIG_RATIO:
+          return(big_lcm(sc, n, d, p));
+#endif
+        case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
+          wrong_type_error_nr(sc, sc->lcm_symbol, position_of(p, args), x, a_rational_string);
+
+        default:
+          return(method_or_bust(sc, x, sc->lcm_symbol,
+                                set_ulist_1(sc, (d <= 1) ? make_integer(sc, n) : make_ratio_with_div_check(sc, sc->lcm_symbol, n, d), p),
+                                a_rational_string, position_of(p, args)));
+        }}
   return((d <= 1) ? make_integer(sc, n) : make_simple_ratio(sc, n, d));
 }
 
@@ -18715,31 +18715,31 @@ static s7_pointer big_gcd(s7_scheme *sc, s7_int num, s7_int den, s7_pointer args
     {
       s7_pointer rat = car(x);
       switch (type(rat))
-	{
-	case T_INTEGER:
-	  mpz_set_si(sc->mpz_1, integer(rat));
-	  mpz_gcd(sc->mpz_3, sc->mpz_3, sc->mpz_1);
-	  break;
-	case T_RATIO:
-	  mpz_set_si(sc->mpz_1, numerator(rat));
-	  mpz_set_si(sc->mpz_2, denominator(rat));
-	  mpz_gcd(sc->mpz_3, sc->mpz_3, sc->mpz_1);
-	  mpz_lcm(sc->mpz_4, sc->mpz_4, sc->mpz_2);
-	  break;
-	case T_BIG_INTEGER:
-	  mpz_gcd(sc->mpz_3, sc->mpz_3, big_integer(rat));
-	  break;
-	case T_BIG_RATIO:
-	  mpz_gcd(sc->mpz_3, sc->mpz_3, mpq_numref(big_ratio(rat)));
-	  mpz_lcm(sc->mpz_4, sc->mpz_4, mpq_denref(big_ratio(rat)));
-	  break;
-	case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
-	  wrong_type_error_nr(sc, sc->gcd_symbol, position_of(x, args), rat, a_rational_string);
-	default:
-	  return(method_or_bust(sc, rat, sc->gcd_symbol,
-				set_ulist_1(sc, mpz_to_rational(sc, sc->mpz_3, sc->mpz_4), x),
-				a_rational_string, position_of(x, args)));
-	}}
+        {
+        case T_INTEGER:
+          mpz_set_si(sc->mpz_1, integer(rat));
+          mpz_gcd(sc->mpz_3, sc->mpz_3, sc->mpz_1);
+          break;
+        case T_RATIO:
+          mpz_set_si(sc->mpz_1, numerator(rat));
+          mpz_set_si(sc->mpz_2, denominator(rat));
+          mpz_gcd(sc->mpz_3, sc->mpz_3, sc->mpz_1);
+          mpz_lcm(sc->mpz_4, sc->mpz_4, sc->mpz_2);
+          break;
+        case T_BIG_INTEGER:
+          mpz_gcd(sc->mpz_3, sc->mpz_3, big_integer(rat));
+          break;
+        case T_BIG_RATIO:
+          mpz_gcd(sc->mpz_3, sc->mpz_3, mpq_numref(big_ratio(rat)));
+          mpz_lcm(sc->mpz_4, sc->mpz_4, mpq_denref(big_ratio(rat)));
+          break;
+        case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
+          wrong_type_error_nr(sc, sc->gcd_symbol, position_of(x, args), rat, a_rational_string);
+        default:
+          return(method_or_bust(sc, rat, sc->gcd_symbol,
+                                set_ulist_1(sc, mpz_to_rational(sc, sc->mpz_3, sc->mpz_4), x),
+                                a_rational_string, position_of(x, args)));
+        }}
   return(mpz_to_rational(sc, sc->mpz_3, sc->mpz_4));
 }
 #endif
@@ -18757,7 +18757,7 @@ static s7_pointer g_gcd(s7_scheme *sc, s7_pointer args)
   if (!is_pair(cdr(args)))  /* (gcd 3/4) */
     {
       if (!is_rational(car(args)))
-	return(method_or_bust(sc, car(args), sc->gcd_symbol, args, a_rational_string, 1));
+        return(method_or_bust(sc, car(args), sc->gcd_symbol, args, a_rational_string, 1));
       return(abs_p_p(sc, car(args)));
     }
 
@@ -18765,56 +18765,56 @@ static s7_pointer g_gcd(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer x = car(p);
       switch (type(x))
-	{
-	case T_INTEGER:
-	  if (integer(x) == S7_INT64_MIN)
+        {
+        case T_INTEGER:
+          if (integer(x) == S7_INT64_MIN)
 #if WITH_GMP
-	    return(big_gcd(sc, n, d, p));
+            return(big_gcd(sc, n, d, p));
 #else
-	    sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, it_is_too_large_string);
+            sole_arg_out_of_range_error_nr(sc, sc->lcm_symbol, args, it_is_too_large_string);
 #endif
-	  n = c_gcd(n, integer(x));
-	  break;
+          n = c_gcd(n, integer(x));
+          break;
 
-	case T_RATIO:
-	  {
+        case T_RATIO:
+          {
 #if HAVE_OVERFLOW_CHECKS
-	    s7_int dn;
-#endif
-	    n = c_gcd(n, numerator(x));
-	    if (d == 1)
-	      d = denominator(x);
-	    else
-	      {
-		s7_int b = denominator(x);
+            s7_int dn;
+#endif
+            n = c_gcd(n, numerator(x));
+            if (d == 1)
+              d = denominator(x);
+            else
+              {
+                s7_int b = denominator(x);
 #if HAVE_OVERFLOW_CHECKS
-		if (multiply_overflow(d / c_gcd(d, b), b, &dn)) /* (gcd 1/92233720368547758 1/3005) */
+                if (multiply_overflow(d / c_gcd(d, b), b, &dn)) /* (gcd 1/92233720368547758 1/3005) */
 #if WITH_GMP
-		  return(big_gcd(sc, n, d, x));
+                  return(big_gcd(sc, n, d, x));
 #else
-		  sole_arg_out_of_range_error_nr(sc, sc->gcd_symbol, args, intermediate_too_large_string);
+                  sole_arg_out_of_range_error_nr(sc, sc->gcd_symbol, args, intermediate_too_large_string);
 #endif
-		d = dn;
+                d = dn;
 #else
-		d = (d / c_gcd(d, b)) * b;
+                d = (d / c_gcd(d, b)) * b;
 #endif
-	      }}
-	  break;
+              }}
+          break;
 
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	case T_BIG_RATIO:
-	  return(big_gcd(sc, n, d, p));
+        case T_BIG_INTEGER:
+        case T_BIG_RATIO:
+          return(big_gcd(sc, n, d, p));
 #endif
 
-	case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
-	  wrong_type_error_nr(sc, sc->gcd_symbol, position_of(p, args), x, a_rational_string);
+        case T_REAL: case T_BIG_REAL: case T_COMPLEX: case T_BIG_COMPLEX:
+          wrong_type_error_nr(sc, sc->gcd_symbol, position_of(p, args), x, a_rational_string);
 
-	default:
-	  return(method_or_bust(sc, x, sc->gcd_symbol,
-				set_ulist_1(sc, (d <= 1) ? make_integer(sc, n) : make_ratio_with_div_check(sc, sc->gcd_symbol, n, d), p),
-				a_rational_string, position_of(p, args)));
-	}}
+        default:
+          return(method_or_bust(sc, x, sc->gcd_symbol,
+                                set_ulist_1(sc, (d <= 1) ? make_integer(sc, n) : make_ratio_with_div_check(sc, sc->gcd_symbol, n, d), p),
+                                a_rational_string, position_of(p, args)));
+        }}
   return((d <= 1) ? make_integer(sc, n) : make_simple_ratio(sc, n, d));
 }
 
@@ -18828,35 +18828,35 @@ static s7_pointer floor_p_p(s7_scheme *sc, s7_pointer x)
       return(x);
     case T_RATIO:
       {
-	s7_int val = numerator(x) / denominator(x);
-	/* C "/" truncates? -- C spec says "truncation toward 0" */
-	/* we're avoiding "floor" here because the int->double conversion introduces inaccuracies for big numbers
-	 *   but it's used by opt_i_d_c (via s7_number_to_real) so floor_i_7d below can return different results:
-	 *   (let () (define (func) (do ((i 0 (+ i 1))) ((= i 1)) (display (floor 3441313796169221281/1720656898084610641)) (newline))) (func)): 1
-	 *   (let () (define (func) (do ((i 0 (+ i 1))) ((= i 1)) (display (/ (floor 3441313796169221281/1720656898084610641))) (newline))) (func)): 1/2
-	 */
-	return(make_integer(sc, (numerator(x) < 0) ? (val - 1) : val)); /* not "val" because it might be truncated to 0 */
+        s7_int val = numerator(x) / denominator(x);
+        /* C "/" truncates? -- C spec says "truncation toward 0" */
+        /* we're avoiding "floor" here because the int->double conversion introduces inaccuracies for big numbers
+         *   but it's used by opt_i_d_c (via s7_number_to_real) so floor_i_7d below can return different results:
+         *   (let () (define (func) (do ((i 0 (+ i 1))) ((= i 1)) (display (floor 3441313796169221281/1720656898084610641)) (newline))) (func)): 1
+         *   (let () (define (func) (do ((i 0 (+ i 1))) ((= i 1)) (display (/ (floor 3441313796169221281/1720656898084610641))) (newline))) (func)): 1/2
+         */
+        return(make_integer(sc, (numerator(x) < 0) ? (val - 1) : val)); /* not "val" because it might be truncated to 0 */
       }
     case T_REAL:
       {
-	s7_double z = real(x);
-	if (is_NaN(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_nan_string);
-	if (is_inf(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_infinite_string);
+        s7_double z = real(x);
+        if (is_NaN(z))
+          sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_nan_string);
+        if (is_inf(z))
+          sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_infinite_string);
 #if WITH_GMP
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, z, MPFR_RNDN);
-	    mpfr_get_z(sc->mpz_1, sc->mpfr_1, MPFR_RNDD);
-	    return(mpz_to_integer(sc, sc->mpz_1));
-	  }
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, z, MPFR_RNDN);
+            mpfr_get_z(sc->mpz_1, sc->mpfr_1, MPFR_RNDD);
+            return(mpz_to_integer(sc, sc->mpz_1));
+          }
 #else
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_too_large_string);
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_too_large_string);
 #endif
-	return(make_integer(sc, (s7_int)floor(z)));
-	/* floor here rounds down, whereas a straight int<=real coercion apparently rounds towards 0 */
+        return(make_integer(sc, (s7_int)floor(z)));
+        /* floor here rounds down, whereas a straight int<=real coercion apparently rounds towards 0 */
       }
 #if WITH_GMP
     case T_BIG_INTEGER:
@@ -18866,9 +18866,9 @@ static s7_pointer floor_p_p(s7_scheme *sc, s7_pointer x)
       return(mpz_to_integer(sc, sc->mpz_1));
     case T_BIG_REAL:
       if (mpfr_nan_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_nan_string);
+        sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_nan_string);
       if (mpfr_inf_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_infinite_string);
+        sole_arg_out_of_range_error_nr(sc, sc->floor_symbol, x, it_is_infinite_string);
       mpfr_get_z(sc->mpz_1, big_real(x), MPFR_RNDD);
       return(mpz_to_integer(sc, sc->mpz_1));
     case T_BIG_COMPLEX:
@@ -18924,28 +18924,28 @@ static s7_pointer ceiling_p_p(s7_scheme *sc, s7_pointer x)
       return(x);
     case T_RATIO:
       {
-	s7_int val = numerator(x) / denominator(x);
-	return(make_integer(sc, (numerator(x) < 0) ? val : (val + 1)));
+        s7_int val = numerator(x) / denominator(x);
+        return(make_integer(sc, (numerator(x) < 0) ? val : (val + 1)));
       }
     case T_REAL:
       {
-	s7_double z = real(x);
-	if (is_NaN(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_nan_string);
-	if (is_inf(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_infinite_string);
+        s7_double z = real(x);
+        if (is_NaN(z))
+          sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_nan_string);
+        if (is_inf(z))
+          sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_infinite_string);
 #if WITH_GMP
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, z, MPFR_RNDN);
-	    mpfr_get_z(sc->mpz_1, sc->mpfr_1, MPFR_RNDU);
-	    return(mpz_to_integer(sc, sc->mpz_1));
-	  }
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, z, MPFR_RNDN);
+            mpfr_get_z(sc->mpz_1, sc->mpfr_1, MPFR_RNDU);
+            return(mpz_to_integer(sc, sc->mpz_1));
+          }
 #else
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_too_large_string);
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_too_large_string);
 #endif
-	return(make_integer(sc, (s7_int)ceil(real(x))));
+        return(make_integer(sc, (s7_int)ceil(real(x))));
       }
 #if WITH_GMP
     case T_BIG_INTEGER:
@@ -18955,9 +18955,9 @@ static s7_pointer ceiling_p_p(s7_scheme *sc, s7_pointer x)
       return(mpz_to_integer(sc, sc->mpz_1));
     case T_BIG_REAL:
       if (mpfr_nan_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_nan_string);
+        sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_nan_string);
       if (mpfr_inf_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_infinite_string);
+        sole_arg_out_of_range_error_nr(sc, sc->ceiling_symbol, x, it_is_infinite_string);
       mpfr_get_z(sc->mpz_1, big_real(x), MPFR_RNDU);
       return(mpz_to_integer(sc, sc->mpz_1));
     case T_BIG_COMPLEX:
@@ -19012,23 +19012,23 @@ static s7_pointer truncate_p_p(s7_scheme *sc, s7_pointer x)
       return(make_integer(sc, (s7_int)(numerator(x) / denominator(x)))); /* C "/" already truncates (but this divide is not accurate over e13) */
     case T_REAL:
       {
-	s7_double z = real(x);
-	if (is_NaN(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_nan_string);
-	if (is_inf(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_infinite_string);
+        s7_double z = real(x);
+        if (is_NaN(z))
+          sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_nan_string);
+        if (is_inf(z))
+          sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_infinite_string);
 #if WITH_GMP
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	    mpfr_get_z(sc->mpz_1, sc->mpfr_1, MPFR_RNDZ);
-	    return(mpz_to_integer(sc, sc->mpz_1));
-	  }
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+            mpfr_get_z(sc->mpz_1, sc->mpfr_1, MPFR_RNDZ);
+            return(mpz_to_integer(sc, sc->mpz_1));
+          }
 #else
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_too_large_string);
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_too_large_string);
 #endif
-	return(make_integer(sc, (z > 0.0) ? (s7_int)floor(z) : (s7_int)ceil(z)));
+        return(make_integer(sc, (z > 0.0) ? (s7_int)floor(z) : (s7_int)ceil(z)));
       }
 #if WITH_GMP
     case T_BIG_INTEGER:
@@ -19038,9 +19038,9 @@ static s7_pointer truncate_p_p(s7_scheme *sc, s7_pointer x)
       return(mpz_to_integer(sc, sc->mpz_1));
     case T_BIG_REAL:
       if (mpfr_nan_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_nan_string);
+        sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_nan_string);
       if (mpfr_inf_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_infinite_string);
+        sole_arg_out_of_range_error_nr(sc, sc->truncate_symbol, x, it_is_infinite_string);
       mpfr_get_z(sc->mpz_1, big_real(x), MPFR_RNDZ);
       return(mpz_to_integer(sc, sc->mpz_1));
     case T_BIG_COMPLEX:
@@ -19096,58 +19096,58 @@ static s7_pointer round_p_p(s7_scheme *sc, s7_pointer x)
       return(x);
     case T_RATIO:
       {
-	s7_int truncated = numerator(x) / denominator(x), remains = numerator(x) % denominator(x);
-	long_double frac = s7_fabsl((long_double)remains / (long_double)denominator(x));
-	if ((frac > 0.5) ||
-	    ((frac == 0.5) &&
-	     (truncated % 2 != 0)))
-	  return(make_integer(sc, (numerator(x) < 0) ? (truncated - 1) : (truncated + 1)));
-	return(make_integer(sc, truncated));
+        s7_int truncated = numerator(x) / denominator(x), remains = numerator(x) % denominator(x);
+        long_double frac = s7_fabsl((long_double)remains / (long_double)denominator(x));
+        if ((frac > 0.5) ||
+            ((frac == 0.5) &&
+             (truncated % 2 != 0)))
+          return(make_integer(sc, (numerator(x) < 0) ? (truncated - 1) : (truncated + 1)));
+        return(make_integer(sc, truncated));
       }
     case T_REAL:
       {
-	s7_double z = real(x);
-	if (is_NaN(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_nan_string);
-	if (is_inf(z))
-	  sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_infinite_string);
+        s7_double z = real(x);
+        if (is_NaN(z))
+          sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_nan_string);
+        if (is_inf(z))
+          sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_infinite_string);
 #if WITH_GMP
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  {
-	    mpfr_set_d(sc->mpfr_1, z, MPFR_RNDN);
-	    mpfr_rint(sc->mpfr_2, sc->mpfr_1, MPFR_RNDN); /* mpfr_roundeven in mpfr 4.0.0 */
-	    mpfr_get_z(sc->mpz_3, sc->mpfr_2, MPFR_RNDN);
-	    return(mpz_to_integer(sc, sc->mpz_3));
-	  }
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          {
+            mpfr_set_d(sc->mpfr_1, z, MPFR_RNDN);
+            mpfr_rint(sc->mpfr_2, sc->mpfr_1, MPFR_RNDN); /* mpfr_roundeven in mpfr 4.0.0 */
+            mpfr_get_z(sc->mpz_3, sc->mpfr_2, MPFR_RNDN);
+            return(mpz_to_integer(sc, sc->mpz_3));
+          }
 #else
-	if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
-	  sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_too_large_string);
+        if (fabs(z) > DOUBLE_TO_INT64_LIMIT)
+          sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_too_large_string);
 #endif
-	return(make_integer(sc, (s7_int)r5rs_round(z)));
+        return(make_integer(sc, (s7_int)r5rs_round(z)));
       }
 #if WITH_GMP
       case T_BIG_INTEGER:
-	return(x);
+        return(x);
     case T_BIG_RATIO:
       {
-	int32_t rnd;
-	mpz_fdiv_qr(sc->mpz_1, sc->mpz_2, mpq_numref(big_ratio(x)), mpq_denref(big_ratio(x)));
-	mpz_mul_ui(sc->mpz_2, sc->mpz_2, 2);
-	rnd = mpz_cmpabs(sc->mpz_2, mpq_denref(big_ratio(x)));
-	mpz_fdiv_q(sc->mpz_2, sc->mpz_2, mpq_denref(big_ratio(x)));
-	if (rnd > 0)
-	  mpz_add(sc->mpz_1, sc->mpz_1, sc->mpz_2);
-	else
-	  if ((rnd == 0) &&
-	      (mpz_odd_p(sc->mpz_1)))
-	    mpz_add_ui(sc->mpz_1, sc->mpz_1, 1);
-	return(mpz_to_integer(sc, sc->mpz_1));
+        int32_t rnd;
+        mpz_fdiv_qr(sc->mpz_1, sc->mpz_2, mpq_numref(big_ratio(x)), mpq_denref(big_ratio(x)));
+        mpz_mul_ui(sc->mpz_2, sc->mpz_2, 2);
+        rnd = mpz_cmpabs(sc->mpz_2, mpq_denref(big_ratio(x)));
+        mpz_fdiv_q(sc->mpz_2, sc->mpz_2, mpq_denref(big_ratio(x)));
+        if (rnd > 0)
+          mpz_add(sc->mpz_1, sc->mpz_1, sc->mpz_2);
+        else
+          if ((rnd == 0) &&
+              (mpz_odd_p(sc->mpz_1)))
+            mpz_add_ui(sc->mpz_1, sc->mpz_1, 1);
+        return(mpz_to_integer(sc, sc->mpz_1));
       }
     case T_BIG_REAL:
       if (mpfr_nan_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_nan_string);
+        sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_nan_string);
       if (mpfr_inf_p(big_real(x)))
-	sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_infinite_string);
+        sole_arg_out_of_range_error_nr(sc, sc->round_symbol, x, it_is_infinite_string);
       mpfr_set(sc->mpfr_1, big_real(x), MPFR_RNDN);
       mpfr_rint(sc->mpfr_2, sc->mpfr_1, MPFR_RNDN);
       mpfr_get_z(sc->mpz_3, sc->mpfr_2, MPFR_RNDN);
@@ -19247,376 +19247,376 @@ static s7_pointer add_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (is_t_integer(x))
     {
       if (is_t_integer(y))
-	return(add_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
+        return(add_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
     }
   else
     if (is_t_real(x))
       {
-	if (is_t_real(y))
-	  return(make_real(sc, real(x) + real(y)));
+        if (is_t_real(y))
+          return(make_real(sc, real(x) + real(y)));
       }
     else
       if ((is_t_complex(x)) && (is_t_complex(y)))
-	return(make_complex(sc, real_part(x) + real_part(y), imag_part(x) + imag_part(y)));
+        return(make_complex(sc, real_part(x) + real_part(y), imag_part(x) + imag_part(y)));
 
   switch (type(x))
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(add_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
-	case T_RATIO:
-	  return(integer_ratio_add_if_overflow_to_real_or_rational(sc, x, y));
-	case T_REAL:
+        {
+        case T_INTEGER:
+          return(add_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
+        case T_RATIO:
+          return(integer_ratio_add_if_overflow_to_real_or_rational(sc, x, y));
+        case T_REAL:
 #if WITH_GMP
-	  if (s7_int_abs(integer(x)) >= INT64_TO_DOUBLE_LIMIT) /* (+ 9223372036854775807 .1), >= needed for (+ 9007199254740992 1.0) */
-	    {
-	      mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
-	      mpfr_add_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, (long_double)integer(x) + real(y)));
-	case T_COMPLEX:
-	  return(make_complex_not_0i(sc, (long_double)integer(x) + (long_double)real_part(y), imag_part(y)));
+          if (s7_int_abs(integer(x)) >= INT64_TO_DOUBLE_LIMIT) /* (+ 9223372036854775807 .1), >= needed for (+ 9007199254740992 1.0) */
+            {
+              mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
+              mpfr_add_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, (long_double)integer(x) + real(y)));
+        case T_COMPLEX:
+          return(make_complex_not_0i(sc, (long_double)integer(x) + (long_double)real_part(y), imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpz_set_si(sc->mpz_1, integer(x));
-	  mpz_add(sc->mpz_1, sc->mpz_1, big_integer(y));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, integer(x), 1);
-	  mpq_add(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_add_si(sc->mpfr_1, big_real(y), integer(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_si(sc->mpc_1, integer(x), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpz_set_si(sc->mpz_1, integer(x));
+          mpz_add(sc->mpz_1, sc->mpz_1, big_integer(y));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, integer(x), 1);
+          mpq_add(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_add_si(sc->mpfr_1, big_real(y), integer(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_si(sc->mpc_1, integer(x), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(integer_ratio_add_if_overflow_to_real_or_rational(sc, y, x));
-	case T_RATIO:
-	  {
-	    s7_int d1, d2, n1, n2;
-	    parcel_out_fractions(x, y);
-	    if (d1 == d2)
-	      {
+        {
+        case T_INTEGER:
+          return(integer_ratio_add_if_overflow_to_real_or_rational(sc, y, x));
+        case T_RATIO:
+          {
+            s7_int d1, d2, n1, n2;
+            parcel_out_fractions(x, y);
+            if (d1 == d2)
+              {
 #if HAVE_OVERFLOW_CHECKS
-		s7_int q;
-		if (add_overflow(n1, n2, &q))
+                s7_int q;
+                if (add_overflow(n1, n2, &q))
 #if WITH_GMP
-		  {
-		    mpq_set_si(sc->mpq_1, n1, d1);
-		    mpq_set_si(sc->mpq_2, n2, d2);
-		    mpq_add(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		    return(mpq_to_rational(sc, sc->mpq_1));
-		  }
+                  {
+                    mpq_set_si(sc->mpq_1, n1, d1);
+                    mpq_set_si(sc->mpq_2, n2, d2);
+                    mpq_add(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                    return(mpq_to_rational(sc, sc->mpq_1));
+                  }
 #else
-		  {
- 		    if (WITH_WARNINGS) s7_warn(sc, 128, "ratio + ratio overflow: (/ (+ %" ld64 " %" ld64 ") %" ld64 ")\n", n1, n2, d1);
-		    return(make_real(sc, ((long_double)n1 + (long_double)n2) / (long_double)d1));
-		  }
+                  {
+                     if (WITH_WARNINGS) s7_warn(sc, 128, "ratio + ratio overflow: (/ (+ %" ld64 " %" ld64 ") %" ld64 ")\n", n1, n2, d1);
+                    return(make_real(sc, ((long_double)n1 + (long_double)n2) / (long_double)d1));
+                  }
 #endif
-	        return(make_ratio_with_div_check(sc, sc->add_symbol, q, d1));
+                return(make_ratio_with_div_check(sc, sc->add_symbol, q, d1));
 #else
-		return(make_ratio_with_div_check(sc, sc->add_symbol, n1 + n2, d1));
+                return(make_ratio_with_div_check(sc, sc->add_symbol, n1 + n2, d1));
 #endif
-	      }
+              }
 
 #if HAVE_OVERFLOW_CHECKS
-	    {
-	      s7_int n1d2, n2d1, d1d2, q;
-	      if ((multiply_overflow(d1, d2, &d1d2)) ||
-		  (multiply_overflow(n1, d2, &n1d2)) ||
-		  (multiply_overflow(n2, d1, &n2d1)) ||
-		  (add_overflow(n1d2, n2d1, &q)))
+            {
+              s7_int n1d2, n2d1, d1d2, q;
+              if ((multiply_overflow(d1, d2, &d1d2)) ||
+                  (multiply_overflow(n1, d2, &n1d2)) ||
+                  (multiply_overflow(n2, d1, &n2d1)) ||
+                  (add_overflow(n1d2, n2d1, &q)))
 #if WITH_GMP
-		{
-		  mpq_set_si(sc->mpq_1, n1, d1);
-		  mpq_set_si(sc->mpq_2, n2, d2);
-		  mpq_add(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		  return(mpq_to_rational(sc, sc->mpq_1));
-		}
+                {
+                  mpq_set_si(sc->mpq_1, n1, d1);
+                  mpq_set_si(sc->mpq_2, n2, d2);
+                  mpq_add(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                  return(mpq_to_rational(sc, sc->mpq_1));
+                }
 #else
-	        {
- 		  if (WITH_WARNINGS) s7_warn(sc, 128, "ratio + ratio overflow: (+ %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
-	          return(make_real(sc, ((long_double)n1 / (long_double)d1) + ((long_double)n2 / (long_double)d2)));
-		}
+                {
+                   if (WITH_WARNINGS) s7_warn(sc, 128, "ratio + ratio overflow: (+ %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
+                  return(make_real(sc, ((long_double)n1 / (long_double)d1) + ((long_double)n2 / (long_double)d2)));
+                }
 #endif
-	      return(make_ratio_with_div_check(sc, sc->add_symbol, q, d1d2));
-	    }
+              return(make_ratio_with_div_check(sc, sc->add_symbol, q, d1d2));
+            }
 #else
-	    return(make_ratio_with_div_check(sc, sc->add_symbol, n1 * d2 + n2 * d1, d1 * d2));
+            return(make_ratio_with_div_check(sc, sc->add_symbol, n1 * d2 + n2 * d1, d1 * d2));
 #endif
-	  }
-	case T_REAL:
-	  return(make_real(sc, fraction(x) + real(y)));
-	case T_COMPLEX:
-	  return(make_complex_not_0i(sc, fraction(x) + real_part(y), imag_part(y)));
+          }
+        case T_REAL:
+          return(make_real(sc, fraction(x) + real(y)));
+        case T_COMPLEX:
+          return(make_complex_not_0i(sc, fraction(x) + real_part(y), imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpq_set_z(sc->mpq_2, big_integer(y));
-	  mpq_add(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpq_add(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpfr_add_q(sc->mpfr_1, big_real(y), sc->mpq_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpq_set_z(sc->mpq_2, big_integer(y));
+          mpq_add(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpq_add(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpfr_add_q(sc->mpfr_1, big_real(y), sc->mpq_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
+        {
+        case T_INTEGER:
 #if WITH_GMP
-	  if (s7_int_abs(integer(y)) >= INT64_TO_DOUBLE_LIMIT) /* (+ .1 9223372036854775807) */
-	    {
-	      mpfr_set_si(sc->mpfr_1, integer(y), MPFR_RNDN);
-	      mpfr_add_d(sc->mpfr_1, sc->mpfr_1, real(x), MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, real(x) + (long_double)integer(y)));
-	case T_RATIO:
-	  return(make_real(sc, real(x) + fraction(y)));
-	case T_REAL:
-	  return(make_real(sc, real(x) + real(y)));
-	case T_COMPLEX:
-	  return(make_complex_not_0i(sc, real(x) + real_part(y), imag_part(y)));
+          if (s7_int_abs(integer(y)) >= INT64_TO_DOUBLE_LIMIT) /* (+ .1 9223372036854775807) */
+            {
+              mpfr_set_si(sc->mpfr_1, integer(y), MPFR_RNDN);
+              mpfr_add_d(sc->mpfr_1, sc->mpfr_1, real(x), MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, real(x) + (long_double)integer(y)));
+        case T_RATIO:
+          return(make_real(sc, real(x) + fraction(y)));
+        case T_REAL:
+          return(make_real(sc, real(x) + real(y)));
+        case T_COMPLEX:
+          return(make_complex_not_0i(sc, real(x) + real_part(y), imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_add_z(sc->mpfr_1, sc->mpfr_1, big_integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_add_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  mpfr_add_d(sc->mpfr_1, big_real(y), real(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_add_z(sc->mpfr_1, sc->mpfr_1, big_integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_add_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          mpfr_add_d(sc->mpfr_1, big_real(y), real(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
 
     case T_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(make_complex_not_0i(sc, real_part(x) + integer(y), imag_part(x)));
-	case T_RATIO:
-	  return(make_complex_not_0i(sc, real_part(x) + fraction(y), imag_part(x)));
-	case T_REAL:
-	  return(make_complex_not_0i(sc, real_part(x) + real(y), imag_part(x)));
-	case T_COMPLEX:
-	  return(make_complex(sc, real_part(x) + real_part(y), imag_part(x) + imag_part(y)));
+        {
+        case T_INTEGER:
+          return(make_complex_not_0i(sc, real_part(x) + integer(y), imag_part(x)));
+        case T_RATIO:
+          return(make_complex_not_0i(sc, real_part(x) + fraction(y), imag_part(x)));
+        case T_REAL:
+          return(make_complex_not_0i(sc, real_part(x) + real(y), imag_part(x)));
+        case T_COMPLEX:
+          return(make_complex(sc, real_part(x) + real_part(y), imag_part(x) + imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_add_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_add_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpz_set_si(sc->mpz_1, integer(y));
-	  mpz_add(sc->mpz_1, big_integer(x), sc->mpz_1);
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_2, big_integer(x));
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpq_add(sc->mpq_1, sc->mpq_2, sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
-	  mpfr_add_z(sc->mpfr_1, sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpz_add(sc->mpz_1, big_integer(x), big_integer(y));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_BIG_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  mpq_add(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_add_z(sc->mpfr_1, big_real(y), big_integer(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpz_set_si(sc->mpz_1, integer(y));
+          mpz_add(sc->mpz_1, big_integer(x), sc->mpz_1);
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_RATIO:
+          mpq_set_z(sc->mpq_2, big_integer(x));
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpq_add(sc->mpq_1, sc->mpq_2, sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
+          mpfr_add_z(sc->mpfr_1, sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpz_add(sc->mpz_1, big_integer(x), big_integer(y));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_BIG_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          mpq_add(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_add_z(sc->mpfr_1, big_real(y), big_integer(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
 
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpq_set_si(sc->mpq_1, integer(y), 1);
-	  mpq_add(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpq_add(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
-	  mpfr_add_q(sc->mpfr_1, sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpq_set_z(sc->mpq_1, big_integer(y));
-	  mpq_add(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_add(sc->mpq_1, big_ratio(x), big_ratio(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_add_q(sc->mpfr_1, big_real(y), big_ratio(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpq_set_si(sc->mpq_1, integer(y), 1);
+          mpq_add(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpq_add(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
+          mpfr_add_q(sc->mpfr_1, sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpq_set_z(sc->mpq_1, big_integer(y));
+          mpq_add(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_add(sc->mpq_1, big_ratio(x), big_ratio(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_add_q(sc->mpfr_1, big_real(y), big_ratio(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_add(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
 
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpfr_add_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpfr_add_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_add_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_add_fr(sc->mpc_1, sc->mpc_1, big_real(x), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpfr_add_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_add_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  mpfr_add(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_add_fr(sc->mpc_1, big_complex(y), big_real(x), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpfr_add_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpfr_add_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_add_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_add_fr(sc->mpc_1, sc->mpc_1, big_real(x), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpfr_add_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_add_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          mpfr_add(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_add_fr(sc->mpc_1, big_complex(y), big_real(x), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
     case T_BIG_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpc_set_si(sc->mpc_1, integer(y), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_REAL:
-	  /* if (is_NaN(real(y))) return(y); */
-	  mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
-	  mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
-	  mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  mpc_add_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  mpc_add(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpc_set_si(sc->mpc_1, integer(y), MPC_RNDNN);
+          mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_REAL:
+          /* if (is_NaN(real(y))) return(y); */
+          mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
+          mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
+          mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
+          mpc_add(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          mpc_add_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          mpc_add(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->add_symbol, x, y, a_number_string, 2));
+        }
 #endif
       default:
-	return(method_or_bust_pp(sc, x, sc->add_symbol, x, y, a_number_string, 1));
+        return(method_or_bust_pp(sc, x, sc->add_symbol, x, y, a_number_string, 1));
     }
 }
 
@@ -19627,8 +19627,8 @@ static s7_pointer add_p_ppp(s7_scheme *sc, s7_pointer p0, s7_pointer p1, s7_poin
 #if HAVE_OVERFLOW_CHECKS
       s7_int val;
       if ((!add_overflow(integer(p0), integer(p1), &val)) &&
-	  (!add_overflow(val, integer(p2), &val)))
-	return(make_integer(sc, val));
+          (!add_overflow(val, integer(p2), &val)))
+        return(make_integer(sc, val));
 #if WITH_GMP
       mpz_set_si(sc->mpz_1, integer(p0));
       mpz_set_si(sc->mpz_2, integer(p1));
@@ -19668,7 +19668,7 @@ static s7_pointer g_add(s7_scheme *sc, s7_pointer args)
   if (is_null(p))
     {
       if (!is_number(x))
-	return(method_or_bust_p(sc, x, sc->add_symbol, a_number_string));
+        return(method_or_bust_p(sc, x, sc->add_symbol, a_number_string));
       return(x);
     }
   if (is_null(cdr(p)))
@@ -19704,8 +19704,8 @@ static s7_pointer g_add_x1_1(s7_scheme *sc, s7_pointer x, int32_t pos)
 #endif
     default:
       return(method_or_bust(sc, x, sc->add_symbol,
-			    (pos == 1) ? set_plist_2(sc, x, int_one) : set_plist_2(sc, int_one, x),
-			    a_number_string, pos));
+                            (pos == 1) ? set_plist_2(sc, x, int_one) : set_plist_2(sc, int_one, x),
+                            a_number_string, pos));
     }
   return(x);
 }
@@ -19796,11 +19796,11 @@ static s7_pointer add_2_if(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if ((is_t_integer(x)) && (is_t_real(y)))
     {
       if (s7_int_abs(integer(x)) >= INT64_TO_DOUBLE_LIMIT)
-	{
-	  mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
-	  mpfr_add_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
+          mpfr_add_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
       return(make_real(sc, integer(x) + real(y)));
     }
   return(add_p_pp(sc, x, y));
@@ -19841,18 +19841,18 @@ static s7_pointer argument_type(s7_scheme *sc, s7_pointer arg1)
   if (is_pair(arg1))
     {
       if (is_quote(car(arg1)))
-	return((is_pair(cdr(arg1))) ? s7_type_of(sc, cadr(arg1)) : NULL);    /* arg1 = (quote) */
+        return((is_pair(cdr(arg1))) ? s7_type_of(sc, cadr(arg1)) : NULL);    /* arg1 = (quote) */
 
       if ((is_h_optimized(arg1)) &&
-	  (is_safe_c_op(optimize_op(arg1))) &&
-	  (is_c_function(opt1_cfunc(arg1))))
-	{
-	  s7_pointer sig = c_function_signature(opt1_cfunc(arg1));
-	  if ((sig) &&
-	      (is_pair(sig)) &&
-	      (is_symbol(car(sig))))
-	    return(car(sig));
-	}
+          (is_safe_c_op(optimize_op(arg1))) &&
+          (is_c_function(opt1_cfunc(arg1))))
+        {
+          s7_pointer sig = c_function_signature(opt1_cfunc(arg1));
+          if ((sig) &&
+              (is_pair(sig)) &&
+              (is_symbol(car(sig))))
+            return(car(sig));
+        }
       /* perhaps add closure sig if we can depend on it (immutable func etc) */
     }
   else
@@ -19862,29 +19862,29 @@ static s7_pointer argument_type(s7_scheme *sc, s7_pointer arg1)
 }
 
 static s7_pointer chooser_check_arg_types(s7_scheme *sc, s7_pointer arg1, s7_pointer arg2, s7_pointer fallback,
-					  s7_pointer f_2_ff, s7_pointer f_2_ii, s7_pointer f_2_if, s7_pointer f_2_fi,
-					  s7_pointer f_2_xi, s7_pointer f_2_ix, s7_pointer f_2_fx, s7_pointer f_2_xf)
+                                          s7_pointer f_2_ff, s7_pointer f_2_ii, s7_pointer f_2_if, s7_pointer f_2_fi,
+                                          s7_pointer f_2_xi, s7_pointer f_2_ix, s7_pointer f_2_fx, s7_pointer f_2_xf)
 {
   const s7_pointer arg1_type = argument_type(sc, arg1);
   const s7_pointer arg2_type = argument_type(sc, arg2);
   if ((arg1_type) || (arg2_type))
     {
       if (arg1_type == sc->is_float_symbol)
-	{
-	  if (arg2_type == sc->is_float_symbol)
-	    return(f_2_ff);
-	  return((arg2_type == sc->is_integer_symbol) ? f_2_fi : f_2_fx);
-	}
+        {
+          if (arg2_type == sc->is_float_symbol)
+            return(f_2_ff);
+          return((arg2_type == sc->is_integer_symbol) ? f_2_fi : f_2_fx);
+        }
       if (arg1_type == sc->is_integer_symbol)
-	{
-	  if (arg2_type == sc->is_float_symbol)
-	    return(f_2_if);
-	  return((arg2_type == sc->is_integer_symbol) ? f_2_ii : f_2_ix);
-	}
+        {
+          if (arg2_type == sc->is_float_symbol)
+            return(f_2_if);
+          return((arg2_type == sc->is_integer_symbol) ? f_2_ii : f_2_ix);
+        }
       if (arg2_type == sc->is_float_symbol)
-	return(f_2_xf);
+        return(f_2_xf);
       if (arg2_type == sc->is_integer_symbol)
-	return(f_2_xi);
+        return(f_2_xi);
     }
   return(fallback);
 }
@@ -19898,18 +19898,18 @@ static s7_pointer add_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_poin
     {
       s7_pointer arg1 = cadr(expr), arg2 = caddr(expr);
       if (arg2 == int_one)                          /* (+ ... 1) */
-	return(sc->add_x1);
+        return(sc->add_x1);
       if ((is_t_integer(arg1)) && ((is_pair(arg2)) && (is_optimized(arg2)) && (is_h_safe_c_nc(arg2)) && (fn_proc(arg2) == g_random_i)))
-	{
-	  set_opt3_int(cdr(expr), integer(cadr(arg2)));
-	  set_safe_optimize_op(expr, HOP_SAFE_C_NC); /* op if r op? */
-	  return(sc->add_i_random);
-	}
+        {
+          set_opt3_int(cdr(expr), integer(cadr(arg2)));
+          set_safe_optimize_op(expr, HOP_SAFE_C_NC); /* op if r op? */
+          return(sc->add_i_random);
+        }
       if (arg1 == int_one)
-	return(sc->add_1x);
+        return(sc->add_1x);
       return(chooser_check_arg_types(sc, arg1, arg2, sc->add_2,
-				     sc->add_2_ff, sc->add_2_ii, sc->add_2_if, sc->add_2_fi,
-				     sc->add_2_xi, sc->add_2_ix, sc->add_2_fx, sc->add_2_xf));
+                                     sc->add_2_ff, sc->add_2_ii, sc->add_2_if, sc->add_2_fi,
+                                     sc->add_2_xi, sc->add_2_ix, sc->add_2_fx, sc->add_2_xf));
     }
   return(sc->add_2);
 }
@@ -19922,13 +19922,13 @@ static s7_pointer negate_p_p(s7_scheme *sc, s7_pointer p)     /* can't use "nega
     case T_INTEGER:
       if (integer(p) == S7_INT64_MIN)
 #if WITH_GMP
-	{
-	  mpz_set_si(sc->mpz_1, S7_INT64_MIN);
-	  mpz_neg(sc->mpz_1, sc->mpz_1);
-	  return(mpz_to_big_integer(sc, sc->mpz_1));
-	}
+        {
+          mpz_set_si(sc->mpz_1, S7_INT64_MIN);
+          mpz_neg(sc->mpz_1, sc->mpz_1);
+          return(mpz_to_big_integer(sc, sc->mpz_1));
+        }
 #else
-	sole_arg_out_of_range_error_nr(sc, sc->subtract_symbol, p, wrap_string(sc, "most-negative-fixnum can't be negated", 37));
+        sole_arg_out_of_range_error_nr(sc, sc->subtract_symbol, p, wrap_string(sc, "most-negative-fixnum can't be negated", 37));
 #endif
       return(make_integer(sc, -integer(p)));
 
@@ -19985,414 +19985,414 @@ static s7_pointer subtract_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       if (integer(x) == 0)
-	return(negate_p_p(sc, y));
+        return(negate_p_p(sc, y));
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(subtract_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
+        {
+        case T_INTEGER:
+          return(subtract_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
 
-	case T_RATIO:
-	  {
+        case T_RATIO:
+          {
 #if HAVE_OVERFLOW_CHECKS
-	    s7_int z;
-	    if ((multiply_overflow(integer(x), denominator(y), &z)) ||
-		(subtract_overflow(z, numerator(y), &z)))
+            s7_int z;
+            if ((multiply_overflow(integer(x), denominator(y), &z)) ||
+                (subtract_overflow(z, numerator(y), &z)))
 #if WITH_GMP
-	      {
-		mpz_set_si(sc->mpz_1, integer(x));
-		mpz_mul_si(sc->mpz_1, sc->mpz_1, denominator(y));
-		mpz_set_si(sc->mpz_2, numerator(y));
-		mpz_sub(mpq_numref(sc->mpq_1), sc->mpz_1, sc->mpz_2);
-		mpz_set_si(mpq_denref(sc->mpq_1), denominator(y));
-		return(mpq_to_rational(sc, sc->mpq_1));
-	      }
+              {
+                mpz_set_si(sc->mpz_1, integer(x));
+                mpz_mul_si(sc->mpz_1, sc->mpz_1, denominator(y));
+                mpz_set_si(sc->mpz_2, numerator(y));
+                mpz_sub(mpq_numref(sc->mpq_1), sc->mpz_1, sc->mpz_2);
+                mpz_set_si(mpq_denref(sc->mpq_1), denominator(y));
+                return(mpq_to_rational(sc, sc->mpq_1));
+              }
 #else
-	      {
-		if (WITH_WARNINGS) s7_warn(sc, 128, "integer - ratio overflow: (- %" ld64 " %" ld64 "/%" ld64 ")\n", integer(x), numerator(y), denominator(y));
-		return(make_real(sc, (long_double)integer(x) - fraction(y)));
-	      }
+              {
+                if (WITH_WARNINGS) s7_warn(sc, 128, "integer - ratio overflow: (- %" ld64 " %" ld64 "/%" ld64 ")\n", integer(x), numerator(y), denominator(y));
+                return(make_real(sc, (long_double)integer(x) - fraction(y)));
+              }
 #endif
-	      return(make_ratio(sc, z, denominator(y)));
+              return(make_ratio(sc, z, denominator(y)));
 #else
-	    return(make_ratio(sc, integer(x) * denominator(y) - numerator(y), denominator(y)));
+            return(make_ratio(sc, integer(x) * denominator(y) - numerator(y), denominator(y)));
 #endif
-	  }
-	case T_REAL:
+          }
+        case T_REAL:
 #if WITH_GMP
-	  if (s7_int_abs(integer(x)) >= INT64_TO_DOUBLE_LIMIT) /* (- 9223372036854775807 .1) */
-	    {
-	      mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
-	      mpfr_sub_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, (long_double)integer(x) - real(y)));
-	case T_COMPLEX:
-	  return(make_complex_not_0i(sc, (long_double)integer(x) - real_part(y), -imag_part(y)));
+          if (s7_int_abs(integer(x)) >= INT64_TO_DOUBLE_LIMIT) /* (- 9223372036854775807 .1) */
+            {
+              mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
+              mpfr_sub_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, (long_double)integer(x) - real(y)));
+        case T_COMPLEX:
+          return(make_complex_not_0i(sc, (long_double)integer(x) - real_part(y), -imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpz_set_si(sc->mpz_1, integer(x));
-	  mpz_sub(sc->mpz_1, sc->mpz_1, big_integer(y));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, integer(x), 1);
-	  mpq_sub(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_si_sub(sc->mpfr_1, integer(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_si(sc->mpc_1, integer(x), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpz_set_si(sc->mpz_1, integer(x));
+          mpz_sub(sc->mpz_1, sc->mpz_1, big_integer(y));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, integer(x), 1);
+          mpq_sub(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_si_sub(sc->mpfr_1, integer(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_si(sc->mpc_1, integer(x), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  {
+        {
+        case T_INTEGER:
+          {
 #if HAVE_OVERFLOW_CHECKS
-	    s7_int z;
-	    if ((multiply_overflow(integer(y), denominator(x), &z)) ||
-		(subtract_overflow(numerator(x), z, &z)))
+            s7_int z;
+            if ((multiply_overflow(integer(y), denominator(x), &z)) ||
+                (subtract_overflow(numerator(x), z, &z)))
 #if WITH_GMP
-	      {
-		mpz_set_si(sc->mpz_1, integer(y));
-		mpz_mul_si(sc->mpz_1, sc->mpz_1, denominator(x));
-		mpz_set_si(sc->mpz_2, numerator(x));
-		mpz_sub(mpq_numref(sc->mpq_1), sc->mpz_2, sc->mpz_1);
-		mpz_set_si(mpq_denref(sc->mpq_1), denominator(x));
-		return(mpq_to_rational(sc, sc->mpq_1));
-	      }
+              {
+                mpz_set_si(sc->mpz_1, integer(y));
+                mpz_mul_si(sc->mpz_1, sc->mpz_1, denominator(x));
+                mpz_set_si(sc->mpz_2, numerator(x));
+                mpz_sub(mpq_numref(sc->mpq_1), sc->mpz_2, sc->mpz_1);
+                mpz_set_si(mpq_denref(sc->mpq_1), denominator(x));
+                return(mpq_to_rational(sc, sc->mpq_1));
+              }
 #else
-	      {
-		if (WITH_WARNINGS) s7_warn(sc, 128, "ratio - integer overflow: (- %" ld64 "/%" ld64 " %" ld64 ")\n", numerator(x), denominator(x), integer(y));
-		return(make_real(sc, fraction(x) - (long_double)integer(y)));
-	      }
+              {
+                if (WITH_WARNINGS) s7_warn(sc, 128, "ratio - integer overflow: (- %" ld64 "/%" ld64 " %" ld64 ")\n", numerator(x), denominator(x), integer(y));
+                return(make_real(sc, fraction(x) - (long_double)integer(y)));
+              }
 #endif
-	    return(make_ratio(sc, z, denominator(x)));
+            return(make_ratio(sc, z, denominator(x)));
 #else
-	    return(make_ratio(sc, numerator(x) - (integer(y) * denominator(x)), denominator(x)));
-#endif
-	  }
-	case T_RATIO:
-	  {
-	    s7_int d1, d2, n1, n2;
-	    parcel_out_fractions(x, y);
-	    if (d1 == d2)
-	      {
+            return(make_ratio(sc, numerator(x) - (integer(y) * denominator(x)), denominator(x)));
+#endif
+          }
+        case T_RATIO:
+          {
+            s7_int d1, d2, n1, n2;
+            parcel_out_fractions(x, y);
+            if (d1 == d2)
+              {
 #if HAVE_OVERFLOW_CHECKS
-		s7_int q;
-		if (subtract_overflow(n1, n2, &q))
+                s7_int q;
+                if (subtract_overflow(n1, n2, &q))
 #if WITH_GMP
-		  {
-		    mpq_set_si(sc->mpq_1, n1, d1);
-		    mpq_set_si(sc->mpq_2, n2, d2);
-		    mpq_sub(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		    return(mpq_to_rational(sc, sc->mpq_1));
-		  }
+                  {
+                    mpq_set_si(sc->mpq_1, n1, d1);
+                    mpq_set_si(sc->mpq_2, n2, d2);
+                    mpq_sub(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                    return(mpq_to_rational(sc, sc->mpq_1));
+                  }
 #else
-		  {
-		    if (WITH_WARNINGS) s7_warn(sc, 128, "ratio - ratio overflow: (- %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
-		    return(make_real(sc, ((long_double)n1 - (long_double)n2) / (long_double)d1));
-		  }
+                  {
+                    if (WITH_WARNINGS) s7_warn(sc, 128, "ratio - ratio overflow: (- %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
+                    return(make_real(sc, ((long_double)n1 - (long_double)n2) / (long_double)d1));
+                  }
 #endif
-	        return(make_ratio_with_div_check(sc, sc->subtract_symbol, q, d1));
+                return(make_ratio_with_div_check(sc, sc->subtract_symbol, q, d1));
 #else
-		return(make_ratio(sc, numerator(x) - numerator(y), denominator(x)));
+                return(make_ratio(sc, numerator(x) - numerator(y), denominator(x)));
 #endif
-	      }
+              }
 
 #if HAVE_OVERFLOW_CHECKS
-	    {
-	      s7_int n1d2, n2d1, d1d2, q;
-	      if ((multiply_overflow(d1, d2, &d1d2)) ||
-		  (multiply_overflow(n1, d2, &n1d2)) ||
-		  (multiply_overflow(n2, d1, &n2d1)) ||
-		  (subtract_overflow(n1d2, n2d1, &q)))
+            {
+              s7_int n1d2, n2d1, d1d2, q;
+              if ((multiply_overflow(d1, d2, &d1d2)) ||
+                  (multiply_overflow(n1, d2, &n1d2)) ||
+                  (multiply_overflow(n2, d1, &n2d1)) ||
+                  (subtract_overflow(n1d2, n2d1, &q)))
 #if WITH_GMP
-		{
-		  mpq_set_si(sc->mpq_1, n1, d1);
-		  mpq_set_si(sc->mpq_2, n2, d2);
-		  mpq_sub(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		  return(mpq_to_rational(sc, sc->mpq_1));
-		}
+                {
+                  mpq_set_si(sc->mpq_1, n1, d1);
+                  mpq_set_si(sc->mpq_2, n2, d2);
+                  mpq_sub(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                  return(mpq_to_rational(sc, sc->mpq_1));
+                }
 #else
-	        {
-		  if (WITH_WARNINGS) s7_warn(sc, 128, "ratio - ratio overflow: (- %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
-		  return(make_real(sc, ((long_double)n1 / (long_double)d1) - ((long_double)n2 / (long_double)d2)));
-		}
+                {
+                  if (WITH_WARNINGS) s7_warn(sc, 128, "ratio - ratio overflow: (- %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
+                  return(make_real(sc, ((long_double)n1 / (long_double)d1) - ((long_double)n2 / (long_double)d2)));
+                }
 #endif
-	      return(make_ratio_with_div_check(sc, sc->subtract_symbol, q, d1d2));
-	    }
+              return(make_ratio_with_div_check(sc, sc->subtract_symbol, q, d1d2));
+            }
 #else
-	    return(make_ratio_with_div_check(sc, sc->subtract_symbol, n1 * d2 - n2 * d1, d1 * d2));
+            return(make_ratio_with_div_check(sc, sc->subtract_symbol, n1 * d2 - n2 * d1, d1 * d2));
 #endif
-	  }
-	case T_REAL:
-	  return(make_real(sc, fraction(x) - real(y)));
-	case T_COMPLEX:
-	  return(make_complex_not_0i(sc, fraction(x) - real_part(y), -imag_part(y)));
+          }
+        case T_REAL:
+          return(make_real(sc, fraction(x) - real(y)));
+        case T_COMPLEX:
+          return(make_complex_not_0i(sc, fraction(x) - real_part(y), -imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpq_set_z(sc->mpq_2, big_integer(y));
-	  mpq_sub(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpq_sub(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
-	  mpfr_sub(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpq_set_z(sc->mpq_2, big_integer(y));
+          mpq_sub(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpq_sub(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
+          mpfr_sub(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
+        {
+        case T_INTEGER:
 #if WITH_GMP
-	  if (s7_int_abs(integer(y)) >= INT64_TO_DOUBLE_LIMIT) /* (- .1 92233720368547758071) */
-	    {
-	      mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	      mpfr_sub_si(sc->mpfr_1, sc->mpfr_1, integer(y), MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, real(x) - (long_double)integer(y))); /* long_double saves (- 9007199254740996.0 9007199254740995): 1.0 */
-	case T_RATIO:
-	  return(make_real(sc, real(x) - fraction(y)));
-	case T_REAL:
-	  return(make_real(sc, real(x) - real(y)));
-	case T_COMPLEX:
-	  return(make_complex_not_0i(sc, real(x) - real_part(y), -imag_part(y)));
+          if (s7_int_abs(integer(y)) >= INT64_TO_DOUBLE_LIMIT) /* (- .1 92233720368547758071) */
+            {
+              mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+              mpfr_sub_si(sc->mpfr_1, sc->mpfr_1, integer(y), MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, real(x) - (long_double)integer(y))); /* long_double saves (- 9007199254740996.0 9007199254740995): 1.0 */
+        case T_RATIO:
+          return(make_real(sc, real(x) - fraction(y)));
+        case T_REAL:
+          return(make_real(sc, real(x) - real(y)));
+        case T_COMPLEX:
+          return(make_complex_not_0i(sc, real(x) - real_part(y), -imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_sub_z(sc->mpfr_1, sc->mpfr_1, big_integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_sub_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  mpfr_d_sub(sc->mpfr_1, real(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_sub_z(sc->mpfr_1, sc->mpfr_1, big_integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_sub_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          mpfr_d_sub(sc->mpfr_1, real(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
 
     case T_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(make_complex_not_0i(sc, real_part(x) - integer(y), imag_part(x)));
-	case T_RATIO:
-	  return(make_complex_not_0i(sc, real_part(x) - fraction(y), imag_part(x)));
-	case T_REAL:
-	  return(make_complex_not_0i(sc, real_part(x) - real(y), imag_part(x)));
-	case T_COMPLEX:
-	  return(make_complex(sc, real_part(x) - real_part(y), imag_part(x) - imag_part(y)));
+        {
+        case T_INTEGER:
+          return(make_complex_not_0i(sc, real_part(x) - integer(y), imag_part(x)));
+        case T_RATIO:
+          return(make_complex_not_0i(sc, real_part(x) - fraction(y), imag_part(x)));
+        case T_REAL:
+          return(make_complex_not_0i(sc, real_part(x) - real(y), imag_part(x)));
+        case T_COMPLEX:
+          return(make_complex(sc, real_part(x) - real_part(y), imag_part(x) - imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_sub_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_sub_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpz_set_si(sc->mpz_1, integer(y));
-	  mpz_sub(sc->mpz_1, big_integer(x), sc->mpz_1);
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_2, big_integer(x));
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpq_sub(sc->mpq_1, sc->mpq_2, sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  mpfr_sub_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpz_sub(sc->mpz_1, big_integer(x), big_integer(y));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_BIG_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  mpq_sub(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  mpfr_sub(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpz_set_si(sc->mpz_1, integer(y));
+          mpz_sub(sc->mpz_1, big_integer(x), sc->mpz_1);
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_RATIO:
+          mpq_set_z(sc->mpq_2, big_integer(x));
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpq_sub(sc->mpq_1, sc->mpq_2, sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          mpfr_sub_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpz_sub(sc->mpz_1, big_integer(x), big_integer(y));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_BIG_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          mpq_sub(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          mpfr_sub(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
 
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpq_set_si(sc->mpq_1, integer(y), 1);
-	  mpq_sub(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpq_sub(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  mpfr_sub_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpq_set_z(sc->mpq_1, big_integer(y));
-	  mpq_sub(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_sub(sc->mpq_1, big_ratio(x), big_ratio(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  mpfr_sub(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpq_set_si(sc->mpq_1, integer(y), 1);
+          mpq_sub(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpq_sub(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          mpfr_sub_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpq_set_z(sc->mpq_1, big_integer(y));
+          mpq_sub(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_sub(sc->mpq_1, big_ratio(x), big_ratio(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          mpfr_sub(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
 
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpfr_sub_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpfr_sub_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_sub_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_fr_sub(sc->mpc_1, big_real(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpfr_sub_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_sub_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  mpfr_sub(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_fr_sub(sc->mpc_1, big_real(x), big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpfr_sub_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpfr_sub_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_sub_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_fr_sub(sc->mpc_1, big_real(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpfr_sub_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_sub_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          mpfr_sub(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_fr_sub(sc->mpc_1, big_real(x), big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
     case T_BIG_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpc_set_si(sc->mpc_2, integer(y), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_REAL:
-	  /* if (is_NaN(real(y))) return(y); */
-	  mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
-	  mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  mpc_sub_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  mpc_sub(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpc_set_si(sc->mpc_2, integer(y), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_REAL:
+          /* if (is_NaN(real(y))) return(y); */
+          mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
+          mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
+          mpc_sub(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          mpc_sub_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          mpc_sub(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->subtract_symbol, x, y, a_number_string, 2));
+        }
 #endif
       default:
-	return(method_or_bust_pp(sc, x, sc->subtract_symbol, x, y, a_number_string, 1));
+        return(method_or_bust_pp(sc, x, sc->subtract_symbol, x, y, a_number_string, 1));
     }
 }
 
@@ -20603,353 +20603,353 @@ static s7_pointer multiply_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(multiply_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
-	case T_RATIO:
-	  return(integer_ratio_multiply_if_overflow_to_real_or_ratio(sc, integer(x), y));
-	case T_REAL:
+        {
+        case T_INTEGER:
+          return(multiply_if_overflow_to_real_or_big_integer(sc, integer(x), integer(y)));
+        case T_RATIO:
+          return(integer_ratio_multiply_if_overflow_to_real_or_ratio(sc, integer(x), y));
+        case T_REAL:
 #if WITH_GMP
-	  if (s7_int_abs(integer(x)) > QUOTIENT_INT_LIMIT)
-	    {
-	      mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
-	      mpfr_set_d(sc->mpfr_2, real(y), MPFR_RNDN);
-	      mpfr_mul(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, (long_double)integer(x) * real(y)));
-	case T_COMPLEX:
-	  return(make_complex(sc, (long_double)integer(x) * real_part(y), (long_double)integer(x) * imag_part(y)));
+          if (s7_int_abs(integer(x)) > QUOTIENT_INT_LIMIT)
+            {
+              mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
+              mpfr_set_d(sc->mpfr_2, real(y), MPFR_RNDN);
+              mpfr_mul(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, (long_double)integer(x) * real(y)));
+        case T_COMPLEX:
+          return(make_complex(sc, (long_double)integer(x) * real_part(y), (long_double)integer(x) * imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpz_mul_si(sc->mpz_1, big_integer(y), integer(x));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, integer(x), 1);
-	  mpq_mul(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_mul_si(sc->mpfr_1, big_real(y), integer(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_mul_si(sc->mpc_1, big_complex(y), integer(x), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1)); /* x might be 0 */
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpz_mul_si(sc->mpz_1, big_integer(y), integer(x));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, integer(x), 1);
+          mpq_mul(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_mul_si(sc->mpfr_1, big_real(y), integer(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_mul_si(sc->mpc_1, big_complex(y), integer(x), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1)); /* x might be 0 */
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(integer_ratio_multiply_if_overflow_to_real_or_ratio(sc, integer(y), x));
-	case T_RATIO:
-	  {
-	    s7_int d1, d2, n1, n2;
-	    parcel_out_fractions(x, y);
+        {
+        case T_INTEGER:
+          return(integer_ratio_multiply_if_overflow_to_real_or_ratio(sc, integer(y), x));
+        case T_RATIO:
+          {
+            s7_int d1, d2, n1, n2;
+            parcel_out_fractions(x, y);
 #if HAVE_OVERFLOW_CHECKS
-	    {
-	      s7_int n1n2, d1d2;
-	      if ((multiply_overflow(d1, d2, &d1d2)) ||
-		  (multiply_overflow(n1, n2, &n1n2)))
+            {
+              s7_int n1n2, d1d2;
+              if ((multiply_overflow(d1, d2, &d1d2)) ||
+                  (multiply_overflow(n1, n2, &n1n2)))
 #if WITH_GMP
-		{
-		  mpq_set_si(sc->mpq_1, n1, d1);
-		  mpq_set_si(sc->mpq_2, n2, d2);
-		  mpq_mul(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-		}
+                {
+                  mpq_set_si(sc->mpq_1, n1, d1);
+                  mpq_set_si(sc->mpq_2, n2, d2);
+                  mpq_mul(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+                }
 #else
-	        {
-		  if (WITH_WARNINGS) s7_warn(sc, 128, "ratio * ratio overflow: (* %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
-		  return(make_real(sc, fraction(x) * fraction(y)));
-		}
+                {
+                  if (WITH_WARNINGS) s7_warn(sc, 128, "ratio * ratio overflow: (* %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", n1, d1, n2, d2);
+                  return(make_real(sc, fraction(x) * fraction(y)));
+                }
 #endif
-	      return(make_ratio_with_div_check(sc, sc->multiply_symbol, n1n2, d1d2));
-	    }
+              return(make_ratio_with_div_check(sc, sc->multiply_symbol, n1n2, d1d2));
+            }
 #else
-	    return(make_ratio_with_div_check(sc, sc->multiply_symbol, n1 * n2, d1 * d2));
+            return(make_ratio_with_div_check(sc, sc->multiply_symbol, n1 * n2, d1 * d2));
 #endif
-	  }
-	case T_REAL:
+          }
+        case T_REAL:
 #if WITH_GMP
-	  if (numerator(x) > QUOTIENT_INT_LIMIT)
-	    {
-	      mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	      mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
-	      mpfr_mul_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, fraction(x) * real(y)));
-	case T_COMPLEX:
-	  return(make_complex(sc, fraction(x) * real_part(y), fraction(x) * imag_part(y)));
+          if (numerator(x) > QUOTIENT_INT_LIMIT)
+            {
+              mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+              mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
+              mpfr_mul_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, fraction(x) * real(y)));
+        case T_COMPLEX:
+          return(make_complex(sc, fraction(x) * real_part(y), fraction(x) * imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpq_set_z(sc->mpq_2, big_integer(y));
-	  mpq_mul(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpq_mul(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpfr_mul_q(sc->mpfr_1, big_real(y), sc->mpq_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpq_set_z(sc->mpq_2, big_integer(y));
+          mpq_mul(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpq_mul(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpfr_mul_q(sc->mpfr_1, big_real(y), sc->mpq_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
+        {
+        case T_INTEGER:
 #if WITH_GMP
-	  if (s7_int_abs(integer(y)) > QUOTIENT_INT_LIMIT)
-	    {
-	      mpfr_set_si(sc->mpfr_1, integer(y), MPFR_RNDN);
-	      mpfr_set_d(sc->mpfr_2, real(x), MPFR_RNDN);
-	      mpfr_mul(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, real(x) * (long_double)integer(y)));
-	case T_RATIO:
+          if (s7_int_abs(integer(y)) > QUOTIENT_INT_LIMIT)
+            {
+              mpfr_set_si(sc->mpfr_1, integer(y), MPFR_RNDN);
+              mpfr_set_d(sc->mpfr_2, real(x), MPFR_RNDN);
+              mpfr_mul(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, real(x) * (long_double)integer(y)));
+        case T_RATIO:
 #if WITH_GMP
-	  if (numerator(y) > QUOTIENT_INT_LIMIT)
-	    {
-	      mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	      mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
-	      mpfr_mul_d(sc->mpfr_1, sc->mpfr_1, real(x), MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, fraction(y) * real(x)));
-	case T_REAL:
-	  return(make_real(sc, real(x) * real(y)));
-	case T_COMPLEX:
-	  return(make_complex(sc, real(x) * real_part(y), real(x) * imag_part(y)));
+          if (numerator(y) > QUOTIENT_INT_LIMIT)
+            {
+              mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+              mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
+              mpfr_mul_d(sc->mpfr_1, sc->mpfr_1, real(x), MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, fraction(y) * real(x)));
+        case T_REAL:
+          return(make_real(sc, real(x) * real(y)));
+        case T_COMPLEX:
+          return(make_complex(sc, real(x) * real_part(y), real(x) * imag_part(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_mul_z(sc->mpfr_1, sc->mpfr_1, big_integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_mul_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  mpfr_mul_d(sc->mpfr_1, big_real(y), real(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1)); /* x might = 0.0 */
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_mul_z(sc->mpfr_1, sc->mpfr_1, big_integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_mul_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          mpfr_mul_d(sc->mpfr_1, big_real(y), real(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1)); /* x might = 0.0 */
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
 
     case T_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(make_complex(sc, real_part(x) * integer(y), imag_part(x) * integer(y)));
-	case T_RATIO:
-	  return(make_complex(sc, real_part(x) * fraction(y), imag_part(x) * fraction(y)));
-	case T_REAL:
-	  return(make_complex(sc, real_part(x) * real(y), imag_part(x) * real(y)));
-	case T_COMPLEX:
-	  {
-	    s7_double r1 = real_part(x), r2 = real_part(y), i1 = imag_part(x), i2 = imag_part(y);
-	    return(make_complex(sc, r1 * r2 - i1 * i2, r1 * i2 + r2 * i1));
-	  }
+        {
+        case T_INTEGER:
+          return(make_complex(sc, real_part(x) * integer(y), imag_part(x) * integer(y)));
+        case T_RATIO:
+          return(make_complex(sc, real_part(x) * fraction(y), imag_part(x) * fraction(y)));
+        case T_REAL:
+          return(make_complex(sc, real_part(x) * real(y), imag_part(x) * real(y)));
+        case T_COMPLEX:
+          {
+            s7_double r1 = real_part(x), r2 = real_part(y), i1 = imag_part(x), i2 = imag_part(y);
+            return(make_complex(sc, r1 * r2 - i1 * i2, r1 * i2 + r2 * i1));
+          }
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_mul_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_mul_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpz_mul_si(sc->mpz_1, big_integer(x), integer(y));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_2, big_integer(x));
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpq_mul(sc->mpq_1, sc->mpq_2, sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
-	  mpfr_mul_z(sc->mpfr_1, sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpz_mul(sc->mpz_1, big_integer(x), big_integer(y));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	case T_BIG_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  mpq_mul(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_mul_z(sc->mpfr_1, big_real(y), big_integer(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpz_mul_si(sc->mpz_1, big_integer(x), integer(y));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_RATIO:
+          mpq_set_z(sc->mpq_2, big_integer(x));
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpq_mul(sc->mpq_1, sc->mpq_2, sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
+          mpfr_mul_z(sc->mpfr_1, sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpz_mul(sc->mpz_1, big_integer(x), big_integer(y));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        case T_BIG_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          mpq_mul(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_mul_z(sc->mpfr_1, big_real(y), big_integer(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
 
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpq_set_si(sc->mpq_1, integer(y), 1);
-	  mpq_mul(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpq_mul(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
-	  mpfr_mul_q(sc->mpfr_1, sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpq_set_z(sc->mpq_1, big_integer(y));
-	  mpq_mul(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_mul(sc->mpq_1, big_ratio(x), big_ratio(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  mpfr_mul_q(sc->mpfr_1, big_real(y), big_ratio(x), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpq_set_si(sc->mpq_1, integer(y), 1);
+          mpq_mul(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpq_mul(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
+          mpfr_mul_q(sc->mpfr_1, sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpq_set_z(sc->mpq_1, big_integer(y));
+          mpq_mul(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_mul(sc->mpq_1, big_ratio(x), big_ratio(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          mpfr_mul_q(sc->mpfr_1, big_real(y), big_ratio(x), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
 
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpfr_mul_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpfr_mul_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_mul_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_mul_fr(sc->mpc_1, sc->mpc_1, big_real(x), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpfr_mul_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_mul_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  mpfr_mul(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  mpc_mul_fr(sc->mpc_1, big_complex(y), big_real(x), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1)); /* 0.0? */
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpfr_mul_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpfr_mul_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_mul_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_mul_fr(sc->mpc_1, sc->mpc_1, big_real(x), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpfr_mul_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_mul_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          mpfr_mul(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          mpc_mul_fr(sc->mpc_1, big_complex(y), big_real(x), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1)); /* 0.0? */
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
     case T_BIG_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  mpc_mul_si(sc->mpc_1, big_complex(x), integer(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_REAL:
-	  /* if (is_NaN(real(y))) return(y); */
-	  mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_COMPLEX:
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
-	  mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  mpc_mul_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  mpc_mul(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          mpc_mul_si(sc->mpc_1, big_complex(x), integer(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_REAL:
+          /* if (is_NaN(real(y))) return(y); */
+          mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
+          mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_COMPLEX:
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
+          mpc_mul(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          mpc_mul_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          mpc_mul(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->multiply_symbol, x, y, a_number_string, 2));
+        }
 #endif
       default:
-	return(method_or_bust_pp(sc, x, sc->multiply_symbol, x, y, a_number_string, 1));
+        return(method_or_bust_pp(sc, x, sc->multiply_symbol, x, y, a_number_string, 1));
     }
 }
 
@@ -20987,7 +20987,7 @@ static s7_pointer g_multiply(s7_scheme *sc, s7_pointer args)
   if (is_null(p))
     {
       if (!is_number(x))
-	return(multiply_method_or_bust(sc, x, args, a_number_string, 0));
+        return(multiply_method_or_bust(sc, x, args, a_number_string, 0));
       return(x);
     }
   for (sc->error_argnum = 0; is_pair(p); p = cdr(p), sc->error_argnum++)
@@ -21151,8 +21151,8 @@ static s7_pointer multiply_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7
 {
   if (args != 2) return(f);
   return(chooser_check_arg_types(sc, cadr(expr), caddr(expr), sc->multiply_2,
-				 sc->mul_2_ff, sc->mul_2_ii, sc->mul_2_if, sc->mul_2_fi,
-				 sc->mul_2_xi, sc->mul_2_ix, sc->mul_2_fx, sc->mul_2_xf));
+                                 sc->mul_2_ff, sc->mul_2_ii, sc->mul_2_if, sc->mul_2_fi,
+                                 sc->mul_2_xi, sc->mul_2_ix, sc->mul_2_fx, sc->mul_2_xf));
 }
 
 
@@ -21175,26 +21175,26 @@ static s7_pointer invert_p_p(s7_scheme *sc, s7_pointer p)
     case T_INTEGER:
 #if WITH_GMP && (!POINTER_32)
       if (integer(p) == S7_INT64_MIN) /* (/ 1 (*s7* 'most-negative-fixnum)) -> -1/9223372036854775808 */
-	{
-	  new_cell(sc, x, T_BIG_RATIO);
-	  big_ratio_bgr(x) = alloc_bigrat(sc);
-	  add_big_ratio(sc, x);
-	  mpz_set_si(sc->mpz_1, S7_INT64_MAX);
-	  mpz_set_si(sc->mpz_2, 1);
-	  mpz_add(sc->mpz_1, sc->mpz_1, sc->mpz_2);
-	  mpq_set_si(big_ratio(x), -1, 1);
-	  mpq_set_den(big_ratio(x), sc->mpz_1); /* geez... */
-	  return(x);
-	}
+        {
+          new_cell(sc, x, T_BIG_RATIO);
+          big_ratio_bgr(x) = alloc_bigrat(sc);
+          add_big_ratio(sc, x);
+          mpz_set_si(sc->mpz_1, S7_INT64_MAX);
+          mpz_set_si(sc->mpz_2, 1);
+          mpz_add(sc->mpz_1, sc->mpz_1, sc->mpz_2);
+          mpq_set_si(big_ratio(x), -1, 1);
+          mpq_set_den(big_ratio(x), sc->mpz_1); /* geez... */
+          return(x);
+        }
 #endif
       if (integer(p) == 0)
-	division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
+        division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
       return(make_simple_ratio(sc, 1, integer(p)));  /* this checks for int */
     case T_RATIO:
       return(make_simple_ratio(sc, denominator(p), numerator(p)));
     case T_REAL:
       if (real(p) == 0.0)
-	division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
+        division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
       return(make_real(sc, 1.0 / real(p)));
     case T_COMPLEX:
       return(complex_invert(sc, p));
@@ -21202,9 +21202,9 @@ static s7_pointer invert_p_p(s7_scheme *sc, s7_pointer p)
 #if WITH_GMP
     case T_BIG_INTEGER:
       if (mpz_cmp_ui(big_integer(p), 0) == 0)
-	division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
+        division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
       if ((mpz_cmp_ui(big_integer(p), 1) == 0) || (mpz_cmp_si(big_integer(p), -1) == 0))
-	return(p);
+        return(p);
       new_cell(sc, x, T_BIG_RATIO);
       big_ratio_bgr(x) = alloc_bigrat(sc);
       add_big_ratio(sc, x);
@@ -21215,12 +21215,12 @@ static s7_pointer invert_p_p(s7_scheme *sc, s7_pointer p)
 
     case T_BIG_RATIO:
       if (mpz_cmp_ui(mpq_numref(big_ratio(p)), 1) == 0)
-	return(mpz_to_integer(sc, mpq_denref(big_ratio(p))));
+        return(mpz_to_integer(sc, mpq_denref(big_ratio(p))));
       if (mpz_cmp_si(mpq_numref(big_ratio(p)), -1) == 0)
-	{
-	  mpz_neg(sc->mpz_1, mpq_denref(big_ratio(p)));
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	}
+        {
+          mpz_neg(sc->mpz_1, mpq_denref(big_ratio(p)));
+          return(mpz_to_integer(sc, sc->mpz_1));
+        }
       new_cell(sc, x, T_BIG_RATIO);
       big_ratio_bgr(x) = alloc_bigrat(sc);
       add_big_ratio(sc, x);
@@ -21230,14 +21230,14 @@ static s7_pointer invert_p_p(s7_scheme *sc, s7_pointer p)
 
     case T_BIG_REAL:
       if (mpfr_zero_p(big_real(p)))
-	division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
+        division_by_zero_error_1_nr(sc, sc->divide_symbol, p);
       x = mpfr_to_big_real(sc, big_real(p));
       mpfr_ui_div(big_real(x), 1, big_real(x), MPFR_RNDN);
       return(x);
 
     case T_BIG_COMPLEX:
       if ((!mpfr_number_p(mpc_realref(big_complex(p)))) || (!mpfr_number_p(mpc_imagref(big_complex(p)))))
-	return(complex_NaN);
+        return(complex_NaN);
       mpc_ui_div(sc->mpc_1, 1, big_complex(p), MPC_RNDNN);
       return(mpc_to_number(sc, sc->mpc_1)); /* x might be 0+0i if real-part is inf? */
 #endif
@@ -21255,540 +21255,540 @@ static s7_pointer divide_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	  /* -------- integer x -------- */
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  if (integer(x) == 1)  /* mainly to handle (/ 1 -9223372036854775808) correctly! */
-	    return(invert_p_p(sc, y));
-	  return(make_ratio(sc, integer(x), integer(y)));
-
-	case T_RATIO:
+        {
+          /* -------- integer x -------- */
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          if (integer(x) == 1)  /* mainly to handle (/ 1 -9223372036854775808) correctly! */
+            return(invert_p_p(sc, y));
+          return(make_ratio(sc, integer(x), integer(y)));
+
+        case T_RATIO:
 #if HAVE_OVERFLOW_CHECKS
-	  {
-	    s7_int dn;
-	    if (multiply_overflow(integer(x), denominator(y), &dn))
+          {
+            s7_int dn;
+            if (multiply_overflow(integer(x), denominator(y), &dn))
 #if WITH_GMP
-	      {
-		mpq_set_si(sc->mpq_1, integer(x), 1);
-		mpq_set_si(sc->mpq_2, numerator(y), denominator(y));
-		mpq_div(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	      }
+              {
+                mpq_set_si(sc->mpq_1, integer(x), 1);
+                mpq_set_si(sc->mpq_2, numerator(y), denominator(y));
+                mpq_div(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+              }
 #else
               {
-		if (WITH_WARNINGS) s7_warn(sc, 128, "integer / ratio overflow: (/ %" ld64 " %" ld64 "/%" ld64 ")\n", integer(x), numerator(y), denominator(y));
-  	        return(make_real(sc, integer(x) * inverted_fraction(y)));
-	      }
+                if (WITH_WARNINGS) s7_warn(sc, 128, "integer / ratio overflow: (/ %" ld64 " %" ld64 "/%" ld64 ")\n", integer(x), numerator(y), denominator(y));
+                  return(make_real(sc, integer(x) * inverted_fraction(y)));
+              }
 #endif
-	    return(make_ratio_with_div_check(sc, sc->divide_symbol, dn, numerator(y)));
-	  }
+            return(make_ratio_with_div_check(sc, sc->divide_symbol, dn, numerator(y)));
+          }
 #else
-	  return(make_ratio_with_div_check(sc, sc->divide_symbol, integer(x) * denominator(y), numerator(y)));
+          return(make_ratio_with_div_check(sc, sc->divide_symbol, integer(x) * denominator(y), numerator(y)));
 #endif
 
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  if (is_inf(real(y))) return(real_zero);
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          if (is_inf(real(y))) return(real_zero);
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
 #if WITH_GMP
-	  if ((s7_int_abs(integer(x))) > QUOTIENT_INT_LIMIT)
-	    {
-	      mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
-	      mpfr_set_d(sc->mpfr_2, real(y), MPFR_RNDN);
-	      mpfr_div(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
-	      return(mpfr_to_big_real(sc, sc->mpfr_1));
-	    }
-#endif
-	  return(make_real(sc, (s7_double)(integer(x)) / real(y)));
-
-	case T_COMPLEX:
-	  {
-	    s7_double den, r1 = (s7_double)integer(x), r2 = real_part(y), i2 = imag_part(y);
-	    den = 1.0 / (r2 * r2 + i2 * i2);
-	    /* we could avoid the squaring (see Knuth II p613 16), not a big deal: (/ 1.0e308+1.0e308i 2.0e308+2.0e308i) => nan, (gmp case is ok here) */
-	    return(make_complex(sc, r1 * r2 * den, -(r1 * i2 * den)));
-	  }
+          if ((s7_int_abs(integer(x))) > QUOTIENT_INT_LIMIT)
+            {
+              mpfr_set_si(sc->mpfr_1, integer(x), MPFR_RNDN);
+              mpfr_set_d(sc->mpfr_2, real(y), MPFR_RNDN);
+              mpfr_div(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
+              return(mpfr_to_big_real(sc, sc->mpfr_1));
+            }
+#endif
+          return(make_real(sc, (s7_double)(integer(x)) / real(y)));
+
+        case T_COMPLEX:
+          {
+            s7_double den, r1 = (s7_double)integer(x), r2 = real_part(y), i2 = imag_part(y);
+            den = 1.0 / (r2 * r2 + i2 * i2);
+            /* we could avoid the squaring (see Knuth II p613 16), not a big deal: (/ 1.0e308+1.0e308i 2.0e308+2.0e308i) => nan, (gmp case is ok here) */
+            return(make_complex(sc, r1 * r2 * den, -(r1 * i2 * den)));
+          }
 
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpq_set_si(sc->mpq_1, integer(x), 1);
-	  mpq_set_den(sc->mpq_1, big_integer(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, integer(x), 1);
-	  mpq_div(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_si_div(sc->mpfr_1, integer(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpc_set_si(sc->mpc_1, integer(x), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1)); /* x might be 0? */
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpq_set_si(sc->mpq_1, integer(x), 1);
+          mpq_set_den(sc->mpq_1, big_integer(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, integer(x), 1);
+          mpq_div(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_si_div(sc->mpfr_1, integer(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpc_set_si(sc->mpc_1, integer(x), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1)); /* x might be 0? */
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
       break;
 
       /* -------- ratio x -------- */
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
 #if HAVE_OVERFLOW_CHECKS
-	  {
-	    s7_int dn;
-	    if (multiply_overflow(denominator(x), integer(y), &dn))
+          {
+            s7_int dn;
+            if (multiply_overflow(denominator(x), integer(y), &dn))
 #if WITH_GMP
-	      {
-		mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-		mpq_set_si(sc->mpq_2, integer(y), 1);
-		mpq_div(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		return(mpq_to_rational(sc, sc->mpq_1));
-	      }
+              {
+                mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+                mpq_set_si(sc->mpq_2, integer(y), 1);
+                mpq_div(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                return(mpq_to_rational(sc, sc->mpq_1));
+              }
 #else
               {
-		if (WITH_WARNINGS)
-		  s7_warn(sc, 128, "ratio / integer overflow: (/ %" ld64 "/%" ld64 " %" ld64 ")\n", numerator(x), denominator(x), integer(y));
-	        return(make_real(sc, (long_double)numerator(x) / ((long_double)denominator(x) * (long_double)integer(y))));
-	      }
+                if (WITH_WARNINGS)
+                  s7_warn(sc, 128, "ratio / integer overflow: (/ %" ld64 "/%" ld64 " %" ld64 ")\n", numerator(x), denominator(x), integer(y));
+                return(make_real(sc, (long_double)numerator(x) / ((long_double)denominator(x) * (long_double)integer(y))));
+              }
 #endif
-	    return(make_ratio_with_div_check(sc, sc->divide_symbol, numerator(x), dn));
-	  }
+            return(make_ratio_with_div_check(sc, sc->divide_symbol, numerator(x), dn));
+          }
 #else
-	  return(make_ratio_with_div_check(sc, sc->divide_symbol, numerator(x), denominator(x) * integer(y)));
+          return(make_ratio_with_div_check(sc, sc->divide_symbol, numerator(x), denominator(x) * integer(y)));
 #endif
 
-	case T_RATIO:
-	  {
-	    s7_int d1, d2, n1, n2;
-	    parcel_out_fractions(x, y);
-	    if (d1 == d2)
-	      return(make_ratio_with_div_check(sc, sc->divide_symbol, n1, n2));
+        case T_RATIO:
+          {
+            s7_int d1, d2, n1, n2;
+            parcel_out_fractions(x, y);
+            if (d1 == d2)
+              return(make_ratio_with_div_check(sc, sc->divide_symbol, n1, n2));
 #if HAVE_OVERFLOW_CHECKS
-	    if ((multiply_overflow(n1, d2, &n1)) ||
-		(multiply_overflow(n2, d1, &d1)))
-	      {
+            if ((multiply_overflow(n1, d2, &n1)) ||
+                (multiply_overflow(n2, d1, &d1)))
+              {
 #if WITH_GMP
-		mpq_set_si(sc->mpq_1, numerator(x), denominator(x)); /* not n1 and d1! they are garbage here */
-		mpq_set_si(sc->mpq_2, n2, d2);
-		mpq_div(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		return(mpq_to_rational(sc, sc->mpq_1));
+                mpq_set_si(sc->mpq_1, numerator(x), denominator(x)); /* not n1 and d1! they are garbage here */
+                mpq_set_si(sc->mpq_2, n2, d2);
+                mpq_div(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                return(mpq_to_rational(sc, sc->mpq_1));
 #else
-		s7_double r1, r2;
-		if (WITH_WARNINGS)
-		  s7_warn(sc, 128, "ratio / ratio overflow: (/ %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", numerator(x), denominator(x), numerator(y), denominator(y));
-		r1 = fraction(x);
-		r2 = inverted_fraction(y);
-		return(make_real(sc, r1 * r2));
-#endif
-	      }
-	    return(make_ratio_with_div_check(sc, sc->divide_symbol, n1, d1));
+                s7_double r1, r2;
+                if (WITH_WARNINGS)
+                  s7_warn(sc, 128, "ratio / ratio overflow: (/ %" ld64 "/%" ld64 " %" ld64 "/%" ld64 ")\n", numerator(x), denominator(x), numerator(y), denominator(y));
+                r1 = fraction(x);
+                r2 = inverted_fraction(y);
+                return(make_real(sc, r1 * r2));
+#endif
+              }
+            return(make_ratio_with_div_check(sc, sc->divide_symbol, n1, d1));
 #else
-	    return(make_ratio_with_div_check(sc, sc->divide_symbol, n1 * d2, n2 * d1));
+            return(make_ratio_with_div_check(sc, sc->divide_symbol, n1 * d2, n2 * d1));
 #endif
-	  }
+          }
 
-	case T_REAL:
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  return(make_real(sc, fraction(x) / real(y)));
+        case T_REAL:
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          return(make_real(sc, fraction(x) / real(y)));
 
-	case T_COMPLEX:
-	  {
-	    s7_double rx = fraction(x), r2 = real_part(y), i2 = imag_part(y);
-	    s7_double den = 1.0 / (r2 * r2 + i2 * i2);
-	    return(make_complex(sc, rx * r2 * den, -rx * i2 * den)); /* not unchecked: (/ 3/4 -inf.0+i) */
-	  }
+        case T_COMPLEX:
+          {
+            s7_double rx = fraction(x), r2 = real_part(y), i2 = imag_part(y);
+            s7_double den = 1.0 / (r2 * r2 + i2 * i2);
+            return(make_complex(sc, rx * r2 * den, -rx * i2 * den)); /* not unchecked: (/ 3/4 -inf.0+i) */
+          }
 
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpq_set_z(sc->mpq_1, big_integer(y));
-	  mpq_set_si(sc->mpq_2, numerator(x), denominator(x));
-	  mpq_div(sc->mpq_1, sc->mpq_2, sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpq_div(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
-	  mpfr_div(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpq_set_z(sc->mpq_1, big_integer(y));
+          mpq_set_si(sc->mpq_2, numerator(x), denominator(x));
+          mpq_div(sc->mpq_1, sc->mpq_2, sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpq_div(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpfr_set_q(sc->mpfr_1, sc->mpq_1, MPFR_RNDN);
+          mpfr_div(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
 
       /* -------- real x -------- */
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  if (is_NaN(real(x))) return(x); /* what is (/ +nan.0 0)? */
-	  if (is_inf(real(x)))
-	    return((real(x) > 0.0) ? ((integer(y) > 0) ? real_infinity : real_minus_infinity) : ((integer(y) > 0) ? real_minus_infinity : real_infinity));
-	  return(make_real(sc, (long_double)real(x) / (long_double)integer(y)));
-
-	case T_RATIO:
-	  if (is_NaN(real(x))) return(x);
-	  if (is_inf(real(x)))
-	    return((real(x) > 0) ? ((numerator(y) > 0) ? real_infinity : real_minus_infinity) : ((numerator(y) > 0) ? real_minus_infinity : real_infinity));
-	  return(make_real(sc, real(x) * inverted_fraction(y)));
-
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  if (is_NaN(real(x))) return(x);
-	  if (is_inf(real(y)))
-	    return((is_inf(real(x))) ? real_NaN : real_zero);
-	  return(make_real(sc, real(x) / real(y)));
-
-	case T_COMPLEX:
-	  {
-	    s7_double den, r2, i2;
-	    if (is_NaN(real(x))) return(complex_NaN);
-	    r2 = real_part(y);
-	    i2 = imag_part(y);
-	    if ((is_NaN(r2)) || (is_inf(r2))) return(complex_NaN);
-	    if ((is_NaN(i2)) || (is_inf(i2))) return(complex_NaN);
-	    den = 1.0 / (r2 * r2 + i2 * i2);
-	    return(make_complex(sc, real(x) * r2 * den, -real(x) * i2 * den));
-	  }
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          if (is_NaN(real(x))) return(x); /* what is (/ +nan.0 0)? */
+          if (is_inf(real(x)))
+            return((real(x) > 0.0) ? ((integer(y) > 0) ? real_infinity : real_minus_infinity) : ((integer(y) > 0) ? real_minus_infinity : real_infinity));
+          return(make_real(sc, (long_double)real(x) / (long_double)integer(y)));
+
+        case T_RATIO:
+          if (is_NaN(real(x))) return(x);
+          if (is_inf(real(x)))
+            return((real(x) > 0) ? ((numerator(y) > 0) ? real_infinity : real_minus_infinity) : ((numerator(y) > 0) ? real_minus_infinity : real_infinity));
+          return(make_real(sc, real(x) * inverted_fraction(y)));
+
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          if (is_NaN(real(x))) return(x);
+          if (is_inf(real(y)))
+            return((is_inf(real(x))) ? real_NaN : real_zero);
+          return(make_real(sc, real(x) / real(y)));
+
+        case T_COMPLEX:
+          {
+            s7_double den, r2, i2;
+            if (is_NaN(real(x))) return(complex_NaN);
+            r2 = real_part(y);
+            i2 = imag_part(y);
+            if ((is_NaN(r2)) || (is_inf(r2))) return(complex_NaN);
+            if ((is_NaN(i2)) || (is_inf(i2))) return(complex_NaN);
+            den = 1.0 / (r2 * r2 + i2 * i2);
+            return(make_complex(sc, real(x) * r2 * den, -real(x) * i2 * den));
+          }
 
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_set_z(sc->mpfr_1, big_integer(y), MPFR_RNDN);
-	  mpfr_d_div(sc->mpfr_1, real(x), sc->mpfr_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  mpfr_div_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_d_div(sc->mpfr_1, real(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  if ((is_NaN(real(x))) || (!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_set_z(sc->mpfr_1, big_integer(y), MPFR_RNDN);
+          mpfr_d_div(sc->mpfr_1, real(x), sc->mpfr_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          mpfr_div_q(sc->mpfr_1, sc->mpfr_1, big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_d_div(sc->mpfr_1, real(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          if ((is_NaN(real(x))) || (!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpc_set_d_d(sc->mpc_1, real(x), 0.0, MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
 
       /* -------- complex x -------- */
     case T_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  {
-	    s7_double r1;
-	    if (integer(y) == 0)
-	      division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	    r1 = (long_double)1.0 / (long_double)integer(y);
-	    return(make_complex(sc, real_part(x) * r1, imag_part(x) * r1));
-	  }
-
-	case T_RATIO:
-	  {
-	    s7_double frac = inverted_fraction(y);
-	    return(make_complex(sc, real_part(x) * frac, imag_part(x) * frac));
-	  }
-
-	case T_REAL:
-	  {
-	    s7_double r1;
-	    if (real(y) == 0.0)
-	      division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	    r1 = 1.0 / real(y);
-	    return(make_complex(sc, real_part(x) * r1, imag_part(x) * r1)); /* (/ 0.0+1.0i +inf.0) */
-	  }
-
-	case T_COMPLEX:
-	  {
-	    s7_double r1 = real_part(x), r2, i1, i2, den;
-	    if (is_NaN(r1)) return(x);
-	    i1 = imag_part(x);
-	    if (is_NaN(i1)) return(x);
-	    r2 = real_part(y);
-	    if (is_NaN(r2)) return(y);
-	    if (is_inf(r2)) return(complex_NaN);
-	    i2 = imag_part(y);
-	    if (is_NaN(i2)) return(y);
-	    den = 1.0 / (r2 * r2 + i2 * i2);
-	    return(make_complex(sc, (r1 * r2 + i1 * i2) * den, (r2 * i1 - r1 * i2) * den));
-	  }
+        {
+        case T_INTEGER:
+          {
+            s7_double r1;
+            if (integer(y) == 0)
+              division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+            r1 = (long_double)1.0 / (long_double)integer(y);
+            return(make_complex(sc, real_part(x) * r1, imag_part(x) * r1));
+          }
+
+        case T_RATIO:
+          {
+            s7_double frac = inverted_fraction(y);
+            return(make_complex(sc, real_part(x) * frac, imag_part(x) * frac));
+          }
+
+        case T_REAL:
+          {
+            s7_double r1;
+            if (real(y) == 0.0)
+              division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+            r1 = 1.0 / real(y);
+            return(make_complex(sc, real_part(x) * r1, imag_part(x) * r1)); /* (/ 0.0+1.0i +inf.0) */
+          }
+
+        case T_COMPLEX:
+          {
+            s7_double r1 = real_part(x), r2, i1, i2, den;
+            if (is_NaN(r1)) return(x);
+            i1 = imag_part(x);
+            if (is_NaN(i1)) return(x);
+            r2 = real_part(y);
+            if (is_NaN(r2)) return(y);
+            if (is_inf(r2)) return(complex_NaN);
+            i2 = imag_part(y);
+            if (is_NaN(i2)) return(y);
+            den = 1.0 / (r2 * r2 + i2 * i2);
+            return(make_complex(sc, (r1 * r2 + i1 * i2) * den, (r2 * i1 - r1 * i2) * den));
+          }
 
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_div_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-#endif
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(y), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_set_q(sc->mpc_2, big_ratio(y), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_div_fr(sc->mpc_1, sc->mpc_1, big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+#endif
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpz_set_si(sc->mpz_1, integer(y));
-	  mpq_set_num(sc->mpq_1, big_integer(x));
-	  mpq_set_den(sc->mpq_1, sc->mpz_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_2, big_integer(x));
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y)); /* can't invert here, mpq den=unsigned */
-	  mpq_div(sc->mpq_1, sc->mpq_2, sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  mpfr_div_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
-	      (is_inf(real_part(y))) || (is_inf(imag_part(y))))
-	    return(complex_NaN);
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpq_set_num(sc->mpq_1, big_integer(x));
-	  mpq_set_den(sc->mpq_1, big_integer(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, 0, 1);
-	  mpq_set_num(sc->mpq_1, big_integer(x));
-	  mpq_div(sc->mpq_1, sc->mpq_1, big_ratio(y));
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  mpfr_div(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpz_set_si(sc->mpz_1, integer(y));
+          mpq_set_num(sc->mpq_1, big_integer(x));
+          mpq_set_den(sc->mpq_1, sc->mpz_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_RATIO:
+          mpq_set_z(sc->mpq_2, big_integer(x));
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y)); /* can't invert here, mpq den=unsigned */
+          mpq_div(sc->mpq_1, sc->mpq_2, sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          mpfr_div_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
+              (is_inf(real_part(y))) || (is_inf(imag_part(y))))
+            return(complex_NaN);
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_set_z(sc->mpc_2, big_integer(x), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_2, sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpq_set_num(sc->mpq_1, big_integer(x));
+          mpq_set_den(sc->mpq_1, big_integer(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, 0, 1);
+          mpq_set_num(sc->mpq_1, big_integer(x));
+          mpq_div(sc->mpq_1, sc->mpq_1, big_ratio(y));
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          mpfr_div(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpc_set_z(sc->mpc_1, big_integer(x), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpq_set_si(sc->mpq_1, integer(y), 1);
-	  mpq_div(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpq_div(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_rational(sc, sc->mpq_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  mpfr_div_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
-	      (is_inf(real_part(y))) || (is_inf(imag_part(y))))
-	    return(complex_NaN);
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpq_set_z(sc->mpq_1, big_integer(y));
-	  mpq_div(sc->mpq_1, big_ratio(x), sc->mpq_1);
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_RATIO:
-	  mpq_div(sc->mpq_1, big_ratio(x), big_ratio(y));
-	  return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  mpfr_div(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpq_set_si(sc->mpq_1, integer(y), 1);
+          mpq_div(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpq_div(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_rational(sc, sc->mpq_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          mpfr_div_d(sc->mpfr_1, sc->mpfr_1, real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
+              (is_inf(real_part(y))) || (is_inf(imag_part(y))))
+            return(complex_NaN);
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_set_d_d(sc->mpc_2, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, sc->mpc_2, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpq_set_z(sc->mpq_1, big_integer(y));
+          mpq_div(sc->mpq_1, big_ratio(x), sc->mpq_1);
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_RATIO:
+          mpq_div(sc->mpq_1, big_ratio(x), big_ratio(y));
+          return(mpq_to_canonicalized_rational(sc, sc->mpq_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          mpfr_div(sc->mpfr_1, sc->mpfr_1, big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpc_set_q(sc->mpc_1, big_ratio(x), MPC_RNDNN);
+          mpc_div(sc->mpc_1, sc->mpc_1, big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_div_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpfr_div_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_div_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_COMPLEX:
-	  if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
-	      (is_inf(real_part(y))) || (is_inf(imag_part(y))))
-	    return(complex_NaN);
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_fr_div(sc->mpc_1, big_real(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_div_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_RATIO:
-	  mpfr_div_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpfr_div(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	case T_BIG_COMPLEX:
-	  if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpc_fr_div(sc->mpc_1, big_real(x), big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_div_si(sc->mpfr_1, big_real(x), integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpfr_div_q(sc->mpfr_1, big_real(x), sc->mpq_1, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_div_d(sc->mpfr_1, big_real(x), real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_COMPLEX:
+          if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
+              (is_inf(real_part(y))) || (is_inf(imag_part(y))))
+            return(complex_NaN);
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_fr_div(sc->mpc_1, big_real(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_div_z(sc->mpfr_1, big_real(x), big_integer(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_RATIO:
+          mpfr_div_q(sc->mpfr_1, big_real(x), big_ratio(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpfr_div(sc->mpfr_1, big_real(x), big_real(y), MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        case T_BIG_COMPLEX:
+          if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpc_fr_div(sc->mpc_1, big_real(x), big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
     case T_BIG_COMPLEX:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpc_set_si(sc->mpc_1, integer(y), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
-	  mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_REAL:
-	  /* if (is_NaN(real(y))) return(y); */
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
-	  mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_COMPLEX:
-	  if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
-	      (is_inf(real_part(y))) || (is_inf(imag_part(y))))
-	    return(complex_NaN);
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_INTEGER:
-	  if (mpz_cmp_ui(big_integer(y), 0) == 0)
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_RATIO:
-	  mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
-	  mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_REAL:
-	  if (mpfr_zero_p(big_real(y)))
-	    division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
-	  mpc_div_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	case T_BIG_COMPLEX:
-	  if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
-	    return(complex_NaN);
-	  mpc_div(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
-	  return(mpc_to_number(sc, sc->mpc_1));
-	default:
-	  return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
-	}
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpc_set_si(sc->mpc_1, integer(y), MPC_RNDNN);
+          mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          mpc_set_q(sc->mpc_1, sc->mpq_1, MPC_RNDNN);
+          mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_REAL:
+          /* if (is_NaN(real(y))) return(y); */
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpc_set_d_d(sc->mpc_1, real(y), 0.0, MPC_RNDNN);
+          mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_COMPLEX:
+          if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
+              (is_inf(real_part(y))) || (is_inf(imag_part(y))))
+            return(complex_NaN);
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_INTEGER:
+          if (mpz_cmp_ui(big_integer(y), 0) == 0)
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpc_set_z(sc->mpc_1, big_integer(y), MPC_RNDNN);
+          mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_RATIO:
+          mpc_set_q(sc->mpc_1, big_ratio(y), MPC_RNDNN);
+          mpc_div(sc->mpc_1, big_complex(x), sc->mpc_1, MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_REAL:
+          if (mpfr_zero_p(big_real(y)))
+            division_by_zero_error_2_nr(sc, sc->divide_symbol, x, y);
+          mpc_div_fr(sc->mpc_1, big_complex(x), big_real(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        case T_BIG_COMPLEX:
+          if ((!mpfr_number_p(mpc_realref(big_complex(y)))) || (!mpfr_number_p(mpc_imagref(big_complex(y)))))
+            return(complex_NaN);
+          mpc_div(sc->mpc_1, big_complex(x), big_complex(y), MPC_RNDNN);
+          return(mpc_to_number(sc, sc->mpc_1));
+        default:
+          return(method_or_bust_with_type_and_loc_pp(sc, y, sc->divide_symbol, x, y, a_number_string, 2));
+        }
 #endif
 
     default: /* x is not a built-in number */
@@ -21806,7 +21806,7 @@ static s7_pointer g_divide(s7_scheme *sc, s7_pointer args)
   if (is_null(p))            /* (/ x) */
     {
       if (!is_number(x))
-	return(method_or_bust_p(sc, x, sc->divide_symbol, a_number_string));
+        return(method_or_bust_p(sc, x, sc->divide_symbol, a_number_string));
       return(invert_p_p(sc, x));
     }
   for (sc->error_argnum = 0; is_pair(p); p = cdr(p), sc->error_argnum++)
@@ -21826,13 +21826,13 @@ static s7_pointer g_divide_by_2(s7_scheme *sc, s7_pointer args)
     {
       s7_int i = integer(num);
       if (i & 1)
-	{
-	  s7_pointer x;
-	  new_cell(sc, x, T_RATIO);
-	  set_numerator(x, i);
-	  set_denominator(x, 2);
-	  return(x);
-	}
+        {
+          s7_pointer x;
+          new_cell(sc, x, T_RATIO);
+          set_numerator(x, i);
+          set_denominator(x, 2);
+          return(x);
+        }
       return(make_integer(sc, i >> 1));
     }
   switch (type(num))
@@ -21840,26 +21840,26 @@ static s7_pointer g_divide_by_2(s7_scheme *sc, s7_pointer args)
     case T_RATIO:
 #if HAVE_OVERFLOW_CHECKS
       {
-	s7_int dn;
-	if (multiply_overflow(denominator(num), 2, &dn))
-	  {
-	    if ((numerator(num) & 1) == 1)
+        s7_int dn;
+        if (multiply_overflow(denominator(num), 2, &dn))
+          {
+            if ((numerator(num) & 1) == 1)
 #if WITH_GMP
-	      {
-		mpq_set_si(sc->mpq_1, numerator(num), denominator(num));
-		mpq_set_si(sc->mpq_2, 1, 2);
-		mpq_mul(sc->mpq_1, sc->mpq_1, sc->mpq_2);
-		return(mpq_to_rational(sc, sc->mpq_1));
-	      }
+              {
+                mpq_set_si(sc->mpq_1, numerator(num), denominator(num));
+                mpq_set_si(sc->mpq_2, 1, 2);
+                mpq_mul(sc->mpq_1, sc->mpq_1, sc->mpq_2);
+                return(mpq_to_rational(sc, sc->mpq_1));
+              }
 #else
-	      {
-		if (WITH_WARNINGS) s7_warn(sc, 128, "ratio / 2 overflow: (/ %" ld64 "/%" ld64 " 2)\n", numerator(num), denominator(num));
-	        return(make_real(sc, ((long_double)numerator(num) * 0.5) / (long_double)denominator(num)));
-	      }
-#endif
-	    return(make_ratio(sc, numerator(num) / 2, denominator(num)));
-	  }
-	return(make_ratio_with_div_check(sc, sc->divide_symbol, numerator(num), dn));
+              {
+                if (WITH_WARNINGS) s7_warn(sc, 128, "ratio / 2 overflow: (/ %" ld64 "/%" ld64 " 2)\n", numerator(num), denominator(num));
+                return(make_real(sc, ((long_double)numerator(num) * 0.5) / (long_double)denominator(num)));
+              }
+#endif
+            return(make_ratio(sc, numerator(num) / 2, denominator(num)));
+          }
+        return(make_ratio_with_div_check(sc, sc->divide_symbol, numerator(num), dn));
       }
 #else
       return(make_ratio(sc, numerator(num), denominator(num) * 2));
@@ -21898,7 +21898,7 @@ static s7_pointer g_invert_x(s7_scheme *sc, s7_pointer args)
     {
       s7_double rl = real(x);
       if (rl == 0.0)
-	division_by_zero_error_2_nr(sc, sc->divide_symbol, car(args), x);
+        division_by_zero_error_2_nr(sc, sc->divide_symbol, car(args), x);
       return((is_NaN(rl)) ? x : make_real(sc, 1.0 / rl));
     }
   return(g_divide(sc, args));
@@ -21927,7 +21927,7 @@ static s7_pointer divide_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_p
     {
       s7_pointer arg1 = cadr(expr);
       if ((is_t_real(arg1)) && (real(arg1) == 1.0))
-	return(sc->invert_x);
+        return(sc->invert_x);
       return(((is_t_integer(caddr(expr))) && (integer(caddr(expr)) == 2)) ? sc->divide_by_2 : sc->divide_2);
     }
   return(f);
@@ -21975,28 +21975,28 @@ static s7_pointer quotient_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if ((is_real(x)) && (is_real(y)))
     {
       if (is_zero(y))
-	division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
+        division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
       if ((s7_is_integer(x)) && (s7_is_integer(y)))
-	{
-	  if (is_t_integer(x)) mpz_set_si(sc->mpz_1, integer(x)); else mpz_set(sc->mpz_1, big_integer(x));
-	  if (is_t_integer(y)) mpz_set_si(sc->mpz_2, integer(y)); else mpz_set(sc->mpz_2, big_integer(y));
-	  mpz_tdiv_q(sc->mpz_1, sc->mpz_1, sc->mpz_2);
-	}
+        {
+          if (is_t_integer(x)) mpz_set_si(sc->mpz_1, integer(x)); else mpz_set(sc->mpz_1, big_integer(x));
+          if (is_t_integer(y)) mpz_set_si(sc->mpz_2, integer(y)); else mpz_set(sc->mpz_2, big_integer(y));
+          mpz_tdiv_q(sc->mpz_1, sc->mpz_1, sc->mpz_2);
+        }
       else
-	if ((!is_rational(x)) || (!is_rational(y)))
-	  {
-	    if (any_real_to_mpfr(sc, x, sc->mpfr_1)) return(real_NaN);
-	    if (any_real_to_mpfr(sc, y, sc->mpfr_2)) return(real_NaN);
-	    mpfr_div(sc->mpfr_3, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
-	    mpfr_get_z(sc->mpz_1, sc->mpfr_3, MPFR_RNDZ);
-	  }
-	else
-	  {
-	    any_rational_to_mpq(sc, x, sc->mpq_1);
-	    any_rational_to_mpq(sc, y, sc->mpq_2);
-	    mpq_div(sc->mpq_3, sc->mpq_1, sc->mpq_2);
-	    mpz_tdiv_q(sc->mpz_1, mpq_numref(sc->mpq_3), mpq_denref(sc->mpq_3));
-	  }
+        if ((!is_rational(x)) || (!is_rational(y)))
+          {
+            if (any_real_to_mpfr(sc, x, sc->mpfr_1)) return(real_NaN);
+            if (any_real_to_mpfr(sc, y, sc->mpfr_2)) return(real_NaN);
+            mpfr_div(sc->mpfr_3, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
+            mpfr_get_z(sc->mpz_1, sc->mpfr_3, MPFR_RNDZ);
+          }
+        else
+          {
+            any_rational_to_mpq(sc, x, sc->mpq_1);
+            any_rational_to_mpq(sc, y, sc->mpq_2);
+            mpq_div(sc->mpq_3, sc->mpq_1, sc->mpq_2);
+            mpz_tdiv_q(sc->mpz_1, mpq_numref(sc->mpq_3), mpq_denref(sc->mpq_3));
+          }
       return(mpz_to_integer(sc, sc->mpz_1));
     }
   return(method_or_bust_pp(sc, (is_real(x)) ? y : x, sc->quotient_symbol, x, y, sc->type_names[T_REAL], (is_real(x)) ? 2 : 1));
@@ -22010,94 +22010,94 @@ static s7_pointer quotient_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(make_integer(sc, quotient_i_7ii(sc, integer(x), integer(y))));
-
-	case T_RATIO:
-	  n1 = integer(x);
-	  d1 = 1;
-	  n2 = numerator(y);
-	  d2 = denominator(y);
-	  /* (quotient -9223372036854775808 -1/9223372036854775807): arithmetic exception in the no-overflow-checks case */
-	  goto RATIO_QUO_RATIO;
-
-	case T_REAL:
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
-	  if (is_inf(real(y))) return(real_NaN);
-	  if (is_NaN(real(y))) return(y);
-	  return(s7_truncate(sc, sc->quotient_symbol, (s7_double)integer(x) / real(y))); /* s7_truncate returns an integer */
-
-	default:
-	  return(method_or_bust_pp(sc, y, sc->quotient_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+        {
+        case T_INTEGER:
+          return(make_integer(sc, quotient_i_7ii(sc, integer(x), integer(y))));
+
+        case T_RATIO:
+          n1 = integer(x);
+          d1 = 1;
+          n2 = numerator(y);
+          d2 = denominator(y);
+          /* (quotient -9223372036854775808 -1/9223372036854775807): arithmetic exception in the no-overflow-checks case */
+          goto RATIO_QUO_RATIO;
+
+        case T_REAL:
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
+          if (is_inf(real(y))) return(real_NaN);
+          if (is_NaN(real(y))) return(y);
+          return(s7_truncate(sc, sc->quotient_symbol, (s7_double)integer(x) / real(y))); /* s7_truncate returns an integer */
+
+        default:
+          return(method_or_bust_pp(sc, y, sc->quotient_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
-	  n1 = numerator(x);
-	  d1 = denominator(x);
-	  n2 = integer(y);
-	  d2 = 1;
-	  goto RATIO_QUO_RATIO;
-	  /* this can lose:
-	   *   (quotient 1 2305843009213693952/4611686018427387903) -> 2, not 1
-	   *   (quotient 21053343141/6701487259 3587785776203/1142027682075) -> 1, not 0
-	   */
-
-	case T_RATIO:
-	  parcel_out_fractions(x, y);
-	RATIO_QUO_RATIO:
-	  if (d1 == d2)
-	    return(make_integer(sc, n1 / n2));              /* (quotient 3/9223372036854775807 1/9223372036854775807) */
-	  if (n1 == n2)
-	    return(make_integer(sc, d2 / d1));              /* (quotient 9223372036854775807/2 9223372036854775807/8) */
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
+          n1 = numerator(x);
+          d1 = denominator(x);
+          n2 = integer(y);
+          d2 = 1;
+          goto RATIO_QUO_RATIO;
+          /* this can lose:
+           *   (quotient 1 2305843009213693952/4611686018427387903) -> 2, not 1
+           *   (quotient 21053343141/6701487259 3587785776203/1142027682075) -> 1, not 0
+           */
+
+        case T_RATIO:
+          parcel_out_fractions(x, y);
+        RATIO_QUO_RATIO:
+          if (d1 == d2)
+            return(make_integer(sc, n1 / n2));              /* (quotient 3/9223372036854775807 1/9223372036854775807) */
+          if (n1 == n2)
+            return(make_integer(sc, d2 / d1));              /* (quotient 9223372036854775807/2 9223372036854775807/8) */
 #if HAVE_OVERFLOW_CHECKS
-	  {
-	    s7_int n1d2, n2d1;
-	    if ((multiply_overflow(n1, d2, &n1d2)) ||
-		(multiply_overflow(n2, d1, &n2d1)))
-	      return(s7_truncate(sc, sc->quotient_symbol, ((long_double)n1 / (long_double)n2) * ((long_double)d2 / (long_double)d1)));
-	    return(make_integer(sc, n1d2 / n2d1));
-	  }
+          {
+            s7_int n1d2, n2d1;
+            if ((multiply_overflow(n1, d2, &n1d2)) ||
+                (multiply_overflow(n2, d1, &n2d1)))
+              return(s7_truncate(sc, sc->quotient_symbol, ((long_double)n1 / (long_double)n2) * ((long_double)d2 / (long_double)d1)));
+            return(make_integer(sc, n1d2 / n2d1));
+          }
 #else
-	  return(make_integer(sc, (n1 * d2) / (n2 * d1)));
+          return(make_integer(sc, (n1 * d2) / (n2 * d1)));
 #endif
 
-	case T_REAL:
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
-	  if (is_inf(real(y))) return(real_NaN);
-	  if (is_NaN(real(y))) return(y);
-	  return(s7_truncate(sc, sc->quotient_symbol, (s7_double)fraction(x) / real(y)));
+        case T_REAL:
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
+          if (is_inf(real(y))) return(real_NaN);
+          if (is_NaN(real(y))) return(y);
+          return(s7_truncate(sc, sc->quotient_symbol, (s7_double)fraction(x) / real(y)));
 
-	default:
-	  return(method_or_bust_pp(sc, y, sc->quotient_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+        default:
+          return(method_or_bust_pp(sc, y, sc->quotient_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     case T_REAL:
       if (((is_inf(real(x))) || (is_NaN(real(x)))) && (is_real(y)))
-	return(real_NaN);
+        return(real_NaN);
       /* if infs allowed we need to return infs/nans, else:
        *    (quotient inf.0 1e-309) -> -9223372036854775808
        *    (quotient inf.0 inf.0) -> -9223372036854775808
        */
 
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
-	  return(s7_truncate(sc, sc->quotient_symbol, (long_double)real(x) / (long_double)integer(y)));
-
-	case T_RATIO: return(s7_truncate(sc, sc->quotient_symbol, real(x) / (s7_double)fraction(y)));
-	case T_REAL:  return(make_integer(sc, c_quo_dbl(sc, real(x), real(y)))); /* c_quo_dbl returns an integer */
-	default:      return(method_or_bust_pp(sc, y, sc->quotient_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->quotient_symbol, x, y);
+          return(s7_truncate(sc, sc->quotient_symbol, (long_double)real(x) / (long_double)integer(y)));
+
+        case T_RATIO: return(s7_truncate(sc, sc->quotient_symbol, real(x) / (s7_double)fraction(y)));
+        case T_REAL:  return(make_integer(sc, c_quo_dbl(sc, real(x), real(y)))); /* c_quo_dbl returns an integer */
+        default:      return(method_or_bust_pp(sc, y, sc->quotient_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     default:
       return(method_or_bust_pp(sc, x, sc->quotient_symbol, x, y, sc->type_names[T_REAL], 2));
@@ -22128,33 +22128,33 @@ static s7_pointer big_mod_or_rem(s7_scheme *sc, s7_pointer x, s7_pointer y, bool
   if ((is_real(x)) && (is_real(y)))
     {
       if ((s7_is_integer(x)) && (s7_is_integer(y)))
-	{
-	  if (is_t_integer(x)) mpz_set_si(sc->mpz_1, integer(x)); else mpz_set(sc->mpz_1, big_integer(x));
-	  if (is_t_integer(y)) mpz_set_si(sc->mpz_2, integer(y)); else mpz_set(sc->mpz_2, big_integer(y));
-	  if (use_floor)
-	    mpz_fdiv_q(sc->mpz_3, sc->mpz_1, sc->mpz_2);
-	  else mpz_tdiv_q(sc->mpz_3, sc->mpz_1, sc->mpz_2);
-	  mpz_mul(sc->mpz_3, sc->mpz_3, sc->mpz_2);
-	  mpz_sub(sc->mpz_1, sc->mpz_1, sc->mpz_3);
-	  return(mpz_to_integer(sc, sc->mpz_1));
-	}
+        {
+          if (is_t_integer(x)) mpz_set_si(sc->mpz_1, integer(x)); else mpz_set(sc->mpz_1, big_integer(x));
+          if (is_t_integer(y)) mpz_set_si(sc->mpz_2, integer(y)); else mpz_set(sc->mpz_2, big_integer(y));
+          if (use_floor)
+            mpz_fdiv_q(sc->mpz_3, sc->mpz_1, sc->mpz_2);
+          else mpz_tdiv_q(sc->mpz_3, sc->mpz_1, sc->mpz_2);
+          mpz_mul(sc->mpz_3, sc->mpz_3, sc->mpz_2);
+          mpz_sub(sc->mpz_1, sc->mpz_1, sc->mpz_3);
+          return(mpz_to_integer(sc, sc->mpz_1));
+        }
       if ((!is_rational(x)) || (!is_rational(y)))
-	{
-	  any_real_to_mpfr(sc, x, sc->mpfr_1);
-	  any_real_to_mpfr(sc, y, sc->mpfr_2);
-	  mpfr_div(sc->mpfr_3, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
-	  if (use_floor)
-	    mpfr_get_z(sc->mpz_1, sc->mpfr_3, MPFR_RNDD);
-	  else mpfr_get_z(sc->mpz_1, sc->mpfr_3, MPFR_RNDZ);
-	  mpfr_mul_z(sc->mpfr_2, sc->mpfr_2, sc->mpz_1, MPFR_RNDN);
-	  mpfr_sub(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
-	  return(mpfr_to_big_real(sc, sc->mpfr_1));
-	}
+        {
+          any_real_to_mpfr(sc, x, sc->mpfr_1);
+          any_real_to_mpfr(sc, y, sc->mpfr_2);
+          mpfr_div(sc->mpfr_3, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
+          if (use_floor)
+            mpfr_get_z(sc->mpz_1, sc->mpfr_3, MPFR_RNDD);
+          else mpfr_get_z(sc->mpz_1, sc->mpfr_3, MPFR_RNDZ);
+          mpfr_mul_z(sc->mpfr_2, sc->mpfr_2, sc->mpz_1, MPFR_RNDN);
+          mpfr_sub(sc->mpfr_1, sc->mpfr_1, sc->mpfr_2, MPFR_RNDN);
+          return(mpfr_to_big_real(sc, sc->mpfr_1));
+        }
       any_rational_to_mpq(sc, x, sc->mpq_1);
       any_rational_to_mpq(sc, y, sc->mpq_2);
       mpq_div(sc->mpq_3, sc->mpq_1, sc->mpq_2);
       if (use_floor)
-	mpz_fdiv_q(sc->mpz_1, mpq_numref(sc->mpq_3), mpq_denref(sc->mpq_3));
+        mpz_fdiv_q(sc->mpz_1, mpq_numref(sc->mpq_3), mpq_denref(sc->mpq_3));
       else mpz_tdiv_q(sc->mpz_1, mpq_numref(sc->mpq_3), mpq_denref(sc->mpq_3));
       mpz_mul(mpq_numref(sc->mpq_2), sc->mpz_1, mpq_numref(sc->mpq_2));
       mpq_sub(sc->mpq_1, sc->mpq_1, sc->mpq_2);
@@ -22214,162 +22214,162 @@ static s7_pointer remainder_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(make_integer(sc, remainder_i_7ii(sc, integer(x), integer(y))));
-
-	case T_RATIO:
-	  n1 = integer(x);
-	  d1 = 1;
-	  n2 = numerator(y);
-	  d2 = denominator(y);
-	  goto RATIO_REM_RATIO;
-
-	case T_REAL:
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
-	  if (is_inf(real(y))) return(real_NaN);
-	  if (is_NaN(real(y))) return(y);
-	  pre_quo = (long_double)integer(x) / (long_double)real(y);
-	  if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
-	    sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
-	  quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
-	  return(make_real(sc, integer(x) - real(y) * quo));
-
-	default:
-	  return(method_or_bust_pp(sc, y, sc->remainder_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+        {
+        case T_INTEGER:
+          return(make_integer(sc, remainder_i_7ii(sc, integer(x), integer(y))));
+
+        case T_RATIO:
+          n1 = integer(x);
+          d1 = 1;
+          n2 = numerator(y);
+          d2 = denominator(y);
+          goto RATIO_REM_RATIO;
+
+        case T_REAL:
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
+          if (is_inf(real(y))) return(real_NaN);
+          if (is_NaN(real(y))) return(y);
+          pre_quo = (long_double)integer(x) / (long_double)real(y);
+          if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
+            sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
+          quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
+          return(make_real(sc, integer(x) - real(y) * quo));
+
+        default:
+          return(method_or_bust_pp(sc, y, sc->remainder_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  n2 = integer(y);
- 	  if (n2 == 0)
- 	    division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
-	  n1 = numerator(x);
-	  d1 = denominator(x);
-	  d2 = 1;
-	  goto RATIO_REM_RATIO;
-
-	case T_RATIO:
-	  parcel_out_fractions(x, y);
-	RATIO_REM_RATIO:
-	  if (d1 == d2)
-	    quo = (s7_int)(n1 / n2);
-	  else
-	    {
-	      if (n1 == n2)
-		quo = (s7_int)(d2 / d1);
-	      else
-		{
+        {
+        case T_INTEGER:
+          n2 = integer(y);
+           if (n2 == 0)
+             division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
+          n1 = numerator(x);
+          d1 = denominator(x);
+          d2 = 1;
+          goto RATIO_REM_RATIO;
+
+        case T_RATIO:
+          parcel_out_fractions(x, y);
+        RATIO_REM_RATIO:
+          if (d1 == d2)
+            quo = (s7_int)(n1 / n2);
+          else
+            {
+              if (n1 == n2)
+                quo = (s7_int)(d2 / d1);
+              else
+                {
 #if HAVE_OVERFLOW_CHECKS
-		  s7_int n1d2, n2d1;
-		  if ((multiply_overflow(n1, d2, &n1d2)) ||
-		      (multiply_overflow(n2, d1, &n2d1)))
-		    {
-		      pre_quo = ((long_double)n1 / (long_double)n2) * ((long_double)d2 / (long_double)d1);
-		      if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
-			sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
-		      quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
-		    }
-		  else quo = n1d2 / n2d1;
+                  s7_int n1d2, n2d1;
+                  if ((multiply_overflow(n1, d2, &n1d2)) ||
+                      (multiply_overflow(n2, d1, &n2d1)))
+                    {
+                      pre_quo = ((long_double)n1 / (long_double)n2) * ((long_double)d2 / (long_double)d1);
+                      if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
+                        sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
+                      quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
+                    }
+                  else quo = n1d2 / n2d1;
 #else
-		  quo = (n1 * d2) / (n2 * d1);
+                  quo = (n1 * d2) / (n2 * d1);
 #endif
-		}}
-	  if (quo == 0)
-	    return(x);
+                }}
+          if (quo == 0)
+            return(x);
 
 #if HAVE_OVERFLOW_CHECKS
-	  {
-	    s7_int dn, nq;
-	    if (!multiply_overflow(n2, quo, &nq))
-	      {
-		if ((d1 == d2) &&
-		    (!subtract_overflow(n1, nq, &dn)))
-		  return(make_ratio_with_div_check(sc, sc->remainder_symbol, dn, d1));
-
-		if ((!multiply_overflow(n1, d2, &dn)) &&
-		    (!multiply_overflow(nq, d1, &nq)) &&
-		    (!subtract_overflow(dn, nq, &nq)) &&
-		    (!multiply_overflow(d1, d2, &d1)))
-		  return(make_ratio_with_div_check(sc, sc->remainder_symbol, nq, d1));
-	      }}
+          {
+            s7_int dn, nq;
+            if (!multiply_overflow(n2, quo, &nq))
+              {
+                if ((d1 == d2) &&
+                    (!subtract_overflow(n1, nq, &dn)))
+                  return(make_ratio_with_div_check(sc, sc->remainder_symbol, dn, d1));
+
+                if ((!multiply_overflow(n1, d2, &dn)) &&
+                    (!multiply_overflow(nq, d1, &nq)) &&
+                    (!subtract_overflow(dn, nq, &nq)) &&
+                    (!multiply_overflow(d1, d2, &d1)))
+                  return(make_ratio_with_div_check(sc, sc->remainder_symbol, nq, d1));
+              }}
 #else
-	  if (d1 == d2)
-	    return(make_ratio_with_div_check(sc, sc->remainder_symbol, n1 - n2 * quo, d1));
-
-	  return(make_ratio_with_div_check(sc, sc->remainder_symbol, n1 * d2 - n2 * d1 * quo, d1 * d2));
-#endif
-	  sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), intermediate_too_large_string);
-
-	case T_REAL:
-	  {
-	    s7_double frac;
-	    if (real(y) == 0.0)
-	      division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
-	    if (is_inf(real(y))) return(real_NaN);
-	    if (is_NaN(real(y))) return(y);
-	    if (s7_int_abs(numerator(x)) > QUOTIENT_INT_LIMIT)
-	      return(subtract_p_pp(sc, x, multiply_p_pp(sc, y, quotient_p_pp(sc, x, y))));
-	    frac = (s7_double)fraction(x);
-	    pre_quo = frac / real(y);
-	    if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
-	      sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
-	    quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
-	    return(make_real(sc, frac - real(y) * quo));
-	  }
-
-	default:
-	  return(method_or_bust_pp(sc, y, sc->remainder_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+          if (d1 == d2)
+            return(make_ratio_with_div_check(sc, sc->remainder_symbol, n1 - n2 * quo, d1));
+
+          return(make_ratio_with_div_check(sc, sc->remainder_symbol, n1 * d2 - n2 * d1 * quo, d1 * d2));
+#endif
+          sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), intermediate_too_large_string);
+
+        case T_REAL:
+          {
+            s7_double frac;
+            if (real(y) == 0.0)
+              division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
+            if (is_inf(real(y))) return(real_NaN);
+            if (is_NaN(real(y))) return(y);
+            if (s7_int_abs(numerator(x)) > QUOTIENT_INT_LIMIT)
+              return(subtract_p_pp(sc, x, multiply_p_pp(sc, y, quotient_p_pp(sc, x, y))));
+            frac = (s7_double)fraction(x);
+            pre_quo = frac / real(y);
+            if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
+              sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
+            quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
+            return(make_real(sc, frac - real(y) * quo));
+          }
+
+        default:
+          return(method_or_bust_pp(sc, y, sc->remainder_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     case T_REAL:
       if (((is_inf(real(x))) || (is_NaN(real(x)))) && (is_real(y)))
-	{
-	  if (is_zero(y))
-	    division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
-	  return(real_NaN);
-	}
+        {
+          if (is_zero(y))
+            division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
+          return(real_NaN);
+        }
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0)
-	    division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
-	  /* actually here (and elsewhere) if y > INT64_TO_DOUBLE_LIMIT, the result is probably wrong */
-	  pre_quo = (long_double)real(x) / (long_double)integer(y);
-	  if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
-	    sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
-	  quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
-	  return(make_real(sc, real(x) - integer(y) * quo));
-	  /* but... (remainder 1e+18 9223372036854775807) -> 1e+18 */
-
-	case T_RATIO:
-	  if (s7_int_abs(numerator(y)) > QUOTIENT_INT_LIMIT)
-	    return(subtract_p_pp(sc, x, multiply_p_pp(sc, y, quotient_p_pp(sc, x, y))));
-	  {
-	    s7_double frac = (s7_double)fraction(y);
-	    pre_quo = real(x) / frac;
-	    if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
-	      sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
-	    quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
-	    return(make_real(sc, real(x) - frac * quo));
-	  }
-
-	case T_REAL:
-	  if (real(y) == 0.0)
-	    division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
-	  return(make_real(sc, c_rem_dbl(sc, real(x), real(y))));
-	  /* see under sin -- this calculation is completely bogus if "a" is large
-	   * (quotient 1e22 (* 2 pi)) -> -9223372036854775808 but it should be 1591549430918953357688,
-	   * (remainder 1e22 (* 2 pi)) -> 1.0057952155665e+22 -- the "remainder" is greater than the original argument!
-	   * Clisp gives 0.0 here, as does sbcl, currently s7 throws an error (out-of-range).
-	   */
-
-	default:
-	  return(method_or_bust_pp(sc, y, sc->remainder_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+        {
+        case T_INTEGER:
+          if (integer(y) == 0)
+            division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
+          /* actually here (and elsewhere) if y > INT64_TO_DOUBLE_LIMIT, the result is probably wrong */
+          pre_quo = (long_double)real(x) / (long_double)integer(y);
+          if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
+            sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
+          quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
+          return(make_real(sc, real(x) - integer(y) * quo));
+          /* but... (remainder 1e+18 9223372036854775807) -> 1e+18 */
+
+        case T_RATIO:
+          if (s7_int_abs(numerator(y)) > QUOTIENT_INT_LIMIT)
+            return(subtract_p_pp(sc, x, multiply_p_pp(sc, y, quotient_p_pp(sc, x, y))));
+          {
+            s7_double frac = (s7_double)fraction(y);
+            pre_quo = real(x) / frac;
+            if (fabs(pre_quo) > REMAINDER_FLOAT_LIMIT)
+              sole_arg_out_of_range_error_nr(sc, sc->remainder_symbol, set_elist_2(sc, x, y), it_is_too_large_string);
+            quo = (pre_quo > 0.0) ? (s7_int)floor(pre_quo) : (s7_int)ceil(pre_quo);
+            return(make_real(sc, real(x) - frac * quo));
+          }
+
+        case T_REAL:
+          if (real(y) == 0.0)
+            division_by_zero_error_2_nr(sc, sc->remainder_symbol, x, y);
+          return(make_real(sc, c_rem_dbl(sc, real(x), real(y))));
+          /* see under sin -- this calculation is completely bogus if "a" is large
+           * (quotient 1e22 (* 2 pi)) -> -9223372036854775808 but it should be 1591549430918953357688,
+           * (remainder 1e22 (* 2 pi)) -> 1.0057952155665e+22 -- the "remainder" is greater than the original argument!
+           * Clisp gives 0.0 here, as does sbcl, currently s7 throws an error (out-of-range).
+           */
+
+        default:
+          return(method_or_bust_pp(sc, y, sc->remainder_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     default:
       return(method_or_bust_pp(sc, x, sc->remainder_symbol, x, y, sc->type_names[T_REAL], 1));
@@ -22430,8 +22430,8 @@ static s7_double modulo_d_7dd(s7_scheme *sc, s7_double x1, s7_double x2)
   c = x1 / x2;
   if ((c > 1e19) || (c < -1e19))
     sole_arg_out_of_range_error_nr(sc, sc->modulo_symbol,
-			set_elist_3(sc, sc->divide_symbol, wrap_real(sc, x1), wrap_real(sc, x2)),
-			intermediate_too_large_string);
+                        set_elist_3(sc, sc->divide_symbol, wrap_real(sc, x1), wrap_real(sc, x2)),
+                        intermediate_too_large_string);
   return(x1 - x2 * (s7_int)floor(c));
 }
 
@@ -22454,161 +22454,161 @@ static s7_pointer modulo_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(make_integer(sc, modulo_i_ii(integer(x), integer(y))));
-
-	case T_RATIO:
-	  n1 = integer(x);
-	  d1 = 1;
-	  n2 = numerator(y);
-	  d2 = denominator(y);
-	  if ((n1 == n2) && (d1 > d2)) return(x); /* signs match so this should be ok */
-	  goto RATIO_MOD_RATIO;
-
-	case T_REAL:
-	  if ((integer(x) == S7_INT64_MIN) || (s7_int_abs(integer(x)) > QUOTIENT_INT_LIMIT))
-	    out_of_range_error_nr(sc, sc->modulo_symbol, int_one, x, it_is_too_large_string);
-	  b = real(y);
-	  if (b == 0.0) return(x);
-	  if (is_NaN(b)) return(y);
-	  if (is_inf(b)) return(real_NaN);
-	  a = (s7_double)integer(x);
-	  goto REAL_MOD;
-
-	default:
-	  return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+        {
+        case T_INTEGER:
+          return(make_integer(sc, modulo_i_ii(integer(x), integer(y))));
+
+        case T_RATIO:
+          n1 = integer(x);
+          d1 = 1;
+          n2 = numerator(y);
+          d2 = denominator(y);
+          if ((n1 == n2) && (d1 > d2)) return(x); /* signs match so this should be ok */
+          goto RATIO_MOD_RATIO;
+
+        case T_REAL:
+          if ((integer(x) == S7_INT64_MIN) || (s7_int_abs(integer(x)) > QUOTIENT_INT_LIMIT))
+            out_of_range_error_nr(sc, sc->modulo_symbol, int_one, x, it_is_too_large_string);
+          b = real(y);
+          if (b == 0.0) return(x);
+          if (is_NaN(b)) return(y);
+          if (is_inf(b)) return(real_NaN);
+          a = (s7_double)integer(x);
+          goto REAL_MOD;
+
+        default:
+          return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (integer(y) == 0) return(x);
-	  n1 = numerator(x);
-	  d1 = denominator(x);
-	  n2 = integer(y);
-
-	  if ((n2 > 0) && (n1 > 0) && (n2 > n1)) return(x);
-	  if ((n2 < 0) && (n1 < 0) && (n2 < n1)) return(x);
-	  if (n2 == S7_INT64_MIN)
-	    sole_arg_out_of_range_error_nr(sc, sc->modulo_symbol,
-				       set_elist_3(sc, sc->divide_symbol, x, y),
-				       intermediate_too_large_string);
-	  /* the problem here is that (modulo 3/2 most-negative-fixnum)
-	   * will segfault with signal SIGFPE, Arithmetic exception, so try to trap it.
-	   */
-	  if ((n1 == n2) && (d1 > 1)) return(x);
-	  d2 = 1;
-	  goto RATIO_MOD_RATIO;
-
-	case T_RATIO:
-	  parcel_out_fractions(x, y);
-	  if (d1 == d2)
-	    return(make_ratio_with_div_check(sc, sc->modulo_symbol, modulo_i_ii(n1, n2), d1));
-	  if ((n1 == n2) && (d1 > d2)) return(x);
-
-	RATIO_MOD_RATIO:
+        {
+        case T_INTEGER:
+          if (integer(y) == 0) return(x);
+          n1 = numerator(x);
+          d1 = denominator(x);
+          n2 = integer(y);
+
+          if ((n2 > 0) && (n1 > 0) && (n2 > n1)) return(x);
+          if ((n2 < 0) && (n1 < 0) && (n2 < n1)) return(x);
+          if (n2 == S7_INT64_MIN)
+            sole_arg_out_of_range_error_nr(sc, sc->modulo_symbol,
+                                       set_elist_3(sc, sc->divide_symbol, x, y),
+                                       intermediate_too_large_string);
+          /* the problem here is that (modulo 3/2 most-negative-fixnum)
+           * will segfault with signal SIGFPE, Arithmetic exception, so try to trap it.
+           */
+          if ((n1 == n2) && (d1 > 1)) return(x);
+          d2 = 1;
+          goto RATIO_MOD_RATIO;
+
+        case T_RATIO:
+          parcel_out_fractions(x, y);
+          if (d1 == d2)
+            return(make_ratio_with_div_check(sc, sc->modulo_symbol, modulo_i_ii(n1, n2), d1));
+          if ((n1 == n2) && (d1 > d2)) return(x);
+
+        RATIO_MOD_RATIO:
 #if HAVE_OVERFLOW_CHECKS
-	  {
-	    s7_int n2d1, n1d2, d1d2, fl;
-	    if (!multiply_overflow(n2, d1, &n2d1))
-	      {
-		if ((n2d1 == 1) || (n2d1 == -1)) /* (modulo 100 -1/2) */
-		  return(int_zero);
-
-		if (!multiply_overflow(n1, d2, &n1d2))
-		  {
-		    fl = (s7_int)(n1d2 / n2d1);
-		    if (((n1 < 0) && (n2 > 0)) ||
-			((n1 > 0) && (n2 < 0)))
-		      fl -= 1;
-		    if (fl == 0)
-		      return(x);
-
-		    if ((!multiply_overflow(d1, d2, &d1d2)) &&
-			(!multiply_overflow(fl, n2d1, &fl)) &&
-			(!subtract_overflow(n1d2, fl, &fl)))
-		      return(make_ratio_with_div_check(sc, sc->modulo_symbol, fl, d1d2));
-		  }}}
+          {
+            s7_int n2d1, n1d2, d1d2, fl;
+            if (!multiply_overflow(n2, d1, &n2d1))
+              {
+                if ((n2d1 == 1) || (n2d1 == -1)) /* (modulo 100 -1/2) */
+                  return(int_zero);
+
+                if (!multiply_overflow(n1, d2, &n1d2))
+                  {
+                    fl = (s7_int)(n1d2 / n2d1);
+                    if (((n1 < 0) && (n2 > 0)) ||
+                        ((n1 > 0) && (n2 < 0)))
+                      fl -= 1;
+                    if (fl == 0)
+                      return(x);
+
+                    if ((!multiply_overflow(d1, d2, &d1d2)) &&
+                        (!multiply_overflow(fl, n2d1, &fl)) &&
+                        (!subtract_overflow(n1d2, fl, &fl)))
+                      return(make_ratio_with_div_check(sc, sc->modulo_symbol, fl, d1d2));
+                  }}}
 #else
-	  {
-	    s7_int fl;
-	    s7_int n1d2 = n1 * d2;
-	    s7_int n2d1 = n2 * d1;
-
-	    if (n2d1 == 1)
-	      return(int_zero);
-
-	    /* can't use "floor" here (float->int ruins everything) */
-	    fl = (s7_int)(n1d2 / n2d1);
-	    if (((n1 < 0) && (n2 > 0)) ||
-		((n1 > 0) && (n2 < 0)))
-	      fl -= 1;
-
-	    if (fl == 0)
-	      return(x);
-
-	    return(make_ratio_with_div_check(sc, sc->modulo_symbol, n1d2 - (n2d1 * fl), d1 * d2));
-	  }
-#endif
-	  sole_arg_out_of_range_error_nr(sc, sc->modulo_symbol,
-				     set_elist_3(sc, sc->divide_symbol, x, y),
-				     intermediate_too_large_string);
-	case T_REAL:
-	  b = real(y);
-	  if (is_inf(b)) return(real_NaN);
-	  if (fabs(b) > 1e17)
-	    out_of_range_error_nr(sc, sc->modulo_symbol, int_two, y, it_is_too_large_string);
-	  if (b == 0.0) return(x);
-	  if (is_NaN(b)) return(y);
-	  a = fraction(x);
-	  return(make_real(sc, a - b * (s7_int)floor(a / b)));
-
-	default:
-	  return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
-	}
+          {
+            s7_int fl;
+            s7_int n1d2 = n1 * d2;
+            s7_int n2d1 = n2 * d1;
+
+            if (n2d1 == 1)
+              return(int_zero);
+
+            /* can't use "floor" here (float->int ruins everything) */
+            fl = (s7_int)(n1d2 / n2d1);
+            if (((n1 < 0) && (n2 > 0)) ||
+                ((n1 > 0) && (n2 < 0)))
+              fl -= 1;
+
+            if (fl == 0)
+              return(x);
+
+            return(make_ratio_with_div_check(sc, sc->modulo_symbol, n1d2 - (n2d1 * fl), d1 * d2));
+          }
+#endif
+          sole_arg_out_of_range_error_nr(sc, sc->modulo_symbol,
+                                     set_elist_3(sc, sc->divide_symbol, x, y),
+                                     intermediate_too_large_string);
+        case T_REAL:
+          b = real(y);
+          if (is_inf(b)) return(real_NaN);
+          if (fabs(b) > 1e17)
+            out_of_range_error_nr(sc, sc->modulo_symbol, int_two, y, it_is_too_large_string);
+          if (b == 0.0) return(x);
+          if (is_NaN(b)) return(y);
+          a = fraction(x);
+          return(make_real(sc, a - b * (s7_int)floor(a / b)));
+
+        default:
+          return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
+        }
 
     case T_REAL:
       {
-	s7_double c;
-	a = real(x);
-	if (!is_real(y))
-	  return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
-	if (is_NaN(a)) return(x);
-	if (is_inf(a)) return(real_NaN); /* not b */
-	if (fabs(a) > 1e17)
-	  out_of_range_error_nr(sc, sc->modulo_symbol, int_one, x, it_is_too_large_string);
-
-	switch (type(y))
-	  {
-	  case T_INTEGER:
-	    if (integer(y) == 0) return(x);
-	    if ((integer(y) == S7_INT64_MIN) || (s7_int_abs(integer(y)) > QUOTIENT_INT_LIMIT))
-	      out_of_range_error_nr(sc, sc->modulo_symbol, int_two, y, it_is_too_large_string);
-	    b = (s7_double)integer(y);
-	    goto REAL_MOD;
-
-	  case T_RATIO:
-	    b = fraction(y);
-	    goto REAL_MOD;
-
-	  case T_REAL:
-	    b = real(y);
-	    if (b == 0.0) return(x);
-	    if (is_NaN(b)) return(y);
-	    if (is_inf(b)) return(real_NaN);
-	  REAL_MOD:
-	    c = a / b;
-	    if (fabs(c) > 1e19)
-	      sole_arg_out_of_range_error_nr(sc, sc->modulo_symbol,
-					 set_elist_3(sc, sc->divide_symbol, x, y),
-					 intermediate_too_large_string);
-	    return(make_real(sc, a - b * (s7_int)floor(c)));
-
-	  default:
-	    return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
-	  }}
+        s7_double c;
+        a = real(x);
+        if (!is_real(y))
+          return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
+        if (is_NaN(a)) return(x);
+        if (is_inf(a)) return(real_NaN); /* not b */
+        if (fabs(a) > 1e17)
+          out_of_range_error_nr(sc, sc->modulo_symbol, int_one, x, it_is_too_large_string);
+
+        switch (type(y))
+          {
+          case T_INTEGER:
+            if (integer(y) == 0) return(x);
+            if ((integer(y) == S7_INT64_MIN) || (s7_int_abs(integer(y)) > QUOTIENT_INT_LIMIT))
+              out_of_range_error_nr(sc, sc->modulo_symbol, int_two, y, it_is_too_large_string);
+            b = (s7_double)integer(y);
+            goto REAL_MOD;
+
+          case T_RATIO:
+            b = fraction(y);
+            goto REAL_MOD;
+
+          case T_REAL:
+            b = real(y);
+            if (b == 0.0) return(x);
+            if (is_NaN(b)) return(y);
+            if (is_inf(b)) return(real_NaN);
+          REAL_MOD:
+            c = a / b;
+            if (fabs(c) > 1e19)
+              sole_arg_out_of_range_error_nr(sc, sc->modulo_symbol,
+                                         set_elist_3(sc, sc->divide_symbol, x, y),
+                                         intermediate_too_large_string);
+            return(make_real(sc, a - b * (s7_int)floor(c)));
+
+          default:
+            return(method_or_bust_pp(sc, y, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 2));
+          }}
 
     default:
       return(method_or_bust_pp(sc, x, sc->modulo_symbol, x, y, sc->type_names[T_REAL], 1));
@@ -22655,156 +22655,156 @@ static s7_pointer max_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (type(x) == type(y))
     {
       if (is_t_integer(x))
-	return((integer(x) < integer(y)) ? y : x);
+        return((integer(x) < integer(y)) ? y : x);
       if (is_t_real(x))
-	/* return(((is_NaN(real(x))) || (real(x) >= real(y))) ? x : y); */
-	return(((real(x) >= real(y)) || (is_NaN(real(x)))) ? x : y);
+        /* return(((is_NaN(real(x))) || (real(x) >= real(y))) ? x : y); */
+        return(((real(x) >= real(y)) || (is_NaN(real(x)))) ? x : y);
       if (is_t_ratio(x))
-	return((fraction(x) < fraction(y)) ? y : x);
+        return((fraction(x) < fraction(y)) ? y : x);
 #if WITH_GMP
       if (is_t_big_integer(x))
-	return((mpz_cmp(big_integer(x), big_integer(y)) < 0) ? y : x);
+        return((mpz_cmp(big_integer(x), big_integer(y)) < 0) ? y : x);
       if (is_t_big_ratio(x))
-	return((mpq_cmp(big_ratio(x), big_ratio(y)) < 0) ? y : x);
+        return((mpq_cmp(big_ratio(x), big_ratio(y)) < 0) ? y : x);
       if (is_t_big_real(x))
-	return(((mpfr_nan_p(big_real(x)) != 0) || (mpfr_greaterequal_p(big_real(x), big_real(y)))) ? x : y); /* ?? */
+        return(((mpfr_nan_p(big_real(x)) != 0) || (mpfr_greaterequal_p(big_real(x), big_real(y)))) ? x : y); /* ?? */
 #endif
     }
   switch (type(x))
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:
-	  return((integer(x) < fraction(y)) ? y : x);
-	case T_REAL:
-	  return(((integer(x) < real(y)) || (is_NaN(real(y)))) ? y : x);
+        {
+        case T_RATIO:
+          return((integer(x) < fraction(y)) ? y : x);
+        case T_REAL:
+          return(((integer(x) < real(y)) || (is_NaN(real(y)))) ? y : x);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  return((mpz_cmp_si(big_integer(y), integer(x)) < 0) ? x : y);
-	case T_BIG_RATIO:
-	  return((mpq_cmp_si(big_ratio(y), integer(x), 1) < 0) ? x : y);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_si(big_real(y), integer(x)) < 0) ? x : y);
-#endif
-	default:
-	  return(max_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          return((mpz_cmp_si(big_integer(y), integer(x)) < 0) ? x : y);
+        case T_BIG_RATIO:
+          return((mpq_cmp_si(big_ratio(y), integer(x), 1) < 0) ? x : y);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_si(big_real(y), integer(x)) < 0) ? x : y);
+#endif
+        default:
+          return(max_out_y(sc, x, y));
+        }
       break;
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return((fraction(x) < integer(y)) ? y : x);
-	case T_REAL:
-	  return(((fraction(x) < real(y)) || (is_NaN(real(y)))) ? y : x);
+        {
+        case T_INTEGER:
+          return((fraction(x) < integer(y)) ? y : x);
+        case T_REAL:
+          return(((fraction(x) < real(y)) || (is_NaN(real(y)))) ? y : x);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return((mpq_cmp_z(sc->mpq_1, big_integer(y)) < 0) ? y : x);
-	case T_BIG_RATIO:
-	  return((mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) < 0) ? x : y);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return((mpfr_cmp_q(big_real(y), sc->mpq_1) < 0) ? x : y);
-#endif
-	default:
-	  return(max_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return((mpq_cmp_z(sc->mpq_1, big_integer(y)) < 0) ? y : x);
+        case T_BIG_RATIO:
+          return((mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) < 0) ? x : y);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return((mpfr_cmp_q(big_real(y), sc->mpq_1) < 0) ? x : y);
+#endif
+        default:
+          return(max_out_y(sc, x, y));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(((real(x) >= integer(y)) || (is_NaN(real(x)))) ? x : y);
-	case T_RATIO:
-	  return((real(x) < fraction(y)) ? y : x);
+        {
+        case T_INTEGER:
+          return(((real(x) >= integer(y)) || (is_NaN(real(x)))) ? x : y);
+        case T_RATIO:
+          return((real(x) < fraction(y)) ? y : x);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (is_NaN(real(x))) return(x);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return((mpfr_cmp_z(sc->mpfr_1, big_integer(y)) < 0) ? y : x);
-	case T_BIG_RATIO:
-	  if (is_NaN(real(x))) return(x);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return((mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) < 0) ? y : x);
-	case T_BIG_REAL:
-	  if (is_NaN(real(x))) return(x);
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_d(big_real(y), real(x)) < 0) ? x : y);
-#endif
-	default:
-	  return(max_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          if (is_NaN(real(x))) return(x);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return((mpfr_cmp_z(sc->mpfr_1, big_integer(y)) < 0) ? y : x);
+        case T_BIG_RATIO:
+          if (is_NaN(real(x))) return(x);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return((mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) < 0) ? y : x);
+        case T_BIG_REAL:
+          if (is_NaN(real(x))) return(x);
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_d(big_real(y), real(x)) < 0) ? x : y);
+#endif
+        default:
+          return(max_out_y(sc, x, y));
+        }
       break;
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return((mpz_cmp_si(big_integer(x), integer(y)) < 0) ? y : x);
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return((mpq_cmp_z(sc->mpq_1, big_integer(x)) < 0) ? x : y);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return((mpfr_cmp_d(sc->mpfr_1, real(y)) < 0) ? y : x);
-	case T_BIG_RATIO:
-	  return((mpq_cmp_z(big_ratio(y), big_integer(x)) < 0) ? x : y);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_z(big_real(y), big_integer(x)) < 0) ? x : y);
-	default:
-	  return(max_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return((mpz_cmp_si(big_integer(x), integer(y)) < 0) ? y : x);
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return((mpq_cmp_z(sc->mpq_1, big_integer(x)) < 0) ? x : y);
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return((mpfr_cmp_d(sc->mpfr_1, real(y)) < 0) ? y : x);
+        case T_BIG_RATIO:
+          return((mpq_cmp_z(big_ratio(y), big_integer(x)) < 0) ? x : y);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_z(big_real(y), big_integer(x)) < 0) ? x : y);
+        default:
+          return(max_out_y(sc, x, y));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return((mpq_cmp_si(big_ratio(x), integer(y), 1) < 0) ? y : x);
-	case T_RATIO:
-	  return((mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) < 0) ? y : x);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return((mpfr_cmp_d(sc->mpfr_1, real(y)) < 0) ? y : x);
-	case T_BIG_INTEGER:
-	  return((mpq_cmp_z(big_ratio(x), big_integer(y)) < 0) ? y : x);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_q(big_real(y), big_ratio(x)) < 0) ? x : y);
-	default:
-	  return(max_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return((mpq_cmp_si(big_ratio(x), integer(y), 1) < 0) ? y : x);
+        case T_RATIO:
+          return((mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) < 0) ? y : x);
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return((mpfr_cmp_d(sc->mpfr_1, real(y)) < 0) ? y : x);
+        case T_BIG_INTEGER:
+          return((mpq_cmp_z(big_ratio(x), big_integer(y)) < 0) ? y : x);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_q(big_real(y), big_ratio(x)) < 0) ? x : y);
+        default:
+          return(max_out_y(sc, x, y));
+        }
 
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  return((mpfr_cmp_si(big_real(x), integer(y)) < 0) ? y : x);
-	case T_RATIO:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return((mpfr_cmp_q(big_real(x), sc->mpq_1) < 0) ? y : x);
-	case T_REAL:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  if (is_NaN(real(y))) return(y);
-	  return((mpfr_cmp_d(big_real(x), real(y)) < 0) ? y : x);
-	case T_BIG_INTEGER:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  return((mpfr_cmp_z(big_real(x), big_integer(y)) < 0) ? y : x);
-	case T_BIG_RATIO:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  return((mpfr_cmp_q(big_real(x), big_ratio(y)) < 0) ? y : x);
-	default:
-	  return(max_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          return((mpfr_cmp_si(big_real(x), integer(y)) < 0) ? y : x);
+        case T_RATIO:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return((mpfr_cmp_q(big_real(x), sc->mpq_1) < 0) ? y : x);
+        case T_REAL:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          if (is_NaN(real(y))) return(y);
+          return((mpfr_cmp_d(big_real(x), real(y)) < 0) ? y : x);
+        case T_BIG_INTEGER:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          return((mpfr_cmp_z(big_real(x), big_integer(y)) < 0) ? y : x);
+        case T_BIG_RATIO:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          return((mpfr_cmp_q(big_real(x), big_ratio(y)) < 0) ? y : x);
+        default:
+          return(max_out_y(sc, x, y));
+        }
 #endif
     default:
       return(max_out_x(sc, x, y));
@@ -22852,155 +22852,155 @@ static s7_pointer min_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (type(x) == type(y))
     {
       if (is_t_integer(x))
-	return((integer(x) > integer(y)) ? y : x);
+        return((integer(x) > integer(y)) ? y : x);
       if (is_t_real(x))
-	/* return(((is_NaN(real(x))) || (real(x) <= real(y))) ? x : y); */
-	return(((real(x) <= real(y)) || (is_NaN(real(x)))) ? x : y);
+        /* return(((is_NaN(real(x))) || (real(x) <= real(y))) ? x : y); */
+        return(((real(x) <= real(y)) || (is_NaN(real(x)))) ? x : y);
       if (is_t_ratio(x))
-	return((fraction(x) > fraction(y)) ? y : x);
+        return((fraction(x) > fraction(y)) ? y : x);
 #if WITH_GMP
       if (is_t_big_integer(x))
-	return((mpz_cmp(big_integer(x), big_integer(y)) > 0) ? y : x);
+        return((mpz_cmp(big_integer(x), big_integer(y)) > 0) ? y : x);
       if (is_t_big_ratio(x))
-	return((mpq_cmp(big_ratio(x), big_ratio(y)) > 0) ? y : x);
+        return((mpq_cmp(big_ratio(x), big_ratio(y)) > 0) ? y : x);
       if (is_t_big_real(x))
-	return(((mpfr_nan_p(big_real(x)) != 0) || (mpfr_lessequal_p(big_real(x), big_real(y)))) ? x : y); /* ?? */
+        return(((mpfr_nan_p(big_real(x)) != 0) || (mpfr_lessequal_p(big_real(x), big_real(y)))) ? x : y); /* ?? */
 #endif
     }
   switch (type(x))
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:       return((integer(x) > fraction(y)) ? y : x);
-	case T_REAL:
-	  return(((integer(x) > real(y)) || (is_NaN(real(y)))) ? y : x);
+        {
+        case T_RATIO:       return((integer(x) > fraction(y)) ? y : x);
+        case T_REAL:
+          return(((integer(x) > real(y)) || (is_NaN(real(y)))) ? y : x);
 #if WITH_GMP
-	case T_BIG_INTEGER: return((mpz_cmp_si(big_integer(y), integer(x)) > 0) ? x : y);
-	case T_BIG_RATIO:   return((mpq_cmp_si(big_ratio(y), integer(x), 1) > 0) ? x : y);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_si(big_real(y), integer(x)) > 0) ? x : y);
-#endif
-	default:
-	  return(min_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER: return((mpz_cmp_si(big_integer(y), integer(x)) > 0) ? x : y);
+        case T_BIG_RATIO:   return((mpq_cmp_si(big_ratio(y), integer(x), 1) > 0) ? x : y);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_si(big_real(y), integer(x)) > 0) ? x : y);
+#endif
+        default:
+          return(min_out_y(sc, x, y));
+        }
       break;
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return((fraction(x) > integer(y)) ? y : x);
-	case T_REAL:
-	  return(((fraction(x) > real(y)) || (is_NaN(real(y)))) ? y : x);
+        {
+        case T_INTEGER:
+          return((fraction(x) > integer(y)) ? y : x);
+        case T_REAL:
+          return(((fraction(x) > real(y)) || (is_NaN(real(y)))) ? y : x);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return((mpq_cmp_z(sc->mpq_1, big_integer(y)) > 0) ? y : x);
-	case T_BIG_RATIO:
-	  return((mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) > 0) ? x : y);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return((mpfr_cmp_q(big_real(y), sc->mpq_1) > 0) ? x : y);
-#endif
-	default:
-	  return(min_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return((mpq_cmp_z(sc->mpq_1, big_integer(y)) > 0) ? y : x);
+        case T_BIG_RATIO:
+          return((mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) > 0) ? x : y);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return((mpfr_cmp_q(big_real(y), sc->mpq_1) > 0) ? x : y);
+#endif
+        default:
+          return(min_out_y(sc, x, y));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(((real(x) <= integer(y)) || (is_NaN(real(x)))) ? x : y);
-	case T_RATIO:
-	  return((real(x) > fraction(y)) ? y : x);
+        {
+        case T_INTEGER:
+          return(((real(x) <= integer(y)) || (is_NaN(real(x)))) ? x : y);
+        case T_RATIO:
+          return((real(x) > fraction(y)) ? y : x);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (is_NaN(real(x))) return(x);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return((mpfr_cmp_z(sc->mpfr_1, big_integer(y)) > 0) ? y : x);
-
-	case T_BIG_RATIO:
-	  if (is_NaN(real(x))) return(x);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return((mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) > 0) ? y : x);
-
-	case T_BIG_REAL:
-	  if (is_NaN(real(x))) return(x);
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_d(big_real(y), real(x)) > 0) ? x : y);
-#endif
-	default:
-	  return(min_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          if (is_NaN(real(x))) return(x);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return((mpfr_cmp_z(sc->mpfr_1, big_integer(y)) > 0) ? y : x);
+
+        case T_BIG_RATIO:
+          if (is_NaN(real(x))) return(x);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return((mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) > 0) ? y : x);
+
+        case T_BIG_REAL:
+          if (is_NaN(real(x))) return(x);
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_d(big_real(y), real(x)) > 0) ? x : y);
+#endif
+        default:
+          return(min_out_y(sc, x, y));
+        }
       break;
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return((mpz_cmp_si(big_integer(x), integer(y)) > 0) ? y : x);
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  return((mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) > 0) ? y : x);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return((mpfr_cmp_d(sc->mpfr_1, real(y)) > 0) ? y : x);
-	case T_BIG_RATIO:
-	  return((mpq_cmp_z(big_ratio(y), big_integer(x)) > 0) ? x : y);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_z(big_real(y), big_integer(x)) > 0) ? x : y);
-	default:
-	  return(min_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return((mpz_cmp_si(big_integer(x), integer(y)) > 0) ? y : x);
+        case T_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          return((mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) > 0) ? y : x);
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return((mpfr_cmp_d(sc->mpfr_1, real(y)) > 0) ? y : x);
+        case T_BIG_RATIO:
+          return((mpq_cmp_z(big_ratio(y), big_integer(x)) > 0) ? x : y);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_z(big_real(y), big_integer(x)) > 0) ? x : y);
+        default:
+          return(min_out_y(sc, x, y));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return((mpq_cmp_si(big_ratio(x), integer(y), 1) > 0) ? y : x);
-	case T_RATIO:
-	  return((mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) > 0) ? y : x);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(y);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return((mpfr_cmp_d(sc->mpfr_1, real(y)) > 0) ? y : x);
-	case T_BIG_INTEGER:
-	  return((mpq_cmp_z(big_ratio(x), big_integer(y)) > 0) ? y : x);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(y);
-	  return((mpfr_cmp_q(big_real(y), big_ratio(x)) > 0) ? x : y);
-	default:
-	  return(min_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return((mpq_cmp_si(big_ratio(x), integer(y), 1) > 0) ? y : x);
+        case T_RATIO:
+          return((mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) > 0) ? y : x);
+        case T_REAL:
+          if (is_NaN(real(y))) return(y);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return((mpfr_cmp_d(sc->mpfr_1, real(y)) > 0) ? y : x);
+        case T_BIG_INTEGER:
+          return((mpq_cmp_z(big_ratio(x), big_integer(y)) > 0) ? y : x);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(y);
+          return((mpfr_cmp_q(big_real(y), big_ratio(x)) > 0) ? x : y);
+        default:
+          return(min_out_y(sc, x, y));
+        }
 
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  return((mpfr_cmp_si(big_real(x), integer(y)) > 0) ? y : x);
-	case T_RATIO:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return((mpfr_cmp_q(big_real(x), sc->mpq_1) > 0) ? y : x);
-	case T_REAL:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  if (is_NaN(real(y))) return(y);
-	  return((mpfr_cmp_d(big_real(x), real(y)) > 0) ? y : x);
-	case T_BIG_INTEGER:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  return((mpfr_cmp_z(big_real(x), big_integer(y)) > 0) ? y : x);
-	case T_BIG_RATIO:
-	  if (mpfr_nan_p(big_real(x))) return(x);
-	  return((mpfr_cmp_q(big_real(x), big_ratio(y)) > 0) ? y : x);
-	default:
-	  return(min_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          return((mpfr_cmp_si(big_real(x), integer(y)) > 0) ? y : x);
+        case T_RATIO:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return((mpfr_cmp_q(big_real(x), sc->mpq_1) > 0) ? y : x);
+        case T_REAL:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          if (is_NaN(real(y))) return(y);
+          return((mpfr_cmp_d(big_real(x), real(y)) > 0) ? y : x);
+        case T_BIG_INTEGER:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          return((mpfr_cmp_z(big_real(x), big_integer(y)) > 0) ? y : x);
+        case T_BIG_RATIO:
+          if (mpfr_nan_p(big_real(x))) return(x);
+          return((mpfr_cmp_q(big_real(x), big_ratio(y)) > 0) ? y : x);
+        default:
+          return(min_out_y(sc, x, y));
+        }
 #endif
     default:
       return(min_out_x(sc, x, y));
@@ -23061,27 +23061,27 @@ static bool num_eq_b_7pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (type(x) == type(y))
     {
       if (is_t_integer(x))
-	return(integer(x) == integer(y));
+        return(integer(x) == integer(y));
       if (is_t_real(x))
-	return(real(x) == real(y));
+        return(real(x) == real(y));
       if (is_t_complex(x))
-	return((real_part(x) == real_part(y)) && (imag_part(x) == imag_part(y)));
+        return((real_part(x) == real_part(y)) && (imag_part(x) == imag_part(y)));
       if (is_t_ratio(x))
-	return((numerator(x) == numerator(y)) && (denominator(x) == denominator(y)));
+        return((numerator(x) == numerator(y)) && (denominator(x) == denominator(y)));
 #if WITH_GMP
       if (is_t_big_integer(x))
-	return(mpz_cmp(big_integer(x), big_integer(y)) == 0);
+        return(mpz_cmp(big_integer(x), big_integer(y)) == 0);
       if (is_t_big_ratio(x))
-	return(mpq_equal(big_ratio(x), big_ratio(y)));
+        return(mpq_equal(big_ratio(x), big_ratio(y)));
       if (is_t_big_real(x))
-	return(mpfr_equal_p(big_real(x), big_real(y)));
+        return(mpfr_equal_p(big_real(x), big_real(y)));
       if (is_t_big_complex(x)) /* mpc_cmp can't handle NaN */
-	{
-	  if ((mpfr_nan_p(mpc_realref(big_complex(x)))) || (mpfr_nan_p(mpc_imagref(big_complex(x)))) ||
-	      (mpfr_nan_p(mpc_realref(big_complex(y)))) || (mpfr_nan_p(mpc_imagref(big_complex(y)))))
-	    return(false);
-	  return(mpc_cmp(big_complex(x), big_complex(y)) == 0);
-	}
+        {
+          if ((mpfr_nan_p(mpc_realref(big_complex(x)))) || (mpfr_nan_p(mpc_imagref(big_complex(x)))) ||
+              (mpfr_nan_p(mpc_realref(big_complex(y)))) || (mpfr_nan_p(mpc_imagref(big_complex(y)))))
+            return(false);
+          return(mpc_cmp(big_complex(x), big_complex(y)) == 0);
+        }
 #endif
     }
 
@@ -23089,166 +23089,166 @@ static bool num_eq_b_7pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:
-	  return(false);
-	case T_REAL:
+        {
+        case T_RATIO:
+          return(false);
+        case T_REAL:
 #if WITH_GMP
-	  if (s7_int_abs(integer(x)) >= INT64_TO_DOUBLE_LIMIT)
-	    {
-	      if (is_NaN(real(y))) return(false);
-	      mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
-	      return(mpfr_cmp_si(sc->mpfr_1, integer(x)) == 0);
-	    }
-#endif
-	  return(integer(x) == real(y));
-	case T_COMPLEX:
-	  return(false);
+          if (s7_int_abs(integer(x)) >= INT64_TO_DOUBLE_LIMIT)
+            {
+              if (is_NaN(real(y))) return(false);
+              mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
+              return(mpfr_cmp_si(sc->mpfr_1, integer(x)) == 0);
+            }
+#endif
+          return(integer(x) == real(y));
+        case T_COMPLEX:
+          return(false);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  return((mpz_fits_slong_p(big_integer(y))) && (integer(x) == mpz_get_si(big_integer(y))));
-	case T_BIG_RATIO:
-	  return(false);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_si(big_real(y), integer(x)) == 0));
-	case T_BIG_COMPLEX:
-	  return(false);
-#endif
-	default: return(eq_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          return((mpz_fits_slong_p(big_integer(y))) && (integer(x) == mpz_get_si(big_integer(y))));
+        case T_BIG_RATIO:
+          return(false);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_si(big_real(y), integer(x)) == 0));
+        case T_BIG_COMPLEX:
+          return(false);
+#endif
+        default: return(eq_out_y(sc, x, y));
+        }
       break;
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER: return(false);
-	case T_REAL:    return(fraction(x) == real(y));
-	case T_COMPLEX: return(false);
+        {
+        case T_INTEGER: return(false);
+        case T_REAL:    return(fraction(x) == real(y));
+        case T_COMPLEX: return(false);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  return(false);
-	case T_BIG_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpq_equal(sc->mpq_1, big_ratio(y)));
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(false);
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpfr_cmp_q(big_real(y), sc->mpq_1) == 0);
-	case T_BIG_COMPLEX:
-	  return(false);
-#endif
-	default: return(eq_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          return(false);
+        case T_BIG_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpq_equal(sc->mpq_1, big_ratio(y)));
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(false);
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpfr_cmp_q(big_real(y), sc->mpq_1) == 0);
+        case T_BIG_COMPLEX:
+          return(false);
+#endif
+        default: return(eq_out_y(sc, x, y));
+        }
       break;
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(real(x) == integer(y));
-	case T_RATIO:
-	  return(real(x) == fraction(y));
-	case T_COMPLEX:
-	  return(false);
+        {
+        case T_INTEGER:
+          return(real(x) == integer(y));
+        case T_RATIO:
+          return(real(x) == fraction(y));
+        case T_COMPLEX:
+          return(false);
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) == 0);
-	case T_BIG_RATIO:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) == 0);
-	case T_BIG_REAL:
-	  if (is_NaN(real(x))) return(false);
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_d(big_real(y), real(x)) == 0));
-	case T_BIG_COMPLEX:
-	  return(false);
-#endif
-	default: return(eq_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) == 0);
+        case T_BIG_RATIO:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) == 0);
+        case T_BIG_REAL:
+          if (is_NaN(real(x))) return(false);
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_d(big_real(y), real(x)) == 0));
+        case T_BIG_COMPLEX:
+          return(false);
+#endif
+        default: return(eq_out_y(sc, x, y));
+        }
       break;
 
     case T_COMPLEX:
       if (is_real(y)) return(false);
 #if WITH_GMP
       if (is_t_big_complex(y))
-	{
-	  if ((is_NaN(real_part(x))) || (is_NaN(imag_part(x))) ||
-	      (mpfr_nan_p(mpc_realref(big_complex(y)))) || (mpfr_nan_p(mpc_imagref(big_complex(y)))))
-	    return(false);
-	  mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
-	  return(mpc_cmp(big_complex(y), sc->mpc_1) == 0);
-	}
+        {
+          if ((is_NaN(real_part(x))) || (is_NaN(imag_part(x))) ||
+              (mpfr_nan_p(mpc_realref(big_complex(y)))) || (mpfr_nan_p(mpc_imagref(big_complex(y)))))
+            return(false);
+          mpc_set_d_d(sc->mpc_1, real_part(x), imag_part(x), MPC_RNDNN);
+          return(mpc_cmp(big_complex(y), sc->mpc_1) == 0);
+        }
 #endif
       return(eq_out_y(sc, x, y));
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return((mpz_fits_slong_p(big_integer(x))) && (integer(y) == mpz_get_si(big_integer(x))));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
-	  return(mpfr_cmp_z(sc->mpfr_1, big_integer(x)) == 0);
-	case T_RATIO: case T_COMPLEX: case T_BIG_RATIO: case T_BIG_COMPLEX:
-	  return(false);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_z(big_real(y), big_integer(x)) == 0));
-	default: return(eq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return((mpz_fits_slong_p(big_integer(x))) && (integer(y) == mpz_get_si(big_integer(x))));
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
+          return(mpfr_cmp_z(sc->mpfr_1, big_integer(x)) == 0);
+        case T_RATIO: case T_COMPLEX: case T_BIG_RATIO: case T_BIG_COMPLEX:
+          return(false);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_z(big_real(y), big_integer(x)) == 0));
+        default: return(eq_out_y(sc, x, y));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return(mpq_equal(sc->mpq_1, big_ratio(x)));
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
-	  return(mpfr_cmp_q(sc->mpfr_1, big_ratio(x)) == 0);
-	case T_INTEGER: case T_BIG_INTEGER: case T_COMPLEX: case T_BIG_COMPLEX:
-	  return(false);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_q(big_real(y), big_ratio(x)) == 0));
-	default: return(eq_out_y(sc, x, y));
-	}
+        {
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return(mpq_equal(sc->mpq_1, big_ratio(x)));
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(y), MPFR_RNDN);
+          return(mpfr_cmp_q(sc->mpfr_1, big_ratio(x)) == 0);
+        case T_INTEGER: case T_BIG_INTEGER: case T_COMPLEX: case T_BIG_COMPLEX:
+          return(false);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_q(big_real(y), big_ratio(x)) == 0));
+        default: return(eq_out_y(sc, x, y));
+        }
 
     case T_BIG_REAL:
       if ((is_number(y)) && (mpfr_nan_p(big_real(x)))) return(false);
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpfr_cmp_si(big_real(x), integer(y)) == 0);
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return(mpfr_cmp_q(big_real(x), sc->mpq_1) == 0);
-	case T_REAL:
-	  return((!is_NaN(real(y))) && (mpfr_cmp_d(big_real(x), real(y)) == 0));
-	case T_BIG_INTEGER:
-	  return(mpfr_cmp_z(big_real(x), big_integer(y)) == 0);
-	case T_BIG_RATIO:
-	  return(mpfr_cmp_q(big_real(x), big_ratio(y)) == 0);
-	case T_COMPLEX: case T_BIG_COMPLEX:
-	  return(false);
-	default: return(eq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpfr_cmp_si(big_real(x), integer(y)) == 0);
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return(mpfr_cmp_q(big_real(x), sc->mpq_1) == 0);
+        case T_REAL:
+          return((!is_NaN(real(y))) && (mpfr_cmp_d(big_real(x), real(y)) == 0));
+        case T_BIG_INTEGER:
+          return(mpfr_cmp_z(big_real(x), big_integer(y)) == 0);
+        case T_BIG_RATIO:
+          return(mpfr_cmp_q(big_real(x), big_ratio(y)) == 0);
+        case T_COMPLEX: case T_BIG_COMPLEX:
+          return(false);
+        default: return(eq_out_y(sc, x, y));
+        }
 
     case T_BIG_COMPLEX:
       switch (type(y))
-	{
-	case T_RATIO: case T_REAL: case T_INTEGER: case T_BIG_INTEGER: case T_BIG_RATIO: case T_BIG_REAL:
-	  return(false);
-	case T_COMPLEX:
-	  if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
-	      (mpfr_nan_p(mpc_realref(big_complex(x)))) || (mpfr_nan_p(mpc_imagref(big_complex(x)))))
-	    return(false);
-	  mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
-	  return(mpc_cmp(big_complex(x), sc->mpc_1) == 0); /* NaN's not allowed! */
-	default: return(eq_out_y(sc, x, y));
-	}
+        {
+        case T_RATIO: case T_REAL: case T_INTEGER: case T_BIG_INTEGER: case T_BIG_RATIO: case T_BIG_REAL:
+          return(false);
+        case T_COMPLEX:
+          if ((is_NaN(real_part(y))) || (is_NaN(imag_part(y))) ||
+              (mpfr_nan_p(mpc_realref(big_complex(x)))) || (mpfr_nan_p(mpc_imagref(big_complex(x)))))
+            return(false);
+          mpc_set_d_d(sc->mpc_1, real_part(y), imag_part(y), MPC_RNDNN);
+          return(mpc_cmp(big_complex(x), sc->mpc_1) == 0); /* NaN's not allowed! */
+        default: return(eq_out_y(sc, x, y));
+        }
 #endif
     default: return(eq_out_x(sc, x, y));
     }
@@ -23263,7 +23263,7 @@ static bool is_number_via_method(s7_scheme *sc, s7_pointer p)
     {
       s7_pointer f = find_method_with_let(sc, p, sc->is_number_symbol);
       if (f != sc->undefined)
-	return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
+        return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
     }
   return(false);
 }
@@ -23280,10 +23280,10 @@ static s7_pointer g_num_eq(s7_scheme *sc, s7_pointer args)
   for (; is_pair(p); p = cdr(p))
     if (!num_eq_b_7pp(sc, x, car(p)))
       {
-	for (p = cdr(p); is_pair(p); p = cdr(p))
-	  if (!is_number_via_method(sc, car(p)))
-	    wrong_type_error_nr(sc, sc->num_eq_symbol, position_of(p, args), car(p), a_number_string);
-	return(sc->F);
+        for (p = cdr(p); is_pair(p); p = cdr(p))
+          if (!is_number_via_method(sc, car(p)))
+            wrong_type_error_nr(sc, sc->num_eq_symbol, position_of(p, args), car(p), a_number_string);
+        return(sc->F);
       }
   return(sc->T);
 }
@@ -23398,127 +23398,127 @@ static bool lt_b_7pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (type(x) == type(y))
     {
       if (is_t_integer(x))
-	return(integer(x) < integer(y));
+        return(integer(x) < integer(y));
       if (is_t_real(x))
-	return(real(x) < real(y));
+        return(real(x) < real(y));
       if (is_t_ratio(x))
-	return(fraction(x) < fraction(y));
+        return(fraction(x) < fraction(y));
 #if WITH_GMP
       if (is_t_big_integer(x))
-	return(mpz_cmp(big_integer(x), big_integer(y)) < 0);
+        return(mpz_cmp(big_integer(x), big_integer(y)) < 0);
       if (is_t_big_ratio(x))
-	return(mpq_cmp(big_ratio(x), big_ratio(y)) < 0);
+        return(mpq_cmp(big_ratio(x), big_ratio(y)) < 0);
       if (is_t_big_real(x))
-	return(mpfr_less_p(big_real(x), big_real(y)));
+        return(mpfr_less_p(big_real(x), big_real(y)));
 #endif
     }
   switch (type(x))
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:	return(integer(x) < fraction(y)); /* ?? */
-	case T_REAL:	return(integer(x) < real(y));
+        {
+        case T_RATIO:        return(integer(x) < fraction(y)); /* ?? */
+        case T_REAL:        return(integer(x) < real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) > 0);
-	case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) > 0);
-	case T_BIG_REAL:    return(mpfr_cmp_si(big_real(y), integer(x)) > 0);
+        case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) > 0);
+        case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) > 0);
+        case T_BIG_REAL:    return(mpfr_cmp_si(big_real(y), integer(x)) > 0);
 #endif
-	default: return(lt_out_y(sc, x, y));
-	}
+        default: return(lt_out_y(sc, x, y));
+        }
       break;
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER: return(fraction(x) < integer(y));
-	case T_REAL:    return(fraction(x) < real(y));
+        {
+        case T_INTEGER: return(fraction(x) < integer(y));
+        case T_REAL:    return(fraction(x) < real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpq_cmp_z(sc->mpq_1, big_integer(y)) < 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) > 0);
-	case T_BIG_REAL:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpfr_cmp_q(big_real(y), sc->mpq_1) > 0);
-#endif
-	default: return(lt_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpq_cmp_z(sc->mpq_1, big_integer(y)) < 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) > 0);
+        case T_BIG_REAL:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpfr_cmp_q(big_real(y), sc->mpq_1) > 0);
+#endif
+        default: return(lt_out_y(sc, x, y));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER: return(real(x) < integer(y));
-	case T_RATIO:	return(real(x) < fraction(y));
+        {
+        case T_INTEGER: return(real(x) < integer(y));
+        case T_RATIO:        return(real(x) < fraction(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) < 0);
-	case T_BIG_RATIO:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) < 0);
-	case T_BIG_REAL:
-	  return(mpfr_cmp_d(big_real(y), real(x)) > 0);
-#endif
-	default: return(lt_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) < 0);
+        case T_BIG_RATIO:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) < 0);
+        case T_BIG_REAL:
+          return(mpfr_cmp_d(big_real(y), real(x)) > 0);
+#endif
+        default: return(lt_out_y(sc, x, y));
+        }
       break;
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpz_cmp_si(big_integer(x), integer(y)) < 0);
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) < 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) < 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_z(big_ratio(y), big_integer(x)) > 0);
-	case T_BIG_REAL:
-	  return(mpfr_cmp_z(big_real(y), big_integer(x)) > 0);
-	default: return(lt_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpz_cmp_si(big_integer(x), integer(y)) < 0);
+        case T_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) < 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) < 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_z(big_ratio(y), big_integer(x)) > 0);
+        case T_BIG_REAL:
+          return(mpfr_cmp_z(big_real(y), big_integer(x)) > 0);
+        default: return(lt_out_y(sc, x, y));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpq_cmp_si(big_ratio(x), integer(y), 1) < 0);
-	case T_RATIO:
-	  return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) < 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) < 0);
-	case T_BIG_INTEGER:
-	  return(mpq_cmp_z(big_ratio(x), big_integer(y)) < 0);
-	case T_BIG_REAL:
-	  return(mpfr_cmp_q(big_real(y), big_ratio(x)) > 0);
-	default: return(lt_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpq_cmp_si(big_ratio(x), integer(y), 1) < 0);
+        case T_RATIO:
+          return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) < 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) < 0);
+        case T_BIG_INTEGER:
+          return(mpq_cmp_z(big_ratio(x), big_integer(y)) < 0);
+        case T_BIG_REAL:
+          return(mpfr_cmp_q(big_real(y), big_ratio(x)) > 0);
+        default: return(lt_out_y(sc, x, y));
+        }
 
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpfr_cmp_si(big_real(x), integer(y)) < 0);
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return(mpfr_cmp_q(big_real(x), sc->mpq_1) < 0);
-	case T_REAL:
-	  return(mpfr_cmp_d(big_real(x), real(y)) < 0);
-	case T_BIG_INTEGER:
-	  return(mpfr_cmp_z(big_real(x), big_integer(y)) < 0);
-	case T_BIG_RATIO:
-	  return(mpfr_cmp_q(big_real(x), big_ratio(y)) < 0);
-	default: return(lt_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpfr_cmp_si(big_real(x), integer(y)) < 0);
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return(mpfr_cmp_q(big_real(x), sc->mpq_1) < 0);
+        case T_REAL:
+          return(mpfr_cmp_d(big_real(x), real(y)) < 0);
+        case T_BIG_INTEGER:
+          return(mpfr_cmp_z(big_real(x), big_integer(y)) < 0);
+        case T_BIG_RATIO:
+          return(mpfr_cmp_q(big_real(x), big_ratio(y)) < 0);
+        default: return(lt_out_y(sc, x, y));
+        }
 #endif
     default: return(lt_out_x(sc, x, y));
     }
@@ -23537,12 +23537,12 @@ static s7_pointer g_less(s7_scheme *sc, s7_pointer args)
   for (; is_pair(p); p = cdr(p))
     {
       if (!lt_b_7pp(sc, x, car(p)))
-	{
-	  for (p = cdr(p); is_pair(p); p = cdr(p))
-	    if (!is_real_via_method(sc, car(p)))
-	      wrong_type_error_nr(sc, sc->lt_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
-	  return(sc->F);
-	}
+        {
+          for (p = cdr(p); is_pair(p); p = cdr(p))
+            if (!is_real_via_method(sc, car(p)))
+              wrong_type_error_nr(sc, sc->lt_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
+          return(sc->F);
+        }
       x = car(p);
     }
   return(sc->T);
@@ -23660,9 +23660,9 @@ static s7_pointer less_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_poi
   if (is_t_integer(arg2))
     {
       if (integer(arg2) == 0)
-	return(sc->less_x0);
+        return(sc->less_x0);
       if ((integer(arg2) < S7_INT32_MAX) && (integer(arg2) > S7_INT32_MIN))
-	return(sc->less_xi);
+        return(sc->less_xi);
     }
   if (is_t_real(arg2))
     return(sc->less_xf);
@@ -23692,132 +23692,132 @@ static bool leq_b_7pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (type(x) == type(y))
     {
       if (is_t_integer(x))
-	return(integer(x) <= integer(y));
+        return(integer(x) <= integer(y));
       if (is_t_real(x))
-	return(real(x) <= real(y));
+        return(real(x) <= real(y));
       if (is_t_ratio(x))
-	return(fraction(x) <= fraction(y));
+        return(fraction(x) <= fraction(y));
 #if WITH_GMP
       if (is_t_big_integer(x))
-	return(mpz_cmp(big_integer(x), big_integer(y)) <= 0);
+        return(mpz_cmp(big_integer(x), big_integer(y)) <= 0);
       if (is_t_big_ratio(x))
-	return(mpq_cmp(big_ratio(x), big_ratio(y)) <= 0);
+        return(mpq_cmp(big_ratio(x), big_ratio(y)) <= 0);
       if (is_t_big_real(x))
-	return(mpfr_lessequal_p(big_real(x), big_real(y)));
+        return(mpfr_lessequal_p(big_real(x), big_real(y)));
 #endif
     }
   switch (type(x))
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:	return(integer(x) <= fraction(y)); /* ?? */
-	case T_REAL:	return(integer(x) <= real(y));
+        {
+        case T_RATIO:        return(integer(x) <= fraction(y)); /* ?? */
+        case T_REAL:        return(integer(x) <= real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) >= 0);
-	case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) >= 0);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_si(big_real(y), integer(x)) >= 0));
+        case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) >= 0);
+        case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) >= 0);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_si(big_real(y), integer(x)) >= 0));
 #endif
-	default: return(leq_out_y(sc, x, y));
-	}
+        default: return(leq_out_y(sc, x, y));
+        }
       break;
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER: return(fraction(x) <= integer(y));
-	case T_REAL:    return(fraction(x) <= real(y));
+        {
+        case T_INTEGER: return(fraction(x) <= integer(y));
+        case T_REAL:    return(fraction(x) <= real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpq_cmp_z(sc->mpq_1, big_integer(y)) <= 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) >= 0);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(false);
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpfr_cmp_q(big_real(y), sc->mpq_1) >= 0);
-#endif
-	default: return(leq_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpq_cmp_z(sc->mpq_1, big_integer(y)) <= 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) >= 0);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(false);
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpfr_cmp_q(big_real(y), sc->mpq_1) >= 0);
+#endif
+        default: return(leq_out_y(sc, x, y));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER: return(real(x) <= integer(y));
-	case T_RATIO:	return(real(x) <= fraction(y));
+        {
+        case T_INTEGER: return(real(x) <= integer(y));
+        case T_RATIO:        return(real(x) <= fraction(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) <= 0);
-	case T_BIG_RATIO:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) <= 0);
-	case T_BIG_REAL:
-	  if (is_NaN(real(x))) return(false);
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_d(big_real(y), real(x)) >= 0));
-#endif
-	default: return(leq_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) <= 0);
+        case T_BIG_RATIO:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) <= 0);
+        case T_BIG_REAL:
+          if (is_NaN(real(x))) return(false);
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_d(big_real(y), real(x)) >= 0));
+#endif
+        default: return(leq_out_y(sc, x, y));
+        }
       break;
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpz_cmp_si(big_integer(x), integer(y)) <= 0);
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) <= 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) <= 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_z(big_ratio(y), big_integer(x)) >= 0);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_z(big_real(y), big_integer(x)) >= 0));
-	default: return(leq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpz_cmp_si(big_integer(x), integer(y)) <= 0);
+        case T_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) <= 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) <= 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_z(big_ratio(y), big_integer(x)) >= 0);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_z(big_real(y), big_integer(x)) >= 0));
+        default: return(leq_out_y(sc, x, y));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpq_cmp_si(big_ratio(x), integer(y), 1) <= 0);
-	case T_RATIO:
-	  return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) <= 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) <= 0);
-	case T_BIG_INTEGER:
-	  return(mpq_cmp_z(big_ratio(x), big_integer(y)) <= 0);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_q(big_real(y), big_ratio(x)) >= 0));
-	default: return(leq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpq_cmp_si(big_ratio(x), integer(y), 1) <= 0);
+        case T_RATIO:
+          return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) <= 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) <= 0);
+        case T_BIG_INTEGER:
+          return(mpq_cmp_z(big_ratio(x), big_integer(y)) <= 0);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_q(big_real(y), big_ratio(x)) >= 0));
+        default: return(leq_out_y(sc, x, y));
+        }
 
     case T_BIG_REAL:
       if ((is_real(y)) && (mpfr_nan_p(big_real(x)))) return(false);
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpfr_cmp_si(big_real(x), integer(y)) <= 0);
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return(mpfr_cmp_q(big_real(x), sc->mpq_1) <= 0);
-	case T_REAL:
-	  return((!is_NaN(real(y))) && (mpfr_cmp_d(big_real(x), real(y)) <= 0));
-	case T_BIG_INTEGER:
-	  return(mpfr_cmp_z(big_real(x), big_integer(y)) <= 0);
-	case T_BIG_RATIO:
-	  return(mpfr_cmp_q(big_real(x), big_ratio(y)) <= 0);
-	default: return(leq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpfr_cmp_si(big_real(x), integer(y)) <= 0);
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return(mpfr_cmp_q(big_real(x), sc->mpq_1) <= 0);
+        case T_REAL:
+          return((!is_NaN(real(y))) && (mpfr_cmp_d(big_real(x), real(y)) <= 0));
+        case T_BIG_INTEGER:
+          return(mpfr_cmp_z(big_real(x), big_integer(y)) <= 0);
+        case T_BIG_RATIO:
+          return(mpfr_cmp_q(big_real(x), big_ratio(y)) <= 0);
+        default: return(leq_out_y(sc, x, y));
+        }
 #endif
     default: return(leq_out_x(sc, x, y));
     }
@@ -23837,10 +23837,10 @@ static s7_pointer g_less_or_equal(s7_scheme *sc, s7_pointer args)
   for (; is_pair(p); x = car(p), p = cdr(p))
     if (!leq_b_7pp(sc, x, car(p)))
       {
-	for (p = cdr(p); is_pair(p); p = cdr(p))
-	  if (!is_real_via_method(sc, car(p)))
-	    wrong_type_error_nr(sc, sc->leq_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
-	return(sc->F);
+        for (p = cdr(p); is_pair(p); p = cdr(p))
+          if (!is_real_via_method(sc, car(p)))
+            wrong_type_error_nr(sc, sc->leq_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
+        return(sc->F);
       }
   return(sc->T);
 }
@@ -23916,13 +23916,13 @@ static s7_pointer g_leq_ixx(s7_scheme *sc, s7_pointer args)
   if (is_t_integer(car(p)))
     {
       if (integer(car(args)) > integer(car(p)))
-	{
-	  if (!is_real_via_method(sc, cadr(p)))
-	    wrong_type_error_nr(sc, sc->leq_symbol, 3, cadr(p), sc->type_names[T_REAL]);
-	  return(sc->F);
-	}
+        {
+          if (!is_real_via_method(sc, cadr(p)))
+            wrong_type_error_nr(sc, sc->leq_symbol, 3, cadr(p), sc->type_names[T_REAL]);
+          return(sc->F);
+        }
       if (is_t_integer(cadr(p)))
-	return((integer(car(p)) > integer(cadr(p))) ? sc->F : sc->T);
+        return((integer(car(p)) > integer(cadr(p))) ? sc->F : sc->T);
     }
   return(g_less_or_equal(sc, args));
 }
@@ -23934,7 +23934,7 @@ static s7_pointer leq_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_poin
     {
       arg2 = caddr(expr);
       if ((is_t_integer(arg2)) && (integer(arg2) < S7_INT32_MAX) && (integer(arg2) > S7_INT32_MIN))
-	return(sc->leq_xi);
+        return(sc->leq_xi);
       return(sc->leq_2);
     }
   if ((args == 3) && (is_t_integer(cadr(expr))))
@@ -23965,126 +23965,126 @@ static bool gt_b_7pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (type(x) == type(y))
     {
       if (is_t_integer(x))
-	return(integer(x) > integer(y));
+        return(integer(x) > integer(y));
       if (is_t_real(x))
-	return(real(x) > real(y));
+        return(real(x) > real(y));
       if (is_t_ratio(x))
-	return(fraction(x) > fraction(y));
+        return(fraction(x) > fraction(y));
 #if WITH_GMP
       if (is_t_big_integer(x))
-	return(mpz_cmp(big_integer(x), big_integer(y)) > 0);
+        return(mpz_cmp(big_integer(x), big_integer(y)) > 0);
       if (is_t_big_ratio(x))
-	return(mpq_cmp(big_ratio(x), big_ratio(y)) > 0);
+        return(mpq_cmp(big_ratio(x), big_ratio(y)) > 0);
       if (is_t_big_real(x))
-	return(mpfr_greater_p(big_real(x), big_real(y)));
+        return(mpfr_greater_p(big_real(x), big_real(y)));
 #endif
     }
   switch (type(x))
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:	return(integer(x) > fraction(y)); /* ?? */
-	case T_REAL:	return(integer(x) > real(y));
+        {
+        case T_RATIO:        return(integer(x) > fraction(y)); /* ?? */
+        case T_REAL:        return(integer(x) > real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) < 0);
-	case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) < 0);
-	case T_BIG_REAL:    return(mpfr_cmp_si(big_real(y), integer(x)) < 0);
+        case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) < 0);
+        case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) < 0);
+        case T_BIG_REAL:    return(mpfr_cmp_si(big_real(y), integer(x)) < 0);
 #endif
-	default: return(gt_out_y(sc, x, y));
-	}
+        default: return(gt_out_y(sc, x, y));
+        }
       break;
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER: return(fraction(x) > integer(y));
-	case T_REAL:    return(fraction(x) > real(y));
+        {
+        case T_INTEGER: return(fraction(x) > integer(y));
+        case T_REAL:    return(fraction(x) > real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpq_cmp_z(sc->mpq_1, big_integer(y)) > 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) < 0);
-	case T_BIG_REAL:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpfr_cmp_q(big_real(y), sc->mpq_1) < 0);
-#endif
-	default: return(gt_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpq_cmp_z(sc->mpq_1, big_integer(y)) > 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) < 0);
+        case T_BIG_REAL:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpfr_cmp_q(big_real(y), sc->mpq_1) < 0);
+#endif
+        default: return(gt_out_y(sc, x, y));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER: return(real(x) > integer(y));
-	case T_RATIO:	return(real(x) > fraction(y));
+        {
+        case T_INTEGER: return(real(x) > integer(y));
+        case T_RATIO:        return(real(x) > fraction(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) > 0);
-	case T_BIG_RATIO:
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) > 0);
-	case T_BIG_REAL:
-	  return(mpfr_cmp_d(big_real(y), real(x)) < 0);
-#endif
-	default: return(gt_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) > 0);
+        case T_BIG_RATIO:
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) > 0);
+        case T_BIG_REAL:
+          return(mpfr_cmp_d(big_real(y), real(x)) < 0);
+#endif
+        default: return(gt_out_y(sc, x, y));
+        }
       break;
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpz_cmp_si(big_integer(x), integer(y)) > 0);
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) > 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) > 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_z(big_ratio(y), big_integer(x)) < 0);
-	case T_BIG_REAL:
-	  return(mpfr_cmp_z(big_real(y), big_integer(x)) < 0);
-	default: return(gt_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpz_cmp_si(big_integer(x), integer(y)) > 0);
+        case T_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) > 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) > 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_z(big_ratio(y), big_integer(x)) < 0);
+        case T_BIG_REAL:
+          return(mpfr_cmp_z(big_real(y), big_integer(x)) < 0);
+        default: return(gt_out_y(sc, x, y));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpq_cmp_si(big_ratio(x), integer(y), 1) > 0);
-	case T_RATIO:
-	  return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) > 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) > 0);
-	case T_BIG_INTEGER:
-	  return(mpq_cmp_z(big_ratio(x), big_integer(y)) > 0);
-	case T_BIG_REAL:
-	  return(mpfr_cmp_q(big_real(y), big_ratio(x)) < 0);
-	default: return(gt_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpq_cmp_si(big_ratio(x), integer(y), 1) > 0);
+        case T_RATIO:
+          return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) > 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) > 0);
+        case T_BIG_INTEGER:
+          return(mpq_cmp_z(big_ratio(x), big_integer(y)) > 0);
+        case T_BIG_REAL:
+          return(mpfr_cmp_q(big_real(y), big_ratio(x)) < 0);
+        default: return(gt_out_y(sc, x, y));
+        }
     case T_BIG_REAL:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpfr_cmp_si(big_real(x), integer(y)) > 0);
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return(mpfr_cmp_q(big_real(x), sc->mpq_1) > 0);
-	case T_REAL:
-	  return(mpfr_cmp_d(big_real(x), real(y)) > 0);
-	case T_BIG_INTEGER:
-	  return(mpfr_cmp_z(big_real(x), big_integer(y)) > 0);
-	case T_BIG_RATIO:
-	  return(mpfr_cmp_q(big_real(x), big_ratio(y)) > 0);
-	default: return(gt_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpfr_cmp_si(big_real(x), integer(y)) > 0);
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return(mpfr_cmp_q(big_real(x), sc->mpq_1) > 0);
+        case T_REAL:
+          return(mpfr_cmp_d(big_real(x), real(y)) > 0);
+        case T_BIG_INTEGER:
+          return(mpfr_cmp_z(big_real(x), big_integer(y)) > 0);
+        case T_BIG_RATIO:
+          return(mpfr_cmp_q(big_real(x), big_ratio(y)) > 0);
+        default: return(gt_out_y(sc, x, y));
+        }
 #endif
     default: return(gt_out_x(sc, x, y));
     }
@@ -24104,10 +24104,10 @@ static s7_pointer g_greater(s7_scheme *sc, s7_pointer args)
   for (; is_pair(p); x = car(p), p = cdr(p))
     if (!gt_b_7pp(sc, x, car(p)))
       {
-	for (p = cdr(p); is_pair(p); p = cdr(p))
-	  if (!is_real_via_method(sc, car(p)))
-	    wrong_type_error_nr(sc, sc->gt_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
-	return(sc->F);
+        for (p = cdr(p); is_pair(p); p = cdr(p))
+          if (!is_real_via_method(sc, car(p)))
+            wrong_type_error_nr(sc, sc->gt_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
+        return(sc->F);
       }
   return(sc->T);
 }
@@ -24149,7 +24149,7 @@ static s7_pointer g_greater_xf(s7_scheme *sc, s7_pointer args)
     case T_RATIO:
       /* (> 9223372036854775807/9223372036854775806 1.0) */
       if (denominator(x) < S7_INT32_MAX) /* y range check was handled in greater_chooser */
-	return(make_boolean(sc, (numerator(x) > (y * denominator(x)))));
+        return(make_boolean(sc, (numerator(x) > (y * denominator(x)))));
       return(make_boolean(sc, fraction(x) > y));
 
 #if WITH_GMP
@@ -24206,30 +24206,30 @@ static s7_pointer g_greater_2(s7_scheme *sc, s7_pointer args)
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:   return(gt_p_pp(sc, x, y));
-	case T_REAL:    return(make_boolean(sc, integer(x) > real(y)));
+        {
+        case T_RATIO:   return(gt_p_pp(sc, x, y));
+        case T_REAL:    return(make_boolean(sc, integer(x) > real(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER: case T_BIG_RATIO: case T_BIG_REAL:
-	  return(gt_p_pp(sc, x, y));
+        case T_BIG_INTEGER: case T_BIG_RATIO: case T_BIG_REAL:
+          return(gt_p_pp(sc, x, y));
 #endif
-	default:        return(make_boolean(sc, gt_out_y(sc, x, y)));
-	}
+        default:        return(make_boolean(sc, gt_out_y(sc, x, y)));
+        }
       break;
 
     case T_RATIO:       return(gt_p_pp(sc, x, y));
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER: return(make_boolean(sc, real(x) > integer(y)));
-	case T_RATIO:   return(make_boolean(sc, real(x) > fraction(y)));
+        {
+        case T_INTEGER: return(make_boolean(sc, real(x) > integer(y)));
+        case T_RATIO:   return(make_boolean(sc, real(x) > fraction(y)));
 #if WITH_GMP
-	case T_BIG_INTEGER: case T_BIG_RATIO: case T_BIG_REAL:
-	  return(gt_p_pp(sc, x, y));
+        case T_BIG_INTEGER: case T_BIG_RATIO: case T_BIG_REAL:
+          return(gt_p_pp(sc, x, y));
 #endif
-	default:        return(make_boolean(sc, gt_out_y(sc, x, y)));
-	}
+        default:        return(make_boolean(sc, gt_out_y(sc, x, y)));
+        }
       break;
 #if WITH_GMP
     case T_BIG_INTEGER: case T_BIG_RATIO: case T_BIG_REAL:
@@ -24274,132 +24274,132 @@ static bool geq_b_7pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
   if (type(x) == type(y))
     {
       if (is_t_integer(x))
-	return(integer(x) >= integer(y));
+        return(integer(x) >= integer(y));
       if (is_t_real(x))
-	return(real(x) >= real(y));
+        return(real(x) >= real(y));
       if (is_t_ratio(x))
-	return(fraction(x) >= fraction(y));
+        return(fraction(x) >= fraction(y));
 #if WITH_GMP
       if (is_t_big_integer(x))
-	return(mpz_cmp(big_integer(x), big_integer(y)) >= 0);
+        return(mpz_cmp(big_integer(x), big_integer(y)) >= 0);
       if (is_t_big_ratio(x))
-	return(mpq_cmp(big_ratio(x), big_ratio(y)) >= 0);
+        return(mpq_cmp(big_ratio(x), big_ratio(y)) >= 0);
       if (is_t_big_real(x))
-	return(mpfr_greaterequal_p(big_real(x), big_real(y)));
+        return(mpfr_greaterequal_p(big_real(x), big_real(y)));
 #endif
     }
   switch (type(x))
     {
     case T_INTEGER:
       switch (type(y))
-	{
-	case T_RATIO:	return(integer(x) >= fraction(y)); /* ?? */
-	case T_REAL:	return(integer(x) >= real(y));
+        {
+        case T_RATIO:        return(integer(x) >= fraction(y)); /* ?? */
+        case T_REAL:        return(integer(x) >= real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) <= 0);
-	case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) <= 0);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_si(big_real(y), integer(x)) <= 0));
+        case T_BIG_INTEGER: return(mpz_cmp_si(big_integer(y), integer(x)) <= 0);
+        case T_BIG_RATIO:   return(mpq_cmp_si(big_ratio(y), integer(x), 1) <= 0);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_si(big_real(y), integer(x)) <= 0));
 #endif
-	default: return(geq_out_y(sc, x, y));
-	}
+        default: return(geq_out_y(sc, x, y));
+        }
       break;
 
     case T_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER: return(fraction(x) >= integer(y));
-	case T_REAL:    return(fraction(x) >= real(y));
+        {
+        case T_INTEGER: return(fraction(x) >= integer(y));
+        case T_REAL:    return(fraction(x) >= real(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpq_cmp_z(sc->mpq_1, big_integer(y)) >= 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) <= 0);
-	case T_BIG_REAL:
-	  if (mpfr_nan_p(big_real(y))) return(false);
-	  mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
-	  return(mpfr_cmp_q(big_real(y), sc->mpq_1) <= 0);
-#endif
-	default: return(geq_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpq_cmp_z(sc->mpq_1, big_integer(y)) >= 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_si(big_ratio(y), numerator(x), denominator(x)) <= 0);
+        case T_BIG_REAL:
+          if (mpfr_nan_p(big_real(y))) return(false);
+          mpq_set_si(sc->mpq_1, numerator(x), denominator(x));
+          return(mpfr_cmp_q(big_real(y), sc->mpq_1) <= 0);
+#endif
+        default: return(geq_out_y(sc, x, y));
+        }
 
     case T_REAL:
       switch (type(y))
-	{
-	case T_INTEGER: return(real(x) >= integer(y));
-	case T_RATIO:	return(real(x) >= fraction(y));
+        {
+        case T_INTEGER: return(real(x) >= integer(y));
+        case T_RATIO:        return(real(x) >= fraction(y));
 #if WITH_GMP
-	case T_BIG_INTEGER:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) >= 0);
-	case T_BIG_RATIO:
-	  if (is_NaN(real(x))) return(false);
-	  mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
-	  return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) >= 0);
-	case T_BIG_REAL:
-	  if (is_NaN(real(x))) return(false);
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_d(big_real(y), real(x)) <= 0));
-#endif
-	default: return(geq_out_y(sc, x, y));
-	}
+        case T_BIG_INTEGER:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_z(sc->mpfr_1, big_integer(y)) >= 0);
+        case T_BIG_RATIO:
+          if (is_NaN(real(x))) return(false);
+          mpfr_set_d(sc->mpfr_1, real(x), MPFR_RNDN);
+          return(mpfr_cmp_q(sc->mpfr_1, big_ratio(y)) >= 0);
+        case T_BIG_REAL:
+          if (is_NaN(real(x))) return(false);
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_d(big_real(y), real(x)) <= 0));
+#endif
+        default: return(geq_out_y(sc, x, y));
+        }
       break;
 
 #if WITH_GMP
     case T_BIG_INTEGER:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpz_cmp_si(big_integer(x), integer(y)) >= 0);
-	case T_RATIO:
-	  mpq_set_z(sc->mpq_1, big_integer(x));
-	  return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) >= 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) >= 0);
-	case T_BIG_RATIO:
-	  return(mpq_cmp_z(big_ratio(y), big_integer(x)) <= 0);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_z(big_real(y), big_integer(x)) <= 0));
-	default: return(geq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpz_cmp_si(big_integer(x), integer(y)) >= 0);
+        case T_RATIO:
+          mpq_set_z(sc->mpq_1, big_integer(x));
+          return(mpq_cmp_si(sc->mpq_1, numerator(y), denominator(y)) >= 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_z(sc->mpfr_1, big_integer(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) >= 0);
+        case T_BIG_RATIO:
+          return(mpq_cmp_z(big_ratio(y), big_integer(x)) <= 0);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_z(big_real(y), big_integer(x)) <= 0));
+        default: return(geq_out_y(sc, x, y));
+        }
     case T_BIG_RATIO:
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpq_cmp_si(big_ratio(x), integer(y), 1) >= 0);
-	case T_RATIO:
-	  return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) >= 0);
-	case T_REAL:
-	  if (is_NaN(real(y))) return(false);
-	  mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
-	  return(mpfr_cmp_d(sc->mpfr_1, real(y)) >= 0);
-	case T_BIG_INTEGER:
-	  return(mpq_cmp_z(big_ratio(x), big_integer(y)) >= 0);
-	case T_BIG_REAL:
-	  return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_q(big_real(y), big_ratio(x)) <= 0));
-	default: return(geq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpq_cmp_si(big_ratio(x), integer(y), 1) >= 0);
+        case T_RATIO:
+          return(mpq_cmp_si(big_ratio(x), numerator(y), denominator(y)) >= 0);
+        case T_REAL:
+          if (is_NaN(real(y))) return(false);
+          mpfr_set_q(sc->mpfr_1, big_ratio(x), MPFR_RNDN);
+          return(mpfr_cmp_d(sc->mpfr_1, real(y)) >= 0);
+        case T_BIG_INTEGER:
+          return(mpq_cmp_z(big_ratio(x), big_integer(y)) >= 0);
+        case T_BIG_REAL:
+          return((!mpfr_nan_p(big_real(y))) && (mpfr_cmp_q(big_real(y), big_ratio(x)) <= 0));
+        default: return(geq_out_y(sc, x, y));
+        }
 
     case T_BIG_REAL:
       if ((is_real(y)) && (mpfr_nan_p(big_real(x)))) return(false);
       switch (type(y))
-	{
-	case T_INTEGER:
-	  return(mpfr_cmp_si(big_real(x), integer(y)) >= 0);
-	case T_RATIO:
-	  mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
-	  return(mpfr_cmp_q(big_real(x), sc->mpq_1) >= 0);
-	case T_REAL:
-	  return((!is_NaN(real(y))) && (mpfr_cmp_d(big_real(x), real(y)) >= 0));
-	case T_BIG_INTEGER:
-	  return(mpfr_cmp_z(big_real(x), big_integer(y)) >= 0);
-	case T_BIG_RATIO:
-	  return(mpfr_cmp_q(big_real(x), big_ratio(y)) >= 0);
-	default: return(geq_out_y(sc, x, y));
-	}
+        {
+        case T_INTEGER:
+          return(mpfr_cmp_si(big_real(x), integer(y)) >= 0);
+        case T_RATIO:
+          mpq_set_si(sc->mpq_1, numerator(y), denominator(y));
+          return(mpfr_cmp_q(big_real(x), sc->mpq_1) >= 0);
+        case T_REAL:
+          return((!is_NaN(real(y))) && (mpfr_cmp_d(big_real(x), real(y)) >= 0));
+        case T_BIG_INTEGER:
+          return(mpfr_cmp_z(big_real(x), big_integer(y)) >= 0);
+        case T_BIG_RATIO:
+          return(mpfr_cmp_q(big_real(x), big_ratio(y)) >= 0);
+        default: return(geq_out_y(sc, x, y));
+        }
 #endif
     default: return(geq_out_x(sc, x, y));
     }
@@ -24418,10 +24418,10 @@ static s7_pointer g_greater_or_equal(s7_scheme *sc, s7_pointer args)
   for (; is_pair(p); x = car(p), p = cdr(p))
     if (!geq_b_7pp(sc, x, car(p)))
       {
-	for (p = cdr(p); is_pair(p); p = cdr(p))
-	  if (!is_real_via_method(sc, car(p)))
-	    wrong_type_error_nr(sc, sc->geq_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
-	return(sc->F);
+        for (p = cdr(p); is_pair(p); p = cdr(p))
+          if (!is_real_via_method(sc, car(p)))
+            wrong_type_error_nr(sc, sc->geq_symbol, position_of(p, args), car(p), sc->type_names[T_REAL]);
+        return(sc->F);
       }
   return(sc->T);
 }
@@ -24511,7 +24511,7 @@ s7_double s7_real_part(s7_pointer x)
 #if WITH_GMP
     case T_BIG_INTEGER: return((s7_double)mpz_get_si(big_integer(x)));
     case T_BIG_RATIO:   return((s7_double)((long_double)mpz_get_si(mpq_numref(big_ratio(x))) /
-					   (long_double)mpz_get_si(mpq_denref(big_ratio(x)))));
+                                           (long_double)mpz_get_si(mpq_denref(big_ratio(x)))));
     case T_BIG_REAL:    return((s7_double)mpfr_get_d(big_real(x), MPFR_RNDN));
     case T_BIG_COMPLEX: return((s7_double)mpfr_get_d(mpc_realref(big_complex(x)), MPFR_RNDN));
 #endif
@@ -24540,12 +24540,12 @@ static s7_pointer real_part_p_p(s7_scheme *sc, s7_pointer p)
       return(p);
     case T_BIG_COMPLEX:
       {
-	s7_pointer x;
-	new_cell(sc, x, T_BIG_REAL);
-	big_real_bgf(x) = alloc_bigflt(sc);
-	add_big_real(sc, x);
-	mpc_real(big_real(x), big_complex(p), MPFR_RNDN);
-	return(x);
+        s7_pointer x;
+        new_cell(sc, x, T_BIG_REAL);
+        big_real_bgf(x) = alloc_bigflt(sc);
+        add_big_real(sc, x);
+        mpc_real(big_real(x), big_complex(p), MPFR_RNDN);
+        return(x);
       }
 #endif
     default:
@@ -24598,12 +24598,12 @@ static s7_pointer imag_part_p_p(s7_scheme *sc, s7_pointer p)
       return(real_zero);
     case T_BIG_COMPLEX:
       {
-	s7_pointer x;
-	new_cell(sc, x, T_BIG_REAL);
-	big_real_bgf(x) = alloc_bigflt(sc);
-	add_big_real(sc, x);
-	mpc_imag(big_real(x), big_complex(p), MPFR_RNDN);
-	return(x);
+        s7_pointer x;
+        new_cell(sc, x, T_BIG_REAL);
+        big_real_bgf(x) = alloc_bigflt(sc);
+        add_big_real(sc, x);
+        mpc_imag(big_real(x), big_complex(p), MPFR_RNDN);
+        return(x);
       }
 #endif
     default:
@@ -24772,7 +24772,7 @@ static bool is_nan_b_7p(s7_scheme *sc, s7_pointer x)
 #endif
     default:
       if (is_number(x))
-	return(method_or_bust_p(sc, x, sc->is_nan_symbol, a_number_string) != sc->F);
+        return(method_or_bust_p(sc, x, sc->is_nan_symbol, a_number_string) != sc->F);
     }
   return(false);
 }
@@ -24800,11 +24800,11 @@ static bool is_infinite_b_7p(s7_scheme *sc, s7_pointer x)
     case T_BIG_REAL:  return(mpfr_inf_p(big_real(x)) != 0);
     case T_BIG_COMPLEX:
       return((mpfr_inf_p(mpc_realref(big_complex(x))) != 0) ||
-	     (mpfr_inf_p(mpc_imagref(big_complex(x))) != 0));
+             (mpfr_inf_p(mpc_imagref(big_complex(x))) != 0));
 #endif
     default:
       if (is_number(x))
-	return(method_or_bust_p(sc, x, sc->is_infinite_symbol, a_number_string) != sc->F);
+        return(method_or_bust_p(sc, x, sc->is_infinite_symbol, a_number_string) != sc->F);
     }
   return(false);
 }
@@ -25009,15 +25009,15 @@ static s7_pointer exact_to_inexact_p_p(s7_scheme *sc, s7_pointer x)
     case T_INTEGER:
 #if WITH_GMP
       if ((integer(x) > INT64_TO_DOUBLE_LIMIT) || (integer(x) < -INT64_TO_DOUBLE_LIMIT))
-	return(s7_number_to_big_real(sc, x));
+        return(s7_number_to_big_real(sc, x));
 #endif
       return(make_real(sc, (s7_double)(integer(x))));
 
     case T_RATIO:
 #if WITH_GMP
       if ((numerator(x) > INT64_TO_DOUBLE_LIMIT) || (numerator(x) < -INT64_TO_DOUBLE_LIMIT) ||
- 	  (denominator(x) > INT64_TO_DOUBLE_LIMIT))  /* just a guess */
-	return(s7_number_to_big_real(sc, x));
+           (denominator(x) > INT64_TO_DOUBLE_LIMIT))  /* just a guess */
+        return(s7_number_to_big_real(sc, x));
 #endif
       return(make_real(sc, (s7_double)(fraction(x))));
 
@@ -25058,22 +25058,22 @@ static s7_pointer inexact_to_exact_p_p(s7_scheme *sc, s7_pointer x)
 
     case T_REAL:
       {
-	s7_int numer = 0, denom = 1;
-	s7_double val = real(x);
-	if ((is_inf(val)) || (is_NaN(val)))
-	  sole_arg_wrong_type_error_nr(sc, sc->inexact_to_exact_symbol, x, a_normal_real_string);
+        s7_int numer = 0, denom = 1;
+        s7_double val = real(x);
+        if ((is_inf(val)) || (is_NaN(val)))
+          sole_arg_wrong_type_error_nr(sc, sc->inexact_to_exact_symbol, x, a_normal_real_string);
 
-	if ((val > DOUBLE_TO_INT64_LIMIT) || (val < -(DOUBLE_TO_INT64_LIMIT)))
-	  {
+        if ((val > DOUBLE_TO_INT64_LIMIT) || (val < -(DOUBLE_TO_INT64_LIMIT)))
+          {
 #if WITH_GMP
-	    return(big_rationalize(sc, set_plist_1(sc, x))); /* this can handle t_real as well as t_big_real */
+            return(big_rationalize(sc, set_plist_1(sc, x))); /* this can handle t_real as well as t_big_real */
 #else
-	    sole_arg_out_of_range_error_nr(sc, sc->inexact_to_exact_symbol, x, it_is_too_large_string);
+            sole_arg_out_of_range_error_nr(sc, sc->inexact_to_exact_symbol, x, it_is_too_large_string);
 #endif
-	  }
-	/* c_rationalize limit is RATIONALIZE_LIMIT=1e12 currently so this is a tighter limit than DOUBLE_TO_INT64_LIMIT */
-	if (c_rationalize(val, sc->default_rationalize_error, &numer, &denom))
-	  return(make_ratio(sc, numer, denom));
+          }
+        /* c_rationalize limit is RATIONALIZE_LIMIT=1e12 currently so this is a tighter limit than DOUBLE_TO_INT64_LIMIT */
+        if (c_rationalize(val, sc->default_rationalize_error, &numer, &denom))
+          return(make_ratio(sc, numer, denom));
       }
 
     default:
@@ -25196,12 +25196,12 @@ sign of 'x' (1 = positive, -1 = negative).  (integer-decode-float 0.0): (0 0 1)"
   if (is_t_real(x))
     {
       if (real(x) == 0.0)
-	return(list_3(sc, int_zero, int_zero, int_one));
+        return(list_3(sc, int_zero, int_zero, int_one));
       num.fx = (double)real(x);
       return(list_3(sc,
-		    make_integer_unchecked(sc, (s7_int)((num.ix & 0xfffffffffffffLL) | 0x10000000000000LL)),
-		    make_integer(sc, (s7_int)(((num.ix & 0x7fffffffffffffffLL) >> 52) - 1023 - 52)),
-		    ((num.ix & 0x8000000000000000LL) != 0) ? minus_one : int_one));
+                    make_integer_unchecked(sc, (s7_int)((num.ix & 0xfffffffffffffLL) | 0x10000000000000LL)),
+                    make_integer(sc, (s7_int)(((num.ix & 0x7fffffffffffffffLL) >> 52) - 1023 - 52)),
+                    ((num.ix & 0x8000000000000000LL) != 0) ? minus_one : int_one));
     }
 #if WITH_GMP
   if (is_t_big_real(x))
@@ -25228,21 +25228,21 @@ static s7_pointer big_logior(s7_scheme *sc, s7_int start, s7_pointer args)
     {
       s7_pointer i = car(x);
       switch (type(i))
-	{
-	case T_BIG_INTEGER:
-	  mpz_ior(sc->mpz_1, sc->mpz_1, big_integer(i));
-	  break;
-	case T_INTEGER:
-	  mpz_set_si(sc->mpz_2, integer(i));
-	  mpz_ior(sc->mpz_1, sc->mpz_1, sc->mpz_2);
-	  break;
-	default:
-	  if (!is_integer_via_method(sc, i))
-	    wrong_type_error_nr(sc, sc->logior_symbol, position_of(x, args), i, sc->type_names[T_INTEGER]);
-	  return(method_or_bust(sc, i, sc->logior_symbol,
-				set_ulist_1(sc, mpz_to_integer(sc, sc->mpz_1), x),
-				sc->type_names[T_INTEGER], position_of(x, args)));
-	}}
+        {
+        case T_BIG_INTEGER:
+          mpz_ior(sc->mpz_1, sc->mpz_1, big_integer(i));
+          break;
+        case T_INTEGER:
+          mpz_set_si(sc->mpz_2, integer(i));
+          mpz_ior(sc->mpz_1, sc->mpz_1, sc->mpz_2);
+          break;
+        default:
+          if (!is_integer_via_method(sc, i))
+            wrong_type_error_nr(sc, sc->logior_symbol, position_of(x, args), i, sc->type_names[T_INTEGER]);
+          return(method_or_bust(sc, i, sc->logior_symbol,
+                                set_ulist_1(sc, mpz_to_integer(sc, sc->mpz_1), x),
+                                sc->type_names[T_INTEGER], position_of(x, args)));
+        }}
   return(mpz_to_integer(sc, sc->mpz_1));
 }
 #endif
@@ -25257,12 +25257,12 @@ static s7_pointer g_logior(s7_scheme *sc, s7_pointer args)
     {
 #if WITH_GMP
       if (is_t_big_integer(car(x)))
-	return(big_logior(sc, result, x));
+        return(big_logior(sc, result, x));
 #endif
       if (!is_t_integer(car(x)))
-	return(method_or_bust(sc, car(x), sc->logior_symbol,
-			      (result == 0) ? x : set_ulist_1(sc, make_integer(sc, result), x),
-			      sc->type_names[T_INTEGER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sc->logior_symbol,
+                              (result == 0) ? x : set_ulist_1(sc, make_integer(sc, result), x),
+                              sc->type_names[T_INTEGER], position_of(x, args)));
       result |= integer(car(x));
     }
   return(make_integer(sc, result));
@@ -25281,21 +25281,21 @@ static s7_pointer big_logxor(s7_scheme *sc, s7_int start, s7_pointer args)
     {
       s7_pointer i = car(x);
       switch (type(i))
-	{
-	case T_BIG_INTEGER:
-	  mpz_xor(sc->mpz_1, sc->mpz_1, big_integer(i));
-	  break;
-	case T_INTEGER:
-	  mpz_set_si(sc->mpz_2, integer(i));
-	  mpz_xor(sc->mpz_1, sc->mpz_1, sc->mpz_2);
-	  break;
-	default:
-	  if (!is_integer_via_method(sc, i))
-	    wrong_type_error_nr(sc, sc->logxor_symbol, position_of(x, args), i, sc->type_names[T_INTEGER]);
-	  return(method_or_bust(sc, i, sc->logxor_symbol,
-				set_ulist_1(sc, mpz_to_integer(sc, sc->mpz_1), x),
-				sc->type_names[T_INTEGER], position_of(x, args)));
-	}}
+        {
+        case T_BIG_INTEGER:
+          mpz_xor(sc->mpz_1, sc->mpz_1, big_integer(i));
+          break;
+        case T_INTEGER:
+          mpz_set_si(sc->mpz_2, integer(i));
+          mpz_xor(sc->mpz_1, sc->mpz_1, sc->mpz_2);
+          break;
+        default:
+          if (!is_integer_via_method(sc, i))
+            wrong_type_error_nr(sc, sc->logxor_symbol, position_of(x, args), i, sc->type_names[T_INTEGER]);
+          return(method_or_bust(sc, i, sc->logxor_symbol,
+                                set_ulist_1(sc, mpz_to_integer(sc, sc->mpz_1), x),
+                                sc->type_names[T_INTEGER], position_of(x, args)));
+        }}
   return(mpz_to_integer(sc, sc->mpz_1));
 }
 #endif
@@ -25310,12 +25310,12 @@ static s7_pointer g_logxor(s7_scheme *sc, s7_pointer args)
     {
 #if WITH_GMP
       if (is_t_big_integer(car(x)))
-	return(big_logxor(sc, result, x));
+        return(big_logxor(sc, result, x));
 #endif
       if (!is_t_integer(car(x)))
-	return(method_or_bust(sc, car(x), sc->logxor_symbol,
-			      (result == 0) ? x : set_ulist_1(sc, make_integer(sc, result), x),
-			      sc->type_names[T_INTEGER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sc->logxor_symbol,
+                              (result == 0) ? x : set_ulist_1(sc, make_integer(sc, result), x),
+                              sc->type_names[T_INTEGER], position_of(x, args)));
       result ^= integer(car(x));
     }
   return(make_integer(sc, result));
@@ -25334,21 +25334,21 @@ static s7_pointer big_logand(s7_scheme *sc, s7_int start, s7_pointer args)
     {
       s7_pointer i = car(x);
       switch (type(i))
-	{
-	case T_BIG_INTEGER:
-	  mpz_and(sc->mpz_1, sc->mpz_1, big_integer(i));
-	  break;
-	case T_INTEGER:
-	  mpz_set_si(sc->mpz_2, integer(i));
-	  mpz_and(sc->mpz_1, sc->mpz_1, sc->mpz_2);
-	  break;
-	default:
-	  if (!is_integer_via_method(sc, i))
-	    wrong_type_error_nr(sc, sc->logand_symbol, position_of(x, args), i, sc->type_names[T_INTEGER]);
-	  return(method_or_bust(sc, i, sc->logand_symbol,
-				set_ulist_1(sc, mpz_to_integer(sc, sc->mpz_1), x),
-				sc->type_names[T_INTEGER], position_of(x, args)));
-	}}
+        {
+        case T_BIG_INTEGER:
+          mpz_and(sc->mpz_1, sc->mpz_1, big_integer(i));
+          break;
+        case T_INTEGER:
+          mpz_set_si(sc->mpz_2, integer(i));
+          mpz_and(sc->mpz_1, sc->mpz_1, sc->mpz_2);
+          break;
+        default:
+          if (!is_integer_via_method(sc, i))
+            wrong_type_error_nr(sc, sc->logand_symbol, position_of(x, args), i, sc->type_names[T_INTEGER]);
+          return(method_or_bust(sc, i, sc->logand_symbol,
+                                set_ulist_1(sc, mpz_to_integer(sc, sc->mpz_1), x),
+                                sc->type_names[T_INTEGER], position_of(x, args)));
+        }}
   return(mpz_to_integer(sc, sc->mpz_1));
 }
 #endif
@@ -25363,12 +25363,12 @@ static s7_pointer g_logand(s7_scheme *sc, s7_pointer args)
     {
 #if WITH_GMP
       if (is_t_big_integer(car(x)))
-	return(big_logand(sc, result, x));
+        return(big_logand(sc, result, x));
 #endif
       if (!is_t_integer(car(x)))
-	return(method_or_bust(sc, car(x), sc->logand_symbol,
-			      (result == -1) ? x : set_ulist_1(sc, make_integer(sc, result), x),
-			      sc->type_names[T_INTEGER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sc->logand_symbol,
+                              (result == -1) ? x : set_ulist_1(sc, make_integer(sc, result), x),
+                              sc->type_names[T_INTEGER], position_of(x, args)));
       result &= integer(car(x));
     }
   return(make_integer(sc, result));
@@ -25455,7 +25455,7 @@ static bool logbit_b_7pp(s7_scheme *sc, s7_pointer p1, s7_pointer p2)
   if (is_t_integer(p1))
     {
       if (is_t_integer(p2))
-	return(logbit_b_7ii(sc, integer(p1), integer(p2)));
+        return(logbit_b_7ii(sc, integer(p1), integer(p2)));
       return(method_or_bust(sc, p2, sc->logbit_symbol, set_plist_2(sc, p1, p2), sc->type_names[T_INTEGER], 2) != sc->F);
     }
 #if WITH_GMP
@@ -25473,7 +25473,7 @@ static s7_int c_ash(s7_scheme *sc, s7_int arg1, s7_int arg2)
   if (arg2 >= S7_INT_BITS)
     {
       if ((arg1 == -1) && (arg2 == 63))   /* (ash -1 63): most-negative-fixnum */
-	return(S7_INT64_MIN);
+        return(S7_INT64_MIN);
       out_of_range_error_nr(sc, sc->ash_symbol, int_two, wrap_integer(sc, arg2), it_is_too_large_string);
     }
   if (arg2 < -S7_INT_BITS)
@@ -25508,45 +25508,45 @@ static s7_pointer g_ash(s7_scheme *sc, s7_pointer args)
       int32_t p0_compared_to_zero = 0;
 
       if (p0_is_big)
-	p0_compared_to_zero = mpz_cmp_ui(big_integer(p0), 0);
+        p0_compared_to_zero = mpz_cmp_ui(big_integer(p0), 0);
       else
-	if (integer(p0) > 0)
-	  p0_compared_to_zero = 1;
-	else p0_compared_to_zero = (integer(p0) < 0) ? -1 : 0;
+        if (integer(p0) > 0)
+          p0_compared_to_zero = 1;
+        else p0_compared_to_zero = (integer(p0) < 0) ? -1 : 0;
 
       if (p0_compared_to_zero == 0)
-	return(int_zero);
+        return(int_zero);
 
       if (is_big_number(p1))
-	{
-	  if (!mpz_fits_sint_p(big_integer(p1)))
-	    {
-	      if (mpz_cmp_ui(big_integer(p1), 0) > 0)
-		out_of_range_error_nr(sc, sc->ash_symbol, int_two, p1, it_is_too_large_string);
-
-	      /* here if p0 is negative, we need to return -1 */
-	      return((p0_compared_to_zero == 1) ? int_zero : minus_one);
-	    }
-	  shift = mpz_get_si(big_integer(p1));
-	}
+        {
+          if (!mpz_fits_sint_p(big_integer(p1)))
+            {
+              if (mpz_cmp_ui(big_integer(p1), 0) > 0)
+                out_of_range_error_nr(sc, sc->ash_symbol, int_two, p1, it_is_too_large_string);
+
+              /* here if p0 is negative, we need to return -1 */
+              return((p0_compared_to_zero == 1) ? int_zero : minus_one);
+            }
+          shift = mpz_get_si(big_integer(p1));
+        }
       else
-	{
-	  shift = integer(p1);
-	  if (shift < S7_INT32_MIN)
-	    return((p0_compared_to_zero == 1) ? int_zero : minus_one);
-	}
+        {
+          shift = integer(p1);
+          if (shift < S7_INT32_MIN)
+            return((p0_compared_to_zero == 1) ? int_zero : minus_one);
+        }
       if (shift > S7_INT32_MAX)
-	out_of_range_error_nr(sc, sc->ash_symbol, int_two, p1, it_is_too_large_string); /* gmp calls abort if overflow here */
+        out_of_range_error_nr(sc, sc->ash_symbol, int_two, p1, it_is_too_large_string); /* gmp calls abort if overflow here */
 
       if (is_t_big_integer(p0))
-	mpz_set(sc->mpz_1, big_integer(p0));
+        mpz_set(sc->mpz_1, big_integer(p0));
       else mpz_set_si(sc->mpz_1, integer(p0));
 
       if (shift > 0)     /* left */
-	mpz_mul_2exp(sc->mpz_1, sc->mpz_1, shift);
+        mpz_mul_2exp(sc->mpz_1, sc->mpz_1, shift);
       else
-	if (shift < 0) /* right */
-	  mpz_fdiv_q_2exp(sc->mpz_1, sc->mpz_1, (uint32_t)(-shift));
+        if (shift < 0) /* right */
+          mpz_fdiv_q_2exp(sc->mpz_1, sc->mpz_1, (uint32_t)(-shift));
 
       return(mpz_to_integer(sc, sc->mpz_1));
     }
@@ -25772,7 +25772,7 @@ static s7_pointer g_random(s7_scheme *sc, s7_pointer args)
     {
       r = cadr(args);
       if (!is_random_state(r))
-	return(method_or_bust(sc, r, sc->random_symbol, args, a_random_state_object_string, 2));
+        return(method_or_bust(sc, r, sc->random_symbol, args, a_random_state_object_string, 2));
     }
   num = car(args);
   switch (type(num))
@@ -25782,43 +25782,43 @@ static s7_pointer g_random(s7_scheme *sc, s7_pointer args)
       return(make_integer(sc, (s7_int)(integer(num) * next_random(r))));
     case T_RATIO:
       {
-	s7_double x = fraction(num), error;
-	s7_int numer = 0, denom = 1;
-	/* the error here needs to take the size of the fraction into account.  Otherwise, if
-	 *    error is (say) 1e-6 and the fraction is (say) 9000000/9223372036854775807,
-	 *    c_rationalize will always return 0.  But even that isn't foolproof:
-	 *    (random 1/562949953421312) -> 1/376367230475000
-	 */
-	if ((x < 1.0e-10) && (x > -1.0e-10))
-	  {
-	    /* 1e-12 is not tight enough:
-	     *    (random 1/2251799813685248) -> 1/2250240579436280
-	     *    (random -1/4503599627370496) -> -1/4492889778435526
-	     *    (random 1/140737488355328) -> 1/140730223985746
-	     *    (random -1/35184372088832) -> -1/35183145492420
-	     *    (random -1/70368744177664) -> -1/70366866392738
-	     *    (random 1/4398046511104) -> 1/4398033095756
-	     *    (random 1/137438953472) -> 1/137438941127
-	     */
-	    if (numerator(num) < -10)
-	      numer = -(s7_int)(floor(-numerator(num) * next_random(r)));
-	    else
-	      if (numerator(num) > 10)
-		numer = (s7_int)floor(numerator(num) * next_random(r));
-	      else
-		{
-		  int64_t diff = S7_INT64_MAX - denominator(num);
-		  numer = numerator(num);
-		  if (diff < 100)
-		    return(make_ratio(sc, numer, denominator(num)));
-		  denom = denominator(num) + (s7_int)floor(diff * next_random(r));
-		  return(make_ratio_with_div_check(sc, sc->random_symbol, numer, denom));
-		}
-	    return(make_ratio(sc, numer, denominator(num)));
-	  }
-	error = ((x < 1e-6) && (x > -1e-6)) ? 1e-18 : 1e-12;
-	c_rationalize(x * next_random(r), error, &numer, &denom);
-	return(make_ratio(sc, numer, denom));
+        s7_double x = fraction(num), error;
+        s7_int numer = 0, denom = 1;
+        /* the error here needs to take the size of the fraction into account.  Otherwise, if
+         *    error is (say) 1e-6 and the fraction is (say) 9000000/9223372036854775807,
+         *    c_rationalize will always return 0.  But even that isn't foolproof:
+         *    (random 1/562949953421312) -> 1/376367230475000
+         */
+        if ((x < 1.0e-10) && (x > -1.0e-10))
+          {
+            /* 1e-12 is not tight enough:
+             *    (random 1/2251799813685248) -> 1/2250240579436280
+             *    (random -1/4503599627370496) -> -1/4492889778435526
+             *    (random 1/140737488355328) -> 1/140730223985746
+             *    (random -1/35184372088832) -> -1/35183145492420
+             *    (random -1/70368744177664) -> -1/70366866392738
+             *    (random 1/4398046511104) -> 1/4398033095756
+             *    (random 1/137438953472) -> 1/137438941127
+             */
+            if (numerator(num) < -10)
+              numer = -(s7_int)(floor(-numerator(num) * next_random(r)));
+            else
+              if (numerator(num) > 10)
+                numer = (s7_int)floor(numerator(num) * next_random(r));
+              else
+                {
+                  int64_t diff = S7_INT64_MAX - denominator(num);
+                  numer = numerator(num);
+                  if (diff < 100)
+                    return(make_ratio(sc, numer, denominator(num)));
+                  denom = denominator(num) + (s7_int)floor(diff * next_random(r));
+                  return(make_ratio_with_div_check(sc, sc->random_symbol, numer, denom));
+                }
+            return(make_ratio(sc, numer, denominator(num)));
+          }
+        error = ((x < 1e-6) && (x > -1e-6)) ? 1e-18 : 1e-12;
+        c_rationalize(x * next_random(r), error, &numer, &denom);
+        return(make_ratio(sc, numer, denom));
       }
     case T_REAL:
       return(make_real(sc, real(num) * next_random(r)));
@@ -25836,7 +25836,7 @@ static s7_pointer g_random(s7_scheme *sc, s7_pointer args)
       mpz_urandomm(sc->mpz_1, random_gmp_state(r), big_integer(num));
       /* this does not work if num is a negative number -- you get positive results. so check num for sign, and negate result if necessary */
       if (mpz_cmp_ui(big_integer(num), 0) < 0)
-	mpz_neg(sc->mpz_1, sc->mpz_1);
+        mpz_neg(sc->mpz_1, sc->mpz_1);
       return(mpz_to_integer(sc, sc->mpz_1));
     case T_RATIO:
       mpfr_urandomb(sc->mpfr_1, random_gmp_state(r));
@@ -25950,7 +25950,7 @@ static s7_pointer random_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_p
     {
       s7_pointer arg1 = cadr(expr);
       if (is_t_integer(arg1))
-	return(sc->random_i);
+        return(sc->random_i);
       return((is_t_real(arg1)) ? sc->random_f : sc->random_1);
     }
   return(f);
@@ -26014,7 +26014,7 @@ static s7_pointer integer_to_char_p_i(s7_scheme *sc, s7_int ind)
 {
   if ((ind < 0) || (ind >= NUM_CHARS))
     sole_arg_out_of_range_error_nr(sc, sc->integer_to_char_symbol, wrap_integer(sc, ind),
-				   wrap_string(sc, "it doen't fit in an unsigned byte", 33)); /* int2 s7_out... uses 1 */
+                                   wrap_string(sc, "it doen't fit in an unsigned byte", 33)); /* int2 s7_out... uses 1 */
   return(chars[(uint8_t)ind]);
 }
 
@@ -26060,21 +26060,21 @@ static void init_chars(void)
 
       #define make_character_name(S) memcpy((void *)(&(character_name(cp))), (const void *)(S), character_name_length(cp) = (int32_t)strlen(S))
       switch (c)
-	{
-	case ' ':	 make_character_name("#\\space");     break;
-	case '\n':       make_character_name("#\\newline");   break;
-	case '\r':       make_character_name("#\\return");    break;
-	case '\t':       make_character_name("#\\tab");       break;
-	case '\0':       make_character_name("#\\null");      break;
-	case (char)0x1b: make_character_name("#\\escape");    break;
-	case (char)0x7f: make_character_name("#\\delete");    break;
-	case (char)7:    make_character_name("#\\alarm");     break;
-	case (char)8:    make_character_name("#\\backspace"); break;
-	default:
+        {
+        case ' ':         make_character_name("#\\space");     break;
+        case '\n':       make_character_name("#\\newline");   break;
+        case '\r':       make_character_name("#\\return");    break;
+        case '\t':       make_character_name("#\\tab");       break;
+        case '\0':       make_character_name("#\\null");      break;
+        case (char)0x1b: make_character_name("#\\escape");    break;
+        case (char)0x7f: make_character_name("#\\delete");    break;
+        case (char)7:    make_character_name("#\\alarm");     break;
+        case (char)8:    make_character_name("#\\backspace"); break;
+        default:
           #define P_SIZE 12
-	  character_name_length(cp) = snprintf((char *)(&(character_name(cp))), P_SIZE, ((c < 32) || (c >= 127)) ? "#\\x%x" : "#\\%c", c);
-	  break;
-	}}
+          character_name_length(cp) = snprintf((char *)(&(character_name(cp))), P_SIZE, ((c < 32) || (c >= 127)) ? "#\\x%x" : "#\\%c", c);
+          break;
+        }}
 }
 
 
@@ -26259,7 +26259,7 @@ static bool is_character_via_method(s7_scheme *sc, s7_pointer p)
     {
       s7_pointer f = find_method_with_let(sc, p, sc->is_char_symbol);
       if (f != sc->undefined)
-	return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
+        return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
     }
   return(false);
 }
@@ -26280,9 +26280,9 @@ static s7_pointer g_char_cmp(s7_scheme *sc, s7_pointer args, int32_t val, s7_poi
   for (s7_pointer x = cdr(args); is_pair(x); y = car(x), x = cdr(x))
     {
       if (!is_character(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
       if (charcmp(character(y), character(car(x))) != val)
-	return(char_with_error_check(sc, x, args, sym));
+        return(char_with_error_check(sc, x, args, sym));
     }
   return(sc->T);
 }
@@ -26295,9 +26295,9 @@ static s7_pointer g_char_cmp_not(s7_scheme *sc, s7_pointer args, int32_t val, s7
   for (s7_pointer x = cdr(args); is_pair(x); y = car(x), x = cdr(x))
     {
       if (!is_character(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
       if (charcmp(character(y), character(car(x))) == val)
-	return(char_with_error_check(sc, x, args, sym));
+        return(char_with_error_check(sc, x, args, sym));
     }
   return(sc->T);
 }
@@ -26313,9 +26313,9 @@ static s7_pointer g_chars_are_equal(s7_scheme *sc, s7_pointer args)
   for (s7_pointer x = cdr(args); is_pair(x); x = cdr(x))
     {
       if (!is_character(car(x)))
-	return(method_or_bust(sc, car(x), sc->char_eq_symbol, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sc->char_eq_symbol, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
       if (car(x) != y)
-	return(char_with_error_check(sc, x, args, sc->char_eq_symbol));
+        return(char_with_error_check(sc, x, args, sc->char_eq_symbol));
     }
   return(sc->T);
 }
@@ -26434,7 +26434,7 @@ static s7_pointer char_equal_chooser(s7_scheme *sc, s7_pointer f, int32_t args,
     {
       s7_pointer arg1 = cadr(expr), arg2 = caddr(expr);
       if ((returns_char(sc, arg1)) && (returns_char(sc, arg2)))
-	return(sc->simple_char_eq);
+        return(sc->simple_char_eq);
     }
   return(sc->char_equal_2);
 }
@@ -26461,9 +26461,9 @@ static s7_pointer g_char_cmp_ci(s7_scheme *sc, s7_pointer args, int32_t val, s7_
   for (s7_pointer x = cdr(args); is_pair(x); y = car(x), x = cdr(x))
     {
       if (!is_character(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
       if (charcmp(upper_character(y), upper_character(car(x))) != val)
-	return(char_with_error_check(sc, x, args, sym));
+        return(char_with_error_check(sc, x, args, sym));
     }
   return(sc->T);
 }
@@ -26476,9 +26476,9 @@ static s7_pointer g_char_cmp_ci_not(s7_scheme *sc, s7_pointer args, int32_t val,
   for (s7_pointer x = cdr(args); is_pair(x); y = car(x), x = cdr(x))
     {
       if (!is_character(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_CHARACTER], position_of(x, args)));
       if (charcmp(upper_character(y), upper_character(car(x))) == val)
-	return(char_with_error_check(sc, x, args, sym));
+        return(char_with_error_check(sc, x, args, sym));
     }
   return(sc->T);
 }
@@ -26581,10 +26581,10 @@ static s7_pointer g_char_position(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer arg3 = caddr(args);
       if (!s7_is_integer(arg3))
-	return(method_or_bust(sc, arg3, sc->char_position_symbol, args, sc->type_names[T_INTEGER], 3));
+        return(method_or_bust(sc, arg3, sc->char_position_symbol, args, sc->type_names[T_INTEGER], 3));
       start = s7_integer_clamped_if_gmp(sc, arg3);
       if (start < 0)
-	wrong_type_error_nr(sc, sc->char_position_symbol, 3, arg3, a_non_negative_integer_string);
+        wrong_type_error_nr(sc, sc->char_position_symbol, 3, arg3, a_non_negative_integer_string);
     }
   else start = 0;
 
@@ -26651,10 +26651,10 @@ static s7_pointer g_char_position_csi(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer arg3 = caddr(args);
       if (!s7_is_integer(arg3))
-	return(g_char_position(sc, args));
+        return(g_char_position(sc, args));
       start = s7_integer_clamped_if_gmp(sc, arg3);
       if (start < 0)
-	wrong_type_error_nr(sc, sc->char_position_symbol, 3, arg3, a_non_negative_integer_string);
+        wrong_type_error_nr(sc, sc->char_position_symbol, 3, arg3, a_non_negative_integer_string);
       if (start >= len) return(sc->F);
     }
   else start = 0;
@@ -26692,10 +26692,10 @@ static s7_pointer g_string_position(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer arg3 = caddr(args);
       if (!s7_is_integer(arg3))
-	return(method_or_bust(sc, arg3, sc->string_position_symbol, args, sc->type_names[T_INTEGER], 3));
+        return(method_or_bust(sc, arg3, sc->string_position_symbol, args, sc->type_names[T_INTEGER], 3));
       start = s7_integer_clamped_if_gmp(sc, arg3);
       if (start < 0)
-	wrong_type_error_nr(sc, sc->string_position_symbol, 3, caddr(args), a_non_negative_integer_string);
+        wrong_type_error_nr(sc, sc->string_position_symbol, 3, caddr(args), a_non_negative_integer_string);
     }
 
   if (string_length(s1p) == 0)
@@ -26917,8 +26917,8 @@ static s7_pointer g_make_string(s7_scheme *sc, s7_pointer args)
     out_of_range_error_nr(sc, sc->make_string_symbol, int_one, n, it_is_negative_string);
   if (len > sc->max_string_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-string length argument ~D is greater than (*s7* 'max-string-length), ~D", 76),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
+             set_elist_3(sc, wrap_string(sc, "make-string length argument ~D is greater than (*s7* 'max-string-length), ~D", 76),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
 
   if (is_null(cdr(args)))
     return(make_empty_string(sc, len, '\0')); /* #\null here means "don't fill/clear" */
@@ -26936,8 +26936,8 @@ static s7_pointer make_string_p_i(s7_scheme *sc, s7_int len)
     out_of_range_error_nr(sc, sc->make_string_symbol, int_one, wrap_integer(sc, len), it_is_negative_string);
   if (len > sc->max_string_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-string length argument ~D is greater than (*s7* 'max-string-length), ~D", 76),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
+             set_elist_3(sc, wrap_string(sc, "make-string length argument ~D is greater than (*s7* 'max-string-length), ~D", 76),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
   return(make_empty_string(sc, len, '\0'));
 }
 
@@ -26985,7 +26985,7 @@ static s7_pointer g_string_downcase(s7_scheme *sc, s7_pointer args)
     {
       i = len - 1;
       while (i >= 8)
-	LOOP_8(nstr[i] = lowers[(uint8_t)ostr[i]]; i--);
+        LOOP_8(nstr[i] = lowers[(uint8_t)ostr[i]]; i--);
       while (i >= 0) {nstr[i] = lowers[(uint8_t)ostr[i]]; i--;}
     }
   else
@@ -27014,7 +27014,7 @@ static s7_pointer g_string_upcase(s7_scheme *sc, s7_pointer args)
     {
       i = len - 1;
       while (i >= 8)
-	LOOP_8(nstr[i] = uppers[(uint8_t)ostr[i]]; i--);
+        LOOP_8(nstr[i] = uppers[(uint8_t)ostr[i]]; i--);
       while (i >= 0) {nstr[i] = uppers[(uint8_t)ostr[i]]; i--;}
     }
   else
@@ -27180,8 +27180,8 @@ static s7_int sequence_length(s7_scheme *sc, s7_pointer lst)
     {
     case T_PAIR:
       {
-	s7_int len = s7_list_length(sc, lst);
-	return((len == 0) ? -1 : len);
+        s7_int len = s7_list_length(sc, lst);
+        return((len == 0) ? -1 : len);
       }
     case T_NIL:         return(0);
     case T_BYTE_VECTOR: case T_INT_VECTOR: case T_FLOAT_VECTOR:
@@ -27191,9 +27191,9 @@ static s7_int sequence_length(s7_scheme *sc, s7_pointer lst)
     case T_LET:         return(let_length(sc, lst));
     case T_C_OBJECT:
       {
-	s7_pointer x = c_object_length(sc, lst);
-	if (s7_is_integer(x))
-	  return(s7_integer_clamped_if_gmp(sc, x));
+        s7_pointer x = c_object_length(sc, lst);
+        if (s7_is_integer(x))
+          return(s7_integer_clamped_if_gmp(sc, x));
       }}
   return(-1);
 }
@@ -27208,22 +27208,22 @@ static void string_append_2(s7_scheme *sc, s7_pointer newstr, s7_pointer args, c
   for (pos = string_value(newstr), x = args; x != stop_arg; x = cdr(x))
     if (is_string(car(x)))
       {
-	len = string_length(car(x));
-	if (len > 0)
-	  {
-	    memcpy(pos, string_value(car(x)), len);
-	    pos += len;
-	  }}
+        len = string_length(car(x));
+        if (len > 0)
+          {
+            memcpy(pos, string_value(car(x)), len);
+            pos += len;
+          }}
     else
       if (!sequence_is_empty(sc, car(x)))
-	{
-	  char *old_str = string_value(newstr);
-	  string_value(newstr) = pos;
-	  len = sequence_length(sc, car(x));
-	  s7_copy_1(sc, caller, set_plist_2(sc, car(x), newstr));
-	  string_value(newstr) = old_str;
-	  pos += len;
-	}
+        {
+          char *old_str = string_value(newstr);
+          string_value(newstr) = pos;
+          len = sequence_length(sc, car(x));
+          s7_copy_1(sc, caller, set_plist_2(sc, car(x), newstr));
+          string_value(newstr) = old_str;
+          pos += len;
+        }
 }
 
 static s7_pointer g_string_append_1(s7_scheme *sc, s7_pointer args, s7_pointer caller)
@@ -27244,44 +27244,44 @@ static s7_pointer g_string_append_1(s7_scheme *sc, s7_pointer args, s7_pointer c
     {
       s7_pointer p = car(x);
       if (is_string(p))
-	len += string_length(p);
+        len += string_length(p);
       else
-	{
-	  s7_int newlen;
-	  if (!is_sequence(p))
-	    {
-	      unstack_gc_protect(sc);
-	      wrong_type_error_nr(sc, caller, position_of(x, args), p, sc->type_names[T_STRING]);
-	    }
-	  if (has_active_methods(sc, p)) /* look for string-append and if found, cobble up a plausible intermediate call */
-	    {
-	      s7_pointer func = find_method_with_let(sc, p, caller);
-	      if (func != sc->undefined)
-		{
-		  if (len == 0)
-		    {
-		      unstack_gc_protect(sc);
-		      return(s7_apply_function(sc, func, x)); /* not args (string-append "" "" ...) */
-		    }
-		  newstr = make_empty_string(sc, len, 0);
-		  string_append_2(sc, newstr, args, x, caller);
-		  unstack_gc_protect(sc);
-		  return(s7_apply_function(sc, func, set_ulist_1(sc, newstr, x)));
-		}}
-	  if ((caller == sc->string_append_symbol) || (caller == sc->symbol_symbol))
-	    {
-	      unstack_gc_protect(sc);
-	      wrong_type_error_nr(sc, caller, position_of(x, args), p, sc->type_names[T_STRING]);
-	    }
-	  newlen = sequence_length(sc, p);
-	  if (newlen < 0)
-	    {
-	      unstack_gc_protect(sc);
-	      wrong_type_error_nr(sc, caller, position_of(x, args), p, sc->type_names[T_STRING]);
-	    }
-	  just_strings = false;
-	  len += newlen;
-	}}
+        {
+          s7_int newlen;
+          if (!is_sequence(p))
+            {
+              unstack_gc_protect(sc);
+              wrong_type_error_nr(sc, caller, position_of(x, args), p, sc->type_names[T_STRING]);
+            }
+          if (has_active_methods(sc, p)) /* look for string-append and if found, cobble up a plausible intermediate call */
+            {
+              s7_pointer func = find_method_with_let(sc, p, caller);
+              if (func != sc->undefined)
+                {
+                  if (len == 0)
+                    {
+                      unstack_gc_protect(sc);
+                      return(s7_apply_function(sc, func, x)); /* not args (string-append "" "" ...) */
+                    }
+                  newstr = make_empty_string(sc, len, 0);
+                  string_append_2(sc, newstr, args, x, caller);
+                  unstack_gc_protect(sc);
+                  return(s7_apply_function(sc, func, set_ulist_1(sc, newstr, x)));
+                }}
+          if ((caller == sc->string_append_symbol) || (caller == sc->symbol_symbol))
+            {
+              unstack_gc_protect(sc);
+              wrong_type_error_nr(sc, caller, position_of(x, args), p, sc->type_names[T_STRING]);
+            }
+          newlen = sequence_length(sc, p);
+          if (newlen < 0)
+            {
+              unstack_gc_protect(sc);
+              wrong_type_error_nr(sc, caller, position_of(x, args), p, sc->type_names[T_STRING]);
+            }
+          just_strings = false;
+          len += newlen;
+        }}
   if (len == 0)
     {
       unstack_gc_protect(sc);
@@ -27291,21 +27291,21 @@ static s7_pointer g_string_append_1(s7_scheme *sc, s7_pointer args, s7_pointer c
     {
       unstack_gc_protect(sc);
       error_nr(sc, sc->out_of_range_symbol,
-	       set_elist_4(sc, wrap_string(sc, "~S new string length, ~D, is larger than (*s7* 'max-string-length): ~D", 70),
-			   caller, wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
+               set_elist_4(sc, wrap_string(sc, "~S new string length, ~D, is larger than (*s7* 'max-string-length): ~D", 70),
+                           caller, wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
     }
   newstr = inline_make_empty_string(sc, len, 0);
   if (just_strings)
     {
       x = args;
       for (char *pos = string_value(newstr); is_not_null(x); x = cdr(x))
-	{
-	  len = string_length(car(x));
-	  if (len > 0)
-	    {
-	      memcpy(pos, string_value(car(x)), len);
-	      pos += len;
-	    }}}
+        {
+          len = string_length(car(x));
+          if (len > 0)
+            {
+              memcpy(pos, string_value(car(x)), len);
+              pos += len;
+            }}}
   else string_append_2(sc, newstr, args, sc->nil, caller);
   unstack_gc_protect(sc);
   return(newstr);
@@ -27323,9 +27323,9 @@ static inline s7_pointer string_append_1(s7_scheme *sc, s7_pointer s1, s7_pointe
       len = pos + string_length(s2);
       if (len == pos) return(make_string_with_length(sc, string_value(s1), string_length(s1)));
       if (len > sc->max_string_length)
-	error_nr(sc, sc->out_of_range_symbol,
-		 set_elist_4(sc, wrap_string(sc, "~S new string length, ~D, is larger than (*s7* 'max-string-length): ~D", 70),
-			     sc->string_append_symbol, wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
+        error_nr(sc, sc->out_of_range_symbol,
+                 set_elist_4(sc, wrap_string(sc, "~S new string length, ~D, is larger than (*s7* 'max-string-length): ~D", 70),
+                             sc->string_append_symbol, wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
       newstr = make_empty_string(sc, len, 0); /* len+1 0-terminated */
       memcpy(string_value(newstr), string_value(s1), pos);
       memcpy((char *)(string_value(newstr) + pos), string_value(s2), string_length(s2));
@@ -27366,11 +27366,11 @@ static s7_pointer start_and_end(s7_scheme *sc, s7_pointer caller, s7_pointer arg
     {
       s7_pointer pend = cadr(index_args);
       if (!s7_is_integer(pend))
-	return(method_or_bust(sc, pend, caller, args, sc->type_names[T_INTEGER], position + 1));
+        return(method_or_bust(sc, pend, caller, args, sc->type_names[T_INTEGER], position + 1));
       index = s7_integer_clamped_if_gmp(sc, pend);
       if ((index < *start) ||
-	  (index > *end))
-	out_of_range_error_nr(sc, caller, small_int(position + 1), pend, (index < *start) ? it_is_too_small_string : it_is_too_large_string);
+          (index > *end))
+        out_of_range_error_nr(sc, caller, small_int(position + 1), pend, (index < *start) ? it_is_too_small_string : it_is_too_large_string);
       *end = index;
     }
   return(sc->unused);
@@ -27438,23 +27438,23 @@ static void check_for_substring_temp(s7_scheme *sc, s7_pointer expr)
     {
       s7_pointer arg = car(p);
       if ((is_pair(arg)) &&
-	  (is_symbol(car(arg))) &&
-	  (is_safely_optimized(arg)) &&
-	  (has_fn(arg)))
-	{
-	  if (fn_proc(arg) == g_substring)
-	    {
-	      if (substrs < NUM_STRING_WRAPPERS)
-		set_c_function(arg, sc->substring_uncopied);
-	      substrs++;
-	    }
-	  else
-	    if (fn_proc(arg) == g_symbol_to_string)
-	      set_c_function(arg, sc->symbol_to_string_uncopied);
-	    else
-	      if ((fn_proc(arg) == g_get_output_string) && (is_null(cddr(arg))))
-		set_c_function(arg, sc->get_output_string_uncopied);
-	}}
+          (is_symbol(car(arg))) &&
+          (is_safely_optimized(arg)) &&
+          (has_fn(arg)))
+        {
+          if (fn_proc(arg) == g_substring)
+            {
+              if (substrs < NUM_STRING_WRAPPERS)
+                set_c_function(arg, sc->substring_uncopied);
+              substrs++;
+            }
+          else
+            if (fn_proc(arg) == g_symbol_to_string)
+              set_c_function(arg, sc->symbol_to_string_uncopied);
+            else
+              if ((fn_proc(arg) == g_get_output_string) && (is_null(cddr(arg))))
+                set_c_function(arg, sc->get_output_string_uncopied);
+        }}
 }
 
 static s7_pointer string_substring_chooser(s7_scheme *sc, s7_pointer f, int32_t unused_args, s7_pointer expr)
@@ -27493,19 +27493,19 @@ static s7_pointer g_string_copy(s7_scheme *sc, s7_pointer args)
   else
     {
       if (!s7_is_integer(car(p)))
-	wrong_type_error_nr(sc, sc->string_copy_symbol, 3, car(p), sc->type_names[T_INTEGER]);
+        wrong_type_error_nr(sc, sc->string_copy_symbol, 3, car(p), sc->type_names[T_INTEGER]);
       start = s7_integer_clamped_if_gmp(sc, car(p));
       if (start < 0) start = 0;
       p = cdr(p);
       if (is_null(p))
-	end = start + string_length(source);
+        end = start + string_length(source);
       else
-	{
-	  if (!s7_is_integer(car(p)))
-	    wrong_type_error_nr(sc, sc->string_copy_symbol, 4, car(p), sc->type_names[T_INTEGER]);
-	  end = s7_integer_clamped_if_gmp(sc, car(p));
-	  if (end < 0) end = start;
-	}}
+        {
+          if (!s7_is_integer(car(p)))
+            wrong_type_error_nr(sc, sc->string_copy_symbol, 4, car(p), sc->type_names[T_INTEGER]);
+          end = s7_integer_clamped_if_gmp(sc, car(p));
+          if (end < 0) end = start;
+        }}
   if (end > string_length(dest)) end = string_length(dest);
   if (end <= start) return(dest);
   if ((end - start) > string_length(source)) end = start + string_length(source);
@@ -27536,25 +27536,25 @@ static int32_t scheme_strcmp(s7_pointer s1, s7_pointer s2)
   if (len < sizeof(size_t))
     for (size_t i = 0; i < len; i++)
       {
-	if ((uint8_t)(str1[i]) < (uint8_t )(str2[i]))
-	  return(-1);
-	if ((uint8_t)(str1[i]) > (uint8_t)(str2[i]))
-	  return(1);
+        if ((uint8_t)(str1[i]) < (uint8_t )(str2[i]))
+          return(-1);
+        if ((uint8_t)(str1[i]) > (uint8_t)(str2[i]))
+          return(1);
       }
   else
     {
       /* this algorithm from stackoverflow(?), with various changes (original did not work for large strings, etc) */
       size_t i = 0, last = len / sizeof(size_t);
       for (const size_t *ptr1 = (size_t *)str1, *ptr2 = (size_t *)str2; i < last; i++)
-	if (ptr1[i] != ptr2[i])
-	  break;
+        if (ptr1[i] != ptr2[i])
+          break;
       for (size_t pos = i * sizeof(size_t); pos < len; pos++)
-	{
-	  if ((uint8_t)str1[pos] < (uint8_t)str2[pos])
-	    return(-1);
-	  if ((uint8_t)str1[pos] > (uint8_t)str2[pos])
-	    return(1);
-	}}
+        {
+          if ((uint8_t)str1[pos] < (uint8_t)str2[pos])
+            return(-1);
+          if ((uint8_t)str1[pos] > (uint8_t)str2[pos])
+            return(1);
+        }}
   if (len1 < len2)
     return(-1);
   return((len1 > len2) ? 1 : 0);
@@ -27568,7 +27568,7 @@ static bool is_string_via_method(s7_scheme *sc, s7_pointer p)
     {
       s7_pointer f = find_method_with_let(sc, p, sc->is_string_symbol);
       if (f != sc->undefined)
-	return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
+        return(is_true(sc, s7_apply_function(sc, f, set_plist_1(sc, p))));
     }
   return(false);
 }
@@ -27581,14 +27581,14 @@ static s7_pointer g_string_cmp(s7_scheme *sc, s7_pointer args, int32_t val, s7_p
   for (s7_pointer x = cdr(args); is_not_null(x); y = car(x), x = cdr(x))
     {
       if (!is_string(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
       if (scheme_strcmp(y, car(x)) != val)
-	{
-	  for (y = cdr(x); is_pair(y); y = cdr(y))
-	    if (!is_string_via_method(sc, car(y)))
-	      wrong_type_error_nr(sc, sym, position_of(y, args), car(y), sc->type_names[T_STRING]);
-	  return(sc->F);
-	}}
+        {
+          for (y = cdr(x); is_pair(y); y = cdr(y))
+            if (!is_string_via_method(sc, car(y)))
+              wrong_type_error_nr(sc, sym, position_of(y, args), car(y), sc->type_names[T_STRING]);
+          return(sc->F);
+        }}
   return(sc->T);
 }
 
@@ -27600,21 +27600,21 @@ static s7_pointer g_string_cmp_not(s7_scheme *sc, s7_pointer args, int32_t val,
   for (s7_pointer x = cdr(args); is_not_null(x); y = car(x), x = cdr(x))
     {
       if (!is_string(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
       if (scheme_strcmp(y, car(x)) == val)
-	{
-	  for (y = cdr(x); is_pair(y); y = cdr(y))
-	    if (!is_string_via_method(sc, car(y)))
-	      wrong_type_error_nr(sc, sym, position_of(y, args), car(y), sc->type_names[T_STRING]);
-	  return(sc->F);
-	}}
+        {
+          for (y = cdr(x); is_pair(y); y = cdr(y))
+            if (!is_string_via_method(sc, car(y)))
+              wrong_type_error_nr(sc, sym, position_of(y, args), car(y), sc->type_names[T_STRING]);
+          return(sc->F);
+        }}
   return(sc->T);
 }
 
 static bool scheme_strings_are_equal(s7_pointer x, s7_pointer y)
 {
   return((string_length(x) == string_length(y)) &&
-	 (strings_are_equal_with_length(string_value(x), string_value(y), string_length(x))));
+         (strings_are_equal_with_length(string_value(x), string_value(y), string_length(x))));
 }
 
 static s7_pointer g_strings_are_equal(s7_scheme *sc, s7_pointer args)
@@ -27634,12 +27634,12 @@ static s7_pointer g_strings_are_equal(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer p = car(x);
       if (y != p)
-	{
-	  if (!is_string(p))
-	    return(method_or_bust(sc, p, sc->string_eq_symbol, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
-	  if (happy)
-	    happy = scheme_strings_are_equal(p, y);
-	}}
+        {
+          if (!is_string(p))
+            return(method_or_bust(sc, p, sc->string_eq_symbol, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
+          if (happy)
+            happy = scheme_strings_are_equal(p, y);
+        }}
   return((happy) ? sc->T : sc->F);
 }
 
@@ -27806,9 +27806,9 @@ static int32_t scheme_strcasecmp(s7_pointer s1, s7_pointer s2)
   for (s7_int i = 0; i < len; i++)
     {
       if (uppers[(int32_t)str1[i]] < uppers[(int32_t)str2[i]])
-	return(-1);
+        return(-1);
       if (uppers[(int32_t)str1[i]] > uppers[(int32_t)str2[i]])
-	return(1);
+        return(1);
     }
   if (len1 < len2)
     return(-1);
@@ -27849,15 +27849,15 @@ static s7_pointer g_string_ci_cmp(s7_scheme *sc, s7_pointer args, int32_t val, s
   for (s7_pointer x = cdr(args); is_not_null(x); y = car(x), x = cdr(x))
     {
       if (!is_string(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
       if (val == 0)
-	{
-	  if (!scheme_strequal_ci(y, car(x)))
-	    return(check_rest_are_strings(sc, sym, cdr(x), args));
-	}
+        {
+          if (!scheme_strequal_ci(y, car(x)))
+            return(check_rest_are_strings(sc, sym, cdr(x), args));
+        }
       else
-	if (scheme_strcasecmp(y, car(x)) != val)
-	  return(check_rest_are_strings(sc, sym, cdr(x), args));
+        if (scheme_strcasecmp(y, car(x)) != val)
+          return(check_rest_are_strings(sc, sym, cdr(x), args));
     }
   return(sc->T);
 }
@@ -27871,9 +27871,9 @@ static s7_pointer g_string_ci_cmp_not(s7_scheme *sc, s7_pointer args, int32_t va
   for (s7_pointer x = cdr(args); is_not_null(x); y = car(x), x = cdr(x))
     {
       if (!is_string(car(x)))
-	return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
+        return(method_or_bust(sc, car(x), sym, set_ulist_1(sc, y, x), sc->type_names[T_STRING], position_of(x, args)));
       if (scheme_strcasecmp(y, car(x)) == val)
-	return(check_rest_are_strings(sc, sym, cdr(x), args));
+        return(check_rest_are_strings(sc, sym, cdr(x), args));
     }
   return(sc->T);
 }
@@ -27968,7 +27968,7 @@ static s7_pointer g_string_fill_1(s7_scheme *sc, s7_pointer caller, s7_pointer a
     {
       s7_pointer p = start_and_end(sc, caller, args, 3, cddr(args), &start, &end);
       if (p != sc->unused)
-	return(p);
+        return(p);
       if (start == end) return(chr);
     }
   if (end == 0) return(chr);
@@ -28004,27 +28004,27 @@ static s7_pointer g_string_1(s7_scheme *sc, s7_pointer args, s7_pointer sym)
     {
       s7_pointer p = car(x);
       if (!is_character(p))
-	{
-	  if (has_active_methods(sc, p))
-	    {
-	      s7_pointer func = find_method_with_let(sc, p, sym);
-	      if (func != sc->undefined)
-		{
-		  s7_pointer y;
-		  if (len == 0)
-		    return(s7_apply_function(sc, func, args));
-		  newstr = make_empty_string(sc, len, 0);
-		  str = string_value(newstr);
-		  for (i = 0, y = args; y != x; i++, y = cdr(y))
-		    str[i] = character(car(y));
-		  return(g_string_append_1(sc, set_plist_2(sc, newstr, s7_apply_function(sc, func, x)), sym));
-		}}
-	  wrong_type_error_nr(sc, sym, len + 1, car(x), sc->type_names[T_CHARACTER]);
-	}}
+        {
+          if (has_active_methods(sc, p))
+            {
+              s7_pointer func = find_method_with_let(sc, p, sym);
+              if (func != sc->undefined)
+                {
+                  s7_pointer y;
+                  if (len == 0)
+                    return(s7_apply_function(sc, func, args));
+                  newstr = make_empty_string(sc, len, 0);
+                  str = string_value(newstr);
+                  for (i = 0, y = args; y != x; i++, y = cdr(y))
+                    str[i] = character(car(y));
+                  return(g_string_append_1(sc, set_plist_2(sc, newstr, s7_apply_function(sc, func, x)), sym));
+                }}
+          wrong_type_error_nr(sc, sym, len + 1, car(x), sc->type_names[T_CHARACTER]);
+        }}
   if (len > sc->max_string_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~S result string is too large (> ~D ~D) (*s7* 'max-string-length)", 65),
-			 sym, wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
+             set_elist_4(sc, wrap_string(sc, "~S result string is too large (> ~D ~D) (*s7* 'max-string-length)", 65),
+                         sym, wrap_integer(sc, len), wrap_integer(sc, sc->max_string_length)));
   newstr = inline_make_empty_string(sc, len, 0);
   str = string_value(newstr);
   for (i = 0, x = args; is_not_null(x); i++, x = cdr(x))
@@ -28076,7 +28076,7 @@ static s7_pointer g_list_to_string(s7_scheme *sc, s7_pointer args)
     return(nil_string);
   if (!s7_is_proper_list(sc, car(args)))
     return(method_or_bust_p(sc, car(args), sc->list_to_string_symbol,
-				     wrap_string(sc, "a (proper, non-circular) list of characters", 43)));
+                                     wrap_string(sc, "a (proper, non-circular) list of characters", 43)));
   return(g_string_1(sc, car(args), sc->list_to_string_symbol));
 }
 #endif
@@ -28119,9 +28119,9 @@ static s7_pointer g_string_to_list(s7_scheme *sc, s7_pointer args)
     if (end == 0) return(sc->nil);
   if ((end - start) > sc->max_list_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_5(sc, wrap_string(sc, "string->list length ~D, (- ~D ~D), is greater than (*s7* 'max-list-length), ~D", 78),
-			 wrap_integer(sc, end - start), wrap_integer(sc, end), wrap_integer(sc, start),
-			 wrap_integer(sc, sc->max_list_length)));
+             set_elist_5(sc, wrap_string(sc, "string->list length ~D, (- ~D ~D), is greater than (*s7* 'max-list-length), ~D", 78),
+                         wrap_integer(sc, end - start), wrap_integer(sc, end), wrap_integer(sc, start),
+                         wrap_integer(sc, sc->max_list_length)));
   sc->w = sc->nil;
   check_free_heap_size(sc, end - start);
   for (s7_int i = end - 1; i >= start; i--)
@@ -28265,8 +28265,8 @@ static s7_pointer g_set_port_position(s7_scheme *sc, s7_pointer args)
   else
     if (is_file_port(port))
       {
-	rewind(port_file(port));
-	fseek(port_file(port), (long)position, SEEK_SET);
+        rewind(port_file(port));
+        fseek(port_file(port), (long)position, SEEK_SET);
       }
 #endif
   return(pos);
@@ -28326,7 +28326,7 @@ static s7_pointer g_set_port_line_number(s7_scheme *sc, s7_pointer args)
     {
       p = car(args);
       if (!(is_input_port(p)))
-	wrong_type_error_nr(sc, wrap_string(sc, "set! port-line-number", 21), 1, p, an_input_port_string);
+        wrong_type_error_nr(sc, wrap_string(sc, "set! port-line-number", 21), 1, p, an_input_port_string);
     }
   line = (is_null(cdr(args)) ? car(args) : cadr(args));
   if (!is_t_integer(line))
@@ -28352,13 +28352,13 @@ static s7_pointer port_filename_p_p(s7_scheme *sc, s7_pointer x)
       (!port_is_closed(x)))
     {
       if (port_filename(x))
-	{
-	  if (port_filename_length(x) > sc->max_string_length)
-	    error_nr(sc, sc->out_of_range_symbol,
-		     set_elist_3(sc, wrap_string(sc, "port-filename is too long (> ~D ~D) (*s7* 'max-string-length)", 61),
-				 wrap_integer(sc, port_filename_length(x)), wrap_integer(sc, sc->max_string_length)));
-	  return(make_string_with_length(sc, port_filename(x), port_filename_length(x))); /* not wrapper here! */
-	}
+        {
+          if (port_filename_length(x) > sc->max_string_length)
+            error_nr(sc, sc->out_of_range_symbol,
+                     set_elist_3(sc, wrap_string(sc, "port-filename is too long (> ~D ~D) (*s7* 'max-string-length)", 61),
+                                 wrap_integer(sc, port_filename_length(x)), wrap_integer(sc, sc->max_string_length)));
+          return(make_string_with_length(sc, port_filename(x), port_filename_length(x))); /* not wrapper here! */
+        }
       return(nil_string);
       /* otherwise (eval-string (port-filename)) and (string->symbol (port-filename)) segfault */
     }
@@ -28649,10 +28649,10 @@ static s7_pointer g_close_input_port(s7_scheme *sc, s7_pointer args)
 static noreturn void file_error_nr(s7_scheme *sc, const char *caller, const char *descr, const char *name)
 {
   error_nr(sc, sc->io_error_symbol,
-	   set_elist_4(sc, wrap_string(sc, "~A: ~A ~S", 9),
-		       s7_make_string_wrapper(sc, caller),
-		       s7_make_string_wrapper(sc, descr),
-		       s7_make_string_wrapper(sc, name)));
+           set_elist_4(sc, wrap_string(sc, "~A: ~A ~S", 9),
+                       s7_make_string_wrapper(sc, caller),
+                       s7_make_string_wrapper(sc, descr),
+                       s7_make_string_wrapper(sc, name)));
 }
 
 bool s7_flush_output_port(s7_scheme *sc, s7_pointer p)
@@ -28664,12 +28664,12 @@ bool s7_flush_output_port(s7_scheme *sc, s7_pointer p)
       (port_file(p)))
     {
       if (port_position(p) > 0)
-	{
-	  result = (fwrite((void *)(port_data(p)), 1, port_position(p), port_file(p)) == (size_t)port_position(p));
-	  port_position(p) = 0;
-	}
+        {
+          result = (fwrite((void *)(port_data(p)), 1, port_position(p), port_file(p)) == (size_t)port_position(p));
+          port_position(p) = 0;
+        }
       if (fflush(port_file(p)) == -1)
-	file_error_nr(sc, "flush-output-port", strerror(errno), port_filename(p));
+        file_error_nr(sc, "flush-output-port", strerror(errno), port_filename(p));
     }
   return(result);
 }
@@ -28705,14 +28705,14 @@ static void close_output_file(s7_scheme *sc, s7_pointer p)
     {
 #if (WITH_WARNINGS)
       if ((port_position(p) > 0) &&
-	  (fwrite((void *)(port_data(p)), 1, port_position(p), port_file(p)) != (size_t)port_position(p)))
-	s7_warn(sc, 64, "fwrite trouble in close-output-port\n");
+          (fwrite((void *)(port_data(p)), 1, port_position(p), port_file(p)) != (size_t)port_position(p)))
+        s7_warn(sc, 64, "fwrite trouble in close-output-port\n");
 #else
       if (port_position(p) > 0)
-	fwrite((void *)(port_data(p)), 1, port_position(p), port_file(p));
+        fwrite((void *)(port_data(p)), 1, port_position(p), port_file(p));
 #endif
       if (fflush(port_file(p)) == -1)
-	s7_warn(sc, 64, "fflush in close-output-port: %s\n", strerror(errno));
+        s7_warn(sc, 64, "fflush in close-output-port: %s\n", strerror(errno));
       fclose(port_file(p));
       port_file(p) = NULL;
     }
@@ -28769,10 +28769,10 @@ static int32_t function_read_char(s7_scheme *sc, s7_pointer port)
   if (!is_character(res))          /* port_input_function might return some non-character */
     {
       if (is_multiple_value(res))
-	{
-	  clear_multiple_value(res);
-	  error_nr(sc, sc->bad_result_symbol, set_elist_2(sc, wrap_string(sc, "input-function-port read-char returned: ~S", 42), res));
-	}
+        {
+          clear_multiple_value(res);
+          error_nr(sc, sc->bad_result_symbol, set_elist_2(sc, wrap_string(sc, "input-function-port read-char returned: ~S", 42), res));
+        }
       error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "input-function-port read-char returned: ~S", 42), res));
     }
   return((int32_t)character(res));    /* kinda nutty -- we return chars[this] in g_read_char! */
@@ -28856,15 +28856,15 @@ static s7_pointer file_read_line(s7_scheme *sc, s7_pointer port, bool with_eol)
       char *buf;
       const char *snew = strchr(sc->read_line_buf, (int)'\n'); /* or maybe just strlen + end-of-string=newline */
       if (snew)
-	{
-	  s7_int pos = (s7_int)(snew - sc->read_line_buf);
-	  port_line_number(port)++;
-	  return(inline_make_string_with_length(sc, sc->read_line_buf, (with_eol) ? (pos + 1) : pos));
-	}
+        {
+          s7_int pos = (s7_int)(snew - sc->read_line_buf);
+          port_line_number(port)++;
+          return(inline_make_string_with_length(sc, sc->read_line_buf, (with_eol) ? (pos + 1) : pos));
+        }
       reads++;
       cur_size = strlen(sc->read_line_buf);
       if ((cur_size + reads) < read_size) /* end of data, no newline */
-	return(make_string_with_length(sc, sc->read_line_buf, cur_size));
+        return(make_string_with_length(sc, sc->read_line_buf, cur_size));
 
       /* need more data */
       sc->read_line_buf_size *= 2;
@@ -28909,7 +28909,7 @@ static void resize_port_data(s7_scheme *sc, s7_pointer pt, s7_int new_size)
   if (new_size < loc) return;
   if (new_size > sc->max_port_data_size)
     error_nr(sc, make_symbol(sc, "port-too-big", 12),
-	     set_elist_1(sc, wrap_string(sc, "port data size has grown past (*s7* 'max-port-data-size)", 56)));
+             set_elist_1(sc, wrap_string(sc, "port data size has grown past (*s7* 'max-port-data-size)", 56)));
 
   nb = reallocate(sc, port_data_block(pt), new_size);
   port_data_block(pt) = nb;
@@ -29037,15 +29037,15 @@ static void file_write_string(s7_scheme *sc, const char *str, s7_int len, s7_poi
   if (new_len >= sc->output_file_port_data_size)
     {
       if (port_position(pt) > 0)
-	{
+        {
 #if (WITH_WARNINGS)
-	  if (fwrite((void *)(port_data(pt)), 1, port_position(pt), port_file(pt)) != (size_t)port_position(pt))
-	    s7_warn(sc, 64, "fwrite trouble in write-string\n");
+          if (fwrite((void *)(port_data(pt)), 1, port_position(pt), port_file(pt)) != (size_t)port_position(pt))
+            s7_warn(sc, 64, "fwrite trouble in write-string\n");
 #else
-	  fwrite((void *)(port_data(pt)), 1, port_position(pt), port_file(pt));
+          fwrite((void *)(port_data(pt)), 1, port_position(pt), port_file(pt));
 #endif
-	  port_position(pt) = 0;
-	}
+          port_position(pt) = 0;
+        }
       fwrite((const void *)str, 1, len, port_file(pt));
     }
   else
@@ -29065,18 +29065,18 @@ static void file_display(s7_scheme *sc, const char *s, s7_pointer port)
   if (s)
     {
       if (port_position(port) > 0)
-	{
+        {
 #if (WITH_WARNINGS)
-	  if (fwrite((void *)(port_data(port)), 1, port_position(port), port_file(port)) != (size_t)port_position(port))
-	    s7_warn(sc, 64, "fwrite trouble in display\n");
+          if (fwrite((void *)(port_data(port)), 1, port_position(port), port_file(port)) != (size_t)port_position(port))
+            s7_warn(sc, 64, "fwrite trouble in display\n");
 #else
-	  fwrite((void *)(port_data(port)), 1, port_position(port), port_file(port));
+          fwrite((void *)(port_data(port)), 1, port_position(port), port_file(port));
 #endif
-	  port_position(port) = 0;
-	}
+          port_position(port) = 0;
+        }
 #if (WITH_WARNINGS)
       if (fputs(s, port_file(port)) == EOF)
-	s7_warn(sc, 64, "write to %s: %s\n", port_filename(port), strerror(errno));
+        s7_warn(sc, 64, "write to %s: %s\n", port_filename(port), strerror(errno));
 #else
       fputs(s, port_file(port));
 #endif
@@ -29137,21 +29137,21 @@ static s7_pointer g_write_string(s7_scheme *sc, s7_pointer args)
       s7_pointer inds = cddr(args);
       port = cadr(args);
       if (!is_null(inds))
-	{
-	  s7_pointer p = start_and_end(sc, sc->write_string_symbol, args, 3, inds, &start, &end);
-	  if (p != sc->unused) return(p);
-	}}
+        {
+          s7_pointer p = start_and_end(sc, sc->write_string_symbol, args, 3, inds, &start, &end);
+          if (p != sc->unused) return(p);
+        }}
   else port = current_output_port(sc);
   if (!is_output_port(port))
     {
       if (port == sc->F)
-	{
-	  s7_int len;
-	  if ((start == 0) && (end == string_length(str)))
-	    return(str);
-	  len = (s7_int)(end - start);
-	  return(make_string_with_length(sc, (char *)(string_value(str) + start), len));
-	}
+        {
+          s7_int len;
+          if ((start == 0) && (end == string_length(str)))
+            return(str);
+          len = (s7_int)(end - start);
+          return(make_string_with_length(sc, (char *)(string_value(str) + start), len));
+        }
       check_method(sc, port, sc->write_string_symbol, args);
       wrong_type_error_nr(sc, sc->write_string_symbol, 2, port, an_output_port_or_f_string);
     }
@@ -29249,11 +29249,11 @@ static s7_pointer file_read_name_or_sharp(s7_scheme *sc, s7_pointer pt, bool ato
   else
     {
       if (c != EOF)
-	{
-	  if (c == '\n')
-	    port_line_number(pt)--;
-	  ungetc(c, port_file(pt));
-	}
+        {
+          if (c == '\n')
+            port_line_number(pt)--;
+          ungetc(c, port_file(pt));
+        }
       sc->strbuf[i - 1] = '\0';
     }
   if (atom_case)
@@ -29278,7 +29278,7 @@ static s7_pointer string_read_name_no_free(s7_scheme *sc, s7_pointer pt)
       while (char_ok_in_a_name[*str]) str++;
       k = str - orig_str;
       if (*str != 0)
-	port_position(pt) += (k - 1);
+        port_position(pt) += (k - 1);
       else port_position(pt) = port_data_size(pt);
       /* this is equivalent to:
        *    str = strpbrk(str, "(); \"\t\r\n");
@@ -29286,11 +29286,11 @@ static s7_pointer string_read_name_no_free(s7_scheme *sc, s7_pointer pt)
        * but slightly faster.
        */
       if (!number_table[*orig_str])
-	return(inline_make_symbol(sc, (const char *)orig_str, k));
+        return(inline_make_symbol(sc, (const char *)orig_str, k));
 
       /* eval_c_string string is a constant so we can't set and unset the token's end char */
       if ((k + 1) >= sc->strbuf_size)
-	resize_strbuf(sc, k + 1);
+        resize_strbuf(sc, k + 1);
 
       memcpy((void *)(sc->strbuf), (void *)orig_str, k);
       sc->strbuf[k] = '\0';
@@ -29321,7 +29321,7 @@ static s7_pointer string_read_sharp(s7_scheme *sc, s7_pointer pt)
       k = str - orig_str;
       port_position(pt) += (k - 1);
       if ((k + 1) >= sc->strbuf_size)
-	resize_strbuf(sc, k + 1);
+        resize_strbuf(sc, k + 1);
       memcpy((void *)(sc->strbuf), (void *)orig_str, k);
       sc->strbuf[k] = '\0';
       return(make_sharp_constant(sc, sc->strbuf, WITH_OVERFLOW_ERROR, pt, true));
@@ -29356,7 +29356,7 @@ static s7_pointer string_read_name(s7_scheme *sc, s7_pointer pt)
       k = str - orig_str;
       port_position(pt) += (k - 1);
       if (!number_table[*orig_str])
-	return(inline_make_symbol(sc, (const char *)orig_str, k));
+        return(inline_make_symbol(sc, (const char *)orig_str, k));
       endc = *str;
       *str = 0;
       result = make_atom(sc, (char *)orig_str, BASE_10, SYMBOL_OK, WITH_OVERFLOW_ERROR);
@@ -29441,15 +29441,15 @@ static s7_pointer read_file(s7_scheme *sc, FILE *fp, const char *name, s7_int ma
       uint8_t *content = (uint8_t *)(block_data(block));
       size_t bytes = fread(content, sizeof(uint8_t), size, fp);
       if (bytes != (size_t)size)
-	{
-	  if (current_output_port(sc) != sc->F)
-	    {
-	      char tmp[256];
-	      int32_t len = snprintf(tmp, 256, "(%s \"%s\") read %ld bytes of an expected %" ld64 "?", caller, name, (long)bytes, size);
-	      port_write_string(current_output_port(sc))(sc, tmp, clamp_length(len, 256), current_output_port(sc));
-	    }
-	  size = bytes;
-	}
+        {
+          if (current_output_port(sc) != sc->F)
+            {
+              char tmp[256];
+              int32_t len = snprintf(tmp, 256, "(%s \"%s\") read %ld bytes of an expected %" ld64 "?", caller, name, (long)bytes, size);
+              port_write_string(current_output_port(sc))(sc, tmp, clamp_length(len, 256), current_output_port(sc));
+            }
+          size = bytes;
+        }
       content[size] = '\0';
       content[size + 1] = '\0';
       fclose(fp);
@@ -29506,18 +29506,18 @@ static int32_t remember_file_name(s7_scheme *sc, const char *file)
       int32_t old_size = 0;
       /* what if file_names_size is greater than file_bits in pair|profile_file? */
       if (sc->file_names_size == 0)
-	{
-	  sc->file_names_size = INITIAL_FILE_NAMES_SIZE;
-	  sc->file_names = (s7_pointer *)Malloc(sc->file_names_size * sizeof(s7_pointer));
-	}
+        {
+          sc->file_names_size = INITIAL_FILE_NAMES_SIZE;
+          sc->file_names = (s7_pointer *)Malloc(sc->file_names_size * sizeof(s7_pointer));
+        }
       else
-	{
-	  old_size = sc->file_names_size;
-	  sc->file_names_size *= 2;
-	  sc->file_names = (s7_pointer *)Realloc(sc->file_names, sc->file_names_size * sizeof(s7_pointer));
-	}
+        {
+          old_size = sc->file_names_size;
+          sc->file_names_size *= 2;
+          sc->file_names = (s7_pointer *)Realloc(sc->file_names, sc->file_names_size * sizeof(s7_pointer));
+        }
       for (int32_t i = old_size; i < sc->file_names_size; i++)
-	sc->file_names[i] = sc->F;
+        sc->file_names[i] = sc->F;
     }
   sc->file_names[sc->file_names_top] = s7_make_semipermanent_string(sc, file);
   return(sc->file_names_top);
@@ -29544,7 +29544,7 @@ static bool is_directory(const char *filename)
   #ifdef S_ISDIR
     struct stat statbuf;
     return((stat(filename, &statbuf) >= 0) &&
-	   (S_ISDIR(statbuf.st_mode)));
+           (S_ISDIR(statbuf.st_mode)));
   #endif
 #endif
   return(false);
@@ -29557,14 +29557,14 @@ static block_t *expand_filename(s7_scheme *sc, const char *name)
     {
       char *home = getenv("HOME");
       if (home)
-	{
-	  s7_int len = safe_strlen(name) + safe_strlen(home) + 1;
-	  block_t *b = mallocate(sc, len);
-	  char *filename = (char *)block_data(b);
-	  filename[0] = '\0';
-	  catstrs(filename, len, home, (const char *)(name + 1), (char *)NULL);
-	  return(b);
-	}}
+        {
+          s7_int len = safe_strlen(name) + safe_strlen(home) + 1;
+          block_t *b = mallocate(sc, len);
+          char *filename = (char *)block_data(b);
+          filename[0] = '\0';
+          catstrs(filename, len, home, (const char *)(name + 1), (char *)NULL);
+          return(b);
+        }}
 #endif
   return(NULL);
 }
@@ -29596,7 +29596,7 @@ static s7_pointer open_input_file_1(s7_scheme *sc, const char *name, const char
       fp = fopen(new_name, mode);
       liberate(sc, b);
       if (fp)
-	return(make_input_file(sc, name, fp));
+        return(make_input_file(sc, name, fp));
     }
 #endif
 #endif
@@ -29727,7 +29727,7 @@ s7_pointer s7_open_output_file(s7_scheme *sc, const char *name, const char *mode
     {
 #if (!MS_WINDOWS)
       if (errno == EINVAL)
-	file_error_nr(sc, "open-output-file", "invalid mode", mode);
+        file_error_nr(sc, "open-output-file", "invalid mode", mode);
 #endif
       file_error_nr(sc, "open-output-file", strerror(errno), name);
     }
@@ -29777,7 +29777,7 @@ static s7_pointer g_open_output_file(s7_scheme *sc, s7_pointer args)
 
 static const port_functions_t input_string_functions =
   {string_read_char, input_write_char, input_write_string, string_read_semicolon, terminated_string_read_white_space,
-   string_read_name_no_free, string_read_sharp,	string_read_line, input_display, close_simple_input_string};
+   string_read_name_no_free, string_read_sharp,        string_read_line, input_display, close_simple_input_string};
 
 static s7_pointer open_input_string(s7_scheme *sc, const char *input_string, s7_int len)
 {
@@ -29809,7 +29809,7 @@ static s7_pointer open_input_string(s7_scheme *sc, const char *input_string, s7_
   if ((len > 0) && (input_string[len] != '\0'))
     {
       fprintf(stderr, "%s%s[%d]: input_string is not terminated: len: %" ld64 ", at end: %c%c, str: %s%s\n",
-	      bold_text, __func__, __LINE__, len, input_string[len - 1], input_string[len], input_string, unbold_text);
+              bold_text, __func__, __LINE__, len, input_string[len - 1], input_string[len], input_string, unbold_text);
       if (sc->stop_at_error) abort();
     }
 #endif
@@ -29903,8 +29903,8 @@ static inline void check_get_output_string_port(s7_scheme *sc, s7_pointer p)
     wrong_type_error_nr(sc, sc->get_output_string_symbol, 1, p, wrap_string(sc, "an active (open) string port", 28));
   if (port_position(p) > sc->max_string_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "get-output-string port-position ~D is greater than (*s7* 'max-string-length), ~D", 80),
-			 wrap_integer(sc, port_position(p)), wrap_integer(sc, sc->max_string_length)));
+             set_elist_3(sc, wrap_string(sc, "get-output-string port-position ~D is greater than (*s7* 'max-string-length), ~D", 80),
+                         wrap_integer(sc, port_position(p)), wrap_integer(sc, sc->max_string_length)));
 }
 /* if pos>max and clear, where should the clear be?  Not here because we might want to see output in error handler.
  *   similarly below if pos>size how can we call make_string (out-of-bounds) and ignore error?
@@ -29924,7 +29924,7 @@ If the optional 'clear-port' is #t, the current string is flushed."
     {
       p = cadr(args);
       if (!is_boolean(p))
-	wrong_type_error_nr(sc, sc->get_output_string_symbol, 2, p, sc->type_names[T_BOOLEAN]);
+        wrong_type_error_nr(sc, sc->get_output_string_symbol, 2, p, sc->type_names[T_BOOLEAN]);
       clear_port = (p == sc->T);
     }
   p = car(args);
@@ -29988,7 +29988,7 @@ static s7_pointer g_get_output_string_uncopied(s7_scheme *sc, s7_pointer args)
 static s7_pointer g_closed_input_function_port(s7_scheme *sc, s7_pointer unused_args)
 {
   error_nr(sc, sc->wrong_type_arg_symbol,
-	   set_elist_1(sc, wrap_string(sc, "attempt to read from a closed input-function port", 49)));
+           set_elist_1(sc, wrap_string(sc, "attempt to read from a closed input-function port", 49)));
   return(NULL);
 }
 
@@ -30059,7 +30059,7 @@ static s7_pointer g_open_input_function(s7_scheme *sc, s7_pointer args)
     sole_arg_wrong_type_error_nr(sc, sc->open_input_function_symbol, func, a_procedure_string);
   if (!s7_is_aritable(sc, func, 1))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "input-function-port function, ~A, should take one argument", 58), func));
+             set_elist_2(sc, wrap_string(sc, "input-function-port function, ~A, should take one argument", 58), func));
 
   port = s7_open_input_function(sc, input_scheme_function_wrapper);
   port_set_string_or_function(port, func);
@@ -30115,7 +30115,7 @@ static s7_pointer g_open_output_function(s7_scheme *sc, s7_pointer args)
     sole_arg_wrong_type_error_nr(sc, sc->open_output_function_symbol, func, a_procedure_string);
   if (!s7_is_aritable(sc, func, 1))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "output-function-port function, ~A, should take one argument", 59), func));
+             set_elist_2(sc, wrap_string(sc, "output-function-port function, ~A, should take one argument", 59), func));
 
   port = s7_open_output_function(sc, output_scheme_function_wrapper);
   port_set_string_or_function(port, func);
@@ -30280,11 +30280,11 @@ static s7_pointer g_peek_char(s7_scheme *sc, s7_pointer args)
     {
       clear_multiple_value(res);
       error_nr(sc, sc->bad_result_symbol,
-	       set_elist_2(sc, wrap_string(sc, "input-function-port peek-char returned multiple values: ~S", 58), res));
+               set_elist_2(sc, wrap_string(sc, "input-function-port peek-char returned multiple values: ~S", 58), res));
     }
   if (!is_character(res))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "input-function-port peek-char returned: ~S", 42), res));
+             set_elist_2(sc, wrap_string(sc, "input-function-port peek-char returned: ~S", 42), res));
   return(res);
 }
 
@@ -30358,10 +30358,10 @@ If 'with-eol' is not #f, read-line includes the trailing end-of-line character."
     {
       port = car(args);
       if (!is_input_port(port))
-	return(method_or_bust(sc, port, sc->read_line_symbol, args, an_input_port_string, 1));
+        return(method_or_bust(sc, port, sc->read_line_symbol, args, an_input_port_string, 1));
 
       if (is_not_null(cdr(args)))
-	with_eol = (cadr(args) != sc->F); /* perhaps this should insist on #t: (read-line port (c-pointer 0)) */
+        with_eol = (cadr(args) != sc->F); /* perhaps this should insist on #t: (read-line port (c-pointer 0)) */
     }
   else
     {
@@ -30408,8 +30408,8 @@ static s7_pointer g_read_string(s7_scheme *sc, s7_pointer args)
     out_of_range_error_nr(sc, sc->read_string_symbol, int_one, k, it_is_negative_string);
   if (nchars > sc->max_string_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "read-string first argument ~D is greater than (*s7* 'max-string-length), ~D", 75),
-			 wrap_integer(sc, nchars), wrap_integer(sc, sc->max_string_length)));
+             set_elist_3(sc, wrap_string(sc, "read-string first argument ~D is greater than (*s7* 'max-string-length), ~D", 75),
+                         wrap_integer(sc, nchars), wrap_integer(sc, sc->max_string_length)));
 
   if (!is_null(cdr(args)))
     port = cadr(args);
@@ -30450,12 +30450,12 @@ static s7_pointer g_read_string(s7_scheme *sc, s7_pointer args)
     {
       int32_t c = port_read_character(port)(sc, port);
       if (c == EOF)
-	{
-	  if (i == 0)
-	    return(eof_object);
-	  string_length(s) = i;
-	  return(s);
-	}
+        {
+          if (i == 0)
+            return(eof_object);
+          string_length(s) = i;
+          return(s);
+        }
       str[i] = (uint8_t)c;
     }
   return(s);
@@ -30465,29 +30465,29 @@ static s7_pointer g_read_string(s7_scheme *sc, s7_pointer args)
 /* -------------------------------- read -------------------------------- */
 #define declare_jump_info() bool old_longjmp; setjmp_loc_t old_jump_loc; jump_loc_t jump_loc; Jmp_Buf *old_goto_start; Jmp_Buf new_goto_start
 
-#define store_jump_info(Sc)			\
-  do {						\
-      old_longjmp = Sc->longjmp_ok;		\
-      old_jump_loc = Sc->setjmp_loc;		\
-      old_goto_start = Sc->goto_start;		\
+#define store_jump_info(Sc)                        \
+  do {                                                \
+      old_longjmp = Sc->longjmp_ok;                \
+      old_jump_loc = Sc->setjmp_loc;                \
+      old_goto_start = Sc->goto_start;                \
   } while (0)
 
-#define restore_jump_info(Sc)			\
-  do {						\
-    Sc->longjmp_ok = old_longjmp;		\
-    Sc->setjmp_loc = old_jump_loc;		\
-    Sc->goto_start = old_goto_start;		\
-    if ((jump_loc == ERROR_JUMP) &&		\
-	(Sc->longjmp_ok))			\
-      LongJmp(*(Sc->goto_start), ERROR_JUMP);	\
+#define restore_jump_info(Sc)                        \
+  do {                                                \
+    Sc->longjmp_ok = old_longjmp;                \
+    Sc->setjmp_loc = old_jump_loc;                \
+    Sc->goto_start = old_goto_start;                \
+    if ((jump_loc == ERROR_JUMP) &&                \
+        (Sc->longjmp_ok))                        \
+      LongJmp(*(Sc->goto_start), ERROR_JUMP);        \
   } while (0)
 
-#define set_jump_info(Sc, Tag)			\
-  do {						\
-    Sc->longjmp_ok = true;			\
-    Sc->setjmp_loc = Tag;			\
-    jump_loc = (jump_loc_t)SetJmp(new_goto_start, 1);	\
-    Sc->goto_start = &new_goto_start;		\
+#define set_jump_info(Sc, Tag)                        \
+  do {                                                \
+    Sc->longjmp_ok = true;                        \
+    Sc->setjmp_loc = Tag;                        \
+    jump_loc = (jump_loc_t)SetJmp(new_goto_start, 1);        \
+    Sc->goto_start = &new_goto_start;                \
   } while (0)
 
 static s7_pointer eval(s7_scheme *sc, opcode_t first_op);
@@ -30503,21 +30503,21 @@ s7_pointer s7_read(s7_scheme *sc, s7_pointer port)
       store_jump_info(sc);
       set_jump_info(sc, READ_SET_JUMP);
       if (jump_loc != NO_JUMP)
-	{
-	  if (jump_loc != ERROR_JUMP)
-	    eval(sc, sc->cur_op);
-	}
+        {
+          if (jump_loc != ERROR_JUMP)
+            eval(sc, sc->cur_op);
+        }
       else
-	{
-	  push_stack_no_let_no_code(sc, OP_BARRIER, port);
-	  push_stack_direct(sc, OP_EVAL_DONE);
-	  eval(sc, OP_READ_INTERNAL);
-	  if (sc->tok == TOKEN_EOF)
-	    sc->value = eof_object;
-	  if ((sc->cur_op == OP_EVAL_DONE) && /* pushed above */
-	      (stack_top_op(sc) == OP_BARRIER))
-	    pop_stack(sc);
-	}
+        {
+          push_stack_no_let_no_code(sc, OP_BARRIER, port);
+          push_stack_direct(sc, OP_EVAL_DONE);
+          eval(sc, OP_READ_INTERNAL);
+          if (sc->tok == TOKEN_EOF)
+            sc->value = eof_object;
+          if ((sc->cur_op == OP_EVAL_DONE) && /* pushed above */
+              (stack_top_op(sc) == OP_BARRIER))
+            pop_stack(sc);
+        }
       pop_input_port(sc);
       set_curlet(sc, old_let);
       restore_jump_info(sc);
@@ -30547,10 +30547,10 @@ static s7_pointer g_read(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer res = (*(port_input_function(port)))(sc, S7_READ, port);
       if (is_multiple_value(res))
-	{
-	  clear_multiple_value(res);
-	  error_nr(sc, sc->bad_result_symbol, set_elist_2(sc, wrap_string(sc, "input-function-port read returned: ~S", 37), res));
-	}
+        {
+          clear_multiple_value(res);
+          error_nr(sc, sc->bad_result_symbol, set_elist_2(sc, wrap_string(sc, "input-function-port read returned: ~S", 37), res));
+        }
       return(res);
     }
   if ((is_string_port(port)) &&
@@ -30617,25 +30617,25 @@ static block_t *search_load_path(s7_scheme *sc, const char *name)
       char *filename = (char *)block_data(b);
       s7_int name_len = safe_strlen(name);
       for (s7_pointer dir_names = lst; is_pair(dir_names); dir_names = cdr(dir_names))
-	{
-	  const char *new_dir = string_value(car(dir_names));
-	  if (new_dir)
-	    {
-	      if ((WITH_WARNINGS) && (string_length(car(dir_names)) + name_len >= S7_FILENAME_MAX))
-		s7_warn(sc, 256, "load: file + directory name too long: %" ld64 " + %" ld64 " > %d\n",
-			name_len, string_length(car(dir_names)), S7_FILENAME_MAX);
-	      filename[0] = '\0';
-	      if (new_dir[strlen(new_dir) - 1] == '/')
-		catstrs(filename, S7_FILENAME_MAX, new_dir, name, (char *)NULL);
-	      else catstrs(filename, S7_FILENAME_MAX, new_dir, "/", name, (char *)NULL);
+        {
+          const char *new_dir = string_value(car(dir_names));
+          if (new_dir)
+            {
+              if ((WITH_WARNINGS) && (string_length(car(dir_names)) + name_len >= S7_FILENAME_MAX))
+                s7_warn(sc, 256, "load: file + directory name too long: %" ld64 " + %" ld64 " > %d\n",
+                        name_len, string_length(car(dir_names)), S7_FILENAME_MAX);
+              filename[0] = '\0';
+              if (new_dir[strlen(new_dir) - 1] == '/')
+                catstrs(filename, S7_FILENAME_MAX, new_dir, name, (char *)NULL);
+              else catstrs(filename, S7_FILENAME_MAX, new_dir, "/", name, (char *)NULL);
 #ifdef _MSC_VER
-	      if (_access(filename, 0) != -1)
-		return(b);
+              if (_access(filename, 0) != -1)
+                return(b);
 #else
-	      if (access(filename, F_OK) == 0)
-		return(b);
+              if (access(filename, F_OK) == 0)
+                return(b);
 #endif
-	    }}
+            }}
       liberate(sc, b);
     }
   return(NULL);
@@ -30666,18 +30666,18 @@ static block_t *full_filename(s7_scheme *sc, const char *filename)
       block = mallocate(sc, len);
       rtn = (char *)block_data(block);
       if (pwd)
-	{
-	  memcpy((void *)rtn, (void *)pwd, pwd_len);
-	  rtn[pwd_len] = '/';
-	  memcpy((void *)(rtn + pwd_len + 1), (const void *)filename, filename_len);
-	  rtn[pwd_len + filename_len + 1] = '\0';
+        {
+          memcpy((void *)rtn, (void *)pwd, pwd_len);
+          rtn[pwd_len] = '/';
+          memcpy((void *)(rtn + pwd_len + 1), (const void *)filename, filename_len);
+          rtn[pwd_len + filename_len + 1] = '\0';
           free(pwd);
-	}
+        }
       else /* isn't this an error? -- perhaps warn about getcwd, strerror(errno) */
-	{
+        {
           memcpy((void *)rtn, (const void *)filename, filename_len);
           rtn[filename_len] = '\0';
-	}}
+        }}
   return(block);
 }
 
@@ -30695,86 +30695,86 @@ static s7_pointer load_shared_object(s7_scheme *sc, const char *fname, s7_pointe
       block_t *pname = NULL;
 
       if ((access(fname, F_OK) == 0) || (fname[0] == '/'))
-	{
-	  pname = full_filename(sc, fname);
-	  pwd_name = (char *)block_data(pname);
-	}
+        {
+          pname = full_filename(sc, fname);
+          pwd_name = (char *)block_data(pname);
+        }
       else
-	{
-	  block_t *searched = search_load_path(sc, fname); /* returns NULL if *load-path* is nil, or if nothing matches */
-	  if (searched)
-	    {
-	      if (((const char *)block_data(searched))[0] == '/')
-		pname = searched;
-	      else
-		{ /* this is necessary, at least in Linux -- we can't blithely dlopen whatever is passed to us */
-		  pname = full_filename(sc, (const char *)block_data(searched));
-		  liberate(sc, searched);
-		}
-	      pwd_name = (char *)block_data(pname);
-	    }
-	  else /* perhaps no *load-path* entries */
-	    {
-	      pname = full_filename(sc, fname);
-	      pwd_name = (char *)block_data(pname);
-	    }}
+        {
+          block_t *searched = search_load_path(sc, fname); /* returns NULL if *load-path* is nil, or if nothing matches */
+          if (searched)
+            {
+              if (((const char *)block_data(searched))[0] == '/')
+                pname = searched;
+              else
+                { /* this is necessary, at least in Linux -- we can't blithely dlopen whatever is passed to us */
+                  pname = full_filename(sc, (const char *)block_data(searched));
+                  liberate(sc, searched);
+                }
+              pwd_name = (char *)block_data(pname);
+            }
+          else /* perhaps no *load-path* entries */
+            {
+              pname = full_filename(sc, fname);
+              pwd_name = (char *)block_data(pname);
+            }}
       if ((S7_DEBUGGING) && (!pname)) fprintf(stderr, "pname is null\n");
       library = dlopen((pname) ? pwd_name : fname, RTLD_NOW);
       if (!library)
-	s7_warn(sc, 512, "load %s failed: %s\n", (pname) ? pwd_name : fname, dlerror());
+        s7_warn(sc, 512, "load %s failed: %s\n", (pname) ? pwd_name : fname, dlerror());
       else
-	if (let) /* look for 'init_func in let -- let has been checked by caller that it actually is a let */
-	  {
-	    s7_pointer init = let_ref_p_pp(sc, let, make_symbol(sc, "init_func", 9));
-	    /* init is a symbol (surely not a gensym?), so it should not need to be protected */
-	    if (!is_symbol(init))
-	      s7_warn(sc, 512, "can't load %s: no init function\n", fname);
-	    else
-	      {
-		const char *init_name;
-		void *init_func;
-
-		if (hook_has_functions(sc->load_hook))
-		  s7_apply_function(sc, sc->load_hook, set_plist_1(sc, s7_make_string(sc, (pname) ? (const char *)pwd_name : fname)));
-
-		init_name = symbol_name(init);
-		init_func = dlsym(library, init_name);
-		if (init_func)
-		  {
-		    typedef void (*dl_func)(s7_scheme *sc);
-		    typedef s7_pointer (*dl_func_with_args)(s7_scheme *sc, s7_pointer args);
-		    s7_pointer init_args = let_ref_p_pp(sc, let, make_symbol(sc, "init_args", 9));
-		    s7_pointer p;
-		    gc_protect_via_stack(sc, init_args);
-		    if (is_pair(init_args))
-		      {
-			p = ((dl_func_with_args)init_func)(sc, init_args);
-			set_stack_protected2(sc, p);
-		      }
-		    /* if caller includes init_args, but init_func is actually a dl_func, it seems to be ok,
-		     *   but the returned value is whatever was last computed in the init_func.
-		     */
-		    else
-		      {
-			/* if the init_func is expecting args, but caller forgets init_args, this gives a segfault when
-			 *   init_func accesses the forgotten args. s7_is_valid can't catch this currently --
-			 *   we need a better way to tell that a random value can't be a cell pointer (scan permallocs and use heap_location?)
-			 */
-			((dl_func)init_func)(sc);
-			p = sc->F;
-		      }
-		    unstack_gc_protect(sc);
-		    if (pname) liberate(sc, pname);
-		    return(p);
-		  }
-		s7_warn(sc, 512, "loaded %s, but can't find init_func %s, dlerror: %s, let: %s\n",
-			fname, init_name, dlerror(), display(let));
-		dlclose(library);
-	      }
-	    if (S7_DEBUGGING) fprintf(stderr, "init_func trouble in %s, %s\n", fname, display(init));
-	    if (pname) liberate(sc, pname);
-	    return(sc->undefined);
-	  }
+        if (let) /* look for 'init_func in let -- let has been checked by caller that it actually is a let */
+          {
+            s7_pointer init = let_ref_p_pp(sc, let, make_symbol(sc, "init_func", 9));
+            /* init is a symbol (surely not a gensym?), so it should not need to be protected */
+            if (!is_symbol(init))
+              s7_warn(sc, 512, "can't load %s: no init function\n", fname);
+            else
+              {
+                const char *init_name;
+                void *init_func;
+
+                if (hook_has_functions(sc->load_hook))
+                  s7_apply_function(sc, sc->load_hook, set_plist_1(sc, s7_make_string(sc, (pname) ? (const char *)pwd_name : fname)));
+
+                init_name = symbol_name(init);
+                init_func = dlsym(library, init_name);
+                if (init_func)
+                  {
+                    typedef void (*dl_func)(s7_scheme *sc);
+                    typedef s7_pointer (*dl_func_with_args)(s7_scheme *sc, s7_pointer args);
+                    s7_pointer init_args = let_ref_p_pp(sc, let, make_symbol(sc, "init_args", 9));
+                    s7_pointer p;
+                    gc_protect_via_stack(sc, init_args);
+                    if (is_pair(init_args))
+                      {
+                        p = ((dl_func_with_args)init_func)(sc, init_args);
+                        set_stack_protected2(sc, p);
+                      }
+                    /* if caller includes init_args, but init_func is actually a dl_func, it seems to be ok,
+                     *   but the returned value is whatever was last computed in the init_func.
+                     */
+                    else
+                      {
+                        /* if the init_func is expecting args, but caller forgets init_args, this gives a segfault when
+                         *   init_func accesses the forgotten args. s7_is_valid can't catch this currently --
+                         *   we need a better way to tell that a random value can't be a cell pointer (scan permallocs and use heap_location?)
+                         */
+                        ((dl_func)init_func)(sc);
+                        p = sc->F;
+                      }
+                    unstack_gc_protect(sc);
+                    if (pname) liberate(sc, pname);
+                    return(p);
+                  }
+                s7_warn(sc, 512, "loaded %s, but can't find init_func %s, dlerror: %s, let: %s\n",
+                        fname, init_name, dlerror(), display(let));
+                dlclose(library);
+              }
+            if (S7_DEBUGGING) fprintf(stderr, "init_func trouble in %s, %s\n", fname, display(init));
+            if (pname) liberate(sc, pname);
+            return(sc->undefined);
+          }
       if (pname) liberate(sc, pname);
     }
   return(NULL);
@@ -30790,11 +30790,11 @@ static s7_pointer load_file_1(s7_scheme *sc, const char *filename)
     {
       block_t *b = expand_filename(sc, filename);
       if (b)
-	{
-	  fp = fopen((char *)block_data(b), "r");
-	  if (fp) local_file_name = copy_string((char *)block_data(b));
-	  liberate(sc, b);
-	}}
+        {
+          fp = fopen((char *)block_data(b), "r");
+          if (fp) local_file_name = copy_string((char *)block_data(b));
+          liberate(sc, b);
+        }}
 #endif
   if (!fp)
     {
@@ -30810,7 +30810,7 @@ static s7_pointer load_file_1(s7_scheme *sc, const char *filename)
     {
       s7_pointer port;
       if (hook_has_functions(sc->load_hook))
-	s7_apply_function(sc, sc->load_hook, set_plist_1(sc, s7_make_string(sc, (local_file_name) ? local_file_name : filename)));
+        s7_apply_function(sc, sc->load_hook, set_plist_1(sc, s7_make_string(sc, (local_file_name) ? local_file_name : filename)));
       port = read_file(sc, fp, (local_file_name) ? local_file_name : filename, -1, "load"); /* -1 = read entire file into string, this is currently not tweakable */
       port_file_number(port) = remember_file_name(sc, (local_file_name) ? local_file_name : filename);
       if (local_file_name) free(local_file_name);
@@ -30917,10 +30917,10 @@ defaults to the rootlet.  To load into the current environment instead, pass (cu
     {
       s7_pointer e = cadr(args);
       if (!is_let(e))
-	wrong_type_error_nr(sc, sc->load_symbol, 2, e, a_let_string);
+        wrong_type_error_nr(sc, sc->load_symbol, 2, e, a_let_string);
       if (e == sc->s7_starlet)
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_2(sc, wrap_string(sc, "can't load ~S into *s7*", 23), name));
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_2(sc, wrap_string(sc, "can't load ~S into *s7*", 23), name));
       set_curlet(sc, e);
     }
   else set_curlet(sc, sc->rootlet);
@@ -30928,11 +30928,11 @@ defaults to the rootlet.  To load into the current environment instead, pass (cu
   fname = string_value(name);
   if ((!fname) || (!(*fname)))   /* fopen("", "r") returns a file pointer?? */
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_2(sc, wrap_string(sc, "load's first argument, ~S, should be a filename", 47), name));
+             set_elist_2(sc, wrap_string(sc, "load's first argument, ~S, should be a filename", 47), name));
 
   if (is_directory(fname))
     error_nr(sc, sc->io_error_symbol,
-	     set_elist_2(sc, wrap_string(sc, "load: ~S is a directory", 23), wrap_string(sc, fname, safe_strlen(fname))));
+             set_elist_2(sc, wrap_string(sc, "load: ~S is a directory", 23), wrap_string(sc, fname, safe_strlen(fname))));
 #if WITH_C_LOADER
   {
     s7_pointer p = load_shared_object(sc, fname, sc->curlet);
@@ -31004,10 +31004,10 @@ void s7_autoload_set_names(s7_scheme *sc, const char **names, s7_int size)
   if (sc->safety > IMMUTABLE_VECTOR_SAFETY)
     for (int32_t i = 0, k = 2; k < (size * 2); i += 2, k += 2)
       if ((names[i]) && (names[k]) && (strcmp(names[i], names[k]) > 0))
-	{
-	  s7_warn(sc, 256, "%s: names[%d]: %s is out of order\n", __func__, k, names[k]);
-	  break;
-	}
+        {
+          s7_warn(sc, 256, "%s: names[%d]: %s is out of order\n", __func__, k, names[k]);
+          break;
+        }
   if (!sc->autoload_names)
     {
       sc->autoload_names = (const char ***)Calloc(INITIAL_AUTOLOAD_NAMES_SIZE, sizeof(const char **));
@@ -31019,16 +31019,16 @@ void s7_autoload_set_names(s7_scheme *sc, const char **names, s7_int size)
   else
     if (sc->autoload_names_loc >= sc->autoload_names_top)
       {
-	sc->autoload_names_top *= 2;
-	sc->autoload_names = (const char ***)Realloc(sc->autoload_names, sc->autoload_names_top * sizeof(const char **));
-	sc->autoload_names_sizes = (s7_int *)Realloc(sc->autoload_names_sizes, sc->autoload_names_top * sizeof(s7_int));
-	sc->autoloaded_already = (bool **)Realloc(sc->autoloaded_already, sc->autoload_names_top * sizeof(bool *));
-	for (s7_int i = sc->autoload_names_loc; i < sc->autoload_names_top; i++)
-	  {
-	    sc->autoload_names[i] = NULL;
-	    sc->autoload_names_sizes[i] = 0;
-	    sc->autoloaded_already[i] = NULL;
-	  }}
+        sc->autoload_names_top *= 2;
+        sc->autoload_names = (const char ***)Realloc(sc->autoload_names, sc->autoload_names_top * sizeof(const char **));
+        sc->autoload_names_sizes = (s7_int *)Realloc(sc->autoload_names_sizes, sc->autoload_names_top * sizeof(s7_int));
+        sc->autoloaded_already = (bool **)Realloc(sc->autoloaded_already, sc->autoload_names_top * sizeof(bool *));
+        for (s7_int i = sc->autoload_names_loc; i < sc->autoload_names_top; i++)
+          {
+            sc->autoload_names[i] = NULL;
+            sc->autoload_names_sizes[i] = 0;
+            sc->autoloaded_already[i] = NULL;
+          }}
   sc->autoload_names[sc->autoload_names_loc] = names;
   sc->autoload_names_sizes[sc->autoload_names_loc] = size;
   sc->autoloaded_already[sc->autoload_names_loc] = (bool *)Calloc(size, sizeof(bool));
@@ -31044,23 +31044,23 @@ static const char *find_autoload_name(s7_scheme *sc, s7_pointer symbol, bool *al
       s7_int u = sc->autoload_names_sizes[lib] - 1;
       const char **names = sc->autoload_names[lib];
       while (true)
-	{
-	  s7_int comp, pos;
-	  const char *this_name;
-	  if (u < l) break;
-	  pos = (l + u) / 2;
-	  this_name = names[pos * 2];
-	  comp = strcmp(this_name, name);
-	  if (comp == 0)
-	    {
-	      *already_loaded = sc->autoloaded_already[lib][pos];
-	      if (loading) sc->autoloaded_already[lib][pos] = true;
-	      return(names[pos * 2 + 1]);             /* file name given func name */
-	    }
-	  if (comp < 0)
-	    l = pos + 1;
-	  else u = pos - 1;
-	}}
+        {
+          s7_int comp, pos;
+          const char *this_name;
+          if (u < l) break;
+          pos = (l + u) / 2;
+          this_name = names[pos * 2];
+          comp = strcmp(this_name, name);
+          if (comp == 0)
+            {
+              *already_loaded = sc->autoloaded_already[lib][pos];
+              if (loading) sc->autoloaded_already[lib][pos] = true;
+              return(names[pos * 2 + 1]);             /* file name given func name */
+            }
+          if (comp < 0)
+            l = pos + 1;
+          else u = pos - 1;
+        }}
   return(NULL);
 }
 
@@ -31073,7 +31073,7 @@ s7_pointer s7_autoload(s7_scheme *sc, s7_pointer symbol, s7_pointer file_or_func
     {
       const s7_pointer p = s7_hash_table_ref(sc, sc->autoload_table, symbol);
       if ((p != sc->F) && (p != file_or_function))
-	s7_warn(sc, 256, "'%s autoload value changed\n", symbol_name(symbol));
+        s7_warn(sc, 256, "'%s autoload value changed\n", symbol_name(symbol));
     }
   s7_hash_table_set(sc, sc->autoload_table, symbol, file_or_function);
   return(file_or_function);
@@ -31091,7 +31091,7 @@ in the file, or by the function."
   if (is_string(sym))
     {
       if (string_length(sym) == 0)                   /* (autoload "" ...) */
-	wrong_type_error_nr(sc, sc->autoload_symbol, 1, sym, wrap_string(sc, "a symbol-name or a symbol", 25));
+        wrong_type_error_nr(sc, sc->autoload_symbol, 1, sym, wrap_string(sc, "a symbol-name or a symbol", 25));
       sym = make_symbol(sc, string_value(sym), string_length(sym));
     }
   if (!is_symbol(sym))
@@ -31132,7 +31132,7 @@ static s7_pointer g_autoloader(s7_scheme *sc, s7_pointer args) /* the *autoload*
       bool loaded = false;
       const char *file = find_autoload_name(sc, sym, &loaded, false);
       if (file)
-	return(s7_make_string(sc, file));
+        return(s7_make_string(sc, file));
     }
   if (is_hash_table(sc->autoload_table))
     return(s7_hash_table_ref(sc, sc->autoload_table, sym));
@@ -31169,35 +31169,35 @@ The symbols refer to the argument to \"provide\".  (require lint.scm)"
     {
       s7_pointer sym;
       if (is_symbol(car(p)))
-	sym = car(p);
+        sym = car(p);
       else
-	if ((is_proper_quote(sc, car(p))) &&
-	    (is_symbol(cadar(p))))
-	  sym = cadar(p);
-	else
-	  {
-	    unstack_gc_protect(sc);
-	    error_nr(sc, sc->wrong_type_arg_symbol,
-		     set_elist_2(sc, wrap_string(sc, "require: ~S is not a symbol", 27), car(p)));
-	  }
+        if ((is_proper_quote(sc, car(p))) &&
+            (is_symbol(cadar(p))))
+          sym = cadar(p);
+        else
+          {
+            unstack_gc_protect(sc);
+            error_nr(sc, sc->wrong_type_arg_symbol,
+                     set_elist_2(sc, wrap_string(sc, "require: ~S is not a symbol", 27), car(p)));
+          }
       if ((!is_a_feature(sym, s7_symbol_value(sc, sc->features_symbol))) &&
-	  (sc->is_autoloading))
-	{
-	  s7_pointer f = g_autoloader(sc, set_plist_1(sc, sym));
-	  if (is_false(sc, f))
-	    {
-	      unstack_gc_protect(sc);
-	      error_nr(sc, sc->autoload_error_symbol,
-		       set_elist_2(sc, wrap_string(sc, "require: no autoload info for ~S", 32), sym));
-	    }
-	  if (hook_has_functions(sc->autoload_hook))
-	    s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, f));
-	  if (is_string(f))
-	    s7_load_with_environment(sc, string_value(f), sc->curlet);
-	  else
-	    if (is_closure(f))   /* f should be a function of one argument, the current (calling) environment */
-	      s7_call(sc, f, set_ulist_1(sc, sc->curlet, sc->nil));
-	}}
+          (sc->is_autoloading))
+        {
+          s7_pointer f = g_autoloader(sc, set_plist_1(sc, sym));
+          if (is_false(sc, f))
+            {
+              unstack_gc_protect(sc);
+              error_nr(sc, sc->autoload_error_symbol,
+                       set_elist_2(sc, wrap_string(sc, "require: no autoload info for ~S", 32), sym));
+            }
+          if (hook_has_functions(sc->autoload_hook))
+            s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, f));
+          if (is_string(f))
+            s7_load_with_environment(sc, string_value(f), sc->curlet);
+          else
+            if (is_closure(f))   /* f should be a function of one argument, the current (calling) environment */
+              s7_call(sc, f, set_ulist_1(sc, sc->curlet, sc->nil));
+        }}
   if (stack_top_op(sc) == OP_GC_PROTECT) unstack_gc_protect(sc); /* op_error_quit if load failed in scheme in Snd */
   return(sc->T);
 }
@@ -31228,9 +31228,9 @@ static s7_pointer g_is_provided(s7_scheme *sc, s7_pointer args)
   for (; x; x = let_outlet(x))
     for (s7_pointer y = let_slots(x); tis_slot(y); y = next_slot(y))
       if ((slot_symbol(y) == sc->features_symbol) &&
-	  (slot_value(y) != topf) &&
-	  (is_a_feature(sym, slot_value(y))))
-	return(sc->T);
+          (slot_value(y) != topf) &&
+          (is_a_feature(sym, slot_value(y))))
+        return(sc->T);
   return(sc->F);
 }
 
@@ -31265,15 +31265,15 @@ static s7_pointer c_provide(s7_scheme *sc, s7_pointer sym)
     {
       s7_pointer lst = slot_value(s7_slot(sc, sc->features_symbol)); /* in either case, we want the current *features* list */
       if (p == sc->undefined)
-	{
-	  /* (setter symbol) follows local lets, so we need to make sure this one is set */
-	  s7_pointer slot = add_slot_checked_with_id(sc, sc->curlet, sc->features_symbol, cons(sc, sym, lst));
-	  slot_set_setter(slot, sc->features_setter);
-	  slot_set_has_setter(slot);
-	}
+        {
+          /* (setter symbol) follows local lets, so we need to make sure this one is set */
+          s7_pointer slot = add_slot_checked_with_id(sc, sc->curlet, sc->features_symbol, cons(sc, sym, lst));
+          slot_set_setter(slot, sc->features_setter);
+          slot_set_has_setter(slot);
+        }
       else
-	if ((!is_a_feature(sym, lst)) && (!is_a_feature(sym, slot_value(p))))
-	  slot_set_value(p, cons(sc, sym, slot_value(p)));
+        if ((!is_a_feature(sym, lst)) && (!is_a_feature(sym, slot_value(p))))
+          slot_set_value(p, cons(sc, sym, slot_value(p)));
     }
   return(sym);
 }
@@ -31316,8 +31316,8 @@ static s7_pointer g_libraries_set(s7_scheme *sc, s7_pointer args) /* *libraries*
     error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "can't set *libraries* to ~S", 27), nf));
   for (s7_pointer p = nf; is_pair(p); p = cdr(p))
     if ((!is_pair(car(p))) ||
-	(!is_string(caar(p))) ||
-	(!is_let(cdar(p))))
+        (!is_string(caar(p))) ||
+        (!is_let(cdar(p))))
       sole_arg_wrong_type_error_nr(sc, sc->libraries_symbol, car(p), wrap_string(sc, "a list of conses of the form (string . let)", 43));
   return(nf);
 }
@@ -31353,7 +31353,7 @@ static s7_pointer g_eval_string(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer e = cadr(args);
       if (!is_let(e))
- 	wrong_type_error_nr(sc, sc->eval_string_symbol, 2, e, a_let_string);
+         wrong_type_error_nr(sc, sc->eval_string_symbol, 2, e, a_let_string);
       set_curlet(sc, e);
     }
   sc->temp3 = sc->args; /* see t101-aux-17.scm */
@@ -31370,15 +31370,15 @@ static s7_pointer op_eval_string(s7_scheme *sc)
     {
       int32_t tk = token(sc);      /* (eval-string "(+ 1 2) ; a comment (not a mistake)") */
       if (tk != TOKEN_EOF)
-	{
-	  s7_pointer trail_data;
-	  s7_int trail_len = port_data_size(current_input_port(sc)) - port_position(current_input_port(sc)) + 1;
-	  if (trail_len > 32) trail_len = 32;
-	  trail_data = wrap_string(sc, (const char *)(port_data(current_input_port(sc)) + port_position(current_input_port(sc)) - 1), trail_len);
-	  s7_close_input_port(sc, current_input_port(sc));
-	  pop_input_port(sc);
-	  error_nr(sc, sc->read_error_symbol, set_elist_2(sc, wrap_string(sc, "eval-string trailing junk: ~S", 29), trail_data));
-	}}
+        {
+          s7_pointer trail_data;
+          s7_int trail_len = port_data_size(current_input_port(sc)) - port_position(current_input_port(sc)) + 1;
+          if (trail_len > 32) trail_len = 32;
+          trail_data = wrap_string(sc, (const char *)(port_data(current_input_port(sc)) + port_position(current_input_port(sc)) - 1), trail_len);
+          s7_close_input_port(sc, current_input_port(sc));
+          pop_input_port(sc);
+          error_nr(sc, sc->read_error_symbol, set_elist_2(sc, wrap_string(sc, "eval-string trailing junk: ~S", 29), trail_data));
+        }}
   s7_close_input_port(sc, current_input_port(sc));
   pop_input_port(sc);
   sc->code = sc->value;
@@ -31412,7 +31412,7 @@ static s7_pointer g_call_with_input_string(s7_scheme *sc, s7_pointer args)
 
   if (!s7_is_aritable(sc, proc, 1))
     wrong_type_error_nr(sc, sc->call_with_input_string_symbol, 2, proc,
-					 wrap_string(sc, "a procedure of one argument (the port)", 38));
+                                         wrap_string(sc, "a procedure of one argument (the port)", 38));
   if ((is_continuation(proc)) || (is_goto(proc)))
     wrong_type_error_nr(sc, sc->call_with_input_string_symbol, 2, proc, a_normal_procedure_string);
   return(call_with_input(sc, open_and_protect_input_string(sc, str), args));
@@ -31431,7 +31431,7 @@ static s7_pointer g_call_with_input_file(s7_scheme *sc, s7_pointer args)
 
   if (!s7_is_aritable(sc, proc, 1))
     wrong_type_error_nr(sc, sc->call_with_input_file_symbol, 2, proc,
-					 wrap_string(sc, "a procedure of one argument (the port)", 38));
+                                         wrap_string(sc, "a procedure of one argument (the port)", 38));
   if ((is_continuation(proc)) || (is_goto(proc)))
     wrong_type_error_nr(sc, sc->call_with_input_file_symbol, 2, proc, a_normal_procedure_string);
   return(call_with_input(sc, open_input_file_1(sc, string_value(str), "r", "call-with-input-file"), args));
@@ -31457,7 +31457,7 @@ static s7_int procedure_required_args(s7_scheme *sc, s7_pointer x)
     case T_C_MACRO:    return(c_macro_min_args(x));
     case T_CLOSURE: case T_MACRO: case T_BACRO:
       if (closure_arity_unknown(x))
-	closure_set_arity(x, s7_list_length(sc, closure_args(x)));
+        closure_set_arity(x, s7_list_length(sc, closure_args(x)));
       return(s7_int_abs(closure_arity(x)));
     }
   return(0);
@@ -31474,7 +31474,7 @@ static s7_pointer g_with_input_from_string(s7_scheme *sc, s7_pointer args)
   if (proc == global_value(sc->read_symbol))
     {
       if (string_length(str) == 0)
-	return(eof_object);
+        return(eof_object);
       push_input_port(sc, current_input_port(sc));
       set_current_input_port(sc, open_and_protect_input_string(sc, str));
       port_set_string_or_function(current_input_port(sc), str);
@@ -31486,12 +31486,12 @@ static s7_pointer g_with_input_from_string(s7_scheme *sc, s7_pointer args)
   if (!is_thunk(sc, proc))
     {
       if (is_any_procedure(proc))        /* i.e. c_function, lambda, macro, etc */
-	{
-	  s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
-	  error_nr(sc, sc->wrong_type_arg_symbol,
-		   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-input-from-string's second argument should be a thunk", 89),
-			       proc, req_args, req_args));
-	}
+        {
+          s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
+          error_nr(sc, sc->wrong_type_arg_symbol,
+                   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-input-from-string's second argument should be a thunk", 89),
+                               proc, req_args, req_args));
+        }
       else return(method_or_bust(sc, proc, sc->with_input_from_string_symbol, args, a_thunk_string, 2));
     }
   /* since the arguments are evaluated before we get here, we can get some confusing situations:
@@ -31517,12 +31517,12 @@ static s7_pointer g_with_input_from_file(s7_scheme *sc, s7_pointer args)
   if (!is_thunk(sc, proc))
     {
       if (is_any_procedure(proc))        /* i.e. c_function, lambda, macro, etc */
-	{
-	  s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
-	  error_nr(sc, sc->wrong_type_arg_symbol,
-		   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-input-from-file's second argument should be a thunk", 87),
-			       proc, req_args, req_args));
-	}
+        {
+          s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
+          error_nr(sc, sc->wrong_type_arg_symbol,
+                   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-input-from-file's second argument should be a thunk", 87),
+                               proc, req_args, req_args));
+        }
       else return(method_or_bust(sc, proc, sc->with_input_from_file_symbol, args, a_thunk_string, 2));
     }
   return(with_input(sc, open_input_file_1(sc, string_value(str), "r", "with-input-from-file"), args));
@@ -31598,7 +31598,7 @@ static void op_with_io_1_method(s7_scheme *sc)
     {
       s7_pointer method = car(sc->code);
       if (is_c_function(method))            /* #_call-with-input-string et al */
-	method = c_function_name_to_symbol(sc, method);
+        method = c_function_name_to_symbol(sc, method);
       push_stack(sc, OP_GC_PROTECT, lt, sc->code);
       sc->code = caddr(sc->code);
       sc->value = op_lambda(sc, sc->code);  /* don't unstack */
@@ -31650,7 +31650,7 @@ static s7_pointer titr_let(s7_scheme *sc, s7_pointer p, const char *func, int32_
   if (!is_let(iterator_sequence(p)))
     {
       fprintf(stderr, "%s%s[%d]: let iterator sequence is %s%s\n",
-	      bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
+              bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
       if (sc->stop_at_error) abort();
     }
   return(p);
@@ -31661,7 +31661,7 @@ static s7_pointer titr_pair(s7_scheme *sc, s7_pointer p, const char *func, int32
   if (!is_pair(iterator_sequence(p)))
     {
       fprintf(stderr, "%s%s[%d]: pair iterator sequence is %s%s\n",
-	      bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
+              bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
       if (sc->stop_at_error) abort();
     }
   return(p);
@@ -31672,7 +31672,7 @@ static s7_pointer titr_hash(s7_scheme *sc, s7_pointer p, const char *func, int32
   if (!is_hash_table(iterator_sequence(p)))
     {
       fprintf(stderr, "%s%s[%d]: hash iterator sequence is %s%s\n",
-	      bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
+              bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
       if (sc->stop_at_error) abort();
     }
   return(p);
@@ -31683,7 +31683,7 @@ static s7_pointer titr_len(s7_scheme *sc, s7_pointer p, const char *func, int32_
   if ((is_hash_table(iterator_sequence(p))) || (is_pair(iterator_sequence(p))))
     {
       fprintf(stderr, "%s%s[%d]: iterator length sequence is %s%s\n",
-	      bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
+              bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
       if (sc->stop_at_error) abort();
     }
   return(p);
@@ -31695,7 +31695,7 @@ static s7_pointer titr_pos(s7_scheme *sc, s7_pointer p, const char *func, int32_
       (is_pair(iterator_sequence(p))))
     {
       fprintf(stderr, "%s%s[%d]: iterator-position sequence is %s%s\n",
-	      bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
+              bold_text, func, line, checked_type_name(sc, unchecked_type(iterator_sequence(p))), unbold_text);
       if (sc->stop_at_error) abort();
     }
   return(p);
@@ -31782,11 +31782,11 @@ static s7_pointer hash_table_iterate(s7_scheme *sc, s7_pointer iterator)
     {
       hash_entry_t *x = elements[loc];
       if (x)
-	{
-	  iterator_position(iterator) = loc;
-	  iterator_hash_current(iterator) = hash_entry_next(x);
-	  return(hash_entry_to_cons(sc, x, iterator_current(iterator)));
-	}}
+        {
+          iterator_position(iterator) = loc;
+          iterator_hash_current(iterator) = hash_entry_next(x);
+          return(hash_entry_to_cons(sc, x, iterator_current(iterator)));
+        }}
   if (is_weak_hash_table(table))
     {
       clear_weak_hash_iterator(iterator);
@@ -31918,8 +31918,8 @@ static s7_pointer find_make_iterator_method(s7_scheme *sc, s7_pointer e, s7_poin
       it = s7_apply_function(sc, func, set_plist_1(sc, e));
       unstack_gc_protect(sc);
       if (!is_iterator(it))
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_2(sc, wrap_string(sc, "make-iterator method must return an iterator: ~S", 48), it));
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_2(sc, wrap_string(sc, "make-iterator method must return an iterator: ~S", 48), it));
       return(it);
     }
   return(NULL);
@@ -31933,9 +31933,9 @@ static s7_pointer funclet_entry(s7_scheme *sc, s7_pointer x, s7_pointer sym)
     {
       s7_pointer val = symbol_to_local_slot(sc, sym, closure_let(x));
       if ((!is_slot(val)) && (let_outlet(closure_let(x)) != sc->rootlet))
-	val = symbol_to_local_slot(sc, sym, let_outlet(closure_let(x)));
+        val = symbol_to_local_slot(sc, sym, let_outlet(closure_let(x)));
       if (is_slot(val))
-	return(slot_value(val));
+        return(slot_value(val));
     }
   return(NULL);
 }
@@ -31972,14 +31972,14 @@ s7_pointer s7_make_iterator(s7_scheme *sc, s7_pointer e)
     {
     case T_LET:
       if (e == sc->rootlet)
-	{
-	  iterator_set_current_slot(iter, sc->rootlet_slots);
-	  iterator_next(iter) = let_iterate;
-	  iterator_let_cons(iter) = NULL;
-	  return(iter);
-	}
+        {
+          iterator_set_current_slot(iter, sc->rootlet_slots);
+          iterator_next(iter) = let_iterate;
+          iterator_let_cons(iter) = NULL;
+          return(iter);
+        }
       if (e == sc->s7_starlet)
-	return(s7_starlet_make_iterator(sc, iter));
+        return(s7_starlet_make_iterator(sc, iter));
       p = find_make_iterator_method(sc, e, iter);
       if (p) {free_cell(sc, iter); return(p);}
       iterator_set_current_slot(iter, let_slots(e));
@@ -31993,11 +31993,11 @@ s7_pointer s7_make_iterator(s7_scheme *sc, s7_pointer e)
       iterator_position(iter) = -1;
       iterator_next(iter) = hash_table_iterate;
       if (is_weak_hash_table(e))
-	{
-	  set_weak_hash_iterator(iter);
-	  weak_hash_iters(e)++;
-	  add_weak_hash_iterator(sc, iter);
-	}
+        {
+          set_weak_hash_iterator(iter);
+          weak_hash_iters(e)++;
+          add_weak_hash_iterator(sc, iter);
+        }
       break;
 
     case T_STRING:
@@ -32035,19 +32035,19 @@ s7_pointer s7_make_iterator(s7_scheme *sc, s7_pointer e)
     case T_BACRO:   case T_BACRO_STAR:
     case T_CLOSURE: case T_CLOSURE_STAR:
       if (is_iterable_closure(sc, e))
-	{
-	  p = list_1_unchecked(sc, int_zero);
-	  iterator_current(iter) = p;
-	  set_mark_seq(iter);
-	  iterator_next(iter) = closure_iterate;
-	  iterator_length(iter) = (has_active_methods(sc, e)) ? closure_length(sc, e) : S7_INT64_MAX;
-	}
+        {
+          p = list_1_unchecked(sc, int_zero);
+          iterator_current(iter) = p;
+          set_mark_seq(iter);
+          iterator_next(iter) = closure_iterate;
+          iterator_length(iter) = (has_active_methods(sc, e)) ? closure_length(sc, e) : S7_INT64_MAX;
+        }
       else
-	{
-	  free_cell(sc, iter);
-	  sole_arg_wrong_type_error_nr(sc, sc->make_iterator_symbol, e,
-				       wrap_string(sc, "a function or macro with a '+iterator+ local that is not #f", 59));
-	}
+        {
+          free_cell(sc, iter);
+          sole_arg_wrong_type_error_nr(sc, sc->make_iterator_symbol, e,
+                                       wrap_string(sc, "a function or macro with a '+iterator+ local that is not #f", 59));
+        }
       break;
 
     case T_C_OBJECT:
@@ -32080,22 +32080,22 @@ in the sequence each time it is called.  When it reaches the end, it returns " I
   if (carrier)
     {
       if (!is_pair(carrier))
-	sole_arg_wrong_type_error_nr(sc, sc->make_iterator_symbol, carrier, sc->type_names[T_PAIR]);
+        sole_arg_wrong_type_error_nr(sc, sc->make_iterator_symbol, carrier, sc->type_names[T_PAIR]);
       if (is_immutable_pair(carrier))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->make_iterator_symbol, carrier));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->make_iterator_symbol, carrier));
 
       if (is_hash_table(iterator_sequence(iter)))
-	{
-	  iterator_current(iter) = carrier;
-	  set_mark_seq(iter);
-	}
+        {
+          iterator_current(iter) = carrier;
+          set_mark_seq(iter);
+        }
       else
-	if ((is_let(iterator_sequence(iter))) &&
-	    (iterator_sequence(iter) != sc->rootlet))
-	  {
-	    iterator_let_cons(iter) = carrier;
-	    set_mark_seq(iter);
-	  }}
+        if ((is_let(iterator_sequence(iter))) &&
+            (iterator_sequence(iter) != sc->rootlet))
+          {
+            iterator_let_cons(iter) = carrier;
+            set_mark_seq(iter);
+          }}
   return(iter);
 }
 
@@ -32178,10 +32178,10 @@ static int32_t shared_ref(shared_info_t *ci, const s7_pointer p)
   for (int32_t i = 0; i < ci->top; i++)
     if (objs[i] == p)
       {
-	int32_t val = ci->refs[i];
-	if (val > 0)
-	  ci->refs[i] = -ci->refs[i];
-	return(val);
+        int32_t val = ci->refs[i];
+        if (val > 0)
+          ci->refs[i] = -ci->refs[i];
+        return(val);
       }
   return(0);
 }
@@ -32192,8 +32192,8 @@ static void flip_ref(shared_info_t *ci, const s7_pointer p)
   for (int32_t i = 0; i < ci->top; i++)
     if (objs[i] == p)
       {
-	ci->refs[i] = -ci->refs[i];
-	break;
+        ci->refs[i] = -ci->refs[i];
+        break;
       }
 }
 
@@ -32234,13 +32234,13 @@ static bool check_collected(s7_pointer top, shared_info_t *ci)
   for (s7_pointer *p = ci->objs; p < objs_end; p++)
     if ((*p) == top)
       {
-	int32_t i = (int32_t)(p - ci->objs);
-	if (ci->refs[i] == 0)
-	  {
-	    ci->has_hits = true;
-	    ci->refs[i] = ++ci->ref;  /* if found, set the ref number */
-	  }
-	break;
+        int32_t i = (int32_t)(p - ci->objs);
+        if (ci->refs[i] == 0)
+          {
+            ci->has_hits = true;
+            ci->refs[i] = ++ci->ref;  /* if found, set the ref number */
+          }
+        break;
       }
   set_cyclic(top);
   return(true);
@@ -32258,7 +32258,7 @@ static bool collect_vector_info(s7_scheme *sc, shared_info_t *ci, s7_pointer top
     {
       plen = sc->print_length;
       if (plen > vector_length(top))
-	plen = vector_length(top);
+        plen = vector_length(top);
     }
   else plen = vector_length(top);
 
@@ -32266,15 +32266,15 @@ static bool collect_vector_info(s7_scheme *sc, shared_info_t *ci, s7_pointer top
     {
       s7_pointer vel = unchecked_vector_element(top, i);   /* "unchecked" because top might be rootlet, I think */
       if ((has_structure(vel)) &&
-	  (collect_shared_info(sc, ci, vel, stop_at_print_length)))
-	{
-	  set_cyclic(vel);
-	  cyclic = true;
-	  if ((is_c_pointer(vel)) ||
-	      (is_iterator(vel)) ||
-	      (is_c_object(vel)))
-	    check_collected(top, ci);
-	}}
+          (collect_shared_info(sc, ci, vel, stop_at_print_length)))
+        {
+          set_cyclic(vel);
+          cyclic = true;
+          if ((is_c_pointer(vel)) ||
+              (is_iterator(vel)) ||
+              (is_c_object(vel)))
+            check_collected(top, ci);
+        }}
   if (cyclic) set_cyclic(top);
   return(cyclic);
 }
@@ -32304,37 +32304,37 @@ static bool collect_shared_info(s7_scheme *sc, shared_info_t *ci, s7_pointer top
     {
       s7_pointer p;
       if ((has_structure(car(top))) &&
-	  (collect_shared_info(sc, ci, car(top), stop_at_print_length)))
-	top_cyclic = true;
+          (collect_shared_info(sc, ci, car(top), stop_at_print_length)))
+        top_cyclic = true;
 
       for (p = cdr(top); is_pair(p); p = cdr(p))
-	{
-	  if (is_collected_or_shared(p))
-	    {
-	      set_cyclic(top);
-	      set_cyclic(p);
-	      if (!is_shared(p))
-		return(check_collected(p, ci));
-	      if (!top_cyclic)
-		for (s7_pointer cp = top; cp != p; cp = cdr(cp)) set_shared(cp);
-	      return(top_cyclic);
-	    }
- 	  set_collected(p);
-	  if (ci->top == ci->size)
-	    enlarge_shared_info(ci);
-	  ci->objs[ci->top++] = p;
-	  if ((has_structure(car(p))) &&
-	      (collect_shared_info(sc, ci, car(p), stop_at_print_length)))
-	    top_cyclic = true;
-	}
+        {
+          if (is_collected_or_shared(p))
+            {
+              set_cyclic(top);
+              set_cyclic(p);
+              if (!is_shared(p))
+                return(check_collected(p, ci));
+              if (!top_cyclic)
+                for (s7_pointer cp = top; cp != p; cp = cdr(cp)) set_shared(cp);
+              return(top_cyclic);
+            }
+           set_collected(p);
+          if (ci->top == ci->size)
+            enlarge_shared_info(ci);
+          ci->objs[ci->top++] = p;
+          if ((has_structure(car(p))) &&
+              (collect_shared_info(sc, ci, car(p), stop_at_print_length)))
+            top_cyclic = true;
+        }
       if ((has_structure(p)) &&
-	  (collect_shared_info(sc, ci, p, stop_at_print_length)))
-	{
-	  set_cyclic(top);
-	  return(true);
-	}
+          (collect_shared_info(sc, ci, p, stop_at_print_length)))
+        {
+          set_cyclic(top);
+          return(true);
+        }
       if (!top_cyclic)
-	for (s7_pointer cp = top; is_pair(cp); cp = cdr(cp)) set_shared(cp);
+        for (s7_pointer cp = top; is_pair(cp); cp = cdr(cp)) set_shared(cp);
       else set_cyclic(top);
       return(top_cyclic);
     }
@@ -32343,105 +32343,105 @@ static bool collect_shared_info(s7_scheme *sc, shared_info_t *ci, s7_pointer top
     {
     case T_VECTOR:
       if (collect_vector_info(sc, ci, top, stop_at_print_length))
-	top_cyclic = true;
+        top_cyclic = true;
       break;
 
     case T_ITERATOR:
       if ((is_sequence(iterator_sequence(top))) && /* might be a function with +iterator+ local */
-	  (collect_shared_info(sc, ci, iterator_sequence(top), stop_at_print_length)))
-	{
-	  if (peek_shared_ref(ci, iterator_sequence(top)) == 0)
-	    check_collected(iterator_sequence(top), ci);
-	  top_cyclic = true;
-	}
+          (collect_shared_info(sc, ci, iterator_sequence(top), stop_at_print_length)))
+        {
+          if (peek_shared_ref(ci, iterator_sequence(top)) == 0)
+            check_collected(iterator_sequence(top), ci);
+          top_cyclic = true;
+        }
       break;
 
     case T_HASH_TABLE:
       if (hash_table_entries(top) > 0)
-	{
-	  s7_int len = hash_table_size(top);
-	  hash_entry_t **entries = hash_table_elements(top);
-	  bool keys_safe = hash_keys_not_cyclic(sc, top);
-	  for (s7_int i = 0; i < len; i++)
-	    for (hash_entry_t *p = entries[i]; p; p = hash_entry_next(p))
-	      {
-		if ((!keys_safe) &&
-		    (has_structure(hash_entry_key(p))) &&
-		    (collect_shared_info(sc, ci, hash_entry_key(p), stop_at_print_length)))
-		  top_cyclic = true;
-		if ((has_structure(hash_entry_value(p))) &&
-		    (collect_shared_info(sc, ci, hash_entry_value(p), stop_at_print_length)))
-		  {
-		    if ((is_c_pointer(hash_entry_value(p))) ||
-			(is_iterator(hash_entry_value(p))) ||
-			(is_c_object(hash_entry_value(p))))
-		      check_collected(top, ci);
-		    top_cyclic = true;
-		  }}}
+        {
+          s7_int len = hash_table_size(top);
+          hash_entry_t **entries = hash_table_elements(top);
+          bool keys_safe = hash_keys_not_cyclic(sc, top);
+          for (s7_int i = 0; i < len; i++)
+            for (hash_entry_t *p = entries[i]; p; p = hash_entry_next(p))
+              {
+                if ((!keys_safe) &&
+                    (has_structure(hash_entry_key(p))) &&
+                    (collect_shared_info(sc, ci, hash_entry_key(p), stop_at_print_length)))
+                  top_cyclic = true;
+                if ((has_structure(hash_entry_value(p))) &&
+                    (collect_shared_info(sc, ci, hash_entry_value(p), stop_at_print_length)))
+                  {
+                    if ((is_c_pointer(hash_entry_value(p))) ||
+                        (is_iterator(hash_entry_value(p))) ||
+                        (is_c_object(hash_entry_value(p))))
+                      check_collected(top, ci);
+                    top_cyclic = true;
+                  }}}
       break;
 
     case T_SLOT: /* this can be hit if we somehow collect_shared_info on sc->rootlet via collect_vector_info (see the let case below) */
       if ((has_structure(slot_value(top))) &&
-	  (collect_shared_info(sc, ci, slot_value(top), stop_at_print_length)))
-	top_cyclic = true;
+          (collect_shared_info(sc, ci, slot_value(top), stop_at_print_length)))
+        top_cyclic = true;
       break;
 
     case T_LET:
       if (top == sc->rootlet)
-	{
-	  if (collect_vector_info(sc, ci, top, stop_at_print_length))
-	    top_cyclic = true;
-	}
+        {
+          if (collect_vector_info(sc, ci, top, stop_at_print_length))
+            top_cyclic = true;
+        }
       else
-	for (s7_pointer q = top; q; q = let_outlet(q))
-	  for (s7_pointer p = let_slots(q); tis_slot(p); p = next_slot(p))
-	    if ((has_structure(slot_value(p))) &&
-		(collect_shared_info(sc, ci, slot_value(p), stop_at_print_length)))
-	      {
-		top_cyclic = true;
-		if ((is_c_pointer(slot_value(p))) ||
-		    (is_iterator(slot_value(p))) ||
-		    (is_c_object(slot_value(p))))
-		  check_collected(top, ci);
-	      }
+        for (s7_pointer q = top; q; q = let_outlet(q))
+          for (s7_pointer p = let_slots(q); tis_slot(p); p = next_slot(p))
+            if ((has_structure(slot_value(p))) &&
+                (collect_shared_info(sc, ci, slot_value(p), stop_at_print_length)))
+              {
+                top_cyclic = true;
+                if ((is_c_pointer(slot_value(p))) ||
+                    (is_iterator(slot_value(p))) ||
+                    (is_c_object(slot_value(p))))
+                  check_collected(top, ci);
+              }
       break;
 
     case T_CLOSURE:
     case T_CLOSURE_STAR:
       if (collect_shared_info(sc, ci, closure_body(top), stop_at_print_length))
-	{
-	  if (peek_shared_ref(ci, top) == 0)
-	    check_collected(top, ci);
-	  top_cyclic = true;
-	}
+        {
+          if (peek_shared_ref(ci, top) == 0)
+            check_collected(top, ci);
+          top_cyclic = true;
+        }
       break;
 
     case T_C_POINTER:
       if ((has_structure(c_pointer_type(top))) &&
-	  (collect_shared_info(sc, ci, c_pointer_type(top), stop_at_print_length)))
-	{
-	  if (peek_shared_ref(ci, c_pointer_type(top)) == 0)
-	    check_collected(c_pointer_type(top), ci);
-	  top_cyclic = true;
-	}
+          (collect_shared_info(sc, ci, c_pointer_type(top), stop_at_print_length)))
+        {
+          if (peek_shared_ref(ci, c_pointer_type(top)) == 0)
+            check_collected(c_pointer_type(top), ci);
+          top_cyclic = true;
+        }
       if ((has_structure(c_pointer_info(top))) &&
-	  (collect_shared_info(sc, ci, c_pointer_info(top), stop_at_print_length)))
-	{
-	  if (peek_shared_ref(ci, c_pointer_info(top)) == 0)
-	    check_collected(c_pointer_info(top), ci);
-	  top_cyclic = true;
-	}
+          (collect_shared_info(sc, ci, c_pointer_info(top), stop_at_print_length)))
+        {
+          if (peek_shared_ref(ci, c_pointer_info(top)) == 0)
+            check_collected(c_pointer_info(top), ci);
+          top_cyclic = true;
+        }
       break;
 
     case T_C_OBJECT:
       if ((c_object_to_list(sc, top)) &&
-	  (c_object_set(sc, top)) &&
-	  (collect_shared_info(sc, ci, (*(c_object_to_list(sc, top)))(sc, set_plist_1(sc, top)), stop_at_print_length)))
-	{
-	  if (peek_shared_ref(ci, top) == 0)
-	    check_collected(top, ci);
-	  top_cyclic = true;
-	}
+          (c_object_set(sc, top)) &&
+          (collect_shared_info(sc, ci, (*(c_object_to_list(sc, top)))(sc, set_plist_1(sc, top)), stop_at_print_length)))
+        {
+          if (peek_shared_ref(ci, top) == 0)
+            check_collected(top, ci);
+          top_cyclic = true;
+        }
       break;
     }
   if (!top_cyclic)
@@ -32481,7 +32481,7 @@ static inline shared_info_t *clear_shared_info(shared_info_t *ci)
       memclr((void *)(ci->refs), ci->top * sizeof(int32_t));
       memclr((void *)(ci->defined), ci->top * sizeof(bool));
       for (int32_t i = 0; i < ci->top; i++)
-	clear_cyclic_bits(ci->objs[i]); /* LOOP_4 is not faster */
+        clear_cyclic_bits(ci->objs[i]); /* LOOP_4 is not faster */
       ci->top = 0;
     }
   ci->ref = 0;
@@ -32501,65 +32501,65 @@ static shared_info_t *load_shared_info(s7_scheme *sc, s7_pointer top, bool stop_
     {
       s7_pointer x = top;
       if (stop_at_print_length)
-	{
-	  s7_pointer slow = top;
-	  stop_len = sc->print_length;
-	  for (k = 0; k < stop_len; k += 2)
-	    {
-	      if (!is_pair(x)) break;
-	      if (has_structure(car(x))) {no_problem = false; break;}
-	      x = cdr(x);
-	      if (!is_pair(x)) break;
-	      if (has_structure(car(x))) {no_problem = false; break;}
-	      x = cdr(x);
-	      slow = cdr(slow);
-	      if (x == slow) {no_problem = false; break;}
-	    }}
+        {
+          s7_pointer slow = top;
+          stop_len = sc->print_length;
+          for (k = 0; k < stop_len; k += 2)
+            {
+              if (!is_pair(x)) break;
+              if (has_structure(car(x))) {no_problem = false; break;}
+              x = cdr(x);
+              if (!is_pair(x)) break;
+              if (has_structure(car(x))) {no_problem = false; break;}
+              x = cdr(x);
+              slow = cdr(slow);
+              if (x == slow) {no_problem = false; break;}
+            }}
       else
-	if (s7_list_length(sc, top) == 0) /* it is circular at the top level (following cdr) */
-	  no_problem = false;
-	else
-	  for (; is_pair(x); x = cdr(x))
-	    if (has_structure(car(x))) {no_problem = false; break;} /* perhaps (and (length > 0)) or vector typer etc */
+        if (s7_list_length(sc, top) == 0) /* it is circular at the top level (following cdr) */
+          no_problem = false;
+        else
+          for (; is_pair(x); x = cdr(x))
+            if (has_structure(car(x))) {no_problem = false; break;} /* perhaps (and (length > 0)) or vector typer etc */
       if ((no_problem) &&
-	  (!is_null(x)) && (has_structure(x)))
-	no_problem = false;
+          (!is_null(x)) && (has_structure(x)))
+        no_problem = false;
       if (no_problem) return(NULL);
     }
   else
     if (is_t_vector(top)) /* any other vector can't happen */
       {
-	stop_len = vector_length(top);
-	if ((stop_at_print_length) &&
-	    (stop_len > sc->print_length))
-	  stop_len = sc->print_length;
-	for (k = 0; k < stop_len; k++)
-	  if (has_structure(vector_element(top, k))) {no_problem = false; break;}
-	if (no_problem) return(NULL);
+        stop_len = vector_length(top);
+        if ((stop_at_print_length) &&
+            (stop_len > sc->print_length))
+          stop_len = sc->print_length;
+        for (k = 0; k < stop_len; k++)
+          if (has_structure(vector_element(top, k))) {no_problem = false; break;}
+        if (no_problem) return(NULL);
       }
 
   else /* added these 19-Oct-22 -- helps in tgc, but not much elsewhere */
     if ((is_let(top)) && (top != sc->rootlet))
       {
-	for (s7_pointer lp = top; (no_problem) && (lp); lp = let_outlet(lp))
-	  for (s7_pointer p = let_slots(lp); tis_slot(p); p = next_slot(p))
-	    if (has_structure(slot_value(p))) /* slot_symbol need not be checked? */
-	      {no_problem = false; break;}
-	if (no_problem) return(NULL);
+        for (s7_pointer lp = top; (no_problem) && (lp); lp = let_outlet(lp))
+          for (s7_pointer p = let_slots(lp); tis_slot(p); p = next_slot(p))
+            if (has_structure(slot_value(p))) /* slot_symbol need not be checked? */
+              {no_problem = false; break;}
+        if (no_problem) return(NULL);
       }
     else
       if (is_hash_table(top))
-	{
-	  s7_int len = hash_table_size(top);
-	  hash_entry_t **entries = hash_table_elements(top);
-	  bool keys_safe = hash_keys_not_cyclic(sc, top);
-	  if (hash_table_entries(top) == 0) return(NULL);
-	  for (s7_int i = 0; i < len; i++)
-	    for (hash_entry_t *p = entries[i]; p; p = hash_entry_next(p))
-	      if (((!keys_safe) && (has_structure(hash_entry_key(p)))) || (has_structure(hash_entry_value(p))))
-		{no_problem = false; break;}
-	  if (no_problem) return(NULL);
-	}
+        {
+          s7_int len = hash_table_size(top);
+          hash_entry_t **entries = hash_table_elements(top);
+          bool keys_safe = hash_keys_not_cyclic(sc, top);
+          if (hash_table_entries(top) == 0) return(NULL);
+          for (s7_int i = 0; i < len; i++)
+            for (hash_entry_t *p = entries[i]; p; p = hash_entry_next(p))
+              if (((!keys_safe) && (has_structure(hash_entry_key(p)))) || (has_structure(hash_entry_value(p))))
+                {no_problem = false; break;}
+          if (no_problem) return(NULL);
+        }
 
   if ((S7_DEBUGGING) && (is_any_vector(top)) && (!is_t_vector(top))) fprintf(stderr, "%s[%d]: got abnormal vector\n", __func__, __LINE__);
   clear_shared_info(ci);
@@ -32583,17 +32583,17 @@ static shared_info_t *load_shared_info(s7_scheme *sc, s7_pointer top, bool stop_
      */
     for (int32_t i = 0; i < ci->top; i++)
       if (ci_refs[i] > 0)
-	{
-	  set_collected(ci_objs[i]);
-	  if (i == refs)
-	    refs++;
-	  else
-	    {
-	      ci_objs[refs] = ci_objs[i];
-	      ci_refs[refs++] = ci_refs[i];
-	      ci_refs[i] = 0;
-	      ci_objs[i] = NULL;
-	    }}
+        {
+          set_collected(ci_objs[i]);
+          if (i == refs)
+            refs++;
+          else
+            {
+              ci_objs[refs] = ci_objs[i];
+              ci_refs[refs++] = ci_refs[i];
+              ci_refs[i] = 0;
+              ci_objs[i] = NULL;
+            }}
     ci->top = refs;
     return(ci);
   }
@@ -32607,16 +32607,16 @@ static s7_pointer cyclic_sequences_p_p(s7_scheme *sc, s7_pointer obj)
     {
       shared_info_t *ci = (sc->object_out_locked) ? sc->circle_info : load_shared_info(sc, obj, false, sc->circle_info); /* false=don't stop at print length (vectors etc) */
       if (ci)
-	{
-	  s7_pointer lst;
-	  sc->w = sc->nil;
-	  check_free_heap_size(sc, ci->top);
-	  for (int32_t i = 0; i < ci->top; i++)
-	    sc->w = cons_unchecked(sc, ci->objs[i], sc->w);
-	  lst = sc->w;
-	  sc->w = sc->unused;
-	  return(lst);
-	}}
+        {
+          s7_pointer lst;
+          sc->w = sc->nil;
+          check_free_heap_size(sc, ci->top);
+          for (int32_t i = 0; i < ci->top; i++)
+            sc->w = cons_unchecked(sc, ci->objs[i], sc->w);
+          lst = sc->w;
+          sc->w = sc->unused;
+          return(lst);
+        }}
   return(sc->nil);
 }
 
@@ -32636,18 +32636,18 @@ static int32_t circular_list_entries(s7_pointer lst)
     {
       int32_t j = 0;
       for (s7_pointer y = lst; j < i; y = cdr(y), j++)
-	if (x == y)
-	  return(i);
+        if (x == y)
+          return(i);
     }
 }
 
 static void object_to_port_with_circle_check_1(s7_scheme *sc, s7_pointer vr, s7_pointer port, use_write_t use_write, shared_info_t *ci);
 #define object_to_port_with_circle_check(Sc, Vr, Port, Use_Write, Ci) \
-  do {								      \
-    s7_pointer _V_ = Vr;						\
-    if ((Ci) && (has_structure(_V_)))					\
+  do {                                                                      \
+    s7_pointer _V_ = Vr;                                                \
+    if ((Ci) && (has_structure(_V_)))                                        \
       object_to_port_with_circle_check_1(Sc, _V_, Port, Use_Write, Ci); \
-    else object_to_port(Sc, _V_, Port, Use_Write, Ci);			\
+    else object_to_port(Sc, _V_, Port, Use_Write, Ci);                        \
   } while (0)
 
 static void (*display_functions[256])(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_write_t use_write, shared_info_t *ci);
@@ -32672,7 +32672,7 @@ static void slashify_string_to_port(s7_scheme *sc, s7_pointer port, const char *
   if (len == 0)
     {
       if (quoted)
-	port_write_string(port)(sc, "\"\"", 2, port);
+        port_write_string(port)(sc, "\"\"", 2, port);
       return;
     }
   pend = (const uint8_t *)(p + len);
@@ -32695,44 +32695,44 @@ static void slashify_string_to_port(s7_scheme *sc, s7_pointer port, const char *
   for (pcur = (const uint8_t *)p; pcur < pend; pcur++)
     if (slashify_table[*pcur])
       {
-	if (pstart) pstart++; else pstart = (const uint8_t *)p;
-	if (pstart != pcur)
-	  {
-	    port_write_string(port)(sc, (const char *)pstart, pcur - pstart, port);
-	    pstart = pcur;
-	  }
-	port_write_character(port)(sc, '\\', port);
-	switch (*pcur)
-	  {
-	  case '"':   port_write_character(port)(sc, '"', port);   break;
-	  case '\\':  port_write_character(port)(sc, '\\', port);  break;
-	  case '\'':  port_write_character(port)(sc, '\'', port);  break;
-	  case '\t':  port_write_character(port)(sc, 't', port);   break;
-	  case '\r':  port_write_character(port)(sc, 'r', port);   break;
-	  case '\b':  port_write_character(port)(sc, 'b', port);   break;
-	  case '\f':  port_write_character(port)(sc, 'f', port);   break;
-	  case '\?':  port_write_character(port)(sc, '?', port);   break;
-	  case 'x':   port_write_character(port)(sc, 'x', port);   break;
-	  default:
-	    {
-	      char buf[5];
-	      s7_int n = (s7_int)(*pcur);
-	      buf[0] = 'x';
-	      buf[1] = (n < 16) ? '0' : dignum[(n / 16) % 16];
-	      buf[2] = dignum[n % 16];
-	      buf[3] = ';';
-	      buf[4] = '\0';
-	      port_write_string(port)(sc, buf, 4, port);
-	    }
-	    break;
-	  }}
+        if (pstart) pstart++; else pstart = (const uint8_t *)p;
+        if (pstart != pcur)
+          {
+            port_write_string(port)(sc, (const char *)pstart, pcur - pstart, port);
+            pstart = pcur;
+          }
+        port_write_character(port)(sc, '\\', port);
+        switch (*pcur)
+          {
+          case '"':   port_write_character(port)(sc, '"', port);   break;
+          case '\\':  port_write_character(port)(sc, '\\', port);  break;
+          case '\'':  port_write_character(port)(sc, '\'', port);  break;
+          case '\t':  port_write_character(port)(sc, 't', port);   break;
+          case '\r':  port_write_character(port)(sc, 'r', port);   break;
+          case '\b':  port_write_character(port)(sc, 'b', port);   break;
+          case '\f':  port_write_character(port)(sc, 'f', port);   break;
+          case '\?':  port_write_character(port)(sc, '?', port);   break;
+          case 'x':   port_write_character(port)(sc, 'x', port);   break;
+          default:
+            {
+              char buf[5];
+              s7_int n = (s7_int)(*pcur);
+              buf[0] = 'x';
+              buf[1] = (n < 16) ? '0' : dignum[(n / 16) % 16];
+              buf[2] = dignum[n % 16];
+              buf[3] = ';';
+              buf[4] = '\0';
+              port_write_string(port)(sc, buf, 4, port);
+            }
+            break;
+          }}
   if (!pstart)
     port_write_string(port)(sc, (const char *)p, len, port);
   else
     {
       pstart++;
       if (pstart != pcur)
-	port_write_string(port)(sc, (const char *)pstart, pcur - pstart, port);
+        port_write_string(port)(sc, (const char *)pstart, pcur - pstart, port);
     }
   if (quoted) port_write_character(port)(sc, '"', port);
 }
@@ -32745,42 +32745,42 @@ static void output_port_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port,
   else
     if (use_write == P_READABLE)
       {
-	if (port_is_closed(obj))
-	  port_write_string(port)(sc, "(let ((p (open-output-string))) (close-output-port p) p)", 56, port);
-	else
-	  if (is_string_port(obj))
-	    {
-	      port_write_string(port)(sc, "(let ((p (open-output-string)))", 31, port);
-	      if (port_position(obj) > 0)
-		{
-		  port_write_string(port)(sc, " (display ", 10, port);
-		  slashify_string_to_port(sc, port, (const char *)port_data(obj), port_position(obj), IN_QUOTES);
-		  port_write_string(port)(sc, " p)", 3, port);
-		}
-	      port_write_string(port)(sc, " p)", 3, port);
-	    }
-	  else
-	    if (is_file_port(obj))
-	      {
-		char str[256];
-		int32_t nlen;
-		str[0] = '\0';
-		nlen = (int32_t)catstrs(str, 256, "(open-output-file \"", port_filename(obj), "\" \"a\")", (char *)NULL);
-		port_write_string(port)(sc, str, nlen, port);
-	      }
-	    else port_write_string(port)(sc, "#<output-function-port>", 23, port);
+        if (port_is_closed(obj))
+          port_write_string(port)(sc, "(let ((p (open-output-string))) (close-output-port p) p)", 56, port);
+        else
+          if (is_string_port(obj))
+            {
+              port_write_string(port)(sc, "(let ((p (open-output-string)))", 31, port);
+              if (port_position(obj) > 0)
+                {
+                  port_write_string(port)(sc, " (display ", 10, port);
+                  slashify_string_to_port(sc, port, (const char *)port_data(obj), port_position(obj), IN_QUOTES);
+                  port_write_string(port)(sc, " p)", 3, port);
+                }
+              port_write_string(port)(sc, " p)", 3, port);
+            }
+          else
+            if (is_file_port(obj))
+              {
+                char str[256];
+                int32_t nlen;
+                str[0] = '\0';
+                nlen = (int32_t)catstrs(str, 256, "(open-output-file \"", port_filename(obj), "\" \"a\")", (char *)NULL);
+                port_write_string(port)(sc, str, nlen, port);
+              }
+            else port_write_string(port)(sc, "#<output-function-port>", 23, port);
       }
     else
       {
-	if (is_string_port(obj))
-	  port_write_string(port)(sc, "#<output-string-port", 20, port);
-	else
-	  if (is_file_port(obj))
-	    port_write_string(port)(sc, "#<output-file-port", 18, port);
-	  else port_write_string(port)(sc, "#<output-function-port", 22, port);
-	if (port_is_closed(obj))
-	  port_write_string(port)(sc, ":closed>", 8, port);
-	else port_write_character(port)(sc, '>', port);
+        if (is_string_port(obj))
+          port_write_string(port)(sc, "#<output-string-port", 20, port);
+        else
+          if (is_file_port(obj))
+            port_write_string(port)(sc, "#<output-file-port", 18, port);
+          else port_write_string(port)(sc, "#<output-function-port", 22, port);
+        if (port_is_closed(obj))
+          port_write_string(port)(sc, ":closed>", 8, port);
+        else port_write_character(port)(sc, '>', port);
       }
 }
 
@@ -32791,66 +32791,66 @@ static void input_port_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, u
   else
     if (use_write == P_READABLE)
       {
-	if (port_is_closed(obj))
-	  port_write_string(port)(sc, "(call-with-input-string \"\" (lambda (p) p))", 42, port);
-	else
-	  if (is_function_port(obj))
-	    port_write_string(port)(sc, "#<input-function-port>", 22, port);
-	  else
-	    if (is_file_port(obj))
-	      {
-		char str[256];
-		int32_t nlen;
-		str[0] = '\0';
-		nlen = (int32_t)catstrs(str, 256, "(open-input-file \"", port_filename(obj), "\")", (char *)NULL);
-		port_write_string(port)(sc, str, nlen, port);
-	      }
-	    else
-	      {
-		s7_int data_len = port_data_size(obj) - port_position(obj);
-		if (data_len > 100)
-		  {
-		    const char *filename = (const char *)s7_port_filename(sc, obj);
-		    if (filename)
-		      {
+        if (port_is_closed(obj))
+          port_write_string(port)(sc, "(call-with-input-string \"\" (lambda (p) p))", 42, port);
+        else
+          if (is_function_port(obj))
+            port_write_string(port)(sc, "#<input-function-port>", 22, port);
+          else
+            if (is_file_port(obj))
+              {
+                char str[256];
+                int32_t nlen;
+                str[0] = '\0';
+                nlen = (int32_t)catstrs(str, 256, "(open-input-file \"", port_filename(obj), "\")", (char *)NULL);
+                port_write_string(port)(sc, str, nlen, port);
+              }
+            else
+              {
+                s7_int data_len = port_data_size(obj) - port_position(obj);
+                if (data_len > 100)
+                  {
+                    const char *filename = (const char *)s7_port_filename(sc, obj);
+                    if (filename)
+                      {
                         #define DO_STR_LEN 1024
-			char do_str[DO_STR_LEN];
-			int32_t len;
-			do_str[0] = '\0';
-			if (port_position(obj) > 0)
-			  {
-			    len = (int32_t)catstrs(do_str, DO_STR_LEN, "(let ((port (open-input-file \"", filename, "\")))", (char *)NULL);
-			    port_write_string(port)(sc, do_str, len, port);
-			    do_str[0] = '\0';
-			    len = (int32_t)catstrs(do_str, DO_STR_LEN, " (do ((i 0 (+ i 1)) (c (read-char port) (read-char port))) ((= i ",
-						   pos_int_to_str_direct(sc, port_position(obj) - 1),
-						   ") port)))", (char *)NULL);
-			  }
-			else len = (int32_t)catstrs(do_str, DO_STR_LEN, "(open-input-file \"", filename, "\")", (char *)NULL);
-			port_write_string(port)(sc, do_str, len, port);
-			return;
-		      }}
-		port_write_string(port)(sc, "(open-input-string ", 19, port);
-		/* not port_write_string here because there might be embedded double-quotes */
-		slashify_string_to_port(sc, port, (const char *)(port_data(obj) + port_position(obj)), port_data_size(obj) - port_position(obj), IN_QUOTES);
-		port_write_character(port)(sc, ')', port);
-	      }}
+                        char do_str[DO_STR_LEN];
+                        int32_t len;
+                        do_str[0] = '\0';
+                        if (port_position(obj) > 0)
+                          {
+                            len = (int32_t)catstrs(do_str, DO_STR_LEN, "(let ((port (open-input-file \"", filename, "\")))", (char *)NULL);
+                            port_write_string(port)(sc, do_str, len, port);
+                            do_str[0] = '\0';
+                            len = (int32_t)catstrs(do_str, DO_STR_LEN, " (do ((i 0 (+ i 1)) (c (read-char port) (read-char port))) ((= i ",
+                                                   pos_int_to_str_direct(sc, port_position(obj) - 1),
+                                                   ") port)))", (char *)NULL);
+                          }
+                        else len = (int32_t)catstrs(do_str, DO_STR_LEN, "(open-input-file \"", filename, "\")", (char *)NULL);
+                        port_write_string(port)(sc, do_str, len, port);
+                        return;
+                      }}
+                port_write_string(port)(sc, "(open-input-string ", 19, port);
+                /* not port_write_string here because there might be embedded double-quotes */
+                slashify_string_to_port(sc, port, (const char *)(port_data(obj) + port_position(obj)), port_data_size(obj) - port_position(obj), IN_QUOTES);
+                port_write_character(port)(sc, ')', port);
+              }}
     else
       {
-	if (is_string_port(obj))
-	  port_write_string(port)(sc, "#<input-string-port", 19, port);
-	else
-	  if (is_file_port(obj))
-	    port_write_string(port)(sc, "#<input-file-port", 17, port);
-	  else port_write_string(port)(sc, "#<input-function-port", 21, port);
-	if (port_filename(obj))
-	  {
-	    port_write_character(port)(sc, ' ', port);
-	    port_write_string(port)(sc, port_filename(obj), port_filename_length(obj), port);
-	  }
-	if (port_is_closed(obj))
-	  port_write_string(port)(sc, " :closed>", 9, port);
-	else port_write_character(port)(sc, '>', port);
+        if (is_string_port(obj))
+          port_write_string(port)(sc, "#<input-string-port", 19, port);
+        else
+          if (is_file_port(obj))
+            port_write_string(port)(sc, "#<input-file-port", 17, port);
+          else port_write_string(port)(sc, "#<input-function-port", 21, port);
+        if (port_filename(obj))
+          {
+            port_write_character(port)(sc, ' ', port);
+            port_write_string(port)(sc, port_filename(obj), port_filename_length(obj), port);
+          }
+        if (port_is_closed(obj))
+          port_write_string(port)(sc, " :closed>", 9, port);
+        else port_write_character(port)(sc, '>', port);
       }
 }
 
@@ -32888,24 +32888,24 @@ static /* inline */ void symbol_to_port(s7_scheme *sc, s7_pointer obj, s7_pointe
     {
       char c = '\0';
       if ((use_write == P_READABLE) || (use_write == P_CODE))
-	{
-	  if (!is_keyword(obj)) c = '\'';
-	}
+        {
+          if (!is_keyword(obj)) c = '\'';
+        }
       else if ((use_write == P_KEY) && (!is_keyword(obj))) c = ':';
       if (is_string_port(port))
-	{
-	  s7_int new_len = port_position(port) + symbol_name_length(obj) + ((c) ? 1 : 0);
-	  if (new_len >= port_data_size(port))
-	    resize_port_data(sc, port, new_len * 2);
-	  if (c) port_data(port)[port_position(port)++] = c;
-	  memcpy((void *)(port_data(port) + port_position(port)), (void *)symbol_name(obj), symbol_name_length(obj));
-	  port_position(port) = new_len;
-	}
+        {
+          s7_int new_len = port_position(port) + symbol_name_length(obj) + ((c) ? 1 : 0);
+          if (new_len >= port_data_size(port))
+            resize_port_data(sc, port, new_len * 2);
+          if (c) port_data(port)[port_position(port)++] = c;
+          memcpy((void *)(port_data(port) + port_position(port)), (void *)symbol_name(obj), symbol_name_length(obj));
+          port_position(port) = new_len;
+        }
       else
-	{
-	  if (c) port_write_character(port)(sc, c, port);
-	  port_write_string(port)(sc, symbol_name(obj), symbol_name_length(obj), port);
-	}}
+        {
+          if (c) port_write_character(port)(sc, c, port);
+          port_write_string(port)(sc, symbol_name(obj), symbol_name_length(obj), port);
+        }}
 }
 
 static char *multivector_indices_to_string(s7_scheme *sc, s7_int index, s7_pointer vect, char *str, int32_t str_len, int32_t cur_dim)
@@ -32921,44 +32921,44 @@ static char *multivector_indices_to_string(s7_scheme *sc, s7_int index, s7_point
 #define not_p_display(Choice) ((Choice == P_DISPLAY) ? P_WRITE : Choice)
 
 static int32_t multivector_to_port_1(s7_scheme *sc, s7_pointer vec, s7_pointer port,
-				     int32_t out_len, int32_t flat_ref, int32_t dimension, int32_t dimensions, bool *last,
-				     use_write_t use_write, shared_info_t *ci)
+                                     int32_t out_len, int32_t flat_ref, int32_t dimension, int32_t dimensions, bool *last,
+                                     use_write_t use_write, shared_info_t *ci)
 {
   if (use_write != P_READABLE)
     {
       if (*last)
-	port_write_string(port)(sc, " (", 2, port);
+        port_write_string(port)(sc, " (", 2, port);
       else port_write_character(port)(sc, '(', port);
       (*last) = false;
     }
   for (int32_t i = 0; i < vector_dimension(vec, dimension); i++)
     if (dimension == (dimensions - 1))
       {
-	if (flat_ref < out_len)
-	  {
-	    object_to_port_with_circle_check(sc, vector_getter(vec)(sc, vec, flat_ref), port, not_p_display(use_write), ci);
-
-	    if (use_write == P_READABLE)
-	      port_write_string(port)(sc, ") ", 2, port);
-	    flat_ref++;
-	  }
-	else
-	  {
-	    port_write_string(port)(sc, "...)", 4, port);
-	    return(flat_ref);
-	  }
-	if ((use_write != P_READABLE) &&
-	    (i < (vector_dimension(vec, dimension) - 1)))
-	  port_write_character(port)(sc, ' ', port);
+        if (flat_ref < out_len)
+          {
+            object_to_port_with_circle_check(sc, vector_getter(vec)(sc, vec, flat_ref), port, not_p_display(use_write), ci);
+
+            if (use_write == P_READABLE)
+              port_write_string(port)(sc, ") ", 2, port);
+            flat_ref++;
+          }
+        else
+          {
+            port_write_string(port)(sc, "...)", 4, port);
+            return(flat_ref);
+          }
+        if ((use_write != P_READABLE) &&
+            (i < (vector_dimension(vec, dimension) - 1)))
+          port_write_character(port)(sc, ' ', port);
       }
     else
       if (flat_ref < out_len)
-	flat_ref = multivector_to_port_1(sc, vec, port, out_len, flat_ref, dimension + 1, dimensions, last, not_p_display(use_write), ci);
+        flat_ref = multivector_to_port_1(sc, vec, port, out_len, flat_ref, dimension + 1, dimensions, last, not_p_display(use_write), ci);
       else
-	{
-	  port_write_string(port)(sc, "...)", 4, port);
-	  return(flat_ref);
-	}
+        {
+          port_write_string(port)(sc, "...)", 4, port);
+          return(flat_ref);
+        }
   if (use_write != P_READABLE)
     port_write_character(port)(sc, ')', port);
   (*last) = true;
@@ -32966,8 +32966,8 @@ static int32_t multivector_to_port_1(s7_scheme *sc, s7_pointer vec, s7_pointer p
 }
 
 static int32_t multivector_to_port(s7_scheme *sc, s7_pointer vec, s7_pointer port,
-				   int32_t out_len, int32_t flat_ref, int32_t dimension, int32_t dimensions,
-				   use_write_t use_write, shared_info_t *ci)
+                                   int32_t out_len, int32_t flat_ref, int32_t dimension, int32_t dimensions,
+                                   use_write_t use_write, shared_info_t *ci)
 {
   bool last = false;
   return(multivector_to_port_1(sc, vec, port, out_len, flat_ref, dimension, dimensions, &last, use_write, ci));
@@ -32987,7 +32987,7 @@ static void make_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port)
       vtyp = "int-";
     else
       if (is_byte_vector(vect))
-	vtyp = "byte-";
+        vtyp = "byte-";
   vlen = vector_length(vect);
 
   if (vector_rank(vect) == 1)
@@ -33001,10 +33001,10 @@ static void make_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port)
       plen = (int32_t)catstrs_direct(buf, "(make-", vtyp, "vector '(", (const char *)NULL);
       port_write_string(port)(sc, buf, plen, port);
       for (dim = 0; dim < vector_ndims(vect) - 1; dim++)
-	{
-	  plen = (int32_t)catstrs_direct(buf, integer_to_string_no_length(sc, vector_dimension(vect, dim)), " ", (const char *)NULL);
-	  port_write_string(port)(sc, buf, plen, port);
-	}
+        {
+          plen = (int32_t)catstrs_direct(buf, integer_to_string_no_length(sc, vector_dimension(vect, dim)), " ", (const char *)NULL);
+          port_write_string(port)(sc, buf, plen, port);
+        }
       plen = (int32_t)catstrs_direct(buf, integer_to_string_no_length(sc, vector_dimension(vect, dim)), ") ", (const char *)NULL);
       port_write_string(port)(sc, buf, plen, port);
     }
@@ -33035,30 +33035,30 @@ static void vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port, use_
   if (len == 0)
     {
       if (vector_rank(vect) > 1)
-	{
-	  plen = catstrs_direct(buf, "#", pos_int_to_str_direct(sc, vector_ndims(vect)), "d()", (const char *)NULL);
-	  port_write_string(port)(sc, buf, plen, port);
-	}
+        {
+          plen = catstrs_direct(buf, "#", pos_int_to_str_direct(sc, vector_ndims(vect)), "d()", (const char *)NULL);
+          port_write_string(port)(sc, buf, plen, port);
+        }
       else port_write_string(port)(sc, "#()", 3, port);
       return;
     }
   if (use_write != P_READABLE)
     {
       if (sc->print_length == 0)
-	{
-	  if (vector_rank(vect) > 1)
-	    {
-	      plen = catstrs_direct(buf, "#", pos_int_to_str_direct(sc, vector_ndims(vect)), "d(...)", (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	    }
-	  else port_write_string(port)(sc, "#(...)", 6, port);
-	  return;
-	}
+        {
+          if (vector_rank(vect) > 1)
+            {
+              plen = catstrs_direct(buf, "#", pos_int_to_str_direct(sc, vector_ndims(vect)), "d(...)", (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+            }
+          else port_write_string(port)(sc, "#(...)", 6, port);
+          return;
+        }
       if (len > sc->print_length)
-	{
-	  too_long = true;
-	  len = sc->print_length;
-	}}
+        {
+          too_long = true;
+          len = sc->print_length;
+        }}
   if ((!ci) &&
       (len > 1000))
     {
@@ -33066,20 +33066,20 @@ static void vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port, use_
       s7_pointer *els = vector_elements(vect);
       s7_pointer p0 = els[0];
       for (i = 1; i < vlen; i++)
-	if (els[i] != p0)
-	  break;
+        if (els[i] != p0)
+          break;
       if (i == vlen)
-	{
-	  make_vector_to_port(sc, vect, port);
-	  object_to_port(sc, p0, port, use_write, NULL);
-	  if (is_typed_vector(vect))
-	    {
-	      port_write_character(port)(sc, ' ', port);
-	      port_write_vector_typer(sc, vect, port);
-	    }
-	  port_write_character(port)(sc, ')', port);
-	  return;
-	}}
+        {
+          make_vector_to_port(sc, vect, port);
+          object_to_port(sc, p0, port, use_write, NULL);
+          if (is_typed_vector(vect))
+            {
+              port_write_character(port)(sc, ' ', port);
+              port_write_vector_typer(sc, vect, port);
+            }
+          port_write_character(port)(sc, ')', port);
+          return;
+        }}
 
   check_stack_size(sc);
   gc_protect_via_stack(sc, vect);
@@ -33087,153 +33087,153 @@ static void vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port, use_
     {
       int32_t vref;
       if ((ci) &&
-	  (is_cyclic(vect)) &&
-	  ((vref = peek_shared_ref(ci, vect)) != 0))
-	{
-	  s7_pointer *els = vector_elements(vect);
-	  if (vref < 0) vref = -vref;
-	  if ((ci->defined[vref]) || (port == ci->cycle_port))
-	    {
-	      plen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, vref), ">", (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	      unstack_gc_protect(sc);
-	      return;
-	    }
-
-	  if (is_typed_vector(vect))
-	    port_write_string(port)(sc, "(let ((<v> ", 11, port);
-
-	  if (vector_rank(vect) > 1)
-	    port_write_string(port)(sc, "(subvector ", 11, port);
-
-	  port_write_string(port)(sc, "(vector", 7, port); /* top level let */
-	  for (i = 0; i < len; i++)
-	    if (has_structure(els[i]))
-	      {
-		int32_t eref = peek_shared_ref(ci, els[i]);
-		port_write_string(port)(sc, " #f", 3, port);
-		if (eref != 0)
-		  {
-		    if (eref < 0) eref = -eref;
-		    if (vector_rank(vect) > 1)
-		      {
-			s7_int dimension = vector_rank(vect) - 1;
-			int32_t str_len = (dimension < 8) ? 128 : ((dimension + 1) * 16);
-			block_t *b = callocate(sc, str_len);
-			char *indices = (char *)block_data(b);
-			multivector_indices_to_string(sc, i, vect, indices, str_len, dimension); /* calls pos_int_to_str_direct, writes to indices */
-			plen = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, vref), ">",
-					      indices, ") <", pos_int_to_str_direct_1(sc, eref), ">) ", (const char *)NULL);
-			port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
-			liberate(sc, b);
-		      }
-		    else
-		      {
-			size_t len1 = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, vref), "> ", integer_to_string(sc, i, &plen), ") <",
-						     pos_int_to_str_direct_1(sc, eref), ">) ", (const char *)NULL);
-			port_write_string(ci->cycle_port)(sc, buf, len1, ci->cycle_port);
-		      }}
-		else
-		  {
-		    if (vector_rank(vect) > 1)
-		      {
-			s7_int dimension = vector_rank(vect) - 1;
-			int32_t str_len = (dimension < 8) ? 128 : ((dimension + 1) * 16);
-			block_t *b = callocate(sc, str_len);
-			char *indices = (char *)block_data(b);
-			buf[0] = '\0';
-			multivector_indices_to_string(sc, i, vect, indices, str_len, dimension); /* writes to indices */
-			plen = catstrs(buf, 2048, "  (set! (<", pos_int_to_str_direct(sc, vref), ">", indices, ") ", (char *)NULL);
-			port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
-			liberate(sc, b);
-		      }
-		    else
-		      {
-			size_t len1 = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, vref), "> ", integer_to_string_no_length(sc, i), ") ", (const char *)NULL);
-			port_write_string(ci->cycle_port)(sc, buf, len1, ci->cycle_port);
-		      }
-		    object_to_port_with_circle_check(sc, els[i], ci->cycle_port, P_READABLE, ci);
-		    port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
-		  }}
-	    else
-	      {
-		port_write_character(port)(sc, ' ', port);
-		object_to_port_with_circle_check(sc, els[i], port, P_READABLE, ci);
-	      }
-	  port_write_character(port)(sc, ')', port);
-	  if (vector_rank(vect) > 1)
-	    {
-	      plen = catstrs_direct(buf, " 0 ", pos_int_to_str_direct(sc, len), (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	      write_vector_dimensions(sc, vect, port);
-	    }
-	  if (is_typed_vector(vect))
-	    {
-	      port_write_string(port)(sc, ")) (set! (vector-typer <v>) ", 28, port);
-	      port_write_vector_typer(sc, vect, port);
-	      port_write_string(port)(sc, ") <v>)", 6, port);
-	    }}
+          (is_cyclic(vect)) &&
+          ((vref = peek_shared_ref(ci, vect)) != 0))
+        {
+          s7_pointer *els = vector_elements(vect);
+          if (vref < 0) vref = -vref;
+          if ((ci->defined[vref]) || (port == ci->cycle_port))
+            {
+              plen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, vref), ">", (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+              unstack_gc_protect(sc);
+              return;
+            }
+
+          if (is_typed_vector(vect))
+            port_write_string(port)(sc, "(let ((<v> ", 11, port);
+
+          if (vector_rank(vect) > 1)
+            port_write_string(port)(sc, "(subvector ", 11, port);
+
+          port_write_string(port)(sc, "(vector", 7, port); /* top level let */
+          for (i = 0; i < len; i++)
+            if (has_structure(els[i]))
+              {
+                int32_t eref = peek_shared_ref(ci, els[i]);
+                port_write_string(port)(sc, " #f", 3, port);
+                if (eref != 0)
+                  {
+                    if (eref < 0) eref = -eref;
+                    if (vector_rank(vect) > 1)
+                      {
+                        s7_int dimension = vector_rank(vect) - 1;
+                        int32_t str_len = (dimension < 8) ? 128 : ((dimension + 1) * 16);
+                        block_t *b = callocate(sc, str_len);
+                        char *indices = (char *)block_data(b);
+                        multivector_indices_to_string(sc, i, vect, indices, str_len, dimension); /* calls pos_int_to_str_direct, writes to indices */
+                        plen = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, vref), ">",
+                                              indices, ") <", pos_int_to_str_direct_1(sc, eref), ">) ", (const char *)NULL);
+                        port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
+                        liberate(sc, b);
+                      }
+                    else
+                      {
+                        size_t len1 = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, vref), "> ", integer_to_string(sc, i, &plen), ") <",
+                                                     pos_int_to_str_direct_1(sc, eref), ">) ", (const char *)NULL);
+                        port_write_string(ci->cycle_port)(sc, buf, len1, ci->cycle_port);
+                      }}
+                else
+                  {
+                    if (vector_rank(vect) > 1)
+                      {
+                        s7_int dimension = vector_rank(vect) - 1;
+                        int32_t str_len = (dimension < 8) ? 128 : ((dimension + 1) * 16);
+                        block_t *b = callocate(sc, str_len);
+                        char *indices = (char *)block_data(b);
+                        buf[0] = '\0';
+                        multivector_indices_to_string(sc, i, vect, indices, str_len, dimension); /* writes to indices */
+                        plen = catstrs(buf, 2048, "  (set! (<", pos_int_to_str_direct(sc, vref), ">", indices, ") ", (char *)NULL);
+                        port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
+                        liberate(sc, b);
+                      }
+                    else
+                      {
+                        size_t len1 = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, vref), "> ", integer_to_string_no_length(sc, i), ") ", (const char *)NULL);
+                        port_write_string(ci->cycle_port)(sc, buf, len1, ci->cycle_port);
+                      }
+                    object_to_port_with_circle_check(sc, els[i], ci->cycle_port, P_READABLE, ci);
+                    port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
+                  }}
+            else
+              {
+                port_write_character(port)(sc, ' ', port);
+                object_to_port_with_circle_check(sc, els[i], port, P_READABLE, ci);
+              }
+          port_write_character(port)(sc, ')', port);
+          if (vector_rank(vect) > 1)
+            {
+              plen = catstrs_direct(buf, " 0 ", pos_int_to_str_direct(sc, len), (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+              write_vector_dimensions(sc, vect, port);
+            }
+          if (is_typed_vector(vect))
+            {
+              port_write_string(port)(sc, ")) (set! (vector-typer <v>) ", 28, port);
+              port_write_vector_typer(sc, vect, port);
+              port_write_string(port)(sc, ") <v>)", 6, port);
+            }}
       else
-	{
-	  if (is_typed_vector(vect))
-	    port_write_string(port)(sc, "(let ((<v> ", 11, port);
-	  /* (let ((v (make-vector 3 'a symbol?))) (object->string v :readable)): "(let ((<v> (vector 'a 'a 'a))) (set! (vector-typer <v>) symbol?) <v>)" */
-
-	  if (vector_rank(vect) > 1)
-	    port_write_string(port)(sc, "(subvector ", 11, port);
-
-	  if (is_immutable_vector(vect))
-	    port_write_string(port)(sc, "(immutable! ", 12, port);
-
-	  port_write_string(port)(sc, "(vector", 7, port);
-	  for (i = 0; i < len; i++)
-	    {
-	      port_write_character(port)(sc, ' ', port);
-	      object_to_port_with_circle_check(sc, vector_element(vect, i), port, P_READABLE, ci);
-	    }
-
-	  if (is_immutable_vector(vect))
-	    port_write_string(port)(sc, "))", 2, port);
-	  else port_write_character(port)(sc, ')', port);
-
-	  if (vector_rank(vect) > 1)          /* subvector above */
-	    {
-	      plen = catstrs_direct(buf, " 0 ", pos_int_to_str_direct(sc, len), (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	      write_vector_dimensions(sc, vect, port);
-	    }
-	  if (is_typed_vector(vect))
-	    {
-	      port_write_string(port)(sc, ")) (set! (vector-typer <v>) ", 28, port);
-	      port_write_vector_typer(sc, vect, port);
-	      port_write_string(port)(sc, ") <v>)", 6, port);
-	    }}}
+        {
+          if (is_typed_vector(vect))
+            port_write_string(port)(sc, "(let ((<v> ", 11, port);
+          /* (let ((v (make-vector 3 'a symbol?))) (object->string v :readable)): "(let ((<v> (vector 'a 'a 'a))) (set! (vector-typer <v>) symbol?) <v>)" */
+
+          if (vector_rank(vect) > 1)
+            port_write_string(port)(sc, "(subvector ", 11, port);
+
+          if (is_immutable_vector(vect))
+            port_write_string(port)(sc, "(immutable! ", 12, port);
+
+          port_write_string(port)(sc, "(vector", 7, port);
+          for (i = 0; i < len; i++)
+            {
+              port_write_character(port)(sc, ' ', port);
+              object_to_port_with_circle_check(sc, vector_element(vect, i), port, P_READABLE, ci);
+            }
+
+          if (is_immutable_vector(vect))
+            port_write_string(port)(sc, "))", 2, port);
+          else port_write_character(port)(sc, ')', port);
+
+          if (vector_rank(vect) > 1)          /* subvector above */
+            {
+              plen = catstrs_direct(buf, " 0 ", pos_int_to_str_direct(sc, len), (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+              write_vector_dimensions(sc, vect, port);
+            }
+          if (is_typed_vector(vect))
+            {
+              port_write_string(port)(sc, ")) (set! (vector-typer <v>) ", 28, port);
+              port_write_vector_typer(sc, vect, port);
+              port_write_string(port)(sc, ") <v>)", 6, port);
+            }}}
   else /* not readable write */
     {
       if (vector_rank(vect) > 1)
-	{
-	  if (vector_ndims(vect) > 1)
-	    {
-	      plen = catstrs_direct(buf, "#", pos_int_to_str_direct(sc, vector_ndims(vect)), "d", (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	    }
-	  else port_write_character(port)(sc, '#', port);
-	  multivector_to_port(sc, vect, port, len, 0, 0, vector_ndims(vect), use_write, ci);
-	}
+        {
+          if (vector_ndims(vect) > 1)
+            {
+              plen = catstrs_direct(buf, "#", pos_int_to_str_direct(sc, vector_ndims(vect)), "d", (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+            }
+          else port_write_character(port)(sc, '#', port);
+          multivector_to_port(sc, vect, port, len, 0, 0, vector_ndims(vect), use_write, ci);
+        }
       else
-	{
-	  port_write_string(port)(sc, "#(", 2, port);
-	  for (i = 0; i < len - 1; i++)
-	    {
-	      object_to_port_with_circle_check(sc, vector_element(vect, i), port, not_p_display(use_write), ci);
-	      port_write_character(port)(sc, ' ', port);
-	    }
-	  object_to_port_with_circle_check(sc, vector_element(vect, i), port, not_p_display(use_write), ci);
-
-	  if (too_long)
-	    port_write_string(port)(sc, " ...)", 5, port);
-	  else port_write_character(port)(sc, ')', port);
-	}}
+        {
+          port_write_string(port)(sc, "#(", 2, port);
+          for (i = 0; i < len - 1; i++)
+            {
+              object_to_port_with_circle_check(sc, vector_element(vect, i), port, not_p_display(use_write), ci);
+              port_write_character(port)(sc, ' ', port);
+            }
+          object_to_port_with_circle_check(sc, vector_element(vect, i), port, not_p_display(use_write), ci);
+
+          if (too_long)
+            port_write_string(port)(sc, " ...)", 5, port);
+          else port_write_character(port)(sc, ')', port);
+        }}
   unstack_gc_protect(sc);
 }
 
@@ -33248,7 +33248,7 @@ static int32_t print_vector_length(s7_scheme *sc, s7_pointer vect, s7_pointer po
   if (len == 0)
     {
       if (vector_rank(vect) > 1)
-	plen = (int32_t)catstrs_direct(buf, "#", vtype, pos_int_to_str_direct(sc, vector_ndims(vect)), "d()", (const char *)(const char *)NULL);
+        plen = (int32_t)catstrs_direct(buf, "#", vtype, pos_int_to_str_direct(sc, vector_ndims(vect)), "d()", (const char *)(const char *)NULL);
       else plen = (int32_t)catstrs_direct(buf, "#", vtype, "()", (const char *)NULL);
       port_write_string(port)(sc, buf, plen, port);
       return(-1);
@@ -33268,7 +33268,7 @@ static int32_t print_vector_length(s7_scheme *sc, s7_pointer vect, s7_pointer po
       port_write_string(port)(sc, "#i(...)", 7, port);
     else
       if (is_float_vector(vect))
-	port_write_string(port)(sc, "#r(...)", 7, port);
+        port_write_string(port)(sc, "#r(...)", 7, port);
       else port_write_string(port)(sc, "#u(...)", 7, port);
   return(-1);
 }
@@ -33293,60 +33293,60 @@ static void int_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port,
       const s7_int *els = int_vector_ints(vect);
       s7_int first = els[0];
       for (i = 1; i < vlen; i++)
-	if (els[i] != first)
-	  break;
+        if (els[i] != first)
+          break;
       if (i == vlen)
-	{
-	  make_vector_to_port(sc, vect, port);
-	  p = integer_to_string(sc, int_vector(vect, 0), &plen);
-	  port_write_string(port)(sc, p, plen, port);
-	  if ((use_write == P_READABLE) &&
-	      (is_immutable_vector(vect)))
-	    port_write_string(port)(sc, "))", 2, port);
-	  else port_write_character(port)(sc, ')', port);
-	  return;
-	}}
+        {
+          make_vector_to_port(sc, vect, port);
+          p = integer_to_string(sc, int_vector(vect, 0), &plen);
+          port_write_string(port)(sc, p, plen, port);
+          if ((use_write == P_READABLE) &&
+              (is_immutable_vector(vect)))
+            port_write_string(port)(sc, "))", 2, port);
+          else port_write_character(port)(sc, ')', port);
+          return;
+        }}
   if (vector_rank(vect) == 1)
     {
       port_write_string(port)(sc, "#i(", 3, port);
       if (!is_string_port(port))
-	{
-	  p = integer_to_string(sc, int_vector(vect, 0), &plen);
-	  port_write_string(port)(sc, p, plen, port);
-	  for (s7_int i = 1; i < len; i++)
-	    {
-	      plen = catstrs_direct(buf, " ", integer_to_string_no_length(sc, int_vector(vect, i)), (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	    }}
+        {
+          p = integer_to_string(sc, int_vector(vect, 0), &plen);
+          port_write_string(port)(sc, p, plen, port);
+          for (s7_int i = 1; i < len; i++)
+            {
+              plen = catstrs_direct(buf, " ", integer_to_string_no_length(sc, int_vector(vect, i)), (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+            }}
       else
-	{
-	  s7_int new_len = port_position(port);
-	  s7_int next_len = port_data_size(port) - 128;
-	  uint8_t *dbuf = port_data(port);
-	  if (new_len >= next_len)
-	    {
-	      resize_port_data(sc, port, port_data_size(port) * 2);
-	      next_len = port_data_size(port) - 128;
-	      dbuf = port_data(port);
-	    }
-	  p = integer_to_string(sc, int_vector(vect, 0), &plen);
-	  memcpy((void *)(dbuf + new_len), (const void *)p, plen);
-	  new_len += plen;
-	  for (s7_int i = 1; i < len; i++)
-	    {
-	      if (new_len >= next_len)
-		{
-		  resize_port_data(sc, port, port_data_size(port) * 2);
-		  next_len = port_data_size(port) - 128;
-		  dbuf = port_data(port);
-		}
-	      plen = catstrs_direct((char *)(dbuf + new_len), " ", integer_to_string_no_length(sc, int_vector(vect, i)), (const char *)NULL);
-	      new_len += plen;
-	    }
-	  port_position(port) = new_len;
-	}
+        {
+          s7_int new_len = port_position(port);
+          s7_int next_len = port_data_size(port) - 128;
+          uint8_t *dbuf = port_data(port);
+          if (new_len >= next_len)
+            {
+              resize_port_data(sc, port, port_data_size(port) * 2);
+              next_len = port_data_size(port) - 128;
+              dbuf = port_data(port);
+            }
+          p = integer_to_string(sc, int_vector(vect, 0), &plen);
+          memcpy((void *)(dbuf + new_len), (const void *)p, plen);
+          new_len += plen;
+          for (s7_int i = 1; i < len; i++)
+            {
+              if (new_len >= next_len)
+                {
+                  resize_port_data(sc, port, port_data_size(port) * 2);
+                  next_len = port_data_size(port) - 128;
+                  dbuf = port_data(port);
+                }
+              plen = catstrs_direct((char *)(dbuf + new_len), " ", integer_to_string_no_length(sc, int_vector(vect, i)), (const char *)NULL);
+              new_len += plen;
+            }
+          port_position(port) = new_len;
+        }
       if (too_long)
-	port_write_string(port)(sc, " ...)", 5, port);
+        port_write_string(port)(sc, " ...)", 5, port);
       else port_write_character(port)(sc, ')', port);
     }
   else
@@ -33382,18 +33382,18 @@ static void float_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port
       s7_int vlen = vector_length(vect);
       s7_double first = els[0];
       for (i = 1; i < vlen; i++)
-	if (els[i] != first)
-	  break;
+        if (els[i] != first)
+          break;
       if (i == vlen)
-	{
-	  make_vector_to_port(sc, vect, port);
-	  plen = snprintf(buf, FV_BUFSIZE, "%.*g)", sc->float_format_precision, first);
-	  port_write_string(port)(sc, buf, clamp_length(plen, FV_BUFSIZE), port);
-	  if ((use_write == P_READABLE) &&
-	      (is_immutable_vector(vect)))
-	    port_write_character(port)(sc, ')', port);
-	  return;
-	}}
+        {
+          make_vector_to_port(sc, vect, port);
+          plen = snprintf(buf, FV_BUFSIZE, "%.*g)", sc->float_format_precision, first);
+          port_write_string(port)(sc, buf, clamp_length(plen, FV_BUFSIZE), port);
+          if ((use_write == P_READABLE) &&
+              (is_immutable_vector(vect)))
+            port_write_character(port)(sc, ')', port);
+          return;
+        }}
 
   if (vector_rank(vect) == 1)
     {
@@ -33402,14 +33402,14 @@ static void float_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port
       floatify(buf, &plen);
       port_write_string(port)(sc, buf, clamp_length(plen, FV_BUFSIZE), port);
       for (i = 1; i < len; i++)
-	{
-	  plen = snprintf(buf, FV_BUFSIZE - 4, " %.*g", sc->float_format_precision, els[i]);
-	  plen--; /* fixup for the initial #\space */
-	  floatify((char *)(buf + 1), &plen);
-	  port_write_string(port)(sc, buf, clamp_length(plen + 1, FV_BUFSIZE), port);
-	}
+        {
+          plen = snprintf(buf, FV_BUFSIZE - 4, " %.*g", sc->float_format_precision, els[i]);
+          plen--; /* fixup for the initial #\space */
+          floatify((char *)(buf + 1), &plen);
+          port_write_string(port)(sc, buf, clamp_length(plen + 1, FV_BUFSIZE), port);
+        }
       if (too_long)
-	port_write_string(port)(sc, " ...)", 5, port);
+        port_write_string(port)(sc, " ...)", 5, port);
       else port_write_character(port)(sc, ')', port);
     }
   else
@@ -33445,19 +33445,19 @@ static void byte_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port,
       const uint8_t *els = byte_vector_bytes(vect);
       uint8_t first = els[0];
       for (i = 1; i < vlen; i++)
-	if (els[i] != first)
-	  break;
+        if (els[i] != first)
+          break;
       if (i == vlen)
-	{
-	  make_vector_to_port(sc, vect, port);
-	  p = integer_to_string(sc, byte_vector(vect, 0), &plen); /* only 0..10 start out with names: init_small_ints */
-	  port_write_string(port)(sc, p, plen, port);
-	  if ((use_write == P_READABLE) &&
-	      (is_immutable_vector(vect)))
-	    port_write_string(port)(sc, "))", 2, port);
-	  else port_write_character(port)(sc, ')', port);
-	  return;
-	}}
+        {
+          make_vector_to_port(sc, vect, port);
+          p = integer_to_string(sc, byte_vector(vect, 0), &plen); /* only 0..10 start out with names: init_small_ints */
+          port_write_string(port)(sc, p, plen, port);
+          if ((use_write == P_READABLE) &&
+              (is_immutable_vector(vect)))
+            port_write_string(port)(sc, "))", 2, port);
+          else port_write_character(port)(sc, ')', port);
+          return;
+        }}
 
   if (vector_rank(vect) == 1)
     {
@@ -33465,12 +33465,12 @@ static void byte_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port,
       p = integer_to_string(sc, byte_vector(vect, 0), &plen);
       port_write_string(port)(sc, p, plen, port);
       for (i = 1; i < len; i++)
-	{
-	  plen = catstrs_direct(buf, " ", integer_to_string_no_length(sc, byte_vector(vect, i)), (const char *)NULL);
-	  port_write_string(port)(sc, buf, plen, port);
-	}
+        {
+          plen = catstrs_direct(buf, " ", integer_to_string_no_length(sc, byte_vector(vect, i)), (const char *)NULL);
+          port_write_string(port)(sc, buf, plen, port);
+        }
       if (too_long)
-	port_write_string(port)(sc, " ...)", 5, port);
+        port_write_string(port)(sc, " ...)", 5, port);
       else port_write_character(port)(sc, ')', port);
     }
   else
@@ -33487,8 +33487,8 @@ static void byte_vector_to_port(s7_scheme *sc, s7_pointer vect, s7_pointer port,
 static void string_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_write_t use_write, shared_info_t *unused_ci)
 {
   bool immutable = ((use_write == P_READABLE) &&
-		    (is_immutable_string(obj)) &&
-		    (string_length(obj) > 0));  /* (immutable "") looks dumb */
+                    (is_immutable_string(obj)) &&
+                    (string_length(obj) > 0));  /* (immutable "") looks dumb */
   if (immutable)
     port_write_string(port)(sc, "(immutable! ", 12, port);
 
@@ -33496,33 +33496,33 @@ static void string_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_w
     {
       /* since string_length is a scheme length, not C, this write can embed nulls from C's point of view */
       if (string_length(obj) > 1000) /* was 10000 28-Feb-18 */
-	{
-	  size_t size;
-	  char buf[128];
-	  buf[0] = string_value(obj)[0];
-	  buf[1] = '\0';
-	  size = strspn((const char *)(string_value(obj) + 1), buf); /* if all #\null, this won't work */
-	  if (size == (size_t)(string_length(obj) - 1))
-	    {
-	      s7_pointer c = chars[(int32_t)((uint8_t)(buf[0]))];
-	      int32_t nlen = (int32_t)catstrs_direct(buf, "(make-string ", pos_int_to_str_direct(sc, string_length(obj)), " ", (const char *)NULL);
-	      port_write_string(port)(sc, buf, nlen, port);
-	      port_write_string(port)(sc, character_name(c), character_name_length(c), port);
-	      if (immutable)
-		port_write_string(port)(sc, "))", 2, port);
-	      else port_write_character(port)(sc, ')', port);
-	      return;
-	    }}
+        {
+          size_t size;
+          char buf[128];
+          buf[0] = string_value(obj)[0];
+          buf[1] = '\0';
+          size = strspn((const char *)(string_value(obj) + 1), buf); /* if all #\null, this won't work */
+          if (size == (size_t)(string_length(obj) - 1))
+            {
+              s7_pointer c = chars[(int32_t)((uint8_t)(buf[0]))];
+              int32_t nlen = (int32_t)catstrs_direct(buf, "(make-string ", pos_int_to_str_direct(sc, string_length(obj)), " ", (const char *)NULL);
+              port_write_string(port)(sc, buf, nlen, port);
+              port_write_string(port)(sc, character_name(c), character_name_length(c), port);
+              if (immutable)
+                port_write_string(port)(sc, "))", 2, port);
+              else port_write_character(port)(sc, ')', port);
+              return;
+            }}
       if (use_write == P_DISPLAY)
-	port_write_string(port)(sc, string_value(obj), string_length(obj), port);
+        port_write_string(port)(sc, string_value(obj), string_length(obj), port);
       else
-	if (!string_needs_slashification((const uint8_t *)string_value(obj), string_length(obj)))
-	  {
-	    port_write_character(port)(sc, '"', port);
-	    port_write_string(port)(sc, string_value(obj), string_length(obj), port);
-	    port_write_character(port)(sc, '"', port);
-	  }
-	else slashify_string_to_port(sc, port, string_value(obj), string_length(obj), IN_QUOTES);
+        if (!string_needs_slashification((const uint8_t *)string_value(obj), string_length(obj)))
+          {
+            port_write_character(port)(sc, '"', port);
+            port_write_string(port)(sc, string_value(obj), string_length(obj), port);
+            port_write_character(port)(sc, '"', port);
+          }
+        else slashify_string_to_port(sc, port, string_value(obj), string_length(obj), IN_QUOTES);
     }
   else
     if (use_write != P_DISPLAY)
@@ -33558,44 +33558,44 @@ static void simple_list_readable_display(s7_scheme *sc, s7_pointer lst, s7_int t
     {
       port_write_string(port)(sc, "list", 4, port);
       for (x = lst; is_pair(x); x = cdr(x))
-	{
-	  port_write_character(port)(sc, ' ', port);
-	  object_to_port_with_circle_check(sc, car(x), port, P_READABLE, ci);
-	}
+        {
+          port_write_character(port)(sc, ' ', port);
+          object_to_port_with_circle_check(sc, car(x), port, P_READABLE, ci);
+        }
       port_write_character(port)(sc, ')', port);
     }
   else
     {
       s7_int immutable_ctr = 0;
       if (is_immutable_pair(lst))
-	{
-	  port_write_string(port)(sc, "immutable! (cons ", 17, port);
-	  immutable_ctr++;
-	}
+        {
+          port_write_string(port)(sc, "immutable! (cons ", 17, port);
+          immutable_ctr++;
+        }
       else port_write_string(port)(sc, "cons ", 5, port);
       object_to_port_with_circle_check(sc, car(lst), port, P_READABLE, ci);
 
       for (x = cdr(lst); is_pair(x); x = cdr(x))
-	{
-	  if (is_immutable_pair(x))
-	    {
-	      port_write_string(port)(sc, " (immutable! (cons ", 19, port);
-	      immutable_ctr++;
-	    }
-	  else port_write_string(port)(sc, " (cons ", 7, port);
-	  object_to_port_with_circle_check(sc, car(x), port, P_READABLE, ci);
-	}
+        {
+          if (is_immutable_pair(x))
+            {
+              port_write_string(port)(sc, " (immutable! (cons ", 19, port);
+              immutable_ctr++;
+            }
+          else port_write_string(port)(sc, " (cons ", 7, port);
+          object_to_port_with_circle_check(sc, car(x), port, P_READABLE, ci);
+        }
       if (is_null(x))
-	port_write_string(port)(sc, " ()", 3, port);
+        port_write_string(port)(sc, " ()", 3, port);
       else
-	{
-	  port_write_character(port)(sc, ' ', port);
-	  object_to_port_with_circle_check(sc, x, port, P_READABLE, ci);
-	}
+        {
+          port_write_character(port)(sc, ' ', port);
+          object_to_port_with_circle_check(sc, x, port, P_READABLE, ci);
+        }
       for (s7_int i = (true_len <= 0) ? 1 : 0; i < len; i++)
-	port_write_character(port)(sc, ')', port);
+        port_write_character(port)(sc, ')', port);
       for (s7_int i = 0; i < immutable_ctr; i++)
-	port_write_character(port)(sc, ')', port);
+        port_write_character(port)(sc, ')', port);
     }
 }
 
@@ -33614,15 +33614,15 @@ static void pair_to_port(s7_scheme *sc, s7_pointer lst, s7_pointer port, use_wri
     {
       int32_t href = peek_shared_ref(ci, lst);
       if (href != 0)
-	{
-	  if (href < 0) href = -href;
-	  if ((ci->defined[href]) || (port == ci->cycle_port))
-	    {
-	      char buf[128];
-	      int32_t plen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	      return;
-	    }}}
+        {
+          if (href < 0) href = -href;
+          if ((ci->defined[href]) || (port == ci->cycle_port))
+            {
+              char buf[128];
+              int32_t plen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+              return;
+            }}}
   if ((use_write != P_READABLE) &&
       ((car(lst) == sc->quote_function) || (car(lst) == sc->quote_symbol)) &&
       (true_len == 2))
@@ -33636,24 +33636,24 @@ static void pair_to_port(s7_scheme *sc, s7_pointer lst, s7_pointer port, use_wri
        * :readable is tricky because the list might be something like (list 'quote (lambda () #f)) which needs to be evalable back to its original
        */
       if (car(lst) == sc->quote_symbol)
-	port_write_string(port)(sc, "(quote ", 7, port);
+        port_write_string(port)(sc, "(quote ", 7, port);
       else port_write_character(port)(sc, '\'', port);
       if (need_new_ci)
-	{
-	  new_ci = make_shared_info(sc);
-	  /* clear_shared_info(new_ci); */
-	  temp_ci = load_shared_info(sc, cadr(lst), false, new_ci); /* temp_ci can be NULL! */
-	}
+        {
+          new_ci = make_shared_info(sc);
+          /* clear_shared_info(new_ci); */
+          temp_ci = load_shared_info(sc, cadr(lst), false, new_ci); /* temp_ci can be NULL! */
+        }
       else temp_ci = ci;
       if (need_new_ci) sc->object_out_locked = true;
       object_to_port_with_circle_check(sc, cadr(lst), port, P_WRITE, temp_ci);
       if (need_new_ci)
-	{
-	  sc->object_out_locked = old_locked;
-	  free_shared_info(new_ci);
-	}
+        {
+          sc->object_out_locked = old_locked;
+          free_shared_info(new_ci);
+        }
       if (car(lst) == sc->quote_symbol)
-	port_write_character(port)(sc, ')', port);
+        port_write_character(port)(sc, ')', port);
       return;
     }
 #if WITH_IMMUTABLE_UNQUOTE
@@ -33672,202 +33672,202 @@ static void pair_to_port(s7_scheme *sc, s7_pointer lst, s7_pointer port, use_wri
   if (use_write == P_READABLE)
     {
       if (!is_cyclic(lst))
-	{
-	  /* here (and in the cyclic case) we need to handle immutable pairs -- this requires using cons rather than list etc */
-	  simple_list_readable_display(sc, lst, true_len, len, port, ci, immutable);
-	  return;
-	}
+        {
+          /* here (and in the cyclic case) we need to handle immutable pairs -- this requires using cons rather than list etc */
+          simple_list_readable_display(sc, lst, true_len, len, port, ci, immutable);
+          return;
+        }
       if (ci)
-	{
-	  int32_t plen;
-	  s7_pointer local_port;
-	  char buf[128], lst_name[128];
-	  bool lst_local = false;
-	  int32_t lst_ref = peek_shared_ref(ci, lst);
-	  if (lst_ref == 0)
-	    {
-	      s7_pointer p;
-	      for (p = lst; is_pair(p); p = cdr(p))
-		if ((has_structure(car(p))) ||
-		    ((is_pair(cdr(p))) &&
-		     (peek_shared_ref(ci, cdr(p)) != 0)))
-		  {
-		    lst_name[0] = '<'; lst_name[1] = 'L'; lst_name[2] = '>'; lst_name[3] = '\0';
-		    lst_local = true;
-		    port_write_string(port)(sc, "let ((<L> (list", 15, port); /* '(' above */
-		    break;
-		  }
-	      if (!lst_local)
-		{
-		  if (has_structure(p))
-		    {
-		      lst_name[0] = '<'; lst_name[1] = 'L'; lst_name[2] = '>'; lst_name[3] = '\0';
-		      lst_local = true;
-		      port_write_string(port)(sc, "let ((<L> (list", 15, port); /* '(' above */
-		    }
-		  else
-		    {
-		      simple_list_readable_display(sc, lst, true_len, len, port, ci, immutable);
-		      return;
-		    }}}
-	  else
-	    {
-	      if (lst_ref < 0) lst_ref = -lst_ref;
-	      catstrs_direct(lst_name, "<", pos_int_to_str_direct(sc, lst_ref), ">", (const char *)NULL);
-	      port_write_string(port)(sc, "list", 4, port); /* '(' above */
-	    }
-
-	  for (i = 0, x = lst; (i < len) && (is_pair(x)); x = cdr(x), i++)
-	    {
-	      if ((has_structure(car(x))) &&
-		  (is_cyclic(car(x))))
-		port_write_string(port)(sc, " #f", 3, port);
-	      else
-		{
-		  port_write_character(port)(sc, ' ', port);
-		  object_to_port_with_circle_check(sc, car(x), port, use_write, ci);
-		}
-	      if ((is_pair(cdr(x))) &&
-		  (peek_shared_ref(ci, cdr(x)) != 0))
-		break;
-	    }
-
-	  if (lst_local)
-	    port_write_string(port)(sc, "))) ", 4, port);
-	  else port_write_character(port)(sc, ')', port);
-
-	  /* fill in the cyclic entries */
-	  local_port = ((lst_local) || (ci->cycle_port == sc->F)) ? port : ci->cycle_port; /* (object->string (list-values `(x . 1) (signature (int-vector))) :readable) */
-	  for (x = lst, i = 0; (i < len) && (is_pair(x)); x = cdr(x), i++)
-	    {
-	      int32_t lref;
-	      if ((has_structure(car(x))) &&
-		  (is_cyclic(car(x))))
-		{
-		  if (i == 0)
-		    plen = (int32_t)catstrs_direct(buf, "  (set-car! ", lst_name, " ", (const char *)NULL);
-		  else plen = (int32_t)catstrs_direct(buf, "  (set! (", lst_name, " ", pos_int_to_str_direct(sc, i), ") ", (const char *)NULL);
-		  port_write_string(local_port)(sc, buf, plen, local_port);
-		  lref = peek_shared_ref(ci, car(x));
-		  if (lref == 0)
-		    object_to_port_with_circle_check(sc, car(x), local_port, use_write, ci);
-		  else
-		    {
-		      if (lref < 0) lref = -lref;
-		      plen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, lref), ">", (const char *)NULL);
-		      port_write_string(local_port)(sc, buf, plen, local_port);
-		    }
-		  port_write_string(local_port)(sc, ") ", 2, local_port);
-		}
-	      if ((is_pair(cdr(x))) &&
-		  ((lref = peek_shared_ref(ci, cdr(x))) != 0))
-		{
-		  if (lref < 0) lref = -lref;
-		  if (i == 0)
-		    plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ",
-						   "(set-cdr! ", lst_name, " <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
-		  else
-		    if (i == 1)
-		      plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ",
-						     "(set-cdr! (cdr ", lst_name, ") <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
-		    else plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ",
-							"(set-cdr! (list-tail ", lst_name, " ", pos_int_to_str_direct_1(sc, i),
-							") <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
-		  port_write_string(local_port)(sc, buf, plen, local_port);
-		  break;
-		}}
-	  if (true_len < 0) /* dotted list */
-	    {
-	      s7_pointer end_x;
-	      for (end_x = lst; is_pair(end_x); end_x = cdr(end_x)); /* or maybe faster, start at x? */
-	      /* we can't depend on the loops above to set x to the last element because they sometimes break out */
-	      if (true_len == -1) /* cons cell */
-		plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ", "(set-cdr! ", lst_name, " ", (const char *)NULL);
-	      else
-		if (true_len == -2)
-		  plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ", "(set-cdr! (cdr ", lst_name, ") ", (const char *)NULL);
-		else plen = (int32_t)catstrs_direct(buf, "(set-cdr! (list-tail ", lst_name, " ", pos_int_to_str_direct(sc, len - 2), ") ", (const char *)NULL);
-	      port_write_string(local_port)(sc, buf, plen, local_port);
-	      object_to_port_with_circle_check(sc, end_x, local_port, use_write, ci);
-	      port_write_string(local_port)(sc, ") ", 2, local_port);
-	    }
-	  if (lst_local)
-	    port_write_string(local_port)(sc, "    <L>)", 8, local_port);
-	}
+        {
+          int32_t plen;
+          s7_pointer local_port;
+          char buf[128], lst_name[128];
+          bool lst_local = false;
+          int32_t lst_ref = peek_shared_ref(ci, lst);
+          if (lst_ref == 0)
+            {
+              s7_pointer p;
+              for (p = lst; is_pair(p); p = cdr(p))
+                if ((has_structure(car(p))) ||
+                    ((is_pair(cdr(p))) &&
+                     (peek_shared_ref(ci, cdr(p)) != 0)))
+                  {
+                    lst_name[0] = '<'; lst_name[1] = 'L'; lst_name[2] = '>'; lst_name[3] = '\0';
+                    lst_local = true;
+                    port_write_string(port)(sc, "let ((<L> (list", 15, port); /* '(' above */
+                    break;
+                  }
+              if (!lst_local)
+                {
+                  if (has_structure(p))
+                    {
+                      lst_name[0] = '<'; lst_name[1] = 'L'; lst_name[2] = '>'; lst_name[3] = '\0';
+                      lst_local = true;
+                      port_write_string(port)(sc, "let ((<L> (list", 15, port); /* '(' above */
+                    }
+                  else
+                    {
+                      simple_list_readable_display(sc, lst, true_len, len, port, ci, immutable);
+                      return;
+                    }}}
+          else
+            {
+              if (lst_ref < 0) lst_ref = -lst_ref;
+              catstrs_direct(lst_name, "<", pos_int_to_str_direct(sc, lst_ref), ">", (const char *)NULL);
+              port_write_string(port)(sc, "list", 4, port); /* '(' above */
+            }
+
+          for (i = 0, x = lst; (i < len) && (is_pair(x)); x = cdr(x), i++)
+            {
+              if ((has_structure(car(x))) &&
+                  (is_cyclic(car(x))))
+                port_write_string(port)(sc, " #f", 3, port);
+              else
+                {
+                  port_write_character(port)(sc, ' ', port);
+                  object_to_port_with_circle_check(sc, car(x), port, use_write, ci);
+                }
+              if ((is_pair(cdr(x))) &&
+                  (peek_shared_ref(ci, cdr(x)) != 0))
+                break;
+            }
+
+          if (lst_local)
+            port_write_string(port)(sc, "))) ", 4, port);
+          else port_write_character(port)(sc, ')', port);
+
+          /* fill in the cyclic entries */
+          local_port = ((lst_local) || (ci->cycle_port == sc->F)) ? port : ci->cycle_port; /* (object->string (list-values `(x . 1) (signature (int-vector))) :readable) */
+          for (x = lst, i = 0; (i < len) && (is_pair(x)); x = cdr(x), i++)
+            {
+              int32_t lref;
+              if ((has_structure(car(x))) &&
+                  (is_cyclic(car(x))))
+                {
+                  if (i == 0)
+                    plen = (int32_t)catstrs_direct(buf, "  (set-car! ", lst_name, " ", (const char *)NULL);
+                  else plen = (int32_t)catstrs_direct(buf, "  (set! (", lst_name, " ", pos_int_to_str_direct(sc, i), ") ", (const char *)NULL);
+                  port_write_string(local_port)(sc, buf, plen, local_port);
+                  lref = peek_shared_ref(ci, car(x));
+                  if (lref == 0)
+                    object_to_port_with_circle_check(sc, car(x), local_port, use_write, ci);
+                  else
+                    {
+                      if (lref < 0) lref = -lref;
+                      plen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, lref), ">", (const char *)NULL);
+                      port_write_string(local_port)(sc, buf, plen, local_port);
+                    }
+                  port_write_string(local_port)(sc, ") ", 2, local_port);
+                }
+              if ((is_pair(cdr(x))) &&
+                  ((lref = peek_shared_ref(ci, cdr(x))) != 0))
+                {
+                  if (lref < 0) lref = -lref;
+                  if (i == 0)
+                    plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ",
+                                                   "(set-cdr! ", lst_name, " <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
+                  else
+                    if (i == 1)
+                      plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ",
+                                                     "(set-cdr! (cdr ", lst_name, ") <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
+                    else plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ",
+                                                        "(set-cdr! (list-tail ", lst_name, " ", pos_int_to_str_direct_1(sc, i),
+                                                        ") <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
+                  port_write_string(local_port)(sc, buf, plen, local_port);
+                  break;
+                }}
+          if (true_len < 0) /* dotted list */
+            {
+              s7_pointer end_x;
+              for (end_x = lst; is_pair(end_x); end_x = cdr(end_x)); /* or maybe faster, start at x? */
+              /* we can't depend on the loops above to set x to the last element because they sometimes break out */
+              if (true_len == -1) /* cons cell */
+                plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ", "(set-cdr! ", lst_name, " ", (const char *)NULL);
+              else
+                if (true_len == -2)
+                  plen = (int32_t)catstrs_direct(buf, (lst_local) ? "    " : "  ", "(set-cdr! (cdr ", lst_name, ") ", (const char *)NULL);
+                else plen = (int32_t)catstrs_direct(buf, "(set-cdr! (list-tail ", lst_name, " ", pos_int_to_str_direct(sc, len - 2), ") ", (const char *)NULL);
+              port_write_string(local_port)(sc, buf, plen, local_port);
+              object_to_port_with_circle_check(sc, end_x, local_port, use_write, ci);
+              port_write_string(local_port)(sc, ") ", 2, local_port);
+            }
+          if (lst_local)
+            port_write_string(local_port)(sc, "    <L>)", 8, local_port);
+        }
       else simple_list_readable_display(sc, lst, true_len, len, port, ci, immutable);
     }
   else /* not :readable */
     {
       s7_int plen = (len > sc->print_length) ? sc->print_length : len;
       if (plen <= 0)
-	{
-	  port_write_string(port)(sc, "(...))", 6, port); /* open paren above about 150 lines, "list" here is wrong if it's a cons */
-	  return;
-	}
+        {
+          port_write_string(port)(sc, "(...))", 6, port); /* open paren above about 150 lines, "list" here is wrong if it's a cons */
+          return;
+        }
       if (ci)
-	{
-	  for (x = lst, i = 0; (is_pair(x)) && (i < plen) && ((i == 0) || (peek_shared_ref(ci, x) == 0)); i++, x = cdr(x))
-	    {
-	      ci->ctr++;
-	      if (ci->ctr > sc->print_length)
-		{
-		  port_write_string(port)(sc, " ...)", 5, port);
-		  return;
-		}
-	      object_to_port_with_circle_check(sc, car(x), port, not_p_display(use_write), ci);
-	      if (i < (len - 1))
-		port_write_character(port)(sc, ' ', port);
-	    }
-	  if (is_not_null(x))
-	    {
-	      if (plen < len)
-		port_write_string(port)(sc, " ...", 4, port);
-	      else
-		{
-		  if ((true_len == 0) &&
-		      (i == len))
-		    port_write_string(port)(sc, " . ", 3, port);
-		  else port_write_string(port)(sc, ". ", 2, port);
-		  object_to_port_with_circle_check(sc, x, port, not_p_display(use_write), ci);
-		}}
-	  port_write_character(port)(sc, ')', port);
-	}
+        {
+          for (x = lst, i = 0; (is_pair(x)) && (i < plen) && ((i == 0) || (peek_shared_ref(ci, x) == 0)); i++, x = cdr(x))
+            {
+              ci->ctr++;
+              if (ci->ctr > sc->print_length)
+                {
+                  port_write_string(port)(sc, " ...)", 5, port);
+                  return;
+                }
+              object_to_port_with_circle_check(sc, car(x), port, not_p_display(use_write), ci);
+              if (i < (len - 1))
+                port_write_character(port)(sc, ' ', port);
+            }
+          if (is_not_null(x))
+            {
+              if (plen < len)
+                port_write_string(port)(sc, " ...", 4, port);
+              else
+                {
+                  if ((true_len == 0) &&
+                      (i == len))
+                    port_write_string(port)(sc, " . ", 3, port);
+                  else port_write_string(port)(sc, ". ", 2, port);
+                  object_to_port_with_circle_check(sc, x, port, not_p_display(use_write), ci);
+                }}
+          port_write_character(port)(sc, ')', port);
+        }
       else
-	{
-	  s7_int len1 = plen - 1;
-	  if (is_string_port(port))
-	    {
-	      for (x = lst, i = 0; (is_pair(x)) && (i < len1); i++, x = cdr(x))
-		{
-		  object_to_port(sc, car(x), port, not_p_display(use_write), ci);
-		  if (port_position(port) >= sc->objstr_max_len)
-		    return;
-		  if (port_position(port) >= port_data_size(port))
-		    resize_port_data(sc, port, port_data_size(port) * 2);
-		  port_data(port)[port_position(port)++] = (uint8_t)' ';
-		}}
-	  else
-	    for (x = lst, i = 0; (is_pair(x)) && (i < len1); i++, x = cdr(x))
-	      {
-		object_to_port(sc, car(x), port, not_p_display(use_write), ci);  /* lst free here if unprotected */
-		port_write_character(port)(sc, ' ', port);
-	      }
-	  if (is_pair(x))
-	    {
-	      object_to_port(sc, car(x), port, not_p_display(use_write), ci);
-	      x = cdr(x);
-	    }
-	  if (is_not_null(x))
-	    {
-	      if (plen < len)
-		port_write_string(port)(sc, " ...", 4, port);
-	      else
-		{
-		  port_write_string(port)(sc, ". ", 2, port);
-		  object_to_port(sc, x, port, not_p_display(use_write), ci);
-		}}
-	  port_write_character(port)(sc, ')', port);
-	}}
+        {
+          s7_int len1 = plen - 1;
+          if (is_string_port(port))
+            {
+              for (x = lst, i = 0; (is_pair(x)) && (i < len1); i++, x = cdr(x))
+                {
+                  object_to_port(sc, car(x), port, not_p_display(use_write), ci);
+                  if (port_position(port) >= sc->objstr_max_len)
+                    return;
+                  if (port_position(port) >= port_data_size(port))
+                    resize_port_data(sc, port, port_data_size(port) * 2);
+                  port_data(port)[port_position(port)++] = (uint8_t)' ';
+                }}
+          else
+            for (x = lst, i = 0; (is_pair(x)) && (i < len1); i++, x = cdr(x))
+              {
+                object_to_port(sc, car(x), port, not_p_display(use_write), ci);  /* lst free here if unprotected */
+                port_write_character(port)(sc, ' ', port);
+              }
+          if (is_pair(x))
+            {
+              object_to_port(sc, car(x), port, not_p_display(use_write), ci);
+              x = cdr(x);
+            }
+          if (is_not_null(x))
+            {
+              if (plen < len)
+                port_write_string(port)(sc, " ...", 4, port);
+              else
+                {
+                  port_write_string(port)(sc, ". ", 2, port);
+                  object_to_port(sc, x, port, not_p_display(use_write), ci);
+                }}
+          port_write_character(port)(sc, ')', port);
+        }}
 }
 
 static s7_pointer find_closure(s7_scheme *sc, s7_pointer closure, s7_pointer current_let);
@@ -33909,55 +33909,55 @@ static void hash_table_procedures_to_port(s7_scheme *sc, s7_pointer hash, s7_poi
   if (typer[0] == '#') /* #f */
     {
       if (is_pair(hash_table_procedures(hash)))
-	{
-	  s7_int nlen = 0;
-	  const char *str = (const char *)integer_to_string(sc, hash_table_size(hash), &nlen);
-	  const char *checker = hash_table_typer_name(sc, hash_table_procedures_checker(hash));
-	  const char *mapper = hash_table_typer_name(sc, hash_table_procedures_mapper(hash));
-	  if (is_weak_hash_table(hash))
-	    port_write_string(port)(sc, "(make-weak-hash-table ", 22, port);
-	  else port_write_string(port)(sc, "(make-hash-table ", 17, port);
-	  port_write_string(port)(sc, str, nlen, port);
-	  if ((checker) && (mapper))
-	    {
-	      if ((is_boolean(hash_table_procedures_checker(hash))) && (is_boolean(hash_table_procedures_mapper(hash))))
-		port_write_string(port)(sc, " #f", 3, port); /* no checker/mapper set? */
-	      else
-		{
-		  port_write_string(port)(sc, " (cons ", 7, port);
-		  port_write_string(port)(sc, checker, safe_strlen(checker), port);
-		  port_write_character(port)(sc, ' ', port);
-		  port_write_string(port)(sc, mapper, safe_strlen(mapper), port);
-		  port_write_character(port)(sc, ')', port);
-		}}
-	  else
-	    if ((is_any_closure(hash_table_procedures_checker(hash))) ||
-		(is_any_closure(hash_table_procedures_mapper(hash))))
-	      {
-		port_write_string(port)(sc, " (cons ", 7, port);
-		if (is_any_closure(hash_table_procedures_checker(hash)))
-		  object_to_port_with_circle_check(sc, hash_table_procedures_checker(hash), port, P_READABLE, ci);
-		else port_write_string(port)(sc, checker, safe_strlen(checker), port);
-		port_write_character(port)(sc, ' ', port);
-		if (is_any_closure(hash_table_procedures_mapper(hash)))
-		  object_to_port_with_circle_check(sc, hash_table_procedures_mapper(hash), port, P_READABLE, ci);
-		else port_write_string(port)(sc, mapper, safe_strlen(mapper), port);
-		port_write_character(port)(sc, ')', port);
-	      }
-	    else port_write_string(port)(sc, " #f", 3, port); /* no checker/mapper set? */
-	  hash_typers_to_port(sc, hash, port);
-	}
+        {
+          s7_int nlen = 0;
+          const char *str = (const char *)integer_to_string(sc, hash_table_size(hash), &nlen);
+          const char *checker = hash_table_typer_name(sc, hash_table_procedures_checker(hash));
+          const char *mapper = hash_table_typer_name(sc, hash_table_procedures_mapper(hash));
+          if (is_weak_hash_table(hash))
+            port_write_string(port)(sc, "(make-weak-hash-table ", 22, port);
+          else port_write_string(port)(sc, "(make-hash-table ", 17, port);
+          port_write_string(port)(sc, str, nlen, port);
+          if ((checker) && (mapper))
+            {
+              if ((is_boolean(hash_table_procedures_checker(hash))) && (is_boolean(hash_table_procedures_mapper(hash))))
+                port_write_string(port)(sc, " #f", 3, port); /* no checker/mapper set? */
+              else
+                {
+                  port_write_string(port)(sc, " (cons ", 7, port);
+                  port_write_string(port)(sc, checker, safe_strlen(checker), port);
+                  port_write_character(port)(sc, ' ', port);
+                  port_write_string(port)(sc, mapper, safe_strlen(mapper), port);
+                  port_write_character(port)(sc, ')', port);
+                }}
+          else
+            if ((is_any_closure(hash_table_procedures_checker(hash))) ||
+                (is_any_closure(hash_table_procedures_mapper(hash))))
+              {
+                port_write_string(port)(sc, " (cons ", 7, port);
+                if (is_any_closure(hash_table_procedures_checker(hash)))
+                  object_to_port_with_circle_check(sc, hash_table_procedures_checker(hash), port, P_READABLE, ci);
+                else port_write_string(port)(sc, checker, safe_strlen(checker), port);
+                port_write_character(port)(sc, ' ', port);
+                if (is_any_closure(hash_table_procedures_mapper(hash)))
+                  object_to_port_with_circle_check(sc, hash_table_procedures_mapper(hash), port, P_READABLE, ci);
+                else port_write_string(port)(sc, mapper, safe_strlen(mapper), port);
+                port_write_character(port)(sc, ')', port);
+              }
+            else port_write_string(port)(sc, " #f", 3, port); /* no checker/mapper set? */
+          hash_typers_to_port(sc, hash, port);
+        }
       else
-	if (is_weak_hash_table(hash))
-	  port_write_string(port)(sc, "(weak-hash-table)", 17, port);
-	else port_write_string(port)(sc, "(hash-table)", 12, port);
+        if (is_weak_hash_table(hash))
+          port_write_string(port)(sc, "(weak-hash-table)", 17, port);
+        else port_write_string(port)(sc, "(hash-table)", 12, port);
     }
   else
     {
       s7_int nlen = 0;
       const char *str = integer_to_string(sc, hash_table_size(hash), &nlen);
       if (is_weak_hash_table(hash))
-	port_write_string(port)(sc, "(make-weak-hash-table ", 22, port);
+        port_write_string(port)(sc, "(make-weak-hash-table ", 22, port);
       else port_write_string(port)(sc, "(make-hash-table ", 17, port);
       port_write_string(port)(sc, str, nlen, port);
       port_write_character(port)(sc, ' ', port);
@@ -33978,13 +33978,13 @@ static void hash_table_to_port(s7_scheme *sc, s7_pointer hash, s7_pointer port,
   if (len == 0)
     {
       if (use_write == P_READABLE)
-	hash_table_procedures_to_port(sc, hash, port, true, ci);
+        hash_table_procedures_to_port(sc, hash, port, true, ci);
       else
-	{
-	  if (is_weak_hash_table(hash))
-	    port_write_string(port)(sc, "(weak-hash-table)", 17, port);
-	  else port_write_string(port)(sc, "(hash-table)", 12, port);
-	}
+        {
+          if (is_weak_hash_table(hash))
+            port_write_string(port)(sc, "(weak-hash-table)", 17, port);
+          else port_write_string(port)(sc, "(hash-table)", 12, port);
+        }
       return;
     }
 
@@ -33992,30 +33992,30 @@ static void hash_table_to_port(s7_scheme *sc, s7_pointer hash, s7_pointer port,
     {
       s7_int plen = sc->print_length;
       if (plen <= 0)
-	{
-	  port_write_string(port)(sc, "(hash-table ...)", 16, port);
-	  return;
-	}
+        {
+          port_write_string(port)(sc, "(hash-table ...)", 16, port);
+          return;
+        }
       if (len > plen)
-	{
-	  too_long = true;
-	  len = plen;
-	}}
+        {
+          too_long = true;
+          len = plen;
+        }}
 
   if ((use_write == P_READABLE) &&
       (ci))
     {
       href = peek_shared_ref(ci, hash);
       if (href != 0)
-	{
-	  if (href < 0) href = -href;
-	  if ((ci->defined[href]) || (port == ci->cycle_port))
-	    {
-	      char buf[128];
-	      int32_t plen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	      return;
-	    }}}
+        {
+          if (href < 0) href = -href;
+          if ((ci->defined[href]) || (port == ci->cycle_port))
+            {
+              char buf[128];
+              int32_t plen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+              return;
+            }}}
 
   iterator = s7_make_iterator(sc, hash);
   gc_iter = gc_protect_1(sc, iterator);
@@ -34027,117 +34027,117 @@ static void hash_table_to_port(s7_scheme *sc, s7_pointer hash, s7_pointer port,
   if (use_write == P_READABLE)
     {
       if ((is_typed_hash_table(hash)) || (is_pair(hash_table_procedures(hash))) || (hash_chosen(hash)))
-	{
-	  port_write_string(port)(sc, "(let ((<h> ", 11, port);
-	  letd = true;
-	}
+        {
+          port_write_string(port)(sc, "(let ((<h> ", 11, port);
+          letd = true;
+        }
       else
-	if ((is_immutable_hash_table(hash)) && (!hash_cyclic))
-	  {
-	    port_write_string(port)(sc, "(immutable! ", 12, port);
-	    immut = true;
-	  }}
+        if ((is_immutable_hash_table(hash)) && (!hash_cyclic))
+          {
+            port_write_string(port)(sc, "(immutable! ", 12, port);
+            immut = true;
+          }}
 
   if ((use_write == P_READABLE) &&
       (hash_cyclic))
     {
       if (href < 0) href = -href;
       if ((!is_typed_hash_table(hash)) && (!is_pair(hash_table_procedures(hash))) && (!hash_chosen(hash)))
-	{
-	  if (is_weak_hash_table(hash))
-	    port_write_string(port)(sc, "(weak-hash-table", 16, port);
-	  else port_write_string(port)(sc, "(hash-table", 11, port); /* top level let */
-	}
+        {
+          if (is_weak_hash_table(hash))
+            port_write_string(port)(sc, "(weak-hash-table", 16, port);
+          else port_write_string(port)(sc, "(hash-table", 11, port); /* top level let */
+        }
       else
-	{
-	  hash_table_procedures_to_port(sc, hash, port, true, ci);
-	  port_write_character(port)(sc, ')', port);
-	}
+        {
+          hash_table_procedures_to_port(sc, hash, port, true, ci);
+          port_write_character(port)(sc, ')', port);
+        }
 
       /* output here is deferred via ci->cycle_port until later in cyclic_out */
       for (s7_int i = 0; i < len; i++)
-	{
-	  s7_pointer key_val = hash_table_iterate(sc, iterator);
-	  s7_pointer key = car(key_val);
-	  s7_pointer val = cdr(key_val);
-	  char buf[128];
-	  int32_t eref = peek_shared_ref(ci, val);
-	  int32_t kref = peek_shared_ref(ci, key);
-	  int32_t plen = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, href), "> ", (const char *)NULL);
-	  port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
-	  if (kref != 0)
-	    {
-	      if (kref < 0) kref = -kref;
-	      plen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, kref), ">", (const char *)NULL);
-	      port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
-	    }
-	  else object_to_port(sc, key, ci->cycle_port, P_READABLE, ci);
-	  if (eref != 0)
-	    {
-	      if (eref < 0) eref = -eref;
-	      plen = catstrs_direct(buf, ") <", pos_int_to_str_direct(sc, eref), ">) ", (const char *)NULL);
-	      port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
-	    }
-	  else
-	    {
-	      port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
-	      object_to_port_with_circle_check(sc, val, ci->cycle_port, P_READABLE, ci);
-	      port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
-	    }}}
+        {
+          s7_pointer key_val = hash_table_iterate(sc, iterator);
+          s7_pointer key = car(key_val);
+          s7_pointer val = cdr(key_val);
+          char buf[128];
+          int32_t eref = peek_shared_ref(ci, val);
+          int32_t kref = peek_shared_ref(ci, key);
+          int32_t plen = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, href), "> ", (const char *)NULL);
+          port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
+          if (kref != 0)
+            {
+              if (kref < 0) kref = -kref;
+              plen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, kref), ">", (const char *)NULL);
+              port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
+            }
+          else object_to_port(sc, key, ci->cycle_port, P_READABLE, ci);
+          if (eref != 0)
+            {
+              if (eref < 0) eref = -eref;
+              plen = catstrs_direct(buf, ") <", pos_int_to_str_direct(sc, eref), ">) ", (const char *)NULL);
+              port_write_string(ci->cycle_port)(sc, buf, plen, ci->cycle_port);
+            }
+          else
+            {
+              port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
+              object_to_port_with_circle_check(sc, val, ci->cycle_port, P_READABLE, ci);
+              port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
+            }}}
   else
     {
       if (((!is_typed_hash_table(hash)) && (!is_pair(hash_table_procedures(hash))) && (!hash_chosen(hash))) || (use_write != P_READABLE))
-	{
-	  if (is_weak_hash_table(hash))
-	    port_write_string(port)(sc, "(weak-hash-table", 16, port);
-	  else port_write_string(port)(sc, "(hash-table", 11, port);
-	}
+        {
+          if (is_weak_hash_table(hash))
+            port_write_string(port)(sc, "(weak-hash-table", 16, port);
+          else port_write_string(port)(sc, "(hash-table", 11, port);
+        }
       else
-	{
-	  hash_table_procedures_to_port(sc, hash, port, true, ci);
-	  port_write_character(port)(sc, ')', port);
-	  port_write_string(port)(sc, ") (copy (hash-table", 19, port);
-	  copied = true;
-	}
+        {
+          hash_table_procedures_to_port(sc, hash, port, true, ci);
+          port_write_character(port)(sc, ')', port);
+          port_write_string(port)(sc, ") (copy (hash-table", 19, port);
+          copied = true;
+        }
       for (s7_int i = 0; i < len; i++)
-	{
-	  s7_pointer key_val = hash_table_iterate(sc, iterator);
-	  port_write_character(port)(sc, ' ', port);
-	  if ((use_write != P_READABLE) && (use_write != P_CODE) && (is_normal_symbol(car(key_val))))
-	    port_write_character(port)(sc, '\'', port);
-	  object_to_port_with_circle_check(sc, car(key_val), port, not_p_display(use_write), ci);
-	  port_write_character(port)(sc, ' ', port);
-	  object_to_port_with_circle_check(sc, cdr(key_val), port, not_p_display(use_write), ci);
-	}
+        {
+          s7_pointer key_val = hash_table_iterate(sc, iterator);
+          port_write_character(port)(sc, ' ', port);
+          if ((use_write != P_READABLE) && (use_write != P_CODE) && (is_normal_symbol(car(key_val))))
+            port_write_character(port)(sc, '\'', port);
+          object_to_port_with_circle_check(sc, car(key_val), port, not_p_display(use_write), ci);
+          port_write_character(port)(sc, ' ', port);
+          object_to_port_with_circle_check(sc, cdr(key_val), port, not_p_display(use_write), ci);
+        }
       if (use_write != P_READABLE)
-	{
-	  if (too_long)
-	    port_write_string(port)(sc, " ...)", 5, port);
-	  else port_write_character(port)(sc, ')', port);
-	}}
+        {
+          if (too_long)
+            port_write_string(port)(sc, " ...)", 5, port);
+          else port_write_character(port)(sc, ')', port);
+        }}
 
   if (use_write == P_READABLE)
     {
       if (copied)
-	{
-	  if (!letd)
-	    {
-	      char buf[128];
-	      int32_t plen = catstrs_direct(buf, ") <", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
-	      port_write_string(port)(sc, buf, plen, port);
-	    }
-	  else port_write_string(port)(sc, ") <h>))", 7, port);
-	}
+        {
+          if (!letd)
+            {
+              char buf[128];
+              int32_t plen = catstrs_direct(buf, ") <", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
+              port_write_string(port)(sc, buf, plen, port);
+            }
+          else port_write_string(port)(sc, ") <h>))", 7, port);
+        }
       else
-	if (letd)
-	  port_write_string(port)(sc, ") <h>)", 6, port);
-	else port_write_character(port)(sc, ')', port);
+        if (letd)
+          port_write_string(port)(sc, ") <h>)", 6, port);
+        else port_write_character(port)(sc, ')', port);
 
       if ((is_immutable_hash_table(hash)) && (!hash_cyclic) && (!is_typed_hash_table(hash)))
-	port_write_character(port)(sc, ')', port);
+        port_write_character(port)(sc, ')', port);
 
       if ((!immut) && (is_immutable_hash_table(hash)) && (!hash_cyclic))
-	port_write_string(port)(sc, ") (immutable! <h>))", 19, port);
+        port_write_string(port)(sc, ") (immutable! <h>))", 19, port);
     }
   s7_gc_unprotect_at(sc, gc_iter);
   iterator_current(iterator) = sc->nil;
@@ -34150,14 +34150,14 @@ static void slot_list_to_port(s7_scheme *sc, s7_pointer slot, s7_pointer port, s
   for (; tis_slot(slot); slot = next_slot(slot))
     {
       if (bindings)
-	{
-	  if (first_time)
-	    {
-	      port_write_character(port)(sc, '(', port);
-	      first_time = false;
-	    }
-	  else port_write_string(port)(sc, " (", 2, port);
-	}
+        {
+          if (first_time)
+            {
+              port_write_character(port)(sc, '(', port);
+              first_time = false;
+            }
+          else port_write_string(port)(sc, " (", 2, port);
+        }
       else port_write_character(port)(sc, ' ', port);
       symbol_to_port(sc, slot_symbol(slot), port, (bindings) ? P_DISPLAY : P_KEY, NULL);  /* (object->string (inlet (symbol "(\")") 1) :readable) */
       port_write_character(port)(sc, ' ', port);
@@ -34173,50 +34173,50 @@ static void slot_list_to_port_with_cycle(s7_scheme *sc, s7_pointer obj, s7_point
     {
       s7_pointer sym = slot_symbol(slot), val = slot_value(slot);
       if (bindings)
-	{
-	  if (first_time)
-	    {
-	      port_write_character(port)(sc, '(', port);
-	      first_time = false;
-	    }
-	  else port_write_string(port)(sc, " (", 2, port);
-	}
+        {
+          if (first_time)
+            {
+              port_write_character(port)(sc, '(', port);
+              first_time = false;
+            }
+          else port_write_string(port)(sc, " (", 2, port);
+        }
       else port_write_character(port)(sc, ' ', port);
       symbol_to_port(sc, sym, port, (bindings) ? P_DISPLAY : P_KEY, NULL);
       if (has_structure(val))
-	{
-	  char buf[128];
-	  int32_t symref;
-	  int32_t len = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, -peek_shared_ref(ci, obj)), "> ", (const char *)NULL);
-	  port_write_string(port)(sc, " #f", 3, port);
-	  port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
-	  symbol_to_port(sc, sym, ci->cycle_port, P_KEY, NULL);
-
-	  symref = peek_shared_ref(ci, val);
-	  if (symref != 0)
-	    {
-	      if (symref < 0) symref = -symref;
-	      len = catstrs_direct(buf, ") <", pos_int_to_str_direct(sc, symref), ">) ", (const char *)NULL);
-	      port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
-	    }
-	  else
-	    {
-	      port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
-	      object_to_port_with_circle_check(sc, val, ci->cycle_port, P_READABLE, ci);
-	      port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
-	    }}
+        {
+          char buf[128];
+          int32_t symref;
+          int32_t len = catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, -peek_shared_ref(ci, obj)), "> ", (const char *)NULL);
+          port_write_string(port)(sc, " #f", 3, port);
+          port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
+          symbol_to_port(sc, sym, ci->cycle_port, P_KEY, NULL);
+
+          symref = peek_shared_ref(ci, val);
+          if (symref != 0)
+            {
+              if (symref < 0) symref = -symref;
+              len = catstrs_direct(buf, ") <", pos_int_to_str_direct(sc, symref), ">) ", (const char *)NULL);
+              port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
+            }
+          else
+            {
+              port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
+              object_to_port_with_circle_check(sc, val, ci->cycle_port, P_READABLE, ci);
+              port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
+            }}
       else
-	{
-	  port_write_character(port)(sc, ' ', port);
-	  object_to_port_with_circle_check(sc, val, port, P_READABLE, ci);
-	}
+        {
+          port_write_character(port)(sc, ' ', port);
+          object_to_port_with_circle_check(sc, val, port, P_READABLE, ci);
+        }
       if (bindings) port_write_character(port)(sc, ')', port);
       if (is_immutable(obj))
-	{
-	  char buf[128];
-	  int32_t len = catstrs_direct(buf, "  (immutable! <", pos_int_to_str_direct(sc, -peek_shared_ref(ci, obj)), ">) ", (const char *)NULL);
-	  port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
-	}}
+        {
+          char buf[128];
+          int32_t len = catstrs_direct(buf, "  (immutable! <", pos_int_to_str_direct(sc, -peek_shared_ref(ci, obj)), ">) ", (const char *)NULL);
+          port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
+        }}
 }
 
 static bool let_has_setter(s7_pointer obj)
@@ -34233,12 +34233,12 @@ static bool slot_setters_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port,
   for (s7_pointer slot = let_slots(obj); tis_slot(slot); slot = next_slot(slot))
     if (slot_has_setter(slot))
       {
-	if (spaced_out) port_write_character(port)(sc, ' ', port); else spaced_out = true;
-	port_write_string(port)(sc, "(set! (setter '", 15, port);
-	symbol_to_port(sc, slot_symbol(slot), port, P_DISPLAY, NULL);
-	port_write_string(port)(sc, ") ", 2, port);
-	object_to_port_with_circle_check(sc, slot_setter(slot), port, P_READABLE, ci);
-	port_write_character(port)(sc, ')', port);
+        if (spaced_out) port_write_character(port)(sc, ' ', port); else spaced_out = true;
+        port_write_string(port)(sc, "(set! (setter '", 15, port);
+        symbol_to_port(sc, slot_symbol(slot), port, P_DISPLAY, NULL);
+        port_write_string(port)(sc, ") ", 2, port);
+        object_to_port_with_circle_check(sc, slot_setter(slot), port, P_READABLE, ci);
+        port_write_character(port)(sc, ')', port);
       }
   return(spaced_out);
 }
@@ -34248,10 +34248,10 @@ static void immutable_slots_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer po
   for (s7_pointer slot = let_slots(obj); tis_slot(slot); slot = next_slot(slot))
     if (is_immutable_slot(slot))
       {
-	if (spaced_out) port_write_character(port)(sc, ' ', port); else spaced_out = true;
-	port_write_string(port)(sc, "(immutable! '", 13, port);
-	symbol_to_port(sc, slot_symbol(slot), port, P_DISPLAY, NULL);
-	port_write_character(port)(sc, ')', port);
+        if (spaced_out) port_write_character(port)(sc, ' ', port); else spaced_out = true;
+        port_write_string(port)(sc, "(immutable! '", 13, port);
+        symbol_to_port(sc, slot_symbol(slot), port, P_DISPLAY, NULL);
+        port_write_character(port)(sc, ')', port);
       }
 }
 
@@ -34280,21 +34280,21 @@ static void let_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_writ
     {
       s7_pointer print_func = find_method(sc, obj, sc->object_to_string_symbol);
       if (print_func != sc->undefined)
-	{
-	  s7_pointer p;
-	  /* what needs to be protected here? for one, the function might not return a string! */
-
-	  clear_has_methods(obj);
-	  if ((use_write == P_WRITE) || (use_write == P_CODE))
-	    p = s7_apply_function(sc, print_func, set_plist_1(sc, obj));
-	  else p = s7_apply_function(sc, print_func, set_plist_2(sc, obj, (use_write == P_DISPLAY) ? sc->F : sc->readable_keyword));
-	  set_has_methods(obj);
-
-	  if ((is_string(p)) &&
-	      (string_length(p) > 0))
-	    port_write_string(port)(sc, string_value(p), string_length(p), port);
-	  return;
-	}}
+        {
+          s7_pointer p;
+          /* what needs to be protected here? for one, the function might not return a string! */
+
+          clear_has_methods(obj);
+          if ((use_write == P_WRITE) || (use_write == P_CODE))
+            p = s7_apply_function(sc, print_func, set_plist_1(sc, obj));
+          else p = s7_apply_function(sc, print_func, set_plist_2(sc, obj, (use_write == P_DISPLAY) ? sc->F : sc->readable_keyword));
+          set_has_methods(obj);
+
+          if ((is_string(p)) &&
+              (string_length(p) > 0))
+            port_write_string(port)(sc, string_value(p), string_length(p), port);
+          return;
+        }}
   if (obj == sc->rootlet)    {port_write_string(port)(sc, "(rootlet)", 9, port); return;}
   if (obj == sc->s7_starlet) {port_write_string(port)(sc, "*s7*", 4, port);      return;}
   if (is_unlet(obj))         {port_write_string(port)(sc, "(unlet)", 7, port);   return;}
@@ -34308,104 +34308,104 @@ static void let_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_writ
     {
       int32_t lref;
       if ((ci) &&
-	  (is_cyclic(obj)) &&
-	  ((lref = peek_shared_ref(ci, obj)) != 0))
-	{
-	  if (lref < 0) lref = -lref;
-	  if ((ci->defined[lref]) || (port == ci->cycle_port))
-	    {
-	      char buf[128];
-	      int32_t len = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, lref), ">", (const char *)NULL);
-	      port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
-	      return;
-	    }
-	  if (let_outlet(obj) != sc->rootlet)
-	    {
-	      char buf[128];
-	      int32_t len = (int32_t)catstrs_direct(buf, "  (set! (outlet <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
-	      port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
-	      let_to_port(sc, let_outlet(obj), ci->cycle_port, use_write, ci);
-	      port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
-	    }
-	  if (is_openlet(obj))
-	    port_write_string(port)(sc, "(openlet ", 9, port);
-	  /* not immutable here because we'll need to set the let fields below, then declare it immutable */
-	  if (let_has_setter(obj))           /* both explicit setters and immutable slots */
-	    {
-	      port_write_string(port)(sc, "(let (", 6, port);
-	      slot_list_to_port_with_cycle(sc, obj, let_slots(obj), port, ci, true);
-	      port_write_string(port)(sc, ") ", 2, port);
-	      immutable_slots_to_port(sc, obj, port, slot_setters_to_port(sc, obj, port, ci));
-	      port_write_string(port)(sc, " (curlet))", 10, port);
-	    }
-	  else
-	    {
-	      port_write_string(port)(sc, "(inlet", 6, port);
-	      slot_list_to_port_with_cycle(sc, obj, let_slots(obj), port, ci, false);
-	      port_write_character(port)(sc, ')', port);
-	    }
-	  if (is_openlet(obj))
-	    port_write_character(port)(sc, ')', port);
-	}
+          (is_cyclic(obj)) &&
+          ((lref = peek_shared_ref(ci, obj)) != 0))
+        {
+          if (lref < 0) lref = -lref;
+          if ((ci->defined[lref]) || (port == ci->cycle_port))
+            {
+              char buf[128];
+              int32_t len = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, lref), ">", (const char *)NULL);
+              port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
+              return;
+            }
+          if (let_outlet(obj) != sc->rootlet)
+            {
+              char buf[128];
+              int32_t len = (int32_t)catstrs_direct(buf, "  (set! (outlet <", pos_int_to_str_direct(sc, lref), ">) ", (const char *)NULL);
+              port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
+              let_to_port(sc, let_outlet(obj), ci->cycle_port, use_write, ci);
+              port_write_string(ci->cycle_port)(sc, ") ", 2, ci->cycle_port);
+            }
+          if (is_openlet(obj))
+            port_write_string(port)(sc, "(openlet ", 9, port);
+          /* not immutable here because we'll need to set the let fields below, then declare it immutable */
+          if (let_has_setter(obj))           /* both explicit setters and immutable slots */
+            {
+              port_write_string(port)(sc, "(let (", 6, port);
+              slot_list_to_port_with_cycle(sc, obj, let_slots(obj), port, ci, true);
+              port_write_string(port)(sc, ") ", 2, port);
+              immutable_slots_to_port(sc, obj, port, slot_setters_to_port(sc, obj, port, ci));
+              port_write_string(port)(sc, " (curlet))", 10, port);
+            }
+          else
+            {
+              port_write_string(port)(sc, "(inlet", 6, port);
+              slot_list_to_port_with_cycle(sc, obj, let_slots(obj), port, ci, false);
+              port_write_character(port)(sc, ')', port);
+            }
+          if (is_openlet(obj))
+            port_write_character(port)(sc, ')', port);
+        }
       else
-	{
-	  if (is_openlet(obj))
-	    port_write_string(port)(sc, "(openlet ", 9, port);
-	  if (is_immutable_let(obj))
-	    port_write_string(port)(sc, "(immutable! ", 12, port);
-
-	  /* this ignores outlet -- but is that a problem? */
-	  /* (object->string (let ((i 0)) (set! (setter 'i) integer?) (curlet)) :readable) -> "(let ((i 0)) (set! (setter 'i) #_integer?) (curlet))" */
-	  if (let_has_setter(obj))
-	    {
-	      port_write_string(port)(sc, "(let (", 6, port);
-	      slot_list_to_port(sc, let_slots(obj), port, ci, true);
-	      port_write_string(port)(sc, ") ", 2, port);
-	      immutable_slots_to_port(sc, obj, port, slot_setters_to_port(sc, obj, port, ci));
-	      /* perhaps set outlet here?? */
-	      port_write_string(port)(sc, " (curlet))", 10, port);
-	    }
-	  else
-	    {
-	      if (let_outlet(obj) != sc->rootlet)
-		{
-		  int32_t ref;
-		  port_write_string(port)(sc, "(sublet ", 8, port);
-		  if ((ci) && ((ref = peek_shared_ref(ci, let_outlet(obj))) < 0))
-		    {
-		      char buf[128];
-		      int32_t len = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, -ref), ">", (const char *)NULL);
-		      port_write_string(port)(sc, buf, len, port);
-		    }
-		  else
-		    {
-		      s7_pointer name = let_ref_p_pp(sc, obj, sc->class_name_symbol);
-		      if (is_symbol(name))
-			symbol_to_port(sc, name, port, P_DISPLAY, NULL);
-		      else let_to_port(sc, let_outlet(obj), port, use_write, ci);
-		    }}
-	      else port_write_string(port)(sc, "(inlet", 6, port);
-	      slot_list_to_port(sc, let_slots(obj), port, ci, false);
-	      port_write_character(port)(sc, ')', port);
-	    }
-	  if (is_immutable_let(obj))
-	    port_write_character(port)(sc, ')', port);
-	  if (is_openlet(obj))
-	    port_write_character(port)(sc, ')', port);
-	}}
+        {
+          if (is_openlet(obj))
+            port_write_string(port)(sc, "(openlet ", 9, port);
+          if (is_immutable_let(obj))
+            port_write_string(port)(sc, "(immutable! ", 12, port);
+
+          /* this ignores outlet -- but is that a problem? */
+          /* (object->string (let ((i 0)) (set! (setter 'i) integer?) (curlet)) :readable) -> "(let ((i 0)) (set! (setter 'i) #_integer?) (curlet))" */
+          if (let_has_setter(obj))
+            {
+              port_write_string(port)(sc, "(let (", 6, port);
+              slot_list_to_port(sc, let_slots(obj), port, ci, true);
+              port_write_string(port)(sc, ") ", 2, port);
+              immutable_slots_to_port(sc, obj, port, slot_setters_to_port(sc, obj, port, ci));
+              /* perhaps set outlet here?? */
+              port_write_string(port)(sc, " (curlet))", 10, port);
+            }
+          else
+            {
+              if (let_outlet(obj) != sc->rootlet)
+                {
+                  int32_t ref;
+                  port_write_string(port)(sc, "(sublet ", 8, port);
+                  if ((ci) && ((ref = peek_shared_ref(ci, let_outlet(obj))) < 0))
+                    {
+                      char buf[128];
+                      int32_t len = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, -ref), ">", (const char *)NULL);
+                      port_write_string(port)(sc, buf, len, port);
+                    }
+                  else
+                    {
+                      s7_pointer name = let_ref_p_pp(sc, obj, sc->class_name_symbol);
+                      if (is_symbol(name))
+                        symbol_to_port(sc, name, port, P_DISPLAY, NULL);
+                      else let_to_port(sc, let_outlet(obj), port, use_write, ci);
+                    }}
+              else port_write_string(port)(sc, "(inlet", 6, port);
+              slot_list_to_port(sc, let_slots(obj), port, ci, false);
+              port_write_character(port)(sc, ')', port);
+            }
+          if (is_immutable_let(obj))
+            port_write_character(port)(sc, ')', port);
+          if (is_openlet(obj))
+            port_write_character(port)(sc, ')', port);
+        }}
   else /* not readable write */
     {
       s7_pointer slot = let_slots(obj);
       port_write_string(port)(sc, "(inlet", 6, port);
       for (int32_t i = 1; tis_slot(slot); i++, slot = next_slot(slot))
-	{
-	  port_write_character(port)(sc, ' ', port);
-	  slot_to_port(sc, slot, port, use_write, ci);
-	  if ((tis_slot(next_slot(slot))) && (i == sc->print_length))
-	    {
-	      port_write_string(port)(sc, " ...", 4, port);
-	      break;
-	    }}
+        {
+          port_write_character(port)(sc, ' ', port);
+          slot_to_port(sc, slot, port, use_write, ci);
+          if ((tis_slot(next_slot(slot))) && (i == sc->print_length))
+            {
+              port_write_string(port)(sc, " ...", 4, port);
+              break;
+            }}
       port_write_character(port)(sc, ')', port);
     }
 }
@@ -34428,19 +34428,19 @@ static void write_macro_readably(s7_scheme *sc, s7_pointer obj, s7_pointer port)
   else
     if (is_pair(arglist))
       {
-	port_write_string(port)(sc, " (", 2, port);
-	for (expr = arglist; is_pair(expr); expr = cdr(expr))
-	  {
-	    object_to_port(sc, car(expr), port, P_WRITE, NULL);
-	    if (is_pair(cdr(expr)))
-	      port_write_character(port)(sc, ' ', port);
-	  }
-	if (!is_null(expr))
-	  {
-	    port_write_string(port)(sc, " . ", 3, port);
-	    object_to_port(sc, expr, port, P_WRITE, NULL);
-	  }
-	port_write_string(port)(sc, ") ", 2, port);
+        port_write_string(port)(sc, " (", 2, port);
+        for (expr = arglist; is_pair(expr); expr = cdr(expr))
+          {
+            object_to_port(sc, car(expr), port, P_WRITE, NULL);
+            if (is_pair(cdr(expr)))
+              port_write_character(port)(sc, ' ', port);
+          }
+        if (!is_null(expr))
+          {
+            port_write_string(port)(sc, " . ", 3, port);
+            object_to_port(sc, expr, port, P_WRITE, NULL);
+          }
+        port_write_string(port)(sc, ") ", 2, port);
       }
     else port_write_string(port)(sc, " () ", 4, port);
 
@@ -34455,7 +34455,7 @@ static s7_pointer match_symbol(const s7_pointer symbol, s7_pointer e)
   for (s7_pointer le = e; le; le = let_outlet(le))
     for (s7_pointer y = let_slots(le); tis_slot(y); y = next_slot(y))
       if (slot_symbol(y) == symbol)
-	return(y);
+        return(y);
   return(NULL);
 }
 
@@ -34471,8 +34471,8 @@ static bool arg_memq(const s7_pointer symbol, s7_pointer args)
 {
   for (s7_pointer x = args; is_pair(x); x = cdr(x))
     if ((car(x) == symbol) ||
-	((is_pair(car(x))) &&
-	 (caar(x) == symbol)))
+        ((is_pair(car(x))) &&
+         (caar(x) == symbol)))
       return(true);
   return(false);
 }
@@ -34484,7 +34484,7 @@ static void collect_symbol(s7_scheme *sc, s7_pointer sym, s7_pointer e, s7_point
     {
       s7_pointer slot = match_symbol(sym, e);
       if (slot)
-	gc_protected_at(sc, gc_loc) = cons(sc, slot, gc_protected_at(sc, gc_loc));
+        gc_protected_at(sc, gc_loc) = cons(sc, slot, gc_protected_at(sc, gc_loc));
     }
 }
 
@@ -34513,15 +34513,15 @@ static s7_pointer find_closure(s7_scheme *sc, s7_pointer closure, s7_pointer cur
   for (s7_pointer e = current_let; e; e = let_outlet(e))
     {
       if ((is_funclet(e)) || (is_maclet(e)))
-	{
-	  s7_pointer sym = funclet_function(e);
-	  const s7_pointer f = s7_symbol_local_value(sc, sym, e);
-	  if (f == closure)
-	    return(sym);
-	}
+        {
+          s7_pointer sym = funclet_function(e);
+          const s7_pointer f = s7_symbol_local_value(sc, sym, e);
+          if (f == closure)
+            return(sym);
+        }
       for (s7_pointer y = let_slots(e); tis_slot(y); y = next_slot(y))
-	if (slot_value(y) == closure)
-	  return(slot_symbol(y));
+        if (slot_value(y) == closure)
+          return(slot_symbol(y));
     }
   if ((is_any_macro(closure)) && /* can't be a c_macro here */
       (has_pair_macro(closure))) /* maybe macro never called, so no maclet exists */
@@ -34546,13 +34546,13 @@ static void write_closure_name(s7_scheme *sc, s7_pointer closure, s7_pointer por
 
     case T_MACRO:
       if (is_expansion(closure))
-	port_write_string(port)(sc, "#<expansion ", 12, port);
+        port_write_string(port)(sc, "#<expansion ", 12, port);
       else port_write_string(port)(sc, "#<macro ", 8, port);
       break;
 
     case T_MACRO_STAR:
       if (is_expansion(closure))
-	port_write_string(port)(sc, "#<expansion* ", 13, port);
+        port_write_string(port)(sc, "#<expansion* ", 13, port);
       else port_write_string(port)(sc, "#<macro* ", 9, port);
       break;
     }
@@ -34563,45 +34563,45 @@ static void write_closure_name(s7_scheme *sc, s7_pointer closure, s7_pointer por
     {
       s7_pointer args = closure_args(closure);
       if (is_symbol(args))
-	{
-	  port_write_string(port)(sc, symbol_name(args), symbol_name_length(args), port);
-	  port_write_character(port)(sc, '>', port);    /* (lambda a a) -> #<lambda a> */
-	}
+        {
+          port_write_string(port)(sc, symbol_name(args), symbol_name_length(args), port);
+          port_write_character(port)(sc, '>', port);    /* (lambda a a) -> #<lambda a> */
+        }
       else
-	{
-	  port_write_character(port)(sc, '(', port);
-	  x = car(args);
-	  if (is_pair(x)) x = car(x);
-	  port_write_string(port)(sc, symbol_name(x), symbol_name_length(x), port);
-	  if (!is_null(cdr(args)))
-	    {
-	      s7_pointer y;
-	      port_write_character(port)(sc, ' ', port);
-	      if (is_pair(cdr(args)))
-		{
-		  y = cadr(args);
-		  if (is_pair(y))
-		    y = car(y);
-		  else
-		    if (y == sc->rest_keyword)
-		      {
-			port_write_string(port)(sc, ":rest ", 6, port);
-			args = cdr(args);
-			y = cadr(args);
-			if (is_pair(y)) y = car(y);
-		      }}
-	      else
-		{
-		  port_write_string(port)(sc, ". ", 2, port);
-		  y = cdr(args);
-		}
-	      port_write_string(port)(sc, symbol_name(y), symbol_name_length(y), port);
-	      if ((is_pair(cdr(args))) &&
-		  (!is_null(cddr(args))))
-		port_write_string(port)(sc, " ...", 4, port);
-	    }
-	  port_write_string(port)(sc, ")>", 2, port);
-	}}
+        {
+          port_write_character(port)(sc, '(', port);
+          x = car(args);
+          if (is_pair(x)) x = car(x);
+          port_write_string(port)(sc, symbol_name(x), symbol_name_length(x), port);
+          if (!is_null(cdr(args)))
+            {
+              s7_pointer y;
+              port_write_character(port)(sc, ' ', port);
+              if (is_pair(cdr(args)))
+                {
+                  y = cadr(args);
+                  if (is_pair(y))
+                    y = car(y);
+                  else
+                    if (y == sc->rest_keyword)
+                      {
+                        port_write_string(port)(sc, ":rest ", 6, port);
+                        args = cdr(args);
+                        y = cadr(args);
+                        if (is_pair(y)) y = car(y);
+                      }}
+              else
+                {
+                  port_write_string(port)(sc, ". ", 2, port);
+                  y = cdr(args);
+                }
+              port_write_string(port)(sc, symbol_name(y), symbol_name_length(y), port);
+              if ((is_pair(cdr(args))) &&
+                  (!is_null(cddr(args))))
+                port_write_string(port)(sc, " ...", 4, port);
+            }
+          port_write_string(port)(sc, ")>", 2, port);
+        }}
 }
 
 static s7_pointer closure_name(s7_scheme *sc, s7_pointer closure)
@@ -34627,7 +34627,7 @@ static s7_pointer pair_append(s7_scheme *sc, s7_pointer a, s7_pointer b)
       tp = list_1(sc, car(a));
       set_stack_protected2(sc, tp);
       for (np = tp; is_pair(p); p = cdr(p), np = cdr(np))
-	set_cdr(np, list_1(sc, car(p)));
+        set_cdr(np, list_1(sc, car(p)));
       set_cdr(np, b);
     }
   unstack_gc_protect(sc);
@@ -34646,8 +34646,8 @@ static void write_closure_readably_1(s7_scheme *sc, s7_pointer obj, s7_pointer a
       (allows_other_keys(arglist)))
     {
       sc->temp9 = (is_null(cdr(arglist))) ? set_plist_2(sc, car(arglist), sc->allow_other_keys_keyword) :
-	          ((is_null(cddr(arglist))) ? set_plist_3(sc, car(arglist), cadr(arglist), sc->allow_other_keys_keyword) :
-	                                      pair_append(sc, arglist, list_1(sc, sc->allow_other_keys_keyword)));
+                  ((is_null(cddr(arglist))) ? set_plist_3(sc, car(arglist), cadr(arglist), sc->allow_other_keys_keyword) :
+                                              pair_append(sc, arglist, list_1(sc, sc->allow_other_keys_keyword)));
       object_to_port(sc, sc->temp9, port, P_WRITE, NULL);
       sc->temp9 = sc->unused;
     }
@@ -34674,22 +34674,22 @@ static void write_closure_readably(s7_scheme *sc, s7_pointer obj, s7_pointer por
   if (sc->safety > NO_SAFETY)
     {
       if (tree_is_cyclic(sc, body))
-	{
-	  port_write_string(port)(sc, "#<write_closure_readably: body is cyclic>", 41, port); /* not s7_error here! */
-	  return;
-	}
+        {
+          port_write_string(port)(sc, "#<write_closure_readably: body is cyclic>", 41, port); /* not s7_error here! */
+          return;
+        }
       if ((!ci) && (is_pair(arglist)))
-	{ /* (format #f "~W" (make-hook (let ((cp (list 1))) (set-cdr! cp cp) (list 'quote cp)))) */
-	  shared_info_t *new_ci = make_shared_info(sc);
-	  clear_shared_info(new_ci);
-	  if (collect_shared_info(sc, new_ci, arglist, false))
-	    {
-	      free_shared_info(new_ci);
-	      port_write_string(port)(sc, "#<write_closure_readably: arglist is cyclic>", 44, port); /* not s7_error here! */
-	      return;
-	    }
-	  free_shared_info(new_ci);
-	}}
+        { /* (format #f "~W" (make-hook (let ((cp (list 1))) (set-cdr! cp cp) (list 'quote cp)))) */
+          shared_info_t *new_ci = make_shared_info(sc);
+          clear_shared_info(new_ci);
+          if (collect_shared_info(sc, new_ci, arglist, false))
+            {
+              free_shared_info(new_ci);
+              port_write_string(port)(sc, "#<write_closure_readably: arglist is cyclic>", 44, port); /* not s7_error here! */
+              return;
+            }
+          free_shared_info(new_ci);
+        }}
   if (is_symbol(arglist)) arglist = set_dlist_1(sc, arglist);
   pe = closure_let(obj);
 
@@ -34701,11 +34701,11 @@ static void write_closure_readably(s7_scheme *sc, s7_pointer obj, s7_pointer por
     {
       setter = closure_setter(obj);
       if (has_closure_let(setter))                 /* collect args etc so need the arglist */
-	{
-	  arglist = closure_args(setter);
-	  if (is_symbol(arglist)) arglist = set_dlist_1(sc, arglist);
-	  collect_locals(sc, closure_body(setter), pe, arglist, gc_loc);
-	}}
+        {
+          arglist = closure_args(setter);
+          if (is_symbol(arglist)) arglist = set_dlist_1(sc, arglist);
+          collect_locals(sc, closure_body(setter), pe, arglist, gc_loc);
+        }}
 
   local_slots = T_Lst(gc_protected_at(sc, gc_loc)); /* possibly a list of slots */
   if (!is_null(local_slots))
@@ -34713,26 +34713,26 @@ static void write_closure_readably(s7_scheme *sc, s7_pointer obj, s7_pointer por
       /* if (let|letrec ((f (lambda () f))) (object->string f :readable)), local_slots: ('f f) */
       /* but we can't handle it below because that leads to an infinite loop */
       for (s7_pointer x = local_slots; is_pair(x); x = cdr(x))
-	{
-	  s7_pointer slot = car(x);
-	  if ((!is_any_closure(slot_value(slot))) &&    /* mutually referencing closures? ./snd -l snd-test 24 hits this in the effects dialogs */
-	      ((!has_structure(slot_value(slot))) ||    /* see s7test example, vector has closure that refers to vector */
-	       (slot_symbol(slot) == sc->local_signature_symbol)))
-	    {
-	      if (!sent_let)
-		{
-		  port_write_string(port)(sc, "(let (", 6, port);
-		  sent_let = true;
-		}
-	      port_write_character(port)(sc, '(', port);
-	      port_write_string(port)(sc, symbol_name(slot_symbol(slot)), symbol_name_length(slot_symbol(slot)), port);
-	      port_write_character(port)(sc, ' ', port);
-	      /* (object->string (list (let ((local 1)) (lambda (x) (+ x local)))) :readable) */
-	      object_to_port(sc, slot_value(slot), port, P_READABLE, NULL);
-	      if (is_null(cdr(x)))
-		port_write_character(port)(sc, ')', port);
-	      else port_write_string(port)(sc, ") ", 2, port);
-	    }}
+        {
+          s7_pointer slot = car(x);
+          if ((!is_any_closure(slot_value(slot))) &&    /* mutually referencing closures? ./snd -l snd-test 24 hits this in the effects dialogs */
+              ((!has_structure(slot_value(slot))) ||    /* see s7test example, vector has closure that refers to vector */
+               (slot_symbol(slot) == sc->local_signature_symbol)))
+            {
+              if (!sent_let)
+                {
+                  port_write_string(port)(sc, "(let (", 6, port);
+                  sent_let = true;
+                }
+              port_write_character(port)(sc, '(', port);
+              port_write_string(port)(sc, symbol_name(slot_symbol(slot)), symbol_name_length(slot_symbol(slot)), port);
+              port_write_character(port)(sc, ' ', port);
+              /* (object->string (list (let ((local 1)) (lambda (x) (+ x local)))) :readable) */
+              object_to_port(sc, slot_value(slot), port, P_READABLE, NULL);
+              if (is_null(cdr(x)))
+                port_write_character(port)(sc, ')', port);
+              else port_write_string(port)(sc, ") ", 2, port);
+            }}
       if (sent_let) port_write_string(port)(sc, ") ", 2, port);
     }
 
@@ -34742,17 +34742,17 @@ static void write_closure_readably(s7_scheme *sc, s7_pointer obj, s7_pointer por
   if (!is_null(local_slots))
     for (s7_pointer x = local_slots; is_pair(x); x = cdr(x))
       {
-	s7_pointer slot = car(x);
-	if ((is_any_closure(slot_value(slot))) &&
-	    (slot_value(slot) == obj))
-	  {
-	    port_write_string(port)(sc, "(letrec ((", 10, port); /* (letrec ((f (lambda () f))) f) */
-	    sent_letrec = true;
-	    port_write_string(port)(sc, symbol_name(slot_symbol(slot)), symbol_name_length(slot_symbol(slot)), port);
-	    port_write_character(port)(sc, ' ', port);
-	    obj_slot = slot;
-	    break;
-	  }}
+        s7_pointer slot = car(x);
+        if ((is_any_closure(slot_value(slot))) &&
+            (slot_value(slot) == obj))
+          {
+            port_write_string(port)(sc, "(letrec ((", 10, port); /* (letrec ((f (lambda () f))) f) */
+            sent_letrec = true;
+            port_write_string(port)(sc, symbol_name(slot_symbol(slot)), symbol_name_length(slot_symbol(slot)), port);
+            port_write_character(port)(sc, ' ', port);
+            obj_slot = slot;
+            break;
+          }}
 
   if (setter)
     port_write_string(port)(sc, "(dilambda ", 10, port);
@@ -34763,7 +34763,7 @@ static void write_closure_readably(s7_scheme *sc, s7_pointer obj, s7_pointer por
     {
       port_write_character(port)(sc, ' ', port);
       if (has_closure_let(setter))
-	write_closure_readably_1(sc, setter, closure_args(setter), closure_body(setter), port);
+        write_closure_readably_1(sc, setter, closure_args(setter), closure_body(setter), port);
       else object_to_port_with_circle_check(sc, setter, port, P_READABLE, ci);
       port_write_character(port)(sc, ')', port);
     }
@@ -34785,118 +34785,118 @@ static void iterator_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use
   if (use_write == P_READABLE)
     {
       if (iterator_is_at_end(obj))
-	{
-	  switch (type(iterator_sequence(obj)))
-	    {
-	    case T_NIL:
-	    case T_PAIR:         port_write_string(port)(sc, "(make-iterator ())", 18, port);	        break;
-	    case T_STRING:       port_write_string(port)(sc, "(make-iterator \"\")", 18, port);	        break;
-	    case T_BYTE_VECTOR:  port_write_string(port)(sc, "(make-iterator #u())", 20, port);	        break;
-	    case T_VECTOR:       port_write_string(port)(sc, "(make-iterator #())", 19, port);	        break;
-	    case T_INT_VECTOR:	 port_write_string(port)(sc, "(make-iterator #i())", 20, port);	        break;
-	    case T_FLOAT_VECTOR: port_write_string(port)(sc, "(make-iterator #r())", 20, port);	        break;
-	    case T_LET:	         port_write_string(port)(sc, "(make-iterator (inlet))", 23, port);      break;
-
-	    case T_HASH_TABLE:
-	      if (is_weak_hash_table(iterator_sequence(obj)))
-		port_write_string(port)(sc, "(make-iterator (weak-hash-table))", 33, port);
-	      else port_write_string(port)(sc, "(make-iterator (hash-table))", 28, port);
-	      break;
-
-	    default:
-	      port_write_string(port)(sc, "(make-iterator ())", 18, port);	        break; /* c-object?? function? */
-	    }}
+        {
+          switch (type(iterator_sequence(obj)))
+            {
+            case T_NIL:
+            case T_PAIR:         port_write_string(port)(sc, "(make-iterator ())", 18, port);                break;
+            case T_STRING:       port_write_string(port)(sc, "(make-iterator \"\")", 18, port);                break;
+            case T_BYTE_VECTOR:  port_write_string(port)(sc, "(make-iterator #u())", 20, port);                break;
+            case T_VECTOR:       port_write_string(port)(sc, "(make-iterator #())", 19, port);                break;
+            case T_INT_VECTOR:         port_write_string(port)(sc, "(make-iterator #i())", 20, port);                break;
+            case T_FLOAT_VECTOR: port_write_string(port)(sc, "(make-iterator #r())", 20, port);                break;
+            case T_LET:                 port_write_string(port)(sc, "(make-iterator (inlet))", 23, port);      break;
+
+            case T_HASH_TABLE:
+              if (is_weak_hash_table(iterator_sequence(obj)))
+                port_write_string(port)(sc, "(make-iterator (weak-hash-table))", 33, port);
+              else port_write_string(port)(sc, "(make-iterator (hash-table))", 28, port);
+              break;
+
+            default:
+              port_write_string(port)(sc, "(make-iterator ())", 18, port);                break; /* c-object?? function? */
+            }}
       else
-	{
-	  s7_pointer seq = iterator_sequence(obj);
-	  int32_t iter_ref;
-	  if ((ci) &&
-	      (is_cyclic(obj)) &&
-	      ((iter_ref = peek_shared_ref(ci, obj)) != 0))
-	    {
-	      /* basically the same as c_pointer_to_port */
-	      if (!is_cyclic_set(obj))
-		{
-		  int32_t nlen;
-		  char buf[128];
-		  if (iter_ref < 0) iter_ref = -iter_ref;
-
-		  if (ci->init_port == sc->F)
-		    {
-		      ci->init_port = s7_open_output_string(sc);
-		      ci->init_loc = gc_protect_1(sc, ci->init_port);
-		    }
-		  port_write_string(port)(sc, "#f", 2, port);
-		  nlen = (int32_t)catstrs_direct(buf, "  (set! <", pos_int_to_str_direct(sc, iter_ref), "> (make-iterator ", (const char *)NULL);
-		  port_write_string(ci->init_port)(sc, buf, nlen, ci->init_port);
-
-		  flip_ref(ci, seq);
-		  object_to_port_with_circle_check(sc, seq, ci->init_port, use_write, ci);
-		  flip_ref(ci, seq);
-
-		  port_write_string(ci->init_port)(sc, "))\n", 3, ci->init_port);
-		  set_cyclic_set(obj);
-		  return;
-		}}
-
-	  if (is_string(seq))
-	    {
-	      s7_int len = string_length(seq) - iterator_position(obj);
-	      if (len == 0)
-		port_write_string(port)(sc, "(make-iterator \"\")", 18, port);
-	      else
-		{
-		  const char *iter_str = (const char *)(string_value(seq) + iterator_position(obj));
-		  port_write_string(port)(sc, "(make-iterator \"", 16, port);
-		  if (!string_needs_slashification((const uint8_t *)iter_str, len))
-		    port_write_string(port)(sc, iter_str, len, port);
-		  else slashify_string_to_port(sc, port, iter_str, len, NOT_IN_QUOTES);
-		  port_write_string(port)(sc, "\")", 2, port);
-		}}
-	  else
-	    {
-	      if (is_pair(seq))
-		{
-		  port_write_string(port)(sc, "(make-iterator ", 15, port);
-		  object_to_port_with_circle_check(sc, iterator_current(obj), port, use_write, ci);
-		  port_write_character(port)(sc, ')', port);
-		}
-	      else
-		{
-		  if ((is_let(seq)) && (seq != sc->rootlet) && (seq != sc->s7_starlet))
-		    {
-		      port_write_string(port)(sc, "(let ((iter (make-iterator ", 27, port);
-		      object_to_port_with_circle_check(sc, seq, port, use_write, ci);
-		      port_write_string(port)(sc, "))) ", 4, port);
-		      for (s7_pointer slot = let_slots(seq); slot != iterator_current_slot(obj); slot = next_slot(slot))
-			port_write_string(port)(sc, "(iter) ", 7, port);
-		      port_write_string(port)(sc, "iter)", 5, port);
-		    }
-		  else
-		    {
-		      if (iterator_position(obj) > 0)
-			port_write_string(port)(sc, "(let ((iter (make-iterator ", 27, port);
-		      else port_write_string(port)(sc, "(make-iterator ", 15, port);
-		      object_to_port_with_circle_check(sc, seq, port, use_write, ci);
-		      if (iterator_position(obj) > 0)
-			{
-			  if (iterator_position(obj) == 1)
-			    port_write_string(port)(sc, "))) (iter) iter)", 16, port);
-			  else
-			    {
-			      char str[128];
-			      int32_t nlen = (int32_t)catstrs_direct(str, "))) (do ((i 0 (+ i 1))) ((= i ",
-								     pos_int_to_str_direct(sc, iterator_position(obj)),
-								     ") iter) (iter)))", (const char *)NULL);
-			      port_write_string(port)(sc, str, nlen, port);
-			    }}
-		      else port_write_character(port)(sc, ')', port);
-		    }}}}}
+        {
+          s7_pointer seq = iterator_sequence(obj);
+          int32_t iter_ref;
+          if ((ci) &&
+              (is_cyclic(obj)) &&
+              ((iter_ref = peek_shared_ref(ci, obj)) != 0))
+            {
+              /* basically the same as c_pointer_to_port */
+              if (!is_cyclic_set(obj))
+                {
+                  int32_t nlen;
+                  char buf[128];
+                  if (iter_ref < 0) iter_ref = -iter_ref;
+
+                  if (ci->init_port == sc->F)
+                    {
+                      ci->init_port = s7_open_output_string(sc);
+                      ci->init_loc = gc_protect_1(sc, ci->init_port);
+                    }
+                  port_write_string(port)(sc, "#f", 2, port);
+                  nlen = (int32_t)catstrs_direct(buf, "  (set! <", pos_int_to_str_direct(sc, iter_ref), "> (make-iterator ", (const char *)NULL);
+                  port_write_string(ci->init_port)(sc, buf, nlen, ci->init_port);
+
+                  flip_ref(ci, seq);
+                  object_to_port_with_circle_check(sc, seq, ci->init_port, use_write, ci);
+                  flip_ref(ci, seq);
+
+                  port_write_string(ci->init_port)(sc, "))\n", 3, ci->init_port);
+                  set_cyclic_set(obj);
+                  return;
+                }}
+
+          if (is_string(seq))
+            {
+              s7_int len = string_length(seq) - iterator_position(obj);
+              if (len == 0)
+                port_write_string(port)(sc, "(make-iterator \"\")", 18, port);
+              else
+                {
+                  const char *iter_str = (const char *)(string_value(seq) + iterator_position(obj));
+                  port_write_string(port)(sc, "(make-iterator \"", 16, port);
+                  if (!string_needs_slashification((const uint8_t *)iter_str, len))
+                    port_write_string(port)(sc, iter_str, len, port);
+                  else slashify_string_to_port(sc, port, iter_str, len, NOT_IN_QUOTES);
+                  port_write_string(port)(sc, "\")", 2, port);
+                }}
+          else
+            {
+              if (is_pair(seq))
+                {
+                  port_write_string(port)(sc, "(make-iterator ", 15, port);
+                  object_to_port_with_circle_check(sc, iterator_current(obj), port, use_write, ci);
+                  port_write_character(port)(sc, ')', port);
+                }
+              else
+                {
+                  if ((is_let(seq)) && (seq != sc->rootlet) && (seq != sc->s7_starlet))
+                    {
+                      port_write_string(port)(sc, "(let ((iter (make-iterator ", 27, port);
+                      object_to_port_with_circle_check(sc, seq, port, use_write, ci);
+                      port_write_string(port)(sc, "))) ", 4, port);
+                      for (s7_pointer slot = let_slots(seq); slot != iterator_current_slot(obj); slot = next_slot(slot))
+                        port_write_string(port)(sc, "(iter) ", 7, port);
+                      port_write_string(port)(sc, "iter)", 5, port);
+                    }
+                  else
+                    {
+                      if (iterator_position(obj) > 0)
+                        port_write_string(port)(sc, "(let ((iter (make-iterator ", 27, port);
+                      else port_write_string(port)(sc, "(make-iterator ", 15, port);
+                      object_to_port_with_circle_check(sc, seq, port, use_write, ci);
+                      if (iterator_position(obj) > 0)
+                        {
+                          if (iterator_position(obj) == 1)
+                            port_write_string(port)(sc, "))) (iter) iter)", 16, port);
+                          else
+                            {
+                              char str[128];
+                              int32_t nlen = (int32_t)catstrs_direct(str, "))) (do ((i 0 (+ i 1))) ((= i ",
+                                                                     pos_int_to_str_direct(sc, iterator_position(obj)),
+                                                                     ") iter) (iter)))", (const char *)NULL);
+                              port_write_string(port)(sc, str, nlen, port);
+                            }}
+                      else port_write_character(port)(sc, ')', port);
+                    }}}}}
   else
     {
       const char *str;
       if ((is_hash_table(iterator_sequence(obj))) && (is_weak_hash_table(iterator_sequence(obj))))
-	str = "weak-hash-table";
+        str = "weak-hash-table";
       else str = type_name(sc, iterator_sequence(obj), NO_ARTICLE);
       port_write_string(port)(sc, "#<iterator: ", 12, port);
       port_write_string(port)(sc, str, safe_strlen(str), port);
@@ -34915,58 +34915,58 @@ static void c_pointer_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, us
     {
       int32_t ref;
       if ((ci) &&
-	  (is_cyclic(obj)) &&
-	  ((ref = peek_shared_ref(ci, obj)) != 0))
-	{
-	  port_write_string(port)(sc, "#f", 2, port);
-	  if (!is_cyclic_set(obj))
-	    {
-	      if (ci->init_port == sc->F)
-		{
-		  ci->init_port = s7_open_output_string(sc);
-		  ci->init_loc = gc_protect_1(sc, ci->init_port);
-		}
-	      nlen = snprintf(buf, CP_BUFSIZE, "  (set! <%d> (c-pointer %" p64, -ref, (intptr_t)c_pointer(obj));
-	      port_write_string(ci->init_port)(sc, buf, nlen, ci->init_port);
-
-	      if ((c_pointer_type(obj) != sc->F) ||
-		  (c_pointer_info(obj) != sc->F))
-		{
-		  flip_ref(ci, c_pointer_type(obj));
-
-		  port_write_character(ci->init_port)(sc, ' ', ci->init_port);
-		  object_to_port_with_circle_check(sc, c_pointer_type(obj), ci->init_port, use_write, ci);
-
-		  flip_ref(ci, c_pointer_type(obj));
-		  flip_ref(ci, c_pointer_info(obj));
-
-		  port_write_character(ci->init_port)(sc, ' ', ci->init_port);
-		  object_to_port_with_circle_check(sc, c_pointer_info(obj), ci->init_port, use_write, ci);
-
-		  flip_ref(ci, c_pointer_info(obj));
-		}
-	      port_write_string(ci->init_port)(sc, "))\n", 3, ci->init_port);
-	      set_cyclic_set(obj);
-	    }}
+          (is_cyclic(obj)) &&
+          ((ref = peek_shared_ref(ci, obj)) != 0))
+        {
+          port_write_string(port)(sc, "#f", 2, port);
+          if (!is_cyclic_set(obj))
+            {
+              if (ci->init_port == sc->F)
+                {
+                  ci->init_port = s7_open_output_string(sc);
+                  ci->init_loc = gc_protect_1(sc, ci->init_port);
+                }
+              nlen = snprintf(buf, CP_BUFSIZE, "  (set! <%d> (c-pointer %" p64, -ref, (intptr_t)c_pointer(obj));
+              port_write_string(ci->init_port)(sc, buf, nlen, ci->init_port);
+
+              if ((c_pointer_type(obj) != sc->F) ||
+                  (c_pointer_info(obj) != sc->F))
+                {
+                  flip_ref(ci, c_pointer_type(obj));
+
+                  port_write_character(ci->init_port)(sc, ' ', ci->init_port);
+                  object_to_port_with_circle_check(sc, c_pointer_type(obj), ci->init_port, use_write, ci);
+
+                  flip_ref(ci, c_pointer_type(obj));
+                  flip_ref(ci, c_pointer_info(obj));
+
+                  port_write_character(ci->init_port)(sc, ' ', ci->init_port);
+                  object_to_port_with_circle_check(sc, c_pointer_info(obj), ci->init_port, use_write, ci);
+
+                  flip_ref(ci, c_pointer_info(obj));
+                }
+              port_write_string(ci->init_port)(sc, "))\n", 3, ci->init_port);
+              set_cyclic_set(obj);
+            }}
       else
-	{
-	  nlen = snprintf(buf, CP_BUFSIZE, "(c-pointer %" p64, (intptr_t)c_pointer(obj));
-	  port_write_string(port)(sc, buf, clamp_length(nlen, CP_BUFSIZE), port);
-	  if ((c_pointer_type(obj) != sc->F) ||
-	      (c_pointer_info(obj) != sc->F))
-	    {
-	      port_write_character(port)(sc, ' ', port);
-	      object_to_port_with_circle_check(sc, c_pointer_type(obj), port, use_write, ci);
-	      port_write_character(port)(sc, ' ', port);
-	      object_to_port_with_circle_check(sc, c_pointer_info(obj), port, use_write, ci);
-	    }
-	  port_write_character(port)(sc, ')', port);
-	}}
+        {
+          nlen = snprintf(buf, CP_BUFSIZE, "(c-pointer %" p64, (intptr_t)c_pointer(obj));
+          port_write_string(port)(sc, buf, clamp_length(nlen, CP_BUFSIZE), port);
+          if ((c_pointer_type(obj) != sc->F) ||
+              (c_pointer_info(obj) != sc->F))
+            {
+              port_write_character(port)(sc, ' ', port);
+              object_to_port_with_circle_check(sc, c_pointer_type(obj), port, use_write, ci);
+              port_write_character(port)(sc, ' ', port);
+              object_to_port_with_circle_check(sc, c_pointer_info(obj), port, use_write, ci);
+            }
+          port_write_character(port)(sc, ')', port);
+        }}
   else
     {
       if ((is_symbol(c_pointer_type(obj))) &&
-	  (symbol_name_length(c_pointer_type(obj)) < (CP_BUFSIZE / 2)))
-	nlen = snprintf(buf, CP_BUFSIZE, "#<%s %p>", symbol_name(c_pointer_type(obj)), c_pointer(obj));
+          (symbol_name_length(c_pointer_type(obj)) < (CP_BUFSIZE / 2)))
+        nlen = snprintf(buf, CP_BUFSIZE, "#<%s %p>", symbol_name(c_pointer_type(obj)), c_pointer(obj));
       else nlen = snprintf(buf, CP_BUFSIZE, "#<c_pointer %p>", c_pointer(obj));
       port_write_string(port)(sc, buf, clamp_length(nlen, CP_BUFSIZE), port);
     }
@@ -35034,14 +35034,14 @@ static void integer_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_
   if (has_number_name(obj))
     {
       if (is_string_port(port))
-	{
-	  if (port_position(port) + number_name_length(obj) < port_data_size(port))
-	    {
-	      memcpy((void *)(port_data(port) + port_position(port)), (void *)number_name(obj), number_name_length(obj));
-	      port_position(port) += number_name_length(obj);
-	    }
-	  else string_write_string_resized(sc, number_name(obj), number_name_length(obj), port);
-	}
+        {
+          if (port_position(port) + number_name_length(obj) < port_data_size(port))
+            {
+              memcpy((void *)(port_data(port) + port_position(port)), (void *)number_name(obj), number_name_length(obj));
+              port_position(port) += number_name_length(obj);
+            }
+          else string_write_string_resized(sc, number_name(obj), number_name_length(obj), port);
+        }
       else port_write_string(port)(sc, number_name(obj), number_name_length(obj), port);
     }
   else
@@ -35062,10 +35062,10 @@ static void number_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_w
       s7_int nlen = 0;
       char *str = number_to_string_base_10(sc, obj, 0, sc->float_format_precision, 'g', &nlen, use_write); /* was 14 */
       if ((nlen < NUMBER_NAME_SIZE) &&
-	  (str[0] != 'n') && (str[0] != 'i') &&
-	  ((!(is_t_complex(obj))) ||
-	   ((!is_NaN(imag_part(obj))) && (!is_inf(imag_part(obj))))))
-	set_number_name(obj, str, nlen);
+          (str[0] != 'n') && (str[0] != 'i') &&
+          ((!(is_t_complex(obj))) ||
+           ((!is_NaN(imag_part(obj))) && (!is_inf(imag_part(obj))))))
+        set_number_name(obj, str, nlen);
       port_write_string(port)(sc, str, nlen, port);
     }
 }
@@ -35106,12 +35106,12 @@ static void closure_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_
        */
       s7_pointer print_func = find_method(sc, closure_let(obj), sc->object_to_string_symbol);
       if (print_func != sc->undefined)
-	{
-	  s7_pointer p = s7_apply_function(sc, print_func, set_plist_1(sc, obj));
-	  if (string_length(p) > 0)
-	    port_write_string(port)(sc, string_value(p), string_length(p), port);
-	  return;
-	}}
+        {
+          s7_pointer p = s7_apply_function(sc, print_func, set_plist_1(sc, obj));
+          if (string_length(p) > 0)
+            port_write_string(port)(sc, string_value(p), string_length(p), port);
+          return;
+        }}
   if (use_write == P_READABLE)
     write_closure_readably(sc, obj, port, ci);
   else write_closure_name(sc, obj, port);
@@ -35123,12 +35123,12 @@ static void macro_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use_wr
     {
       s7_pointer print_func = find_method(sc, closure_let(obj), sc->object_to_string_symbol);
       if (print_func != sc->undefined)
-	{
-	  s7_pointer p = s7_apply_function(sc, print_func, set_plist_1(sc, obj));
-	  if (string_length(p) > 0)
-	    port_write_string(port)(sc, string_value(p), string_length(p), port);
-	  return;
-	}}
+        {
+          s7_pointer p = s7_apply_function(sc, print_func, set_plist_1(sc, obj));
+          if (string_length(p) > 0)
+            port_write_string(port)(sc, string_value(p), string_length(p), port);
+          return;
+        }}
   if (use_write == P_READABLE)
     write_macro_readably(sc, obj, port);
   else write_closure_name(sc, obj, port);
@@ -35220,78 +35220,78 @@ static void c_object_to_port(s7_scheme *sc, s7_pointer obj, s7_pointer port, use
   else
     {
       if ((use_write == P_READABLE) &&
-	  (c_object_to_list(sc, obj)) &&  /* to_list and (implicit) set are needed to reconstruct a cyclic c-object, as well as the maker (via type name) */
-	  (c_object_set(sc, obj)))
-	{
-	  int32_t href;
-	  s7_pointer old_w = sc->w;
-	  s7_pointer obj_list = ((*(c_object_to_list(sc, obj)))(sc, set_mlist_1(sc, obj)));
-	  s7_pointer p = obj_list;
-	  sc->w = obj_list;
-	  if ((ci) &&
-	      (is_cyclic(obj)) &&
-	      ((href = peek_shared_ref(ci, obj)) != 0))
-	    {
-	      if (href < 0) href = -href;
-	      if ((ci->defined[href]) || (port == ci->cycle_port))
-		{
-		  char buf[128];
-		  int32_t nlen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
-		  port_write_string(port)(sc, buf, nlen, port);
-		  return;
-		}
-	      port_write_character(port)(sc, '(', port);
-	      c_object_name_to_port(sc, obj, port);
-	      for (int32_t i = 0; is_pair(p); i++, p = cdr(p))
-		{
-		  s7_pointer val = car(p);
-		  if (has_structure(val))
-		    {
-		      char buf[128];
-		      int32_t symref;
-		      int32_t len = (int32_t)catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, href), "> ", pos_int_to_str_direct_1(sc, i), ") ", (const char *)NULL);
-		      port_write_string(port)(sc, " #f", 3, port);
-		      port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
-
-		      symref = peek_shared_ref(ci, val);
-		      if (symref != 0)
-			{
-			  if (symref < 0) symref = -symref;
-			  len = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, symref), ">)\n", (const char *)NULL);
-			  port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
-			}
-		      else
-			{
-			  object_to_port_with_circle_check(sc, val, ci->cycle_port, P_READABLE, ci);
-			  port_write_string(ci->cycle_port)(sc, ")\n", 2, ci->cycle_port);
-			}}
-		  else
-		    {
-		      port_write_character(port)(sc, ' ', port);
-		      object_to_port_with_circle_check(sc, val, port, P_READABLE, ci);
-		    }}}
-	  else
-	    {
-	      port_write_character(port)(sc, '(', port);
-	      c_object_name_to_port(sc, obj, port);
-	      for (p = obj_list; is_pair(p); p = cdr(p))
-		{
-		  s7_pointer val = car(p);
-		  port_write_character(port)(sc, ' ', port);
-		  object_to_port_with_circle_check(sc, val, port, P_READABLE, ci);
-		}}
-	  port_write_character(port)(sc, ')', port);
-	  sc->w = old_w;
-	}
+          (c_object_to_list(sc, obj)) &&  /* to_list and (implicit) set are needed to reconstruct a cyclic c-object, as well as the maker (via type name) */
+          (c_object_set(sc, obj)))
+        {
+          int32_t href;
+          s7_pointer old_w = sc->w;
+          s7_pointer obj_list = ((*(c_object_to_list(sc, obj)))(sc, set_mlist_1(sc, obj)));
+          s7_pointer p = obj_list;
+          sc->w = obj_list;
+          if ((ci) &&
+              (is_cyclic(obj)) &&
+              ((href = peek_shared_ref(ci, obj)) != 0))
+            {
+              if (href < 0) href = -href;
+              if ((ci->defined[href]) || (port == ci->cycle_port))
+                {
+                  char buf[128];
+                  int32_t nlen = catstrs_direct(buf, "<", pos_int_to_str_direct(sc, href), ">", (const char *)NULL);
+                  port_write_string(port)(sc, buf, nlen, port);
+                  return;
+                }
+              port_write_character(port)(sc, '(', port);
+              c_object_name_to_port(sc, obj, port);
+              for (int32_t i = 0; is_pair(p); i++, p = cdr(p))
+                {
+                  s7_pointer val = car(p);
+                  if (has_structure(val))
+                    {
+                      char buf[128];
+                      int32_t symref;
+                      int32_t len = (int32_t)catstrs_direct(buf, "  (set! (<", pos_int_to_str_direct(sc, href), "> ", pos_int_to_str_direct_1(sc, i), ") ", (const char *)NULL);
+                      port_write_string(port)(sc, " #f", 3, port);
+                      port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
+
+                      symref = peek_shared_ref(ci, val);
+                      if (symref != 0)
+                        {
+                          if (symref < 0) symref = -symref;
+                          len = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, symref), ">)\n", (const char *)NULL);
+                          port_write_string(ci->cycle_port)(sc, buf, len, ci->cycle_port);
+                        }
+                      else
+                        {
+                          object_to_port_with_circle_check(sc, val, ci->cycle_port, P_READABLE, ci);
+                          port_write_string(ci->cycle_port)(sc, ")\n", 2, ci->cycle_port);
+                        }}
+                  else
+                    {
+                      port_write_character(port)(sc, ' ', port);
+                      object_to_port_with_circle_check(sc, val, port, P_READABLE, ci);
+                    }}}
+          else
+            {
+              port_write_character(port)(sc, '(', port);
+              c_object_name_to_port(sc, obj, port);
+              for (p = obj_list; is_pair(p); p = cdr(p))
+                {
+                  s7_pointer val = car(p);
+                  port_write_character(port)(sc, ' ', port);
+                  object_to_port_with_circle_check(sc, val, port, P_READABLE, ci);
+                }}
+          port_write_character(port)(sc, ')', port);
+          sc->w = old_w;
+        }
       else
-	{
-	  char buf[128];
-	  int32_t nlen;
-	  port_write_string(port)(sc, "#<", 2, port);
-	  c_object_name_to_port(sc, obj, port);
-	  nlen = snprintf(buf, 128, " %p>", obj);
-	  port_write_string(port)(sc, buf, clamp_length(nlen, 128), port);
-	}}
+        {
+          char buf[128];
+          int32_t nlen;
+          port_write_string(port)(sc, "#<", 2, port);
+          c_object_name_to_port(sc, obj, port);
+          nlen = snprintf(buf, 128, " %p>", obj);
+          port_write_string(port)(sc, buf, clamp_length(nlen, 128), port);
+        }}
 }
 
 static void stack_to_port(s7_scheme *sc, const s7_pointer obj, s7_pointer port, use_write_t unused_use_write, shared_info_t *unused_ci)
@@ -35366,39 +35366,39 @@ static void object_to_port_with_circle_check_1(s7_scheme *sc, s7_pointer vr, s7_
       char buf[32];
       int32_t nlen;
       if (ref > 0)
-	{
-	  if (use_write == P_READABLE)
-	    {
-	      if (ci->defined[ref])
-		{
-		  flip_ref(ci, vr);
-		  nlen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, ref), ">", (const char *)NULL);
-		  port_write_string(port)(sc, buf, nlen, port);
-		  return;
-		}
-	      object_to_port(sc, vr, port, P_READABLE, ci);
-	    }
-	  else
-	    { /* "normal" printout involving #n= and #n# */
-	      s7_int len = 0;
-	      char *p = pos_int_to_str(sc, (s7_int)ref, &len, '=');
-	      *--p = '#';
-	      port_write_string(port)(sc, p, len, port);
-	      object_to_port(sc, vr, port, not_p_display(use_write), ci);
-	    }}
+        {
+          if (use_write == P_READABLE)
+            {
+              if (ci->defined[ref])
+                {
+                  flip_ref(ci, vr);
+                  nlen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, ref), ">", (const char *)NULL);
+                  port_write_string(port)(sc, buf, nlen, port);
+                  return;
+                }
+              object_to_port(sc, vr, port, P_READABLE, ci);
+            }
+          else
+            { /* "normal" printout involving #n= and #n# */
+              s7_int len = 0;
+              char *p = pos_int_to_str(sc, (s7_int)ref, &len, '=');
+              *--p = '#';
+              port_write_string(port)(sc, p, len, port);
+              object_to_port(sc, vr, port, not_p_display(use_write), ci);
+            }}
       else
-	if (use_write == P_READABLE)
-	  {
-	    nlen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, -ref), ">", (const char *)NULL);
-	    port_write_string(port)(sc, buf, nlen, port);
-	  }
-	else
-	  {
-	    s7_int len = 0;
-	    char *p = pos_int_to_str(sc, (s7_int)(-ref), &len, '#');
-	    *--p = '#';
-	    port_write_string(port)(sc, p, len, port);
-	  }}
+        if (use_write == P_READABLE)
+          {
+            nlen = (int32_t)catstrs_direct(buf, "<", pos_int_to_str_direct(sc, -ref), ">", (const char *)NULL);
+            port_write_string(port)(sc, buf, nlen, port);
+          }
+        else
+          {
+            s7_int len = 0;
+            char *p = pos_int_to_str(sc, (s7_int)(-ref), &len, '#');
+            *--p = '#';
+            port_write_string(port)(sc, p, len, port);
+          }}
 }
 
 static s7_pointer cyclic_out(s7_scheme *sc, s7_pointer obj, s7_pointer port, shared_info_t *ci)
@@ -35465,13 +35465,13 @@ static void object_out_1(s7_scheme *sc, s7_pointer obj, s7_pointer strport, use_
     {
       shared_info_t *ci = load_shared_info(sc, T_Pos(obj), choice != P_READABLE, sc->circle_info);
       if (ci)
-	{
-	  sc->object_out_locked = true;
-	  if (choice == P_READABLE)
-	    cyclic_out(sc, obj, strport, ci);
-	  else object_to_port_with_circle_check(sc, T_Pos(obj), strport, choice, ci);
-	  sc->object_out_locked = false;
-	}
+        {
+          sc->object_out_locked = true;
+          if (choice == P_READABLE)
+            cyclic_out(sc, obj, strport, ci);
+          else object_to_port_with_circle_check(sc, T_Pos(obj), strport, choice, ci);
+          sc->object_out_locked = false;
+        }
       else object_to_port(sc, obj, strport, choice, NULL);
     }
 }
@@ -35594,24 +35594,24 @@ static s7_pointer g_object_to_string(s7_scheme *sc, s7_pointer args)
       s7_pointer arg = cadr(args);
       if (arg == sc->F) choice = P_DISPLAY;
       else {if (arg == sc->T) choice = P_WRITE;
-	else {if (arg == sc->readable_keyword) choice = P_READABLE;
-	  else {if (arg == sc->display_keyword) choice = P_DISPLAY;
-	    else {if (arg == sc->write_keyword) choice = P_WRITE;
-	      else wrong_type_error_nr(sc, sc->object_to_string_symbol, 2, arg, wrap_string(sc, "a boolean or :readable", 22));}}}}
+        else {if (arg == sc->readable_keyword) choice = P_READABLE;
+          else {if (arg == sc->display_keyword) choice = P_DISPLAY;
+            else {if (arg == sc->write_keyword) choice = P_WRITE;
+              else wrong_type_error_nr(sc, sc->object_to_string_symbol, 2, arg, wrap_string(sc, "a boolean or :readable", 22));}}}}
 
       if (is_not_null(cddr(args)))
-	{
-	  arg = caddr(args);
-	  if (!s7_is_integer(arg))
-	    {
-	      if (choice == P_READABLE) /* (object->string #r(1 2 3) :readable "hi") */
-		wrong_type_error_nr(sc, sc->object_to_string_symbol, 3, arg, sc->type_names[T_INTEGER]);
-	      return(method_or_bust(sc, arg, sc->object_to_string_symbol, args, sc->type_names[T_INTEGER], 3));
-	    }
-	  if (s7_integer_clamped_if_gmp(sc, arg) < 0)
-	    out_of_range_error_nr(sc, sc->object_to_string_symbol, int_three, arg, a_non_negative_integer_string);
-	  pending_max = s7_integer_clamped_if_gmp(sc, arg);
-	}}
+        {
+          arg = caddr(args);
+          if (!s7_is_integer(arg))
+            {
+              if (choice == P_READABLE) /* (object->string #r(1 2 3) :readable "hi") */
+                wrong_type_error_nr(sc, sc->object_to_string_symbol, 3, arg, sc->type_names[T_INTEGER]);
+              return(method_or_bust(sc, arg, sc->object_to_string_symbol, args, sc->type_names[T_INTEGER], 3));
+            }
+          if (s7_integer_clamped_if_gmp(sc, arg) < 0)
+            out_of_range_error_nr(sc, sc->object_to_string_symbol, int_three, arg, a_non_negative_integer_string);
+          pending_max = s7_integer_clamped_if_gmp(sc, arg);
+        }}
   else choice = P_WRITE;
   /* can't use s7_object_to_string here anymore because it assumes use_write arg is a boolean */
 
@@ -35629,20 +35629,20 @@ static s7_pointer g_object_to_string(s7_scheme *sc, s7_pointer args)
       (out_len > pending_max))
     {
       if (choice == P_READABLE)  /* (object->string #r(1 2 3) :readable 4) */
-	{
-	  close_format_port(sc, strport);
-	  sc->has_openlets = old_openlets;
-	  out_of_range_error_nr(sc, sc->object_to_string_symbol, int_three, wrap_integer(sc, out_len), wrap_string(sc, "the readable string is too long", 31));
-	}
+        {
+          close_format_port(sc, strport);
+          sc->has_openlets = old_openlets;
+          out_of_range_error_nr(sc, sc->object_to_string_symbol, int_three, wrap_integer(sc, out_len), wrap_string(sc, "the readable string is too long", 31));
+        }
       out_len = pending_max;
       if (out_len < 3)
-	{
-	  close_format_port(sc, strport);
-	  sc->has_openlets = old_openlets;
-	  return(make_string_with_length(sc, "...", 3));
-	}
+        {
+          close_format_port(sc, strport);
+          sc->has_openlets = old_openlets;
+          return(make_string_with_length(sc, "...", 3));
+        }
       for (s7_int i = out_len - 3; i < out_len; i++)
-	port_data(strport)[i] = (uint8_t)'.';
+        port_data(strport)[i] = (uint8_t)'.';
     }
   if (out_len >= port_data_size(strport)) /* this can happen (but only == I think) */
     res = block_to_string(sc, reallocate(sc, port_data_block(strport), out_len + 1), out_len);
@@ -35709,7 +35709,7 @@ s7_pointer s7_write(s7_scheme *sc, s7_pointer obj, s7_pointer port)
   if (port != sc->F)
     {
       if (port_is_closed(port))
-	wrong_type_error_nr(sc, sc->write_symbol, 2, port, an_open_output_port_string);
+        wrong_type_error_nr(sc, sc->write_symbol, 2, port, an_open_output_port_string);
       object_out(sc, obj, port, P_WRITE);
     }
   return(obj);
@@ -35748,7 +35748,7 @@ s7_pointer s7_display(s7_scheme *sc, s7_pointer obj, s7_pointer port)
   if (port != sc->F)
     {
       if (port_is_closed(port))
-	wrong_type_error_nr(sc, sc->display_symbol, 2, port, an_open_output_port_string);
+        wrong_type_error_nr(sc, sc->display_symbol, 2, port, an_open_output_port_string);
       object_out(sc, obj, port, P_DISPLAY);
     }
   return(obj);
@@ -35848,12 +35848,12 @@ calls thunk, then returns the collected output"
   if (!is_thunk(sc, proc))
     {
       if (is_any_procedure(proc))        /* i.e. c_function, lambda, macro, etc */
-	{
-	  s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
-	  error_nr(sc, sc->wrong_type_arg_symbol,
-		   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-output-to-string's first argument should be a thunk", 87),
-			       proc, req_args, req_args));
-	}
+        {
+          s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
+          error_nr(sc, sc->wrong_type_arg_symbol,
+                   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-output-to-string's first argument should be a thunk", 87),
+                               proc, req_args, req_args));
+        }
       else return(method_or_bust(sc, proc, sc->with_output_to_string_symbol, args, a_thunk_string, 1));
     }
   if ((is_continuation(proc)) || (is_goto(proc)))
@@ -35880,12 +35880,12 @@ static s7_pointer g_with_output_to_file(s7_scheme *sc, s7_pointer args)
   if (!is_thunk(sc, proc))
     {
       if (is_any_procedure(proc))        /* i.e. c_function, lambda, macro, etc */
-	{
-	  s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
-	  error_nr(sc, sc->wrong_type_arg_symbol,
-		   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-output-to-file's second argument should be a thunk", 86),
-			       proc, req_args, req_args));
-	}
+        {
+          s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
+          error_nr(sc, sc->wrong_type_arg_symbol,
+                   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but with-output-to-file's second argument should be a thunk", 86),
+                               proc, req_args, req_args));
+        }
       else return(method_or_bust(sc, proc, sc->with_output_to_file_symbol, args, a_thunk_string, 2));
     }
   if ((is_continuation(proc)) || (is_goto(proc)))
@@ -35911,7 +35911,7 @@ static noreturn void format_error_nr(s7_scheme *sc, const char *ur_msg, s7_int m
   if (fdat->loc == 0)
     {
       if (is_pair(args))
-	x = set_elist_4(sc, format_string_1, ctrl_str, args, msg);                                 /* "~S ~{~S~^ ~}: ~A" */
+        x = set_elist_4(sc, format_string_1, ctrl_str, args, msg);                                 /* "~S ~{~S~^ ~}: ~A" */
       else x = set_elist_3(sc, format_string_2, ctrl_str, msg);                                    /* "~S: ~A" */
     }
   else
@@ -35950,17 +35950,17 @@ static void format_append_chars(s7_scheme *sc, format_data_t *fdat, char pad, s7
   if (is_string_port(port))
     {
       if ((port_position(port) + chrs) < port_data_size(port))
-	{
-	  local_memset((char *)port_data(port) + port_position(port), pad, chrs);
-	  port_position(port) += chrs;
-	}
+        {
+          local_memset((char *)port_data(port) + port_position(port), pad, chrs);
+          port_position(port) += chrs;
+        }
       else
-	{
-	  s7_int new_len = port_position(port) + chrs;
-	  resize_port_data(sc, port, new_len * 2);
-	  local_memset((char *)port_data(port) + port_position(port), pad, chrs);
-	  port_position(port) = new_len;
-	}
+        {
+          s7_int new_len = port_position(port) + chrs;
+          resize_port_data(sc, port, new_len * 2);
+          local_memset((char *)port_data(port) + port_position(port), pad, chrs);
+          port_position(port) = new_len;
+        }
       fdat->loc += chrs;
       sc->format_column += chrs;
     }
@@ -35983,15 +35983,15 @@ static s7_int format_read_integer(s7_int *cur_i, s7_int str_len, const char *str
     {
       int32_t dig = digits[(uint8_t)str[i]];
       if (dig < 10)
-	{
+        {
 #if HAVE_OVERFLOW_CHECKS
-	  if ((multiply_overflow(lval, 10, &lval)) ||
-	      (add_overflow(lval, dig, &lval)))
-	    break;
+          if ((multiply_overflow(lval, 10, &lval)) ||
+              (add_overflow(lval, dig, &lval)))
+            break;
 #else
-	  lval = dig + (lval * 10);
+          lval = dig + (lval * 10);
 #endif
-	}
+        }
       else break;
     }
   *cur_i = i;
@@ -36009,14 +36009,14 @@ static void format_number(s7_scheme *sc, format_data_t *fdat, int32_t radix, s7_
   if (precision < 0)
     {
       if ((float_choice == 'e') ||
-	  (float_choice == 'f') ||
-	  (float_choice == 'g'))
-	precision = 6;
+          (float_choice == 'f') ||
+          (float_choice == 'g'))
+        precision = 6;
       else
-	{
-	  int32_t typ = type(car(fdat->args)); /* in the "int" cases, precision depends on the arg type */
-	  precision = ((typ == T_INTEGER) || (typ == T_RATIO)) ? 0 : 6;
-	}}
+        {
+          int32_t typ = type(car(fdat->args)); /* in the "int" cases, precision depends on the arg type */
+          precision = ((typ == T_INTEGER) || (typ == T_RATIO)) ? 0 : 6;
+        }}
   /* should (format #f "~F" 1/3) return "1/3"?? in CL it's "0.33333334" */
 
   if (pad != ' ')
@@ -36024,13 +36024,13 @@ static void format_number(s7_scheme *sc, format_data_t *fdat, int32_t radix, s7_
       char *padtmp;
 #if (!WITH_GMP)
       if (radix == 10)
-	tmp = number_to_string_base_10(sc, car(fdat->args), width, precision, float_choice, &nlen, P_WRITE);
+        tmp = number_to_string_base_10(sc, car(fdat->args), width, precision, float_choice, &nlen, P_WRITE);
       else
 #endif
-	{
-	  b = number_to_string_with_radix(sc, car(fdat->args), radix, width, precision, float_choice, &nlen);
-	  tmp = (char *)block_data(b);
-	}
+        {
+          b = number_to_string_with_radix(sc, car(fdat->args), radix, width, precision, float_choice, &nlen);
+          tmp = (char *)block_data(b);
+        }
       padtmp = tmp;
       while (*padtmp == ' ') (*(padtmp++)) = pad;
       format_append_string(sc, fdat, tmp, nlen, port);
@@ -36040,13 +36040,13 @@ static void format_number(s7_scheme *sc, format_data_t *fdat, int32_t radix, s7_
     {
 #if (!WITH_GMP)
       if (radix == 10)
-	tmp = number_to_string_base_10(sc, car(fdat->args), width, precision, float_choice, &nlen, P_WRITE);
+        tmp = number_to_string_base_10(sc, car(fdat->args), width, precision, float_choice, &nlen, P_WRITE);
       else
 #endif
-	{
-	  b = number_to_string_with_radix(sc, car(fdat->args), radix, width, precision, float_choice, &nlen);
-	  tmp = (char *)block_data(b);
-	}
+        {
+          b = number_to_string_with_radix(sc, car(fdat->args), radix, width, precision, float_choice, &nlen);
+          tmp = (char *)block_data(b);
+        }
       format_append_string(sc, fdat, tmp, nlen, port);
       if ((WITH_GMP) || (radix != 10)) liberate(sc, b);
     }
@@ -36069,17 +36069,17 @@ static void format_ordinal_number(s7_scheme *sc, format_data_t *fdat, s7_pointer
       format_append_string(sc, fdat, tmp, nlen, port);
       num = num % 100;
       if ((num >= 11) && (num <= 13))
-	format_append_string(sc, fdat, "th", 2, port);
+        format_append_string(sc, fdat, "th", 2, port);
       else
-	{
-	  num = num % 10;
-	  if (num == 1) format_append_string(sc, fdat, "st", 2, port);
-	  else
-	    if (num == 2) format_append_string(sc, fdat, "nd", 2, port);
-	    else
-	      if (num == 3) format_append_string(sc, fdat, "rd", 2, port);
-	      else format_append_string(sc, fdat, "th", 2, port);
-	}}
+        {
+          num = num % 10;
+          if (num == 1) format_append_string(sc, fdat, "st", 2, port);
+          else
+            if (num == 2) format_append_string(sc, fdat, "nd", 2, port);
+            else
+              if (num == 3) format_append_string(sc, fdat, "rd", 2, port);
+              else format_append_string(sc, fdat, "th", 2, port);
+        }}
   fdat->args = cdr(fdat->args);
   fdat->ctr++;
 }
@@ -36090,15 +36090,15 @@ static s7_int format_nesting(const char *str, char opener, char closer, s7_int s
   for (s7_int k = start + 2; k < end; k++)
     if (str[k] == '~')
       {
-	if (str[k + 1] == closer)
-	  {
-	    nesting--;
-	    if (nesting == 0)
-	      return(k - start - 1);
-	  }
-	else
-	  if (str[k + 1] == opener)
-	    nesting++;
+        if (str[k + 1] == closer)
+          {
+            nesting--;
+            if (nesting == 0)
+              return(k - start - 1);
+          }
+        else
+          if (str[k + 1] == opener)
+            nesting++;
       }
   return(-1);
 }
@@ -36151,13 +36151,13 @@ static s7_int format_numeric_arg(s7_scheme *sc, const char *str, s7_int str_len,
   if (width < 0)
     {
       if (str[old_i - 1] != ',') /* need branches here, not if-expr because format_error creates the permanent string */
-	format_error_nr(sc, "width is negative?", 18, str, fdat->args, fdat);
+        format_error_nr(sc, "width is negative?", 18, str, fdat->args, fdat);
       format_error_nr(sc, "precision is negative?", 22, str, fdat->args, fdat);
     }
   if (width > sc->max_format_length)
     {
       if (str[old_i - 1] != ',')
-	format_error_nr(sc, "width is too big", 16, str, fdat->args, fdat);
+        format_error_nr(sc, "width is too big", 16, str, fdat->args, fdat);
       format_error_nr(sc, "precision is too big", 20, str, fdat->args, fdat);
     }
   return(width);
@@ -36186,9 +36186,9 @@ static format_data_t *open_format_data(s7_scheme *sc)
   else
     {
       if (fdat->port)
-	close_format_port(sc, fdat->port);
+        close_format_port(sc, fdat->port);
       if (fdat->strport)
-	close_format_port(sc, fdat->strport);
+        close_format_port(sc, fdat->strport);
     }
   fdat->port = NULL;
   fdat->strport = NULL;
@@ -36212,7 +36212,7 @@ static bool is_one_or_big_one(s7_scheme *sc, s7_pointer p)
 static s7_pointer object_to_list(s7_scheme *sc, s7_pointer obj);
 
 static s7_pointer format_to_port_1(s7_scheme *sc, s7_pointer port, const char *str, s7_pointer args,
-				   s7_pointer *next_arg, bool with_result, bool columnized, s7_int len, s7_pointer orig_str)
+                                   s7_pointer *next_arg, bool with_result, bool columnized, s7_int len, s7_pointer orig_str)
 {
   s7_int i, str_len;
   format_data_t *fdat;
@@ -36222,12 +36222,12 @@ static s7_pointer format_to_port_1(s7_scheme *sc, s7_pointer port, const char *s
     {
       str_len = safe_strlen(str);
       if (str_len == 0)
-	{
-	  if (is_not_null(args))
-	    error_nr(sc, sc->format_error_symbol,
-		     set_elist_2(sc, wrap_string(sc, "format control string is null, but there are arguments: ~S", 58), args));
-	  return(nil_string);
-	}}
+        {
+          if (is_not_null(args))
+            error_nr(sc, sc->format_error_symbol,
+                     set_elist_2(sc, wrap_string(sc, "format control string is null, but there are arguments: ~S", 58), args));
+          return(nil_string);
+        }}
   else str_len = len;
 
   fdat = open_format_data(sc);
@@ -36245,458 +36245,458 @@ static s7_pointer format_to_port_1(s7_scheme *sc, s7_pointer port, const char *s
   for (i = 0; i < str_len - 1; i++)
     {
       if ((uint8_t)(str[i]) == (uint8_t)'~')
-	{
-	  use_write_t use_write;
-	  switch (str[i + 1])
-	    {
-	    case '%':                           /* -------- newline -------- */
-	      /* sbcl apparently accepts numeric args here (including 0) */
-	      if ((port_data(port)) &&
-		  (port_position(port) < port_data_size(port)))
-		{
-		  port_data(port)[port_position(port)++] = '\n';
-		  sc->format_column = 0;
-		}
-	      else format_append_newline(sc, port);
-	      i++;
-	      break;
-
-	    case '&':                           /* -------- conditional newline -------- */
-	      /* this only works if all output goes through format -- display/write for example do not update format_column */
-	      if (sc->format_column > 0)
-		format_append_newline(sc, port);
-	      i++;
-	      break;
-
-	    case '~':                           /* -------- tilde -------- */
-	      format_append_char(sc, '~', port);
-	      i++;
-	      break;
-
-	    case '\n':                          /* -------- trim white-space --------  so (format #f "hiho~\n") -> "hiho"! */
-	      for (i = i + 2; i <str_len - 1; i++)
-		if (!(white_space[(uint8_t)(str[i])]))
-		  {
-		    i--;
-		    break;
-		  }
-	      break;
-
-	    case '*':                           /* -------- ignore arg -------- */
-	      i++;
-	      if (is_null(fdat->args))          /* (format #f "~*~A") */
-		format_error_nr(sc, "can't skip argument!", 20, str, args, fdat);
-	      fdat->args = cdr(fdat->args);
-	      break;
-
-	    case '|':                           /* -------- exit if args nil or ctr > (*s7* 'print-length) -------- */
-	      if ((is_pair(fdat->args)) &&
-		  (fdat->ctr >= sc->print_length))
-		{
-		  format_append_string(sc, fdat, " ...", 4, port);
-		  fdat->args = sc->nil;
-		}
-	      /* fall through */
-
-	    case '^':                           /* -------- exit -------- */
-	      if (is_null(fdat->args))
-		{
-		  i = str_len;
-		  goto ALL_DONE;
-		}
-	      i++;
-	      break;
-
-	    case '@':                           /* -------- plural, 'y' or 'ies' -------- */
-	      i += 2;
-	      if ((str[i] != 'P') && (str[i] != 'p'))
-		format_error_nr(sc, "unknown '@' directive", 21, str, args, fdat);
-	      if (!is_pair(fdat->args))
-		format_error_nr(sc, "'@' directive argument missing", 30, str, args, fdat);
-	      if (!is_real(car(fdat->args)))        /* CL accepts non numbers here */
-		format_error_nr(sc, "'@P' directive argument is not a real number", 44, str, args, fdat);
-
-	      if (!is_one_or_big_one(sc, car(fdat->args)))
-		format_append_string(sc, fdat, "ies", 3, port);
-	      else format_append_char(sc, 'y', port);
-
-	      fdat->args = cdr(fdat->args);
-	      break;
-
-	    case 'P': case 'p':                 /* -------- plural in 's' -------- */
-	      if (!is_pair(fdat->args))
-		format_error_nr(sc, "'P' directive argument missing", 30, str, args, fdat);
-	      if (!is_real(car(fdat->args)))
-		format_error_nr(sc, "'P' directive argument is not a real number", 43, str, args, fdat);
-	      if (!is_one_or_big_one(sc, car(fdat->args)))
-		format_append_char(sc, 's', port);
-	      i++;
-	      fdat->args = cdr(fdat->args);
-	      break;
-
-	    case '{':                           /* -------- iteration -------- */
-	      {
-		s7_int curly_len;
-
-		if (is_null(fdat->args))
-		  format_error_nr(sc, "missing argument", 16, str, args, fdat);
-
-		if ((is_pair(car(fdat->args))) &&               /* any sequence is possible here */
-		    (s7_list_length(sc, car(fdat->args)) < 0))  /* (format #f "~{~a~e~}" (cons 1 2)) */
-		  format_error_nr(sc, "~{ argument is a dotted list", 28, str, args, fdat);
-
-		curly_len = format_nesting(str, '{', '}', i, str_len - 1);
-
-		if (curly_len == -1)
-		  format_error_nr(sc, "'{' directive, but no matching '}'", 34, str, args, fdat);
-		if (curly_len == 1)
-		  format_error_nr(sc, "~{~}' doesn't consume any arguments!", 36, str, args, fdat);
-
-		/* what about cons's here?  I can't see any way to specify the car or cdr of a cons within the format string */
-		if (is_not_null(car(fdat->args)))               /* (format #f "~{~A ~}" ()) -> "" */
-		  {
-		    s7_pointer curly_arg = object_to_list(sc, car(fdat->args)); /* if a pair (or non-sequence), this simply returns the original */
-		    /* perhaps use an iterator here -- rootlet->list is expensive! */
-		    if (is_pair(curly_arg))                    /* (format #f "~{~A ~}" #()) -> "" */
-		      {
-			char *curly_str = NULL;                /* this is the local (nested) format control string */
-			s7_pointer cycle_arg;
-
-			fdat->curly_arg = curly_arg;
-			if (curly_len > fdat->curly_len)
-			  {
-			    if (fdat->curly_str) free(fdat->curly_str);
-			    fdat->curly_len = curly_len;
-			    fdat->curly_str = (char *)Malloc(curly_len);
-			  }
-			curly_str = fdat->curly_str;
-			memcpy((void *)curly_str, (const void *)(str + i + 2), curly_len - 1);
-			curly_str[curly_len - 1] = '\0';
-
-			if ((sc->format_depth < sc->num_fdats - 1) &&
-			    (sc->fdats[sc->format_depth + 1]))
-			  sc->fdats[sc->format_depth + 1]->ctr = 0;
-
-			/* it's not easy to use an iterator here instead of a list (so object->list isn't needed above),
-			 *   because the curly brackets may enclose multiple arguments -- we would need to use
-			 *   iterators throughout this function.
-			 */
-			cycle_arg = curly_arg;
-			while (is_pair(curly_arg))
-			  {
-			    s7_pointer new_arg = sc->nil;
-			    format_to_port_1(sc, port, curly_str, curly_arg, &new_arg, false, columnized, curly_len - 1, NULL);
-			    if (curly_arg == new_arg)
-			      {
-				if (cdr(curly_arg) == curly_arg) break;
-				fdat->curly_arg = sc->nil;
-				format_error_nr(sc, "'{...}' doesn't consume any arguments!", 38, str, args, fdat);
-			      }
-			    curly_arg = new_arg;
-			    if ((!is_pair(curly_arg)) || (curly_arg == cycle_arg))
-			      break;
-			    cycle_arg = cdr(cycle_arg);
-			    format_to_port_1(sc, port, curly_str, curly_arg, &new_arg, false, columnized, curly_len - 1, NULL);
-			    curly_arg = new_arg;
-			  }
-			fdat->curly_arg = sc->nil;
-		      }
-		    else
-		      if (!is_null(curly_arg))
-			format_error_nr(sc, "'{' directive argument should be a list or something we can turn into a list", 76, str, args, fdat);
-		  }
-		i += (curly_len + 2); /* jump past the ending '}' too */
-		fdat->args = cdr(fdat->args);
-		fdat->ctr++;
-	      }
-	      break;
-
-	    case '}':
-	      format_error_nr(sc, "unmatched '}'", 13, str, args, fdat);
-
-	    case '$':
-	      use_write = P_CODE; /* affects when symbols but not keywords are quoted (symbol_to_port and hash_table_to_port) */
-	      goto OBJSTR;
-
-	    case 'W': case 'w':
-	      use_write = P_READABLE;
-	      goto OBJSTR;
-
-	    case 'S': case 's':
-	      use_write = P_WRITE;
-	      goto OBJSTR;
-
-	    case 'A': case 'a':
-	      use_write = P_DISPLAY;
-	    OBJSTR:                        /* object->string */
-	      {
-		s7_pointer obj, strport;
-		if (is_null(fdat->args))
-		  format_error_nr(sc, "missing argument", 16, str, args, fdat);
-		i++;
-		obj = car(fdat->args);
-		if ((use_write == P_READABLE) ||
-		    (!has_active_methods(sc, obj)) ||
-		    (!format_method(sc, (const char *)(str + i), fdat, port)))
-		  {
-		    bool old_openlets = sc->has_openlets;
-		    /* for the column check, we need to know the length of the object->string output */
-		    if (columnized)
-		      {
-			strport = open_format_port(sc);
-			fdat->strport = strport;
-		      }
-		    else strport = port;
-		    if (use_write == P_READABLE)
-		      sc->has_openlets = false;
-		    object_out(sc, obj, strport, use_write);
-		    if (use_write == P_READABLE)
-		      sc->has_openlets = old_openlets;
-		    if (columnized)
-		      {
-			if (port_position(strport) >= port_data_size(strport))
-			  resize_port_data(sc, strport, port_data_size(strport) * 2);
-			port_data(strport)[port_position(strport)] = '\0';
-			if (port_position(strport) > 0)
-			  format_append_string(sc, fdat, (const char *)port_data(strport), port_position(strport), port);
-			close_format_port(sc, strport);
-			fdat->strport = NULL;
-		      }
-		    fdat->args = cdr(fdat->args);
-		    fdat->ctr++;
-		  }}
-	      break;
-
-	      /* -------- numeric args -------- */
-	    case ':':
-	      i += 2;
-	      if ((str[i] != 'D') && (str[i] != 'd'))
-		format_error_nr(sc, "unknown ':' directive", 21, str, args, fdat);
-	      if (!is_pair(fdat->args))
-		format_error_nr(sc, "':D' directive argument missing", 31, str, args, fdat);
-	      if (!s7_is_integer(car(fdat->args)))
-		format_error_nr(sc, "':D' directive argument is not an integer", 41, str, args, fdat);
-	      if (s7_integer_clamped_if_gmp(sc, car(fdat->args)) < 0)
-		format_error_nr(sc, "':D' directive argument can't be negative", 41, str, args, fdat);
-	      format_ordinal_number(sc, fdat, port);
-	      break;
-
-	    case '0': case '1': case '2': case '3': case '4': case '5':
-	    case '6': case '7': case '8': case '9': case ',':
-	    case 'N': case 'n':
-
-	    case 'B': case 'b':
-	    case 'D': case 'd':
-	    case 'E': case 'e':
-	    case 'F': case 'f':
-	    case 'G': case 'g':
-	    case 'O': case 'o':
-	    case 'X': case 'x':
-
-	    case 'T': case 't':
-	    case 'C': case 'c':
-	      {
-		s7_int width = -1, precision = -1;
-		char pad = ' ';
-		i++;                                      /* str[i] == '~' */
-
-		if (isdigit((int32_t)(str[i])))
-		  width = format_numeric_arg(sc, str, str_len, fdat, &i);
-		else
-		  if ((str[i] == 'N') || (str[i] == 'n'))
-		    {
-		      i++;
-		      width = format_n_arg(sc, str, fdat, args);
-		    }
-		if (str[i] == ',')
-		  {
-		    i++;                                  /* is (format #f "~12,12D" 1) an error?  The precision (or is it the width?) has no use here */
-		    if (isdigit((int32_t)(str[i])))
-		      precision = format_numeric_arg(sc, str, str_len, fdat, &i);
-		    else
-		      if ((str[i] == 'N') || (str[i] == 'n'))
-			{
-			  i++;
-			  precision = format_n_arg(sc, str, fdat, args);
-			}
-		      else
-			if (str[i] == '\'')              /* (format #f "~12,'xD" 1) -> "xxxxxxxxxxx1" */
-			  {
-			    pad = str[i + 1];
-			    i += 2;
-			    if (i >= str_len)            /* (format #f "~,'") */
-			      format_error_nr(sc, "incomplete numeric argument", 27, str, args, fdat);
-			  }}  /* is (let ((str "~12,'xD")) (set! (str 5) #\null) (format #f str 1)) an error? */
-
-		switch (str[i])
-		  {
-		    /* -------- pad to column --------
-		     *   are columns numbered from 1 or 0?  there seems to be disagreement about this directive, does "space over to" mean including?
-		     */
-		  case 'T': case 't':
-		    if (width == -1) width = 0;
-		    if (precision == -1) precision = 0;
-		    if ((width > 0) || (precision > 0))         /* (format #f "a~8Tb") */
-		      {
-			/* (length (substring (format #f "~%~10T.") 1)) == (length (format #f "~10T."))
-			 * (length (substring (format #f "~%-~10T.~%") 1)) == (length (format #f "-~10T.~%"))
-			 */
-			if (precision > 0)
-			  {
-			    int32_t mult = (int32_t)(ceil((s7_double)(sc->format_column + 1 - width) / (s7_double)precision)); /* CLtL2 ("least positive int") */
-			    if (mult < 1) mult = 1;
-			    width += (precision * mult);
-			  }
-			width -= (sc->format_column + 1);
-			if (width > 0)
-			  format_append_chars(sc, fdat, pad, width, port);
-		      }
-		    break;
-
-		  case 'C': case 'c':
-		    {
-		      s7_pointer obj;
-
-		      if (is_null(fdat->args))
-			format_error_nr(sc, "~~C: missing argument", 21, str, args, fdat);
-		      /* the "~~" here and below protects against "~C" being treated as a directive */
-		      obj = car(fdat->args);
-		      if (!is_character(obj))
-			{
-			  if (!format_method(sc, (const char *)(str + i), fdat, port)) /* i stepped forward above */
-			    format_error_nr(sc, "'C' directive requires a character argument", 43, str, args, fdat);
-			}
-		      else
-			{
-			  /* here use_write is false, so we just add the char, not its name */
-			  if (width == -1)
-			    format_append_char(sc, character(obj), port);
-			  else
-			    if (width > 0)
-			      format_append_chars(sc, fdat, character(obj), width, port);
-
-			  fdat->args = cdr(fdat->args);
-			  fdat->ctr++;
-			}}
-		    break;
-
-		    /* -------- numbers -------- */
-		  case 'F': case 'f':
-		    if (is_null(fdat->args))
-		      format_error_nr(sc, "~~F: missing argument", 21, str, args, fdat);
-		    if (!(is_number(car(fdat->args))))
-		      {
-			if (!format_method(sc, (const char *)(str + i), fdat, port))
-			  format_error_nr(sc, "~~F: numeric argument required", 30, str, args, fdat);
-		      }
-		    else format_number(sc, fdat, 10, width, precision, 'f', pad, port);
-		    break;
-
-		  case 'G': case 'g':
-		    if (is_null(fdat->args))
-		      format_error_nr(sc, "~~G: missing argument", 21, str, args, fdat);
-		    if (!(is_number(car(fdat->args))))
-		      {
-			if (!format_method(sc, (const char *)(str + i), fdat, port))
-			  format_error_nr(sc, "~~G: numeric argument required", 30, str, args, fdat);
-		      }
-		    else format_number(sc, fdat, 10, width, precision, 'g', pad, port);
-		    break;
-
-		  case 'E': case 'e':
-		    if (is_null(fdat->args))
-		      format_error_nr(sc, "~~E: missing argument", 21, str, args, fdat);
-		    if (!(is_number(car(fdat->args))))
-		      {
-			if (!format_method(sc, (const char *)(str + i), fdat, port))
-			  format_error_nr(sc, "~~E: numeric argument required", 30, str, args, fdat);
-		      }
-		    else format_number(sc, fdat, 10, width, precision, 'e', pad, port);
-		    break;
-
-		    /* how to handle non-integer arguments in the next 4 cases?  clisp just returns
-		     *   the argument: (format nil "~X" 1.25) -> "1.25" which is perverse (ClTl2 p 581:
-		     *   "if arg is not an integer, it is printed in ~A format and decimal base")!!
-		     *   I think I'll use the type of the number to choose the output format.
-		     */
-		  case 'D': case 'd':
-		    if (is_null(fdat->args))
-		      format_error_nr(sc, "~~D: missing argument", 21, str, args, fdat);
-		    if (!(is_number(car(fdat->args))))
-		      {
-			/* (let () (require mockery.scm) (format #f "~D" ((*mock-number* 'mock-number) 123)))
-			 *    port here is a string-port, str has the width/precision data if the caller wants it,
-			 *    args is the current arg.  But format_number handles fdat->args and so on, so
-			 *    I think I'll pass the format method the current control string (str), the
-			 *    current object (car(fdat->args)), and the arglist (args), and assume it will
-			 *    return a (scheme) string.
-			 */
-			if (!format_method(sc, (const char *)(str + i), fdat, port))
-			  format_error_nr(sc, "~~D: numeric argument required", 30, str, args, fdat);
-		      }
-		    else format_number(sc, fdat, 10, width, precision, 'd', pad, port);
-		    break;
-
-		  case 'O': case 'o':
-		    if (is_null(fdat->args))
-		      format_error_nr(sc, "~~O: missing argument", 21, str, args, fdat);
-		    if (!(is_number(car(fdat->args))))
-		      {
-			if (!format_method(sc, (const char *)(str + i), fdat, port))
-			  format_error_nr(sc, "~~O: numeric argument required", 30, str, args, fdat);
-		      }
-		    else format_number(sc, fdat, 8, width, precision, 'o', pad, port);
-		    break;
-
-		  case 'X': case 'x':
-		    if (is_null(fdat->args))
-		      format_error_nr(sc, "~~X: missing argument", 21, str, args, fdat);
-		    if (!(is_number(car(fdat->args))))
-		      {
-			if (!format_method(sc, (const char *)(str + i), fdat, port))
-			  format_error_nr(sc, "~~X: numeric argument required", 30, str, args, fdat);
-		      }
-		    else format_number(sc, fdat, 16, width, precision, 'x', pad, port);
-		    break;
-
-		  case 'B': case 'b':
-		    if (is_null(fdat->args))
-		      format_error_nr(sc, "~~B: missing argument", 21, str, args, fdat);
-		    if (!(is_number(car(fdat->args))))
-		      {
-			if (!format_method(sc, (const char *)(str + i), fdat, port))
-			  format_error_nr(sc, "~~B: numeric argument required", 30, str, args, fdat);
-		      }
-		    else format_number(sc, fdat, 2, width, precision, 'b', pad, port);
-		    break;
-
-		  default:
-		    if (width > 0)
-		      format_error_nr(sc, "unused numeric argument", 23, str, args, fdat);
-		    format_error_nr(sc, "unimplemented format directive", 30, str, args, fdat);
-		  }}
-	      break;
-
-	    default:
-	      format_error_nr(sc, "unimplemented format directive", 30, str, args, fdat);
-	    }}
+        {
+          use_write_t use_write;
+          switch (str[i + 1])
+            {
+            case '%':                           /* -------- newline -------- */
+              /* sbcl apparently accepts numeric args here (including 0) */
+              if ((port_data(port)) &&
+                  (port_position(port) < port_data_size(port)))
+                {
+                  port_data(port)[port_position(port)++] = '\n';
+                  sc->format_column = 0;
+                }
+              else format_append_newline(sc, port);
+              i++;
+              break;
+
+            case '&':                           /* -------- conditional newline -------- */
+              /* this only works if all output goes through format -- display/write for example do not update format_column */
+              if (sc->format_column > 0)
+                format_append_newline(sc, port);
+              i++;
+              break;
+
+            case '~':                           /* -------- tilde -------- */
+              format_append_char(sc, '~', port);
+              i++;
+              break;
+
+            case '\n':                          /* -------- trim white-space --------  so (format #f "hiho~\n") -> "hiho"! */
+              for (i = i + 2; i <str_len - 1; i++)
+                if (!(white_space[(uint8_t)(str[i])]))
+                  {
+                    i--;
+                    break;
+                  }
+              break;
+
+            case '*':                           /* -------- ignore arg -------- */
+              i++;
+              if (is_null(fdat->args))          /* (format #f "~*~A") */
+                format_error_nr(sc, "can't skip argument!", 20, str, args, fdat);
+              fdat->args = cdr(fdat->args);
+              break;
+
+            case '|':                           /* -------- exit if args nil or ctr > (*s7* 'print-length) -------- */
+              if ((is_pair(fdat->args)) &&
+                  (fdat->ctr >= sc->print_length))
+                {
+                  format_append_string(sc, fdat, " ...", 4, port);
+                  fdat->args = sc->nil;
+                }
+              /* fall through */
+
+            case '^':                           /* -------- exit -------- */
+              if (is_null(fdat->args))
+                {
+                  i = str_len;
+                  goto ALL_DONE;
+                }
+              i++;
+              break;
+
+            case '@':                           /* -------- plural, 'y' or 'ies' -------- */
+              i += 2;
+              if ((str[i] != 'P') && (str[i] != 'p'))
+                format_error_nr(sc, "unknown '@' directive", 21, str, args, fdat);
+              if (!is_pair(fdat->args))
+                format_error_nr(sc, "'@' directive argument missing", 30, str, args, fdat);
+              if (!is_real(car(fdat->args)))        /* CL accepts non numbers here */
+                format_error_nr(sc, "'@P' directive argument is not a real number", 44, str, args, fdat);
+
+              if (!is_one_or_big_one(sc, car(fdat->args)))
+                format_append_string(sc, fdat, "ies", 3, port);
+              else format_append_char(sc, 'y', port);
+
+              fdat->args = cdr(fdat->args);
+              break;
+
+            case 'P': case 'p':                 /* -------- plural in 's' -------- */
+              if (!is_pair(fdat->args))
+                format_error_nr(sc, "'P' directive argument missing", 30, str, args, fdat);
+              if (!is_real(car(fdat->args)))
+                format_error_nr(sc, "'P' directive argument is not a real number", 43, str, args, fdat);
+              if (!is_one_or_big_one(sc, car(fdat->args)))
+                format_append_char(sc, 's', port);
+              i++;
+              fdat->args = cdr(fdat->args);
+              break;
+
+            case '{':                           /* -------- iteration -------- */
+              {
+                s7_int curly_len;
+
+                if (is_null(fdat->args))
+                  format_error_nr(sc, "missing argument", 16, str, args, fdat);
+
+                if ((is_pair(car(fdat->args))) &&               /* any sequence is possible here */
+                    (s7_list_length(sc, car(fdat->args)) < 0))  /* (format #f "~{~a~e~}" (cons 1 2)) */
+                  format_error_nr(sc, "~{ argument is a dotted list", 28, str, args, fdat);
+
+                curly_len = format_nesting(str, '{', '}', i, str_len - 1);
+
+                if (curly_len == -1)
+                  format_error_nr(sc, "'{' directive, but no matching '}'", 34, str, args, fdat);
+                if (curly_len == 1)
+                  format_error_nr(sc, "~{~}' doesn't consume any arguments!", 36, str, args, fdat);
+
+                /* what about cons's here?  I can't see any way to specify the car or cdr of a cons within the format string */
+                if (is_not_null(car(fdat->args)))               /* (format #f "~{~A ~}" ()) -> "" */
+                  {
+                    s7_pointer curly_arg = object_to_list(sc, car(fdat->args)); /* if a pair (or non-sequence), this simply returns the original */
+                    /* perhaps use an iterator here -- rootlet->list is expensive! */
+                    if (is_pair(curly_arg))                    /* (format #f "~{~A ~}" #()) -> "" */
+                      {
+                        char *curly_str = NULL;                /* this is the local (nested) format control string */
+                        s7_pointer cycle_arg;
+
+                        fdat->curly_arg = curly_arg;
+                        if (curly_len > fdat->curly_len)
+                          {
+                            if (fdat->curly_str) free(fdat->curly_str);
+                            fdat->curly_len = curly_len;
+                            fdat->curly_str = (char *)Malloc(curly_len);
+                          }
+                        curly_str = fdat->curly_str;
+                        memcpy((void *)curly_str, (const void *)(str + i + 2), curly_len - 1);
+                        curly_str[curly_len - 1] = '\0';
+
+                        if ((sc->format_depth < sc->num_fdats - 1) &&
+                            (sc->fdats[sc->format_depth + 1]))
+                          sc->fdats[sc->format_depth + 1]->ctr = 0;
+
+                        /* it's not easy to use an iterator here instead of a list (so object->list isn't needed above),
+                         *   because the curly brackets may enclose multiple arguments -- we would need to use
+                         *   iterators throughout this function.
+                         */
+                        cycle_arg = curly_arg;
+                        while (is_pair(curly_arg))
+                          {
+                            s7_pointer new_arg = sc->nil;
+                            format_to_port_1(sc, port, curly_str, curly_arg, &new_arg, false, columnized, curly_len - 1, NULL);
+                            if (curly_arg == new_arg)
+                              {
+                                if (cdr(curly_arg) == curly_arg) break;
+                                fdat->curly_arg = sc->nil;
+                                format_error_nr(sc, "'{...}' doesn't consume any arguments!", 38, str, args, fdat);
+                              }
+                            curly_arg = new_arg;
+                            if ((!is_pair(curly_arg)) || (curly_arg == cycle_arg))
+                              break;
+                            cycle_arg = cdr(cycle_arg);
+                            format_to_port_1(sc, port, curly_str, curly_arg, &new_arg, false, columnized, curly_len - 1, NULL);
+                            curly_arg = new_arg;
+                          }
+                        fdat->curly_arg = sc->nil;
+                      }
+                    else
+                      if (!is_null(curly_arg))
+                        format_error_nr(sc, "'{' directive argument should be a list or something we can turn into a list", 76, str, args, fdat);
+                  }
+                i += (curly_len + 2); /* jump past the ending '}' too */
+                fdat->args = cdr(fdat->args);
+                fdat->ctr++;
+              }
+              break;
+
+            case '}':
+              format_error_nr(sc, "unmatched '}'", 13, str, args, fdat);
+
+            case '$':
+              use_write = P_CODE; /* affects when symbols but not keywords are quoted (symbol_to_port and hash_table_to_port) */
+              goto OBJSTR;
+
+            case 'W': case 'w':
+              use_write = P_READABLE;
+              goto OBJSTR;
+
+            case 'S': case 's':
+              use_write = P_WRITE;
+              goto OBJSTR;
+
+            case 'A': case 'a':
+              use_write = P_DISPLAY;
+            OBJSTR:                        /* object->string */
+              {
+                s7_pointer obj, strport;
+                if (is_null(fdat->args))
+                  format_error_nr(sc, "missing argument", 16, str, args, fdat);
+                i++;
+                obj = car(fdat->args);
+                if ((use_write == P_READABLE) ||
+                    (!has_active_methods(sc, obj)) ||
+                    (!format_method(sc, (const char *)(str + i), fdat, port)))
+                  {
+                    bool old_openlets = sc->has_openlets;
+                    /* for the column check, we need to know the length of the object->string output */
+                    if (columnized)
+                      {
+                        strport = open_format_port(sc);
+                        fdat->strport = strport;
+                      }
+                    else strport = port;
+                    if (use_write == P_READABLE)
+                      sc->has_openlets = false;
+                    object_out(sc, obj, strport, use_write);
+                    if (use_write == P_READABLE)
+                      sc->has_openlets = old_openlets;
+                    if (columnized)
+                      {
+                        if (port_position(strport) >= port_data_size(strport))
+                          resize_port_data(sc, strport, port_data_size(strport) * 2);
+                        port_data(strport)[port_position(strport)] = '\0';
+                        if (port_position(strport) > 0)
+                          format_append_string(sc, fdat, (const char *)port_data(strport), port_position(strport), port);
+                        close_format_port(sc, strport);
+                        fdat->strport = NULL;
+                      }
+                    fdat->args = cdr(fdat->args);
+                    fdat->ctr++;
+                  }}
+              break;
+
+              /* -------- numeric args -------- */
+            case ':':
+              i += 2;
+              if ((str[i] != 'D') && (str[i] != 'd'))
+                format_error_nr(sc, "unknown ':' directive", 21, str, args, fdat);
+              if (!is_pair(fdat->args))
+                format_error_nr(sc, "':D' directive argument missing", 31, str, args, fdat);
+              if (!s7_is_integer(car(fdat->args)))
+                format_error_nr(sc, "':D' directive argument is not an integer", 41, str, args, fdat);
+              if (s7_integer_clamped_if_gmp(sc, car(fdat->args)) < 0)
+                format_error_nr(sc, "':D' directive argument can't be negative", 41, str, args, fdat);
+              format_ordinal_number(sc, fdat, port);
+              break;
+
+            case '0': case '1': case '2': case '3': case '4': case '5':
+            case '6': case '7': case '8': case '9': case ',':
+            case 'N': case 'n':
+
+            case 'B': case 'b':
+            case 'D': case 'd':
+            case 'E': case 'e':
+            case 'F': case 'f':
+            case 'G': case 'g':
+            case 'O': case 'o':
+            case 'X': case 'x':
+
+            case 'T': case 't':
+            case 'C': case 'c':
+              {
+                s7_int width = -1, precision = -1;
+                char pad = ' ';
+                i++;                                      /* str[i] == '~' */
+
+                if (isdigit((int32_t)(str[i])))
+                  width = format_numeric_arg(sc, str, str_len, fdat, &i);
+                else
+                  if ((str[i] == 'N') || (str[i] == 'n'))
+                    {
+                      i++;
+                      width = format_n_arg(sc, str, fdat, args);
+                    }
+                if (str[i] == ',')
+                  {
+                    i++;                                  /* is (format #f "~12,12D" 1) an error?  The precision (or is it the width?) has no use here */
+                    if (isdigit((int32_t)(str[i])))
+                      precision = format_numeric_arg(sc, str, str_len, fdat, &i);
+                    else
+                      if ((str[i] == 'N') || (str[i] == 'n'))
+                        {
+                          i++;
+                          precision = format_n_arg(sc, str, fdat, args);
+                        }
+                      else
+                        if (str[i] == '\'')              /* (format #f "~12,'xD" 1) -> "xxxxxxxxxxx1" */
+                          {
+                            pad = str[i + 1];
+                            i += 2;
+                            if (i >= str_len)            /* (format #f "~,'") */
+                              format_error_nr(sc, "incomplete numeric argument", 27, str, args, fdat);
+                          }}  /* is (let ((str "~12,'xD")) (set! (str 5) #\null) (format #f str 1)) an error? */
+
+                switch (str[i])
+                  {
+                    /* -------- pad to column --------
+                     *   are columns numbered from 1 or 0?  there seems to be disagreement about this directive, does "space over to" mean including?
+                     */
+                  case 'T': case 't':
+                    if (width == -1) width = 0;
+                    if (precision == -1) precision = 0;
+                    if ((width > 0) || (precision > 0))         /* (format #f "a~8Tb") */
+                      {
+                        /* (length (substring (format #f "~%~10T.") 1)) == (length (format #f "~10T."))
+                         * (length (substring (format #f "~%-~10T.~%") 1)) == (length (format #f "-~10T.~%"))
+                         */
+                        if (precision > 0)
+                          {
+                            int32_t mult = (int32_t)(ceil((s7_double)(sc->format_column + 1 - width) / (s7_double)precision)); /* CLtL2 ("least positive int") */
+                            if (mult < 1) mult = 1;
+                            width += (precision * mult);
+                          }
+                        width -= (sc->format_column + 1);
+                        if (width > 0)
+                          format_append_chars(sc, fdat, pad, width, port);
+                      }
+                    break;
+
+                  case 'C': case 'c':
+                    {
+                      s7_pointer obj;
+
+                      if (is_null(fdat->args))
+                        format_error_nr(sc, "~~C: missing argument", 21, str, args, fdat);
+                      /* the "~~" here and below protects against "~C" being treated as a directive */
+                      obj = car(fdat->args);
+                      if (!is_character(obj))
+                        {
+                          if (!format_method(sc, (const char *)(str + i), fdat, port)) /* i stepped forward above */
+                            format_error_nr(sc, "'C' directive requires a character argument", 43, str, args, fdat);
+                        }
+                      else
+                        {
+                          /* here use_write is false, so we just add the char, not its name */
+                          if (width == -1)
+                            format_append_char(sc, character(obj), port);
+                          else
+                            if (width > 0)
+                              format_append_chars(sc, fdat, character(obj), width, port);
+
+                          fdat->args = cdr(fdat->args);
+                          fdat->ctr++;
+                        }}
+                    break;
+
+                    /* -------- numbers -------- */
+                  case 'F': case 'f':
+                    if (is_null(fdat->args))
+                      format_error_nr(sc, "~~F: missing argument", 21, str, args, fdat);
+                    if (!(is_number(car(fdat->args))))
+                      {
+                        if (!format_method(sc, (const char *)(str + i), fdat, port))
+                          format_error_nr(sc, "~~F: numeric argument required", 30, str, args, fdat);
+                      }
+                    else format_number(sc, fdat, 10, width, precision, 'f', pad, port);
+                    break;
+
+                  case 'G': case 'g':
+                    if (is_null(fdat->args))
+                      format_error_nr(sc, "~~G: missing argument", 21, str, args, fdat);
+                    if (!(is_number(car(fdat->args))))
+                      {
+                        if (!format_method(sc, (const char *)(str + i), fdat, port))
+                          format_error_nr(sc, "~~G: numeric argument required", 30, str, args, fdat);
+                      }
+                    else format_number(sc, fdat, 10, width, precision, 'g', pad, port);
+                    break;
+
+                  case 'E': case 'e':
+                    if (is_null(fdat->args))
+                      format_error_nr(sc, "~~E: missing argument", 21, str, args, fdat);
+                    if (!(is_number(car(fdat->args))))
+                      {
+                        if (!format_method(sc, (const char *)(str + i), fdat, port))
+                          format_error_nr(sc, "~~E: numeric argument required", 30, str, args, fdat);
+                      }
+                    else format_number(sc, fdat, 10, width, precision, 'e', pad, port);
+                    break;
+
+                    /* how to handle non-integer arguments in the next 4 cases?  clisp just returns
+                     *   the argument: (format nil "~X" 1.25) -> "1.25" which is perverse (ClTl2 p 581:
+                     *   "if arg is not an integer, it is printed in ~A format and decimal base")!!
+                     *   I think I'll use the type of the number to choose the output format.
+                     */
+                  case 'D': case 'd':
+                    if (is_null(fdat->args))
+                      format_error_nr(sc, "~~D: missing argument", 21, str, args, fdat);
+                    if (!(is_number(car(fdat->args))))
+                      {
+                        /* (let () (require mockery.scm) (format #f "~D" ((*mock-number* 'mock-number) 123)))
+                         *    port here is a string-port, str has the width/precision data if the caller wants it,
+                         *    args is the current arg.  But format_number handles fdat->args and so on, so
+                         *    I think I'll pass the format method the current control string (str), the
+                         *    current object (car(fdat->args)), and the arglist (args), and assume it will
+                         *    return a (scheme) string.
+                         */
+                        if (!format_method(sc, (const char *)(str + i), fdat, port))
+                          format_error_nr(sc, "~~D: numeric argument required", 30, str, args, fdat);
+                      }
+                    else format_number(sc, fdat, 10, width, precision, 'd', pad, port);
+                    break;
+
+                  case 'O': case 'o':
+                    if (is_null(fdat->args))
+                      format_error_nr(sc, "~~O: missing argument", 21, str, args, fdat);
+                    if (!(is_number(car(fdat->args))))
+                      {
+                        if (!format_method(sc, (const char *)(str + i), fdat, port))
+                          format_error_nr(sc, "~~O: numeric argument required", 30, str, args, fdat);
+                      }
+                    else format_number(sc, fdat, 8, width, precision, 'o', pad, port);
+                    break;
+
+                  case 'X': case 'x':
+                    if (is_null(fdat->args))
+                      format_error_nr(sc, "~~X: missing argument", 21, str, args, fdat);
+                    if (!(is_number(car(fdat->args))))
+                      {
+                        if (!format_method(sc, (const char *)(str + i), fdat, port))
+                          format_error_nr(sc, "~~X: numeric argument required", 30, str, args, fdat);
+                      }
+                    else format_number(sc, fdat, 16, width, precision, 'x', pad, port);
+                    break;
+
+                  case 'B': case 'b':
+                    if (is_null(fdat->args))
+                      format_error_nr(sc, "~~B: missing argument", 21, str, args, fdat);
+                    if (!(is_number(car(fdat->args))))
+                      {
+                        if (!format_method(sc, (const char *)(str + i), fdat, port))
+                          format_error_nr(sc, "~~B: numeric argument required", 30, str, args, fdat);
+                      }
+                    else format_number(sc, fdat, 2, width, precision, 'b', pad, port);
+                    break;
+
+                  default:
+                    if (width > 0)
+                      format_error_nr(sc, "unused numeric argument", 23, str, args, fdat);
+                    format_error_nr(sc, "unimplemented format directive", 30, str, args, fdat);
+                  }}
+              break;
+
+            default:
+              format_error_nr(sc, "unimplemented format directive", 30, str, args, fdat);
+            }}
       else /* str[i] is not #\~ */
-	{
-	  const char *p = (char *)strchr((const char *)(str + i + 1), (int)'~');
-	  s7_int j = (p) ? p - str : str_len;
-	  s7_int new_len = j - i;
-
-	  if ((port_data(port)) &&
-	      ((port_position(port) + new_len) < port_data_size(port)))
-	    {
-	      memcpy((void *)(port_data(port) + port_position(port)), (const void *)(str + i), new_len);
-	      port_position(port) += new_len;
-	    }
-	  else port_write_string(port)(sc, (const char *)(str + i), new_len, port);
-	  fdat->loc += new_len;
-	  sc->format_column += new_len;
-	  i = j - 1;
-	}}
+        {
+          const char *p = (char *)strchr((const char *)(str + i + 1), (int)'~');
+          s7_int j = (p) ? p - str : str_len;
+          s7_int new_len = j - i;
+
+          if ((port_data(port)) &&
+              ((port_position(port) + new_len) < port_data_size(port)))
+            {
+              memcpy((void *)(port_data(port) + port_position(port)), (const void *)(str + i), new_len);
+              port_position(port) += new_len;
+            }
+          else port_write_string(port)(sc, (const char *)(str + i), new_len, port);
+          fdat->loc += new_len;
+          sc->format_column += new_len;
+          i = j - 1;
+        }}
 
  ALL_DONE:
   if (next_arg)
@@ -36708,7 +36708,7 @@ static s7_pointer format_to_port_1(s7_scheme *sc, s7_pointer port, const char *s
   if (i < str_len)
     {
       if (str[i] == '~')
-	format_error_nr(sc, "control string ends in tilde", 28, str, args, fdat);
+        format_error_nr(sc, "control string ends in tilde", 28, str, args, fdat);
       format_append_char(sc, str[i], port);
     }
   sc->format_depth--;
@@ -36716,22 +36716,22 @@ static s7_pointer format_to_port_1(s7_scheme *sc, s7_pointer port, const char *s
     {
       s7_pointer result;
       if ((is_output_port(deferred_port)) &&
-	  (port_position(port) > 0))
-	{
-	  if (port_position(port) < port_data_size(port))
-	    port_data(port)[port_position(port)] = '\0';
-	  port_write_string(deferred_port)(sc, (const char *)port_data(port), port_position(port), deferred_port);
-	}
+          (port_position(port) > 0))
+        {
+          if (port_position(port) < port_data_size(port))
+            port_data(port)[port_position(port)] = '\0';
+          port_write_string(deferred_port)(sc, (const char *)port_data(port), port_position(port), deferred_port);
+        }
       if (port_position(port) < port_data_size(port))
-	{
-	  block_t *block = inline_mallocate(sc, FORMAT_PORT_LENGTH);
-	  result = inline_block_to_string(sc, port_data_block(port), port_position(port));
-	  port_data_size(port) = FORMAT_PORT_LENGTH;
-	  port_data_block(port) = block;
-	  port_data(port) = (uint8_t *)(block_data(block));
-	  port_data(port)[0] = '\0';
-	  port_position(port) = 0;
-	}
+        {
+          block_t *block = inline_mallocate(sc, FORMAT_PORT_LENGTH);
+          result = inline_block_to_string(sc, port_data_block(port), port_position(port));
+          port_data_size(port) = FORMAT_PORT_LENGTH;
+          port_data_block(port) = block;
+          port_data(port) = (uint8_t *)(block_data(block));
+          port_data(port)[0] = '\0';
+          port_position(port) = 0;
+        }
       else result = make_string_with_length(sc, (char *)port_data(port), port_position(port));
       close_format_port(sc, port);
       fdat->port = NULL;
@@ -36745,21 +36745,21 @@ static bool is_columnizing(const char *str)  /* look for ~t ~,<int>T ~<int>,<int
   for (const char *p = (const char *)str; (*p);)
     if (*p++ == '~') /* this is faster than strchr */
       {
-	char c = *p++;
-	if ((c == 't') || (c == 'T')) return(true);
-	if (!c) return(false);
-	if ((c == ',') || ((c >= '0') && (c <= '9')) || (c == 'n') || (c == 'N'))
-	  {
-	    while (((c >= '0') && (c <= '9')) || (c == 'n') || (c == 'N')) c = *p++;
-	    if ((c == 't') || (c == 'T')) return(true);
-	    if (!c) return(false);                       /* ~,1 for example */
-	    if (c == ',')
-	      {
-		c = *p++;
-		while (((c >= '0') && (c <= '9')) || (c == 'n') || (c == 'N')) c = *p++;
-		if ((c == 't') || (c == 'T')) return(true);
-		if (!c) return(false);
-	      }}}
+        char c = *p++;
+        if ((c == 't') || (c == 'T')) return(true);
+        if (!c) return(false);
+        if ((c == ',') || ((c >= '0') && (c <= '9')) || (c == 'n') || (c == 'N'))
+          {
+            while (((c >= '0') && (c <= '9')) || (c == 'n') || (c == 'N')) c = *p++;
+            if ((c == 't') || (c == 'T')) return(true);
+            if (!c) return(false);                       /* ~,1 for example */
+            if (c == ',')
+              {
+                c = *p++;
+                while (((c >= '0') && (c <= '9')) || (c == 'n') || (c == 'N')) c = *p++;
+                if ((c == 't') || (c == 'T')) return(true);
+                if (!c) return(false);
+              }}}
   return(false);
 }
 
@@ -36792,19 +36792,19 @@ is #t, the string is also sent to the current-output-port."
     {
       pt = current_output_port(sc);          /* () -> (current-output-port) */
       if (pt == sc->F)                       /*   otherwise () -> #f so we get a returned string, which is confusing */
-	return(nil_string);                  /*   was #f 18-Mar-24 */
+        return(nil_string);                  /*   was #f 18-Mar-24 */
     }
   sc->format_column = 0;
   if (!((is_boolean(pt)) ||                  /* #f or #t */
-	((is_output_port(pt)) &&             /* (current-output-port) or call-with-open-file arg, etc */
-	 (!port_is_closed(pt)))))
+        ((is_output_port(pt)) &&             /* (current-output-port) or call-with-open-file arg, etc */
+         (!port_is_closed(pt)))))
     return(method_or_bust(sc, pt, sc->format_symbol, args, an_output_port_string, 1));
 
   str = cadr(args);
   if (!is_string(str))
     return(method_or_bust(sc, str, sc->format_symbol, args, sc->type_names[T_STRING], 2));
   return(format_to_port_1(sc, (pt == sc->T) ? current_output_port(sc) : pt,
-			  string_value(str), cddr(args), NULL, !is_output_port(pt), true, string_length(str), str));
+                          string_value(str), cddr(args), NULL, !is_output_port(pt), true, string_length(str), str));
 }
 
 const char *s7_format(s7_scheme *sc, s7_pointer args)
@@ -36833,12 +36833,12 @@ static s7_pointer g_format_just_control_string(s7_scheme *sc, s7_pointer args)
     {
       pt = current_output_port(sc);
       if (pt == sc->F)
-	return(nil_string);
+        return(nil_string);
     }
   if (pt == sc->T)
     {
       if ((current_output_port(sc) != sc->F) && (string_length(str) != 0))
-	port_write_string(current_output_port(sc))(sc, string_value(str), string_length(str), current_output_port(sc));
+        port_write_string(current_output_port(sc))(sc, string_value(str), string_length(str), current_output_port(sc));
       return(str);
     }
   if ((!is_output_port(pt)) ||
@@ -36868,20 +36868,20 @@ static s7_pointer g_format_no_column(s7_scheme *sc, s7_pointer args)
     {
       pt = current_output_port(sc);
       if (pt == sc->F)
-	return(nil_string);
+        return(nil_string);
     }
   if (!((is_boolean(pt)) ||
-	((is_output_port(pt)) &&             /* (current-output-port) or call-with-open-file arg, etc */
-	 (!port_is_closed(pt)))))
+        ((is_output_port(pt)) &&             /* (current-output-port) or call-with-open-file arg, etc */
+         (!port_is_closed(pt)))))
     return(method_or_bust(sc, pt, sc->format_symbol, args, a_format_port_string, 1));
 
   str = cadr(args);
   sc->format_column = 0;
   return(format_to_port_1(sc, (pt == sc->T) ? current_output_port(sc) : pt,
-			  string_value(str), cddr(args), NULL,
-			  !is_output_port(pt),   /* i.e. is boolean port so we're returning a string */
-			  false,                 /* we checked in advance that it is not columnized */
-			  string_length(str), str));
+                          string_value(str), cddr(args), NULL,
+                          !is_output_port(pt),   /* i.e. is boolean port so we're returning a string */
+                          false,                 /* we checked in advance that it is not columnized */
+                          string_length(str), str));
 }
 
 static s7_pointer format_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_pointer expr)
@@ -36891,39 +36891,39 @@ static s7_pointer format_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7_p
       const s7_pointer port = cadr(expr);
       s7_pointer str_arg = caddr(expr);
       if (is_string(str_arg))
-	{
-	  if ((args == 2) || (args == 3))
-	    {
-	      s7_int len;
-	      char *orig = string_value(str_arg);
-	      const char *p = strchr((const char *)orig, (int)'~');
-	      if (!p)
-		return((args == 2) ? sc->format_just_control_string : f);
-
-	      len = string_length(str_arg);
-	      if ((args == 2) &&
-		  (len > 1) &&
-		  (orig[len - 1] == '%') &&
-		  ((p - orig) == len - 2))
-		{
-		  orig[len - 2] = '\n';
-		  orig[len - 1] = '\0';
-		  string_length(str_arg) = len - 1;
-		  return(sc->format_just_control_string);
-		}
-	      if ((args == 3) &&
-		  (len == 2) &&
-		  (port == sc->F) &&
-		  (orig[0] == '~') &&
-		  ((orig[1] == 'A') || (orig[1] == 'a')))
-		return(sc->format_as_objstr);
-	    }
-	  /* this used to worry about optimized expr and particular cases -- why? I can't find a broken case */
-	  if (!is_columnizing(string_value(str_arg)))
-	    return(sc->format_no_column);
-	}
+        {
+          if ((args == 2) || (args == 3))
+            {
+              s7_int len;
+              char *orig = string_value(str_arg);
+              const char *p = strchr((const char *)orig, (int)'~');
+              if (!p)
+                return((args == 2) ? sc->format_just_control_string : f);
+
+              len = string_length(str_arg);
+              if ((args == 2) &&
+                  (len > 1) &&
+                  (orig[len - 1] == '%') &&
+                  ((p - orig) == len - 2))
+                {
+                  orig[len - 2] = '\n';
+                  orig[len - 1] = '\0';
+                  string_length(str_arg) = len - 1;
+                  return(sc->format_just_control_string);
+                }
+              if ((args == 3) &&
+                  (len == 2) &&
+                  (port == sc->F) &&
+                  (orig[0] == '~') &&
+                  ((orig[1] == 'A') || (orig[1] == 'a')))
+                return(sc->format_as_objstr);
+            }
+          /* this used to worry about optimized expr and particular cases -- why? I can't find a broken case */
+          if (!is_columnizing(string_value(str_arg)))
+            return(sc->format_no_column);
+        }
       if (port == sc->F)
-	return(sc->format_f);
+        return(sc->format_f);
     }
   return(f);
 }
@@ -36941,11 +36941,11 @@ static bool is_directory_b_7p(s7_scheme *sc, s7_pointer p)
     {
       block_t *b = expand_filename(sc, string_value(p));
       if (b)
-	{
-	  bool result = is_directory((char *)block_data(b));
-	  liberate(sc, b);
-	  return(result);
-	}}
+        {
+          bool result = is_directory((char *)block_data(b));
+          liberate(sc, b);
+          return(result);
+        }}
   return(is_directory(string_value(p)));
 }
 
@@ -36977,11 +36977,11 @@ static bool file_exists_b_7p(s7_scheme *sc, s7_pointer p)
     {
       block_t *b = expand_filename(sc, string_value(p));
       if (b)
-	{
-	  bool result = file_probe((char *)block_data(b));
-	  liberate(sc, b);
-	  return(result);
-	}}
+        {
+          bool result = file_probe((char *)block_data(b));
+          liberate(sc, b);
+          return(result);
+        }}
   return(file_probe(string_value(p)));
 }
 
@@ -37005,11 +37005,11 @@ static s7_pointer g_delete_file(s7_scheme *sc, s7_pointer args)
     {
       block_t *b = expand_filename(sc, string_value(name));
       if (b)
-	{
-	  s7_int result = unlink((char *)block_data(b));
-	  liberate(sc, b);
-	  return(make_integer(sc, result));
-	}}
+        {
+          s7_int result = unlink((char *)block_data(b));
+          liberate(sc, b);
+          return(make_integer(sc, result));
+        }}
   return(make_integer(sc, unlink(string_value(name))));
 }
 
@@ -37051,24 +37051,24 @@ system captures the output as a string and returns it."
       int32_t cur_len = 0, full_len = 0;
       FILE *fd = popen(string_value(name), "r");
       while (fgets(buf, BUF_SIZE, fd))
-	{
-	  s7_int buf_len = safe_strlen(buf);
-	  if (cur_len + buf_len >= full_len)
-	    {
-	      full_len += BUF_SIZE * 2;
-	      str = (str) ? (char *)Realloc(str, full_len) : (char *)Malloc(full_len);
-	    }
-	  memcpy((void *)(str + cur_len), (void *)buf, buf_len);
-	  cur_len += buf_len;
- 	}
+        {
+          s7_int buf_len = safe_strlen(buf);
+          if (cur_len + buf_len >= full_len)
+            {
+              full_len += BUF_SIZE * 2;
+              str = (str) ? (char *)Realloc(str, full_len) : (char *)Malloc(full_len);
+            }
+          memcpy((void *)(str + cur_len), (void *)buf, buf_len);
+          cur_len += buf_len;
+         }
       pclose(fd);
       if (str)
-	{
-	  block_t *b = mallocate_block(sc);
-	  block_data(b) = (void *)str;
-	  block_set_index(b, TOP_BLOCK_LIST);
-	  return(block_to_string(sc, b, cur_len));
-	}
+        {
+          block_t *b = mallocate_block(sc);
+          block_data(b) = (void *)str;
+          block_set_index(b, TOP_BLOCK_LIST);
+          return(block_to_string(sc, b, cur_len));
+        }
       return(nil_string);
     }
   return(make_integer(sc, system(string_value(name))));
@@ -37089,7 +37089,7 @@ static s7_pointer directory_to_list_1(s7_scheme *sc, const char *dir_name)
     {
       struct dirent *dirp;
       while ((dirp = readdir(dpos)))
-	sc->w = cons_unchecked(sc, s7_make_string(sc, dirp->d_name), sc->w);
+        sc->w = cons_unchecked(sc, s7_make_string(sc, dirp->d_name), sc->w);
       closedir(dpos);
     }
   result = sc->w;
@@ -37109,11 +37109,11 @@ static s7_pointer g_directory_to_list(s7_scheme *sc, s7_pointer args)
     {
       block_t *b = expand_filename(sc, string_value(name));
       if (b)
-	{
-	  s7_pointer result = directory_to_list_1(sc, (char *)block_data(b));
-	  liberate(sc, b);
-	  return(result);
-	}}
+        {
+          s7_pointer result = directory_to_list_1(sc, (char *)block_data(b));
+          liberate(sc, b);
+          return(result);
+        }}
   return(directory_to_list_1(sc, string_value(name)));
 }
 
@@ -37133,13 +37133,13 @@ static s7_pointer g_file_mtime(s7_scheme *sc, s7_pointer args)
     {
       block_t *b = expand_filename(sc, string_value(name));
       if (b)
-	{
-	  err = stat((char *)block_data(b), &statbuf);
-	  liberate(sc, b);
-	  if (err < 0)
-	    file_error_nr(sc, "file-mtime", strerror(errno), string_value(name));
-	  return(make_integer(sc, (s7_int)(statbuf.st_mtime)));
-	}}
+        {
+          err = stat((char *)block_data(b), &statbuf);
+          liberate(sc, b);
+          if (err < 0)
+            file_error_nr(sc, "file-mtime", strerror(errno), string_value(name));
+          return(make_integer(sc, (s7_int)(statbuf.st_mtime)));
+        }}
   err = stat(string_value(name), &statbuf);
   if (err < 0)
     file_error_nr(sc, "file-mtime", strerror(errno), string_value(name));
@@ -37200,7 +37200,7 @@ s7_pointer s7_make_signature(s7_scheme *sc, s7_int len, ...)
     {
       set_car(p, va_arg(ap, s7_pointer));
       if ((!is_normal_symbol(car(p))) && (!is_boolean(car(p))) && (!is_pair(car(p))))
-	s7_warn(sc, 512, "s7_make_signature got an invalid entry %s at position %" ld64, display(car(p)), i);
+        s7_warn(sc, 512, "s7_make_signature got an invalid entry %s at position %" ld64, display(car(p)), i);
     }
   va_end(ap);
   return((s7_pointer)res);
@@ -37219,7 +37219,7 @@ s7_pointer s7_make_circular_signature(s7_scheme *sc, s7_int cycle_point, s7_int
     {
       set_car(p, va_arg(ap, s7_pointer));
       if ((!is_normal_symbol(car(p))) && (!is_boolean(car(p))) && (!is_pair(car(p))))
-	s7_warn(sc, 512, "s7_make_circular_signature got an invalid entry %s at position %" ld64, display(car(p)), i);
+        s7_warn(sc, 512, "s7_make_circular_signature got an invalid entry %s at position %" ld64, display(car(p)), i);
       if (i == cycle_point) back = p;
       if (i == (len - 1)) end = p;
     }
@@ -37291,31 +37291,31 @@ static inline s7_int tree_len_1(s7_scheme *sc, s7_pointer p)
     {
       s7_pointer cp = car(p);
       if ((!is_pair(cp)) ||
-	  (is_quote(car(cp))))
-	sum++;
+          (is_quote(car(cp))))
+        sum++;
       else
-	{
-	  do {
-	    s7_pointer ccp = car(cp);
-	    if ((!is_pair(ccp)) ||
-		(is_quote(car(ccp))))
-	      sum++;
-	    else
-	      {
-		do {
-		  s7_pointer cccp = car(ccp);
-		  if ((!is_pair(cccp)) ||
-		      (is_quote(car(cccp))))
-		    sum++;
-		  else sum += tree_len_1(sc, cccp);
-		  ccp = cdr(ccp);
-		} while (is_pair(ccp));
-		if (!is_null(ccp)) sum++;
-	      }
-	    cp = cdr(cp);
-	    } while (is_pair(cp));
-	  if (!is_null(cp)) sum++;
-	}}
+        {
+          do {
+            s7_pointer ccp = car(cp);
+            if ((!is_pair(ccp)) ||
+                (is_quote(car(ccp))))
+              sum++;
+            else
+              {
+                do {
+                  s7_pointer cccp = car(ccp);
+                  if ((!is_pair(cccp)) ||
+                      (is_quote(car(cccp))))
+                    sum++;
+                  else sum += tree_len_1(sc, cccp);
+                  ccp = cdr(ccp);
+                } while (is_pair(ccp));
+                if (!is_null(ccp)) sum++;
+              }
+            cp = cdr(cp);
+            } while (is_pair(cp));
+          if (!is_null(cp)) sum++;
+        }}
   return((is_null(p)) ? sum : sum + 1);
 }
 
@@ -37363,22 +37363,22 @@ static inline bool tree_memq_1(s7_scheme *sc, s7_pointer sym, s7_pointer tree)
 
     if (is_pair(car(tree)))
       {
-	s7_pointer cp = car(tree);
-	if (is_quote(car(cp)))
-	  {
-	    if ((!is_symbol(sym)) && (!is_pair(sym)) && (is_pair(cdr(cp))) && (sym == cadr(cp)))
-	      return(true);
-	  }
-	else
-	  do {
-	      if (sym == car(cp))
-		return(true);
-	      if ((is_pair(car(cp))) && (tree_memq_1(sc, sym, car(cp))))
-		return(true);
-	      cp = cdr(cp);
-	      if (sym == cp)
-		return(true);
-	    } while (is_pair(cp));
+        s7_pointer cp = car(tree);
+        if (is_quote(car(cp)))
+          {
+            if ((!is_symbol(sym)) && (!is_pair(sym)) && (is_pair(cdr(cp))) && (sym == cadr(cp)))
+              return(true);
+          }
+        else
+          do {
+              if (sym == car(cp))
+                return(true);
+              if ((is_pair(car(cp))) && (tree_memq_1(sc, sym, car(cp))))
+                return(true);
+              cp = cdr(cp);
+              if (sym == cp)
+                return(true);
+            } while (is_pair(cp));
       }
     tree = cdr(tree);
     if (sym == tree)
@@ -37415,14 +37415,14 @@ static inline bool pair_set_memq(s7_scheme *sc, s7_pointer tree)
     {
       s7_pointer p = car(tree);
       if (is_symbol(p))
-	{
-	  if (symbol_is_in_list(sc, p))
-	    return(true);
-	}
+        {
+          if (symbol_is_in_list(sc, p))
+            return(true);
+        }
       else
-	if ((is_unquoted_pair(p)) &&
-	    (pair_set_memq(sc, p)))
-	  return(true);
+        if ((is_unquoted_pair(p)) &&
+            (pair_set_memq(sc, p)))
+          return(true);
       tree = cdr(tree);
       if (!is_pair(tree)) break;
     }
@@ -37441,9 +37441,9 @@ static bool tree_set_memq_b_7pp(s7_scheme *sc, s7_pointer syms, s7_pointer tree)
   if (sc->safety > NO_SAFETY)
     {
       if (tree_is_cyclic(sc, syms))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "tree-set-memq: symbol list is cyclic: ~S", 40), syms));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "tree-set-memq: symbol list is cyclic: ~S", 40), syms));
       if (tree_is_cyclic(sc, tree))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "tree-set-memq: tree is cyclic: ~S", 33), tree));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "tree-set-memq: tree is cyclic: ~S", 33), tree));
     }
   clear_symbol_list(sc);
   for (s7_pointer p = syms; is_pair(p); p = cdr(p))
@@ -37456,8 +37456,8 @@ static bool tree_set_memq_b_7pp(s7_scheme *sc, s7_pointer syms, s7_pointer tree)
   if (non_symbols)
     for (s7_pointer p = syms; is_pair(p); p = cdr(p))
       if ((!is_symbol(car(p))) &&
-	  (s7_tree_memq(sc, car(p), tree)))
-	return(true);
+          (s7_tree_memq(sc, car(p), tree)))
+        return(true);
   return(false);
 }
 
@@ -37499,8 +37499,8 @@ static s7_pointer tree_set_memq_chooser(s7_scheme *sc, s7_pointer f, int32_t unu
       (is_pair(cadadr(expr))))               /*  (tree-set-memq '(...)...) */
     {
       for (s7_pointer p = cadadr(expr); is_pair(p); p = cdr(p))
-	if (!is_symbol(car(p)))
-	  return(f);
+        if (!is_symbol(car(p)))
+          return(f);
       return(sc->tree_set_memq_syms);
     }
   return(f);
@@ -37538,8 +37538,8 @@ static s7_pointer g_tree_count(s7_scheme *sc, s7_pointer args)
   if (!is_pair(tree))
     {
       if ((is_pair(cddr(args))) &&
-	  (!s7_is_integer(caddr(args))))
-	wrong_type_error_nr(sc, sc->tree_count_symbol, 3, caddr(args), sc->type_names[T_INTEGER]);
+          (!s7_is_integer(caddr(args))))
+        wrong_type_error_nr(sc, sc->tree_count_symbol, 3, caddr(args), sc->type_names[T_INTEGER]);
       if (is_null(tree)) return(int_zero);
       wrong_type_error_nr(sc, sc->tree_count_symbol, 2, tree, a_list_string);
     }
@@ -37603,7 +37603,7 @@ s7_int s7_list_length(s7_scheme *sc, s7_pointer a) /* returns -len if list is do
       if (!is_pair(fast)) return((is_null(fast)) ? (i + 1) : (-i - 1)); /* if unrolled further, it's a lot slower? */
       fast = cdr(fast);
       slow = cdr(slow);
-      if (fast == slow)	return(0);
+      if (fast == slow)        return(0);
     }
   return(0);
 }
@@ -37637,7 +37637,7 @@ bool s7_is_proper_list(s7_scheme *sc, s7_pointer lst)
   while (true)
     {
       if (!is_pair(fast))
-	return(is_null(fast)); /* else it's an improper list */
+        return(is_null(fast)); /* else it's an improper list */
       LOOP_4(fast = cdr(fast); if (!is_pair(fast)) return(is_null(fast)));
       fast = cdr(fast);
       slow = cdr(slow);
@@ -37686,7 +37686,7 @@ static inline s7_pointer make_list(s7_scheme *sc, s7_int len, s7_pointer init)
     case 6: return(T_Pair(cons_unchecked(sc, init, cons_unchecked(sc, init, cons_unchecked(sc, init,
                     cons_unchecked(sc, init, cons_unchecked(sc, init, cons(sc, init, sc->nil))))))));
     case 7: return(T_Pair(cons_unchecked(sc, init, cons_unchecked(sc, init, cons_unchecked(sc, init,
-		    cons_unchecked(sc, init, cons_unchecked(sc, init, cons_unchecked(sc, init, cons(sc, init, sc->nil)))))))));
+                    cons_unchecked(sc, init, cons_unchecked(sc, init, cons_unchecked(sc, init, cons(sc, init, sc->nil)))))))));
     default:
       return(make_big_list(sc, len, init));
     }
@@ -37711,8 +37711,8 @@ static s7_pointer make_list_p_pp(s7_scheme *sc, s7_pointer n, s7_pointer init)
     out_of_range_error_nr(sc, sc->make_list_symbol, int_one, n, it_is_negative_string);
   if (len > sc->max_list_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-list length argument ~D is greater than (*s7* 'max-list-length), ~D", 72),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_list_length)));
+             set_elist_3(sc, wrap_string(sc, "make-list length argument ~D is greater than (*s7* 'max-list-length), ~D", 72),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_list_length)));
 
   return(make_list(sc, len, init));
 }
@@ -37760,8 +37760,8 @@ static s7_pointer ref_index_checked(s7_scheme *sc, s7_pointer caller, s7_pointer
 {
   if (!is_applicable(in_obj)) /* let implicit_index shuffle syntax and closures */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~$ becomes ~$, but ~S can't take arguments", 42),
-			 cons(sc, caller, args), cons(sc, in_obj, cddr(args)), in_obj));
+             set_elist_4(sc, wrap_string(sc, "~$ becomes ~$, but ~S can't take arguments", 42),
+                         cons(sc, caller, args), cons(sc, in_obj, cddr(args)), in_obj));
   /* perhaps first $s -> "(~S ~{~$~^ ~})..." and we can pass the symbol rather than the global value as "caller" */
   return(implicit_index(sc, in_obj, cddr(args)));
 }
@@ -37804,8 +37804,8 @@ static s7_pointer implicit_pair_index_checked(s7_scheme *sc, s7_pointer obj, s7_
     {
       s7_pointer safe_indices = copy_proper_list(sc, indices);
       error_nr(sc, sc->syntax_error_symbol,
-	       set_elist_4(sc, wrap_string(sc, "~$ becomes ~$, but ~S can't take arguments", 42),
-			   cons(sc, obj, safe_indices), cons(sc, in_obj, cdr(safe_indices)), in_obj));
+               set_elist_4(sc, wrap_string(sc, "~$ becomes ~$, but ~S can't take arguments", 42),
+                           cons(sc, obj, safe_indices), cons(sc, in_obj, cdr(safe_indices)), in_obj));
     }
   return(implicit_index(sc, in_obj, cdr(indices)));
 }
@@ -37827,11 +37827,11 @@ static s7_pointer list_ref_chooser(s7_scheme *sc, s7_pointer f, int32_t args, s7
     {
       s7_pointer index = caddr(expr);
       if (is_t_integer(index))
-	{
-	  if (integer(index) == 0) return(sc->list_ref_at_0);
-	  if (integer(index) == 1) return(sc->list_ref_at_1);
-	  if (integer(index) == 2) return(sc->list_ref_at_2);
-	}}
+        {
+          if (integer(index) == 0) return(sc->list_ref_at_0);
+          if (integer(index) == 1) return(sc->list_ref_at_1);
+          if (integer(index) == 2) return(sc->list_ref_at_2);
+        }}
   return(f);
 }
 
@@ -37844,7 +37844,7 @@ static inline s7_pointer list_ref_p_pi_unchecked(s7_scheme *sc, s7_pointer p1, s
   if (!is_pair(p))
     {
       if (is_null(p))
-	out_of_range_error_nr(sc, sc->list_ref_symbol, int_two, wrap_integer(sc, i1), it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->list_ref_symbol, int_two, wrap_integer(sc, i1), it_is_too_large_string);
       wrong_type_error_nr(sc, sc->list_ref_symbol, 1, p1, a_proper_list_string);
     }
   return(car(p));
@@ -37906,7 +37906,7 @@ static s7_pointer g_list_set_1(s7_scheme *sc, s7_pointer lst, s7_pointer args, i
   if (!is_pair(p))
     {
       if (is_null(p))
-	out_of_range_error_nr(sc, sc->list_set_symbol, wrap_integer(sc, arg_num), ind, it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->list_set_symbol, wrap_integer(sc, arg_num), ind, it_is_too_large_string);
       wrong_type_error_nr(sc, sc->list_set_symbol, 1, lst, a_proper_list_string);
     }
   if (is_null(cddr(args)))
@@ -37914,7 +37914,7 @@ static s7_pointer g_list_set_1(s7_scheme *sc, s7_pointer lst, s7_pointer args, i
   else
     {
       if (!s7_is_pair(car(p)))
-	wrong_number_of_arguments_error_nr(sc, "too many arguments for list-set!: ~S", 36, args);
+        wrong_number_of_arguments_error_nr(sc, "too many arguments for list-set!: ~S", 36, args);
       return(g_list_set_1(sc, car(p), cdr(args), arg_num + 1));
     }
   return(cadr(args));
@@ -37931,7 +37931,7 @@ static inline s7_pointer list_set_p_pip_unchecked(s7_scheme *sc, s7_pointer p1,
   if (!is_pair(p))
     {
       if (is_null(p))
-	out_of_range_error_nr(sc, sc->list_set_symbol, int_two, wrap_integer(sc, i1), it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->list_set_symbol, int_two, wrap_integer(sc, i1), it_is_too_large_string);
       wrong_type_error_nr(sc, sc->list_set_symbol, 1, p1, a_proper_list_string);
     }
   set_car(p, p2);
@@ -37951,7 +37951,7 @@ static s7_pointer list_increment_p_pip_unchecked(opt_info *o)
   if (!is_pair(p))
     {
       if (is_null(p))
-	out_of_range_error_nr(sc, sc->list_set_symbol, int_two, wrap_integer(sc, index), it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->list_set_symbol, int_two, wrap_integer(sc, index), it_is_too_large_string);
       wrong_type_error_nr(sc, sc->list_set_symbol, 1, p1, a_proper_list_string);
     }
   p2 = g_add_xi(sc, car(p), integer(o->v[3].p), index);
@@ -37982,7 +37982,7 @@ static s7_pointer g_list_set_i(s7_scheme *sc, s7_pointer args)
   if (!is_pair(p))
     {
       if (is_null(p))
-	out_of_range_error_nr(sc, sc->list_set_symbol, int_two, wrap_integer(sc, index), it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->list_set_symbol, int_two, wrap_integer(sc, index), it_is_too_large_string);
       wrong_type_error_nr(sc, sc->list_set_symbol, 1, lst, a_proper_list_string);
     }
   val = caddr(args);
@@ -38657,8 +38657,8 @@ s7_pointer s7_assq(s7_scheme *sc, s7_pointer obj, s7_pointer x)
 static s7_pointer assq_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
 {
   return((is_pair(y)) ? s7_assq(sc, x, y) :
-	 ((is_null(y)) ? sc->F :
-	  method_or_bust_pp(sc, y, sc->assq_symbol, x, y, an_association_list_string, 2)));
+         ((is_null(y)) ? sc->F :
+          method_or_bust_pp(sc, y, sc->assq_symbol, x, y, an_association_list_string, 2)));
 }
 
 static s7_pointer g_assq(s7_scheme *sc, s7_pointer args)
@@ -38736,31 +38736,31 @@ static s7_pointer assoc_1(s7_scheme *sc, s7_pointer obj, s7_pointer x)
   if (is_string(obj))
     {
       while (true)
-	{
-	  if (is_pair(car(x)))
-	    {
-	      s7_pointer val = caar(x);
-	      if ((val == obj) ||
-		  ((is_string(val)) &&
-		   (scheme_strings_are_equal(obj, val))))
-		return(car(x));
-	    }
-	  x = cdr(x);
-	  if (!is_pair(x)) return(sc->F);
-
-	  if (is_pair(car(x)))
-	    {
-	      s7_pointer val = caar(x);
-	      if ((val == obj) ||
-		  ((is_string(val)) &&
-		   (scheme_strings_are_equal(obj, val))))
-		return(car(x));
-	    }
-	  x = cdr(x);
-	  if (!is_pair(x)) return(sc->F);
-	  y = cdr(y);
-	  if (x == y) return(sc->F);
-	}
+        {
+          if (is_pair(car(x)))
+            {
+              s7_pointer val = caar(x);
+              if ((val == obj) ||
+                  ((is_string(val)) &&
+                   (scheme_strings_are_equal(obj, val))))
+                return(car(x));
+            }
+          x = cdr(x);
+          if (!is_pair(x)) return(sc->F);
+
+          if (is_pair(car(x)))
+            {
+              s7_pointer val = caar(x);
+              if ((val == obj) ||
+                  ((is_string(val)) &&
+                   (scheme_strings_are_equal(obj, val))))
+                return(car(x));
+            }
+          x = cdr(x);
+          if (!is_pair(x)) return(sc->F);
+          y = cdr(y);
+          if (x == y) return(sc->F);
+        }
       return(sc->F);
     }
   while (true)
@@ -38781,9 +38781,9 @@ static s7_pointer assoc_1(s7_scheme *sc, s7_pointer obj, s7_pointer x)
 static bool closure_has_two_normal_args(s7_scheme *sc, s7_pointer eq_func) /* sc for is_null */
 {
   return((is_closure(eq_func)) &&
-	 (is_pair(closure_args(eq_func))) &&
-	 (is_pair(cdr(closure_args(eq_func)))) && /* not dotted arg list */
-	 (is_null(cddr(closure_args(eq_func)))));  /* arity == 2 */
+         (is_pair(closure_args(eq_func))) &&
+         (is_pair(cdr(closure_args(eq_func)))) && /* not dotted arg list */
+         (is_null(cddr(closure_args(eq_func)))));  /* arity == 2 */
 }
 
 static s7_pointer g_is_eq(s7_scheme *sc, s7_pointer args);
@@ -38802,9 +38802,9 @@ If 'func' is a function of 2 arguments, it is used for the comparison instead of
   if (!is_null(x))
     {
       if (!is_pair(x))
-	return(method_or_bust(sc, x, sc->assoc_symbol, args, an_association_list_string, 2));
+        return(method_or_bust(sc, x, sc->assoc_symbol, args, an_association_list_string, 2));
       if (!is_pair(car(x)))
-	wrong_type_error_nr(sc, sc->assoc_symbol, 2, x, an_association_list_string); /* we're assuming caar below so it better exist */
+        wrong_type_error_nr(sc, sc->assoc_symbol, 2, x, an_association_list_string); /* we're assuming caar below so it better exist */
     }
   if (is_pair(cddr(args)))
     {
@@ -38814,65 +38814,65 @@ If 'func' is a function of 2 arguments, it is used for the comparison instead of
       /* I wonder if the assoc equality function should get the cons, not just caar? */
 
       if (is_safe_c_function(eq_func))
-	{
-	  s7_function func = c_function_call(eq_func);
-	  if (func == g_is_eq) return(is_null(x) ? sc->F : s7_assq(sc, car(args), x));
-	  if (func == g_is_eqv) return(assv_p_pp(sc, car(args), x));
-	  if (!s7_is_aritable(sc, eq_func, 2))
-	    wrong_type_error_nr(sc, sc->assoc_symbol, 3, eq_func, an_eq_func_string);
-	  set_car(sc->t2_1, car(args));
-	  for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
-	    {
-	      if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string); /* not x */
-	      set_car(sc->t2_2, caar(x));
-	      if (is_true(sc, func(sc, sc->t2_1))) return(car(x));
-	      x = cdr(x);
-	      if ((!is_pair(x)) || (x == slow)) return(sc->F);
-	      if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string);
-	      set_car(sc->t2_2, caar(x));
-	      if (is_true(sc, func(sc, sc->t2_1))) return(car(x));
-	    }
-	  return(sc->F);
-	}
+        {
+          s7_function func = c_function_call(eq_func);
+          if (func == g_is_eq) return(is_null(x) ? sc->F : s7_assq(sc, car(args), x));
+          if (func == g_is_eqv) return(assv_p_pp(sc, car(args), x));
+          if (!s7_is_aritable(sc, eq_func, 2))
+            wrong_type_error_nr(sc, sc->assoc_symbol, 3, eq_func, an_eq_func_string);
+          set_car(sc->t2_1, car(args));
+          for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
+            {
+              if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string); /* not x */
+              set_car(sc->t2_2, caar(x));
+              if (is_true(sc, func(sc, sc->t2_1))) return(car(x));
+              x = cdr(x);
+              if ((!is_pair(x)) || (x == slow)) return(sc->F);
+              if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string);
+              set_car(sc->t2_2, caar(x));
+              if (is_true(sc, func(sc, sc->t2_1))) return(car(x));
+            }
+          return(sc->F);
+        }
       if (closure_has_two_normal_args(sc, eq_func))
-	{
-	  s7_pointer body = closure_body(eq_func);
-	  if (is_null(x)) return(sc->F);
-	  if (is_null(cdr(body)))
-	    {
-	      s7_pfunc func;
-	      set_curlet(sc, make_let_with_two_slots(sc, sc->curlet, car(closure_args(eq_func)), car(args), cadr(closure_args(eq_func)), sc->F));
-	      func = s7_bool_optimize(sc, body);
-	      if (func)
-		{
-		  s7_pointer slowx = x;
-		  opt_info *o = sc->opts[0];
-		  s7_pointer b = next_slot(let_slots(sc->curlet));
-		  while (true)
-		    {
-		      if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string);
-		      slot_set_value(b, caar(x));
-		      if (o->v[0].fb(o)) return(car(x));
-		      x = cdr(x);
-		      if (!is_pair(x)) return(sc->F);
-		      if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string);
-		      slot_set_value(b, caar(x));
-		      if (o->v[0].fb(o)) return(car(x));
-		      x = cdr(x);
-		      if (!is_pair(x)) return(sc->F);
-		      slowx = cdr(slowx);
-		      if (x == slowx) return(sc->F);
-		    }
-		  return(sc->F);
-		}}}
+        {
+          s7_pointer body = closure_body(eq_func);
+          if (is_null(x)) return(sc->F);
+          if (is_null(cdr(body)))
+            {
+              s7_pfunc func;
+              set_curlet(sc, make_let_with_two_slots(sc, sc->curlet, car(closure_args(eq_func)), car(args), cadr(closure_args(eq_func)), sc->F));
+              func = s7_bool_optimize(sc, body);
+              if (func)
+                {
+                  s7_pointer slowx = x;
+                  opt_info *o = sc->opts[0];
+                  s7_pointer b = next_slot(let_slots(sc->curlet));
+                  while (true)
+                    {
+                      if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string);
+                      slot_set_value(b, caar(x));
+                      if (o->v[0].fb(o)) return(car(x));
+                      x = cdr(x);
+                      if (!is_pair(x)) return(sc->F);
+                      if (!is_pair(car(x))) wrong_type_error_nr(sc, sc->assoc_symbol, 2, cadr(args), an_association_list_string);
+                      slot_set_value(b, caar(x));
+                      if (o->v[0].fb(o)) return(car(x));
+                      x = cdr(x);
+                      if (!is_pair(x)) return(sc->F);
+                      slowx = cdr(slowx);
+                      if (x == slowx) return(sc->F);
+                    }
+                  return(sc->F);
+                }}}
 
       /* member_if is similar.  Do not call eval here with op_eval_done to return!  An error will longjmp past the
        *   assoc point, leaving the op_eval_done on the stack, causing s7 to quit.
        */
       if (type(eq_func) < T_CONTINUATION)
-	return(method_or_bust_p(sc, eq_func, sc->assoc_symbol, a_procedure_string));
+        return(method_or_bust_p(sc, eq_func, sc->assoc_symbol, a_procedure_string));
       if (!s7_is_aritable(sc, eq_func, 2))
-	wrong_type_error_nr(sc, sc->assoc_symbol, 3, eq_func, an_eq_func_string);
+        wrong_type_error_nr(sc, sc->assoc_symbol, 3, eq_func, an_eq_func_string);
       if (is_null(x)) return(sc->F);
       if ((is_any_macro(eq_func)) && (!is_c_macro(eq_func))) clear_all_optimizations(sc, closure_body(eq_func));
       y = list_1(sc, copy_proper_list(sc, args));
@@ -38880,13 +38880,13 @@ If 'func' is a function of 2 arguments, it is used for the comparison instead of
       set_opt2_slow(y, x);
       push_stack(sc, OP_ASSOC_IF, list_1_unchecked(sc, y), eq_func);
       if (needs_copied_args(eq_func))
-	push_stack(sc, OP_APPLY, list_2_unchecked(sc, car(args), caar(x)), eq_func);
+        push_stack(sc, OP_APPLY, list_2_unchecked(sc, car(args), caar(x)), eq_func);
       else
-	{
-	  set_car(sc->t2_1, car(args));
-	  set_car(sc->t2_2, caar(x));
-	  push_stack(sc, OP_APPLY, sc->t2_1, eq_func);
-	}
+        {
+          set_car(sc->t2_1, car(args));
+          set_car(sc->t2_2, caar(x));
+          push_stack(sc, OP_APPLY, sc->t2_1, eq_func);
+        }
       return(sc->unspecified);
     }
   if (is_null(x)) return(sc->F);
@@ -38930,10 +38930,10 @@ static bool op_assoc_if(s7_scheme *sc)
     {
       /* circular list check */
       if (opt1_fast(orig_args) == opt2_slow(orig_args))
-	{
-	  sc->value = sc->F;
-	  return(true);
-	}
+        {
+          sc->value = sc->F;
+          return(true);
+        }
       set_opt2_slow(orig_args, cdr(opt2_slow(orig_args))); /* cdr down the slow list */
       push_stack_direct(sc, OP_ASSOC_IF);
     }
@@ -38978,7 +38978,7 @@ s7_pointer s7_memq(s7_scheme *sc, s7_pointer obj, s7_pointer x)
 static s7_pointer memq_p_pp(s7_scheme *sc, s7_pointer x, s7_pointer y)
 {
   return((is_pair(y)) ? s7_memq(sc, x, y) :
-	 ((is_null(y)) ? sc->F : method_or_bust_pp(sc, y, sc->memq_symbol, x, y, a_list_string, 2)));
+         ((is_null(y)) ? sc->F : method_or_bust_pp(sc, y, sc->memq_symbol, x, y, a_list_string, 2)));
 }
 
 static s7_pointer g_memq(s7_scheme *sc, s7_pointer args)
@@ -39068,13 +39068,13 @@ static s7_pointer memq_chooser(s7_scheme *sc, s7_pointer f, int32_t unused_args,
     {
       s7_int len = s7_list_length(sc, cadr(lst));
       if (len > 0)
-	{
-	  if (len == 2) /* this used to set opt3_any to cadr, but that doesn't survive call/cc's copy_stack */
-	    return(sc->memq_2);
-	  if ((len % 4) == 0)
-	    return(sc->memq_4);
-	  return(((len % 3) == 0) ? sc->memq_3 : sc->memq_any);
-	}}
+        {
+          if (len == 2) /* this used to set opt3_any to cadr, but that doesn't survive call/cc's copy_stack */
+            return(sc->memq_2);
+          if ((len % 4) == 0)
+            return(sc->memq_4);
+          return(((len % 3) == 0) ? sc->memq_3 : sc->memq_any);
+        }}
   return(f);
 }
 
@@ -39164,28 +39164,28 @@ static s7_pointer member(s7_scheme *sc, s7_pointer obj, s7_pointer x)
   if (is_string(obj))
     while (true)
       {
-	if ((obj == car(x)) ||
-	    ((is_string(car(x))) &&
-	     (scheme_strings_are_equal(obj, car(x)))))
-	  return(x);
-	x = cdr(x);
-	if (!is_pair(x)) return(sc->F);
-
-	if ((obj == car(x)) ||
-	    ((is_string(car(x))) &&
-	     (scheme_strings_are_equal(obj, car(x)))))
-	  return(x);
-	x = cdr(x);
-	if (!is_pair(x)) return(sc->F);
-	y = cdr(y);
-	if (x == y) return(sc->F);
+        if ((obj == car(x)) ||
+            ((is_string(car(x))) &&
+             (scheme_strings_are_equal(obj, car(x)))))
+          return(x);
+        x = cdr(x);
+        if (!is_pair(x)) return(sc->F);
+
+        if ((obj == car(x)) ||
+            ((is_string(car(x))) &&
+             (scheme_strings_are_equal(obj, car(x)))))
+          return(x);
+        x = cdr(x);
+        if (!is_pair(x)) return(sc->F);
+        y = cdr(y);
+        if (x == y) return(sc->F);
       }
   else
     while (true)
       {
-	LOOP_4(if (s7_is_equal(sc, obj, car(x))) return(x); x = cdr(x); if (!is_pair(x)) return(sc->F));
-	y = cdr(y);
-	if (x == y) return(sc->F);
+        LOOP_4(if (s7_is_equal(sc, obj, car(x))) return(x); x = cdr(x); if (!is_pair(x)) return(sc->F));
+        y = cdr(y);
+        if (x == y) return(sc->F);
       }
   return(sc->F);
 }
@@ -39217,78 +39217,78 @@ member uses equal?  If 'func' is a function of 2 arguments, it is used for the c
       s7_pointer y, eq_func = caddr(args);
 
       if (is_safe_c_function(eq_func))
-	{
-	  s7_function func = c_function_call(eq_func);
-	  if (func == g_is_eq) return(is_null(x) ? sc->F : s7_memq(sc, car(args), x));
-	  if (func == g_is_eqv) return(g_memv(sc, args));
-	  if (func == g_less)
-	    func = g_less_2;
-	  else
-	    if (func == g_greater)
-	      func = g_greater_2;
-	  else
-	    if (!s7_is_aritable(sc, eq_func, 2))
-	      wrong_type_error_nr(sc, sc->member_symbol, 3, eq_func, an_eq_func_string);
-	  set_car(sc->t2_1, car(args));
-	  for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
-	    {
-	      set_car(sc->t2_2, car(x));
-	      if (is_true(sc, func(sc, sc->t2_1))) return(x);
-	      if (!is_pair(cdr(x))) return(sc->F);
-	      x = cdr(x);
-	      if (x == slow) return(sc->F);
-	      set_car(sc->t2_2, car(x));
-	      if (is_true(sc, func(sc, sc->t2_1))) return(x);
-	    }
-	  return(sc->F);
-	}
+        {
+          s7_function func = c_function_call(eq_func);
+          if (func == g_is_eq) return(is_null(x) ? sc->F : s7_memq(sc, car(args), x));
+          if (func == g_is_eqv) return(g_memv(sc, args));
+          if (func == g_less)
+            func = g_less_2;
+          else
+            if (func == g_greater)
+              func = g_greater_2;
+          else
+            if (!s7_is_aritable(sc, eq_func, 2))
+              wrong_type_error_nr(sc, sc->member_symbol, 3, eq_func, an_eq_func_string);
+          set_car(sc->t2_1, car(args));
+          for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
+            {
+              set_car(sc->t2_2, car(x));
+              if (is_true(sc, func(sc, sc->t2_1))) return(x);
+              if (!is_pair(cdr(x))) return(sc->F);
+              x = cdr(x);
+              if (x == slow) return(sc->F);
+              set_car(sc->t2_2, car(x));
+              if (is_true(sc, func(sc, sc->t2_1))) return(x);
+            }
+          return(sc->F);
+        }
 
       if (closure_has_two_normal_args(sc, eq_func))
-	{
-	  s7_pointer body = closure_body(eq_func);
-	  if (is_null(x)) return(sc->F);
-	  if ((!no_bool_opt(body)) &&
-	      (is_null(cdr(body))))
-	    {
-	      s7_pfunc func;
-	      set_curlet(sc, make_let_with_two_slots(sc, sc->curlet, car(closure_args(eq_func)), car(args), cadr(closure_args(eq_func)), sc->F));
-	      func = s7_bool_optimize(sc, body);
-	      if (func)
-		{
-		  opt_info *o = sc->opts[0];
-		  s7_pointer b = next_slot(let_slots(sc->curlet));
-		  if (o->v[0].fb == p_to_b)
-		    {
-		      s7_pointer (*fp)(opt_info *o) = o->v[O_WRAP].fp;
-		      for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
-			{
-			  slot_set_value(b, car(x));
-			  if (fp(o) != sc->F) return(x);
-			  if (!is_pair(cdr(x))) return(sc->F);
-			  x = cdr(x);
-			  if (x == slow) return(sc->F);
-			  slot_set_value(b, car(x));
-			  if (fp(o) != sc->F) return(x);
-			}}
-		  else
-		    for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
-		      {
-			slot_set_value(b, car(x));
-			if (o->v[0].fb(o)) return(x);
-			if (!is_pair(cdr(x))) return(sc->F);
-			x = cdr(x);
-			if (x == slow) return(sc->F);
-			slot_set_value(b, car(x));
-			if (o->v[0].fb(o)) return(x);
-		      }
-		  return(sc->F);
-		}
-	      set_no_bool_opt(body);
-	    }}
+        {
+          s7_pointer body = closure_body(eq_func);
+          if (is_null(x)) return(sc->F);
+          if ((!no_bool_opt(body)) &&
+              (is_null(cdr(body))))
+            {
+              s7_pfunc func;
+              set_curlet(sc, make_let_with_two_slots(sc, sc->curlet, car(closure_args(eq_func)), car(args), cadr(closure_args(eq_func)), sc->F));
+              func = s7_bool_optimize(sc, body);
+              if (func)
+                {
+                  opt_info *o = sc->opts[0];
+                  s7_pointer b = next_slot(let_slots(sc->curlet));
+                  if (o->v[0].fb == p_to_b)
+                    {
+                      s7_pointer (*fp)(opt_info *o) = o->v[O_WRAP].fp;
+                      for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
+                        {
+                          slot_set_value(b, car(x));
+                          if (fp(o) != sc->F) return(x);
+                          if (!is_pair(cdr(x))) return(sc->F);
+                          x = cdr(x);
+                          if (x == slow) return(sc->F);
+                          slot_set_value(b, car(x));
+                          if (fp(o) != sc->F) return(x);
+                        }}
+                  else
+                    for (s7_pointer slow = x; is_pair(x); x = cdr(x), slow = cdr(slow))
+                      {
+                        slot_set_value(b, car(x));
+                        if (o->v[0].fb(o)) return(x);
+                        if (!is_pair(cdr(x))) return(sc->F);
+                        x = cdr(x);
+                        if (x == slow) return(sc->F);
+                        slot_set_value(b, car(x));
+                        if (o->v[0].fb(o)) return(x);
+                      }
+                  return(sc->F);
+                }
+              set_no_bool_opt(body);
+            }}
       if (type(eq_func) < T_CONTINUATION)
-	return(method_or_bust(sc, eq_func, sc->member_symbol, args, a_procedure_string, 3));
+        return(method_or_bust(sc, eq_func, sc->member_symbol, args, a_procedure_string, 3));
       if (!s7_is_aritable(sc, eq_func, 2))
-	wrong_type_error_nr(sc, sc->member_symbol, 3, eq_func, an_eq_func_string);
+        wrong_type_error_nr(sc, sc->member_symbol, 3, eq_func, an_eq_func_string);
       if (is_null(x)) return(sc->F);
       if ((is_any_macro(eq_func)) && (!is_c_macro(eq_func))) clear_all_optimizations(sc, closure_body(eq_func));
       y = list_1(sc, copy_proper_list(sc, args)); /* this could probably be handled with a counter cell (cdr here is unused) */
@@ -39296,13 +39296,13 @@ member uses equal?  If 'func' is a function of 2 arguments, it is used for the c
       set_opt2_slow(y, x);
       push_stack(sc, OP_MEMBER_IF, list_1(sc, y), eq_func);
       if (needs_copied_args(eq_func))
-	push_stack(sc, OP_APPLY, list_2_unchecked(sc, car(args), car(x)), eq_func);
+        push_stack(sc, OP_APPLY, list_2_unchecked(sc, car(args), car(x)), eq_func);
       else
-	{
-	  set_car(sc->t2_1, car(args));
-	  set_car(sc->t2_2, car(x));
-	  push_stack(sc, OP_APPLY, sc->t2_1, eq_func);
-	}
+        {
+          set_car(sc->t2_1, car(args));
+          set_car(sc->t2_2, car(x));
+          push_stack(sc, OP_APPLY, sc->t2_1, eq_func);
+        }
       return(sc->unspecified);
     }
   if (is_null(x)) return(sc->F);
@@ -39357,10 +39357,10 @@ static bool op_member_if(s7_scheme *sc)
     {
       /* circular list check */
       if (opt1_fast(orig_args) == opt2_slow(orig_args))
-	{
-	  sc->value = sc->F;
-	  return(true);
-	}
+        {
+          sc->value = sc->F;
+          return(true);
+        }
       set_opt2_slow(orig_args, cdr(opt2_slow(orig_args))); /* cdr down the slow list (check for circular list) */
       push_stack_direct(sc, OP_MEMBER_IF);
     }
@@ -39411,9 +39411,9 @@ static void check_list_validity(s7_scheme *sc, const char *caller, s7_pointer ls
   for (int32_t i = 1; is_pair(p); p = cdr(p), i++)
     if (!s7_is_valid(sc, car(p)))
       {
-	if (i < 11)
-	  s7_warn(sc, 256, "the %s argument to %s: %p, is not an s7 object\n", ordinal[i], caller, car(p));
-	else s7_warn(sc, 256, "%s: argument number %d is not an s7 object: %p\n", caller, i, car(p));
+        if (i < 11)
+          s7_warn(sc, 256, "the %s argument to %s: %p, is not an s7 object\n", ordinal[i], caller, car(p));
+        else s7_warn(sc, 256, "%s: argument number %d is not an s7 object: %p\n", caller, i, car(p));
       }
 }
 
@@ -39451,10 +39451,10 @@ s7_pointer s7_list_nl(s7_scheme *sc, s7_int num_values, ...) /* arglist should b
     {
       p = va_arg(ap, s7_pointer);
       if (!p)
-	{
-	  va_end(ap);
-	  wrong_number_of_arguments_error_nr(sc, "not enough arguments for s7_list_nl: ~S", 39, sc->w); /* ideally we'd sublist this and append extra below */
-	}
+        {
+          va_end(ap);
+          wrong_number_of_arguments_error_nr(sc, "not enough arguments for s7_list_nl: ~S", 39, sc->w); /* ideally we'd sublist this and append extra below */
+        }
       set_car(q, p);
     }
   p = va_arg(ap, s7_pointer);
@@ -39503,15 +39503,15 @@ static s7_pointer make_safe_list(s7_scheme *sc, s7_int num_args)
     {
       sc->current_safe_list = num_args;
       if (!is_pair(sc->safe_lists[num_args]))
-	sc->safe_lists[num_args] = semipermanent_list(sc, num_args);
+        sc->safe_lists[num_args] = semipermanent_list(sc, num_args);
       if (!list_is_in_use(sc->safe_lists[num_args]))
-	{
-	  set_list_in_use(sc->safe_lists[num_args]);
+        {
+          set_list_in_use(sc->safe_lists[num_args]);
 #if S7_DEBUGGING
-	  sc->safe_list_uses[num_args]++;
+          sc->safe_list_uses[num_args]++;
 #endif
-	  return(sc->safe_lists[num_args]);
-	}}
+          return(sc->safe_lists[num_args]);
+        }}
   return(make_big_list(sc, num_args, sc->nil));
 }
 
@@ -39541,83 +39541,83 @@ static s7_pointer g_list_append(s7_scheme *sc, s7_pointer args)
       s7_pointer p = car(y), func;
 
       if ((has_active_methods(sc, p)) &&
-	  ((func = find_method_with_let(sc, p, sc->append_symbol)) != sc->undefined))
-	{
-	  unstack_gc_protect(sc);
-	  return(s7_apply_function(sc, func, (is_null(tp)) ? y : set_ulist_1(sc, tp, y)));
-	}
+          ((func = find_method_with_let(sc, p, sc->append_symbol)) != sc->undefined))
+        {
+          unstack_gc_protect(sc);
+          return(s7_apply_function(sc, func, (is_null(tp)) ? y : set_ulist_1(sc, tp, y)));
+        }
       if (is_null(cdr(y)))
-	{
-	  if (is_null(tp))
-	    {
-	      /* Guile: (append '() 1): 1, r7rs claims an improper list is the result, yet its own examples contradict that
-	       *   (what does "share structure" mean when there are no structures?  I assume they mean sequences)
-	       */
-	      unstack_gc_protect(sc);
-	      return(p);
-	    }
-	  if (is_list(p))
-	    set_cdr(np, p);
-	  else
-	    {
-	      s7_int len = sequence_length(sc, p);
-	      if (len > 0)
-		set_cdr(np, s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, p, make_list(sc, len, sc->unused))));
-	      else
-		if (len < 0)
-		  set_cdr(np, p);
-	    }
-	  sc->temp8 = sc->unused;
-	  unstack_gc_protect(sc);
-	  return(tp);
-	}
+        {
+          if (is_null(tp))
+            {
+              /* Guile: (append '() 1): 1, r7rs claims an improper list is the result, yet its own examples contradict that
+               *   (what does "share structure" mean when there are no structures?  I assume they mean sequences)
+               */
+              unstack_gc_protect(sc);
+              return(p);
+            }
+          if (is_list(p))
+            set_cdr(np, p);
+          else
+            {
+              s7_int len = sequence_length(sc, p);
+              if (len > 0)
+                set_cdr(np, s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, p, make_list(sc, len, sc->unused))));
+              else
+                if (len < 0)
+                  set_cdr(np, p);
+            }
+          sc->temp8 = sc->unused;
+          unstack_gc_protect(sc);
+          return(tp);
+        }
 
       if (!is_sequence(p))
-	{
-	  unstack_gc_protect(sc);
-	  wrong_type_error_nr(sc, sc->append_symbol, position_of(y, args), p, a_sequence_string);
-	}
+        {
+          unstack_gc_protect(sc);
+          wrong_type_error_nr(sc, sc->append_symbol, position_of(y, args), p, a_sequence_string);
+        }
       if (!sequence_is_empty(sc, p))
-	{
-	  if (is_pair(p))
-	    {
-	      if (!s7_is_proper_list(sc, p))
-		{
-		  sc->temp8 = sc->unused;
-		  unstack_gc_protect(sc);
-		  wrong_type_error_nr(sc, sc->append_symbol, position_of(y, args), p, a_proper_list_string);
-		}
-	      if (is_null(tp))
-		{
-		  tp = list_1(sc, car(p));
-		  np = tp;
-		  sc->temp8 = tp; /* GC protect? */
-		  pp = cdr(p);
-		}
-	      else pp = p;
-	      for (; is_pair(pp); pp = cdr(pp), np = cdr(np))
-		set_cdr(np, list_1(sc, car(pp)));
-	    }
-	  else
-	    {
-	      s7_int len = sequence_length(sc, p);
-	      if (len > 0)
-		{
-		  if (is_null(tp))
-		    {
-		      tp = s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, p, make_list(sc, len, sc->unused)));
-		      np = tp;
-		      sc->temp8 = tp;
-		    }
-		  else set_cdr(np, s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, p, make_list(sc, len, sc->unused))));
-		  for (; is_pair(cdr(np)); np = cdr(np));
-		}
-	      else
-		if (len < 0)
-		  {
-		    unstack_gc_protect(sc);
-		    wrong_type_error_nr(sc, sc->append_symbol, position_of(y, args), p, a_sequence_string);
-		  }}}}
+        {
+          if (is_pair(p))
+            {
+              if (!s7_is_proper_list(sc, p))
+                {
+                  sc->temp8 = sc->unused;
+                  unstack_gc_protect(sc);
+                  wrong_type_error_nr(sc, sc->append_symbol, position_of(y, args), p, a_proper_list_string);
+                }
+              if (is_null(tp))
+                {
+                  tp = list_1(sc, car(p));
+                  np = tp;
+                  sc->temp8 = tp; /* GC protect? */
+                  pp = cdr(p);
+                }
+              else pp = p;
+              for (; is_pair(pp); pp = cdr(pp), np = cdr(np))
+                set_cdr(np, list_1(sc, car(pp)));
+            }
+          else
+            {
+              s7_int len = sequence_length(sc, p);
+              if (len > 0)
+                {
+                  if (is_null(tp))
+                    {
+                      tp = s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, p, make_list(sc, len, sc->unused)));
+                      np = tp;
+                      sc->temp8 = tp;
+                    }
+                  else set_cdr(np, s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, p, make_list(sc, len, sc->unused))));
+                  for (; is_pair(cdr(np)); np = cdr(np));
+                }
+              else
+                if (len < 0)
+                  {
+                    unstack_gc_protect(sc);
+                    wrong_type_error_nr(sc, sc->append_symbol, position_of(y, args), p, a_sequence_string);
+                  }}}}
   unstack_gc_protect(sc);
   return(tp);
 }
@@ -39672,8 +39672,8 @@ static noreturn void typed_vector_type_error_nr(s7_scheme *sc, s7_pointer vec, s
 {
   const char *descr = typed_vector_typer_name(sc, vec);
   error_nr(sc, sc->wrong_type_arg_symbol,
-	   set_elist_4(sc, wrap_string(sc, "vector-set! third argument ~$, is ~A, but the vector's element type checker, ~A, rejects it", 91),
-		       val, type_name_string(sc, val), wrap_string(sc, descr, safe_strlen(descr))));
+           set_elist_4(sc, wrap_string(sc, "vector-set! third argument ~$, is ~A, but the vector's element type checker, ~A, rejects it", 91),
+                       val, type_name_string(sc, val), wrap_string(sc, descr, safe_strlen(descr))));
 }
 
 static inline s7_pointer typed_vector_setter(s7_scheme *sc, s7_pointer vec, s7_int loc, s7_pointer val) /* tstr faster without inline, but tbig slower */
@@ -39809,8 +39809,8 @@ static s7_pointer make_vector_1(s7_scheme *sc, s7_int len, bool filled, uint8_t
     out_of_range_error_nr(sc, sc->make_vector_symbol, int_one, wrap_integer(sc, len), it_is_negative_string);
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-vector length argument ~D is greater than (*s7* 'max-vector-length), ~D", 76),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "make-vector length argument ~D is greater than (*s7* 'max-vector-length), ~D", 76),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
 
   /* this has to follow the error checks! (else garbage in free_heap temps portion confuses GC when "vector" is finalized) */
   new_cell(sc, x, typ | T_SAFE_PROCEDURE);
@@ -39824,56 +39824,56 @@ static s7_pointer make_vector_1(s7_scheme *sc, s7_int len, bool filled, uint8_t
   else
     if (typ == T_VECTOR)
       {
-	block_t *b = inline_mallocate(sc, len * sizeof(s7_pointer));
-	vector_block(x) = b;
-	vector_elements(x) = (s7_pointer *)block_data(b);
-	vector_getter(x) = t_vector_getter;
-	vector_setter(x) = t_vector_setter;
-	if (filled) t_vector_fill(x, sc->nil);
+        block_t *b = inline_mallocate(sc, len * sizeof(s7_pointer));
+        vector_block(x) = b;
+        vector_elements(x) = (s7_pointer *)block_data(b);
+        vector_getter(x) = t_vector_getter;
+        vector_setter(x) = t_vector_setter;
+        if (filled) t_vector_fill(x, sc->nil);
       }
     else
       if (typ == T_FLOAT_VECTOR)
-	{
-	  block_t *b = inline_mallocate(sc, len * sizeof(s7_double));
-	  vector_block(x) = b;
-	  float_vector_floats(x) = (s7_double *)block_data(b);
-	  if (filled)
-	    {
-	      if (STEP_8(len))
-		memclr64((void *)float_vector_floats(x), len * sizeof(s7_double));
-	      else memclr((void *)float_vector_floats(x), len * sizeof(s7_double));
-	    }
-	  vector_getter(x) = float_vector_getter;
-	  vector_setter(x) = float_vector_setter;
-	}
+        {
+          block_t *b = inline_mallocate(sc, len * sizeof(s7_double));
+          vector_block(x) = b;
+          float_vector_floats(x) = (s7_double *)block_data(b);
+          if (filled)
+            {
+              if (STEP_8(len))
+                memclr64((void *)float_vector_floats(x), len * sizeof(s7_double));
+              else memclr((void *)float_vector_floats(x), len * sizeof(s7_double));
+            }
+          vector_getter(x) = float_vector_getter;
+          vector_setter(x) = float_vector_setter;
+        }
       else
-	if (typ == T_INT_VECTOR)
-	  {
-	    block_t *b = inline_mallocate(sc, len * sizeof(s7_int));
-	    vector_block(x) = b;
-	    int_vector_ints(x) = (s7_int *)block_data(b);
-	    if (filled)
-	      {
-		if (STEP_8(len))
-		  memclr64((void *)int_vector_ints(x), len * sizeof(s7_int));
-		else memclr((void *)int_vector_ints(x), len * sizeof(s7_int));
-	      }
-	    vector_getter(x) = int_vector_getter;
-	    vector_setter(x) = int_vector_setter;
-	  }
-	else /* byte-vector */
-	  {
-	    block_t *b = mallocate(sc, len);
-	    vector_block(x) = b;
-	    byte_vector_bytes(x) = (uint8_t *)block_data(b);
-	    vector_getter(x) = byte_vector_getter;
-	    vector_setter(x) = byte_vector_setter;
-	    if (filled)
-	      {
-		if (STEP_64(len))
-		  memclr64((void *)(byte_vector_bytes(x)), len);
-		else memclr((void *)(byte_vector_bytes(x)), len);
-	      }}
+        if (typ == T_INT_VECTOR)
+          {
+            block_t *b = inline_mallocate(sc, len * sizeof(s7_int));
+            vector_block(x) = b;
+            int_vector_ints(x) = (s7_int *)block_data(b);
+            if (filled)
+              {
+                if (STEP_8(len))
+                  memclr64((void *)int_vector_ints(x), len * sizeof(s7_int));
+                else memclr((void *)int_vector_ints(x), len * sizeof(s7_int));
+              }
+            vector_getter(x) = int_vector_getter;
+            vector_setter(x) = int_vector_setter;
+          }
+        else /* byte-vector */
+          {
+            block_t *b = mallocate(sc, len);
+            vector_block(x) = b;
+            byte_vector_bytes(x) = (uint8_t *)block_data(b);
+            vector_getter(x) = byte_vector_getter;
+            vector_setter(x) = byte_vector_setter;
+            if (filled)
+              {
+                if (STEP_64(len))
+                  memclr64((void *)(byte_vector_bytes(x)), len);
+                else memclr((void *)(byte_vector_bytes(x)), len);
+              }}
   vector_set_dimension_info(x, NULL);
   return(x);
 }
@@ -39921,12 +39921,12 @@ static vdims_t *make_vdims(s7_scheme *sc, bool elements_should_be_freed, s7_int
       vdims_rank(v) = dims;
       vdims_offsets(v) = (s7_int *)(vdims_dims(v) + dims);
       for (s7_int i = 0; i < dims; i++)
-	vdims_dims(v)[i] = dim_info[i];
+        vdims_dims(v)[i] = dim_info[i];
       for (s7_int i = dims - 1; i >= 0; i--)
-	{
-	  vdims_offsets(v)[i] = offset;
-	  offset *= vdims_dims(v)[i];
-	}
+        {
+          vdims_offsets(v)[i] = offset;
+          offset *= vdims_dims(v)[i];
+        }
       return(v);
     }
   v = (vdims_t *)mallocate_block(sc);
@@ -39986,7 +39986,7 @@ static Vectorized void float_vector_fill(s7_pointer vec, s7_double x)
   if (x == 0.0)
     {
       if (STEP_8(len))
-	memclr64((void *)float_vector_floats(vec), len * sizeof(s7_double));
+        memclr64((void *)float_vector_floats(vec), len * sizeof(s7_double));
       else memclr((void *)float_vector_floats(vec), len * sizeof(s7_double));
     }
   else
@@ -39994,9 +39994,9 @@ static Vectorized void float_vector_fill(s7_pointer vec, s7_double x)
       s7_int i = 0, left = len - 8;
       s7_double *orig = float_vector_floats(vec);
       while (i <= left)
-	LOOP_8(orig[i++] = x);
+        LOOP_8(orig[i++] = x);
       for (; i < len; i++)
-	orig[i] = x;
+        orig[i] = x;
     }
 }
 
@@ -40007,7 +40007,7 @@ static Vectorized void int_vector_fill(s7_pointer vec, s7_int k)
   if (k == 0)
     {
       if (STEP_8(len))
-	memclr64((void *)int_vector_ints(vec), len * sizeof(s7_int));
+        memclr64((void *)int_vector_ints(vec), len * sizeof(s7_int));
       else memclr((void *)int_vector_ints(vec), len * sizeof(s7_int));
     }
   else
@@ -40015,9 +40015,9 @@ static Vectorized void int_vector_fill(s7_pointer vec, s7_int k)
       s7_int i = 0, left = len - 8;
       s7_int *orig = int_vector_ints(vec);
       while (i <= left)
-	LOOP_8(orig[i++] = k);
+        LOOP_8(orig[i++] = k);
       for (; i < len; i++)
-	orig[i] = k;
+        orig[i] = k;
     }
 }
 
@@ -40039,17 +40039,17 @@ void s7_vector_fill(s7_scheme *sc, s7_pointer vec, s7_pointer obj)
     {
     case T_FLOAT_VECTOR:
       if (!is_real(obj))
-	wrong_type_error_nr(sc, wrap_string(sc, "float-vector fill!", 18), 2, obj, sc->type_names[T_REAL]);
+        wrong_type_error_nr(sc, wrap_string(sc, "float-vector fill!", 18), 2, obj, sc->type_names[T_REAL]);
       float_vector_fill(vec, s7_real(obj));
       break;
     case T_INT_VECTOR:
       if (!s7_is_integer(obj)) /* possibly a bignum */
-	wrong_type_error_nr(sc, wrap_string(sc, "int-vector fill!", 16), 2, obj, sc->type_names[T_INTEGER]);
+        wrong_type_error_nr(sc, wrap_string(sc, "int-vector fill!", 16), 2, obj, sc->type_names[T_INTEGER]);
       int_vector_fill(vec, s7_integer_clamped_if_gmp(sc, obj));
       break;
     case T_BYTE_VECTOR:
       if (!is_byte(obj))
-	wrong_type_error_nr(sc, wrap_string(sc, "byte-vector fill!", 17), 2, obj, wrap_string(sc, "a byte", 6));
+        wrong_type_error_nr(sc, wrap_string(sc, "byte-vector fill!", 17), 2, obj, wrap_string(sc, "a byte", 6));
       byte_vector_fill(vec, (uint8_t)s7_integer_clamped_if_gmp(sc, obj));
       break;
     case T_VECTOR:
@@ -40085,17 +40085,17 @@ static s7_pointer g_vector_fill_1(s7_scheme *sc, s7_pointer caller, s7_pointer a
   if (is_float_vector(x))
     {
       if (!is_real(fill)) /* possibly a bignum */
-	return(method_or_bust(sc, fill, caller, args, sc->type_names[T_REAL], 2));
+        return(method_or_bust(sc, fill, caller, args, sc->type_names[T_REAL], 2));
     }
   else
     if ((is_int_vector(x)) || (is_byte_vector(x)))
       {
-	if (!s7_is_integer(fill))
-	  return(method_or_bust(sc, fill, caller, args, sc->type_names[T_INTEGER], 2));
-	if ((is_byte_vector(x)) &&
-	    ((s7_integer_clamped_if_gmp(sc, fill) < 0) || (s7_integer_clamped_if_gmp(sc, fill) > 255)))
-	  error_nr(sc, sc->out_of_range_symbol,
-		   set_elist_3(sc, wrap_string(sc, "~S second argument, ~S, should fit in an unsigned byte", 54), caller, fill));
+        if (!s7_is_integer(fill))
+          return(method_or_bust(sc, fill, caller, args, sc->type_names[T_INTEGER], 2));
+        if ((is_byte_vector(x)) &&
+            ((s7_integer_clamped_if_gmp(sc, fill) < 0) || (s7_integer_clamped_if_gmp(sc, fill) > 255)))
+          error_nr(sc, sc->out_of_range_symbol,
+                   set_elist_3(sc, wrap_string(sc, "~S second argument, ~S, should fit in an unsigned byte", 54), caller, fill));
       }
   end = vector_length(x);
   if (!is_null(cddr(args)))
@@ -40113,36 +40113,36 @@ static s7_pointer g_vector_fill_1(s7_scheme *sc, s7_pointer caller, s7_pointer a
       for (s7_int i = start; i < end; i++) vector_element(x, i) = fill;
     else
       if (is_int_vector(x))
-	{
-	  s7_int k = s7_integer_clamped_if_gmp(sc, fill);
-	  if (k == 0)
-	    memclr((void *)(int_vector_ints(x) + start), (end - start) * sizeof(s7_int));
-	  else for (s7_int i = start; i < end; i++) int_vector(x, i) = k;
-	}
+        {
+          s7_int k = s7_integer_clamped_if_gmp(sc, fill);
+          if (k == 0)
+            memclr((void *)(int_vector_ints(x) + start), (end - start) * sizeof(s7_int));
+          else for (s7_int i = start; i < end; i++) int_vector(x, i) = k;
+        }
       else
-	if (is_float_vector(x))
-	  {
-	    s7_double y = s7_real(fill);
-	    if (y == 0.0)
-	      memclr((void *)(float_vector_floats(x) + start), (end - start) * sizeof(s7_double));
-	    else
-	      {
-		s7_double *orig = float_vector_floats(x);
-		s7_int left = end - 8;
-		s7_int i = start;
-		while (i <= left)
-		  LOOP_8(orig[i++] = y);
-		for (; i < end; i++)
-		  orig[i] = y;
-	      }}
-	else
-	  if (is_byte_vector(x))
-	    {
-	      uint8_t k = (uint8_t)s7_integer_clamped_if_gmp(sc, fill);
-	      if (k == 0)
-		memclr((void *)(byte_vector_bytes(x) + start), end - start);
-	      else local_memset((void *)(byte_vector_bytes(x) + start), k, end - start);
-	    }
+        if (is_float_vector(x))
+          {
+            s7_double y = s7_real(fill);
+            if (y == 0.0)
+              memclr((void *)(float_vector_floats(x) + start), (end - start) * sizeof(s7_double));
+            else
+              {
+                s7_double *orig = float_vector_floats(x);
+                s7_int left = end - 8;
+                s7_int i = start;
+                while (i <= left)
+                  LOOP_8(orig[i++] = y);
+                for (; i < end; i++)
+                  orig[i] = y;
+              }}
+        else
+          if (is_byte_vector(x))
+            {
+              uint8_t k = (uint8_t)s7_integer_clamped_if_gmp(sc, fill);
+              if (k == 0)
+                memclr((void *)(byte_vector_bytes(x) + start), end - start);
+              else local_memset((void *)(byte_vector_bytes(x) + start), k, end - start);
+            }
   return(fill);
 }
 
@@ -40180,26 +40180,26 @@ static s7_pointer g_vector_append(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer x = car(p);
       if (!is_any_vector(x))
-	{
-	  if (has_active_methods(sc, x))
-	    {
-	      s7_pointer func = find_method_with_let(sc, x, sc->vector_append_symbol);
-	      if (func != sc->undefined)
-		{
-		  int32_t k;
-		  s7_pointer v, y;
-		  if (i == 0)
-		    return(s7_apply_function(sc, func, args));
-		  sc->temp9 = make_list(sc, i, sc->unused); /* we have to copy the arglist here */
-		  for (k = 0, y = args, v = sc->temp9; k < i; k++, y = cdr(y), v = cdr(v))
-		    set_car(v, car(y));
-		  v = g_vector_append(sc, sc->temp9);
-		  y = s7_apply_function(sc, func, set_ulist_1(sc, v, p));
-		  sc->temp9 = sc->unused;
-		  return(y);
-		}}
-	  wrong_type_error_nr(sc, sc->vector_append_symbol, i + 1, x, sc->type_names[T_VECTOR]);
-	}}
+        {
+          if (has_active_methods(sc, x))
+            {
+              s7_pointer func = find_method_with_let(sc, x, sc->vector_append_symbol);
+              if (func != sc->undefined)
+                {
+                  int32_t k;
+                  s7_pointer v, y;
+                  if (i == 0)
+                    return(s7_apply_function(sc, func, args));
+                  sc->temp9 = make_list(sc, i, sc->unused); /* we have to copy the arglist here */
+                  for (k = 0, y = args, v = sc->temp9; k < i; k++, y = cdr(y), v = cdr(v))
+                    set_car(v, car(y));
+                  v = g_vector_append(sc, sc->temp9);
+                  y = s7_apply_function(sc, func, set_ulist_1(sc, v, p));
+                  sc->temp9 = sc->unused;
+                  return(y);
+                }}
+          wrong_type_error_nr(sc, sc->vector_append_symbol, i + 1, x, sc->type_names[T_VECTOR]);
+        }}
   return(vector_append(sc, args, type(car(args)), sc->vector_append_symbol));
 }
 
@@ -40263,7 +40263,7 @@ s7_int s7_vector_dimensions(s7_pointer vec, s7_int *dims, s7_int dims_size)
     {
       s7_int lim = vector_ndims(vec);
       if (lim > dims_size) lim = dims_size;
-      for (s7_int i = 0; i < lim; i++)	dims[i] = vector_dimension(vec, i);
+      for (s7_int i = 0; i < lim; i++)        dims[i] = vector_dimension(vec, i);
       return(lim);
     }
   dims[0] = vector_length(vec);
@@ -40284,7 +40284,7 @@ s7_int s7_vector_offsets(s7_pointer vec, s7_int *offs, s7_int offs_size)
     {
       s7_int lim = vector_ndims(vec);
       if (lim > offs_size) lim = offs_size;
-      for (s7_int i = 0; i < lim; i++)	offs[i] = vector_offset(vec, i);
+      for (s7_int i = 0; i < lim; i++)        offs[i] = vector_offset(vec, i);
       return(lim);
     }
   offs[0] = 1;
@@ -40308,16 +40308,16 @@ static s7_int flatten_multivector_indices(s7_scheme *sc, s7_pointer vector, s7_i
       const s7_int *dimensions = vector_dimensions(vector);
       const s7_int *offsets = vector_offsets(vector);
       for (i = 0, index = 0; i < indices; i++)
-	{
-	  s7_int ind = va_arg(ap, s7_int);
-	  if ((ind < 0) || (ind >= dimensions[i]))
-	    {
-	      va_end(ap);
-	      out_of_range_error_nr(sc, sc->vector_ref_symbol, wrap_integer(sc, i), wrap_integer(sc, ind), (ind < 0) ? it_is_negative_string : it_is_too_large_string);
-	      return(-1);
-	    }
-	  index += (ind * offsets[i]);
-	}}
+        {
+          s7_int ind = va_arg(ap, s7_int);
+          if ((ind < 0) || (ind >= dimensions[i]))
+            {
+              va_end(ap);
+              out_of_range_error_nr(sc, sc->vector_ref_symbol, wrap_integer(sc, i), wrap_integer(sc, ind), (ind < 0) ? it_is_negative_string : it_is_too_large_string);
+              return(-1);
+            }
+          index += (ind * offsets[i]);
+        }}
   va_end(ap);
   return(index);
 }
@@ -40356,22 +40356,22 @@ s7_pointer s7_vector_to_list(s7_scheme *sc, s7_pointer vect)
     case T_VECTOR:
       check_free_heap_size(sc, len);
       for (s7_int i = len - 1; i >= 0; i--)
-	sc->y = cons_unchecked(sc, vector_element(vect, i), sc->y);
+        sc->y = cons_unchecked(sc, vector_element(vect, i), sc->y);
       break;
     case T_BYTE_VECTOR:
       check_free_heap_size(sc, len);
       for (s7_int i = len - 1; i >= 0; i--)
-	sc->y = cons_unchecked(sc, small_int(byte_vector(vect, i)), sc->y);
+        sc->y = cons_unchecked(sc, small_int(byte_vector(vect, i)), sc->y);
       break;
     case T_INT_VECTOR:
       check_free_heap_size(sc, 2 * len);
       for (s7_int i = len - 1; i >= 0; i--)
-	sc->y = cons_unchecked(sc, make_integer_unchecked(sc, int_vector(vect, i)), sc->y);
+        sc->y = cons_unchecked(sc, make_integer_unchecked(sc, int_vector(vect, i)), sc->y);
       break;
     case T_FLOAT_VECTOR:
       check_free_heap_size(sc, 2 * len);
       for (s7_int i = len - 1; i >= 0; i--)
-	sc->y = cons_unchecked(sc, make_real_unchecked(sc, float_vector(vect, i)), sc->y);
+        sc->y = cons_unchecked(sc, make_real_unchecked(sc, float_vector(vect, i)), sc->y);
       break;
     }
   unstack_gc_protect(sc);
@@ -40415,9 +40415,9 @@ static s7_pointer g_vector_to_list(s7_scheme *sc, s7_pointer args)
     }
   if ((end - start) > sc->max_list_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_5(sc, wrap_string(sc, "vector->list length ~D, (- ~D ~D), is greater than (*s7* 'max-list-length), ~D", 78),
-			 wrap_integer(sc, end - start), wrap_integer(sc, end), wrap_integer(sc, start),
-			 wrap_integer(sc, sc->max_list_length)));
+             set_elist_5(sc, wrap_string(sc, "vector->list length ~D, (- ~D ~D), is greater than (*s7* 'max-list-length), ~D", 78),
+                         wrap_integer(sc, end - start), wrap_integer(sc, end), wrap_integer(sc, start),
+                         wrap_integer(sc, sc->max_list_length)));
 
   check_free_heap_size(sc, end - start);
   sc->w = sc->nil;
@@ -40450,8 +40450,8 @@ static s7_pointer g_string_to_byte_vector(s7_scheme *sc, s7_pointer args)
     return(method_or_bust_p(sc, str, sc->string_to_byte_vector_symbol, sc->type_names[T_STRING]));
   if (string_length(str) > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "string->byte-vector string is too long: (> ~D ~D) (*s7* 'max-vector-length)", 75),
-			 wrap_integer(sc, string_length(str)), wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "string->byte-vector string is too long: (> ~D ~D) (*s7* 'max-vector-length)", 75),
+                         wrap_integer(sc, string_length(str)), wrap_integer(sc, sc->max_vector_length)));
   return(s7_copy_1(sc, sc->string_to_byte_vector_symbol, set_plist_2(sc, str, make_simple_byte_vector(sc, string_length(str)))));
 }
 
@@ -40466,8 +40466,8 @@ static s7_pointer g_byte_vector_to_string(s7_scheme *sc, s7_pointer args)
     return(method_or_bust_p(sc, v, sc->byte_vector_to_string_symbol, sc->type_names[T_BYTE_VECTOR]));
   if (byte_vector_length(v) > sc->max_string_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "byte-vector->string byte-vector is too large: (> ~D ~D) (*s7* 'max-string-length)", 81),
-			 wrap_integer(sc, byte_vector_length(v)), wrap_integer(sc, sc->max_string_length)));
+             set_elist_3(sc, wrap_string(sc, "byte-vector->string byte-vector is too large: (> ~D ~D) (*s7* 'max-string-length)", 81),
+                         wrap_integer(sc, byte_vector_length(v)), wrap_integer(sc, sc->max_string_length)));
   return(s7_copy_1(sc, sc->byte_vector_to_string_symbol, set_plist_2(sc, v, make_empty_string(sc, byte_vector_length(v), 0))));
 }
 
@@ -40484,14 +40484,14 @@ static s7_pointer g_vector(s7_scheme *sc, s7_pointer args)
     error_nr(sc, sc->read_error_symbol, set_elist_1(sc, wrap_string(sc, "vector contents list is not a proper list", 41)));
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 71),
-			 args, wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 71),
+                         args, wrap_integer(sc, sc->max_vector_length)));
   vec = make_simple_vector(sc, len);
   if (len > 0)
     {
       s7_pointer x = args;
       for (s7_int i = 0; is_pair(x); x = cdr(x), i++)
-	vector_element(vec, i) = car(x);
+        vector_element(vec, i) = car(x);
     }
   return(vec);
 }
@@ -40543,22 +40543,22 @@ static s7_pointer g_float_vector(s7_scheme *sc, s7_pointer args)
     error_nr(sc, sc->read_error_symbol, set_elist_1(sc, wrap_string(sc, "float-vector contents list is not a proper list", 47)));
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "float-vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 77),
-			 args, wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "float-vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 77),
+                         args, wrap_integer(sc, sc->max_vector_length)));
   vec = make_simple_float_vector(sc, len);
   if (len > 0)
     {
       s7_int i = 0;
       for (s7_pointer x = args; is_pair(x); x = cdr(x), i++)
-	{ /* this used to gc protect vec via sc->w? was that due to very old bignum code in s7_real? */
-	  s7_pointer p = car(x);
-	  if (is_t_real(p))
-	    float_vector(vec, i) = real(p);
-	  else
-	    if (is_real(p))                         /* bignum is ok here */
-	      float_vector(vec, i) = s7_real(p);
-	    else return(method_or_bust(sc, p, sc->float_vector_symbol, args, sc->type_names[T_REAL], i + 1));
-	}}
+        { /* this used to gc protect vec via sc->w? was that due to very old bignum code in s7_real? */
+          s7_pointer p = car(x);
+          if (is_t_real(p))
+            float_vector(vec, i) = real(p);
+          else
+            if (is_real(p))                         /* bignum is ok here */
+              float_vector(vec, i) = s7_real(p);
+            else return(method_or_bust(sc, p, sc->float_vector_symbol, args, sc->type_names[T_REAL], i + 1));
+        }}
   return(vec);
 }
 
@@ -40600,15 +40600,15 @@ static s7_pointer g_int_vector(s7_scheme *sc, s7_pointer args)
     error_nr(sc, sc->read_error_symbol, set_elist_1(sc, wrap_string(sc, "int-vector contents list is not a proper list", 45)));
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "int-vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 75),
-			 args, wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "int-vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 75),
+                         args, wrap_integer(sc, sc->max_vector_length)));
   vec = make_simple_int_vector(sc, len);
   if (len == 0) return(vec);
   for (s7_pointer x = args; is_pair(x); x = cdr(x), i++)
     {
       s7_pointer p = car(x);
       if (!s7_is_integer(p))
-	return(method_or_bust(sc, p, sc->int_vector_symbol, args, sc->type_names[T_INTEGER], i + 1));
+        return(method_or_bust(sc, p, sc->int_vector_symbol, args, sc->type_names[T_INTEGER], i + 1));
       int_vector(vec, i) = s7_integer_clamped_if_gmp(sc, p);
     }
   return(vec);
@@ -40646,8 +40646,8 @@ static s7_pointer g_byte_vector(s7_scheme *sc, s7_pointer args)
     error_nr(sc, sc->read_error_symbol, set_elist_1(sc, wrap_string(sc, "byte-vector contents list is not a proper list", 46)));
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "byte-vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 76),
-			 args, wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "byte-vector has too many arguments: '~S, but (*s7* 'max-vector-length) is ~D", 76),
+                         args, wrap_integer(sc, sc->max_vector_length)));
   vec = make_simple_byte_vector(sc, len);
   str = byte_vector_bytes(vec);
   for (s7_pointer x = args; is_pair(x); i++, x = cdr(x))
@@ -40655,16 +40655,16 @@ static s7_pointer g_byte_vector(s7_scheme *sc, s7_pointer args)
       s7_pointer byte = car(x);
       s7_int b;
       if (is_t_integer(byte))
-	b = integer(byte);
+        b = integer(byte);
       else
 #if WITH_GMP
-	if (is_t_big_integer(byte))
-	  b = big_integer_to_s7_int(sc, big_integer(byte));
-	else
+        if (is_t_big_integer(byte))
+          b = big_integer_to_s7_int(sc, big_integer(byte));
+        else
 #endif
-	  return(method_or_bust(sc, byte, sc->byte_vector_symbol, args, sc->type_names[T_INTEGER], i + 1));
+          return(method_or_bust(sc, byte, sc->byte_vector_symbol, args, sc->type_names[T_INTEGER], i + 1));
       if ((b < 0) || (b > 255))
-	wrong_type_error_nr(sc, sc->byte_vector_symbol, i + 1, byte, an_unsigned_byte_string);
+        wrong_type_error_nr(sc, sc->byte_vector_symbol, i + 1, byte, an_unsigned_byte_string);
       str[i] = (uint8_t)b;
     }
   return(vec);
@@ -40740,12 +40740,12 @@ static s7_pointer g_subvector_position(s7_scheme *sc, s7_pointer args)
        *   Since we currently let the user reset s7_int and s7_double, all four cases have to be handled explicitly.
        */
       switch (type(sv))
-	{
-	case T_VECTOR:       return(make_integer(sc, (s7_int)(vector_elements(sv) - vector_elements(subvector_vector(sv)))));
-	case T_INT_VECTOR:   return(make_integer(sc, (s7_int)(int_vector_ints(sv) - int_vector_ints(subvector_vector(sv)))));
-	case T_FLOAT_VECTOR: return(make_integer(sc, (s7_int)(float_vector_floats(sv) - float_vector_floats(subvector_vector(sv)))));
-	case T_BYTE_VECTOR:  return(make_integer(sc, (s7_int)(byte_vector_bytes(sv) - byte_vector_bytes(subvector_vector(sv)))));
-	}}
+        {
+        case T_VECTOR:       return(make_integer(sc, (s7_int)(vector_elements(sv) - vector_elements(subvector_vector(sv)))));
+        case T_INT_VECTOR:   return(make_integer(sc, (s7_int)(int_vector_ints(sv) - int_vector_ints(subvector_vector(sv)))));
+        case T_FLOAT_VECTOR: return(make_integer(sc, (s7_int)(float_vector_floats(sv) - float_vector_floats(subvector_vector(sv)))));
+        case T_BYTE_VECTOR:  return(make_integer(sc, (s7_int)(byte_vector_bytes(sv) - byte_vector_bytes(subvector_vector(sv)))));
+        }}
   return(sole_arg_method_or_bust(sc, sv, sc->subvector_position_symbol, args, sc->type_names[T_VECTOR]));
 }
 
@@ -40796,7 +40796,7 @@ static s7_pointer subvector(s7_scheme *sc, s7_pointer vect, s7_int skip_dims, s7
       float_vector_floats(x) = (s7_double *)(float_vector_floats(vect) + index);
     else
       if (is_t_vector(vect))
-	vector_elements(x) = (s7_pointer *)(vector_elements(vect) + index);
+        vector_elements(x) = (s7_pointer *)(vector_elements(vect) + index);
       else byte_vector_bytes(x) = (uint8_t *)(byte_vector_bytes(vect) + index);
   add_multivector(sc, x);
   return(x);
@@ -40849,58 +40849,58 @@ a vector that points to the same elements as the original-vector but with differ
     {
       s7_pointer start = cadr(args);
       if (!s7_is_integer(start))
-	return(method_or_bust(sc, start, sc->subvector_symbol, args, sc->type_names[T_INTEGER], 2));
+        return(method_or_bust(sc, start, sc->subvector_symbol, args, sc->type_names[T_INTEGER], 2));
       offset = s7_integer_clamped_if_gmp(sc, start);
       if ((offset < 0) || (offset > orig_len))  /* we need this if, for example, offset == 9223372036854775807 */
-	out_of_range_error_nr(sc, sc->subvector_symbol, int_two, start, (offset < 0) ? it_is_negative_string : it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->subvector_symbol, int_two, start, (offset < 0) ? it_is_negative_string : it_is_too_large_string);
       new_len -= offset;
 
       if (is_pair(cddr(args))) /* get end point in vector */
-	{
-	  s7_pointer end = caddr(args);
-	  s7_int new_end;
-	  if (!s7_is_integer(end))
-	    return(method_or_bust(sc, end, sc->subvector_symbol, args, sc->type_names[T_INTEGER], 3));
-	  new_end = s7_integer_clamped_if_gmp(sc, end);
-	  if ((new_end < 0) || (new_end > orig_len))
-	    out_of_range_error_nr(sc, sc->subvector_symbol, int_three, end, (new_end < 0) ? it_is_negative_string : it_is_too_large_string);
-	  if (offset > new_end)
-	    out_of_range_error_nr(sc, sc->subvector_symbol, int_two, start, wrap_string(sc, "start point > end point", 23));
-	  new_len = new_end - offset;
-
-	  if (is_pair(cdddr(args))) /* get new dimensions */
-	    {
-	      s7_pointer dims = cadddr(args);
-	      if ((is_null(dims)) ||
-		  (!s7_is_proper_list(sc, dims)))
-		return(method_or_bust(sc, dims, sc->subvector_symbol, args, sc->type_names[T_PAIR], 4));
-
-	      for (s7_pointer y = dims; is_pair(y); y = cdr(y))
-		if ((!s7_is_integer(car(y)))        ||       /* (subvector v '((1 2) (3 4))) */
-		    (s7_integer_clamped_if_gmp(sc, car(y)) > orig_len) ||
-		    (s7_integer_clamped_if_gmp(sc, car(y)) < 0))
-		  error_nr(sc, sc->wrong_type_arg_symbol,
-			   set_elist_1(sc, wrap_string(sc, "a subvector must fit in the original vector", 43)));
-
-	      v = list_to_dims(sc, dims);
-	      if (vdims_rank(v) > sc->max_vector_dimensions)
-		{
-		  liberate(sc, v);
-		  error_nr(sc, sc->out_of_range_symbol,
-			   set_elist_3(sc, wrap_string(sc, "subvector specifies too many dimensions: '~S, but (*s7* 'max-vector-dimensions) is ~D", 85),
-				       dims, wrap_integer(sc, sc->max_vector_dimensions)));
-		}
-	      new_len = vdims_dims(v)[0];
-	      for (s7_int i = 1; i < vdims_rank(v); i++) new_len *= vdims_dims(v)[i];
-	      if (new_len != new_end - offset)
-		{
-		  liberate(sc, v); /* 14-Sep-23 */
-		  error_nr(sc, sc->wrong_type_arg_symbol,
-			   set_elist_4(sc, wrap_string(sc, "subvector dimensional length, ~D, does not match the start and end positions: ~S to ~S~%", 88),
-				       wrap_integer(sc, new_len), start, end));
-		}
-	      vdims_original(v) = orig;
-	    }}}
+        {
+          s7_pointer end = caddr(args);
+          s7_int new_end;
+          if (!s7_is_integer(end))
+            return(method_or_bust(sc, end, sc->subvector_symbol, args, sc->type_names[T_INTEGER], 3));
+          new_end = s7_integer_clamped_if_gmp(sc, end);
+          if ((new_end < 0) || (new_end > orig_len))
+            out_of_range_error_nr(sc, sc->subvector_symbol, int_three, end, (new_end < 0) ? it_is_negative_string : it_is_too_large_string);
+          if (offset > new_end)
+            out_of_range_error_nr(sc, sc->subvector_symbol, int_two, start, wrap_string(sc, "start point > end point", 23));
+          new_len = new_end - offset;
+
+          if (is_pair(cdddr(args))) /* get new dimensions */
+            {
+              s7_pointer dims = cadddr(args);
+              if ((is_null(dims)) ||
+                  (!s7_is_proper_list(sc, dims)))
+                return(method_or_bust(sc, dims, sc->subvector_symbol, args, sc->type_names[T_PAIR], 4));
+
+              for (s7_pointer y = dims; is_pair(y); y = cdr(y))
+                if ((!s7_is_integer(car(y)))        ||       /* (subvector v '((1 2) (3 4))) */
+                    (s7_integer_clamped_if_gmp(sc, car(y)) > orig_len) ||
+                    (s7_integer_clamped_if_gmp(sc, car(y)) < 0))
+                  error_nr(sc, sc->wrong_type_arg_symbol,
+                           set_elist_1(sc, wrap_string(sc, "a subvector must fit in the original vector", 43)));
+
+              v = list_to_dims(sc, dims);
+              if (vdims_rank(v) > sc->max_vector_dimensions)
+                {
+                  liberate(sc, v);
+                  error_nr(sc, sc->out_of_range_symbol,
+                           set_elist_3(sc, wrap_string(sc, "subvector specifies too many dimensions: '~S, but (*s7* 'max-vector-dimensions) is ~D", 85),
+                                       dims, wrap_integer(sc, sc->max_vector_dimensions)));
+                }
+              new_len = vdims_dims(v)[0];
+              for (s7_int i = 1; i < vdims_rank(v); i++) new_len *= vdims_dims(v)[i];
+              if (new_len != new_end - offset)
+                {
+                  liberate(sc, v); /* 14-Sep-23 */
+                  error_nr(sc, sc->wrong_type_arg_symbol,
+                           set_elist_4(sc, wrap_string(sc, "subvector dimensional length, ~D, does not match the start and end positions: ~S to ~S~%", 88),
+                                       wrap_integer(sc, new_len), start, end));
+                }
+              vdims_original(v) = orig;
+            }}}
 
   if (is_t_vector(orig))
     mark_function[T_VECTOR] = mark_vector_possibly_shared;
@@ -40922,7 +40922,7 @@ a vector that points to the same elements as the original-vector but with differ
       float_vector_floats(x) = (s7_double *)(float_vector_floats(orig) + offset);
     else
       if (is_t_vector(x))
-	vector_elements(x) = (s7_pointer *)(vector_elements(orig) + offset);
+        vector_elements(x) = (s7_pointer *)(vector_elements(orig) + offset);
       else byte_vector_bytes(x) = (uint8_t *)(byte_vector_bytes(orig) + offset);
   add_multivector(sc, x);
   return(x);
@@ -40941,29 +40941,29 @@ static s7_pointer vector_ref_1(s7_scheme *sc, s7_pointer vect, s7_pointer indice
       s7_int i;
       s7_pointer x;
       for (x = indices, i = 0; (is_not_null(x)) && (i < vector_ndims(vect)); x = cdr(x), i++)
-	{
-	  s7_int n;
-	  s7_pointer p = car(x);
-	  if (!s7_is_integer(p))
-	    return(method_or_bust(sc, p, sc->vector_ref_symbol, set_ulist_1(sc, vect, indices), sc->type_names[T_INTEGER], i + 2));
+        {
+          s7_int n;
+          s7_pointer p = car(x);
+          if (!s7_is_integer(p))
+            return(method_or_bust(sc, p, sc->vector_ref_symbol, set_ulist_1(sc, vect, indices), sc->type_names[T_INTEGER], i + 2));
           n = s7_integer_clamped_if_gmp(sc, p);
-	  if ((n < 0) || (n >= vector_dimension(vect, i)))
-	    out_of_range_error_nr(sc, sc->vector_ref_symbol, wrap_integer(sc, i + 2), p, (n < 0) ? it_is_negative_string : it_is_too_large_string);
+          if ((n < 0) || (n >= vector_dimension(vect, i)))
+            out_of_range_error_nr(sc, sc->vector_ref_symbol, wrap_integer(sc, i + 2), p, (n < 0) ? it_is_negative_string : it_is_too_large_string);
 
-	  index += n * vector_offset(vect, i);
-	}
+          index += n * vector_offset(vect, i);
+        }
       if (is_not_null(x))
-	{
-	  s7_pointer nv;
-	  if (!is_t_vector(vect))
-	    error_nr(sc, sc->wrong_number_of_args_symbol,
-		     set_elist_3(sc, wrap_string(sc, "~S: too many indices: ~S", 24), sc->vector_ref_symbol, copy_proper_list(sc, indices)));
-	  nv = vector_element(vect, index);
-	  return(implicit_index(sc, nv, x));
-	}
+        {
+          s7_pointer nv;
+          if (!is_t_vector(vect))
+            error_nr(sc, sc->wrong_number_of_args_symbol,
+                     set_elist_3(sc, wrap_string(sc, "~S: too many indices: ~S", 24), sc->vector_ref_symbol, copy_proper_list(sc, indices)));
+          nv = vector_element(vect, index);
+          return(implicit_index(sc, nv, x));
+        }
       /* if not enough indices, return a subvector covering whatever is left */
       if (i < vector_ndims(vect))
-	return(subvector(sc, vect, i, index));
+        return(subvector(sc, vect, i, index));
     }
   else
     {
@@ -40971,21 +40971,21 @@ static s7_pointer vector_ref_1(s7_scheme *sc, s7_pointer vect, s7_pointer indice
       /* (let ((hi (make-vector 3 0.0)) (sum 0.0)) (do ((i 0 (+ i 1))) ((= i 3)) (set! sum (+ sum (hi i)))) sum) */
 
       if (!s7_is_integer(p))
-	return(method_or_bust(sc, p, sc->vector_ref_symbol, set_ulist_1(sc, vect, indices), sc->type_names[T_INTEGER], 2));
+        return(method_or_bust(sc, p, sc->vector_ref_symbol, set_ulist_1(sc, vect, indices), sc->type_names[T_INTEGER], 2));
       index = s7_integer_clamped_if_gmp(sc, p);
 
       if ((index < 0) || (index >= vector_length(vect)))
-	out_of_range_error_nr(sc, sc->vector_ref_symbol, int_two, p, (index < 0) ? it_is_negative_string : it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->vector_ref_symbol, int_two, p, (index < 0) ? it_is_negative_string : it_is_too_large_string);
 
       if (is_not_null(cdr(indices)))                /* (let ((L #(#(1 2 3) #(4 5 6)))) (vector-ref L 1 2)) */
-	{
-	  s7_pointer nv;
-	  if (!is_t_vector(vect))
-	    error_nr(sc, sc->wrong_number_of_args_symbol,
-		     set_elist_3(sc, wrap_string(sc, "~S: too many indices: ~S", 24), sc->vector_ref_symbol, copy_proper_list(sc, indices)));
-	  nv = vector_element(vect, index);
-	  return(implicit_pair_index_checked(sc, vect, nv, indices));
-	}}
+        {
+          s7_pointer nv;
+          if (!is_t_vector(vect))
+            error_nr(sc, sc->wrong_number_of_args_symbol,
+                     set_elist_3(sc, wrap_string(sc, "~S: too many indices: ~S", 24), sc->vector_ref_symbol, copy_proper_list(sc, indices)));
+          nv = vector_element(vect, index);
+          return(implicit_pair_index_checked(sc, vect, nv, indices));
+        }}
   return((vector_getter(vect))(sc, vect, index));
 }
 
@@ -41117,21 +41117,21 @@ static s7_pointer g_vector_set(s7_scheme *sc, s7_pointer args)
       s7_pointer x;
       index = 0;
       for (x = cdr(args), i = 0; (is_not_null(cdr(x))) && (i < vector_ndims(vec)); x = cdr(x), i++)
-	{
-	  s7_int n;
-	  s7_pointer p = car(x);
-	  if (!s7_is_integer(p))
-	    return(method_or_bust(sc, p, sc->vector_set_symbol, args, sc->type_names[T_INTEGER], i + 2));
+        {
+          s7_int n;
+          s7_pointer p = car(x);
+          if (!s7_is_integer(p))
+            return(method_or_bust(sc, p, sc->vector_set_symbol, args, sc->type_names[T_INTEGER], i + 2));
           n = s7_integer_clamped_if_gmp(sc, p);
-	  if ((n < 0) || (n >= vector_dimension(vec, i)))
-	    out_of_range_error_nr(sc, sc->vector_set_symbol, wrap_integer(sc, i + 2), p, (n < 0) ? it_is_negative_string : it_is_too_large_string);
+          if ((n < 0) || (n >= vector_dimension(vec, i)))
+            out_of_range_error_nr(sc, sc->vector_set_symbol, wrap_integer(sc, i + 2), p, (n < 0) ? it_is_negative_string : it_is_too_large_string);
 
-	  index += n * vector_offset(vec, i);
-	}
+          index += n * vector_offset(vec, i);
+        }
       if (is_not_null(cdr(x)))
-	wrong_number_of_arguments_error_nr(sc, "too many arguments for vector-set!: ~S", 38, args);
+        wrong_number_of_arguments_error_nr(sc, "too many arguments for vector-set!: ~S", 38, args);
       if (i != vector_ndims(vec))
-	wrong_number_of_arguments_error_nr(sc, "not enough arguments for vector-set!: ~S", 40, args);
+        wrong_number_of_arguments_error_nr(sc, "not enough arguments for vector-set!: ~S", 40, args);
 
       /* since vector-ref can return a subvector (if not passed enough args), it might be interesting to
        *   also set a complete subvector via set!, but would that introduce ambiguity?  Only copy the vector
@@ -41146,18 +41146,18 @@ static s7_pointer g_vector_set(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer p = cadr(args);
       if (!s7_is_integer(p))
-	return(method_or_bust(sc, p, sc->vector_set_symbol, args, sc->type_names[T_INTEGER], 2));
+        return(method_or_bust(sc, p, sc->vector_set_symbol, args, sc->type_names[T_INTEGER], 2));
       index = s7_integer_clamped_if_gmp(sc, p);
       if ((index < 0) || (index >= vector_length(vec)))
-	out_of_range_error_nr(sc, sc->vector_set_symbol, int_two, p, (index < 0) ? it_is_negative_string : it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->vector_set_symbol, int_two, p, (index < 0) ? it_is_negative_string : it_is_too_large_string);
 
       if (is_not_null(cdddr(args)))
-	{
-	  s7_pointer v = vector_getter(vec)(sc, vec, index);
-	  if (!is_any_vector(v))
-	    wrong_number_of_arguments_error_nr(sc, "too many arguments for vector-set!: ~S", 38, args);
-	  return(g_vector_set(sc, set_ulist_1(sc, v, cddr(args))));
-	}
+        {
+          s7_pointer v = vector_getter(vec)(sc, vec, index);
+          if (!is_any_vector(v))
+            wrong_number_of_arguments_error_nr(sc, "too many arguments for vector-set!: ~S", 38, args);
+          return(g_vector_set(sc, set_ulist_1(sc, v, cddr(args))));
+        }
       val = caddr(args);
     }
   if (is_typed_t_vector(vec))
@@ -41199,7 +41199,7 @@ static s7_pointer vector_set_p_piip(s7_scheme *sc, s7_pointer v, s7_int i1, s7_i
   if (is_t_vector(v))
     {
       if (is_typed_vector(v))
-	return(typed_vector_setter(sc, v, i2 + (i1 * vector_offset(v, 0)), p));
+        return(typed_vector_setter(sc, v, i2 + (i1 * vector_offset(v, 0)), p));
       vector_element(v, i2 + (i1 * vector_offset(v, 0))) = p;
     }
   else vector_setter(v)(sc, v, i2 + (i1 * vector_offset(v, 0)), p);
@@ -41329,20 +41329,20 @@ static s7_int multivector_length(s7_scheme *sc, s7_pointer x, s7_pointer caller)
     wrong_type_error_nr(sc, caller, 1, x, a_proper_list_string);
   if (dims > sc->max_vector_dimensions)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~S specifies too many dimensions: '~S, but (*s7* 'max-vector-dimensions) is ~D", 78),
-			 x, wrap_integer(sc, sc->max_vector_dimensions)));
+             set_elist_3(sc, wrap_string(sc, "~S specifies too many dimensions: '~S, but (*s7* 'max-vector-dimensions) is ~D", 78),
+                         x, wrap_integer(sc, sc->max_vector_dimensions)));
   for (y = x, len = 1; is_pair(y); y = cdr(y))
     {
       if (!s7_is_integer(car(y)))
-	wrong_type_error_nr(sc, caller, position_of(y, x), car(y), sc->type_names[T_INTEGER]);
+        wrong_type_error_nr(sc, caller, position_of(y, x), car(y), sc->type_names[T_INTEGER]);
 #if HAVE_OVERFLOW_CHECKS
       if (multiply_overflow(len, s7_integer_clamped_if_gmp(sc, car(y)), &len)) /* or better perhaps len > sc->max_vector_length */
-	out_of_range_error_nr(sc, caller, wrap_integer(sc, position_of(y, x)), car(y), it_is_too_large_string);
+        out_of_range_error_nr(sc, caller, wrap_integer(sc, position_of(y, x)), car(y), it_is_too_large_string);
 #else
       len *= s7_integer_clamped_if_gmp(sc, car(y));
 #endif
       if (len < 0)
-	wrong_type_error_nr(sc, caller, position_of(y, x), car(y), a_non_negative_integer_string);
+        wrong_type_error_nr(sc, caller, position_of(y, x), car(y), a_non_negative_integer_string);
     }
   return(len);
 }
@@ -41381,14 +41381,14 @@ static s7_pointer g_make_vector_1(s7_scheme *sc, s7_pointer args, s7_pointer cal
     {
       len = s7_integer_clamped_if_gmp(sc, x);
       if (len < 0)
-	wrong_type_error_nr(sc, caller, 1, x, a_non_negative_integer_string);
+        wrong_type_error_nr(sc, caller, 1, x, a_non_negative_integer_string);
     }
   else
     {
       if (!(is_pair(x)))
-	return(method_or_bust(sc, x, caller, args, wrap_string(sc, "an integer or a list of integers", 32), 1));
+        return(method_or_bust(sc, x, caller, args, wrap_string(sc, "an integer or a list of integers", 32), 1));
       if (!s7_is_integer(car(x)))
-	wrong_type_error_nr(sc, caller, 1, car(x), sc->type_names[T_INTEGER]);
+        wrong_type_error_nr(sc, caller, 1, car(x), sc->type_names[T_INTEGER]);
       len = (is_null(cdr(x))) ? s7_integer_clamped_if_gmp(sc, car(x)) : multivector_length(sc, x, caller);
     }
 
@@ -41396,48 +41396,48 @@ static s7_pointer g_make_vector_1(s7_scheme *sc, s7_pointer args, s7_pointer cal
     {
       fill = cadr(args);
       if (caller == sc->make_int_vector_symbol)
-	result_type = T_INT_VECTOR;
+        result_type = T_INT_VECTOR;
       else
-	if (caller == sc->make_float_vector_symbol)
-	  result_type = T_FLOAT_VECTOR;
-	else
-	  if (caller == sc->make_byte_vector_symbol)
-	    result_type = T_BYTE_VECTOR;
+        if (caller == sc->make_float_vector_symbol)
+          result_type = T_FLOAT_VECTOR;
+        else
+          if (caller == sc->make_byte_vector_symbol)
+            result_type = T_BYTE_VECTOR;
       if (is_pair(cddr(args)))
-	{
-	  typf = caddr(args);
-	  if ((!is_c_function(typf)) &&
-	      (!is_any_closure(typf)) &&
-	      (typf != sc->T))  /* default value */
-	    wrong_type_error_nr(sc, caller, 3, typf, wrap_string(sc, "a built-in procedure, a closure or #t", 37));
-	  if (is_any_closure(typf))
-	    {
-	      if (!is_symbol(find_closure(sc, typf, closure_let(typf))))
-		wrong_type_error_nr(sc, caller, 3, typf, wrap_string(sc, "a named function", 16));
-	      /* the name is needed primarily by the error handler: "vector-set! third argument, ..., is a ... but should be a <...>" */
-	    }
-	  else
-	    if (is_c_function(typf))
-	      {
-		if (typf == global_value(sc->is_float_symbol))
-		  {
-		    if (!is_real(fill)) wrong_type_error_nr(sc, caller, 2, fill, sc->type_names[T_REAL]);
-		    result_type = T_FLOAT_VECTOR;
-		  }
-		else
-		  if (typf == global_value(sc->is_integer_symbol))
-		    {
-		      if (!s7_is_integer(fill)) wrong_type_error_nr(sc, caller, 2, fill, sc->type_names[T_INTEGER]);
-		      result_type = (WITH_GMP) ? T_VECTOR : T_INT_VECTOR;
-		    }
-		  else
-		    if (typf == global_value(sc->is_byte_symbol))
-		      {
-			if (!is_byte(fill)) wrong_type_error_nr(sc, caller, 2, fill, an_unsigned_byte_string);
-			result_type = T_BYTE_VECTOR;
-		      }
-		    else check_vector_typer_c_function(sc, caller, typf);
-	      }}}
+        {
+          typf = caddr(args);
+          if ((!is_c_function(typf)) &&
+              (!is_any_closure(typf)) &&
+              (typf != sc->T))  /* default value */
+            wrong_type_error_nr(sc, caller, 3, typf, wrap_string(sc, "a built-in procedure, a closure or #t", 37));
+          if (is_any_closure(typf))
+            {
+              if (!is_symbol(find_closure(sc, typf, closure_let(typf))))
+                wrong_type_error_nr(sc, caller, 3, typf, wrap_string(sc, "a named function", 16));
+              /* the name is needed primarily by the error handler: "vector-set! third argument, ..., is a ... but should be a <...>" */
+            }
+          else
+            if (is_c_function(typf))
+              {
+                if (typf == global_value(sc->is_float_symbol))
+                  {
+                    if (!is_real(fill)) wrong_type_error_nr(sc, caller, 2, fill, sc->type_names[T_REAL]);
+                    result_type = T_FLOAT_VECTOR;
+                  }
+                else
+                  if (typf == global_value(sc->is_integer_symbol))
+                    {
+                      if (!s7_is_integer(fill)) wrong_type_error_nr(sc, caller, 2, fill, sc->type_names[T_INTEGER]);
+                      result_type = (WITH_GMP) ? T_VECTOR : T_INT_VECTOR;
+                    }
+                  else
+                    if (typf == global_value(sc->is_byte_symbol))
+                      {
+                        if (!is_byte(fill)) wrong_type_error_nr(sc, caller, 2, fill, an_unsigned_byte_string);
+                        result_type = T_BYTE_VECTOR;
+                      }
+                    else check_vector_typer_c_function(sc, caller, typf);
+              }}}
   /* before making the new vector, if fill is specified and the vector is typed, we have to check for a type error.
    *    otherwise we can end up with a vector whose elements are NULL, causing a segfault in the gc.
    */
@@ -41457,8 +41457,8 @@ static s7_pointer g_make_vector_1(s7_scheme *sc, s7_pointer args, s7_pointer cal
       typed_vector_set_typer(vec, typf);
 
       if ((is_c_function(typf)) &&
-	  (c_function_has_simple_elements(typf)))
-	set_has_simple_elements(vec);
+          (c_function_has_simple_elements(typf)))
+        set_has_simple_elements(vec);
     }
   s7_vector_fill(sc, vec, fill);
   if ((is_pair(x)) &&
@@ -41476,8 +41476,8 @@ To create a multidimensional vector, put the dimension bounds in a list (this is
 returns a 2 dimensional vector of 6 total elements, all initialized to 1.0. The 'type argument can set the element type. \
 It is a function that checks the new value, returning #f if the value is not acceptable: (make-vector 8 1/2 rational?)."
   #define Q_make_vector s7_make_signature(sc, 4, sc->is_vector_symbol, \
-					  s7_make_signature(sc, 2, sc->is_integer_symbol, sc->is_pair_symbol), sc->T, \
-					  s7_make_signature(sc, 2, sc->is_procedure_symbol, sc->is_boolean_symbol))
+                                          s7_make_signature(sc, 2, sc->is_integer_symbol, sc->is_pair_symbol), sc->T, \
+                                          s7_make_signature(sc, 2, sc->is_procedure_symbol, sc->is_boolean_symbol))
   return(g_make_vector_1(sc, args, sc->make_vector_symbol));
 }
 
@@ -41496,30 +41496,30 @@ static s7_pointer g_make_float_vector(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer init;
       if (is_pair(cdr(args)))
-	{
-	  init = cadr(args);
-	  if (!is_real(init))
-	    return(method_or_bust(sc, init, sc->make_float_vector_symbol, args, sc->type_names[T_REAL], 2));
+        {
+          init = cadr(args);
+          if (!is_real(init))
+            return(method_or_bust(sc, init, sc->make_float_vector_symbol, args, sc->type_names[T_REAL], 2));
 #if WITH_GMP
-	  if (s7_is_bignum(init))
-	    return(g_make_vector_1(sc, set_plist_2(sc, p, wrap_real(sc, s7_real(init))), sc->make_float_vector_symbol));
+          if (s7_is_bignum(init))
+            return(g_make_vector_1(sc, set_plist_2(sc, p, wrap_real(sc, s7_real(init))), sc->make_float_vector_symbol));
 #endif
-	  if (is_rational(init))
-	    return(g_make_vector_1(sc, set_plist_2(sc, p, wrap_real(sc, rational_to_double(sc, init))), sc->make_float_vector_symbol));
-	}
+          if (is_rational(init))
+            return(g_make_vector_1(sc, set_plist_2(sc, p, wrap_real(sc, rational_to_double(sc, init))), sc->make_float_vector_symbol));
+        }
       else init = real_zero;
       if (s7_is_integer(p))
-	len = s7_integer_clamped_if_gmp(sc, p);
+        len = s7_integer_clamped_if_gmp(sc, p);
       else
-	{
-	  if (!is_pair(p))
-	    return(method_or_bust(sc, p, sc->make_float_vector_symbol, args, wrap_string(sc, "an integer or a list of integers", 32), 1));
-	  len = multivector_length(sc, p, sc->make_float_vector_symbol);
-	}
+        {
+          if (!is_pair(p))
+            return(method_or_bust(sc, p, sc->make_float_vector_symbol, args, wrap_string(sc, "an integer or a list of integers", 32), 1));
+          len = multivector_length(sc, p, sc->make_float_vector_symbol);
+        }
       x = make_vector_1(sc, len, NOT_FILLED, T_FLOAT_VECTOR);
       float_vector_fill(x, s7_real(init));
       if (!s7_is_integer(p))
-	return(make_multivector(sc, x, p));
+        return(make_multivector(sc, x, p));
       add_vector(sc, x);
       return(x);
     }
@@ -41529,8 +41529,8 @@ static s7_pointer g_make_float_vector(s7_scheme *sc, s7_pointer args)
     out_of_range_error_nr(sc, sc->make_float_vector_symbol, int_one, p, it_is_negative_string);
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-float-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 81),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "make-float-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 81),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
 
   arr = mallocate_vector(sc, len * sizeof(s7_double));
   new_cell(sc, x, T_FLOAT_VECTOR | T_SAFE_PROCEDURE);
@@ -41540,7 +41540,7 @@ static s7_pointer g_make_float_vector(s7_scheme *sc, s7_pointer args)
   if (len > 0)
     {
       if (STEP_8(len))
-	memclr64((void *)float_vector_floats(x), len * sizeof(s7_double));
+        memclr64((void *)float_vector_floats(x), len * sizeof(s7_double));
       else memclr((void *)float_vector_floats(x), len * sizeof(s7_double));
     }
   vector_set_dimension_info(x, NULL);
@@ -41579,24 +41579,24 @@ static s7_pointer g_make_int_vector(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer init;
       if (is_pair(cdr(args)))
-	{
-	  init = cadr(args);
-	  if (!s7_is_integer(init))
-	    return(method_or_bust(sc, init, sc->make_int_vector_symbol, args, sc->type_names[T_INTEGER], 2));
-	}
+        {
+          init = cadr(args);
+          if (!s7_is_integer(init))
+            return(method_or_bust(sc, init, sc->make_int_vector_symbol, args, sc->type_names[T_INTEGER], 2));
+        }
       else init = int_zero;
       if (s7_is_integer(p))
-	len = s7_integer_clamped_if_gmp(sc, p);
+        len = s7_integer_clamped_if_gmp(sc, p);
       else
-	{
-	  if (!is_pair(p))
-	    return(method_or_bust(sc, p, sc->make_int_vector_symbol, args, wrap_string(sc, "an integer or a list of integers", 32), 1));
-	  len = multivector_length(sc, p, sc->make_int_vector_symbol);
-	}
+        {
+          if (!is_pair(p))
+            return(method_or_bust(sc, p, sc->make_int_vector_symbol, args, wrap_string(sc, "an integer or a list of integers", 32), 1));
+          len = multivector_length(sc, p, sc->make_int_vector_symbol);
+        }
       x = make_vector_1(sc, len, NOT_FILLED, T_INT_VECTOR);
       int_vector_fill(x, s7_integer_clamped_if_gmp(sc, init));
       if (!s7_is_integer(p))
-	return(make_multivector(sc, x, p));
+        return(make_multivector(sc, x, p));
       add_vector(sc, x);
       return(x);
     }
@@ -41606,8 +41606,8 @@ static s7_pointer g_make_int_vector(s7_scheme *sc, s7_pointer args)
     out_of_range_error_nr(sc, sc->make_int_vector_symbol, int_one, p, it_is_negative_string);
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-int-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 79),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "make-int-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 79),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
 
   arr = mallocate_vector(sc, len * sizeof(s7_int));
   new_cell(sc, x, T_INT_VECTOR | T_SAFE_PROCEDURE);
@@ -41617,7 +41617,7 @@ static s7_pointer g_make_int_vector(s7_scheme *sc, s7_pointer args)
   if (len > 0)
     {
       if (STEP_8(len))
-	memclr64((void *)int_vector_ints(x), len * sizeof(s7_int));
+        memclr64((void *)int_vector_ints(x), len * sizeof(s7_int));
       else memclr((void *)int_vector_ints(x), len * sizeof(s7_int));
     }
   vector_set_dimension_info(x, NULL);
@@ -41649,23 +41649,23 @@ static s7_pointer g_make_byte_vector(s7_scheme *sc, s7_pointer args)
   if (!is_pair(p))
     {
       if (!s7_is_integer(p))
-	return(method_or_bust(sc, p, sc->make_byte_vector_symbol, args, sc->type_names[T_INTEGER], 1));
+        return(method_or_bust(sc, p, sc->make_byte_vector_symbol, args, sc->type_names[T_INTEGER], 1));
       len = s7_integer_clamped_if_gmp(sc, p);
       if (len < 0)
-	out_of_range_error_nr(sc, sc->make_byte_vector_symbol, int_one, p, it_is_negative_string);
+        out_of_range_error_nr(sc, sc->make_byte_vector_symbol, int_one, p, it_is_negative_string);
       if (len > sc->max_vector_length)
-	error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-byte-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 80),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
+        error_nr(sc, sc->out_of_range_symbol,
+             set_elist_3(sc, wrap_string(sc, "make-byte-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 80),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
     }
   if (is_pair(cdr(args)))
     {
       init = cadr(args);
       if (!s7_is_integer(init))
-	return(method_or_bust(sc, init, sc->make_byte_vector_symbol, args, sc->type_names[T_INTEGER], 2));
+        return(method_or_bust(sc, init, sc->make_byte_vector_symbol, args, sc->type_names[T_INTEGER], 2));
       ib = s7_integer_clamped_if_gmp(sc, init);
       if ((ib < 0) || (ib > 255))
-	wrong_type_error_nr(sc, sc->make_byte_vector_symbol, 2, init, an_unsigned_byte_string);
+        wrong_type_error_nr(sc, sc->make_byte_vector_symbol, 2, init, an_unsigned_byte_string);
     }
   else init = int_zero;
 
@@ -41685,8 +41685,8 @@ static s7_pointer make_byte_vector_p_ii(s7_scheme *sc, s7_int len, s7_int init)
     out_of_range_error_nr(sc, sc->make_byte_vector_symbol, int_one, wrap_integer(sc, len), it_is_negative_string);
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "make-byte-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 80),
-			 wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
+             set_elist_3(sc, wrap_string(sc, "make-byte-vector first argument ~D is greater than (*s7* 'max-vector-length), ~D", 80),
+                         wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
   if ((init < 0) || (init > 255))
     wrong_type_error_nr(sc, sc->make_byte_vector_symbol, 2, wrap_integer(sc, init), an_unsigned_byte_string);
   p = make_simple_byte_vector(sc, len);
@@ -41734,11 +41734,11 @@ static s7_pointer g_vector_dimension(s7_scheme *sc, s7_pointer args)
   n = s7_integer_clamped_if_gmp(sc, np);
   if (n < 0)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_2(sc, wrap_string(sc, "vector-dimension second argument is negative: ~S", 48), np));
+             set_elist_2(sc, wrap_string(sc, "vector-dimension second argument is negative: ~S", 48), np));
   if (n >= vector_rank(v))
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "vector-dimension second argument, ~S, should be less than the vector rank, ~D", 77),
-			 np, wrap_integer(sc, vector_rank(v))));
+             set_elist_3(sc, wrap_string(sc, "vector-dimension second argument, ~S, should be less than the vector rank, ~D", 77),
+                         np, wrap_integer(sc, vector_rank(v))));
   if (vector_has_dimension_info(v))
     return(make_integer(sc, vector_dimension(v, n)));
   return(make_integer(sc, vector_length(v)));
@@ -41795,36 +41795,36 @@ static s7_pointer g_set_vector_typer(s7_scheme *sc, s7_pointer args)
   if (!is_t_vector(v))
     {
       if (((is_int_vector(v)) && (typer != global_value(sc->is_integer_symbol))) ||
-	  ((is_float_vector(v)) && (typer != global_value(sc->is_float_symbol))) ||
-	  ((is_byte_vector(v)) && (typer != global_value(sc->is_byte_symbol))))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, wrap_string(sc, "vector-typer can't set ~S typer to ~S", 37), v, typer));
+          ((is_float_vector(v)) && (typer != global_value(sc->is_float_symbol))) ||
+          ((is_byte_vector(v)) && (typer != global_value(sc->is_byte_symbol))))
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, wrap_string(sc, "vector-typer can't set ~S typer to ~S", 37), v, typer));
       return(typer);
     }
   if (is_boolean(typer))
     {
       if (is_typed_vector(v))
-	{
-	  typed_vector_set_typer(v, sc->F);
-	  clear_typed_vector(v);
-	  clear_has_simple_elements(v); /* 15-Oct-23 */
-	}}
+        {
+          typed_vector_set_typer(v, sc->F);
+          clear_typed_vector(v);
+          clear_has_simple_elements(v); /* 15-Oct-23 */
+        }}
   else
     {
       if (is_c_function(typer))
-	check_vector_typer_c_function(sc, sc->vector_typer_symbol, typer); /* this is just error checking */
+        check_vector_typer_c_function(sc, sc->vector_typer_symbol, typer); /* this is just error checking */
       else
-	{
-	  if (!is_any_closure(typer))
-	    wrong_type_error_nr(sc, sc->vector_typer_symbol, 2, typer, wrap_string(sc, "a built-in procedure, a closure, #f or #t", 41));
-	  if (!is_symbol(find_closure(sc, typer, closure_let(typer))))
-	    wrong_type_error_nr(sc, sc->vector_typer_symbol, 2, typer, wrap_string(sc, "a named function", 16));
-	  /* the name is needed primarily by the error handler: "vector-set! second argument, ..., is a ... but should be a <...>" */
-	}
+        {
+          if (!is_any_closure(typer))
+            wrong_type_error_nr(sc, sc->vector_typer_symbol, 2, typer, wrap_string(sc, "a built-in procedure, a closure, #f or #t", 41));
+          if (!is_symbol(find_closure(sc, typer, closure_let(typer))))
+            wrong_type_error_nr(sc, sc->vector_typer_symbol, 2, typer, wrap_string(sc, "a named function", 16));
+          /* the name is needed primarily by the error handler: "vector-set! second argument, ..., is a ... but should be a <...>" */
+        }
       set_typed_vector(v);
       typed_vector_set_typer(v, typer);
       if ((is_c_function(typer)) &&
-	  (c_function_has_simple_elements(typer)))
-	set_has_simple_elements(v);
+          (c_function_has_simple_elements(typer)))
+        set_has_simple_elements(v);
       else clear_has_simple_elements(v); /* 15-Oct-23 */
       }
   return(typer);
@@ -41845,14 +41845,14 @@ static int32_t traverse_vector_data(s7_scheme *sc, s7_pointer vec, s7_int flat_r
   for (s7_int i = 0; i < sizes[dimension]; i++, x = cdr(x))
     {
       if (!is_pair(x))
-	return(MULTIVECTOR_NOT_ENOUGH_ELEMENTS);
+        return(MULTIVECTOR_NOT_ENOUGH_ELEMENTS);
       if (dimension == (dimensions - 1))
-	vector_setter(vec)(sc, vec, flat_ref++, car(x));
+        vector_setter(vec)(sc, vec, flat_ref++, car(x));
       else
-	{
-	  flat_ref = traverse_vector_data(sc, vec, flat_ref, dimension + 1, dimensions, sizes, car(x));
-	  if (flat_ref < 0) return(flat_ref);
-	}}
+        {
+          flat_ref = traverse_vector_data(sc, vec, flat_ref, dimension + 1, dimensions, sizes, car(x));
+          if (flat_ref < 0) return(flat_ref);
+        }}
   return((is_null(x)) ? flat_ref : MULTIVECTOR_TOO_MANY_ELEMENTS);
 }
 
@@ -41875,8 +41875,8 @@ static s7_pointer proper_list_reverse_in_place(s7_scheme *sc, s7_pointer list)
 static noreturn void multivector_error_nr(s7_scheme *sc, const char *message, s7_pointer data)
 {
   error_nr(sc, sc->read_error_symbol,
-	   set_elist_3(sc, wrap_string(sc, "reading constant vector, ~A: ~A", 31),
-		       s7_make_string_wrapper(sc, message), data));
+           set_elist_3(sc, wrap_string(sc, "reading constant vector, ~A: ~A", 31),
+                       s7_make_string_wrapper(sc, message), data));
 }
 
 static s7_pointer g_multivector(s7_scheme *sc, s7_int dims, s7_pointer data)
@@ -41897,12 +41897,12 @@ static s7_pointer g_multivector(s7_scheme *sc, s7_int dims, s7_pointer data)
 
   if (dims <= 0)      /* #0d(...) #2147483649D() [if dims is int32_t this is negative] */
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_2(sc, wrap_string(sc, "#nD(...) dimensions, ~A, should be 1 or more", 44), wrap_integer(sc, dims)));
+             set_elist_2(sc, wrap_string(sc, "#nD(...) dimensions, ~A, should be 1 or more", 44), wrap_integer(sc, dims)));
 
   if (dims > sc->max_vector_dimensions) /* probably can't happen -- caught in read_sharp? */
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_3(sc, wrap_string(sc, "#nD(...) dimensions, ~D, should be less that (*s7* 'max-vector-dimensions): ~D", 78),
-			 wrap_integer(sc, dims), wrap_integer(sc, sc->max_vector_dimensions)));
+             set_elist_3(sc, wrap_string(sc, "#nD(...) dimensions, ~D, should be less that (*s7* 'max-vector-dimensions): ~D", 78),
+                         wrap_integer(sc, dims), wrap_integer(sc, sc->max_vector_dimensions)));
   sc->w = sc->nil;
   if (is_null(data))  /* dims are already 0 (calloc above) */
     return(g_make_vector(sc, set_plist_1(sc, make_list(sc, dims, int_zero))));
@@ -41914,11 +41914,11 @@ static s7_pointer g_multivector(s7_scheme *sc, s7_int dims, s7_pointer data)
       sc->w = cons(sc, make_integer(sc, sizes[i]), sc->w);
       x = car(x);
       if ((i < (dims - 1)) &&
-	  (!is_pair(x)))
-	{
-	  free(sizes);
-	  multivector_error_nr(sc, "we need a list that fully specifies the vector's elements", data);
-	}}
+          (!is_pair(x)))
+        {
+          free(sizes);
+          multivector_error_nr(sc, "we need a list that fully specifies the vector's elements", data);
+        }}
 
   vec = g_make_vector(sc, set_plist_1(sc, sc->w = proper_list_reverse_in_place(sc, sc->w)));
   vec_loc = gc_protect_1(sc, vec);
@@ -41988,17 +41988,17 @@ static Vectorized s7_pointer s7_vector_copy_1(s7_scheme *sc, s7_pointer old_vect
     {
       s7_pointer *src = (s7_pointer *)vector_elements(old_vect), *dst;
       if ((is_typed_vector(old_vect)) && (len > 0)) /* preserve the type info as well */
-	{
-	  if (vector_rank(old_vect) > 1)
-	    new_vect = g_make_vector(sc, set_plist_3(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)),
-						     vector_element(old_vect, 0), typed_vector_typer(old_vect)));
-	  else new_vect = g_make_vector(sc, set_plist_3(sc, make_integer(sc, len),
-							vector_element(old_vect, 0), typed_vector_typer(old_vect)));
-	}
+        {
+          if (vector_rank(old_vect) > 1)
+            new_vect = g_make_vector(sc, set_plist_3(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)),
+                                                     vector_element(old_vect, 0), typed_vector_typer(old_vect)));
+          else new_vect = g_make_vector(sc, set_plist_3(sc, make_integer(sc, len),
+                                                        vector_element(old_vect, 0), typed_vector_typer(old_vect)));
+        }
       else
-	if (vector_rank(old_vect) > 1)
-	  new_vect = g_make_vector(sc, set_plist_1(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect))));
-	else new_vect = make_simple_vector(sc, len);
+        if (vector_rank(old_vect) > 1)
+          new_vect = g_make_vector(sc, set_plist_1(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect))));
+        else new_vect = make_simple_vector(sc, len);
       /* here and in vector-fill! we have a problem with bignums -- should new bignums be allocated? (copy_proper_list also) */
       dst = (s7_pointer *)vector_elements(new_vect);
       for (s7_int i = len; i > 0; i--) *dst++ = *src++;
@@ -42010,7 +42010,7 @@ static Vectorized s7_pointer s7_vector_copy_1(s7_scheme *sc, s7_pointer old_vect
       const s7_double *src = (s7_double *)float_vector_floats(old_vect);
       s7_double *dst;
       if (vector_rank(old_vect) > 1)
-	new_vect = g_make_vector_1(sc, set_plist_2(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)), real_zero), sc->make_float_vector_symbol);
+        new_vect = g_make_vector_1(sc, set_plist_2(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)), real_zero), sc->make_float_vector_symbol);
       else new_vect = make_simple_float_vector(sc, len);
       dst = (s7_double *)float_vector_floats(new_vect);
       for (s7_int i = len; i > 0; i--) *dst++ = *src++;  /* same speed as memcpy(dst, src, len * sizeof(s7_double)); */
@@ -42022,7 +42022,7 @@ static Vectorized s7_pointer s7_vector_copy_1(s7_scheme *sc, s7_pointer old_vect
       const s7_int *src = (s7_int *)int_vector_ints(old_vect);
       s7_int *dst;
       if (vector_rank(old_vect) > 1)
-	new_vect = g_make_vector_1(sc, set_plist_2(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)), int_zero), sc->make_int_vector_symbol);
+        new_vect = g_make_vector_1(sc, set_plist_2(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)), int_zero), sc->make_int_vector_symbol);
       else new_vect = make_simple_int_vector(sc, len);
       dst = (s7_int *)int_vector_ints(new_vect);
       for (s7_int i = len; i > 0; i--) *dst++ = *src++;
@@ -42034,7 +42034,7 @@ static Vectorized s7_pointer s7_vector_copy_1(s7_scheme *sc, s7_pointer old_vect
       const uint8_t *src = (const uint8_t *)byte_vector_bytes(old_vect);
       uint8_t *dst;
       if (vector_rank(old_vect) > 1)
-	new_vect = g_make_vector_1(sc, set_plist_2(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)), int_zero), sc->make_byte_vector_symbol);
+        new_vect = g_make_vector_1(sc, set_plist_2(sc, g_vector_dimensions(sc, set_plist_1(sc, old_vect)), int_zero), sc->make_byte_vector_symbol);
       else new_vect = make_simple_byte_vector(sc, len);
       dst = (uint8_t *)byte_vector_bytes(new_vect);
       for (s7_int i = len; i > 0; i--) *dst++ = *src++;
@@ -42057,12 +42057,12 @@ static s7_pointer univect_ref(s7_scheme *sc, s7_pointer args, s7_pointer caller,
     {
       index = cadr(args);
       if (!s7_is_integer(index))
-	return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], 2));
+        return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], 2));
       ind = s7_integer_clamped_if_gmp(sc, index);
       if ((ind < 0) || (ind >= vector_length(v)))
-	sole_arg_out_of_range_error_nr(sc, caller, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
+        sole_arg_out_of_range_error_nr(sc, caller, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
       if (!is_null(cddr(args)))
-	out_of_range_error_nr(sc, caller, int_two, cdr(args), too_many_indices_string);
+        out_of_range_error_nr(sc, caller, int_two, cdr(args), too_many_indices_string);
     }
   else
     {
@@ -42070,22 +42070,22 @@ static s7_pointer univect_ref(s7_scheme *sc, s7_pointer args, s7_pointer caller,
       s7_pointer x;
       ind = 0;
       for (x = cdr(args), i = 0; (is_not_null(x)) && (i < vector_ndims(v)); x = cdr(x), i++)
-	{
-	  s7_int n;
-	  index = car(x);
-	  if (!s7_is_integer(index))
-	    return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], i + 2));
-	  n = s7_integer_clamped_if_gmp(sc, index);
-	  if ((n < 0) || (n >= vector_dimension(v, i)))
-	    out_of_range_error_nr(sc, caller, wrap_integer(sc, i + 2), index, (n < 0) ? it_is_negative_string : it_is_too_large_string);
-	  ind += n * vector_offset(v, i);
-	}
+        {
+          s7_int n;
+          index = car(x);
+          if (!s7_is_integer(index))
+            return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], i + 2));
+          n = s7_integer_clamped_if_gmp(sc, index);
+          if ((n < 0) || (n >= vector_dimension(v, i)))
+            out_of_range_error_nr(sc, caller, wrap_integer(sc, i + 2), index, (n < 0) ? it_is_negative_string : it_is_too_large_string);
+          ind += n * vector_offset(v, i);
+        }
       if (is_not_null(x))
-	out_of_range_error_nr(sc, caller, int_two, cdr(args), too_many_indices_string);
+        out_of_range_error_nr(sc, caller, int_two, cdr(args), too_many_indices_string);
 
       /* if not enough indices, return a subvector covering whatever is left */
       if (i < vector_ndims(v))
-	return(subvector(sc, v, i, ind));
+        return(subvector(sc, v, i, ind));
     }
   if (typ == T_FLOAT_VECTOR)
     return(make_real(sc, float_vector(v, ind)));
@@ -42108,58 +42108,58 @@ static s7_pointer univect_set(s7_scheme *sc, s7_pointer args, s7_pointer caller,
       s7_pointer x;
       ind = 0;
       for (x = cdr(args), i = 0; (is_not_null(cdr(x))) && (i < vector_ndims(vec)); x = cdr(x), i++)
-	{
-	  s7_int n;
-	  index = car(x);
-	  if (!s7_is_integer(index))
-	    return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], i + 2));
-	  n = s7_integer_clamped_if_gmp(sc, index);
-	  if ((n < 0) || (n >= vector_dimension(vec, i)))
-	    out_of_range_error_nr(sc, caller, wrap_integer(sc, i + 2), index, (n < 0) ? it_is_negative_string : it_is_too_large_string);
-	  ind += n * vector_offset(vec, i);
-	}
+        {
+          s7_int n;
+          index = car(x);
+          if (!s7_is_integer(index))
+            return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], i + 2));
+          n = s7_integer_clamped_if_gmp(sc, index);
+          if ((n < 0) || (n >= vector_dimension(vec, i)))
+            out_of_range_error_nr(sc, caller, wrap_integer(sc, i + 2), index, (n < 0) ? it_is_negative_string : it_is_too_large_string);
+          ind += n * vector_offset(vec, i);
+        }
       if (is_not_null(cdr(x)))
-	error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, wrap_string(sc, "too many arguments for ~A: ~S", 29), caller, args));
+        error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, wrap_string(sc, "too many arguments for ~A: ~S", 29), caller, args));
       if (i != vector_ndims(vec))
-	error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, wrap_string(sc, "not enough arguments for ~A: ~S", 31), caller, args));
+        error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, wrap_string(sc, "not enough arguments for ~A: ~S", 31), caller, args));
       val = car(x);
     }
   else
     {
       s7_pointer p = cdr(args);
       if (is_null(p))
-	error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, wrap_string(sc, "not enough arguments for ~A: ~S", 31), caller, args));
+        error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, wrap_string(sc, "not enough arguments for ~A: ~S", 31), caller, args));
       /* from (set! (v) val) after optimization into op_set_opsq_a which is completely confused -- set! gets v's setter (float-vector-set!) */
       index = car(p);
       if (!s7_is_integer(index))
-	return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], 2));
+        return(method_or_bust(sc, index, caller, args, sc->type_names[T_INTEGER], 2));
       ind = s7_integer_clamped_if_gmp(sc, index);
       if ((ind < 0) || (ind >= vector_length(vec)))
-	out_of_range_error_nr(sc, caller, int_two, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
+        out_of_range_error_nr(sc, caller, int_two, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
       if (is_not_null(cddr(p)))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_3(sc, wrap_string(sc, "too many arguments for ~A: ~S", 29), caller, args));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_3(sc, wrap_string(sc, "too many arguments for ~A: ~S", 29), caller, args));
       val = cadr(p);
     }
 
   if (typ == T_FLOAT_VECTOR)
     {
       if (!is_real(val))
-	return(method_or_bust(sc, val, caller, args, sc->type_names[T_REAL], 3));
+        return(method_or_bust(sc, val, caller, args, sc->type_names[T_REAL], 3));
       float_vector(vec, ind) = s7_real(val);
     }
   else
     if (typ == T_INT_VECTOR)
       {
-	if (!s7_is_integer(val))
-	  return(method_or_bust(sc, val, caller, args, sc->type_names[T_INTEGER], 3));
-	int_vector(vec, ind) = s7_integer_clamped_if_gmp(sc, val);
+        if (!s7_is_integer(val))
+          return(method_or_bust(sc, val, caller, args, sc->type_names[T_INTEGER], 3));
+        int_vector(vec, ind) = s7_integer_clamped_if_gmp(sc, val);
       }
     else
       {
-	if (!is_byte(val))
-	  return(method_or_bust(sc, val, caller, args, sc->type_names[T_INTEGER], 3));
-	byte_vector(vec, ind) = (uint8_t)s7_integer_clamped_if_gmp(sc, val);
+        if (!is_byte(val))
+          return(method_or_bust(sc, val, caller, args, sc->type_names[T_INTEGER], 3));
+        byte_vector(vec, ind) = (uint8_t)s7_integer_clamped_if_gmp(sc, val);
       }
   return(val);
 }
@@ -42309,19 +42309,19 @@ static bool find_matching_ref(s7_scheme *sc, const s7_pointer getter, s7_pointer
     {
       s7_pointer val = cadddr(expr);
       if (is_optimized(val)) /* includes is_pair */
-	for (s7_pointer p = val; is_pair(p); p = cdr(p))
-	  if (is_pair(car(p)))
-	    {
-	      s7_pointer ref = car(p);
-	      if (((car(ref) == getter) &&             /* (getter v ind) */
-		   (is_proper_list_2(sc, cdr(ref))) &&
-		   (cadr(ref) == v) &&
-		   (caddr(ref) == ind)) ||
-		  ((car(ref) == v) &&                  /* (v ind) */
-		   (is_proper_list_1(sc, cdr(ref))) &&
-		   (cadr(ref) == ind)))
-		return(true);
-	    }}
+        for (s7_pointer p = val; is_pair(p); p = cdr(p))
+          if (is_pair(car(p)))
+            {
+              s7_pointer ref = car(p);
+              if (((car(ref) == getter) &&             /* (getter v ind) */
+                   (is_proper_list_2(sc, cdr(ref))) &&
+                   (cadr(ref) == v) &&
+                   (caddr(ref) == ind)) ||
+                  ((car(ref) == v) &&                  /* (v ind) */
+                   (is_proper_list_1(sc, cdr(ref))) &&
+                   (cadr(ref) == ind)))
+                return(true);
+            }}
   return(false);
 }
 
@@ -42501,28 +42501,28 @@ static s7_pointer int_vector_set_p_ppp(s7_scheme *sc, s7_pointer v, s7_pointer i
     {
       s7_int i = integer(index);
       if ((i < 0) || (i >= vector_length(v)))
-	out_of_range_error_nr(sc, sc->int_vector_set_symbol, int_two, index, (i < 0) ? it_is_negative_string : it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->int_vector_set_symbol, int_two, index, (i < 0) ? it_is_negative_string : it_is_too_large_string);
       int_vector(v, i) = integer(val);
     }
   else
     {
       if (!is_int_vector(v))
-	return(method_or_bust_ppp(sc, v, sc->int_vector_set_symbol, v, index, val, sc->type_names[T_INT_VECTOR], 1));
+        return(method_or_bust_ppp(sc, v, sc->int_vector_set_symbol, v, index, val, sc->type_names[T_INT_VECTOR], 1));
       if (vector_rank(v) != 1)
-	return(univect_set(sc, set_plist_3(sc, v, index, val), sc->int_vector_set_symbol, T_INT_VECTOR));
+        return(univect_set(sc, set_plist_3(sc, v, index, val), sc->int_vector_set_symbol, T_INT_VECTOR));
       if (is_immutable_vector(v))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->int_vector_set_symbol, v));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->int_vector_set_symbol, v));
       /* (int-vector-set!  #i() `(x 1) (abs x)) in a do loop in a function... */
       if (!s7_is_integer(index))
-	return(method_or_bust_ppp(sc, index, sc->int_vector_set_symbol, v, index, val, sc->type_names[T_INTEGER], 2));
+        return(method_or_bust_ppp(sc, index, sc->int_vector_set_symbol, v, index, val, sc->type_names[T_INTEGER], 2));
       if (!s7_is_integer(val))
-	return(method_or_bust_ppp(sc, val, sc->int_vector_set_symbol, v, index, val, sc->type_names[T_INTEGER], 3));
+        return(method_or_bust_ppp(sc, val, sc->int_vector_set_symbol, v, index, val, sc->type_names[T_INTEGER], 3));
 #if WITH_GMP
       {
-	s7_int i = s7_integer_clamped_if_gmp(sc, index);
-	if ((i < 0) || (i >= vector_length(v)))
-	  out_of_range_error_nr(sc, sc->int_vector_set_symbol, int_two, index, (i < 0) ? it_is_negative_string : it_is_too_large_string);
-	int_vector(v, i) = s7_integer_clamped_if_gmp(sc, val);
+        s7_int i = s7_integer_clamped_if_gmp(sc, index);
+        if ((i < 0) || (i >= vector_length(v)))
+          out_of_range_error_nr(sc, sc->int_vector_set_symbol, int_two, index, (i < 0) ? it_is_negative_string : it_is_too_large_string);
+        int_vector(v, i) = s7_integer_clamped_if_gmp(sc, val);
       }
 #else
       if (S7_DEBUGGING) fprintf(stderr, "fell through %s[%d]\n", __func__, __LINE__);
@@ -42840,34 +42840,34 @@ static void local_qsort_r(void *base, size_t nmemb, size_t size, int32_t (*compa
       nmemb /= 4;
       h = nmemb + 1;
       for (t = 1; nmemb != 0; nmemb /= 4)
-	t *= 2;
+        t *= 2;
       do {
-	size_t bytes = h * size;
-	uint8_t *i = (uint8_t *)(array + bytes);
-	uint8_t *k;
-	do {
-	  uint8_t *j = (uint8_t *)(i - bytes);
-	  if (compar(j, i, arg) > 0)
-	    {
-	      k = i;
-	      do {
-		uint8_t *p1 = j, *p2 = k;
-		uint8_t *end = (uint8_t *)(p2 + size);
-		do {
-		  uint8_t swap = *p1;
-		  *p1++ = *p2;
-		  *p2++ = swap;
-		} while (p2 != end);
-		if (bytes + array > j)
-		  break;
-		k = j;
-		j -= bytes;
-	      } while (compar(j, k, arg) > 0);
-	    }
-	  i += size;
-	} while (i != after);
-	t /= 2;
-	h = t * t - t * 3 / 2 + 1;
+        size_t bytes = h * size;
+        uint8_t *i = (uint8_t *)(array + bytes);
+        uint8_t *k;
+        do {
+          uint8_t *j = (uint8_t *)(i - bytes);
+          if (compar(j, i, arg) > 0)
+            {
+              k = i;
+              do {
+                uint8_t *p1 = j, *p2 = k;
+                uint8_t *end = (uint8_t *)(p2 + size);
+                do {
+                  uint8_t swap = *p1;
+                  *p1++ = *p2;
+                  *p2++ = swap;
+                } while (p2 != end);
+                if (bytes + array > j)
+                  break;
+                k = j;
+                j -= bytes;
+              } while (compar(j, k, arg) > 0);
+            }
+          i += size;
+        } while (i != after);
+        t /= 2;
+        h = t * t - t * 3 / 2 + 1;
       } while (t != 0);
     }
 #endif
@@ -43015,9 +43015,9 @@ static s7_pointer g_sort(s7_scheme *sc, s7_pointer args)
       /* (apply sort! () #f) should be an error I think */
       lessp = cadr(args);
       if (type(lessp) < T_CONTINUATION)
-	return(method_or_bust(sc, lessp, sc->sort_symbol, args, a_procedure_string, 2));
+        return(method_or_bust(sc, lessp, sc->sort_symbol, args, a_procedure_string, 2));
       if (!s7_is_aritable(sc, lessp, 2))
-	wrong_type_error_nr(sc, sc->sort_symbol, 2, lessp, an_eq_func_string);
+        wrong_type_error_nr(sc, sc->sort_symbol, 2, lessp, an_eq_func_string);
       return(sc->nil);
     }
 
@@ -43040,159 +43040,159 @@ static s7_pointer g_sort(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer sig = c_function_signature(lessp);
       if ((sig) &&
-	  (is_pair(sig)) &&
-	  (car(sig) != sc->is_boolean_symbol))
-	wrong_type_error_nr(sc, sc->sort_symbol, 2, lessp,
-					     wrap_string(sc, "sort! function should return a boolean", 38));
+          (is_pair(sig)) &&
+          (car(sig) != sc->is_boolean_symbol))
+        wrong_type_error_nr(sc, sc->sort_symbol, 2, lessp,
+                                             wrap_string(sc, "sort! function should return a boolean", 38));
       sc->sort_f = s7_b_7pp_function(lessp);
       if (sc->sort_f) sort_func = (sc->sort_f == lt_b_7pp) ? vector_sort_lt : vector_sort;
     }
   else
     {
       if (is_closure(lessp))
-	{
-	  s7_pointer expr = car(closure_body(lessp));
-	  s7_pointer largs = closure_args(lessp);
-
-	  if ((is_pair(largs)) &&       /* closure args not a symbol, etc */
-	      (!arglist_has_rest(sc, largs)))
-	    {
-	      if ((is_null(cdr(closure_body(lessp)))) &&
-		  (is_optimized(expr)) &&
-		  (is_safe_c_op(optimize_op(expr))) &&
-		  /* since (sort seq (lambda (a b) ...)) can't return a "safe closure" (the hop bit is off in
-		   *   optimize in this case, for some arcane reason), the optimized expression won't be hop_safe,
-		   *   but that is irrelevant at this point -- if c_function_is_ok, we're good to go.
-		   */
-		  ((op_has_hop(expr)) ||
-		   ((is_global(car(expr))) &&            /* (sort! x (lambda (car y) (car x)...))! */
-		    (c_function_is_ok(sc, expr)))))
-		{
-		  int32_t orig_data = optimize_op(expr);
-		  set_optimize_op(expr, optimize_op(expr) | 1);
-		  if ((optimize_op(expr) == HOP_SAFE_C_SS) &&
-		      (car(largs) == cadr(expr)) &&
-		      (cadr(largs) == caddr(expr)))
-		    {
-		      s7_pointer lp = lookup(sc, car(expr));
-		      sc->sort_f = s7_b_7pp_function(lp);
-		      if (sc->sort_f)
-			{
-			  sort_func = (sc->sort_f == lt_b_7pp) ? vector_sort_lt : vector_sort;
-			  lessp = lp;
-			}}
-		  else
-		    if ((optimize_op(expr) == HOP_SAFE_C_opSq_opSq) &&
-			((caadr(expr) == sc->car_symbol) || (caadr(expr) == sc->cdr_symbol)) &&
-			(caadr(expr) == caaddr(expr)) &&
-			(car(largs) == cadadr(expr)) &&
-			(cadr(largs) == cadaddr(expr)))
-		      {
-			s7_pointer lp = lookup(sc, car(expr));
-			sc->sort_f = s7_b_7pp_function(lp);
-			if (sc->sort_f)
-			  {
-			    sort_func = ((caadr(expr) == sc->car_symbol) ? vector_car_sort : vector_cdr_sort);
-			    lessp = lp;
-			  }}
-		  set_optimize_op(expr, orig_data);
-		}
-
-	      if (!sort_func)
-		{
-		  s7_pointer init_val, old_e = sc->curlet;
-		  if (is_float_vector(data))
-		    init_val = real_zero;
-		  else init_val = ((is_int_vector(data)) || (is_byte_vector(data))) ? int_zero : sc->F;
-		  set_curlet(sc, inline_make_let_with_two_slots(sc, closure_let(lessp), car(largs), init_val, cadr(largs), init_val));
-		  sc->sort_body = expr;
-		  sc->sort_v1 = let_slots(sc->curlet);
-		  sc->sort_v2 = next_slot(let_slots(sc->curlet));
-		  if (is_null(cdr(closure_body(lessp))))
-		    {
-		      if (!no_bool_opt(closure_body(lessp)))
-			{
-			  s7_pfunc sf1 = s7_bool_optimize(sc, closure_body(lessp));
-			  if (sf1)
-			    {
-			      if (sc->opts[0]->v[0].fb == p_to_b)
-				sort_func = opt_bool_sort_p;
-			      else
-				{
-				  sc->sort_o = sc->opts[0];
-				  sc->sort_fb = sc->sort_o->v[0].fb;
-				  sort_func = (sc->pc == 1) ? opt_bool_sort_0 : opt_bool_sort;
-				}}
-			  else set_no_bool_opt(closure_body(lessp));
-			}}
-		  else
-		    {
-		      sc->sort_body_len = s7_list_length(sc, closure_body(lessp));
-		      if (sc->sort_body_len < (NUM_VUNIONS - SORT_O1))
-			{
-			  s7_pointer p;
-			  int32_t ctr;
-			  opt_info *top;
-			  sc->pc = 0;
-			  top = alloc_opt_info(sc);
-			  for (ctr = SORT_O1, p = closure_body(lessp); is_pair(cdr(p)); ctr++, p = cdr(p))
-			    {
-			      top->v[ctr].o1 = sc->opts[sc->pc];
-			      if (!cell_optimize(sc, p))
-				break;
-			    }
-			  if (is_null(cdr(p)))
-			    {
-			      int32_t start = sc->pc;
-			      top->v[ctr].o1 = sc->opts[start];
-			      if (bool_optimize_nw(sc, p))
-				sort_func = (sc->sort_body_len == 2) ? opt_begin_bool_sort_b2 : opt_begin_bool_sort_b;
-			      else
-				{
-				  sc->pc = start;
-				  if (cell_optimize(sc, p))
-				    sort_func = opt_begin_bool_sort_p;
-				}}}}
-		  if (!sort_func)
-		    set_curlet(sc, old_e);
-		}
-	      if ((!sort_func) &&
-		  (is_safe_closure(lessp))) /* no embedded sort! or call/cc, etc */
-		{
-		  set_curlet(sc, make_let_with_two_slots(sc, closure_let(lessp), car(largs), sc->F, cadr(largs), sc->F));
-		  sc->sort_body = car(closure_body(lessp));
-		  sc->sort_begin = cdr(closure_body(lessp));
-		  sort_func = (is_null(sc->sort_begin)) ? closure_sort : closure_sort_begin;
-		  sc->sort_op = (is_syntactic_pair(sc->sort_body)) ? (opcode_t)optimize_op(sc->sort_body) : (opcode_t)OP_EVAL;
-		  sc->sort_v1 = let_slots(sc->curlet);
-		  sc->sort_v2 = next_slot(let_slots(sc->curlet));
-		}}}}
+        {
+          s7_pointer expr = car(closure_body(lessp));
+          s7_pointer largs = closure_args(lessp);
+
+          if ((is_pair(largs)) &&       /* closure args not a symbol, etc */
+              (!arglist_has_rest(sc, largs)))
+            {
+              if ((is_null(cdr(closure_body(lessp)))) &&
+                  (is_optimized(expr)) &&
+                  (is_safe_c_op(optimize_op(expr))) &&
+                  /* since (sort seq (lambda (a b) ...)) can't return a "safe closure" (the hop bit is off in
+                   *   optimize in this case, for some arcane reason), the optimized expression won't be hop_safe,
+                   *   but that is irrelevant at this point -- if c_function_is_ok, we're good to go.
+                   */
+                  ((op_has_hop(expr)) ||
+                   ((is_global(car(expr))) &&            /* (sort! x (lambda (car y) (car x)...))! */
+                    (c_function_is_ok(sc, expr)))))
+                {
+                  int32_t orig_data = optimize_op(expr);
+                  set_optimize_op(expr, optimize_op(expr) | 1);
+                  if ((optimize_op(expr) == HOP_SAFE_C_SS) &&
+                      (car(largs) == cadr(expr)) &&
+                      (cadr(largs) == caddr(expr)))
+                    {
+                      s7_pointer lp = lookup(sc, car(expr));
+                      sc->sort_f = s7_b_7pp_function(lp);
+                      if (sc->sort_f)
+                        {
+                          sort_func = (sc->sort_f == lt_b_7pp) ? vector_sort_lt : vector_sort;
+                          lessp = lp;
+                        }}
+                  else
+                    if ((optimize_op(expr) == HOP_SAFE_C_opSq_opSq) &&
+                        ((caadr(expr) == sc->car_symbol) || (caadr(expr) == sc->cdr_symbol)) &&
+                        (caadr(expr) == caaddr(expr)) &&
+                        (car(largs) == cadadr(expr)) &&
+                        (cadr(largs) == cadaddr(expr)))
+                      {
+                        s7_pointer lp = lookup(sc, car(expr));
+                        sc->sort_f = s7_b_7pp_function(lp);
+                        if (sc->sort_f)
+                          {
+                            sort_func = ((caadr(expr) == sc->car_symbol) ? vector_car_sort : vector_cdr_sort);
+                            lessp = lp;
+                          }}
+                  set_optimize_op(expr, orig_data);
+                }
+
+              if (!sort_func)
+                {
+                  s7_pointer init_val, old_e = sc->curlet;
+                  if (is_float_vector(data))
+                    init_val = real_zero;
+                  else init_val = ((is_int_vector(data)) || (is_byte_vector(data))) ? int_zero : sc->F;
+                  set_curlet(sc, inline_make_let_with_two_slots(sc, closure_let(lessp), car(largs), init_val, cadr(largs), init_val));
+                  sc->sort_body = expr;
+                  sc->sort_v1 = let_slots(sc->curlet);
+                  sc->sort_v2 = next_slot(let_slots(sc->curlet));
+                  if (is_null(cdr(closure_body(lessp))))
+                    {
+                      if (!no_bool_opt(closure_body(lessp)))
+                        {
+                          s7_pfunc sf1 = s7_bool_optimize(sc, closure_body(lessp));
+                          if (sf1)
+                            {
+                              if (sc->opts[0]->v[0].fb == p_to_b)
+                                sort_func = opt_bool_sort_p;
+                              else
+                                {
+                                  sc->sort_o = sc->opts[0];
+                                  sc->sort_fb = sc->sort_o->v[0].fb;
+                                  sort_func = (sc->pc == 1) ? opt_bool_sort_0 : opt_bool_sort;
+                                }}
+                          else set_no_bool_opt(closure_body(lessp));
+                        }}
+                  else
+                    {
+                      sc->sort_body_len = s7_list_length(sc, closure_body(lessp));
+                      if (sc->sort_body_len < (NUM_VUNIONS - SORT_O1))
+                        {
+                          s7_pointer p;
+                          int32_t ctr;
+                          opt_info *top;
+                          sc->pc = 0;
+                          top = alloc_opt_info(sc);
+                          for (ctr = SORT_O1, p = closure_body(lessp); is_pair(cdr(p)); ctr++, p = cdr(p))
+                            {
+                              top->v[ctr].o1 = sc->opts[sc->pc];
+                              if (!cell_optimize(sc, p))
+                                break;
+                            }
+                          if (is_null(cdr(p)))
+                            {
+                              int32_t start = sc->pc;
+                              top->v[ctr].o1 = sc->opts[start];
+                              if (bool_optimize_nw(sc, p))
+                                sort_func = (sc->sort_body_len == 2) ? opt_begin_bool_sort_b2 : opt_begin_bool_sort_b;
+                              else
+                                {
+                                  sc->pc = start;
+                                  if (cell_optimize(sc, p))
+                                    sort_func = opt_begin_bool_sort_p;
+                                }}}}
+                  if (!sort_func)
+                    set_curlet(sc, old_e);
+                }
+              if ((!sort_func) &&
+                  (is_safe_closure(lessp))) /* no embedded sort! or call/cc, etc */
+                {
+                  set_curlet(sc, make_let_with_two_slots(sc, closure_let(lessp), car(largs), sc->F, cadr(largs), sc->F));
+                  sc->sort_body = car(closure_body(lessp));
+                  sc->sort_begin = cdr(closure_body(lessp));
+                  sort_func = (is_null(sc->sort_begin)) ? closure_sort : closure_sort_begin;
+                  sc->sort_op = (is_syntactic_pair(sc->sort_body)) ? (opcode_t)optimize_op(sc->sort_body) : (opcode_t)OP_EVAL;
+                  sc->sort_v1 = let_slots(sc->curlet);
+                  sc->sort_v2 = next_slot(let_slots(sc->curlet));
+                }}}}
 
   switch (type(data))
     {
     case T_PAIR:
       len = s7_list_length(sc, data);            /* 0 here == infinite */
       if (len <= 0)
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_2(sc, wrap_string(sc, "sort! first argument should be a proper list: ~S", 48), data));
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_2(sc, wrap_string(sc, "sort! first argument should be a proper list: ~S", 48), data));
       if (len < 2)
-	return(data);
+        return(data);
       if (sort_func)
-	{
-	  s7_int i = 0;
-	  s7_pointer vec = g_vector(sc, data);
-	  gc_protect_2_via_stack(sc, vec, data);
-	  elements = s7_vector_elements(vec);
-	  local_qsort_r((void *)elements, len, sizeof(s7_pointer), sort_func, (void *)sc);
-	  for (s7_pointer p = data; i < len; i++, p = cdr(p))
-	    {
-	      if (is_immutable_pair(p))
-		immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->sort_symbol, data));
-	      set_car(p, elements[i]);
-	    }
-	  unstack_gc_protect(sc); /* not pop_stack! */
-	  return(data);
-	}
+        {
+          s7_int i = 0;
+          s7_pointer vec = g_vector(sc, data);
+          gc_protect_2_via_stack(sc, vec, data);
+          elements = s7_vector_elements(vec);
+          local_qsort_r((void *)elements, len, sizeof(s7_pointer), sort_func, (void *)sc);
+          for (s7_pointer p = data; i < len; i++, p = cdr(p))
+            {
+              if (is_immutable_pair(p))
+                immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->sort_symbol, data));
+              set_car(p, elements[i]);
+            }
+          unstack_gc_protect(sc); /* not pop_stack! */
+          return(data);
+        }
       push_stack(sc, OP_SORT_PAIR_END, cons(sc, data, lessp), sc->code); /* save and gc protect the original list and func */
       set_car(args, g_vector(sc, data));
       break;
@@ -43200,154 +43200,154 @@ static s7_pointer g_sort(s7_scheme *sc, s7_pointer args)
     case T_BYTE_VECTOR:
     case T_STRING:
       {
-	s7_int i;
-	s7_pointer vec;
-	uint8_t *chrs;
-	if (is_string(data))
-	  {
-	    len = string_length(data);
-	    chrs = (uint8_t *)string_value(data);
-	  }
-	else
-	  {
-	    len = byte_vector_length(data);
-	    chrs = byte_vector_bytes(data);
-	  }
-	if (len < 2) return(data);
-	if (is_c_function(lessp))
-	  {
-	    if (((is_string(data)) && (sc->sort_f == char_lt_b_7pp)) ||
-		((is_byte_vector(data)) && (sc->sort_f == lt_b_7pp)))
-	      {
-		qsort((void *)chrs, len, sizeof(uint8_t), byte_less);
-		return(data);
-	      }
-	    if (((is_string(data)) && (sc->sort_f == char_gt_b_7pp)) ||
-		((is_byte_vector(data)) && (sc->sort_f == gt_b_7pp)))
-	      {
-		qsort((void *)chrs, len, sizeof(uint8_t), byte_greater);
-		return(data);
-	      }}
-	vec = make_simple_vector(sc, len);
-	gc_protect_2_via_stack(sc, vec, data);
-	elements = s7_vector_elements(vec);
-	if (is_byte_vector(data))
-	  for (i = 0; i < len; i++) elements[i] = small_int(chrs[i]);
-	else for (i = 0; i < len; i++) elements[i] = chars[chrs[i]];
-	if (sort_func)
-	  {
-	    local_qsort_r((void *)elements, len, sizeof(s7_pointer), sort_func, (void *)sc);
-	    if (is_byte_vector(data))
-	      for (i = 0; i < len; i++)	chrs[i] = (char)integer(elements[i]);
-	    else for (i = 0; i < len; i++) chrs[i] = character(elements[i]);
-	    unstack_gc_protect(sc); /* not pop_stack! */
-	    return(data);
-	  }
-	unstack_gc_protect(sc); /* not pop_stack! */
-	push_stack(sc, OP_SORT_STRING_END, cons_unchecked(sc, data, lessp), sc->code);
-	set_car(args, vec);
+        s7_int i;
+        s7_pointer vec;
+        uint8_t *chrs;
+        if (is_string(data))
+          {
+            len = string_length(data);
+            chrs = (uint8_t *)string_value(data);
+          }
+        else
+          {
+            len = byte_vector_length(data);
+            chrs = byte_vector_bytes(data);
+          }
+        if (len < 2) return(data);
+        if (is_c_function(lessp))
+          {
+            if (((is_string(data)) && (sc->sort_f == char_lt_b_7pp)) ||
+                ((is_byte_vector(data)) && (sc->sort_f == lt_b_7pp)))
+              {
+                qsort((void *)chrs, len, sizeof(uint8_t), byte_less);
+                return(data);
+              }
+            if (((is_string(data)) && (sc->sort_f == char_gt_b_7pp)) ||
+                ((is_byte_vector(data)) && (sc->sort_f == gt_b_7pp)))
+              {
+                qsort((void *)chrs, len, sizeof(uint8_t), byte_greater);
+                return(data);
+              }}
+        vec = make_simple_vector(sc, len);
+        gc_protect_2_via_stack(sc, vec, data);
+        elements = s7_vector_elements(vec);
+        if (is_byte_vector(data))
+          for (i = 0; i < len; i++) elements[i] = small_int(chrs[i]);
+        else for (i = 0; i < len; i++) elements[i] = chars[chrs[i]];
+        if (sort_func)
+          {
+            local_qsort_r((void *)elements, len, sizeof(s7_pointer), sort_func, (void *)sc);
+            if (is_byte_vector(data))
+              for (i = 0; i < len; i++)        chrs[i] = (char)integer(elements[i]);
+            else for (i = 0; i < len; i++) chrs[i] = character(elements[i]);
+            unstack_gc_protect(sc); /* not pop_stack! */
+            return(data);
+          }
+        unstack_gc_protect(sc); /* not pop_stack! */
+        push_stack(sc, OP_SORT_STRING_END, cons_unchecked(sc, data, lessp), sc->code);
+        set_car(args, vec);
       }
       break;
 
     case T_INT_VECTOR:
     case T_FLOAT_VECTOR:
       {
-	s7_int i;
-	s7_pointer vec;
-	len = vector_length(data);
-	if (len < 2)
-	  return(data);
-	if (is_c_function(lessp))
-	  {
-	    if (sc->sort_f == lt_b_7pp)
-	      {
-		if (is_float_vector(data))
-		  qsort((void *)float_vector_floats(data), len, sizeof(s7_double), dbl_less);
-		else qsort((void *)int_vector_ints(data), len, sizeof(s7_int), int_less);
-		return(data);
-	      }
-	    if (sc->sort_f == gt_b_7pp)
-	      {
-		if (is_float_vector(data))
-		  qsort((void *)float_vector_floats(data), len, sizeof(s7_double), dbl_greater);
-		else qsort((void *)int_vector_ints(data), len, sizeof(s7_int), int_greater);
-		return(data);
-	      }}
-	/* currently we have to make the ordinary vector here even if not sf1
-	 *   because the sorter uses vector_element to access sort args (see SORT_DATA in eval).
-	 *   This is probably better than passing down getter/setter (fewer allocations).
-	 *   get/set macro in eval is SORT_DATA(k) then s7_vector_to_list if pair at start (sort_*_end)
-	 */
-	vec = make_vector_1(sc, len, FILLED, T_VECTOR);
-	gc_protect_2_via_stack(sc, vec, data);
-	/* we need this vector prefilled because make_real|integer below can cause a GC at any time during that loop,
-	 *   and the GC mark process expects the vector to have an s7_pointer at every element.
-	 */
-	add_vector(sc, vec);
-	elements = s7_vector_elements(vec);
-	check_free_heap_size(sc, len);
-	if (is_float_vector(data))
-	  for (i = 0; i < len; i++) elements[i] = make_real_unchecked(sc, float_vector(data, i));
-	else for (i = 0; i < len; i++) elements[i] = make_integer_unchecked(sc, int_vector(data, i));
-	if (sort_func)
-	  {
-	    local_qsort_r((void *)elements, len, sizeof(s7_pointer), sort_func, (void *)sc);
-	    if (is_float_vector(data))
-	      for (i = 0; i < len; i++)	float_vector(data, i) = real(elements[i]);
-	    else for (i = 0; i < len; i++) int_vector(data, i) = integer(elements[i]);
-	    unstack_gc_protect(sc);
-	    return(data);
-	  }
-	set_car(args, vec);
-	init_temp(sc->y, cons(sc, data, lessp));
-	unstack_gc_protect(sc);
-	push_stack(sc, OP_SORT_VECTOR_END, sc->y, sc->code); /* save and gc protect the original homogeneous vector and func */
-	sc->y = sc->unused;
+        s7_int i;
+        s7_pointer vec;
+        len = vector_length(data);
+        if (len < 2)
+          return(data);
+        if (is_c_function(lessp))
+          {
+            if (sc->sort_f == lt_b_7pp)
+              {
+                if (is_float_vector(data))
+                  qsort((void *)float_vector_floats(data), len, sizeof(s7_double), dbl_less);
+                else qsort((void *)int_vector_ints(data), len, sizeof(s7_int), int_less);
+                return(data);
+              }
+            if (sc->sort_f == gt_b_7pp)
+              {
+                if (is_float_vector(data))
+                  qsort((void *)float_vector_floats(data), len, sizeof(s7_double), dbl_greater);
+                else qsort((void *)int_vector_ints(data), len, sizeof(s7_int), int_greater);
+                return(data);
+              }}
+        /* currently we have to make the ordinary vector here even if not sf1
+         *   because the sorter uses vector_element to access sort args (see SORT_DATA in eval).
+         *   This is probably better than passing down getter/setter (fewer allocations).
+         *   get/set macro in eval is SORT_DATA(k) then s7_vector_to_list if pair at start (sort_*_end)
+         */
+        vec = make_vector_1(sc, len, FILLED, T_VECTOR);
+        gc_protect_2_via_stack(sc, vec, data);
+        /* we need this vector prefilled because make_real|integer below can cause a GC at any time during that loop,
+         *   and the GC mark process expects the vector to have an s7_pointer at every element.
+         */
+        add_vector(sc, vec);
+        elements = s7_vector_elements(vec);
+        check_free_heap_size(sc, len);
+        if (is_float_vector(data))
+          for (i = 0; i < len; i++) elements[i] = make_real_unchecked(sc, float_vector(data, i));
+        else for (i = 0; i < len; i++) elements[i] = make_integer_unchecked(sc, int_vector(data, i));
+        if (sort_func)
+          {
+            local_qsort_r((void *)elements, len, sizeof(s7_pointer), sort_func, (void *)sc);
+            if (is_float_vector(data))
+              for (i = 0; i < len; i++)        float_vector(data, i) = real(elements[i]);
+            else for (i = 0; i < len; i++) int_vector(data, i) = integer(elements[i]);
+            unstack_gc_protect(sc);
+            return(data);
+          }
+        set_car(args, vec);
+        init_temp(sc->y, cons(sc, data, lessp));
+        unstack_gc_protect(sc);
+        push_stack(sc, OP_SORT_VECTOR_END, sc->y, sc->code); /* save and gc protect the original homogeneous vector and func */
+        sc->y = sc->unused;
       }
       break;
 
     case T_VECTOR:
       len = vector_length(data);
       if (len < 2)
-	return(data);
+        return(data);
       if (sort_func)
-	{
-	  s7_pointer *els = s7_vector_elements(data);
-	  int32_t typ = type(els[0]);
-	  if ((typ == T_INTEGER) || (typ == T_REAL) || (typ == T_STRING) || (typ == T_CHARACTER))
-	    for (s7_int i = 1; i < len; i++)
-	      if (type(els[i]) != typ)
-		{
-		  typ = T_FREE;
-		  break;
-		}
-	  if ((sc->sort_f == lt_b_7pp) || (sc->sort_f == gt_b_7pp))
-	    {
-	      if (typ == T_INTEGER)
-		{
-		  qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == lt_b_7pp) ? int_less_2 : int_greater_2));
-		  return(data);
-		}
-	      if (typ == T_REAL)
-		{
-		  qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == lt_b_7pp) ? dbl_less_2 : dbl_greater_2));
-		  return(data);
-		}}
-	  if ((typ == T_STRING) &&
-	      ((sc->sort_f == string_lt_b_7pp) || (sc->sort_f == string_gt_b_7pp)))
-	    {
-	      qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == string_lt_b_7pp) ? str_less_2 : str_greater_2));
-	      return(data);
-	    }
-	  if ((typ == T_CHARACTER) &&
-	      ((sc->sort_f == char_lt_b_7pp) || (sc->sort_f == char_gt_b_7pp)))
-	    {
-	      qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == char_lt_b_7pp) ? chr_less_2 : chr_greater_2));
-	      return(data);
-	    }
-	  local_qsort_r((void *)s7_vector_elements(data), len, sizeof(s7_pointer), sort_func, (void *)sc);
-	  return(data);
-	}
+        {
+          s7_pointer *els = s7_vector_elements(data);
+          int32_t typ = type(els[0]);
+          if ((typ == T_INTEGER) || (typ == T_REAL) || (typ == T_STRING) || (typ == T_CHARACTER))
+            for (s7_int i = 1; i < len; i++)
+              if (type(els[i]) != typ)
+                {
+                  typ = T_FREE;
+                  break;
+                }
+          if ((sc->sort_f == lt_b_7pp) || (sc->sort_f == gt_b_7pp))
+            {
+              if (typ == T_INTEGER)
+                {
+                  qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == lt_b_7pp) ? int_less_2 : int_greater_2));
+                  return(data);
+                }
+              if (typ == T_REAL)
+                {
+                  qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == lt_b_7pp) ? dbl_less_2 : dbl_greater_2));
+                  return(data);
+                }}
+          if ((typ == T_STRING) &&
+              ((sc->sort_f == string_lt_b_7pp) || (sc->sort_f == string_gt_b_7pp)))
+            {
+              qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == string_lt_b_7pp) ? str_less_2 : str_greater_2));
+              return(data);
+            }
+          if ((typ == T_CHARACTER) &&
+              ((sc->sort_f == char_lt_b_7pp) || (sc->sort_f == char_gt_b_7pp)))
+            {
+              qsort((void *)els, len, sizeof(s7_pointer), ((sc->sort_f == char_lt_b_7pp) ? chr_less_2 : chr_greater_2));
+              return(data);
+            }
+          local_qsort_r((void *)s7_vector_elements(data), len, sizeof(s7_pointer), sort_func, (void *)sc);
+          return(data);
+        }
       break;
 
     default:
@@ -43384,7 +43384,7 @@ static s7_pointer vector_into_list(s7_scheme *sc, s7_pointer vect, s7_pointer ls
   for (s7_pointer p = lst; i < len; i++, p = cdr(p))
     {
       if (is_immutable_pair(p))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->sort_symbol, lst));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->sort_symbol, lst));
       set_car(p, elements[i]);
     }
   return(lst);
@@ -43397,12 +43397,12 @@ static s7_pointer vector_into_fi_vector(s7_pointer source, s7_pointer dest)
   if (is_float_vector(dest))
     {
       s7_double *flts = float_vector_floats(dest);
-      for (s7_int i = 0; i < len; i++)	flts[i] = real(elements[i]);
+      for (s7_int i = 0; i < len; i++)        flts[i] = real(elements[i]);
     }
   else
     {
       s7_int *ints = int_vector_ints(dest);
-      for (s7_int i = 0; i < len; i++)	ints[i] = integer(elements[i]);
+      for (s7_int i = 0; i < len; i++)        ints[i] = integer(elements[i]);
     }
   return(dest);
 }
@@ -43414,12 +43414,12 @@ static s7_pointer vector_into_string(s7_pointer vect, s7_pointer dest)
   if (is_byte_vector(dest))
     {
       uint8_t *str = (uint8_t *)byte_vector_bytes(dest);
-      for (s7_int i = 0; i < len; i++)	str[i] = (uint8_t)integer(elements[i]);
+      for (s7_int i = 0; i < len; i++)        str[i] = (uint8_t)integer(elements[i]);
     }
   else
     {
       uint8_t *str = (uint8_t *)string_value(dest);
-      for (s7_int i = 0; i < len; i++)	str[i] = character(elements[i]);
+      for (s7_int i = 0; i < len; i++)        str[i] = character(elements[i]);
     }
   return(dest);
 }
@@ -43443,7 +43443,7 @@ static s7_pointer op_heapsort(s7_scheme *sc)
     {
       SORT_CALLS++;
       if (SORT_CALLS > SORT_STOP)
-	error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "sort! is caught in an infinite loop, comparison: ~S", 51), SORT_LESSP));
+        error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "sort! is caught in an infinite loop, comparison: ~S", 51), SORT_LESSP));
     }
   j = 2 * k;
   SORT_J = j;
@@ -43452,7 +43452,7 @@ static s7_pointer op_heapsort(s7_scheme *sc)
       s7_pointer lx = SORT_LESSP; /* cadr of sc->args */
       push_stack_direct(sc, OP_SORT1);
       if (needs_copied_args(lx))
-	sc->args = list_2(sc, SORT_DATA(j), SORT_DATA(j + 1));
+        sc->args = list_2(sc, SORT_DATA(j), SORT_DATA(j + 1));
       else sc->args = with_list_t2(SORT_DATA(j), SORT_DATA(j + 1));
       sc->code = lx;
       sc->value = sc->T; /* for eval */
@@ -43536,18 +43536,18 @@ static void free_hash_table(s7_scheme *sc, s7_pointer table)
       hash_entry_t **entries = hash_table_elements(table);
       s7_int len = hash_table_size(table);
       for (s7_int i = 0; i < len; i++)
-	{
-	  hash_entry_t *n;
-	  for (hash_entry_t *p = entries[i++]; p; p = n)
-	    {
-	      n = hash_entry_next(p);
-	      liberate_block(sc, p);
-	    }
-	  for (hash_entry_t *p = entries[i]; p; p = n)
-	    {
-	      n = hash_entry_next(p);
-	      liberate_block(sc, p);
-	    }}}
+        {
+          hash_entry_t *n;
+          for (hash_entry_t *p = entries[i++]; p; p = n)
+            {
+              n = hash_entry_next(p);
+              liberate_block(sc, p);
+            }
+          for (hash_entry_t *p = entries[i]; p; p = n)
+            {
+              n = hash_entry_next(p);
+              liberate_block(sc, p);
+            }}}
   liberate(sc, hash_table_block(table));
 }
 
@@ -43640,36 +43640,36 @@ static void check_hash_table_typer(s7_scheme *sc, s7_pointer caller, s7_pointer
     {
       s7_pointer sig = c_function_signature(typer);
       if ((sig != sc->pl_bt) &&
-	  (is_pair(sig)) &&
-	  ((car(sig) != sc->is_boolean_symbol) || (cadr(sig) != sc->T) || (!is_null(cddr(sig)))))
-	wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a boolean procedure", 19));
+          (is_pair(sig)) &&
+          ((car(sig) != sc->is_boolean_symbol) || (cadr(sig) != sc->T) || (!is_null(cddr(sig)))))
+        wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a boolean procedure", 19));
       if (!c_function_name(typer))
-	wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a named function", 16));
+        wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a named function", 16));
     }
   else
     {
       if (!is_any_closure(typer))
-	wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a built-in procedure, a closure or #t", 37));
+        wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a built-in procedure, a closure or #t", 37));
       if (!is_symbol(find_closure(sc, typer, closure_let(typer))))
-	wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a named function", 16));
+        wrong_type_error_nr(sc, caller, 2, typer, wrap_string(sc, "a named function", 16));
     }
   if (!s7_is_aritable(sc, typer, 1))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~A: the second argument, ~S, (the type checker) should accept one argument", 74), caller, typer));
+             set_elist_3(sc, wrap_string(sc, "~A: the second argument, ~S, (the type checker) should accept one argument", 74), caller, typer));
   if (is_c_function(typer))
     {
       if (!c_function_symbol(typer))
-	c_function_symbol(typer) = make_symbol(sc, c_function_name(typer), c_function_name_length(typer));
+        c_function_symbol(typer) = make_symbol(sc, c_function_name(typer), c_function_name_length(typer));
       if (c_function_has_simple_elements(typer))
-	{
-	  if (caller == sc->hash_table_value_typer_symbol)
-	    set_has_simple_values(h);
-	  else
-	    {
-	      set_has_simple_keys(h);
-	      if (symbol_type(c_function_symbol(typer)) != T_FREE)
-		set_has_hash_key_type(h);
-	    }}}
+        {
+          if (caller == sc->hash_table_value_typer_symbol)
+            set_has_simple_values(h);
+          else
+            {
+              set_has_simple_keys(h);
+              if (symbol_type(c_function_symbol(typer)) != T_FREE)
+                set_has_hash_key_type(h);
+            }}}
   if (is_null(hash_table_procedures(h)))
     hash_table_set_procedures(h, make_hash_table_procedures(sc));
   set_is_typed_hash_table(h);
@@ -43687,11 +43687,11 @@ static s7_pointer g_set_hash_table_key_typer(s7_scheme *sc, s7_pointer args)
   if (is_boolean(typer)) /* remove current typer, if any */
     {
       if (is_typed_hash_table(h))
-	{
-	  hash_table_set_key_typer(h, sc->T);
-	  clear_has_simple_keys(h);
-	  if (hash_table_value_typer(h) == sc->T) clear_is_typed_hash_table(h);
-	}}
+        {
+          hash_table_set_key_typer(h, sc->T);
+          clear_has_simple_keys(h);
+          if (hash_table_value_typer(h) == sc->T) clear_is_typed_hash_table(h);
+        }}
   else
     {
       check_hash_table_typer(sc, sc->hash_table_key_typer_symbol, h, typer);
@@ -43712,11 +43712,11 @@ static s7_pointer g_set_hash_table_value_typer(s7_scheme *sc, s7_pointer args)
   if (is_boolean(typer)) /* remove current typer, if any */
     {
       if (is_typed_hash_table(h))
-	{
-	  hash_table_set_value_typer(h, sc->T);
-	  clear_has_simple_values(h);
-	  if (hash_table_key_typer(h) == sc->T) clear_is_typed_hash_table(h);
-	}}
+        {
+          hash_table_set_value_typer(h, sc->T);
+          clear_has_simple_values(h);
+          if (hash_table_key_typer(h) == sc->T) clear_is_typed_hash_table(h);
+        }}
   else
     {
       check_hash_table_typer(sc, sc->hash_table_value_typer_symbol, h, typer);
@@ -43767,7 +43767,7 @@ static s7_pointer g_hash_code(s7_scheme *sc, s7_pointer args)
   if ((is_pair(cdr(args))) &&
       (!is_procedure(cadr(args))))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "hash-code second argument (currently ignored) should be a function: ~S", 70), cadr(args)));
+             set_elist_2(sc, wrap_string(sc, "hash-code second argument (currently ignored) should be a function: ~S", 70), cadr(args)));
   return(make_integer(sc, default_hash_map[type(obj)](sc, sc->dummy_equal_hash_table, obj)));
 }
 
@@ -43790,7 +43790,7 @@ static hash_entry_t *hash_equal_syntax(s7_scheme *sc, s7_pointer table, s7_point
   s7_int loc = hash_loc(sc, table, key) & hash_table_mask(table);
   for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     if ((is_syntax(hash_entry_key(x))) &&
-	(syntax_symbol(hash_entry_key(x)) == syntax_symbol(key))) /* the opcodes might differ, but the symbols should not */
+        (syntax_symbol(hash_entry_key(x)) == syntax_symbol(key))) /* the opcodes might differ, but the symbols should not */
       return(x);
   return(sc->unentry);
 }
@@ -43888,8 +43888,8 @@ static hash_entry_t *find_number_in_bin(s7_scheme *sc, hash_entry_t *bin, s7_poi
   for (; bin; bin = hash_entry_next(bin))
     if (equiv(sc, key, hash_entry_key(bin), NULL))
       {
-	sc->equivalent_float_epsilon = old_eps;
-	return(bin);
+        sc->equivalent_float_epsilon = old_eps;
+        return(bin);
       }
   sc->equivalent_float_epsilon = old_eps;
   return(NULL);
@@ -43977,18 +43977,18 @@ static hash_entry_t *hash_int(s7_scheme *sc, s7_pointer table, s7_pointer key)
       s7_int loc = s7_int_abs(kv) & hash_mask;
       for (x = hash_table_element(table, loc); x; x = hash_entry_next(x))
 #if WITH_GMP
-	if (is_t_integer(hash_entry_key(x)))
-	  {
-	    if (integer(hash_entry_key(x)) == kv)
-	      return(x);
-	  }
-	else
-	  if ((is_t_big_integer(hash_entry_key(x))) &&
-	      (mpz_get_si(big_integer(hash_entry_key(x))) == kv))
-	    return(x);
+        if (is_t_integer(hash_entry_key(x)))
+          {
+            if (integer(hash_entry_key(x)) == kv)
+              return(x);
+          }
+        else
+          if ((is_t_big_integer(hash_entry_key(x))) &&
+              (mpz_get_si(big_integer(hash_entry_key(x))) == kv))
+            return(x);
 #else
       if (integer(hash_entry_key(x)) == kv)
-	return(x);
+        return(x);
 #endif
     }
   return(sc->unentry);
@@ -44007,15 +44007,15 @@ static hash_entry_t *hash_float(s7_scheme *sc, s7_pointer table, s7_pointer key)
       s7_int loc, hash_mask;
 #if WITH_GMP
       if (is_t_real(key))
-	{
-	  keyval = real(key);
-	  if (is_NaN(keyval)) return(sc->unentry);
-	}
+        {
+          keyval = real(key);
+          if (is_NaN(keyval)) return(sc->unentry);
+        }
       else
-	{
-	  if (mpfr_nan_p(big_real(key))) return(sc->unentry);
-	  keyval = mpfr_get_d(big_real(key), MPFR_RNDN);
-	}
+        {
+          if (mpfr_nan_p(big_real(key))) return(sc->unentry);
+          keyval = mpfr_get_d(big_real(key), MPFR_RNDN);
+        }
 #else
       keyval = real(key);
       if (is_NaN(keyval)) return(sc->unentry);
@@ -44024,17 +44024,17 @@ static hash_entry_t *hash_float(s7_scheme *sc, s7_pointer table, s7_pointer key)
       loc = hash_float_location(keyval) & hash_mask;
 
       for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	{
-	  if ((is_t_real(hash_entry_key(x))) &&
-	      (keyval == real(hash_entry_key(x))))
-	    return(x);
+        {
+          if ((is_t_real(hash_entry_key(x))) &&
+              (keyval == real(hash_entry_key(x))))
+            return(x);
 #if WITH_GMP
-	  if ((is_t_big_real(hash_entry_key(x))) &&
-	      (mpfr_cmp_d(big_real(hash_entry_key(x)), keyval) == 0) &&
-	      (!mpfr_nan_p(big_real(hash_entry_key(x)))))
-	    return(x);
+          if ((is_t_big_real(hash_entry_key(x))) &&
+              (mpfr_cmp_d(big_real(hash_entry_key(x)), keyval) == 0) &&
+              (!mpfr_nan_p(big_real(hash_entry_key(x)))))
+            return(x);
 #endif
-	}}
+        }}
   return(sc->unentry);
 }
 
@@ -44078,16 +44078,16 @@ static hash_entry_t *hash_number_num_eq(s7_scheme *sc, s7_pointer table, s7_poin
       s7_int hash_mask = hash_table_mask(table);
       hash_map_t map = hash_table_mapper(table)[type(key)];
       if (hash_table_checker(table) == hash_int)    /* surely by far the most common case? only ints */
-	{
-	  s7_int keyi = integer(key);
-	  s7_int loc = map(sc, table, key) & hash_mask;
-	  for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	    if (keyi == integer(hash_entry_key(x))) /* not in gmp, hash_int as eq_func, what else can key be but t_integer? */
-	      return(x);
-	}
+        {
+          s7_int keyi = integer(key);
+          s7_int loc = map(sc, table, key) & hash_mask;
+          for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
+            if (keyi == integer(hash_entry_key(x))) /* not in gmp, hash_int as eq_func, what else can key be but t_integer? */
+              return(x);
+        }
       else
 #endif
-	return((is_real(key)) ? hash_real_num_eq(sc, table, key) : hash_complex_num_eq(sc, table, key));
+        return((is_real(key)) ? hash_real_num_eq(sc, table, key) : hash_complex_num_eq(sc, table, key));
     }
   return(sc->unentry);
 }
@@ -44105,8 +44105,8 @@ static hash_entry_t *hash_char(s7_scheme *sc, s7_pointer table, s7_pointer key)
        */
       s7_int loc = character(key) & hash_table_mask(table);
       for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	if (key == hash_entry_key(x))
-	  return(x);
+        if (key == hash_entry_key(x))
+          return(x);
     }
   return(sc->unentry);
 }
@@ -44121,8 +44121,8 @@ static hash_entry_t *hash_ci_char(s7_scheme *sc, s7_pointer table, s7_pointer ke
       s7_int hash_mask = hash_table_mask(table);
       s7_int loc = hash_loc(sc, table, key) & hash_mask;
       for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	if (upper_character(key) == upper_character(hash_entry_key(x)))
-	  return(x);
+        if (upper_character(key) == upper_character(hash_entry_key(x)))
+          return(x);
     }
   return(sc->unentry);
 }
@@ -44148,22 +44148,22 @@ static hash_entry_t *hash_string(s7_scheme *sc, s7_pointer table, s7_pointer key
       const char *key_str = string_value(key);
 
       if (string_hash(key) == 0)
-	string_hash(key) = raw_string_hash((const uint8_t *)string_value(key), string_length(key));
+        string_hash(key) = raw_string_hash((const uint8_t *)string_value(key), string_length(key));
       hash = string_hash(key); /* keep uint64_t (not s7_int from hash_map_string) */
 
       if (key_len <= 8)
-	{
-	  for (x = hash_table_element(table, hash & hash_mask); x; x = hash_entry_next(x))
-	    if ((hash == string_hash(hash_entry_key(x))) &&
-		(key_len == string_length(hash_entry_key(x))))
-	      return(x);
-	}
+        {
+          for (x = hash_table_element(table, hash & hash_mask); x; x = hash_entry_next(x))
+            if ((hash == string_hash(hash_entry_key(x))) &&
+                (key_len == string_length(hash_entry_key(x))))
+              return(x);
+        }
       else
-	for (x = hash_table_element(table, hash & hash_mask); x; x = hash_entry_next(x))
-	  if ((hash == string_hash(hash_entry_key(x))) &&
-	      (key_len == string_length(hash_entry_key(x))) &&        /* these are scheme strings, so we can't assume 0=end of string */
-	      (strings_are_equal_with_length(key_str, string_value(hash_entry_key(x)), key_len)))
-	    return(x);
+        for (x = hash_table_element(table, hash & hash_mask); x; x = hash_entry_next(x))
+          if ((hash == string_hash(hash_entry_key(x))) &&
+              (key_len == string_length(hash_entry_key(x))) &&        /* these are scheme strings, so we can't assume 0=end of string */
+              (strings_are_equal_with_length(key_str, string_value(hash_entry_key(x)), key_len)))
+            return(x);
     }
   return(sc->unentry);
 }
@@ -44182,8 +44182,8 @@ static hash_entry_t *hash_ci_string(s7_scheme *sc, s7_pointer table, s7_pointer
       s7_int hash_mask = hash_table_mask(table);
       s7_int hash = hash_map_ci_string(sc, table, key);
       for (hash_entry_t *x = hash_table_element(table, hash & hash_mask); x; x = hash_entry_next(x))
-	if (scheme_strequal_ci(key, hash_entry_key(x)))
-	  return(x);
+        if (scheme_strequal_ci(key, hash_entry_key(x)))
+          return(x);
     }
   return(sc->unentry);
 }
@@ -44216,20 +44216,20 @@ static hash_entry_t *hash_eqv(s7_scheme *sc, s7_pointer table, s7_pointer key)
     {
 #if WITH_GMP
       for (x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	if (numbers_are_eqv(sc, key, hash_entry_key(x)))
-	  return(x);
+        if (numbers_are_eqv(sc, key, hash_entry_key(x)))
+          return(x);
 #else
       uint8_t key_type = type(key);
       for (x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	if ((key_type == type(hash_entry_key(x))) &&
-	    (numbers_are_eqv(sc, key, hash_entry_key(x))))
-	  return(x);
+        if ((key_type == type(hash_entry_key(x))) &&
+            (numbers_are_eqv(sc, key, hash_entry_key(x))))
+          return(x);
 #endif
     }
   else
     for (x = hash_table_element(table, loc); x; x = hash_entry_next(x))
       if (s7_is_eqv(sc, key, hash_entry_key(x)))
-	return(x);
+        return(x);
   return(sc->unentry);
 }
 
@@ -44252,19 +44252,19 @@ static s7_int hash_map_hash_table(s7_scheme *sc, s7_pointer table, s7_pointer ke
   for (s7_int i = 0; i < size; i++)
     for (hash_entry_t *x = els[i]; x; x = hash_entry_next(x))
       {
-	if (len == 1)
-	  return(((is_sequence_or_iterator(hash_entry_key(x))) ? 0 : hash_loc(sc, key, hash_entry_key(x))) +
-		 ((is_sequence_or_iterator(hash_entry_value(x))) ? 0 : hash_loc(sc, key, hash_entry_value(x))));
-	if (!key1)
-	  {
-	    key1 = hash_entry_key(x);
-	    val1 = hash_entry_value(x);
-	  }
-	else
-	  return(((is_sequence_or_iterator(key1)) ? 0 : hash_loc(sc, key, key1)) +
-		 ((is_sequence_or_iterator(val1)) ? 0 : hash_loc(sc, key, val1)) +
-		 ((is_sequence_or_iterator(hash_entry_key(x))) ? 0 : hash_loc(sc, key, hash_entry_key(x))) +
-		 ((is_sequence_or_iterator(hash_entry_value(x))) ? 0 : hash_loc(sc, key, hash_entry_value(x))));
+        if (len == 1)
+          return(((is_sequence_or_iterator(hash_entry_key(x))) ? 0 : hash_loc(sc, key, hash_entry_key(x))) +
+                 ((is_sequence_or_iterator(hash_entry_value(x))) ? 0 : hash_loc(sc, key, hash_entry_value(x))));
+        if (!key1)
+          {
+            key1 = hash_entry_key(x);
+            val1 = hash_entry_value(x);
+          }
+        else
+          return(((is_sequence_or_iterator(key1)) ? 0 : hash_loc(sc, key, key1)) +
+                 ((is_sequence_or_iterator(val1)) ? 0 : hash_loc(sc, key, val1)) +
+                 ((is_sequence_or_iterator(hash_entry_key(x))) ? 0 : hash_loc(sc, key, hash_entry_key(x))) +
+                 ((is_sequence_or_iterator(hash_entry_value(x))) ? 0 : hash_loc(sc, key, hash_entry_value(x))));
       }}
   return(0); /* placate the compiler */
 }
@@ -44313,7 +44313,7 @@ static s7_int hash_map_closure(s7_scheme *sc, s7_pointer table, s7_pointer key)
   s7_pointer f = hash_table_procedures_mapper(table);
   if (f == sc->unused)
     error_nr(sc, make_symbol(sc, "hash-map-recursion", 18),
-	     set_elist_1(sc, wrap_string(sc, "hash-table map function called recursively", 42)));
+             set_elist_1(sc, wrap_string(sc, "hash-table map function called recursively", 42)));
   /* check_stack_size(sc); -- perhaps clear typers as well here or save/restore hash-table-procedures */
   gc_protect_via_stack(sc, f);
   hash_table_set_procedures_mapper(table, sc->F);
@@ -44322,7 +44322,7 @@ static s7_int hash_map_closure(s7_scheme *sc, s7_pointer table, s7_pointer key)
   hash_table_set_procedures_mapper(table, f);
   if (!s7_is_integer(sc->value))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "hash-table map function should return an integer: ~S", 52), sc->value));
+             set_elist_2(sc, wrap_string(sc, "hash-table map function should return an integer: ~S", 52), sc->value));
   return(integer(sc->value));
 }
 
@@ -44337,9 +44337,9 @@ static s7_int hash_map_let(s7_scheme *sc, s7_pointer table, s7_pointer key)
   for (slot = let_slots(key), slots = 0; tis_slot(slot); slot = next_slot(slot))
     if (!is_matched_symbol(slot_symbol(slot)))
       {
-	if (!slot1) slot1 = slot; else slot2 = slot;
-	set_match_symbol(slot_symbol(slot));
-	slots++;
+        if (!slot1) slot1 = slot; else slot2 = slot;
+        set_match_symbol(slot_symbol(slot));
+        slots++;
       }
   for (slot = let_slots(key); tis_slot(slot); slot = next_slot(slot))
     clear_match_symbol(slot_symbol(slot));
@@ -44349,7 +44349,7 @@ static s7_int hash_map_let(s7_scheme *sc, s7_pointer table, s7_pointer key)
 
   if (slots == 2)
     return(pointer_map(slot_symbol(slot1)) + ((is_sequence_or_iterator(slot_value(slot1))) ? 0 : hash_loc(sc, table, slot_value(slot1))) +
-	   pointer_map(slot_symbol(slot2)) + ((is_sequence_or_iterator(slot_value(slot2))) ? 0 : hash_loc(sc, table, slot_value(slot2))));
+           pointer_map(slot_symbol(slot2)) + ((is_sequence_or_iterator(slot_value(slot2))) ? 0 : hash_loc(sc, table, slot_value(slot2))));
   return(slots);
 }
 
@@ -44369,12 +44369,12 @@ static hash_entry_t *hash_equal_integer(s7_scheme *sc, s7_pointer table, s7_poin
   for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     {
       if ((is_t_integer(hash_entry_key(x))) &&
-	  (keyint == integer(hash_entry_key(x))))
-	return(x);
+          (keyint == integer(hash_entry_key(x))))
+        return(x);
 #if WITH_GMP
       if ((is_t_big_integer(hash_entry_key(x))) &&
-	  (mpz_cmp_si(big_integer(hash_entry_key(x)), keyint) == 0))
-	return(x);
+          (mpz_cmp_si(big_integer(hash_entry_key(x)), keyint) == 0))
+        return(x);
 #endif
     }
   return(sc->unentry);
@@ -44387,14 +44387,14 @@ static hash_entry_t *hash_equal_ratio(s7_scheme *sc, s7_pointer table, s7_pointe
   for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     {
       if ((is_t_ratio(hash_entry_key(x))) &&
-	  (keynum == numerator(hash_entry_key(x))) &&
-	  (keyden == denominator(hash_entry_key(x))))
-	return(x);
+          (keynum == numerator(hash_entry_key(x))) &&
+          (keyden == denominator(hash_entry_key(x))))
+        return(x);
 #if WITH_GMP
       if ((is_t_big_ratio(hash_entry_key(x))) &&
-	  (keynum == mpz_get_si(mpq_numref(big_ratio(hash_entry_key(x))))) &&
-	  (keyden == mpz_get_si(mpq_denref(big_ratio(hash_entry_key(x))))))
-	return(x);
+          (keynum == mpz_get_si(mpq_numref(big_ratio(hash_entry_key(x))))) &&
+          (keyden == mpz_get_si(mpq_denref(big_ratio(hash_entry_key(x))))))
+        return(x);
 #endif
     }
   return(sc->unentry);
@@ -44409,13 +44409,13 @@ static hash_entry_t *hash_equal_real(s7_scheme *sc, s7_pointer table, s7_pointer
   for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     {
       if ((is_t_real(hash_entry_key(x))) &&
-	  (keydbl == real(hash_entry_key(x))))
-	return(x);
+          (keydbl == real(hash_entry_key(x))))
+        return(x);
 #if WITH_GMP
       if ((is_t_big_real(hash_entry_key(x))) &&
-	  (mpfr_cmp_d(big_real(hash_entry_key(x)), keydbl) == 0) &&
-	  (!mpfr_nan_p(big_real(hash_entry_key(x)))))
-	return(x);
+          (mpfr_cmp_d(big_real(hash_entry_key(x)), keydbl) == 0) &&
+          (!mpfr_nan_p(big_real(hash_entry_key(x)))))
+        return(x);
 #endif
     }
   return(sc->unentry);
@@ -44434,16 +44434,16 @@ static hash_entry_t *hash_equal_complex(s7_scheme *sc, s7_pointer table, s7_poin
   for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     {
       if ((is_t_complex(hash_entry_key(x))) &&
-	  (keyrl == real_part(hash_entry_key(x))) &&
-	  (keyim == imag_part(hash_entry_key(x))))
-	return(x);
+          (keyrl == real_part(hash_entry_key(x))) &&
+          (keyim == imag_part(hash_entry_key(x))))
+        return(x);
 #if WITH_GMP
       if ((is_t_big_complex(hash_entry_key(x))) &&
-	  (mpfr_cmp_d(mpc_realref(big_complex(hash_entry_key(x))), keyrl) == 0) &&
-	  (mpfr_cmp_d(mpc_imagref(big_complex(hash_entry_key(x))), keyim) == 0) &&
-	  (!mpfr_nan_p(mpc_realref(big_complex(hash_entry_key(x))))) &&
-	  (!mpfr_nan_p(mpc_imagref(big_complex(hash_entry_key(x))))))
-	return(x);
+          (mpfr_cmp_d(mpc_realref(big_complex(hash_entry_key(x))), keyrl) == 0) &&
+          (mpfr_cmp_d(mpc_imagref(big_complex(hash_entry_key(x))), keyim) == 0) &&
+          (!mpfr_nan_p(mpc_realref(big_complex(hash_entry_key(x))))) &&
+          (!mpfr_nan_p(mpc_imagref(big_complex(hash_entry_key(x))))))
+        return(x);
 #endif
     }
   return(sc->unentry);
@@ -44459,7 +44459,7 @@ static hash_entry_t *hash_equal_any(s7_scheme *sc, s7_pointer table, s7_pointer
       return(x);
   for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     if ((hash_entry_raw_hash(x) == hash) &&
-	(equal(sc, key, hash_entry_key(x), NULL)))
+        (equal(sc, key, hash_entry_key(x), NULL)))
       return(x);
   return(sc->unentry);
 }
@@ -44501,12 +44501,12 @@ static hash_entry_t *hash_c_function(s7_scheme *sc, s7_pointer table, s7_pointer
       s7_int loc = hash & hash_mask;
       set_car(sc->t2_1, key);
       for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	if (hash_entry_raw_hash(x) == hash)
-	  {
-	    set_car(sc->t2_2, hash_entry_key(x));
-	    if (is_true(sc, f(sc, sc->t2_1)))
-	      return(x);
-	  }
+        if (hash_entry_raw_hash(x) == hash)
+          {
+            set_car(sc->t2_2, hash_entry_key(x));
+            if (is_true(sc, f(sc, sc->t2_1)))
+              return(x);
+          }
       return(sc->unentry);
     }
   return(hash_equal(sc, table, key));
@@ -44533,16 +44533,16 @@ static s7_int hash_map_pair(s7_scheme *sc, s7_pointer table, s7_pointer key)
     loc = hash_loc(sc, table, car(key)) + 1;
   else
     if ((is_pair(car(key))) &&
-	(!is_sequence_or_iterator(caar(key))))
+        (!is_sequence_or_iterator(caar(key))))
       loc = hash_loc(sc, table, caar(key)) + 1;
   if (is_pair(p1))
     {
       if (!is_sequence_or_iterator(car(p1)))
-	loc += hash_loc(sc, table, car(p1)) + 1;
+        loc += hash_loc(sc, table, car(p1)) + 1;
       else
-	if ((is_pair(car(p1))) &&
-	    (!is_sequence_or_iterator(caar(p1))))
-	  loc += hash_loc(sc, table, caar(p1)) + 1;
+        if ((is_pair(car(p1))) &&
+            (!is_sequence_or_iterator(caar(p1))))
+          loc += hash_loc(sc, table, caar(p1)) + 1;
     }
   else
     if (!is_sequence_or_iterator(p1)) /* include () */
@@ -44559,9 +44559,9 @@ static hash_entry_t *hash_closure(s7_scheme *sc, s7_pointer table, s7_pointer ke
       s7_int hash = hash_loc(sc, table, key);
       s7_int loc = hash & hash_mask;
       for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
-	if ((hash_entry_raw_hash(x) == hash) &&
-	    (is_true(sc, s7_call(sc, f, set_plist_2(sc, key, hash_entry_key(x))))))
-	  return(x);
+        if ((hash_entry_raw_hash(x) == hash) &&
+            (is_true(sc, s7_call(sc, f, set_plist_2(sc, key, hash_entry_key(x))))))
+          return(x);
       return(sc->unentry);
     }
   return(hash_equal(sc, table, key));
@@ -44582,15 +44582,15 @@ static hash_entry_t *hash_equivalent(s7_scheme *sc, s7_pointer table, s7_pointer
     {
 #if WITH_GMP
       if (!is_nan_b_7p(sc, key))
-	return(hash_number_equivalent(sc, table, key));
+        return(hash_number_equivalent(sc, table, key));
 #else
       x = hash_number_equivalent(sc, table, key);
       if ((x != sc->unentry) || (!is_nan_b_7p(sc, key)))
-	return(x);
+        return(x);
 #endif
       for (x = hash_table_element(table, 0); x; x = hash_entry_next(x)) /* NaN is mapped to 0 */
-	if (is_nan_b_7p(sc, hash_entry_key(x)))  /* all NaN's are the same to equivalent? */
-	  return(x);
+        if (is_nan_b_7p(sc, hash_entry_key(x)))  /* all NaN's are the same to equivalent? */
+          return(x);
       return(sc->unentry);
     }
   hash = hash_loc(sc, table, key);
@@ -44601,7 +44601,7 @@ static hash_entry_t *hash_equivalent(s7_scheme *sc, s7_pointer table, s7_pointer
 
   for (x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     if ((hash_entry_raw_hash(x) == hash) &&
-	(s7_is_equivalent(sc, hash_entry_key(x), key)))
+        (s7_is_equivalent(sc, hash_entry_key(x), key)))
       return(x);
   return(sc->unentry);
 }
@@ -44609,11 +44609,11 @@ static hash_entry_t *hash_equivalent(s7_scheme *sc, s7_pointer table, s7_pointer
 static bool hash_keys_not_cyclic(s7_scheme *sc, s7_pointer hash)
 {
   return((is_null(hash_table_procedures(hash))) &&
-	 (hash_table_mapper(hash) == default_hash_map) &&
-	 (hash_table_checker(hash) != hash_equal) &&
-	 (hash_table_checker(hash) != hash_equivalent) &&
-	 (hash_table_checker(hash) != hash_closure) &&
-	 (hash_table_checker(hash) != hash_c_function));
+         (hash_table_mapper(hash) == default_hash_map) &&
+         (hash_table_checker(hash) != hash_equal) &&
+         (hash_table_checker(hash) != hash_equivalent) &&
+         (hash_table_checker(hash) != hash_closure) &&
+         (hash_table_checker(hash) != hash_c_function));
 }
 
 
@@ -44629,17 +44629,17 @@ s7_pointer s7_make_hash_table(s7_scheme *sc, s7_int size)
   else
     if ((size & (size - 1)) != 0)          /* already 2^n ? */
       {
-	if ((size & (size + 1)) != 0)      /* already 2^n - 1 ? */
-	  {
-	    size--;
-	    size |= (size >> 1);
-	    size |= (size >> 2);
-	    size |= (size >> 4);
-	    size |= (size >> 8);
-	    size |= (size >> 16);
-	    size |= (size >> 32);
-	  }
-	size++;
+        if ((size & (size + 1)) != 0)      /* already 2^n - 1 ? */
+          {
+            size--;
+            size |= (size >> 1);
+            size |= (size >> 2);
+            size |= (size >> 4);
+            size |= (size >> 8);
+            size |= (size >> 16);
+            size |= (size >> 32);
+          }
+        size++;
       }
   els = (block_t *)callocate(sc, size * sizeof(hash_entry_t *));
   new_cell(sc, table, T_HASH_TABLE | T_SAFE_PROCEDURE);
@@ -44660,9 +44660,9 @@ static bool compatible_types(s7_scheme *sc, const s7_pointer eq_type, const s7_p
   if (eq_type == value_type) return(true);
   if (eq_type == sc->is_number_symbol)              /* only = among built-ins, so other cases aren't needed */
     return((value_type == sc->is_integer_symbol) ||
-	   (value_type == sc->is_real_symbol) ||
-	   (value_type == sc->is_complex_symbol) ||
-	   (value_type == sc->is_rational_symbol));
+           (value_type == sc->is_real_symbol) ||
+           (value_type == sc->is_complex_symbol) ||
+           (value_type == sc->is_rational_symbol));
   return(false);
 }
 
@@ -44675,242 +44675,242 @@ static s7_pointer g_make_hash_table_1(s7_scheme *sc, s7_pointer args, s7_pointer
 used to check equality of keys; it usually defaults to equal?. typer sets the types of the keys and values that are allowed \
 in the table; it is a cons, defaulting to (cons #t #t) which means any types are allowed.\n"
   #define Q_make_hash_table s7_make_signature(sc, 4, sc->is_hash_table_symbol, sc->is_integer_symbol, \
-					      s7_make_signature(sc, 3, sc->is_procedure_symbol, sc->is_pair_symbol, sc->not_symbol), \
-					      s7_make_signature(sc, 2, sc->is_pair_symbol, sc->not_symbol))
+                                              s7_make_signature(sc, 3, sc->is_procedure_symbol, sc->is_pair_symbol, sc->not_symbol), \
+                                              s7_make_signature(sc, 2, sc->is_pair_symbol, sc->not_symbol))
   s7_int size = sc->default_hash_table_length;
 
   if (is_not_null(args))
     {
       s7_pointer p = car(args);
       if (!s7_is_integer(p))
-	return(method_or_bust(sc, p, caller, args, sc->type_names[T_INTEGER], 1));
+        return(method_or_bust(sc, p, caller, args, sc->type_names[T_INTEGER], 1));
       size = s7_integer_clamped_if_gmp(sc, p);
       if (size <= 0)                      /* we need s7_int here to catch (make-hash-table most-negative-fixnum) etc */
-	out_of_range_error_nr(sc, caller, int_one, p, wrap_string(sc, "it should be a positive integer", 31));
+        out_of_range_error_nr(sc, caller, int_one, p, wrap_string(sc, "it should be a positive integer", 31));
       if ((size > sc->max_vector_length) ||
-	  (size >= (1LL << 32LL)))
-	out_of_range_error_nr(sc, caller, int_one, p, it_is_too_large_string);
+          (size >= (1LL << 32LL)))
+        out_of_range_error_nr(sc, caller, int_one, p, it_is_too_large_string);
 
       if (is_not_null(cdr(args)))
-	{
-	  s7_pointer proc;
-	  s7_pointer ht = s7_make_hash_table(sc, size);
-	  /* check for typers */
-	  if (is_pair(cddr(args)))
-	    {
-	      s7_pointer typers = caddr(args);
-	      if (is_pair(typers))
-		{
-		  s7_pointer keyp = car(typers), valp = cdr(typers);
-		  if ((keyp != sc->T) || (valp != sc->T)) /* one of them is a type checker */
-		    {
-		      if (((keyp != sc->T) && (!is_c_function(keyp)) && (!is_any_closure(keyp))) ||
-			  ((valp != sc->T) && (!is_c_function(valp)) && (!is_any_closure(valp))))
-			wrong_type_error_nr(sc, caller, 3, typers, wrap_string(sc, "(key-type . value-type)", 23));
-
-		      if ((keyp != sc->T) &&
-			  (!s7_is_aritable(sc, keyp, 1)))
-			error_nr(sc, sc->wrong_type_arg_symbol,
-				 set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) both functions should take one argument", 100),
-					     caller, typers));
-		      hash_table_set_procedures(ht, make_hash_table_procedures(sc));
-		      hash_table_set_key_typer(ht, keyp);
-		      hash_table_set_value_typer(ht, valp);
-		      if (is_c_function(keyp))
-			{
-			  if (!c_function_name(keyp))
-			    error_nr(sc, sc->wrong_type_arg_symbol,
-				     set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the first function is anonymous", 92),
-						 caller, typers));
-			  if (c_function_has_simple_elements(keyp))
-			    set_has_simple_keys(ht);
-			  if (!c_function_symbol(keyp))
-			    c_function_symbol(keyp) = make_symbol(sc, c_function_name(keyp), c_function_name_length(keyp));
-			  if (symbol_type(c_function_symbol(keyp)) != T_FREE)
-			    set_has_hash_key_type(ht);
-			  /* c_function_marker is not currently used in this context */
-
-			  /* now a consistency check for eq-func and key type */
-			  proc = cadr(args);
-			  if (is_c_function(proc))
-			    {
-			      s7_pointer eq_sig = c_function_signature(proc);
-			      if ((eq_sig) &&
-				  (is_pair(eq_sig)) &&
-				  (is_pair(cdr(eq_sig))) &&
-				  (!compatible_types(sc, cadr(eq_sig), c_function_symbol(keyp))))
-			    error_nr(sc, sc->wrong_type_arg_symbol,
-				     set_elist_3(sc, wrap_string(sc, "~A: in the third argument, the key type function is not compatible with the equality function: ~S", 97),
-						 caller, typers));
-			    }}
-		      else
-			if ((is_any_closure(keyp)) &&
-			    (!is_symbol(find_closure(sc, keyp, closure_let(keyp)))))
-			  error_nr(sc, sc->wrong_type_arg_symbol,
-				   set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the first function is anonymous", 92),
-					       caller, typers));
-		      if ((valp != sc->T) &&
-			  (!s7_is_aritable(sc, valp, 1)))
-			error_nr(sc, sc->wrong_type_arg_symbol,
-				 set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) both functions should take one argument", 100),
-						caller, typers));
-		      if (is_c_function(valp))
-			{
-			  if (!c_function_name(valp))
-			    error_nr(sc, sc->wrong_type_arg_symbol,
-				     set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the second function is anonymous", 93),
-						 caller, typers));
-			  if (c_function_has_simple_elements(valp))
-			    set_has_simple_values(ht);
-			  if (!c_function_symbol(valp))
-			    c_function_symbol(valp) = make_symbol(sc, c_function_name(valp), c_function_name_length(valp));
-			  if (symbol_type(c_function_symbol(valp)) != T_FREE)
-			    set_has_hash_value_type(ht);
-			}
-		      else
-			if ((is_any_closure(valp)) &&
-			    (!is_symbol(find_closure(sc, valp, closure_let(valp)))))
-			  error_nr(sc, sc->wrong_type_arg_symbol,
-				   set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the second function is anonymous", 93),
-					       caller, typers));
-		      set_is_typed_hash_table(ht);
-		    }}
-	      else
-		if (typers != sc->F)
-		  wrong_type_error_nr(sc, caller, 3, typers, wrap_string(sc, "either #f or (cons key-type-check value-type-check)", 51));
-	    }
-
-	  /* check eq_func */
-	  proc = cadr(args);
-
-	  if (is_c_function(proc))
-	    {
-	      hash_set_chosen(ht);
-
-	      if (!s7_is_aritable(sc, proc, 2))
-		wrong_type_error_nr(sc, caller, 2, proc, an_eq_func_string);
-
-	      if (c_function_call(proc) == g_is_equal)
-		{
-		  hash_table_checker(ht) = hash_equal;
-		  return(ht);
-		}
-	      if (c_function_call(proc) == g_is_equivalent)
-		{
-		  hash_table_checker(ht) = hash_equivalent;
-		  hash_table_mapper(ht) = equivalent_hash_map; /* needed only by hash_table_equal_1 (checker_locked looks at mapper?!) */
-		  return(ht);
-		}
-	      if (c_function_call(proc) == g_is_eq)
-		{
-		  hash_table_checker(ht) = hash_eq;
-		  hash_table_mapper(ht) = eq_hash_map;
-		  return(ht);
-		}
-	      if (c_function_call(proc) == g_strings_are_equal)
-		{
-		  hash_table_checker(ht) = hash_string;
-		  hash_table_mapper(ht) = string_eq_hash_map;
-		  return(ht);
-		}
+        {
+          s7_pointer proc;
+          s7_pointer ht = s7_make_hash_table(sc, size);
+          /* check for typers */
+          if (is_pair(cddr(args)))
+            {
+              s7_pointer typers = caddr(args);
+              if (is_pair(typers))
+                {
+                  s7_pointer keyp = car(typers), valp = cdr(typers);
+                  if ((keyp != sc->T) || (valp != sc->T)) /* one of them is a type checker */
+                    {
+                      if (((keyp != sc->T) && (!is_c_function(keyp)) && (!is_any_closure(keyp))) ||
+                          ((valp != sc->T) && (!is_c_function(valp)) && (!is_any_closure(valp))))
+                        wrong_type_error_nr(sc, caller, 3, typers, wrap_string(sc, "(key-type . value-type)", 23));
+
+                      if ((keyp != sc->T) &&
+                          (!s7_is_aritable(sc, keyp, 1)))
+                        error_nr(sc, sc->wrong_type_arg_symbol,
+                                 set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) both functions should take one argument", 100),
+                                             caller, typers));
+                      hash_table_set_procedures(ht, make_hash_table_procedures(sc));
+                      hash_table_set_key_typer(ht, keyp);
+                      hash_table_set_value_typer(ht, valp);
+                      if (is_c_function(keyp))
+                        {
+                          if (!c_function_name(keyp))
+                            error_nr(sc, sc->wrong_type_arg_symbol,
+                                     set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the first function is anonymous", 92),
+                                                 caller, typers));
+                          if (c_function_has_simple_elements(keyp))
+                            set_has_simple_keys(ht);
+                          if (!c_function_symbol(keyp))
+                            c_function_symbol(keyp) = make_symbol(sc, c_function_name(keyp), c_function_name_length(keyp));
+                          if (symbol_type(c_function_symbol(keyp)) != T_FREE)
+                            set_has_hash_key_type(ht);
+                          /* c_function_marker is not currently used in this context */
+
+                          /* now a consistency check for eq-func and key type */
+                          proc = cadr(args);
+                          if (is_c_function(proc))
+                            {
+                              s7_pointer eq_sig = c_function_signature(proc);
+                              if ((eq_sig) &&
+                                  (is_pair(eq_sig)) &&
+                                  (is_pair(cdr(eq_sig))) &&
+                                  (!compatible_types(sc, cadr(eq_sig), c_function_symbol(keyp))))
+                            error_nr(sc, sc->wrong_type_arg_symbol,
+                                     set_elist_3(sc, wrap_string(sc, "~A: in the third argument, the key type function is not compatible with the equality function: ~S", 97),
+                                                 caller, typers));
+                            }}
+                      else
+                        if ((is_any_closure(keyp)) &&
+                            (!is_symbol(find_closure(sc, keyp, closure_let(keyp)))))
+                          error_nr(sc, sc->wrong_type_arg_symbol,
+                                   set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the first function is anonymous", 92),
+                                               caller, typers));
+                      if ((valp != sc->T) &&
+                          (!s7_is_aritable(sc, valp, 1)))
+                        error_nr(sc, sc->wrong_type_arg_symbol,
+                                 set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) both functions should take one argument", 100),
+                                                caller, typers));
+                      if (is_c_function(valp))
+                        {
+                          if (!c_function_name(valp))
+                            error_nr(sc, sc->wrong_type_arg_symbol,
+                                     set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the second function is anonymous", 93),
+                                                 caller, typers));
+                          if (c_function_has_simple_elements(valp))
+                            set_has_simple_values(ht);
+                          if (!c_function_symbol(valp))
+                            c_function_symbol(valp) = make_symbol(sc, c_function_name(valp), c_function_name_length(valp));
+                          if (symbol_type(c_function_symbol(valp)) != T_FREE)
+                            set_has_hash_value_type(ht);
+                        }
+                      else
+                        if ((is_any_closure(valp)) &&
+                            (!is_symbol(find_closure(sc, valp, closure_let(valp)))))
+                          error_nr(sc, sc->wrong_type_arg_symbol,
+                                   set_elist_3(sc, wrap_string(sc, "~A: in the third argument, ~S, (the key/value type checkers) the second function is anonymous", 93),
+                                               caller, typers));
+                      set_is_typed_hash_table(ht);
+                    }}
+              else
+                if (typers != sc->F)
+                  wrong_type_error_nr(sc, caller, 3, typers, wrap_string(sc, "either #f or (cons key-type-check value-type-check)", 51));
+            }
+
+          /* check eq_func */
+          proc = cadr(args);
+
+          if (is_c_function(proc))
+            {
+              hash_set_chosen(ht);
+
+              if (!s7_is_aritable(sc, proc, 2))
+                wrong_type_error_nr(sc, caller, 2, proc, an_eq_func_string);
+
+              if (c_function_call(proc) == g_is_equal)
+                {
+                  hash_table_checker(ht) = hash_equal;
+                  return(ht);
+                }
+              if (c_function_call(proc) == g_is_equivalent)
+                {
+                  hash_table_checker(ht) = hash_equivalent;
+                  hash_table_mapper(ht) = equivalent_hash_map; /* needed only by hash_table_equal_1 (checker_locked looks at mapper?!) */
+                  return(ht);
+                }
+              if (c_function_call(proc) == g_is_eq)
+                {
+                  hash_table_checker(ht) = hash_eq;
+                  hash_table_mapper(ht) = eq_hash_map;
+                  return(ht);
+                }
+              if (c_function_call(proc) == g_strings_are_equal)
+                {
+                  hash_table_checker(ht) = hash_string;
+                  hash_table_mapper(ht) = string_eq_hash_map;
+                  return(ht);
+                }
 #if (!WITH_PURE_S7)
-	      if (c_function_call(proc) == g_strings_are_ci_equal)
-		{
-		  hash_table_checker(ht) = hash_ci_string;
-		  hash_table_mapper(ht) = string_ci_eq_hash_map;
-		  return(ht);
-		}
-	      if (c_function_call(proc) == g_chars_are_ci_equal)
-		{
-		  hash_table_checker(ht) = hash_ci_char;
-		  hash_table_mapper(ht) = char_ci_eq_hash_map;
-		  return(ht);
-		}
-#endif
-	      if (c_function_call(proc) == g_chars_are_equal)
-		{
-		  hash_table_checker(ht) = hash_char;
-		  hash_table_mapper(ht) = char_eq_hash_map;
-		  return(ht);
-		}
-	      if (c_function_call(proc) == g_num_eq)
-		{
-		  if ((is_typed_hash_table(ht)) &&
-		      (hash_table_key_typer(ht) == global_value(sc->is_integer_symbol)))
-		    hash_table_checker(ht) = hash_int;
-		  else hash_table_checker(ht) = hash_number_num_eq;
-		  return(ht);
-		}
-	      if (c_function_call(proc) == g_is_eqv)
-		{
-		  hash_table_checker(ht) = hash_eqv;
-		  return(ht);
-		}
-	      error_nr(sc, sc->out_of_range_symbol,
-		       set_elist_3(sc, wrap_string(sc, "~A second argument, ~S, is not a built-in function it can handle", 64), caller, proc));
-	    }
-	  /* proc not c_function */
-	  else
-	    {
-	      if (is_pair(proc))
-		{
-		  s7_pointer checker = car(proc), mapper = cdr(proc);
-
-		  hash_set_chosen(ht);
-		  if (!((is_any_c_function(checker)) ||
-			(is_any_closure(checker))))
-		    error_nr(sc, sc->wrong_type_arg_symbol,
-			     set_elist_4(sc, wrap_string(sc, "~A: first entry of type info, ~A, is ~A, but should be a function", 65),
-					 caller, checker, type_name_string(sc, checker)));
-		  if (!((is_any_c_function(mapper)) ||
-			(is_any_closure(mapper))))
-		    error_nr(sc, sc->wrong_type_arg_symbol,
-			     set_elist_4(sc, wrap_string(sc, "~A: second entry of type info, ~A, is ~A, but should be a function", 66),
-					 caller, mapper, type_name_string(sc, mapper)));
-
-		  if (!(s7_is_aritable(sc, checker, 2)))
-		    error_nr(sc, sc->wrong_type_arg_symbol,
-			     set_elist_3(sc, wrap_string(sc, "~A's equality function, ~A, (car of the second argument) should be a function of two arguments", 94),
-					 caller, checker));
-		  if (!(s7_is_aritable(sc, mapper, 1)))
-		    error_nr(sc, sc->wrong_type_arg_symbol,
-			     set_elist_3(sc, wrap_string(sc, "~A's mapping function, ~A, (cdr of the second argument) should be a function of one argument", 92),
-					 caller, mapper));
-
-		  if (is_any_c_function(checker))
-		    {
-		      s7_pointer sig = c_function_signature(checker);
-		      if ((sig) &&
-			  (is_pair(sig)) &&
-			  (car(sig) != sc->is_boolean_symbol))
-			error_nr(sc, sc->wrong_type_arg_symbol,
-				 set_elist_3(sc, wrap_string(sc, "~A checker function, ~S, should return a boolean value", 54), caller, checker));
-		      hash_table_checker(ht) = hash_c_function;
-		    }
-		  else hash_table_checker(ht) = hash_closure;
-
-		  if (is_any_c_function(mapper))
-		    {
-		      s7_pointer sig = c_function_signature(mapper);
-		      if ((sig) &&
-			  (is_pair(sig)) &&
-			  (car(sig) != sc->is_integer_symbol))
-			error_nr(sc, sc->wrong_type_arg_symbol,
-				 set_elist_3(sc, wrap_string(sc, "~A mapper function, ~S, should return an integer", 48), caller, mapper));
-		      hash_table_mapper(ht) = c_function_hash_map;
-		    }
-		  else hash_table_mapper(ht) = closure_hash_map;
-
-		  if (is_null(hash_table_procedures(ht)))
-		    hash_table_set_procedures(ht, make_hash_table_procedures(sc));
-		  hash_table_set_procedures_checker(ht, car(proc)); /* proc = cadr(args) */
-		  hash_table_set_procedures_mapper(ht, cdr(proc));
-		  return(ht);
-		}
-	      if (proc != sc->F)
-		  wrong_type_error_nr(sc, caller, 2, proc, wrap_string(sc, "either #f or (cons equality-func map-func)", 42));
-	      return(ht);
-	    }}}
+              if (c_function_call(proc) == g_strings_are_ci_equal)
+                {
+                  hash_table_checker(ht) = hash_ci_string;
+                  hash_table_mapper(ht) = string_ci_eq_hash_map;
+                  return(ht);
+                }
+              if (c_function_call(proc) == g_chars_are_ci_equal)
+                {
+                  hash_table_checker(ht) = hash_ci_char;
+                  hash_table_mapper(ht) = char_ci_eq_hash_map;
+                  return(ht);
+                }
+#endif
+              if (c_function_call(proc) == g_chars_are_equal)
+                {
+                  hash_table_checker(ht) = hash_char;
+                  hash_table_mapper(ht) = char_eq_hash_map;
+                  return(ht);
+                }
+              if (c_function_call(proc) == g_num_eq)
+                {
+                  if ((is_typed_hash_table(ht)) &&
+                      (hash_table_key_typer(ht) == global_value(sc->is_integer_symbol)))
+                    hash_table_checker(ht) = hash_int;
+                  else hash_table_checker(ht) = hash_number_num_eq;
+                  return(ht);
+                }
+              if (c_function_call(proc) == g_is_eqv)
+                {
+                  hash_table_checker(ht) = hash_eqv;
+                  return(ht);
+                }
+              error_nr(sc, sc->out_of_range_symbol,
+                       set_elist_3(sc, wrap_string(sc, "~A second argument, ~S, is not a built-in function it can handle", 64), caller, proc));
+            }
+          /* proc not c_function */
+          else
+            {
+              if (is_pair(proc))
+                {
+                  s7_pointer checker = car(proc), mapper = cdr(proc);
+
+                  hash_set_chosen(ht);
+                  if (!((is_any_c_function(checker)) ||
+                        (is_any_closure(checker))))
+                    error_nr(sc, sc->wrong_type_arg_symbol,
+                             set_elist_4(sc, wrap_string(sc, "~A: first entry of type info, ~A, is ~A, but should be a function", 65),
+                                         caller, checker, type_name_string(sc, checker)));
+                  if (!((is_any_c_function(mapper)) ||
+                        (is_any_closure(mapper))))
+                    error_nr(sc, sc->wrong_type_arg_symbol,
+                             set_elist_4(sc, wrap_string(sc, "~A: second entry of type info, ~A, is ~A, but should be a function", 66),
+                                         caller, mapper, type_name_string(sc, mapper)));
+
+                  if (!(s7_is_aritable(sc, checker, 2)))
+                    error_nr(sc, sc->wrong_type_arg_symbol,
+                             set_elist_3(sc, wrap_string(sc, "~A's equality function, ~A, (car of the second argument) should be a function of two arguments", 94),
+                                         caller, checker));
+                  if (!(s7_is_aritable(sc, mapper, 1)))
+                    error_nr(sc, sc->wrong_type_arg_symbol,
+                             set_elist_3(sc, wrap_string(sc, "~A's mapping function, ~A, (cdr of the second argument) should be a function of one argument", 92),
+                                         caller, mapper));
+
+                  if (is_any_c_function(checker))
+                    {
+                      s7_pointer sig = c_function_signature(checker);
+                      if ((sig) &&
+                          (is_pair(sig)) &&
+                          (car(sig) != sc->is_boolean_symbol))
+                        error_nr(sc, sc->wrong_type_arg_symbol,
+                                 set_elist_3(sc, wrap_string(sc, "~A checker function, ~S, should return a boolean value", 54), caller, checker));
+                      hash_table_checker(ht) = hash_c_function;
+                    }
+                  else hash_table_checker(ht) = hash_closure;
+
+                  if (is_any_c_function(mapper))
+                    {
+                      s7_pointer sig = c_function_signature(mapper);
+                      if ((sig) &&
+                          (is_pair(sig)) &&
+                          (car(sig) != sc->is_integer_symbol))
+                        error_nr(sc, sc->wrong_type_arg_symbol,
+                                 set_elist_3(sc, wrap_string(sc, "~A mapper function, ~S, should return an integer", 48), caller, mapper));
+                      hash_table_mapper(ht) = c_function_hash_map;
+                    }
+                  else hash_table_mapper(ht) = closure_hash_map;
+
+                  if (is_null(hash_table_procedures(ht)))
+                    hash_table_set_procedures(ht, make_hash_table_procedures(sc));
+                  hash_table_set_procedures_checker(ht, car(proc)); /* proc = cadr(args) */
+                  hash_table_set_procedures_mapper(ht, cdr(proc));
+                  return(ht);
+                }
+              if (proc != sc->F)
+                  wrong_type_error_nr(sc, caller, 2, proc, wrap_string(sc, "either #f or (cons equality-func map-func)", 42));
+              return(ht);
+            }}}
   return(s7_make_hash_table(sc, size));
 }
 
@@ -44925,8 +44925,8 @@ static s7_pointer g_make_weak_hash_table(s7_scheme *sc, s7_pointer args)
 {
   #define H_make_weak_hash_table "(make-weak-hash-table (size 8) eq-func typers) returns a new weak hash table"
   #define Q_make_weak_hash_table s7_make_signature(sc, 4, sc->is_weak_hash_table_symbol, sc->is_integer_symbol, \
-						   s7_make_signature(sc, 3, sc->is_procedure_symbol, sc->is_pair_symbol, sc->not_symbol), \
-						   s7_make_signature(sc, 2, sc->is_pair_symbol, sc->not_symbol))
+                                                   s7_make_signature(sc, 3, sc->is_procedure_symbol, sc->is_pair_symbol, sc->not_symbol), \
+                                                   s7_make_signature(sc, 2, sc->is_pair_symbol, sc->not_symbol))
   s7_pointer table = g_make_hash_table_1(sc, args, sc->make_weak_hash_table_symbol);
   set_weak_hash_table(table);
   weak_hash_iters(table) = 0;
@@ -45053,12 +45053,12 @@ static void resize_hash_table(s7_scheme *sc, s7_pointer table)
     {
       hash_entry_t *n;
       for (hash_entry_t *x = old_els[i]; x; x = n)
-	{
-	  s7_int loc = hash_entry_raw_hash(x) & hash_mask;
-	  n = hash_entry_next(x);
-	  hash_entry_next(x) = new_els[loc];
-	  new_els[loc] = x;
-	}}
+        {
+          s7_int loc = hash_entry_raw_hash(x) & hash_mask;
+          n = hash_entry_next(x);
+          hash_entry_next(x) = new_els[loc];
+          new_els[loc] = x;
+        }}
   liberate(sc, hash_table_block(table));
   hash_table_set_block(table, np);
   hash_table_elements(table) = new_els;
@@ -45144,7 +45144,7 @@ static s7_pointer hash_table_ref_chooser(s7_scheme *sc, s7_pointer f, int32_t ar
     {
       s7_pointer key = caddr(expr);
       if ((is_pair(key)) && (car(key) == sc->substring_symbol) && (is_global(sc->substring_symbol)))
-	set_c_function(key, sc->substring_uncopied);
+        set_c_function(key, sc->substring_uncopied);
       return(sc->hash_table_ref_2);
     }
  return(f);
@@ -45167,11 +45167,11 @@ static s7_pointer remove_from_hash_table(s7_scheme *sc, s7_pointer table, hash_e
     {
       hash_entry_t *y;
       for (y = x, x = hash_entry_next(x); x; y = x, x = hash_entry_next(x))
-	if (x == p)
-	  {
-	    hash_entry_next(y) = hash_entry_next(x);
-	    break;
-	  }}
+        if (x == p)
+          {
+            hash_entry_next(y) = hash_entry_next(x);
+            break;
+          }}
   hash_table_entries(table)--;
   if ((hash_table_entries(table) == 0) &&
       (hash_table_mapper(table) == default_hash_map))
@@ -45191,29 +45191,29 @@ static void cull_weak_hash_table(s7_scheme *sc, s7_pointer table)
     {
       hash_entry_t *nxp, *lxp = entries[i];
       for (hash_entry_t *xp = entries[i]; xp; xp = nxp)
-	{
-	  nxp = hash_entry_next(xp);
-	  if (is_free_and_clear(hash_entry_key(xp)))
-	    {
-	      if (xp == entries[i])
-		{
-		  entries[i] = nxp;
-		  lxp = nxp;
-		}
-	      else hash_entry_next(lxp) = nxp;
-	      liberate_block(sc, xp);
-	      hash_table_entries(table)--;
-	      if (hash_table_entries(table) == 0)
-		{
-		  if (hash_table_mapper(table) == default_hash_map)
-		    {
-		      hash_table_checker(table) = hash_empty;
-		      hash_clear_chosen(table);
-		    }
-		  return;
-		}}
-	  else lxp = xp;
-	}}
+        {
+          nxp = hash_entry_next(xp);
+          if (is_free_and_clear(hash_entry_key(xp)))
+            {
+              if (xp == entries[i])
+                {
+                  entries[i] = nxp;
+                  lxp = nxp;
+                }
+              else hash_entry_next(lxp) = nxp;
+              liberate_block(sc, xp);
+              hash_table_entries(table)--;
+              if (hash_table_entries(table) == 0)
+                {
+                  if (hash_table_mapper(table) == default_hash_map)
+                    {
+                      hash_table_checker(table) = hash_empty;
+                      hash_clear_chosen(table);
+                    }
+                  return;
+                }}
+          else lxp = xp;
+        }}
 }
 
 static void hash_table_set_default_checker(s7_pointer table, uint8_t typ)
@@ -45221,12 +45221,12 @@ static void hash_table_set_default_checker(s7_pointer table, uint8_t typ)
   if (hash_table_checker(table) != default_hash_checks[typ])
     {
       if (hash_table_checker(table) == hash_empty)
-	hash_table_checker(table) = default_hash_checks[typ];
+        hash_table_checker(table) = default_hash_checks[typ];
       else
-	{
-	  hash_table_checker(table) = hash_equal;
-	  hash_set_chosen(table);
-	}}
+        {
+          hash_table_checker(table) = hash_equal;
+          hash_set_chosen(table);
+        }}
 }
 
 static s7_pointer hash_table_typer_symbol(s7_scheme *sc, s7_pointer typer)
@@ -45242,50 +45242,50 @@ static void check_hash_types(s7_scheme *sc, s7_pointer table, s7_pointer key, s7
     {
       s7_pointer typer = hash_table_key_typer(table);
       if ((is_c_function(typer)) && ((uint8_t)symbol_type(c_function_symbol(typer)) != type(key)))
-	{
-	  const char *tstr = make_type_name(sc, hash_table_typer_name(sc, hash_table_key_typer(table)), INDEFINITE_ARTICLE);
-	  wrong_type_error_nr(sc, wrap_string(sc, "hash-table-set! key", 19), 2, key, wrap_string(sc, tstr, safe_strlen(tstr)));
-	}}
+        {
+          const char *tstr = make_type_name(sc, hash_table_typer_name(sc, hash_table_key_typer(table)), INDEFINITE_ARTICLE);
+          wrong_type_error_nr(sc, wrap_string(sc, "hash-table-set! key", 19), 2, key, wrap_string(sc, tstr, safe_strlen(tstr)));
+        }}
   else
     {
       s7_pointer kf = hash_table_key_typer(table);
       if (kf != sc->T)
-	{
-	  s7_pointer type_ok;
-	  if (is_c_function(kf))
-	    type_ok = c_function_call(kf)(sc, set_plist_1(sc, key));
-	  else type_ok = s7_apply_function(sc, kf, set_plist_1(sc, key));
-	  if (type_ok == sc->F)
-	    {
-	      const char *descr = hash_table_typer_name(sc, hash_table_key_typer(table));
-	      error_nr(sc, sc->wrong_type_arg_symbol,
-		       set_elist_4(sc, wrap_string(sc, "hash-table-set! second argument ~$, is ~A, but the hash-table's key type checker, ~A, rejects it", 96),
-				   key, type_name_string(sc, key), wrap_string(sc, descr, safe_strlen(descr))));
-	    }}}
+        {
+          s7_pointer type_ok;
+          if (is_c_function(kf))
+            type_ok = c_function_call(kf)(sc, set_plist_1(sc, key));
+          else type_ok = s7_apply_function(sc, kf, set_plist_1(sc, key));
+          if (type_ok == sc->F)
+            {
+              const char *descr = hash_table_typer_name(sc, hash_table_key_typer(table));
+              error_nr(sc, sc->wrong_type_arg_symbol,
+                       set_elist_4(sc, wrap_string(sc, "hash-table-set! second argument ~$, is ~A, but the hash-table's key type checker, ~A, rejects it", 96),
+                                   key, type_name_string(sc, key), wrap_string(sc, descr, safe_strlen(descr))));
+            }}}
   if (has_hash_value_type(table))
     {
       s7_pointer typer = hash_table_value_typer(table);
       if ((is_c_function(typer)) && ((uint8_t)symbol_type(c_function_symbol(typer)) != type(value)))
-	{
-	  const char *tstr = make_type_name(sc, hash_table_typer_name(sc, hash_table_value_typer(table)), INDEFINITE_ARTICLE);
-	  wrong_type_error_nr(sc, sc->hash_table_set_symbol, 3, value, wrap_string(sc, tstr, safe_strlen(tstr)));
-	}}
+        {
+          const char *tstr = make_type_name(sc, hash_table_typer_name(sc, hash_table_value_typer(table)), INDEFINITE_ARTICLE);
+          wrong_type_error_nr(sc, sc->hash_table_set_symbol, 3, value, wrap_string(sc, tstr, safe_strlen(tstr)));
+        }}
   else
     {
       s7_pointer vf = hash_table_value_typer(table);
       if (vf != sc->T)
-	{
-	  s7_pointer type_ok;
-	  if (is_c_function(vf))
-	    type_ok = c_function_call(vf)(sc, set_plist_1(sc, value));
-	  else type_ok = s7_apply_function(sc, vf, set_plist_1(sc, value));
-	  if (type_ok == sc->F)
-	    {
-	      const char *descr = hash_table_typer_name(sc, hash_table_value_typer(table));
-	      error_nr(sc, sc->wrong_type_arg_symbol,
-		       set_elist_4(sc, wrap_string(sc, "hash-table-set! third argument ~$, is ~A, but the hash-table's value type checker, ~A, rejects it", 97),
-				   value, type_name_string(sc, value), wrap_string(sc, descr, safe_strlen(descr))));
-	    }}}
+        {
+          s7_pointer type_ok;
+          if (is_c_function(vf))
+            type_ok = c_function_call(vf)(sc, set_plist_1(sc, value));
+          else type_ok = s7_apply_function(sc, vf, set_plist_1(sc, value));
+          if (type_ok == sc->F)
+            {
+              const char *descr = hash_table_typer_name(sc, hash_table_value_typer(table));
+              error_nr(sc, sc->wrong_type_arg_symbol,
+                       set_elist_4(sc, wrap_string(sc, "hash-table-set! third argument ~$, is ~A, but the hash-table's value type checker, ~A, rejects it", 97),
+                                   value, type_name_string(sc, value), wrap_string(sc, descr, safe_strlen(descr))));
+            }}}
 }
 
 static void check_hash_table_checker(s7_scheme *sc, s7_pointer table, s7_pointer key)
@@ -45294,37 +45294,37 @@ static void check_hash_table_checker(s7_scheme *sc, s7_pointer table, s7_pointer
   if (hash_table_checker(table) == hash_number_num_eq)
     {
       if (!is_number(key))
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_3(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is =", 69),
-			     key, type_name_string(sc, key)));
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_3(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is =", 69),
+                             key, type_name_string(sc, key)));
     }
   else
     if (hash_table_checker(table) == hash_eq)
       {
-	if (is_number(key)) /* (((type(key) >= T_INTEGER) && (type(key) < T_C_MACRO)) || (type(key) == T_PAIR)), but we might want eq? */
-	  error_nr(sc, sc->wrong_type_arg_symbol,
-		   set_elist_3(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is eq?", 71),
-			       key, type_name_string(sc, key)));
+        if (is_number(key)) /* (((type(key) >= T_INTEGER) && (type(key) < T_C_MACRO)) || (type(key) == T_PAIR)), but we might want eq? */
+          error_nr(sc, sc->wrong_type_arg_symbol,
+                   set_elist_3(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is eq?", 71),
+                               key, type_name_string(sc, key)));
       }
     else
 #if WITH_PURE_S7
       if (((hash_table_checker(table) == hash_string) && (!is_string(key))) ||
-	  ((hash_table_checker(table) == hash_char) && (!is_character(key))))
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_4(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is ~A", 70),
-			     key, type_name_string(sc, key),
-			     (hash_table_checker(table) == hash_string) ? sc->string_eq_symbol : sc->char_eq_symbol));
+          ((hash_table_checker(table) == hash_char) && (!is_character(key))))
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_4(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is ~A", 70),
+                             key, type_name_string(sc, key),
+                             (hash_table_checker(table) == hash_string) ? sc->string_eq_symbol : sc->char_eq_symbol));
 #else
       if ((((hash_table_checker(table) == hash_string) || (hash_table_checker(table) == hash_ci_string)) &&
-	   (!is_string(key))) ||
-	  (((hash_table_checker(table) == hash_char) || (hash_table_checker(table) == hash_ci_char)) &&
-	   (!is_character(key))))
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_4(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is ~A", 70),
-			     key, type_name_string(sc, key),
-			     (hash_table_checker(table) == hash_string) ? sc->string_eq_symbol :
-			     ((hash_table_checker(table) == hash_ci_string) ? sc->string_ci_eq_symbol :
-			      ((hash_table_checker(table) == hash_char) ? sc->char_eq_symbol : sc->char_ci_eq_symbol))));
+           (!is_string(key))) ||
+          (((hash_table_checker(table) == hash_char) || (hash_table_checker(table) == hash_ci_char)) &&
+           (!is_character(key))))
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_4(sc, wrap_string(sc, "hash-table-set! key ~S, is ~A, but the hash-table's key function is ~A", 70),
+                             key, type_name_string(sc, key),
+                             (hash_table_checker(table) == hash_string) ? sc->string_eq_symbol :
+                             ((hash_table_checker(table) == hash_ci_string) ? sc->string_ci_eq_symbol :
+                              ((hash_table_checker(table) == hash_char) ? sc->char_eq_symbol : sc->char_ci_eq_symbol))));
 #endif
 }
 
@@ -45392,18 +45392,18 @@ static s7_pointer hash_table_set_chooser(s7_scheme *sc, s7_pointer f, int32_t ar
     {
      s7_pointer val = cadddr(expr);
      if ((is_pair(val)) && (car(val) == sc->add_symbol) && (is_proper_list_3(sc, val)) &&
-	 ((cadr(val) == int_one) || (caddr(val) == int_one)))
+         ((cadr(val) == int_one) || (caddr(val) == int_one)))
        {
-	 s7_pointer add1 = (cadr(val) == int_one) ? caddr(val) : cadr(val);
-	 if ((is_pair(add1)) && (car(add1) == sc->or_symbol) && (is_proper_list_3(sc, add1)) &&
-	     (caddr(add1) == int_zero))
-	   {
-	     s7_pointer or1 = cadr(add1);
-	     if ((is_pair(or1)) && (car(or1) == sc->hash_table_ref_symbol) && (is_proper_list_3(sc, or1)) &&
-		 (cadr(or1) == cadr(expr)) && (caddr(or1) == caddr(expr)))
-	       /* (hash-table-set! counts p (+ (or (hash-table-ref counts p) 0) 1)) */
-	       set_optimize_op(expr, HOP_HASH_TABLE_INCREMENT);
-	   }}}
+         s7_pointer add1 = (cadr(val) == int_one) ? caddr(val) : cadr(val);
+         if ((is_pair(add1)) && (car(add1) == sc->or_symbol) && (is_proper_list_3(sc, add1)) &&
+             (caddr(add1) == int_zero))
+           {
+             s7_pointer or1 = cadr(add1);
+             if ((is_pair(or1)) && (car(or1) == sc->hash_table_ref_symbol) && (is_proper_list_3(sc, or1)) &&
+                 (cadr(or1) == cadr(expr)) && (caddr(or1) == caddr(expr)))
+               /* (hash-table-set! counts p (+ (or (hash-table-ref counts p) 0) 1)) */
+               set_optimize_op(expr, HOP_HASH_TABLE_INCREMENT);
+           }}}
  return(f);
 }
 
@@ -45423,7 +45423,7 @@ static inline s7_pointer hash_table_add(s7_scheme *sc, s7_pointer table, s7_poin
 
   for (hash_entry_t *x = hash_table_element(table, loc); x; x = hash_entry_next(x))
     if ((hash_entry_raw_hash(x) == hash) &&
-	(s7_is_equal(sc, hash_entry_key(x), key)))
+        (s7_is_equal(sc, hash_entry_key(x), key)))
       return(value);
 
   p = mallocate_block(sc);
@@ -45444,18 +45444,18 @@ static s7_pointer g_hash_table_1(s7_scheme *sc, s7_pointer args, s7_pointer call
   s7_int len = proper_list_length(args);
   if (len & 1)
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~A got an odd number of arguments: ~S", 37), caller, args));
+             set_elist_3(sc, wrap_string(sc, "~A got an odd number of arguments: ~S", 37), caller, args));
   len /= 2;
   if (len > sc->max_vector_length)
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~S passed too many entries (> ~D ~D) (*s7* 'max-vector-length)", 62),
-			 caller, wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
+             set_elist_4(sc, wrap_string(sc, "~S passed too many entries (> ~D ~D) (*s7* 'max-vector-length)", 62),
+                         caller, wrap_integer(sc, len), wrap_integer(sc, sc->max_vector_length)));
 
   ht = s7_make_hash_table(sc, (len > sc->default_hash_table_length) ? len : sc->default_hash_table_length);
   if (len > 0)
     for (s7_pointer x = args, y = cdr(args); is_pair(x); x = cddr(x), y = unchecked_cdr(cdr(y)))
       if (car(y) != sc->F)
-	hash_table_add(sc, ht, car(x), car(y));
+        hash_table_add(sc, ht, car(x), car(y));
   return(ht);
 }
 
@@ -45502,10 +45502,10 @@ static void check_old_hash(s7_scheme *sc, s7_pointer old_hash, s7_pointer new_ha
   for (s7_int i = 0; i < old_len; i++)
     for (hash_entry_t *x = old_lists[i]; x; x = hash_entry_next(x))
       {
-	if (count >= end)
-	  return;
-	if (count >= start)
-	  check_hash_types(sc, new_hash, hash_entry_key(x), hash_entry_value(x));
+        if (count >= end)
+          return;
+        if (count >= start)
+          check_hash_types(sc, new_hash, hash_entry_key(x), hash_entry_value(x));
       }
 }
 
@@ -45525,36 +45525,36 @@ static s7_pointer hash_table_copy(s7_scheme *sc, s7_pointer old_hash, s7_pointer
   if (hash_table_entries(new_hash) == 0)
     {
       if ((start == 0) &&
-	  (end >= hash_table_entries(old_hash)))
-	{
-	  for (s7_int i = 0; i < old_len; i++)
-	    for (hash_entry_t *x = old_lists[i]; x; x = hash_entry_next(x))
-	      {
-		s7_int loc = hash_entry_raw_hash(x) & new_mask;
-		hash_entry_t *p = make_hash_entry(sc, hash_entry_key(x), hash_entry_value(x), hash_entry_raw_hash(x));
-		hash_entry_next(p) = new_lists[loc];
-		new_lists[loc] = p;
-	      }
-	  hash_table_entries(new_hash) = hash_table_entries(old_hash);
-	  return(new_hash);
-	}
+          (end >= hash_table_entries(old_hash)))
+        {
+          for (s7_int i = 0; i < old_len; i++)
+            for (hash_entry_t *x = old_lists[i]; x; x = hash_entry_next(x))
+              {
+                s7_int loc = hash_entry_raw_hash(x) & new_mask;
+                hash_entry_t *p = make_hash_entry(sc, hash_entry_key(x), hash_entry_value(x), hash_entry_raw_hash(x));
+                hash_entry_next(p) = new_lists[loc];
+                new_lists[loc] = p;
+              }
+          hash_table_entries(new_hash) = hash_table_entries(old_hash);
+          return(new_hash);
+        }
       for (s7_int i = 0; i < old_len; i++)
-	for (hash_entry_t *x = old_lists[i]; x; x = hash_entry_next(x))
-	  {
-	    if (count >= end)
-	      {
-		hash_table_entries(new_hash) = end - start;
-		return(new_hash);
-	      }
-	    if (count >= start)
-	      {
-		s7_int loc = hash_entry_raw_hash(x) & new_mask;
-		hash_entry_t *p = make_hash_entry(sc, hash_entry_key(x), hash_entry_value(x), hash_entry_raw_hash(x));
-		hash_entry_next(p) = new_lists[loc];
-		new_lists[loc] = p;
-	      }
-	    count++;
-	  }
+        for (hash_entry_t *x = old_lists[i]; x; x = hash_entry_next(x))
+          {
+            if (count >= end)
+              {
+                hash_table_entries(new_hash) = end - start;
+                return(new_hash);
+              }
+            if (count >= start)
+              {
+                s7_int loc = hash_entry_raw_hash(x) & new_mask;
+                hash_entry_t *p = make_hash_entry(sc, hash_entry_key(x), hash_entry_value(x), hash_entry_raw_hash(x));
+                hash_entry_next(p) = new_lists[loc];
+                new_lists[loc] = p;
+              }
+            count++;
+          }
       hash_table_entries(new_hash) = count - start;
       return(new_hash);
     }
@@ -45563,24 +45563,24 @@ static s7_pointer hash_table_copy(s7_scheme *sc, s7_pointer old_hash, s7_pointer
   for (s7_int i = 0; i < old_len; i++)
     for (hash_entry_t *x = old_lists[i]; x; x = hash_entry_next(x))
       {
-	if (count >= end)
-	  return(new_hash);
-	if (count >= start)
-	  {
-	    hash_entry_t *y = (*hash_table_checker(new_hash))(sc, new_hash, hash_entry_key(x));
-	    if (y != sc->unentry)
-	      hash_entry_set_value(y, hash_entry_value(x));
-	    else
-	      {
-		s7_int loc = hash_entry_raw_hash(x) & new_mask;
-		hash_entry_t *p = make_hash_entry(sc, hash_entry_key(x), hash_entry_value(x), hash_entry_raw_hash(x));
-		hash_entry_next(p) = new_lists[loc];
-		new_lists[loc] = p;
-		hash_table_entries(new_hash)++;
-		if (!hash_chosen(new_hash))
-		  hash_table_set_default_checker(new_hash, type(hash_entry_key(x)));
-	      }}
-	count++;
+        if (count >= end)
+          return(new_hash);
+        if (count >= start)
+          {
+            hash_entry_t *y = (*hash_table_checker(new_hash))(sc, new_hash, hash_entry_key(x));
+            if (y != sc->unentry)
+              hash_entry_set_value(y, hash_entry_value(x));
+            else
+              {
+                s7_int loc = hash_entry_raw_hash(x) & new_mask;
+                hash_entry_t *p = make_hash_entry(sc, hash_entry_key(x), hash_entry_value(x), hash_entry_raw_hash(x));
+                hash_entry_next(p) = new_lists[loc];
+                new_lists[loc] = p;
+                hash_table_entries(new_hash)++;
+                if (!hash_chosen(new_hash))
+                  hash_table_set_default_checker(new_hash, type(hash_entry_key(x)));
+              }}
+        count++;
       }
   return(new_hash);
 }
@@ -45596,49 +45596,49 @@ static s7_pointer hash_table_fill(s7_scheme *sc, s7_pointer args)
       hash_entry_t **entries = hash_table_elements(table);
       s7_int len = hash_table_size(table);   /* minimum len is 2 (see s7_make_hash_table) */
       if (val == sc->F)                      /* hash-table-ref returns #f if it can't find a key, so val == #f here means empty the table */
-	{
-	  hash_entry_t **hp = entries;
-	  hash_entry_t **hn = (hash_entry_t **)(hp + len);
-	  for (; hp < hn; hp++)
-	    {
-	      if (*hp)
-		{
-		  hash_entry_t *p = *hp;
-		  while (hash_entry_next(p)) p = hash_entry_next(p);
-		  hash_entry_next(p) = sc->block_lists[BLOCK_LIST];
-		  sc->block_lists[BLOCK_LIST] = *hp;
-		}
-	      hp++;
-	      if (*hp)
-		{
-		  hash_entry_t *p = *hp;
-		  while (hash_entry_next(p)) p = hash_entry_next(p);
-		  hash_entry_next(p) = sc->block_lists[BLOCK_LIST];
-		  sc->block_lists[BLOCK_LIST] = *hp;
-		}}
-	  if (len >= 8)
-	    memclr64(entries, len * sizeof(hash_entry_t *));
-	  else memclr(entries, len * sizeof(hash_entry_t *));
-	  if (hash_table_mapper(table) == default_hash_map)
-	    {
-	      hash_table_checker(table) = hash_empty;
-	      hash_clear_chosen(table);
-	    }
-	  hash_table_entries(table) = 0;
-	  return(val);
-	}
+        {
+          hash_entry_t **hp = entries;
+          hash_entry_t **hn = (hash_entry_t **)(hp + len);
+          for (; hp < hn; hp++)
+            {
+              if (*hp)
+                {
+                  hash_entry_t *p = *hp;
+                  while (hash_entry_next(p)) p = hash_entry_next(p);
+                  hash_entry_next(p) = sc->block_lists[BLOCK_LIST];
+                  sc->block_lists[BLOCK_LIST] = *hp;
+                }
+              hp++;
+              if (*hp)
+                {
+                  hash_entry_t *p = *hp;
+                  while (hash_entry_next(p)) p = hash_entry_next(p);
+                  hash_entry_next(p) = sc->block_lists[BLOCK_LIST];
+                  sc->block_lists[BLOCK_LIST] = *hp;
+                }}
+          if (len >= 8)
+            memclr64(entries, len * sizeof(hash_entry_t *));
+          else memclr(entries, len * sizeof(hash_entry_t *));
+          if (hash_table_mapper(table) == default_hash_map)
+            {
+              hash_table_checker(table) = hash_empty;
+              hash_clear_chosen(table);
+            }
+          hash_table_entries(table) = 0;
+          return(val);
+        }
       if ((is_typed_hash_table(table)) &&
-	  (((is_c_function(hash_table_value_typer(table))) &&
-	    (c_function_call(hash_table_value_typer(table))(sc, set_plist_1(sc, val)) == sc->F)) ||
-	   ((is_any_closure(hash_table_value_typer(table))) &&
-	    (s7_apply_function(sc, hash_table_value_typer(table), set_plist_1(sc, val)) == sc->F))))
-	{
-	  const char *tstr = make_type_name(sc, hash_table_typer_name(sc, hash_table_value_typer(table)), INDEFINITE_ARTICLE);
-	  wrong_type_error_nr(sc, sc->fill_symbol, 2, val, wrap_string(sc, tstr, safe_strlen(tstr)));
-	}
+          (((is_c_function(hash_table_value_typer(table))) &&
+            (c_function_call(hash_table_value_typer(table))(sc, set_plist_1(sc, val)) == sc->F)) ||
+           ((is_any_closure(hash_table_value_typer(table))) &&
+            (s7_apply_function(sc, hash_table_value_typer(table), set_plist_1(sc, val)) == sc->F))))
+        {
+          const char *tstr = make_type_name(sc, hash_table_typer_name(sc, hash_table_value_typer(table)), INDEFINITE_ARTICLE);
+          wrong_type_error_nr(sc, sc->fill_symbol, 2, val, wrap_string(sc, tstr, safe_strlen(tstr)));
+        }
       for (s7_int i = 0; i < len; i++)
-	for (hash_entry_t *x = entries[i]; x; x = hash_entry_next(x))
-	  hash_entry_set_value(x, val);
+        for (hash_entry_t *x = entries[i]; x; x = hash_entry_next(x))
+          hash_entry_set_value(x, val);
       /* keys haven't changed, so no need to mess with hash_table_checker */
     }
   return(val);
@@ -45715,7 +45715,7 @@ static c_proc_t *alloc_semipermanent_function(s7_scheme *sc)
 }
 
 s7_pointer s7_make_function(s7_scheme *sc, const char *name, s7_function f,
-			    s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
+                            s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
 {
   s7_pointer x = alloc_pointer(sc);
   x = make_function(sc, name, f, required_args, optional_args, rest_arg, doc, x, alloc_semipermanent_function(sc));
@@ -45724,7 +45724,7 @@ s7_pointer s7_make_function(s7_scheme *sc, const char *name, s7_function f,
 }
 
 s7_pointer s7_make_safe_function(s7_scheme *sc, const char *name, s7_function f,
-				 s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
+                                 s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
 {
   s7_pointer p = s7_make_function(sc, name, f, required_args, optional_args, rest_arg, doc);
   set_type_bit(p, T_SAFE_PROCEDURE);
@@ -45732,7 +45732,7 @@ s7_pointer s7_make_safe_function(s7_scheme *sc, const char *name, s7_function f,
 }
 
 s7_pointer s7_make_typed_function(s7_scheme *sc, const char *name, s7_function f,
-				  s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc, s7_pointer signature)
+                                  s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc, s7_pointer signature)
 {
   s7_pointer func = s7_make_function(sc, name, f, required_args, optional_args, rest_arg, doc);
   set_type_bit(func, T_SAFE_PROCEDURE);
@@ -45789,7 +45789,7 @@ static s7_pointer g_procedure_source(s7_scheme *sc, s7_pointer args)
   if ((is_symbol(p)) &&
       ((symbol_ctr(p) == 0) || ((p = s7_symbol_value(sc, p)) == sc->undefined)))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "procedure-source arg, '~S, is unbound", 37), car(args)));
+             set_elist_2(sc, wrap_string(sc, "procedure-source arg, '~S, is unbound", 37), car(args)));
   if ((is_c_function(p)) || (is_c_macro(p)))
     return(sc->nil);
 
@@ -45799,7 +45799,7 @@ static s7_pointer g_procedure_source(s7_scheme *sc, s7_pointer args)
       s7_pointer body = closure_body(p);
       /* perhaps if this function has been removed from the heap, it would be better to use copy_body (as in s7_copy)? */
       if (is_safe_closure_body(body))
-	clear_safe_closure_body(body);
+        clear_safe_closure_body(body);
       return(append_in_place(sc, list_2(sc, procedure_type_to_symbol(sc, type(p)), closure_args(p)), body));
     }
   if (!is_procedure(p))
@@ -45837,8 +45837,8 @@ and 'arglist. (define (func x y) (*function* (curlet) 'arglist)) (func 1 2): '(x
   if (is_null(args))                /* (*function*) is akin to __func__ in C */
     {
       for (e = sc->curlet; e; e = let_outlet(e))
-	if ((is_funclet(e)) || (is_maclet(e)))
-	  break;
+        if ((is_funclet(e)) || (is_maclet(e)))
+          break;
       return(let_to_function(sc, e));
     }
   e = car(args);
@@ -45848,7 +45848,7 @@ and 'arglist. (define (func x y) (*function* (curlet) 'arglist)) (func 1 2): '(x
     {
       sym = cadr(args);
       if (!is_symbol(sym))
-	wrong_type_error_nr(sc, sc->_function__symbol, 2, sym, sc->type_names[T_SYMBOL]);
+        wrong_type_error_nr(sc, sc->_function__symbol, 2, sym, sc->type_names[T_SYMBOL]);
     }
   if (e == sc->rootlet)
     return(sc->F);
@@ -45887,13 +45887,13 @@ static s7_pointer g_funclet(s7_scheme *sc, s7_pointer args)
 {
   #define H_funclet "(funclet func) tries to return a function's definition environment"
   #define Q_funclet s7_make_signature(sc, 2, s7_make_signature(sc, 2, sc->is_let_symbol, sc->is_null_symbol), \
-				      s7_make_signature(sc, 3, sc->is_procedure_symbol, sc->is_macro_symbol, sc->is_symbol_symbol))
+                                      s7_make_signature(sc, 3, sc->is_procedure_symbol, sc->is_macro_symbol, sc->is_symbol_symbol))
   s7_pointer p = car(args);
   if (is_symbol(p))
     {
       if ((symbol_ctr(p) == 0) || ((p = s7_symbol_value(sc, p)) == sc->undefined))
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_2(sc, wrap_string(sc, "funclet argument, '~S, is unbound", 33), car(args))); /* not p here */
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_2(sc, wrap_string(sc, "funclet argument, '~S, is unbound", 33), car(args))); /* not p here */
     }
   check_method(sc, p, sc->funclet_symbol, args);
   if (!((is_any_procedure(p)) || (is_c_object(p))))
@@ -45908,7 +45908,7 @@ static s7_pointer g_funclet(s7_scheme *sc, s7_pointer args)
  *   but there's no way to tell in general that the let is not exported.
  */
 s7_pointer s7_define_function(s7_scheme *sc, const char *name, s7_function fnc,
-			      s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
+                              s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
 {
   s7_pointer func = s7_make_function(sc, name, fnc, required_args, optional_args, rest_arg, doc);
   s7_pointer sym = make_symbol_with_strlen(sc, name);
@@ -45917,7 +45917,7 @@ s7_pointer s7_define_function(s7_scheme *sc, const char *name, s7_function fnc,
 }
 
 s7_pointer s7_define_safe_function(s7_scheme *sc, const char *name, s7_function fnc,
-				   s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
+                                   s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
 {
   /* returns (string->symbol name), not the c_proc_t func */
   s7_pointer func = s7_make_safe_function(sc, name, fnc, required_args, optional_args, rest_arg, doc);
@@ -45927,8 +45927,8 @@ s7_pointer s7_define_safe_function(s7_scheme *sc, const char *name, s7_function
 }
 
 s7_pointer s7_define_typed_function(s7_scheme *sc, const char *name, s7_function fnc, /* same as above, but include sig */
-				    s7_int required_args, s7_int optional_args, bool rest_arg,
-				    const char *doc, s7_pointer signature)
+                                    s7_int required_args, s7_int optional_args, bool rest_arg,
+                                    const char *doc, s7_pointer signature)
 {
   /* returns (string->symbol name), not the c_proc_t func */
   s7_pointer func = s7_make_typed_function(sc, name, fnc, required_args, optional_args, rest_arg, doc, signature); /* includes "safe" bit */
@@ -45939,9 +45939,9 @@ s7_pointer s7_define_typed_function(s7_scheme *sc, const char *name, s7_function
 }
 
 static s7_pointer define_bool_function(s7_scheme *sc, const char *name, s7_function fnc,
-				       s7_int optional_args, const char *doc, s7_pointer signature, int32_t sym_to_type,
-				       void (*marker)(s7_pointer p, s7_int top),
-				       bool simple, s7_function bool_setter)
+                                       s7_int optional_args, const char *doc, s7_pointer signature, int32_t sym_to_type,
+                                       void (*marker)(s7_pointer p, s7_int top),
+                                       bool simple, s7_function bool_setter)
 {
   s7_pointer bfunc;
   s7_pointer func = s7_make_typed_function(sc, name, fnc, 1, optional_args, false, doc, signature); /* includes "safe" bit */
@@ -45960,8 +45960,8 @@ static s7_pointer define_bool_function(s7_scheme *sc, const char *name, s7_funct
 }
 
 s7_pointer s7_define_unsafe_typed_function(s7_scheme *sc, const char *name, s7_function fnc,
-					   s7_int required_args, s7_int optional_args, bool rest_arg,
-					   const char *doc, s7_pointer signature)
+                                           s7_int required_args, s7_int optional_args, bool rest_arg,
+                                           const char *doc, s7_pointer signature)
 {
   /* returns (string->symbol name), not the c_proc_t func */
   s7_pointer func = s7_make_function(sc, name, fnc, required_args, optional_args, rest_arg, doc);
@@ -45972,8 +45972,8 @@ s7_pointer s7_define_unsafe_typed_function(s7_scheme *sc, const char *name, s7_f
 }
 
 s7_pointer s7_define_semisafe_typed_function(s7_scheme *sc, const char *name, s7_function fnc,
-					     s7_int required_args, s7_int optional_args, bool rest_arg,
-					     const char *doc, s7_pointer signature)
+                                             s7_int required_args, s7_int optional_args, bool rest_arg,
+                                             const char *doc, s7_pointer signature)
 {
   s7_pointer func = s7_make_function(sc, name, fnc, required_args, optional_args, rest_arg, doc);
   s7_pointer sym = make_symbol_with_strlen(sc, name);
@@ -46022,38 +46022,38 @@ s7_pointer s7_make_function_star(s7_scheme *sc, const char *name, s7_function fn
       /* (define* (f :allow-other-keys) 32) -> :allow-other-keys can't be the only parameter: (:allow-other-keys) */
 
       for (s7_int i = 0; i < n_args; p = cdr(p), i++)
-	{
-	  s7_pointer arg = car(p);
-	  if (arg == sc->allow_other_keys_keyword)
-	    {
-	      if (is_not_null(cdr(p)))
-		s7_warn(sc, 256, "%s :allow-other-keys should be the last parameter: %s\n", name, arglist);
-	      if (p == local_args)
-		s7_warn(sc, 256, "%s :allow-other-keys can't be the only parameter: %s\n", name, arglist);
-	      c_function_set_allow_other_keys(func); /* local_args is local, so it can't carry the bit */
-	      n_args--;
-	      c_function_optional_args(func) = n_args;
-	      c_function_max_args(func) = n_args;    /* apparently not counting keywords */
-	    }
-	  else
-	    if (is_pair(arg))                        /* there is a default */
-	      {
-		names[i] = car(arg);                 /* key can be passed at runtime as :key or key: so we need both or the symbol */
-		defaults[i] = cadr(arg);
-		remove_from_heap(sc, cadr(arg)); /* ?? */
-		if ((is_pair(defaults[i])) ||
-		    (is_normal_symbol(defaults[i])))
-		  {
-		    c_func_clear_simple_defaults(func);
-		    mark_function[T_C_FUNCTION_STAR] = mark_c_proc_star;
-		  }}
-	    else
-	      {
-		if (arg == sc->rest_keyword)
-		  s7_warn(sc, 256, "%s :rest is not supported in C-side define*: %s\n", name, arglist);
-		names[i] = arg;
-		defaults[i] = sc->F;
-	      }}}
+        {
+          s7_pointer arg = car(p);
+          if (arg == sc->allow_other_keys_keyword)
+            {
+              if (is_not_null(cdr(p)))
+                s7_warn(sc, 256, "%s :allow-other-keys should be the last parameter: %s\n", name, arglist);
+              if (p == local_args)
+                s7_warn(sc, 256, "%s :allow-other-keys can't be the only parameter: %s\n", name, arglist);
+              c_function_set_allow_other_keys(func); /* local_args is local, so it can't carry the bit */
+              n_args--;
+              c_function_optional_args(func) = n_args;
+              c_function_max_args(func) = n_args;    /* apparently not counting keywords */
+            }
+          else
+            if (is_pair(arg))                        /* there is a default */
+              {
+                names[i] = car(arg);                 /* key can be passed at runtime as :key or key: so we need both or the symbol */
+                defaults[i] = cadr(arg);
+                remove_from_heap(sc, cadr(arg)); /* ?? */
+                if ((is_pair(defaults[i])) ||
+                    (is_normal_symbol(defaults[i])))
+                  {
+                    c_func_clear_simple_defaults(func);
+                    mark_function[T_C_FUNCTION_STAR] = mark_c_proc_star;
+                  }}
+            else
+              {
+                if (arg == sc->rest_keyword)
+                  s7_warn(sc, 256, "%s :rest is not supported in C-side define*: %s\n", name, arglist);
+                names[i] = arg;
+                defaults[i] = sc->F;
+              }}}
   else set_full_type(func, T_C_FUNCTION | T_UNHEAP);
 
   s7_gc_unprotect_at(sc, gc_loc);
@@ -46096,7 +46096,7 @@ void s7_define_typed_function_star(s7_scheme *sc, const char *name, s7_function
 
 
 s7_pointer s7_define_macro(s7_scheme *sc, const char *name, s7_function fnc,
-			   s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
+                           s7_int required_args, s7_int optional_args, bool rest_arg, const char *doc)
 {
   s7_pointer func = s7_make_function(sc, name, fnc, required_args, optional_args, rest_arg, doc);
   s7_pointer sym = make_symbol_with_strlen(sc, name);
@@ -46146,7 +46146,7 @@ const char *s7_documentation(s7_scheme *sc, s7_pointer x)
     {
       if (is_keyword(x)) return(NULL);
       if (symbol_has_help(x))
-	return(symbol_help(x));
+        return(symbol_help(x));
       x = s7_symbol_value(sc, x); /* this is needed by Snd */
     }
   if ((is_any_c_function(x)) ||
@@ -46164,7 +46164,7 @@ const char *s7_documentation(s7_scheme *sc, s7_pointer x)
     {
       val = closure_body(x);
       if ((is_pair(val)) && (is_string(car(val))))
-	return((char *)string_value(car(val)));
+        return((char *)string_value(car(val)));
     }
   return(NULL);
 }
@@ -46178,8 +46178,8 @@ static s7_pointer g_documentation(s7_scheme *sc, s7_pointer args)
   if (is_symbol(p))
     {
       if ((symbol_has_help(p)) &&
-	  (is_global(p)))
-	return(s7_make_string(sc, symbol_help(p)));
+          (is_global(p)))
+        return(s7_make_string(sc, symbol_help(p)));
       p = s7_symbol_value(sc, p);
     }
   /* (documentation func) should act like (documentation abs) -- available without (openlet (funclet func)) or (openlet func)
@@ -46190,10 +46190,10 @@ static s7_pointer g_documentation(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer func = funclet_entry(sc, p, sc->documentation_symbol);
       if (func)
-	return(s7_apply_function(sc, func, args));
+        return(s7_apply_function(sc, func, args));
       func = closure_body(p);
       if ((is_pair(func)) && (is_string(car(func))))
-	return(car(func));
+        return(car(func));
     }
   /* it would be neat if this would work (define x (let ((+documentation+ "hio")) (vector 1 2 3))) (documentation x) */
   check_method(sc, p, sc->documentation_symbol, args);
@@ -46223,7 +46223,7 @@ const char *s7_help(s7_scheme *sc, s7_pointer obj)
     {
       /* here look for name */
       if (s7_documentation(sc, obj))
-	return(s7_documentation(sc, obj));
+        return(s7_documentation(sc, obj));
       obj = s7_symbol_value(sc, obj);
     }
   if (is_any_procedure(obj))
@@ -46277,20 +46277,20 @@ static s7_pointer g_signature(s7_scheme *sc, s7_pointer args)
     case T_BACRO:   case T_BACRO_STAR:
     case T_CLOSURE: case T_CLOSURE_STAR:
       {
-	s7_pointer func = funclet_entry(sc, p, sc->local_signature_symbol);
-	if (func) return(func);
-	func = funclet_entry(sc, p, sc->signature_symbol);
-	return((func) ? s7_apply_function(sc, func, args) : sc->F);
+        s7_pointer func = funclet_entry(sc, p, sc->local_signature_symbol);
+        if (func) return(func);
+        func = funclet_entry(sc, p, sc->signature_symbol);
+        return((func) ? s7_apply_function(sc, func, args) : sc->F);
       }
 
     case T_VECTOR:
       if (vector_length(p) == 0) return(sc->F); /* sig () is #f so sig #() should be #f */
       if (!is_typed_vector(p))
-	return(sc->vector_signature);
+        return(sc->vector_signature);
       {
-	s7_pointer lst = list_3(sc, typed_vector_typer_symbol(sc, p), sc->is_vector_symbol, sc->is_integer_symbol);
-	set_cdddr(lst, cddr(lst));
-	return(lst);
+        s7_pointer lst = list_3(sc, typed_vector_typer_symbol(sc, p), sc->is_vector_symbol, sc->is_integer_symbol);
+        set_cdddr(lst, cddr(lst));
+        return(lst);
       }
 
     case T_FLOAT_VECTOR: return((vector_length(p) == 0) ? sc->F : sc->float_vector_signature);
@@ -46301,16 +46301,16 @@ static s7_pointer g_signature(s7_scheme *sc, s7_pointer args)
 
     case T_HASH_TABLE:
       if (is_typed_hash_table(p))
-	return(list_3(sc,
-		      hash_table_typer_symbol(sc, hash_table_value_typer(p)),
-		      sc->is_hash_table_symbol,
-		      hash_table_typer_symbol(sc, hash_table_key_typer(p))));
+        return(list_3(sc,
+                      hash_table_typer_symbol(sc, hash_table_value_typer(p)),
+                      sc->is_hash_table_symbol,
+                      hash_table_typer_symbol(sc, hash_table_key_typer(p))));
       return(sc->hash_table_signature);
 
     case T_ITERATOR:
       p = iterator_sequence(p);
       if ((is_hash_table(p)) || (is_let(p)))   /* cons returned -- would be nice to include the car/cdr types if known */
-	return(list_1(sc, sc->is_pair_symbol));
+        return(list_1(sc, sc->is_pair_symbol));
       p = g_signature(sc, set_plist_1(sc, p));
       return(list_1(sc, (is_pair(p)) ? car(p) : sc->T));
 
@@ -46325,14 +46325,14 @@ static s7_pointer g_signature(s7_scheme *sc, s7_pointer args)
     case T_SYMBOL:
       /* this used to get the symbol's value and call g_signature on that */
       {
-	s7_pointer slot = s7_slot(sc, p);
-	if ((is_slot(slot)) && (slot_has_setter(slot)))
-	  {
-	    s7_pointer setter = slot_setter(slot);
-	    p = g_signature(sc, set_plist_1(sc, setter));
-	    if (is_pair(p))
-	      return(list_1(sc, car(p)));
-	  }}
+        s7_pointer slot = s7_slot(sc, p);
+        if ((is_slot(slot)) && (slot_has_setter(slot)))
+          {
+            s7_pointer setter = slot_setter(slot);
+            p = g_signature(sc, set_plist_1(sc, setter));
+            if (is_pair(p))
+              return(list_1(sc, car(p)));
+          }}
       break;
 
     default: break;
@@ -46511,7 +46511,7 @@ s7_pointer s7_dynamic_wind(s7_scheme *sc, s7_pointer init, s7_pointer body, s7_p
   if (jump_loc != NO_JUMP)
     {
       if (jump_loc != ERROR_JUMP)
-	eval(sc, sc->cur_op);
+        eval(sc, sc->cur_op);
     }
   else
     {
@@ -46524,15 +46524,15 @@ s7_pointer s7_dynamic_wind(s7_scheme *sc, s7_pointer init, s7_pointer body, s7_p
       dynamic_wind_out(p) = T_Ext(finish);
       push_stack(sc, OP_DYNAMIC_WIND, sc->nil, p);
       if (init != sc->F)
-	{
-	  dynamic_wind_state(p) = DWIND_INIT;
-	  sc->code = init;
-	}
+        {
+          dynamic_wind_state(p) = DWIND_INIT;
+          sc->code = init;
+        }
       else
-	{
-	  dynamic_wind_state(p) = DWIND_BODY;
-	  sc->code = body;
-	}
+        {
+          dynamic_wind_state(p) = DWIND_BODY;
+          sc->code = body;
+        }
       eval(sc, OP_APPLY);
     }
   restore_jump_info(sc);
@@ -46586,14 +46586,14 @@ static bool op_dynamic_wind(s7_scheme *sc)
     {
       dynamic_wind_state(dwind) = DWIND_FINISH;
       if (dynamic_wind_out(dwind) != sc->F)
-	{
-	  push_stack(sc, OP_DYNAMIC_WIND, sc->value, dwind);
-	  sc->code = dynamic_wind_out(dwind);
-	  sc->args = sc->nil;
-	  return(true);
-	}
+        {
+          push_stack(sc, OP_DYNAMIC_WIND, sc->value, dwind);
+          sc->code = dynamic_wind_out(dwind);
+          sc->args = sc->nil;
+          return(true);
+        }
       if (is_multiple_value(sc->value))
-	sc->value = splice_in_values(sc, multiple_value(sc->value));
+        sc->value = splice_in_values(sc, multiple_value(sc->value));
       return(false); /* goto start */
     }
   if (is_multiple_value(sc->args))       /* (+ 1 (dynamic-wind (lambda () #f) (lambda () (values 2 3 4)) (lambda () #f)) 5) */
@@ -46621,10 +46621,10 @@ static s7_pointer g_is_c_object(s7_scheme *sc, s7_pointer args)
 static noreturn void apply_error_nr(s7_scheme *sc, s7_pointer obj, s7_pointer args)
 {
   error_nr(sc, sc->syntax_error_symbol,
-	   set_elist_4(sc, wrap_string(sc, "attempt to apply ~A ~$ in ~S?", 29),
-		       (is_null(obj)) ? wrap_string(sc, "nil", 3) : ((is_symbol_and_keyword(obj)) ? wrap_string(sc, "a keyword", 9) : type_name_string(sc, obj)),
-		       obj,
-		       cons(sc, obj, args))); /* was current_code(sc) which is unreliable */
+           set_elist_4(sc, wrap_string(sc, "attempt to apply ~A ~$ in ~S?", 29),
+                       (is_null(obj)) ? wrap_string(sc, "nil", 3) : ((is_symbol_and_keyword(obj)) ? wrap_string(sc, "a keyword", 9) : type_name_string(sc, obj)),
+                       obj,
+                       cons(sc, obj, args))); /* was current_code(sc) which is unreliable */
 }
 
 static void fallback_free(void *value) {}
@@ -46667,15 +46667,15 @@ s7_int s7_make_c_type(s7_scheme *sc, const char *name) /* shouldn't this be s7_m
   if (tag >= sc->c_object_types_size)
     {
       if (sc->c_object_types_size == 0)
-	{
-	  sc->c_object_types_size = 8;
-	  sc->c_object_types = (c_object_t **)Calloc(sc->c_object_types_size, sizeof(c_object_t *));
-	}
+        {
+          sc->c_object_types_size = 8;
+          sc->c_object_types = (c_object_t **)Calloc(sc->c_object_types_size, sizeof(c_object_t *));
+        }
       else
-	{
-	  sc->c_object_types_size = tag * 2;
-	  sc->c_object_types = (c_object_t **)Realloc((void *)(sc->c_object_types), sc->c_object_types_size * sizeof(c_object_t *));
-	}}
+        {
+          sc->c_object_types_size = tag * 2;
+          sc->c_object_types = (c_object_t **)Realloc((void *)(sc->c_object_types), sc->c_object_types_size * sizeof(c_object_t *));
+        }}
   c_type = (c_object_t *)Calloc(1, sizeof(c_object_t)); /* Malloc+field=NULL is slightly faster here */
   sc->c_object_types[tag] = c_type;
   c_type->type = tag;
@@ -46823,9 +46823,9 @@ static s7_pointer c_object_type_to_let(s7_scheme *sc, s7_pointer cobj)
   c_object_t *c_type = sc->c_object_types[type];
 
   return(internal_inlet(sc, 6,
-			sc->name_symbol, c_type->scheme_name,
-			make_symbol(sc, "getter", 6), s7_object_to_string(sc, c_type->getter, false),
-			sc->setter_symbol, s7_object_to_string(sc, c_type->setter, false)));
+                        sc->name_symbol, c_type->scheme_name,
+                        make_symbol(sc, "getter", 6), s7_object_to_string(sc, c_type->getter, false),
+                        sc->setter_symbol, s7_object_to_string(sc, c_type->setter, false)));
   /* can't display equal et al in c_types -- maybe sc->F or the pointer? or add getter equivalent fields for equal et al? */
 }
 
@@ -46859,10 +46859,10 @@ static s7_pointer fx_implicit_c_object_ref_a(s7_scheme *sc, s7_pointer arg)
 /* -------- dilambda -------- */
 
 s7_pointer s7_dilambda_with_environment(s7_scheme *sc, s7_pointer envir,
-					const char *name,
-					s7_pointer (*getter)(s7_scheme *sc, s7_pointer args), s7_int get_req_args, s7_int get_opt_args,
-					s7_pointer (*setter)(s7_scheme *sc, s7_pointer args), s7_int set_req_args, s7_int set_opt_args,
-					const char *documentation)
+                                        const char *name,
+                                        s7_pointer (*getter)(s7_scheme *sc, s7_pointer args), s7_int get_req_args, s7_int get_opt_args,
+                                        s7_pointer (*setter)(s7_scheme *sc, s7_pointer args), s7_int set_req_args, s7_int set_opt_args,
+                                        const char *documentation)
 {
   s7_pointer get_func, set_func;
   char *internal_set_name;
@@ -46882,20 +46882,20 @@ s7_pointer s7_dilambda_with_environment(s7_scheme *sc, s7_pointer envir,
 }
 
 s7_pointer s7_dilambda(s7_scheme *sc,
-		       const char *name,
-		       s7_pointer (*getter)(s7_scheme *sc, s7_pointer args), s7_int get_req_args, s7_int get_opt_args,
-		       s7_pointer (*setter)(s7_scheme *sc, s7_pointer args), s7_int set_req_args, s7_int set_opt_args,
-		       const char *documentation)
+                       const char *name,
+                       s7_pointer (*getter)(s7_scheme *sc, s7_pointer args), s7_int get_req_args, s7_int get_opt_args,
+                       s7_pointer (*setter)(s7_scheme *sc, s7_pointer args), s7_int set_req_args, s7_int set_opt_args,
+                       const char *documentation)
 {
   return(s7_dilambda_with_environment(sc, sc->nil, name, getter, get_req_args, get_opt_args, setter, set_req_args, set_opt_args, documentation));
 }
 
 s7_pointer s7_typed_dilambda(s7_scheme *sc,
-			     const char *name,
-			     s7_pointer (*getter)(s7_scheme *sc, s7_pointer args), s7_int get_req_args, s7_int get_opt_args,
-			     s7_pointer (*setter)(s7_scheme *sc, s7_pointer args), s7_int set_req_args, s7_int set_opt_args,
-			     const char *documentation,
-			     s7_pointer get_sig, s7_pointer set_sig)
+                             const char *name,
+                             s7_pointer (*getter)(s7_scheme *sc, s7_pointer args), s7_int get_req_args, s7_int get_opt_args,
+                             s7_pointer (*setter)(s7_scheme *sc, s7_pointer args), s7_int set_req_args, s7_int set_opt_args,
+                             const char *documentation,
+                             s7_pointer get_sig, s7_pointer set_sig)
 {
   s7_pointer get_func = s7_dilambda(sc, name, getter, get_req_args, get_opt_args, setter, set_req_args, set_opt_args, documentation);
   s7_pointer set_func = c_function_setter(get_func);
@@ -46970,22 +46970,22 @@ static void closure_star_arity_1(s7_scheme *sc, s7_pointer x, s7_pointer args)
   if (closure_arity_unknown(x))
     {
       if (is_null(args))
-	closure_set_arity(x, 0);
+        closure_set_arity(x, 0);
       else
-	if ((is_symbol(args)) || (allows_other_keys(args)))
-	  closure_set_arity(x, -1);
-	else
-	  {
-	    s7_pointer p;
-	    int32_t i;
-	    for (i = 0, p = args; is_pair(p); i++, p = cdr(p)) /* is_pair(p) so (f1 a . b) will end with b not null */
-	      {
-		s7_pointer arg = car(p);
-		if (arg == sc->rest_keyword)
-		  break;
-	      }
-	    closure_set_arity(x, ((is_null(p)) ? i : -1));  /* see below */
-	  }}
+        if ((is_symbol(args)) || (allows_other_keys(args)))
+          closure_set_arity(x, -1);
+        else
+          {
+            s7_pointer p;
+            int32_t i;
+            for (i = 0, p = args; is_pair(p); i++, p = cdr(p)) /* is_pair(p) so (f1 a . b) will end with b not null */
+              {
+                s7_pointer arg = car(p);
+                if (arg == sc->rest_keyword)
+                  break;
+              }
+            closure_set_arity(x, ((is_null(p)) ? i : -1));  /* see below */
+          }}
 }
 
 static s7_pointer closure_star_arity_to_cons(s7_scheme *sc, s7_pointer x, s7_pointer x_args)
@@ -47003,13 +47003,13 @@ static int32_t closure_arity_to_int(s7_scheme *sc, s7_pointer x)
       s7_pointer b;
       for (i = 0, b = closure_args(x); is_pair(b); i++, b = cdr(b)) {};
       if (is_null(b))
-	closure_set_arity(x, i);
+        closure_set_arity(x, i);
       else
-	{
-	  if (i == 0)
-	    return(-1);
-	  closure_set_arity(x, -i);
-	}}
+        {
+          if (i == 0)
+            return(-1);
+          closure_set_arity(x, -i);
+        }}
   return(closure_arity(x));
 }
 
@@ -47096,7 +47096,7 @@ static bool closure_star_is_aritable(s7_scheme *sc, s7_pointer x, s7_pointer x_a
     return(true);
   closure_star_arity_1(sc, x, x_args);
   return((closure_arity(x) == -1) ||
-	 (args <= closure_arity(x)));
+         (args <= closure_arity(x)));
 }
 
 bool s7_is_aritable(s7_scheme *sc, s7_pointer x, s7_int args)
@@ -47107,8 +47107,8 @@ bool s7_is_aritable(s7_scheme *sc, s7_pointer x, s7_int args)
       return(c_function_is_aritable(x, args));
     case T_C_RST_NO_REQ_FUNCTION:
       if ((x == initial_value(sc->hash_table_symbol)) ||  /* these two need a value for each key */
-	  (x == initial_value(sc->weak_hash_table_symbol)))
-	return((args & 1) == 0);
+          (x == initial_value(sc->weak_hash_table_symbol)))
+        return((args & 1) == 0);
     case T_C_FUNCTION_STAR:
       return(c_function_max_args(x) >= args);
 
@@ -47120,7 +47120,7 @@ bool s7_is_aritable(s7_scheme *sc, s7_pointer x, s7_int args)
 
     case T_C_MACRO:
       return((c_macro_min_args(x) <= args) &&
-	     (c_macro_max_args(x) >= args));
+             (c_macro_max_args(x) >= args));
 
     case T_GOTO: case T_CONTINUATION:
       return(true);
@@ -47130,17 +47130,17 @@ bool s7_is_aritable(s7_scheme *sc, s7_pointer x, s7_int args)
 
     case T_C_OBJECT:
       {
-	s7_pointer func;
-	if ((has_active_methods(sc, x)) &&
-	    ((func = find_method_with_let(sc, x, sc->is_aritable_symbol)) != sc->undefined))
-	  return(s7_apply_function(sc, func, set_plist_2(sc, x, make_integer(sc, args))) != sc->F);
-	return(is_safe_procedure(x));
+        s7_pointer func;
+        if ((has_active_methods(sc, x)) &&
+            ((func = find_method_with_let(sc, x, sc->is_aritable_symbol)) != sc->undefined))
+          return(s7_apply_function(sc, func, set_plist_2(sc, x, make_integer(sc, args))) != sc->F);
+        return(is_safe_procedure(x));
       }
 
     case T_VECTOR: case T_INT_VECTOR: case T_FLOAT_VECTOR: case T_BYTE_VECTOR:
       return((args > 0) &&
-	     (vector_length(x) > 0) &&   /* (#() 0) -> error */
-	     (args <= vector_rank(x)));
+             (vector_length(x) > 0) &&   /* (#() 0) -> error */
+             (args <= vector_rank(x)));
 
     case T_LET: case T_HASH_TABLE: case T_PAIR: /* for hash-table, this refers to (table 'key) */
       return(args == 1);
@@ -47215,8 +47215,8 @@ static s7_pointer b_simple_setter(s7_scheme *sc, int32_t typer, s7_pointer args)
 {
   if (type(cadr(args)) != typer)
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_5(sc, wrap_string(sc, "set! ~S, ~S is ~A but should be ~A", 34),
-			 car(args), cadr(args), sc->type_names[type(cadr(args))], sc->type_names[typer]));
+             set_elist_5(sc, wrap_string(sc, "set! ~S, ~S is ~A but should be ~A", 34),
+                         car(args), cadr(args), sc->type_names[type(cadr(args))], sc->type_names[typer]));
   return(cadr(args));
 }
 
@@ -47244,13 +47244,13 @@ static s7_pointer b_is_unspecified_setter(s7_scheme *sc, s7_pointer args)  {retu
 static s7_pointer b_is_c_object_setter(s7_scheme *sc, s7_pointer args)     {return(b_simple_setter(sc, T_C_OBJECT, args));}
 static s7_pointer b_is_goto_setter(s7_scheme *sc, s7_pointer args)         {return(b_simple_setter(sc, T_GOTO, args));}
 
-#define b_setter(sc, typer, args, str, len)	\
-  do {						\
-    if (!typer(cadr(args)))			\
-      error_nr(sc, sc->wrong_type_arg_symbol,			\
-	       set_elist_5(sc, wrap_string(sc, "set! ~S, ~S is ~A but should be ~A", 34), \
-			   car(args), cadr(args), sc->type_names[type(cadr(args))], wrap_string(sc, str, len))); \
-    return(cadr(args));							\
+#define b_setter(sc, typer, args, str, len)        \
+  do {                                                \
+    if (!typer(cadr(args)))                        \
+      error_nr(sc, sc->wrong_type_arg_symbol,                        \
+               set_elist_5(sc, wrap_string(sc, "set! ~S, ~S is ~A but should be ~A", 34), \
+                           car(args), cadr(args), sc->type_names[type(cadr(args))], wrap_string(sc, str, len))); \
+    return(cadr(args));                                                        \
   } while (0)
 
 static s7_pointer b_is_number_setter(s7_scheme *sc, s7_pointer args)      {b_setter(sc, s7_is_complex, args, "a number", 8);}
@@ -47276,8 +47276,8 @@ static s7_pointer b_is_proper_list_setter(s7_scheme *sc, s7_pointer args)
 {
   if (!s7_is_proper_list(sc, car(args)))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_5(sc, wrap_string(sc, "set! ~S, ~S is ~A but should be ~A", 34),
-			 car(args), cadr(args), sc->type_names[type(cadr(args))], wrap_string(sc, "a proper list", 13)));
+             set_elist_5(sc, wrap_string(sc, "set! ~S, ~S is ~A but should be ~A", 34),
+                         car(args), cadr(args), sc->type_names[type(cadr(args))], wrap_string(sc, "a proper list", 13)));
   return(cadr(args));
 }
 
@@ -47289,17 +47289,17 @@ static s7_pointer lambda_setter(s7_scheme *sc, s7_pointer p)
     {
       s7_pointer f = funclet_entry(sc, p, sc->local_setter_symbol); /* look for +setter+, save value as closure_setter(p) */
       if (f)
-	{
-	  if (f == sc->F)
-	    {
-	      closure_set_no_setter(p);
-	      return(sc->F);
-	    }
-	  if (!is_any_procedure(f))
-	    sole_arg_wrong_type_error_nr(sc, sc->setter_symbol, p, wrap_string(sc, "a procedure or a reasonable facsimile thereof", 45));
-	  closure_set_setter(p, f);
-	  return(f);
-	}
+        {
+          if (f == sc->F)
+            {
+              closure_set_no_setter(p);
+              return(sc->F);
+            }
+          if (!is_any_procedure(f))
+            sole_arg_wrong_type_error_nr(sc, sc->setter_symbol, p, wrap_string(sc, "a procedure or a reasonable facsimile thereof", 45));
+          closure_set_setter(p, f);
+          return(f);
+        }
       /* we used to search for setter here, but that can find the built-in setter causing an infinite loop (maybe check for that??) */
       closure_set_no_setter(p);
     }
@@ -47405,10 +47405,10 @@ static void protect_setter(s7_scheme *sc, s7_pointer sym, s7_pointer fnc)
       vector_length(sc->protected_setter_symbols) = new_size;
 
       for (s7_int i = size; i < new_size; i++)
-	{
-	  vector_element(sc->protected_setters, i) = sc->unused;
-	  vector_element(sc->protected_setter_symbols, i) = sc->unused;
-	}
+        {
+          vector_element(sc->protected_setters, i) = sc->unused;
+          vector_element(sc->protected_setter_symbols, i) = sc->unused;
+        }
       sc->protected_setters_size = new_size;
     }
   loc = sc->protected_setters_loc++;
@@ -47427,13 +47427,13 @@ static s7_pointer symbol_set_setter(s7_scheme *sc, s7_pointer sym, s7_pointer ar
       s7_pointer e = cadr(args); /* (let ((x 1)) (set! (setter 'x (curlet)) (lambda (s v e) ...))) */
       func = caddr(args);
       if (e == sc->rootlet)
-	slot = global_slot(sym);
+        slot = global_slot(sym);
       else
-	{
-	  if (!is_let(e))
-	    wrong_type_error_nr(sc, wrap_string(sc, "set! setter", 11), 2, e, sc->type_names[T_LET]);
-	  slot = lookup_slot_with_let(sc, sym, e);
-	}}
+        {
+          if (!is_let(e))
+            wrong_type_error_nr(sc, wrap_string(sc, "set! setter", 11), 2, e, sc->type_names[T_LET]);
+          slot = lookup_slot_with_let(sc, sym, e);
+        }}
   else
     {
       slot = s7_slot(sc, sym); /* (set! (setter 'x) (lambda (s v) ...)) */
@@ -47445,23 +47445,23 @@ static s7_pointer symbol_set_setter(s7_scheme *sc, s7_pointer sym, s7_pointer ar
   if (func != sc->F)
     {
       if (sym == sc->setter_symbol)
-	immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't set (setter 'setter) to ~S", 32), func));
+        immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't set (setter 'setter) to ~S", 32), func));
       if (is_syntax_or_qq(slot_value(slot)))         /* (set! (setter 'begin) ...), qq is syntax sez r7rs */
-	immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't set (setter '~S) to ~S", 28), sym, func));
+        immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't set (setter '~S) to ~S", 28), sym, func));
       if (!is_any_procedure(func))   /* disallow continuation/goto here */
-	wrong_type_error_nr(sc, wrap_string(sc, "set! setter", 11), 3, func, wrap_string(sc, "a function or #f", 16));
+        wrong_type_error_nr(sc, wrap_string(sc, "set! setter", 11), 3, func, wrap_string(sc, "a function or #f", 16));
       if (func == global_value(sc->values_symbol))
-	error_nr(sc, make_symbol(sc, "invalid-setter", 14),
-		 set_elist_2(sc, wrap_string(sc, "~S's setter can't be values", 27), sym));
+        error_nr(sc, make_symbol(sc, "invalid-setter", 14),
+                 set_elist_2(sc, wrap_string(sc, "~S's setter can't be values", 27), sym));
       if ((!is_c_function(func)) || (!c_function_has_bool_setter(func)))
-	{
-	  if (s7_is_aritable(sc, func, 3))
-	    set_has_let_arg(func);
-	  else
-	    if (!s7_is_aritable(sc, func, 2))
-	      error_nr(sc, sc->wrong_type_arg_symbol,
-		       set_elist_2(sc, wrap_string(sc, "symbol setter function, ~A, should take 2 or 3 arguments", 56), func));
-	}}
+        {
+          if (s7_is_aritable(sc, func, 3))
+            set_has_let_arg(func);
+          else
+            if (!s7_is_aritable(sc, func, 2))
+              error_nr(sc, sc->wrong_type_arg_symbol,
+                       set_elist_2(sc, wrap_string(sc, "symbol setter function, ~A, should take 2 or 3 arguments", 56), func));
+        }}
   if (slot == global_slot(sym))
     s7_set_setter(sc, sym, func);   /* special GC protection for global vars */
   else slot_set_setter(slot, func); /* func might be #f */
@@ -47482,13 +47482,13 @@ static s7_pointer g_set_setter(s7_scheme *sc, s7_pointer args)
   if (setter != sc->F)
     {
       if (!is_any_procedure(setter))
-	wrong_type_error_nr(sc, wrap_string(sc, "set! setter", 11), 2, setter, wrap_string(sc, "a procedure or #f", 17));
+        wrong_type_error_nr(sc, wrap_string(sc, "set! setter", 11), 2, setter, wrap_string(sc, "a procedure or #f", 17));
       if (arity_to_int(sc, setter) < 1)          /* we need at least an arg for the set! value */
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_2(sc, wrap_string(sc, "setter function, ~A, should take at least one argument", 54), setter));
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_2(sc, wrap_string(sc, "setter function, ~A, should take at least one argument", 54), setter));
       if (setter == global_value(sc->values_symbol))
-	error_nr(sc, make_symbol(sc, "invalid-setter", 14),
-		 set_elist_2(sc, wrap_string(sc, "~S's setter can't be values", 27), p));
+        error_nr(sc, make_symbol(sc, "invalid-setter", 14),
+                 set_elist_2(sc, wrap_string(sc, "~S's setter can't be values", 27), p));
     }
   switch (type(p))
     {
@@ -47497,25 +47497,25 @@ static s7_pointer g_set_setter(s7_scheme *sc, s7_pointer args)
     case T_CLOSURE: case T_CLOSURE_STAR:
       closure_set_setter(p, setter);
       if (setter == sc->F)
-	closure_set_no_setter(p);
+        closure_set_no_setter(p);
       break;
 
     case T_C_FUNCTION: case T_C_FUNCTION_STAR: case T_C_RST_NO_REQ_FUNCTION:
       if (p == global_value(sc->setter_symbol))      /* (immutable? (setter setter)) is #t, but we aren't checking immutable? here -- maybe we should? */
-	immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't set (setter setter) to ~S", 31), setter));
+        immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't set (setter setter) to ~S", 31), setter));
       if (p == global_value(sc->values_symbol))       /* 6-Oct-23 (set! (setter values) ...) is problematic, see splice_in_values */
-	immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't set (setter values) to ~S", 31), setter));
+        immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "can't set (setter values) to ~S", 31), setter));
       c_function_set_setter(p, setter);
       if ((is_any_closure(setter)) ||
-	  (is_any_macro(setter)))
-	add_setter(sc, p, setter);
+          (is_any_macro(setter)))
+        add_setter(sc, p, setter);
       break;
 
     case T_C_MACRO:
       c_macro_set_setter(p, setter);
       if ((is_any_closure(setter)) ||
-	  (is_any_macro(setter)))
-	add_setter(sc, p, setter);
+          (is_any_macro(setter)))
+        add_setter(sc, p, setter);
       break;
 
     default:  /* (set! (setter 4) ...) or p==continuation etc */
@@ -47529,28 +47529,28 @@ s7_pointer s7_set_setter(s7_scheme *sc, s7_pointer p, s7_pointer setter)
   if (is_symbol(p))
     {
       if (slot_has_setter(global_slot(p)))
-	for (s7_int index = 0; index < sc->protected_setters_loc; index++)
-	  if (vector_element(sc->protected_setter_symbols, index) == p)
-	    {
-	      s7_pointer old_func = vector_element(sc->protected_setters, index);
-	      if ((is_any_procedure(old_func)) && /* i.e. not #f! */
-		  (is_immutable(old_func)))
-		return(setter);
-	      vector_element(sc->protected_setters, index) = setter;
-	      slot_set_setter(global_slot(p), setter);
-	      if ((setter != sc->F) && (s7_is_aritable(sc, setter, 3)))
-		set_has_let_arg(setter);
-	      return(setter);
-	    }
+        for (s7_int index = 0; index < sc->protected_setters_loc; index++)
+          if (vector_element(sc->protected_setter_symbols, index) == p)
+            {
+              s7_pointer old_func = vector_element(sc->protected_setters, index);
+              if ((is_any_procedure(old_func)) && /* i.e. not #f! */
+                  (is_immutable(old_func)))
+                return(setter);
+              vector_element(sc->protected_setters, index) = setter;
+              slot_set_setter(global_slot(p), setter);
+              if ((setter != sc->F) && (s7_is_aritable(sc, setter, 3)))
+                set_has_let_arg(setter);
+              return(setter);
+            }
       if (setter != sc->F)
-	{
-	  slot_set_has_setter(global_slot(p));
-	  if (!is_c_function(setter)) protect_setter(sc, p, T_Clo(setter)); /* these don't need GC protection */
-	  slot_set_setter(global_slot(p), setter);
-	  if (s7_is_aritable(sc, setter, 3))
-	    set_has_let_arg(setter);
-	  return(setter);
-	}
+        {
+          slot_set_has_setter(global_slot(p));
+          if (!is_c_function(setter)) protect_setter(sc, p, T_Clo(setter)); /* these don't need GC protection */
+          slot_set_setter(global_slot(p), setter);
+          if (s7_is_aritable(sc, setter, 3))
+            set_has_let_arg(setter);
+          return(setter);
+        }
       slot_set_setter(global_slot(p), sc->F);
       return(sc->F);
     }
@@ -47614,7 +47614,7 @@ s7_pointer s7_hook_set_functions(s7_scheme *sc, s7_pointer hook, s7_pointer func
 bool s7_is_eq(s7_pointer obj1, s7_pointer obj2)
 {
   return((obj1 == obj2) ||                                     /* so floats and NaNs might be eq? but not eqv? */
-	 ((is_unspecified(obj1)) && (is_unspecified(obj2))));  /* this is needed because this function is used by s7_b_pp */
+         ((is_unspecified(obj1)) && (is_unspecified(obj2))));  /* this is needed because this function is used by s7_b_pp */
 }
 
 static s7_pointer is_eq_p_pp(s7_scheme *sc, s7_pointer obj1, s7_pointer obj2)
@@ -47627,7 +47627,7 @@ static s7_pointer g_is_eq(s7_scheme *sc, s7_pointer args)
   #define H_is_eq "(eq? obj1 obj2) returns #t if obj1 is eq to (the same object as) obj2"
   #define Q_is_eq sc->pcl_bt
   return(make_boolean(sc, ((car(args) == cadr(args)) ||
-			   ((is_unspecified(car(args))) && (is_unspecified(cadr(args)))))));
+                           ((is_unspecified(car(args))) && (is_unspecified(cadr(args)))))));
   /* (eq? (apply apply apply values '(())) #<unspecified>) should return #t */
 }
 
@@ -47684,10 +47684,10 @@ static bool symbol_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_
     return((is_keyword(x)) && (keyword_symbol(x) == keyword_symbol(y))); /* (equivalent? key: :key) -> #t */
   if (is_keyword(x)) return(false);
   return((is_slot(global_slot(x))) &&                 /* the optimizer can replace the original symbol with its value */
-	 (is_syntax(global_value(x))) &&
-	 (is_slot(global_slot(y))) &&
-	 (is_syntax(global_value(y))) &&
-	 (syntax_symbol(global_value(x)) == syntax_symbol(global_value(y))));
+         (is_syntax(global_value(x))) &&
+         (is_slot(global_slot(y))) &&
+         (is_syntax(global_value(y))) &&
+         (syntax_symbol(global_value(x)) == syntax_symbol(global_value(y))));
 }
 
 static bool unspecified_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t *ci)
@@ -47698,8 +47698,8 @@ static bool unspecified_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_
 static bool undefined_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t *ci)
 {
   return((x == y) ||
-	 ((is_undefined(y)) && (undefined_name_length(x) == undefined_name_length(y)) &&
-	  (safe_strcmp(undefined_name(x), undefined_name(y)))));
+         ((is_undefined(y)) && (undefined_name_length(x) == undefined_name_length(y)) &&
+          (safe_strcmp(undefined_name(x), undefined_name(y)))));
 }
 
 static bool is_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t *ci)
@@ -47722,13 +47722,13 @@ static bool c_pointer_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shar
     {
       if (!nci) nci = clear_shared_info(sc->circle_info);
       if (!is_equivalent_1(sc, c_pointer_type(x), c_pointer_type(y), nci))
-	return(false);
+        return(false);
     }
   if (c_pointer_info(x) != c_pointer_info(y))
     {
       if (!nci) nci = clear_shared_info(sc->circle_info);
       if (!is_equivalent_1(sc, c_pointer_info(x), c_pointer_info(y), nci))
-	return(false);
+        return(false);
     }
   return(true);
 }
@@ -47743,13 +47743,13 @@ static bool c_pointer_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_in
     {
       if (!nci) nci = clear_shared_info(sc->circle_info);
       if (!is_equal_1(sc, c_pointer_type(x), c_pointer_type(y), nci))
-	return(false);
+        return(false);
     }
   if (c_pointer_info(x) != c_pointer_info(y))
     {
       if (!nci) nci = clear_shared_info(sc->circle_info);
       if (!is_equal_1(sc, c_pointer_info(x), c_pointer_info(y), nci))
-	return(false);
+        return(false);
     }
   return(true);
 }
@@ -47777,15 +47777,15 @@ static bool port_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_in
     {
     case STRING_PORT:
       return((port_position(x) == port_position(y)) &&
-	     (port_data_size(x) == port_data_size(y)) &&
-	     (local_strncmp((const char *)port_data(x), (const char *)port_data(y), (is_input_port(x)) ? port_data_size(x) : port_position(x))));
+             (port_data_size(x) == port_data_size(y)) &&
+             (local_strncmp((const char *)port_data(x), (const char *)port_data(y), (is_input_port(x)) ? port_data_size(x) : port_position(x))));
     case FILE_PORT:
       return((is_input_port(x)) &&
-	     (port_position(x) == port_position(y)) &&
-	     (local_strncmp((const char *)port_filename(x), (const char *)port_filename(y), port_filename_length(x))));
+             (port_position(x) == port_position(y)) &&
+             (local_strncmp((const char *)port_filename(x), (const char *)port_filename(y), port_filename_length(x))));
     case FUNCTION_PORT:
       if (is_input_port(x))
-	return(port_input_function(x) == port_input_function(y));
+        return(port_input_function(x) == port_input_function(y));
       return(port_output_function(x) == port_output_function(y));
     }
   return(false);
@@ -47809,24 +47809,24 @@ static Inline bool inline_equal_ref(s7_scheme *sc, s7_pointer x, s7_pointer y, s
     {
       int32_t ref_x = peek_shared_ref_1(ci, x);
       if (ref_y != 0)
-	return(ref_x == ref_y);	/* this is a change from the macro version 16-Jan-20 -- only true returns from the caller */
+        return(ref_x == ref_y);        /* this is a change from the macro version 16-Jan-20 -- only true returns from the caller */
       /* try to harmonize the new guy -- there can be more than one structure equal to the current one */
       if (ref_x != 0)
-	add_shared_ref(ci, y, ref_x);
+        add_shared_ref(ci, y, ref_x);
     }
   else
     if (ref_y != 0)
       add_shared_ref(ci, x, ref_y);
     else
       {
-	/* assume neither x nor y is in the table, and that they should share a ref value, called only in equality check, not printer */
-	if (ci->top >= ci->size2) enlarge_shared_info(ci);
-	set_collected(x);
-	set_collected(y);
-	ci->objs[ci->top] = x;
-	ci->refs[ci->top++] = ++ci->ref;
-	ci->objs[ci->top] = y;
-	ci->refs[ci->top++] = ci->ref;
+        /* assume neither x nor y is in the table, and that they should share a ref value, called only in equality check, not printer */
+        if (ci->top >= ci->size2) enlarge_shared_info(ci);
+        set_collected(x);
+        set_collected(y);
+        ci->objs[ci->top] = x;
+        ci->refs[ci->top++] = ++ci->ref;
+        ci->objs[ci->top] = y;
+        ci->refs[ci->top++] = ci->ref;
       }
   return(false);
 }
@@ -47867,13 +47867,13 @@ static bool c_objects_are_equal(s7_scheme *sc, s7_pointer a, s7_pointer b, share
 }
 
 #define check_equivalent_method(Sc, X, Y) \
-  do {						 \
-    if (has_active_methods(sc, X))					\
-      {									\
-	s7_pointer equal_func = find_method_with_let(Sc, X, Sc->is_equivalent_symbol); \
-	if (equal_func != Sc->undefined)				\
-	  return(s7_boolean(Sc, s7_apply_function(Sc, equal_func, set_plist_2(Sc, X, Y)))); \
-      }}								\
+  do {                                                 \
+    if (has_active_methods(sc, X))                                        \
+      {                                                                        \
+        s7_pointer equal_func = find_method_with_let(Sc, X, Sc->is_equivalent_symbol); \
+        if (equal_func != Sc->undefined)                                \
+          return(s7_boolean(Sc, s7_apply_function(Sc, equal_func, set_plist_2(Sc, X, Y)))); \
+      }}                                                                \
     while (0)
 
 static bool c_objects_are_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t *ci)
@@ -47897,7 +47897,7 @@ static bool hash_table_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
   if (!is_hash_table(y))
     {
       if (equivalent)
-	check_equivalent_method(sc, y, x);
+        check_equivalent_method(sc, y, x);
       return(false);
     }
   if ((ci) && (equal_ref(sc, x, y, ci))) return(true);
@@ -47909,9 +47909,9 @@ static bool hash_table_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
   if ((!equivalent) && ((hash_table_mapper(x) != default_hash_map) || (hash_table_mapper(y) != default_hash_map)))
     {
       if (hash_table_checker(x) != hash_table_checker(y))
-	return(false);
+        return(false);
       if (hash_table_mapper(x) != hash_table_mapper(y))
-	return(false);
+        return(false);
     }
 
   len = hash_table_size(x);
@@ -47923,14 +47923,14 @@ static bool hash_table_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
   if ((hf != hash_equal) && (hf != hash_equivalent))
     {
       for (s7_int i = 0; i < len; i++)
-	for (hash_entry_t *p = lists[i]; p; p = hash_entry_next(p))
-	  {
-	    hash_entry_t *y_val = hf(sc, y, hash_entry_key(p));
-	    if (y_val == sc->unentry)
-	      return(false);
-	    if (!eqf(sc, hash_entry_value(p), hash_entry_value(y_val), nci))
-	      return(false);
-	  }
+        for (hash_entry_t *p = lists[i]; p; p = hash_entry_next(p))
+          {
+            hash_entry_t *y_val = hf(sc, y, hash_entry_key(p));
+            if (y_val == sc->unentry)
+              return(false);
+            if (!eqf(sc, hash_entry_value(p), hash_entry_value(y_val), nci))
+              return(false);
+          }
       /* if we get here, every key/value in x has a corresponding key/value in y, and the number of entries match, so surely the tables are equal??
        * if ci not null or hash-table-checker is equal/eqivalent, can't use hf?
        */
@@ -47943,19 +47943,19 @@ static bool hash_table_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
   for (s7_int i = 0; i < len; i++)
     for (hash_entry_t *p = lists[i]; p; p = hash_entry_next(p))
       {
-	s7_pointer key = hash_entry_key(p);
-	s7_int hash = hash_loc(sc, y, key);
-	s7_int loc = hash & hash_table_mask(y);
-	hash_entry_t *xe;
-
-	for (xe = hash_table_element(y, loc); xe; xe = hash_entry_next(xe))
-	  if ((hash_entry_raw_hash(xe) == hash) &&
-	      (eqf(sc, hash_entry_key(xe), key, nci)))
-	    break;
-	if (!xe)
-	  return(false);
-	if (!eqf(sc, hash_entry_value(p), hash_entry_value(xe), nci))
-	  return(false);
+        s7_pointer key = hash_entry_key(p);
+        s7_int hash = hash_loc(sc, y, key);
+        s7_int loc = hash & hash_table_mask(y);
+        hash_entry_t *xe;
+
+        for (xe = hash_table_element(y, loc); xe; xe = hash_entry_next(xe))
+          if ((hash_entry_raw_hash(xe) == hash) &&
+              (eqf(sc, hash_entry_key(xe), key, nci)))
+            break;
+        if (!xe)
+          return(false);
+        if (!eqf(sc, hash_entry_value(p), hash_entry_value(xe), nci))
+          return(false);
       }
   return(true);
 }
@@ -47968,7 +47968,7 @@ static bool slots_match(s7_scheme *sc, s7_pointer px, s7_pointer y, shared_info_
   for (s7_pointer ey = y; ey; ey = let_outlet(ey))
     for (s7_pointer py = let_slots(ey); tis_slot(py); py = next_slot(py))
       if (slot_symbol(px) == slot_symbol(py)) /* we know something will match */
-	return(is_equal_1(sc, slot_value(px), slot_value(py), nci));
+        return(is_equal_1(sc, slot_value(px), slot_value(py), nci));
   return(false);
 }
 
@@ -47977,7 +47977,7 @@ static bool slots_equivalent_match(s7_scheme *sc, s7_pointer px, s7_pointer y, s
   for (s7_pointer ey = y; ey; ey = let_outlet(ey))
     for (s7_pointer py = let_slots(ey); tis_slot(py); py = next_slot(py))
       if (slot_symbol(px) == slot_symbol(py)) /* we know something will match */
-	return(is_equivalent_1(sc, slot_value(px), slot_value(py), nci));
+        return(is_equivalent_1(sc, slot_value(px), slot_value(py), nci));
   return(false);
 }
 
@@ -47996,23 +47996,23 @@ static bool let_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t
   for (x_len = 0, ex = x; ex; ex = let_outlet(ex))
     for (px = let_slots(ex); tis_slot(px); px = next_slot(px))
       if (!symbol_is_in_list(sc, slot_symbol(px)))
-	{
-	  add_symbol_to_list(sc, slot_symbol(px));
-	  x_len++;
-	}
+        {
+          add_symbol_to_list(sc, slot_symbol(px));
+          x_len++;
+        }
 
   for (ey = y; ey; ey = let_outlet(ey))
     for (py = let_slots(ey); tis_slot(py); py = next_slot(py))
       if (!symbol_is_in_list(sc, slot_symbol(py)))           /* symbol in y, not in x */
-	return(false);
+        return(false);
 
   for (y_len = 0, ey = y; ey; ey = let_outlet(ey))
     for (py = let_slots(ey); tis_slot(py); py = next_slot(py))
       if (symbol_tag(slot_symbol(py)) != 0)
-	{
-	  y_len++;
-	  symbol_set_tag(slot_symbol(py), 0);
-	}
+        {
+          y_len++;
+          symbol_set_tag(slot_symbol(py), 0);
+        }
 
   if (x_len != y_len)                                        /* symbol in x, not in y */
     return(false);
@@ -48022,12 +48022,12 @@ static bool let_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t
   for (ex = x; ex; ex = let_outlet(ex))
     for (px = let_slots(ex); tis_slot(px); px = next_slot(px))
       if (symbol_tag(slot_symbol(px)) == 0)                  /* unshadowed */
-	{
-	  symbol_set_tag(slot_symbol(px), sc->syms_tag);     /* values don't match */
-	  if (((!equivalent) && (!slots_match(sc, px, y, nci))) ||
-	      ((equivalent) && (!slots_equivalent_match(sc, px, y, nci))))
-	    return(false);
-	}
+        {
+          symbol_set_tag(slot_symbol(px), sc->syms_tag);     /* values don't match */
+          if (((!equivalent) && (!slots_match(sc, px, y, nci))) ||
+              ((equivalent) && (!slots_equivalent_match(sc, px, y, nci))))
+            return(false);
+        }
   return(true);
 }
 
@@ -48060,7 +48060,7 @@ static bool closure_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info
     {
       s7_pointer equal_func = find_method(sc, closure_let(x), sc->is_equal_symbol);
       if (equal_func != sc->undefined)
-	return(s7_boolean(sc, s7_apply_function(sc, equal_func, set_plist_2(sc, x, y))));
+        return(s7_boolean(sc, s7_apply_function(sc, equal_func, set_plist_2(sc, x, y))));
     }
   return(false);
 }
@@ -48077,7 +48077,7 @@ static bool closure_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
    *   because locally defined constant functions on the second pass find the outer let.
    */
   return((is_equivalent_1(sc, closure_args(x), closure_args(y), ci)) &&
-	 (is_equivalent_1(sc, closure_body(x), closure_body(y), ci)));
+         (is_equivalent_1(sc, closure_body(x), closure_body(y), ci)));
 }
 
 static bool pair_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t *ci)
@@ -48179,13 +48179,13 @@ static bool biv_meq(s7_pointer x, s7_pointer y)
   return(true);
 }
 
-#define base_vector_equal(sc, x, y)			\
-  do {							\
-    if (x == y) return(true);				\
-    len = vector_length(x);				\
-    if (len != vector_length(y)) return(false);		\
-    if (!vector_rank_match(sc, x, y)) return(false);	\
-    if (len == 0) return(true);				\
+#define base_vector_equal(sc, x, y)                        \
+  do {                                                        \
+    if (x == y) return(true);                                \
+    len = vector_length(x);                                \
+    if (len != vector_length(y)) return(false);                \
+    if (!vector_rank_match(sc, x, y)) return(false);        \
+    if (len == 0) return(true);                                \
   } while (0)
 
 static bool vector_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t *ci)
@@ -48198,20 +48198,20 @@ static bool vector_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_
   if (type(x) != type(y))
     {
       if ((is_int_vector(x)) && (is_byte_vector(y)))
-	return(biv_meq(y, x));
+        return(biv_meq(y, x));
       if ((is_byte_vector(x)) && (is_int_vector(y)))
-	return(biv_meq(x, y));
+        return(biv_meq(x, y));
       for (s7_int i = 0; i < len; i++)
-	if (!is_equal_1(sc, vector_getter(x)(sc, x, i), vector_getter(y)(sc, y, i), NULL)) /* this could be greatly optimized */
-	  return(false);
+        if (!is_equal_1(sc, vector_getter(x)(sc, x, i), vector_getter(y)(sc, y, i), NULL)) /* this could be greatly optimized */
+          return(false);
       return(true);
     }
   if (!has_simple_elements(x))
     {
       if (ci)
-	{
-	  if (equal_ref(sc, x, y, ci)) return(true);
-	}
+        {
+          if (equal_ref(sc, x, y, ci)) return(true);
+        }
       else nci = clear_shared_info(sc->circle_info);
     }
   for (s7_int i = 0; i < len; i++)
@@ -48274,12 +48274,12 @@ static bool vector_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_
        * (equivalent? (make-float-vector 3 1.0) (vector 1 1 1)) -> #t
        */
       if ((is_int_vector(x)) && (is_byte_vector(y)))
-	return(biv_meq(y, x));
+        return(biv_meq(y, x));
       if ((is_byte_vector(x)) && (is_int_vector(y)))
-	return(biv_meq(x, y));
+        return(biv_meq(x, y));
       for (i = 0; i < len; i++)
-	if (!is_equivalent_1(sc, vector_getter(x)(sc, x, i), vector_getter(y)(sc, y, i), NULL)) /* this could be greatly optimized */
-	  return(false);
+        if (!is_equivalent_1(sc, vector_getter(x)(sc, x, i), vector_getter(y)(sc, y, i), NULL)) /* this could be greatly optimized */
+          return(false);
       return(true);
     }
 
@@ -48288,20 +48288,20 @@ static bool vector_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_
       s7_double *arr1 = float_vector_floats(x), *arr2 = float_vector_floats(y);
       s7_double fudge = sc->equivalent_float_epsilon;
       if (fudge == 0.0)
-	{
-	  for (i = 0; i < len; i++)
-	    if ((arr1[i] != arr2[i]) &&
-		((!is_NaN(arr1[i])) || (!is_NaN(arr2[i]))))
-	      return(false);
-	}
+        {
+          for (i = 0; i < len; i++)
+            if ((arr1[i] != arr2[i]) &&
+                ((!is_NaN(arr1[i])) || (!is_NaN(arr2[i]))))
+              return(false);
+        }
       else
-	if ((len & 0x3) == 0)
-	  for (i = 0; i < len; )
-	    LOOP_4(if (!floats_are_equivalent(sc, arr1[i], arr2[i])) return(false); i++);
-	else
-	  for (i = 0; i < len; i++)
-	    if (!floats_are_equivalent(sc, arr1[i], arr2[i]))
-	      return(false);
+        if ((len & 0x3) == 0)
+          for (i = 0; i < len; )
+            LOOP_4(if (!floats_are_equivalent(sc, arr1[i], arr2[i])) return(false); i++);
+        else
+          for (i = 0; i < len; i++)
+            if (!floats_are_equivalent(sc, arr1[i], arr2[i]))
+              return(false);
       return(true);
     }
   if (is_int_vector(x))
@@ -48312,9 +48312,9 @@ static bool vector_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_
   if (!has_simple_elements(x))
     {
       if (ci)
-	{
-	  if (equal_ref(sc, x, y, ci)) return(true);
-	}
+        {
+          if (equal_ref(sc, x, y, ci)) return(true);
+        }
       else nci = clear_shared_info(sc->circle_info);
     }
   for (i = 0; i < len; i++)
@@ -48337,35 +48337,35 @@ static bool iterator_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_i
     {
     case T_STRING:
       return((is_string(y_seq)) &&
-	     (iterator_position(x) == iterator_position(y)) &&
-	     (iterator_length(x) == iterator_length(y)) &&
-	     (string_equal(sc, x_seq, y_seq, ci)));
+             (iterator_position(x) == iterator_position(y)) &&
+             (iterator_length(x) == iterator_length(y)) &&
+             (string_equal(sc, x_seq, y_seq, ci)));
 
     case T_VECTOR: case T_INT_VECTOR: case T_BYTE_VECTOR: case T_FLOAT_VECTOR:
       return((is_any_vector(y_seq)) &&
-	     (iterator_position(x) == iterator_position(y)) &&
-	     (iterator_length(x) == iterator_length(y)) &&
-	     ((equivalent) ? (vector_equivalent(sc, x_seq, y_seq, ci)) :
-	      ((is_t_vector(x_seq)) ? (vector_equal(sc, x_seq, y_seq, ci)) :
-	       ((is_float_vector(x_seq)) ? (float_vector_equal(sc, x_seq, y_seq, ci)) :
-		((is_int_vector(x_seq)) ? (int_vector_equal(sc, x_seq, y_seq, ci)) :
-		 (byte_vector_equal(sc, x_seq, y_seq, ci)))))));
+             (iterator_position(x) == iterator_position(y)) &&
+             (iterator_length(x) == iterator_length(y)) &&
+             ((equivalent) ? (vector_equivalent(sc, x_seq, y_seq, ci)) :
+              ((is_t_vector(x_seq)) ? (vector_equal(sc, x_seq, y_seq, ci)) :
+               ((is_float_vector(x_seq)) ? (float_vector_equal(sc, x_seq, y_seq, ci)) :
+                ((is_int_vector(x_seq)) ? (int_vector_equal(sc, x_seq, y_seq, ci)) :
+                 (byte_vector_equal(sc, x_seq, y_seq, ci)))))));
 
       /* iterator_next is a function (pair_iterate, iterator_finished etc) */
     case T_PAIR:
       if (iterator_next(x) != iterator_next(y)) return(false);     /* even if seqs are equal, one might be at end */
       if (equivalent)
-	{
-	  if (!pair_equivalent(sc, x_seq, y_seq, ci))
-	    return(false);
-	}
+        {
+          if (!pair_equivalent(sc, x_seq, y_seq, ci))
+            return(false);
+        }
       else
-	if (!pair_equal(sc, x_seq, y_seq, ci))
-	  return(false);
+        if (!pair_equal(sc, x_seq, y_seq, ci))
+          return(false);
 
       for (xs = x_seq, ys = y_seq; is_pair(xs) && is_pair(ys); xs = cdr(xs), ys = cdr(ys))
-	if (xs == iterator_current(x))
-	  return(ys == iterator_current(y));
+        if (xs == iterator_current(x))
+          return(ys == iterator_current(y));
       return(is_null(xs) && is_null(ys));
 
     case T_NIL:                                                    /* (make-iterator #()) works, so () should too */
@@ -48373,32 +48373,32 @@ static bool iterator_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_i
 
     case T_C_OBJECT:
       if ((is_c_object(y_seq)) &&
-	  (iterator_position(x) == iterator_position(y)) &&
-	  (iterator_length(x) == iterator_length(y)))
-	{
-	  if (equivalent)
-	    return(c_objects_are_equivalent(sc, x_seq, y_seq, ci));
-	  return(c_objects_are_equal(sc, x_seq, y_seq, ci));
-	}
+          (iterator_position(x) == iterator_position(y)) &&
+          (iterator_length(x) == iterator_length(y)))
+        {
+          if (equivalent)
+            return(c_objects_are_equivalent(sc, x_seq, y_seq, ci));
+          return(c_objects_are_equal(sc, x_seq, y_seq, ci));
+        }
       return(false);
 
     case T_LET:
       if (!is_let(y_seq)) return(false);
       if (iterator_next(x) != iterator_next(y)) return(false);
       if (x_seq == sc->rootlet)
-	return(iterator_position(x) == iterator_position(y)); /* y_seq must also be sc->rootlet since nexts are the same (rootlet_iterate) */
+        return(iterator_position(x) == iterator_position(y)); /* y_seq must also be sc->rootlet since nexts are the same (rootlet_iterate) */
       if (equivalent)
-	{
-	  if (!let_equivalent(sc, x_seq, y_seq, ci))
-	    return(false);
-	}
+        {
+          if (!let_equivalent(sc, x_seq, y_seq, ci))
+            return(false);
+        }
       else
-	if (!let_equal(sc, x_seq, y_seq, ci))
-	  return(false);
+        if (!let_equal(sc, x_seq, y_seq, ci))
+          return(false);
 
       for (xs = let_slots(x_seq), ys = let_slots(y_seq); tis_slot(xs) && tis_slot(ys); xs = next_slot(xs), ys = next_slot(ys))
-	if (xs == iterator_current_slot(x))
-	  return(ys == iterator_current_slot(y));
+        if (xs == iterator_current_slot(x))
+          return(ys == iterator_current_slot(y));
       return(is_slot_end(xs) && is_slot_end(ys));
 
     case T_HASH_TABLE:
@@ -48407,7 +48407,7 @@ static bool iterator_equal_1(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_i
       if (hash_table_entries(x_seq) == 0) return(true);
       if (iterator_position(x) != iterator_position(y)) return(false);
       if (!equivalent)
-	return(hash_table_equal(sc, x_seq, y_seq, ci));
+        return(hash_table_equal(sc, x_seq, y_seq, ci));
       return(hash_table_equivalent(sc, x_seq, y_seq, ci));
 
     case T_CLOSURE: case T_CLOSURE_STAR:
@@ -48436,7 +48436,7 @@ static bool big_ratio_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_in
     return(mpq_equal(big_ratio(x), big_ratio(y)));
   if (is_t_ratio(y))
     return((numerator(y) == mpz_get_si(mpq_numref(big_ratio(x)))) &&
-	   (denominator(y) == mpz_get_si(mpq_denref(big_ratio(x)))));
+           (denominator(y) == mpz_get_si(mpq_denref(big_ratio(x)))));
   return(false);
 }
 
@@ -48448,7 +48448,7 @@ static bool big_real_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_inf
     {
       if (mpfr_nan_p(big_real(x))) return(false);
       return((!is_NaN(real(y))) &&
-	     (mpfr_cmp_d(big_real(x), real(y)) == 0));
+             (mpfr_cmp_d(big_real(x), real(y)) == 0));
     }
   return(false);
 }
@@ -48459,13 +48459,13 @@ static bool big_complex_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_
     return(false);
   if (is_t_big_complex(y))
     return((!mpfr_nan_p(mpc_realref(big_complex(y)))) &&
-	   (!mpfr_nan_p(mpc_imagref(big_complex(y)))) &&
-	   (mpc_cmp(big_complex(x), big_complex(y)) == 0));
+           (!mpfr_nan_p(mpc_imagref(big_complex(y)))) &&
+           (mpc_cmp(big_complex(x), big_complex(y)) == 0));
   if (is_t_complex(y))
     return((!is_NaN(real_part(y))) &&
-	   (!is_NaN(imag_part(y))) &&
-	   (mpfr_cmp_d(mpc_realref(big_complex(x)), real_part(y)) == 0) &&
-	   (mpfr_cmp_d(mpc_imagref(big_complex(x)), imag_part(y)) == 0));
+           (!is_NaN(imag_part(y))) &&
+           (mpfr_cmp_d(mpc_realref(big_complex(x)), real_part(y)) == 0) &&
+           (mpfr_cmp_d(mpc_imagref(big_complex(x)), imag_part(y)) == 0));
   return(false);
 }
 #endif
@@ -48486,11 +48486,11 @@ static bool fraction_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_inf
 {
   if (is_t_ratio(y))
     return((numerator(x) == numerator(y)) &&
-	   (denominator(x) == denominator(y)));
+           (denominator(x) == denominator(y)));
 #if WITH_GMP
   if (is_t_big_ratio(y))
     return((numerator(x) == mpz_get_si(mpq_numref(big_ratio(y)))) &&
-	   (denominator(x) == mpz_get_si(mpq_denref(big_ratio(y)))));
+           (denominator(x) == mpz_get_si(mpq_denref(big_ratio(y)))));
 #endif
   return(false);
 }
@@ -48502,8 +48502,8 @@ static bool real_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info_t
 #if WITH_GMP
   if (is_t_big_real(y))
     return((!is_NaN(real(x))) &&
-	   (!mpfr_nan_p(big_real(y))) &&
-	   (mpfr_cmp_d(big_real(y), real(x)) == 0));
+           (!mpfr_nan_p(big_real(y))) &&
+           (mpfr_cmp_d(big_real(y), real(x)) == 0));
 #endif
   return(false);
 }
@@ -48516,10 +48516,10 @@ static bool complex_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_info
   if (is_t_big_complex(y))
     {
       if ((is_NaN(real_part(x))) || (is_NaN(imag_part(x))) ||
-	  (mpfr_nan_p(mpc_realref(big_complex(y)))) || (mpfr_nan_p(mpc_imagref(big_complex(y)))))
-	return(false);
+          (mpfr_nan_p(mpc_realref(big_complex(y)))) || (mpfr_nan_p(mpc_imagref(big_complex(y)))))
+        return(false);
       return((mpfr_cmp_d(mpc_realref(big_complex(y)), real_part(x)) == 0) &&
-	     (mpfr_cmp_d(mpc_imagref(big_complex(y)), imag_part(x)) == 0));
+             (mpfr_cmp_d(mpc_imagref(big_complex(y)), imag_part(x)) == 0));
     }
 #endif
   return(false);
@@ -48536,7 +48536,7 @@ static bool big_integer_or_ratio_equivalent(s7_scheme *sc, s7_pointer x, s7_poin
     {
     case T_INTEGER:
       if (int_case)
-	return(mpz_cmp_si(big_integer(x), integer(y)) == 0);
+        return(mpz_cmp_si(big_integer(x), integer(y)) == 0);
       mpfr_set_si(sc->mpfr_2, integer(y), MPFR_RNDN);
       return(big_floats_are_equivalent(sc, sc->mpfr_1, sc->mpfr_2));
     case T_RATIO:
@@ -48548,14 +48548,14 @@ static bool big_integer_or_ratio_equivalent(s7_scheme *sc, s7_pointer x, s7_poin
     case T_COMPLEX:
       mpfr_set_d(sc->mpfr_2, real_part(y), MPFR_RNDN);
       if (!big_floats_are_equivalent(sc, sc->mpfr_1, sc->mpfr_2))
-	return(false);
+        return(false);
       if (is_NaN(imag_part(y))) return(false);
       mpfr_set_d(sc->mpfr_1, sc->equivalent_float_epsilon, MPFR_RNDN);
       mpfr_set_d(sc->mpfr_2, imag_part(y), MPFR_RNDN);
       return(mpfr_cmpabs(sc->mpfr_2, sc->mpfr_1) <= 0);
     case T_BIG_INTEGER:
       if (int_case)
-	return(mpz_cmp(big_integer(x), big_integer(y)) == 0);
+        return(mpz_cmp(big_integer(x), big_integer(y)) == 0);
       mpfr_set_z(sc->mpfr_2, big_integer(y), MPFR_RNDN);
       return(big_floats_are_equivalent(sc, sc->mpfr_1, sc->mpfr_2));
     case T_BIG_RATIO:
@@ -48565,11 +48565,11 @@ static bool big_integer_or_ratio_equivalent(s7_scheme *sc, s7_pointer x, s7_poin
       return(big_floats_are_equivalent(sc, sc->mpfr_1, big_real(y)));
     case T_BIG_COMPLEX:
       if (big_floats_are_equivalent(sc, sc->mpfr_1, mpc_realref(big_complex(y))))
-	{
-	  if (mpfr_nan_p(mpc_imagref(big_complex(y)))) return(false);
-	  mpfr_set_d(sc->mpfr_1, sc->equivalent_float_epsilon, MPFR_RNDN);
-	  return(mpfr_cmpabs(mpc_imagref(big_complex(y)), sc->mpfr_1) <= 0);
-	}}
+        {
+          if (mpfr_nan_p(mpc_imagref(big_complex(y)))) return(false);
+          mpfr_set_d(sc->mpfr_1, sc->equivalent_float_epsilon, MPFR_RNDN);
+          return(mpfr_cmpabs(mpc_imagref(big_complex(y)), sc->mpfr_1) <= 0);
+        }}
   return(false);
 }
 
@@ -48600,7 +48600,7 @@ static bool big_real_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, share
     case T_COMPLEX:
       mpfr_set_d(sc->mpfr_2, real_part(y), MPFR_RNDN);
       if (!big_floats_are_equivalent(sc, big_real(x), sc->mpfr_2))
-	return(false);
+        return(false);
       if (is_NaN(imag_part(y))) return(false);
       mpfr_set_d(sc->mpfr_1, sc->equivalent_float_epsilon, MPFR_RNDN);
       mpfr_set_d(sc->mpfr_2, imag_part(y), MPFR_RNDN);
@@ -48615,11 +48615,11 @@ static bool big_real_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, share
       return(big_floats_are_equivalent(sc, big_real(x), big_real(y)));
     case T_BIG_COMPLEX:
       if (big_floats_are_equivalent(sc, big_real(x), mpc_realref(big_complex(y))))
-	{
-	  if (mpfr_nan_p(mpc_imagref(big_complex(y)))) return(false);
-	  mpfr_set_d(sc->mpfr_1, sc->equivalent_float_epsilon, MPFR_RNDN);
-	  return(mpfr_cmpabs(mpc_imagref(big_complex(y)), sc->mpfr_1) <= 0);
-	}}
+        {
+          if (mpfr_nan_p(mpc_imagref(big_complex(y)))) return(false);
+          mpfr_set_d(sc->mpfr_1, sc->equivalent_float_epsilon, MPFR_RNDN);
+          return(mpfr_cmpabs(mpc_imagref(big_complex(y)), sc->mpfr_1) <= 0);
+        }}
   return(false);
 }
 
@@ -48631,34 +48631,34 @@ static bool big_complex_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, sh
     case T_INTEGER:
       mpfr_set_si(sc->mpfr_2, integer(y), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), sc->mpfr_2)) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
     case T_RATIO:
       mpfr_set_d(sc->mpfr_2, fraction(y), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), sc->mpfr_2)) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
     case T_REAL:
       mpfr_set_d(sc->mpfr_2, real(y), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), sc->mpfr_2)) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
     case T_COMPLEX:
       mpfr_set_d(sc->mpfr_1, imag_part(y), MPFR_RNDN);
       mpfr_set_d(sc->mpfr_2, real_part(y), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), sc->mpfr_2)) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
     case T_BIG_INTEGER:
       mpfr_set_z(sc->mpfr_2, big_integer(y), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), sc->mpfr_2)) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
     case T_BIG_RATIO:
       mpfr_set_q(sc->mpfr_2, big_ratio(y), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), sc->mpfr_2)) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
     case T_BIG_REAL:
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), big_real(y))) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), sc->mpfr_1)));
     case T_BIG_COMPLEX:
       return((big_floats_are_equivalent(sc, mpc_realref(big_complex(x)), mpc_realref(big_complex(y)))) &&
-	     (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), mpc_imagref(big_complex(y)))));
+             (big_floats_are_equivalent(sc, mpc_imagref(big_complex(x)), mpc_imagref(big_complex(y)))));
     }
   return(false);
 }
@@ -48685,7 +48685,7 @@ static bool integer_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
       return(floats_are_equivalent(sc, (double)integer(x), real(y)));
     case T_COMPLEX:
       return((fabs(imag_part(y)) <= sc->equivalent_float_epsilon) &&
-	     (floats_are_equivalent(sc, (double)integer(x), real_part(y))));
+             (floats_are_equivalent(sc, (double)integer(x), real_part(y))));
 #if WITH_GMP
     case T_BIG_INTEGER:
       return(mpz_cmp_si(big_integer(y), integer(x)) == 0);
@@ -48716,7 +48716,7 @@ static bool fraction_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, share
       return(floats_are_equivalent(sc, (double)fraction(x), real(y)));
     case T_COMPLEX:
       return((fabs(imag_part(y)) <= sc->equivalent_float_epsilon) &&
-	     (floats_are_equivalent(sc, fraction(x), real_part(y))));
+             (floats_are_equivalent(sc, fraction(x), real_part(y))));
 #if WITH_GMP
     case T_BIG_INTEGER:
       mpfr_set_z(sc->mpfr_1, big_integer(y), MPFR_RNDN);
@@ -48749,7 +48749,7 @@ static bool real_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared_in
       return(floats_are_equivalent(sc, real(x), real(y)));
     case T_COMPLEX:
       return((fabs(imag_part(y)) <= sc->equivalent_float_epsilon) &&
-	     (floats_are_equivalent(sc, real(x), real_part(y))));
+             (floats_are_equivalent(sc, real(x), real_part(y))));
 #if WITH_GMP
     case T_BIG_INTEGER:
       mpfr_set_z(sc->mpfr_1, big_integer(y), MPFR_RNDN);
@@ -48776,36 +48776,36 @@ static bool complex_equivalent(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
     {
     case T_INTEGER:
       return((floats_are_equivalent(sc, real_part(x), integer(y))) &&
-	     (floats_are_equivalent(sc, imag_part(x), 0.0)));
+             (floats_are_equivalent(sc, imag_part(x), 0.0)));
     case T_RATIO:
       return((floats_are_equivalent(sc, real_part(x), fraction(y))) &&
-	     (floats_are_equivalent(sc, imag_part(x), 0.0)));
+             (floats_are_equivalent(sc, imag_part(x), 0.0)));
     case T_REAL:
       return((floats_are_equivalent(sc, real_part(x), real(y))) &&
-	     (floats_are_equivalent(sc, imag_part(x), 0.0)));
+             (floats_are_equivalent(sc, imag_part(x), 0.0)));
     case T_COMPLEX:
       return((floats_are_equivalent(sc, real_part(x), real_part(y))) &&
-	     (floats_are_equivalent(sc, imag_part(x), imag_part(y))));
+             (floats_are_equivalent(sc, imag_part(x), imag_part(y))));
 #if WITH_GMP
     case T_BIG_INTEGER:
       mpfr_set_z(sc->mpfr_1, big_integer(y), MPFR_RNDN);
       mpfr_set_d(sc->mpfr_2, real_part(x), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, sc->mpfr_1, sc->mpfr_2)) &&
-	     (floats_are_equivalent(sc, imag_part(x), 0.0)));
+             (floats_are_equivalent(sc, imag_part(x), 0.0)));
     case T_BIG_RATIO:
       mpfr_set_d(sc->mpfr_1, real_part(x), MPFR_RNDN);
       mpfr_set_q(sc->mpfr_2, big_ratio(y), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, sc->mpfr_1, sc->mpfr_2)) &&
-	     (floats_are_equivalent(sc, imag_part(x), 0.0)));
+             (floats_are_equivalent(sc, imag_part(x), 0.0)));
     case T_BIG_REAL:
       mpfr_set_d(sc->mpfr_1, real_part(x), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, sc->mpfr_1, big_real(y))) &&
-	     (floats_are_equivalent(sc, imag_part(x), 0.0)));
+             (floats_are_equivalent(sc, imag_part(x), 0.0)));
     case T_BIG_COMPLEX:
       mpfr_set_d(sc->mpfr_1, real_part(x), MPFR_RNDN);
       mpfr_set_d(sc->mpfr_2, imag_part(x), MPFR_RNDN);
       return((big_floats_are_equivalent(sc, sc->mpfr_1, mpc_realref(big_complex(y)))) &&
-	     (big_floats_are_equivalent(sc, sc->mpfr_2, mpc_imagref(big_complex(y)))));
+             (big_floats_are_equivalent(sc, sc->mpfr_2, mpc_imagref(big_complex(y)))));
 #endif
     }
   return(false);
@@ -48817,9 +48817,9 @@ static bool random_state_equal(s7_scheme *sc, s7_pointer x, s7_pointer y, shared
   return(x == y);
 #else
   return((x == y) ||
-	 ((is_random_state(y)) &&
-	  (random_seed(x) == random_seed(y)) &&
-	  (random_carry(x) == random_carry(y))));
+         ((is_random_state(y)) &&
+          (random_seed(x) == random_seed(y)) &&
+          (random_carry(x) == random_carry(y))));
 #endif
 }
 
@@ -48931,7 +48931,7 @@ static s7_pointer pair_length(s7_scheme *sc, s7_pointer a)
     {
       LOOP_4(fast = cdr(fast); i++; if (!is_pair(fast)) return(make_integer(sc, (is_null(fast)) ? i : -i)));
       slow = cdr(slow);
-      if (fast == slow)	return(real_infinity);
+      if (fast == slow)        return(real_infinity);
     }
   return(real_infinity);
 }
@@ -49065,15 +49065,15 @@ static s7_pointer let_setter(s7_scheme *sc, s7_pointer e, s7_int loc, s7_pointer
     {
       s7_pointer sym = car(val);
       if (is_symbol(sym))
-	{
-	  s7_pointer slot;
-	  if (is_keyword(sym)) sym = keyword_symbol(sym); /* else make_slot will mark the keyword as local confusing odd_bits etc */
-	  slot = slot_in_let(sc, e, sym);
-	  if (is_slot(slot))
-	    checked_slot_set_value(sc, slot, cdr(val));
-	  else add_slot_checked_with_id(sc, e, sym, cdr(val));
-	  return(cdr(val));
-	}}
+        {
+          s7_pointer slot;
+          if (is_keyword(sym)) sym = keyword_symbol(sym); /* else make_slot will mark the keyword as local confusing odd_bits etc */
+          slot = slot_in_let(sc, e, sym);
+          if (is_slot(slot))
+            checked_slot_set_value(sc, slot, cdr(val));
+          else add_slot_checked_with_id(sc, e, sym, cdr(val));
+          return(cdr(val));
+        }}
   set_car(sc->elist_3, wrap_string(sc, "~S: ~S is not (cons symbol value)", 33));
   set_caddr(sc->elist_3, val);
   error_nr(sc, sc->wrong_type_arg_symbol, sc->elist_3);
@@ -49227,12 +49227,12 @@ static s7_pointer copy_c_object_to_same_type(s7_scheme *sc, s7_pointer dest, s7_
       set_car(sc->t3_1, dest);
       set_car(sc->t3_2, mj);
       for (s7_int i = source_start, j = dest_start; i < dest_end; i++, j++)
-	{
-	  set_integer(mi, i);
-	  set_car(sc->t3_3, cref(sc, with_list_t2(source, mi)));
-	  set_integer(mj, j);
-	  cset(sc, sc->t3_1);
-	}}
+        {
+          set_integer(mi, i);
+          set_car(sc->t3_3, cref(sc, with_list_t2(source, mi)));
+          set_integer(mj, j);
+          cset(sc, sc->t3_1);
+        }}
   else
     {
       s7_pointer mi = make_mutable_integer(sc, 0);
@@ -49240,14 +49240,14 @@ static s7_pointer copy_c_object_to_same_type(s7_scheme *sc, s7_pointer dest, s7_
       s7_pointer mj = make_mutable_integer(sc, 0);
       s7_int gc_loc2 = gc_protect_1(sc, mj);
       for (s7_int i = source_start, j = dest_start; i < dest_end; i++, j++)
-	{
-	  set_integer(mi, i);
-	  set_car(sc->t3_3, cref(sc, with_list_t2(source, mi)));
-	  set_car(sc->t3_1, dest);
-	  set_car(sc->t3_2, mj);
-	  set_integer(mj, j);
-	  cset(sc, sc->t3_1);
-	}
+        {
+          set_integer(mi, i);
+          set_car(sc->t3_3, cref(sc, with_list_t2(source, mi)));
+          set_car(sc->t3_1, dest);
+          set_car(sc->t3_2, mj);
+          set_integer(mj, j);
+          cset(sc, sc->t3_1);
+        }
       s7_gc_unprotect_at(sc, gc_loc1);
       s7_gc_unprotect_at(sc, gc_loc2);
       free_cell(sc, mi);
@@ -49264,24 +49264,24 @@ static s7_pointer copy_to_same_type(s7_scheme *sc, s7_pointer dest, s7_pointer s
     {
     case T_PAIR:
       {
-	s7_pointer pd = dest, ps = source;
-	s7_int i;
-	for (i = 0; i < source_start; i++)
-	  ps = cdr(ps);
-	for (i = 0; i < dest_start; i++)
-	  pd = cdr(pd);
-	for (; (i < dest_end) && is_pair(ps) && is_pair(pd); i++, ps = cdr(ps), pd = cdr(pd))
-	  set_car(pd, car(ps));
-	return(dest);
+        s7_pointer pd = dest, ps = source;
+        s7_int i;
+        for (i = 0; i < source_start; i++)
+          ps = cdr(ps);
+        for (i = 0; i < dest_start; i++)
+          pd = cdr(pd);
+        for (; (i < dest_end) && is_pair(ps) && is_pair(pd); i++, ps = cdr(ps), pd = cdr(pd))
+          set_car(pd, car(ps));
+        return(dest);
       }
 
     case T_VECTOR:
       if (is_typed_vector(dest))
-	{
-	  s7_pointer *els = vector_elements(source);
-	  for (s7_int i = source_start, j = dest_start; j < dest_end; i++, j++)
-	    typed_vector_setter(sc, dest, j, els[i]);                     /* types are equal, so source is a normal vector */
-	}
+        {
+          s7_pointer *els = vector_elements(source);
+          for (s7_int i = source_start, j = dest_start; j < dest_end; i++, j++)
+            typed_vector_setter(sc, dest, j, els[i]);                     /* types are equal, so source is a normal vector */
+        }
       else memcpy((void *)((vector_elements(dest)) + dest_start), (void *)((vector_elements(source)) + source_start), source_len * sizeof(s7_pointer));
       return(dest);
 
@@ -49293,13 +49293,13 @@ static s7_pointer copy_to_same_type(s7_scheme *sc, s7_pointer dest, s7_pointer s
       return(dest);
     case T_BYTE_VECTOR:
       if (is_string(dest))
-	memcpy((void *)(string_value(dest) + dest_start), (void *)((byte_vector_bytes(source)) + source_start), source_len * sizeof(uint8_t));
+        memcpy((void *)(string_value(dest) + dest_start), (void *)((byte_vector_bytes(source)) + source_start), source_len * sizeof(uint8_t));
       else memcpy((void *)(byte_vector_bytes(dest) + dest_start), (void *)((byte_vector_bytes(source)) + source_start), source_len * sizeof(uint8_t));
       return(dest);
 
     case T_STRING:
       if (is_string(dest))
-	memcpy((void *)(string_value(dest) + dest_start), (void *)((string_value(source)) + source_start), source_len);
+        memcpy((void *)(string_value(dest) + dest_start), (void *)((string_value(source)) + source_start), source_len);
       else memcpy((void *)(byte_vector_bytes(dest) + dest_start), (void *)((string_value(source)) + source_start), source_len);
       return(dest);
 
@@ -49318,21 +49318,21 @@ static s7_pointer copy_to_same_type(s7_scheme *sc, s7_pointer dest, s7_pointer s
 
     case T_HASH_TABLE:
       {
-	s7_pointer p;
-	gc_protect_via_stack(sc, source);
-	p = hash_table_copy(sc, source, dest, source_start, source_start + source_len);
-	unstack_gc_protect(sc);
-	if ((hash_table_checker(source) != hash_table_checker(dest)) &&
-	    (hash_table_mapper(dest) == default_hash_map))
-	  {
-	    if (hash_table_checker(dest) == hash_empty)
-	      hash_table_checker(dest) = hash_table_checker(source); /* copy hash_table_procedures also? what about the mapper? see hash_table_copy */
-	    else
-	      {
-		hash_table_checker(dest) = hash_equal;
-		hash_set_chosen(dest);
-	      }}
-	return(p);
+        s7_pointer p;
+        gc_protect_via_stack(sc, source);
+        p = hash_table_copy(sc, source, dest, source_start, source_start + source_len);
+        unstack_gc_protect(sc);
+        if ((hash_table_checker(source) != hash_table_checker(dest)) &&
+            (hash_table_mapper(dest) == default_hash_map))
+          {
+            if (hash_table_checker(dest) == hash_empty)
+              hash_table_checker(dest) = hash_table_checker(source); /* copy hash_table_procedures also? what about the mapper? see hash_table_copy */
+            else
+              {
+                hash_table_checker(dest) = hash_equal;
+                hash_set_chosen(dest);
+              }}
+        return(p);
       }
 
     default:
@@ -49344,14 +49344,14 @@ static s7_pointer copy_to_same_type(s7_scheme *sc, s7_pointer dest, s7_pointer s
 static noreturn void copy_element_error_nr(s7_scheme *sc, s7_pointer caller, s7_int num, s7_pointer element, int32_t desired_type)
 {
   set_elist_6(sc, wrap_string(sc, "~A ~:D element, ~S, is ~A but should be ~A", 42),
-	      caller, wrap_integer(sc, num), element, type_name_string(sc, element), sc->type_names[desired_type]);
+              caller, wrap_integer(sc, num), element, type_name_string(sc, element), sc->type_names[desired_type]);
   error_nr(sc, sc->wrong_type_arg_symbol, sc->elist_6);
 }
 
 static noreturn void copy_element_error_with_type_nr(s7_scheme *sc, s7_pointer caller, s7_int num, s7_pointer element, s7_pointer desired_type)
 {
   set_elist_6(sc, wrap_string(sc, "~A ~:D element, ~S, is ~A but should be ~A", 42),
-	      caller, wrap_integer(sc, num), element, type_name_string(sc, element), desired_type);
+              caller, wrap_integer(sc, num), element, type_name_string(sc, element), desired_type);
   error_nr(sc, sc->wrong_type_arg_symbol, sc->elist_6);
 }
 
@@ -49376,7 +49376,7 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
   dest = T_Ext(cadr(args));
   if ((dest == sc->readable_keyword) && (!is_pair(source)))
     error_nr(sc, sc->out_of_range_symbol,
-	     set_elist_1(sc, wrap_string(sc, "copy argument 2, :readable, only works if the source is a pair", 62)));
+             set_elist_1(sc, wrap_string(sc, "copy argument 2, :readable, only works if the source is a pair", 62)));
 
   if ((is_immutable(dest)) &&
       (dest != sc->readable_keyword) &&
@@ -49394,17 +49394,17 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
     {
     case T_PAIR:
       if (dest == sc->readable_keyword)  /* a kludge, but I can't think of anything less stupid */
-	{
-	  if (have_indices)              /* it seems to me that the start/end args here don't make any sense so... */
-	    error_nr(sc, sc->wrong_number_of_args_symbol,
-		     set_elist_3(sc, wrap_string(sc, "~S: start/end indices make no sense with :readable: ~S", 54), caller, args));
-	  return(copy_body(sc, source));
-	}
+        {
+          if (have_indices)              /* it seems to me that the start/end args here don't make any sense so... */
+            error_nr(sc, sc->wrong_number_of_args_symbol,
+                     set_elist_3(sc, wrap_string(sc, "~S: start/end indices make no sense with :readable: ~S", 54), caller, args));
+          return(copy_body(sc, source));
+        }
       end = s7_list_length(sc, source);
       if (end == 0)
-	end = circular_list_entries(source);
+        end = circular_list_entries(source);
       else
-	if (end < 0) end = -end;
+        if (end < 0) end = -end;
       break;
 
     case T_INT_VECTOR:  case T_FLOAT_VECTOR: case T_VECTOR: case T_BYTE_VECTOR:
@@ -49429,10 +49429,10 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
 
     case T_C_OBJECT:
       if (c_object_copy(sc, source))
-	{
-	  s7_pointer x = (*(c_object_copy(sc, source)))(sc, args);
-	  if (x == dest) return(dest); /* this can happen (s7test block_copy) */
-	}
+        {
+          s7_pointer x = (*(c_object_copy(sc, source)))(sc, args);
+          if (x == dest) return(dest); /* this can happen (s7test block_copy) */
+        }
       check_method(sc, source, sc->copy_symbol, args);
       get = c_object_getter;
       end = c_object_length_to_int(sc, source);
@@ -49442,36 +49442,36 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
       if (source == dest) return(dest);
       check_method(sc, source, sc->copy_symbol, args);
       if (source == sc->rootlet)
-	wrong_type_error_nr(sc, caller, 1, source, wrap_string(sc, "a sequence other than the rootlet", 33));
+        wrong_type_error_nr(sc, caller, 1, source, wrap_string(sc, "a sequence other than the rootlet", 33));
       if ((!have_indices) && (is_let(dest)) && (dest != sc->s7_starlet))
-	{
-	  s7_pointer slot;
-	  if (dest == sc->rootlet) /* (copy (inlet 'a 1) (rootlet)) */
-	    for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
-	      s7_make_slot(sc, dest, slot_symbol(slot), slot_value(slot));
-	  else
-	    if ((has_let_fallback(source)) &&
-		(has_let_fallback(dest)))
-	      {
-		for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
-		  if ((slot_symbol(slot) != sc->let_ref_fallback_symbol) &&
-		      (slot_symbol(slot) != sc->let_set_fallback_symbol))
-		    add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
-	      }
-	    else
-	      /* this copies reversing the order -- if shadowing, this unshadows, tmp has in-order copy code, but it's too much effort */
-	      /*   it also ignores possible slot setters */
-	      for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
-		add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
-	  return(dest);
-	}
+        {
+          s7_pointer slot;
+          if (dest == sc->rootlet) /* (copy (inlet 'a 1) (rootlet)) */
+            for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
+              s7_make_slot(sc, dest, slot_symbol(slot), slot_value(slot));
+          else
+            if ((has_let_fallback(source)) &&
+                (has_let_fallback(dest)))
+              {
+                for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
+                  if ((slot_symbol(slot) != sc->let_ref_fallback_symbol) &&
+                      (slot_symbol(slot) != sc->let_set_fallback_symbol))
+                    add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
+              }
+            else
+              /* this copies reversing the order -- if shadowing, this unshadows, tmp has in-order copy code, but it's too much effort */
+              /*   it also ignores possible slot setters */
+              for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
+                add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
+          return(dest);
+        }
       end = let_length(sc, source);
       break;
 
     case T_NIL:
       end = 0;
       if (is_sequence(dest))
-	break;
+        break;
 
     default:
       error_nr(sc, sc->wrong_type_arg_symbol, set_elist_4(sc, wrap_string(sc, "can't ~S ~S to ~S", 17), caller, source, dest));
@@ -49490,7 +49490,7 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
   if (source_len == 0)
     {
       if (!is_sequence(dest))
-	wrong_type_error_nr(sc, caller, 2, dest, a_sequence_string);
+        wrong_type_error_nr(sc, caller, 2, dest, a_sequence_string);
       return(dest);
     }
 
@@ -49503,8 +49503,8 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
     case T_INT_VECTOR:
     case T_BYTE_VECTOR:
       if (is_float_vector(source))
-	error_nr(sc, sc->wrong_type_arg_symbol,
-		 set_elist_4(sc, wrap_string(sc, "can't ~S ~S to ~A", 17), caller, source, sc->type_names[type(dest)]));
+        error_nr(sc, sc->wrong_type_arg_symbol,
+                 set_elist_4(sc, wrap_string(sc, "can't ~S ~S to ~A", 17), caller, source, sc->type_names[type(dest)]));
     case T_FLOAT_VECTOR:
       set = vector_setter(dest);
       dest_len = vector_length(dest);
@@ -49530,20 +49530,20 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
     case T_C_OBJECT:
       /* if source or dest is c_object, call its copy function before falling back on the get/set functions */
       if (c_object_copy(sc, dest))
-	{
-	  s7_pointer x = (*(c_object_copy(sc, dest)))(sc, args);
-	  if (x == dest)
-	    return(dest);
-	}
+        {
+          s7_pointer x = (*(c_object_copy(sc, dest)))(sc, args);
+          if (x == dest)
+            return(dest);
+        }
       set = c_object_setter;
       dest_len = c_object_length_to_int(sc, dest);
       break;
 
     case T_LET:
       if (dest == sc->rootlet)
-	wrong_type_error_nr(sc, caller, 2, dest, wrap_string(sc, "a sequence other rootlet", 24));
+        wrong_type_error_nr(sc, caller, 2, dest, wrap_string(sc, "a sequence other rootlet", 24));
       if (dest == sc->s7_starlet)
-	wrong_type_error_nr(sc, caller, 2, dest, wrap_string(sc, "a sequence other than *s7*", 26));
+        wrong_type_error_nr(sc, caller, 2, dest, wrap_string(sc, "a sequence other than *s7*", 26));
       set = let_setter;
       dest_len = source_len;          /* grows via set, so dest_len isn't relevant */
       set_cadr(sc->elist_3, caller);  /* for possible error handling in let_setter */
@@ -49574,7 +49574,7 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
   if ((source != dest) &&
       ((type(source) == type(dest)) ||
        ((is_string_or_byte_vector(source)) &&
-	(is_string_or_byte_vector(dest)))))
+        (is_string_or_byte_vector(dest)))))
     {
       s7_pointer res = copy_to_same_type(sc, dest, source, 0, source_len, start);
       if (res) return(res);
@@ -49584,316 +49584,316 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
     {
     case T_PAIR:
       {
-	s7_pointer p = source;
-	i = 0;
-	if (start > 0)
-	  for (i = 0; i < start; i++)
-	    p = cdr(p);
-	/* dest won't be a pair here if source != dest -- the pair->pair case was caught above */
-	if (source == dest) /* here start != 0 (see above) */
-	  for (s7_pointer dp = source /* i = start */; i < end; i++, p = cdr(p), dp = cdr(dp))
-	    set_car(dp, car(p));
-	else
-	  if (is_string(dest))
-	    {
-	      char *dst = string_value(dest);
-	      for (/* i = start */ j = 0; i < end; i++, j++, p = cdr(p))
-		{
-		  if (!is_character(car(p)))
-		    copy_element_error_nr(sc, caller, i + 1, car(p), T_CHARACTER);
-		  dst[j] = character(car(p));
-		}}
-	  else
-	    if ((is_t_vector(dest)) && (set != typed_vector_setter))
-	      {
-		s7_pointer *els = vector_elements(dest);
-		for (/* i = start */ j = 0; i < end; i++, j++, p = cdr(p))
-		  els[j] = car(p);
-	      }
-	    else
-	      for (/* i = start */ j = 0; i < end; i++, j++, p = cdr(p))
-		set(sc, dest, j, car(p));
-	return(dest);
+        s7_pointer p = source;
+        i = 0;
+        if (start > 0)
+          for (i = 0; i < start; i++)
+            p = cdr(p);
+        /* dest won't be a pair here if source != dest -- the pair->pair case was caught above */
+        if (source == dest) /* here start != 0 (see above) */
+          for (s7_pointer dp = source /* i = start */; i < end; i++, p = cdr(p), dp = cdr(dp))
+            set_car(dp, car(p));
+        else
+          if (is_string(dest))
+            {
+              char *dst = string_value(dest);
+              for (/* i = start */ j = 0; i < end; i++, j++, p = cdr(p))
+                {
+                  if (!is_character(car(p)))
+                    copy_element_error_nr(sc, caller, i + 1, car(p), T_CHARACTER);
+                  dst[j] = character(car(p));
+                }}
+          else
+            if ((is_t_vector(dest)) && (set != typed_vector_setter))
+              {
+                s7_pointer *els = vector_elements(dest);
+                for (/* i = start */ j = 0; i < end; i++, j++, p = cdr(p))
+                  els[j] = car(p);
+              }
+            else
+              for (/* i = start */ j = 0; i < end; i++, j++, p = cdr(p))
+                set(sc, dest, j, car(p));
+        return(dest);
       }
 
     case T_LET:
       if (source == sc->s7_starlet) /* *s7* */
-	{
-	  s7_pointer iter = s7_make_iterator(sc, sc->s7_starlet);
-	  s7_int gc_loc = gc_protect_1(sc, iter);
-	  for (i = 0; i < start; i++)
-	    {
-	      s7_iterate(sc, iter);
-	      if (iterator_is_at_end(iter))
-		{
-		  s7_gc_unprotect_at(sc, gc_loc);
-		  return(dest);
-		}}
-	  if (is_pair(dest)) /* (append '(1) *s7* ()) */
-	    {
-	      s7_pointer p;
-	      for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
-		{
-		  s7_pointer val = s7_iterate(sc, iter);
-		  if (iterator_is_at_end(iter)) break;
-		  set_car(p, val);
-		}}
-	  else
-	    for (i = start, j = 0; i < end; i++, j++)
-	      {
-		s7_pointer val = s7_iterate(sc, iter);
-		if (iterator_is_at_end(iter)) break;
-		set(sc, dest, j, val);
-	      }
-	  s7_gc_unprotect_at(sc, gc_loc);
-	}
+        {
+          s7_pointer iter = s7_make_iterator(sc, sc->s7_starlet);
+          s7_int gc_loc = gc_protect_1(sc, iter);
+          for (i = 0; i < start; i++)
+            {
+              s7_iterate(sc, iter);
+              if (iterator_is_at_end(iter))
+                {
+                  s7_gc_unprotect_at(sc, gc_loc);
+                  return(dest);
+                }}
+          if (is_pair(dest)) /* (append '(1) *s7* ()) */
+            {
+              s7_pointer p;
+              for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
+                {
+                  s7_pointer val = s7_iterate(sc, iter);
+                  if (iterator_is_at_end(iter)) break;
+                  set_car(p, val);
+                }}
+          else
+            for (i = start, j = 0; i < end; i++, j++)
+              {
+                s7_pointer val = s7_iterate(sc, iter);
+                if (iterator_is_at_end(iter)) break;
+                set(sc, dest, j, val);
+              }
+          s7_gc_unprotect_at(sc, gc_loc);
+        }
       else
-	{
-	  /* source and dest can't be rootlet (checked above), dest also can't be *s7* */
-	  s7_pointer slot = let_slots(source);
-	  for (i = 0; i < start; i++) slot = next_slot(slot);
-	  if (is_pair(dest))
-	    {
-	      s7_pointer p;
-	      check_free_heap_size(sc, end - start);
-	      for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p), slot = next_slot(slot))
-		set_car(p, cons_unchecked(sc, slot_symbol(slot), slot_value(slot)));
-	    }
-	  else
-	    if (is_let(dest)) /* this ignores slot setters */
-	      {
-		if ((has_let_fallback(source)) &&
-		    (has_let_fallback(dest)))
-		  {
-		    for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
-		      if ((slot_symbol(slot) != sc->let_ref_fallback_symbol) &&
-			  (slot_symbol(slot) != sc->let_set_fallback_symbol))
-			add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
-		  }
-		else
-		  for (i = start; i < end; i++, slot = next_slot(slot))
-		    add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
-	      }
-	    else
-	      if (is_hash_table(dest))
-		for (i = start; i < end; i++, slot = next_slot(slot))
-		  s7_hash_table_set(sc, dest, slot_symbol(slot), slot_value(slot)); /* if value=#f, dest will not contain symbol */
-	      else
-		if ((is_t_vector(dest)) && (set != typed_vector_setter))
-		  {
-		    s7_pointer *els = vector_elements(dest);
-		    check_free_heap_size(sc, end - start);
-		    for (i = start, j = 0; i < end; i++, j++, slot = next_slot(slot))
-		      els[j] = cons_unchecked(sc, slot_symbol(slot), slot_value(slot));
-		  }
-		else
-		  for (i = start, j = 0; i < end; i++, j++, slot = next_slot(slot))
-		    set(sc, dest, j, cons(sc, slot_symbol(slot), slot_value(slot)));
-	}
+        {
+          /* source and dest can't be rootlet (checked above), dest also can't be *s7* */
+          s7_pointer slot = let_slots(source);
+          for (i = 0; i < start; i++) slot = next_slot(slot);
+          if (is_pair(dest))
+            {
+              s7_pointer p;
+              check_free_heap_size(sc, end - start);
+              for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p), slot = next_slot(slot))
+                set_car(p, cons_unchecked(sc, slot_symbol(slot), slot_value(slot)));
+            }
+          else
+            if (is_let(dest)) /* this ignores slot setters */
+              {
+                if ((has_let_fallback(source)) &&
+                    (has_let_fallback(dest)))
+                  {
+                    for (slot = let_slots(source); tis_slot(slot); slot = next_slot(slot))
+                      if ((slot_symbol(slot) != sc->let_ref_fallback_symbol) &&
+                          (slot_symbol(slot) != sc->let_set_fallback_symbol))
+                        add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
+                  }
+                else
+                  for (i = start; i < end; i++, slot = next_slot(slot))
+                    add_slot_checked_with_id(sc, dest, slot_symbol(slot), slot_value(slot));
+              }
+            else
+              if (is_hash_table(dest))
+                for (i = start; i < end; i++, slot = next_slot(slot))
+                  s7_hash_table_set(sc, dest, slot_symbol(slot), slot_value(slot)); /* if value=#f, dest will not contain symbol */
+              else
+                if ((is_t_vector(dest)) && (set != typed_vector_setter))
+                  {
+                    s7_pointer *els = vector_elements(dest);
+                    check_free_heap_size(sc, end - start);
+                    for (i = start, j = 0; i < end; i++, j++, slot = next_slot(slot))
+                      els[j] = cons_unchecked(sc, slot_symbol(slot), slot_value(slot));
+                  }
+                else
+                  for (i = start, j = 0; i < end; i++, j++, slot = next_slot(slot))
+                    set(sc, dest, j, cons(sc, slot_symbol(slot), slot_value(slot)));
+        }
       return(dest);
 
     case T_HASH_TABLE:
       {
-	s7_int loc = -1, skip = start;
-	hash_entry_t **elements = hash_table_elements(source);
-	hash_entry_t *x = NULL;
-
-	while (skip > 0)
-	  {
-	    while (!x) x = elements[++loc];
-	    skip--;
-	    x = hash_entry_next(x);
-	  }
-	if (is_pair(dest))
-	  {
-	    s7_pointer p;
-	    check_free_heap_size(sc, end - start);
-	    for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
-	      {
-		while (!x) x = elements[++loc];
-		set_car(p, cons_unchecked(sc, hash_entry_key(x), hash_entry_value(x)));
-		x = hash_entry_next(x);
-	      }}
-	else
-	  if (is_let(dest))
-	    {
-	      for (i = start; i < end; i++)
-		{
-		  s7_pointer symbol;
-		  while (!x) x = elements[++loc];
-		  symbol = hash_entry_key(x);
-		  if (!is_symbol(symbol))
-		    copy_element_error_nr(sc, caller, i + 1, symbol, T_SYMBOL);
-		  if (is_constant_symbol(sc, symbol))
-		    error_nr(sc, sc->wrong_type_arg_symbol,
-			     set_elist_4(sc, wrap_string(sc, "~A into ~A: ~A is a constant", 28), caller, dest, symbol));
-		  if ((symbol != sc->let_ref_fallback_symbol) &&
-		      (symbol != sc->let_set_fallback_symbol))
-		    add_slot_checked_with_id(sc, dest, symbol, hash_entry_value(x)); /* ...unchecked... if size ok */
-		  x = hash_entry_next(x);
-		}}
-	  else
-	    {
-	      check_free_heap_size(sc, end - start);
-	      for (i = start, j = 0; i < end; i++, j++)
-		{
-		  while (!x) x = elements[++loc];
-		  set(sc, dest, j, cons_unchecked(sc, hash_entry_key(x), hash_entry_value(x)));
-		  x = hash_entry_next(x);
-		}}
+        s7_int loc = -1, skip = start;
+        hash_entry_t **elements = hash_table_elements(source);
+        hash_entry_t *x = NULL;
+
+        while (skip > 0)
+          {
+            while (!x) x = elements[++loc];
+            skip--;
+            x = hash_entry_next(x);
+          }
+        if (is_pair(dest))
+          {
+            s7_pointer p;
+            check_free_heap_size(sc, end - start);
+            for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
+              {
+                while (!x) x = elements[++loc];
+                set_car(p, cons_unchecked(sc, hash_entry_key(x), hash_entry_value(x)));
+                x = hash_entry_next(x);
+              }}
+        else
+          if (is_let(dest))
+            {
+              for (i = start; i < end; i++)
+                {
+                  s7_pointer symbol;
+                  while (!x) x = elements[++loc];
+                  symbol = hash_entry_key(x);
+                  if (!is_symbol(symbol))
+                    copy_element_error_nr(sc, caller, i + 1, symbol, T_SYMBOL);
+                  if (is_constant_symbol(sc, symbol))
+                    error_nr(sc, sc->wrong_type_arg_symbol,
+                             set_elist_4(sc, wrap_string(sc, "~A into ~A: ~A is a constant", 28), caller, dest, symbol));
+                  if ((symbol != sc->let_ref_fallback_symbol) &&
+                      (symbol != sc->let_set_fallback_symbol))
+                    add_slot_checked_with_id(sc, dest, symbol, hash_entry_value(x)); /* ...unchecked... if size ok */
+                  x = hash_entry_next(x);
+                }}
+          else
+            {
+              check_free_heap_size(sc, end - start);
+              for (i = start, j = 0; i < end; i++, j++)
+                {
+                  while (!x) x = elements[++loc];
+                  set(sc, dest, j, cons_unchecked(sc, hash_entry_key(x), hash_entry_value(x)));
+                  x = hash_entry_next(x);
+                }}
         return(dest);
       }
 
     case T_VECTOR:
       {
-	s7_pointer *vals = vector_elements(source);
-	if (is_float_vector(dest))
-	  {
-	    s7_double *dst = float_vector_floats(dest);
-	    for (i = start, j = 0; i < end; i++, j++)
-	      dst[j] = real_to_double(sc, vals[i], symbol_name(caller));
-	    return(dest);
-	  }
-	if (is_int_vector(dest))
-	  {
-	    s7_int *dst = int_vector_ints(dest);
-	    for (i = start, j = 0; i < end; i++, j++)
-	      {
-		if (!s7_is_integer(vals[i]))
-		  copy_element_error_nr(sc, caller, i + 1, vals[i], T_INTEGER);
-		dst[j] = s7_integer_clamped_if_gmp(sc, vals[i]);
-	      }
-	    return(dest);
-	  }
-	if (is_string(dest))
-	  {
-	    char *dst = string_value(dest);
-	    for (i = start, j = 0; i < end; i++, j++)
-	      {
-		if (!is_character(vals[i]))
-		  copy_element_error_nr(sc, caller, i + 1, vals[i], T_CHARACTER);
-		dst[j] = character(vals[i]);
-	      }
-	    return(dest);
-	  }
-	if (is_byte_vector(dest))
-	  {
-	    uint8_t *dst = (uint8_t *)byte_vector_bytes(dest);
-	    for (i = start, j = 0; i < end; i++, j++)
-	      {
-		s7_int byte;
-		if (!s7_is_integer(vals[i]))
-		  copy_element_error_with_type_nr(sc, caller, i + 1, vals[i], an_unsigned_byte_string);
-		byte = s7_integer_clamped_if_gmp(sc, vals[i]);
-		if ((byte >= 0) && (byte < 256))
-		  dst[j] = (uint8_t)byte;
-		else copy_element_error_with_type_nr(sc, caller, i + 1, vals[i], an_unsigned_byte_string);
-	      }
-	    return(dest);
-	  }}
+        s7_pointer *vals = vector_elements(source);
+        if (is_float_vector(dest))
+          {
+            s7_double *dst = float_vector_floats(dest);
+            for (i = start, j = 0; i < end; i++, j++)
+              dst[j] = real_to_double(sc, vals[i], symbol_name(caller));
+            return(dest);
+          }
+        if (is_int_vector(dest))
+          {
+            s7_int *dst = int_vector_ints(dest);
+            for (i = start, j = 0; i < end; i++, j++)
+              {
+                if (!s7_is_integer(vals[i]))
+                  copy_element_error_nr(sc, caller, i + 1, vals[i], T_INTEGER);
+                dst[j] = s7_integer_clamped_if_gmp(sc, vals[i]);
+              }
+            return(dest);
+          }
+        if (is_string(dest))
+          {
+            char *dst = string_value(dest);
+            for (i = start, j = 0; i < end; i++, j++)
+              {
+                if (!is_character(vals[i]))
+                  copy_element_error_nr(sc, caller, i + 1, vals[i], T_CHARACTER);
+                dst[j] = character(vals[i]);
+              }
+            return(dest);
+          }
+        if (is_byte_vector(dest))
+          {
+            uint8_t *dst = (uint8_t *)byte_vector_bytes(dest);
+            for (i = start, j = 0; i < end; i++, j++)
+              {
+                s7_int byte;
+                if (!s7_is_integer(vals[i]))
+                  copy_element_error_with_type_nr(sc, caller, i + 1, vals[i], an_unsigned_byte_string);
+                byte = s7_integer_clamped_if_gmp(sc, vals[i]);
+                if ((byte >= 0) && (byte < 256))
+                  dst[j] = (uint8_t)byte;
+                else copy_element_error_with_type_nr(sc, caller, i + 1, vals[i], an_unsigned_byte_string);
+              }
+            return(dest);
+          }}
       break;
 
     case T_FLOAT_VECTOR:
       {
-	s7_double *src = float_vector_floats(source);
-	/* int-vector destination can't normally work, fractional parts get rounded away */
-	if ((is_t_vector(dest)) && (!is_typed_vector(dest)))
-	  {
-	    s7_pointer *dst = vector_elements(dest);
-	    check_free_heap_size(sc, end - start);
-	    for (i = start, j = 0; i < end; i++, j++)
-	      dst[j] = make_real_unchecked(sc, src[i]);
-	    return(dest);
-	  }}
+        s7_double *src = float_vector_floats(source);
+        /* int-vector destination can't normally work, fractional parts get rounded away */
+        if ((is_t_vector(dest)) && (!is_typed_vector(dest)))
+          {
+            s7_pointer *dst = vector_elements(dest);
+            check_free_heap_size(sc, end - start);
+            for (i = start, j = 0; i < end; i++, j++)
+              dst[j] = make_real_unchecked(sc, src[i]);
+            return(dest);
+          }}
       break;
 
     case T_INT_VECTOR:
       {
-	s7_int *src = int_vector_ints(source);
-	if (is_float_vector(dest))
-	  {
-	    s7_double *dst = float_vector_floats(dest);
-	    for (i = start, j = 0; i < end; i++, j++)
-	      dst[j] = (s7_double)(src[i]);
-	    return(dest);
-	  }
-	if ((is_t_vector(dest)) && (!is_typed_vector(dest)))
-	  {
-	    s7_pointer *dst = vector_elements(dest);
-	    check_free_heap_size(sc, end - start);
-	    for (i = start, j = 0; i < end; i++, j++)
-	      dst[j] = make_integer_unchecked(sc, src[i]);
-	    return(dest);
-	  }
-	if (is_string(dest))
-	  {
-	    for (i = start, j = 0; i < end; i++, j++)
-	      {
-		if ((src[i] < 0) || (src[i] > 255))
-		  copy_element_error_with_type_nr(sc, caller, i + 1, wrap_integer(sc, src[i]), an_unsigned_byte_string);
-		string_value(dest)[j] = (uint8_t)(src[i]);
-	      }
-	    return(dest);
-	  }
-	if (is_byte_vector(dest))
-	  {
-	    for (i = start, j = 0; i < end; i++, j++)
-	      {
-		if ((src[i] < 0) || (src[i] > 255))
-		  copy_element_error_with_type_nr(sc, caller, i + 1, wrap_integer(sc, src[i]), an_unsigned_byte_string);
-		byte_vector(dest, j) = (uint8_t)(src[i]);
-	      }
-	    return(dest);
-	  }}
+        s7_int *src = int_vector_ints(source);
+        if (is_float_vector(dest))
+          {
+            s7_double *dst = float_vector_floats(dest);
+            for (i = start, j = 0; i < end; i++, j++)
+              dst[j] = (s7_double)(src[i]);
+            return(dest);
+          }
+        if ((is_t_vector(dest)) && (!is_typed_vector(dest)))
+          {
+            s7_pointer *dst = vector_elements(dest);
+            check_free_heap_size(sc, end - start);
+            for (i = start, j = 0; i < end; i++, j++)
+              dst[j] = make_integer_unchecked(sc, src[i]);
+            return(dest);
+          }
+        if (is_string(dest))
+          {
+            for (i = start, j = 0; i < end; i++, j++)
+              {
+                if ((src[i] < 0) || (src[i] > 255))
+                  copy_element_error_with_type_nr(sc, caller, i + 1, wrap_integer(sc, src[i]), an_unsigned_byte_string);
+                string_value(dest)[j] = (uint8_t)(src[i]);
+              }
+            return(dest);
+          }
+        if (is_byte_vector(dest))
+          {
+            for (i = start, j = 0; i < end; i++, j++)
+              {
+                if ((src[i] < 0) || (src[i] > 255))
+                  copy_element_error_with_type_nr(sc, caller, i + 1, wrap_integer(sc, src[i]), an_unsigned_byte_string);
+                byte_vector(dest, j) = (uint8_t)(src[i]);
+              }
+            return(dest);
+          }}
       break;
 
     case T_BYTE_VECTOR:
       if ((is_t_vector(dest)) && (!is_typed_vector(dest)))
-	{
-	  s7_pointer *dst = vector_elements(dest);
-	  check_free_heap_size(sc, end - start);
-	  for (i = start, j = 0; i < end; i++, j++)
-	    dst[j] = small_int(byte_vector(source, i));
-	  return(dest);
-	}
+        {
+          s7_pointer *dst = vector_elements(dest);
+          check_free_heap_size(sc, end - start);
+          for (i = start, j = 0; i < end; i++, j++)
+            dst[j] = small_int(byte_vector(source, i));
+          return(dest);
+        }
       if (is_int_vector(dest))
-	{
-	  s7_int *els = int_vector_ints(dest);
-	  for (i = start, j = 0; i < end; i++, j++)
-	    els[j] = (s7_int)((uint8_t)(byte_vector(source, i)));
-	  return(dest);
-	}
+        {
+          s7_int *els = int_vector_ints(dest);
+          for (i = start, j = 0; i < end; i++, j++)
+            els[j] = (s7_int)((uint8_t)(byte_vector(source, i)));
+          return(dest);
+        }
       if (is_float_vector(dest))
-	{
-	  s7_double *els = float_vector_floats(dest);
-	  for (i = start, j = 0; i < end; i++, j++)
-	    els[j] = (s7_double)((uint8_t)(byte_vector(source, i)));
-	  return(dest);
-	}
+        {
+          s7_double *els = float_vector_floats(dest);
+          for (i = start, j = 0; i < end; i++, j++)
+            els[j] = (s7_double)((uint8_t)(byte_vector(source, i)));
+          return(dest);
+        }
       break;
 
     case T_STRING:
       if ((is_t_vector(dest))  && (!is_typed_vector(dest)))
-	{
-	  s7_pointer *dst = vector_elements(dest);
-	  for (i = start, j = 0; i < end; i++, j++)
-	    dst[j] = chars[(uint8_t)string_value(source)[i]];
-	  return(dest);
-	}
+        {
+          s7_pointer *dst = vector_elements(dest);
+          for (i = start, j = 0; i < end; i++, j++)
+            dst[j] = chars[(uint8_t)string_value(source)[i]];
+          return(dest);
+        }
       if (is_int_vector(dest))
-	{
-	  s7_int *els = int_vector_ints(dest);
-	  for (i = start, j = 0; i < end; i++, j++)
-	    els[j] = (s7_int)((uint8_t)(string_value(source)[i]));
-	  return(dest);
-	}
+        {
+          s7_int *els = int_vector_ints(dest);
+          for (i = start, j = 0; i < end; i++, j++)
+            els[j] = (s7_int)((uint8_t)(string_value(source)[i]));
+          return(dest);
+        }
       if (is_float_vector(dest))
-	{
-	  s7_double *els = float_vector_floats(dest);
-	  for (i = start, j = 0; i < end; i++, j++)
-	    els[j] = (s7_double)((uint8_t)(string_value(source)[i]));
-	  return(dest);
-	}
+        {
+          s7_double *els = float_vector_floats(dest);
+          for (i = start, j = 0; i < end; i++, j++)
+            els[j] = (s7_double)((uint8_t)(string_value(source)[i]));
+          return(dest);
+        }
       break;
     }
 
@@ -49901,23 +49901,23 @@ static s7_pointer s7_copy_1(s7_scheme *sc, s7_pointer caller, s7_pointer args)
     {
       s7_pointer p;
       if (is_float_vector(source))
-	{
-	  s7_double *els = float_vector_floats(source);
-	  check_free_heap_size(sc, end - start);
-	  for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
-	    set_car(p, make_real_unchecked(sc, els[i]));
-	}
+        {
+          s7_double *els = float_vector_floats(source);
+          check_free_heap_size(sc, end - start);
+          for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
+            set_car(p, make_real_unchecked(sc, els[i]));
+        }
       else
-	if (is_int_vector(source))
-	  {
-	    s7_int *els = int_vector_ints(source);
-	    check_free_heap_size(sc, end - start);
-	    for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
-	      set_car(p, make_integer_unchecked(sc, els[i]));
-	  }
-	else
-	  for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
-	    set_car(p, get(sc, source, i));
+        if (is_int_vector(source))
+          {
+            s7_int *els = int_vector_ints(source);
+            check_free_heap_size(sc, end - start);
+            for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
+              set_car(p, make_integer_unchecked(sc, els[i]));
+          }
+        else
+          for (i = start, p = dest; (i < end) && (is_pair(p)); i++, p = cdr(p))
+            set_car(p, get(sc, source, i));
     }
   else /* if source == dest here, we're moving data backwards, so this is safe in either case */
     for (i = start, j = 0; i < end; i++, j++)
@@ -49946,12 +49946,12 @@ s7_pointer s7_reverse(s7_scheme *sc, s7_pointer a) /* just pairs */
     {
       sc->w = cons(sc, car(x), sc->w);
       if (is_pair(cdr(x)))
-	{
-	  x = cdr(x);
-	  sc->w = cons_unchecked(sc, car(x), sc->w);
-	}
+        {
+          x = cdr(x);
+          sc->w = cons_unchecked(sc, car(x), sc->w);
+        }
       if (x == p) /* this can take awhile to notice there's a cycle, but what does the caller expect? */
-	break;
+        break;
     }
   p = (is_null(x)) ? sc->w : cons(sc, x, sc->w);    /* ?? this means that (reverse '(1 2 . 3)) returns '(3 2 1) -- we used to return () here */
   sc->w = sc->unused;
@@ -50052,7 +50052,7 @@ static s7_pointer reverse_p_p(s7_scheme *sc, s7_pointer p)
     case T_C_OBJECT:
       check_method(sc, p, sc->reverse_symbol, set_plist_1(sc, p));
       if (!c_object_reverse(sc, p))
-	syntax_error_nr(sc, "attempt to reverse ~S?", 22, p);
+        syntax_error_nr(sc, "attempt to reverse ~S?", 22, p);
       return((*(c_object_reverse(sc, p)))(sc, set_plist_1(sc, p)));
     case T_LET:
       check_method(sc, p, sc->reverse_symbol, set_plist_1(sc, p));
@@ -50081,16 +50081,16 @@ static s7_pointer any_list_reverse_in_place(s7_scheme *sc, s7_pointer term, s7_p
     {
       s7_pointer q = cdr(p);
       if (is_null(q))
-	{
-	  set_cdr(p, result);
-	  return(p);
-	}
+        {
+          set_cdr(p, result);
+          return(p);
+        }
       if ((is_pair(q)) && (!is_immutable_pair(q)))
-	{
-	  set_cdr(p, result);
-	  result = p;
-	  p = q;
-	}
+        {
+          set_cdr(p, result);
+          result = p;
+          p = q;
+        }
       else return(sc->nil); /* improper or immutable */
     }
   return(result);
@@ -50124,29 +50124,29 @@ static s7_pointer string_or_byte_vector_reverse_in_place(s7_scheme *sc, s7_point
       uint32_t *dst = (uint32_t *)(bytes + len - 4);
       uint32_t *src = (uint32_t *)bytes;
       while (src < dst)
-	{
-	  uint32_t a, b;
-	  LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
-	  LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
-	  LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
-	  LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
-	}}
+        {
+          uint32_t a, b;
+          LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
+          LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
+          LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
+          LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
+        }}
   else
     if ((len & 0x1f) == 0) /* 4-bytes at a time, 4 times per loop == 16 */
       {
-	uint32_t *dst = (uint32_t *)(bytes + len - 4);
-	uint32_t *src = (uint32_t *)bytes;
-	while (src < dst)
-	  {
-	    uint32_t a, b;
-	    LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
-	  }}
+        uint32_t *dst = (uint32_t *)(bytes + len - 4);
+        uint32_t *src = (uint32_t *)bytes;
+        while (src < dst)
+          {
+            uint32_t a, b;
+            LOOP_4(a = *src; b = *dst; *src++ = bswap_32(b); *dst-- = bswap_32(a));
+          }}
     else
 #endif
       {
-	char *s1 = (char *)bytes;
-	char *s2 = (char *)(s1 + len - 1);
-	while (s1 < s2) {char c; c = *s1; *s1++ = *s2; *s2-- = c;}
+        char *s1 = (char *)bytes;
+        char *s2 = (char *)(s1 + len - 1);
+        while (s1 < s2) {char c; c = *s1; *s1++ = *s2; *s2-- = c;}
       }
   return(p);
 }
@@ -50164,19 +50164,19 @@ static s7_pointer int_vector_reverse_in_place(s7_scheme *sc, s7_pointer p)
   if ((len & 0x3f) == 0) /* 63 for 2 32's */
     while (s1 < s2)
       {
-	s7_int c;
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        s7_int c;
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
       }
   else
     if ((len & 0xf) == 0) /* not 0x7 -- odd multiple of 8 will leave center ints unreversed (we're moving 2 at a time) */
       while (s1 < s2)
-	{
-	  s7_int c;
-	  LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	}
+        {
+          s7_int c;
+          LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        }
     else while (s1 < s2) {s7_int c; c = *s1; *s1++ = *s2; *s2-- = c;}
   return(p);
 }
@@ -50192,19 +50192,19 @@ static s7_pointer float_vector_reverse_in_place(s7_scheme *sc, s7_pointer p)
   if ((len & 0x3f) == 0) /* 63 for 2 32's */
     while (s1 < s2)
       {
-	s7_double c;
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        s7_double c;
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
       }
   else
     if ((len & 0xf) == 0)
       while (s1 < s2)
-	{
-	  s7_double c;
-	  LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	}
+        {
+          s7_double c;
+          LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        }
     else while (s1 < s2) {s7_double c; c = *s1; *s1++ = *s2; *s2-- = c;}
   return(p);
 }
@@ -50220,19 +50220,19 @@ static s7_pointer vector_reverse_in_place(s7_scheme *sc, s7_pointer p)
   if ((len & 0x3f) == 0) /* 63 for 2 32's */
     while (s1 < s2)
       {
-	s7_pointer c;
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        s7_pointer c;
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
       }
   else
     if ((len & 0xf) == 0)
       while (s1 < s2)
-	{
-	  s7_pointer c;
-	  LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
-	}
+        {
+          s7_pointer c;
+          LOOP_8(c = *s1; *s1++ = *s2; *s2-- = c);
+        }
     else while (s1 < s2) {s7_pointer c; c = *s1; *s1++ = *s2; *s2-- = c;}
   return(p);
 }
@@ -50251,16 +50251,16 @@ static s7_pointer g_reverse_in_place(s7_scheme *sc, s7_pointer args)
 
     case T_PAIR:
       if (is_immutable_pair(p))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->reverseb_symbol, p));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->reverseb_symbol, p));
       {
-	s7_pointer np = any_list_reverse_in_place(sc, sc->nil, p);
-	if (is_null(np))
-	  {
-	    if (!s7_is_proper_list(sc, p))
-	      wrong_type_error_nr(sc, sc->reverseb_symbol, 1, car(args), wrap_string(sc, "a proper list", 13));
-	    wrong_type_error_nr(sc, sc->reverseb_symbol, 1, car(args), wrap_string(sc, "a mutable proper list", 21));
-	  }
-	return(np);
+        s7_pointer np = any_list_reverse_in_place(sc, sc->nil, p);
+        if (is_null(np))
+          {
+            if (!s7_is_proper_list(sc, p))
+              wrong_type_error_nr(sc, sc->reverseb_symbol, 1, car(args), wrap_string(sc, "a proper list", 13));
+            wrong_type_error_nr(sc, sc->reverseb_symbol, 1, car(args), wrap_string(sc, "a mutable proper list", 21));
+          }
+        return(np);
       }
       /* (reverse! p) is supposed to change p directly and lisp programmers expect reverse! to be fast
        * so in a sense this is different from the other cases: it assumes (set! p (reverse! p))
@@ -50279,14 +50279,14 @@ static s7_pointer g_reverse_in_place(s7_scheme *sc, s7_pointer args)
 
     default:
       if (is_immutable(p))
-	{
-	  if (is_simple_sequence(p))
-	    immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->reverseb_symbol, p));
-	  sole_arg_wrong_type_error_nr(sc, sc->reverseb_symbol, p, a_sequence_string);
-	}
+        {
+          if (is_simple_sequence(p))
+            immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->reverseb_symbol, p));
+          sole_arg_wrong_type_error_nr(sc, sc->reverseb_symbol, p, a_sequence_string);
+        }
       if ((is_simple_sequence(p)) &&
-	  (!has_active_methods(sc, p)))
-	sole_arg_wrong_type_error_nr(sc, sc->reverseb_symbol, p, wrap_string(sc, "a vector, string, or list", 25));
+          (!has_active_methods(sc, p)))
+        sole_arg_wrong_type_error_nr(sc, sc->reverseb_symbol, p, wrap_string(sc, "a vector, string, or list", 25));
       return(method_or_bust_p(sc, p, sc->reverseb_symbol, a_sequence_string));
     }
   return(p);
@@ -50333,18 +50333,18 @@ static s7_pointer pair_fill(s7_scheme *sc, s7_pointer args) /* args=(list tree-t
   for (s7_pointer x = obj, y = obj; ; i++)
     {
       if ((end > 0) && (i >= end))
-	return(val);
+        return(val);
       if (i >= start) set_car(x, val);
       if (!is_pair(cdr(x)))
-	{
-	  if (!is_null(cdr(x)))
-	    set_cdr(x, val);
-	  return(val);
-	}
+        {
+          if (!is_null(cdr(x)))
+            set_cdr(x, val);
+          return(val);
+        }
       x = cdr(x);
       if ((i & 1) != 0) y = cdr(y);
       if (x == y)
-	return(val);
+        return(val);
     }
   return(val);
 }
@@ -50367,7 +50367,7 @@ s7_pointer s7_fill(s7_scheme *sc, s7_pointer args)
     case T_HASH_TABLE: return(hash_table_fill(sc, args));
     case T_NIL:
       if (!is_null(cddr(args)))  /* (fill! () 1 21 #\a)? */
-	syntax_error_nr(sc, "fill! () ... includes indices: ~S?", 34, cddr(args));
+        syntax_error_nr(sc, "fill! () ... includes indices: ~S?", 34, cddr(args));
       return(cadr(args));        /* this parallels the empty vector case */
     case T_BYTE_VECTOR: case T_INT_VECTOR: case T_FLOAT_VECTOR: case T_VECTOR:
       return(g_vector_fill_1(sc, sc->fill_symbol, args));
@@ -50377,7 +50377,7 @@ s7_pointer s7_fill(s7_scheme *sc, s7_pointer args)
     case T_C_OBJECT:
       check_method(sc, p, sc->fill_symbol, args);
       if (!c_object_fill(sc, p)) /* default is NULL (s7_make_c_type) */
-	syntax_error_nr(sc, "attempt to fill ~S?", 19, p);
+        syntax_error_nr(sc, "attempt to fill ~S?", 19, p);
       return((*(c_object_fill(sc, p)))(sc, args));
     default:
       check_method(sc, p, sc->fill_symbol, args);
@@ -50400,19 +50400,19 @@ static s7_int total_sequence_length(s7_scheme *sc, s7_pointer args, s7_pointer c
       s7_pointer seq = car(p);
       s7_int n = sequence_length(sc, seq);
       if ((n > 0) &&
-	  (typ != T_FREE) &&
-	  ((type(seq) == T_HASH_TABLE) ||  /* can't append hash-tables (no obvious meaning to the operation) */
-	   ((type(seq) == T_LET) &&        /*   similarly for lets, unless this is a mock-string or something similar */
-	    ((!has_active_methods(sc, seq)) || (find_method(sc, seq, caller) == sc->undefined)))))
-	{
-	  wrong_type_error_nr(sc, caller, i, seq, sc->type_names[typ]);
-	  return(0);
-	}
+          (typ != T_FREE) &&
+          ((type(seq) == T_HASH_TABLE) ||  /* can't append hash-tables (no obvious meaning to the operation) */
+           ((type(seq) == T_LET) &&        /*   similarly for lets, unless this is a mock-string or something similar */
+            ((!has_active_methods(sc, seq)) || (find_method(sc, seq, caller) == sc->undefined)))))
+        {
+          wrong_type_error_nr(sc, caller, i, seq, sc->type_names[typ]);
+          return(0);
+        }
       if (n < 0)
-	{
-	  wrong_type_error_nr(sc, caller, i, seq, (is_pair(seq)) ? a_proper_list_string : a_sequence_string);
-	  return(0);
-	}
+        {
+          wrong_type_error_nr(sc, caller, i, seq, (is_pair(seq)) ? a_proper_list_string : a_sequence_string);
+          return(0);
+        }
       len += n;
     }
   return(len);
@@ -50434,10 +50434,10 @@ static s7_pointer vector_append(s7_scheme *sc, s7_pointer args, uint8_t typ, s7_
     {
       unstack_gc_protect(sc);
       error_nr(sc, sc->out_of_range_symbol,
-	       set_elist_4(sc, wrap_string(sc, "~S new vector length, ~D, is larger than (*s7* 'max-vector-length): ~D", 70),
-			   caller,
-			   wrap_integer(sc, len),
-			   wrap_integer(sc, sc->max_vector_length)));
+               set_elist_4(sc, wrap_string(sc, "~S new vector length, ~D, is larger than (*s7* 'max-vector-length): ~D", 70),
+                           caller,
+                           wrap_integer(sc, len),
+                           wrap_integer(sc, sc->max_vector_length)));
     }
   new_vec = make_vector_1(sc, len, (typ == T_VECTOR) ? FILLED : NOT_FILLED, typ);  /* might hit GC in loop below so we can't use NOT_FILLED here (??) */
   typed = (typ == T_VECTOR);
@@ -50455,7 +50455,7 @@ static s7_pointer vector_append(s7_scheme *sc, s7_pointer args, uint8_t typ, s7_
       fv_elements = float_vector_floats(new_vec);
     else
       if (typ == T_INT_VECTOR)
-	iv_elements = int_vector_ints(new_vec);
+        iv_elements = int_vector_ints(new_vec);
       else byte_elements = byte_vector_bytes(new_vec);
 
   pargs = list_2(sc, sc->F, new_vec); /* car set below */
@@ -50466,31 +50466,31 @@ static s7_pointer vector_append(s7_scheme *sc, s7_pointer args, uint8_t typ, s7_
       s7_pointer x = car(p);
       s7_int n = sequence_length(sc, x);
       if (n > 0)
-	{
-	  if ((typed) && (is_typed_t_vector(x)))
-	    {
-	      if (!vtyper)
-		vtyper = typed_vector_typer(x);
-	      else
-		if (vtyper != typed_vector_typer(x))
-		  typed = false;
-	    }
-	  else typed = false;
-	  vector_length(new_vec) = n;
-	  set_car(pargs, x);
-	  s7_copy_1(sc, caller, pargs);             /* not set_plist_2 here! */
-	  vector_length(new_vec) = 0;               /* so GC doesn't march off the end */
-	  i += n;
-	  if (typ == T_VECTOR)
-	    vector_elements(new_vec) = (s7_pointer *)(v_elements + i);
-	  else
-	    if (typ == T_FLOAT_VECTOR)
-	      float_vector_floats(new_vec) = (s7_double *)(fv_elements + i);
-	    else
-	      if (typ == T_INT_VECTOR)
-		int_vector_ints(new_vec) = (s7_int *)(iv_elements + i);
-	      else byte_vector_bytes(new_vec) = (uint8_t *)(byte_elements + i);
-	}}
+        {
+          if ((typed) && (is_typed_t_vector(x)))
+            {
+              if (!vtyper)
+                vtyper = typed_vector_typer(x);
+              else
+                if (vtyper != typed_vector_typer(x))
+                  typed = false;
+            }
+          else typed = false;
+          vector_length(new_vec) = n;
+          set_car(pargs, x);
+          s7_copy_1(sc, caller, pargs);             /* not set_plist_2 here! */
+          vector_length(new_vec) = 0;               /* so GC doesn't march off the end */
+          i += n;
+          if (typ == T_VECTOR)
+            vector_elements(new_vec) = (s7_pointer *)(v_elements + i);
+          else
+            if (typ == T_FLOAT_VECTOR)
+              float_vector_floats(new_vec) = (s7_double *)(fv_elements + i);
+            else
+              if (typ == T_INT_VECTOR)
+                int_vector_ints(new_vec) = (s7_int *)(iv_elements + i);
+              else byte_vector_bytes(new_vec) = (uint8_t *)(byte_elements + i);
+        }}
   /* unstack_gc_protect(sc); */ /* free_cell(sc, pargs); */ /* this is trouble if any arg is openlet with append method -- e.g. block */
 
   if (typ == T_VECTOR)
@@ -50500,7 +50500,7 @@ static s7_pointer vector_append(s7_scheme *sc, s7_pointer args, uint8_t typ, s7_
       float_vector_floats(new_vec) = fv_elements;
     else
       if (typ == T_INT_VECTOR)
-	int_vector_ints(new_vec) = iv_elements;
+        int_vector_ints(new_vec) = iv_elements;
       else byte_vector_bytes(new_vec) = byte_elements;
   vector_length(new_vec) = len;
   if ((typed) && (vtyper))
@@ -50524,23 +50524,23 @@ static s7_pointer hash_table_append(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer seq = car(p);
       if (!sequence_is_empty(sc, seq))
-	{
-	  /* perhaps check seq-length+hash_table_entries(new_hash) > sc->max_vector_length here? */
-	  s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, seq, new_hash));
-	  if ((typed) && (is_hash_table(seq)) && (is_typed_hash_table(seq)))
-	    {
-	      if (!key_typer)
-		{ /* the equality/mapping procedures are either partly implicit or in hash-table-procedures -- a bit of a mess currently */
-		  key_typer = hash_table_key_typer(seq);
-		  value_typer = hash_table_value_typer(seq);
-		}
-	      else
-		if ((hash_table_key_typer(seq) != key_typer) ||
-		    (hash_table_value_typer(seq) != value_typer))
-		  typed = false;
-	    }
-	  else typed = false;
-	}}
+        {
+          /* perhaps check seq-length+hash_table_entries(new_hash) > sc->max_vector_length here? */
+          s7_copy_1(sc, sc->append_symbol, set_plist_2(sc, seq, new_hash));
+          if ((typed) && (is_hash_table(seq)) && (is_typed_hash_table(seq)))
+            {
+              if (!key_typer)
+                { /* the equality/mapping procedures are either partly implicit or in hash-table-procedures -- a bit of a mess currently */
+                  key_typer = hash_table_key_typer(seq);
+                  value_typer = hash_table_value_typer(seq);
+                }
+              else
+                if ((hash_table_key_typer(seq) != key_typer) ||
+                    (hash_table_value_typer(seq) != value_typer))
+                  typed = false;
+            }
+          else typed = false;
+        }}
   if ((typed) && (key_typer))
     {
       hash_table_set_procedures(new_hash, make_hash_table_procedures(sc));
@@ -50607,17 +50607,17 @@ s7_pointer s7_append(s7_scheme *sc, s7_pointer a, s7_pointer b)
     {
       s7_pointer q, p, np, op;
       if ((!is_pair(b)) && (!is_null(b)))
-	return(g_list_append(sc, list_2(sc, a, b)));
+        return(g_list_append(sc, list_2(sc, a, b)));
       q = list_1(sc, car(a));
       sc->temp8 = q;
       for (op = a, p = cdr(a), np = q; (is_pair(p)) && (p != op); p = cdr(p), np = cdr(np), op = cdr(op))
-	{
-	  set_cdr(np, list_1_unchecked(sc, car(p))); p = cdr(p); np = cdr(np);
-	  if (!is_pair(p)) break;
-	  set_cdr(np, list_1(sc, car(p)));
-	}
+        {
+          set_cdr(np, list_1_unchecked(sc, car(p))); p = cdr(p); np = cdr(np);
+          if (!is_pair(p)) break;
+          set_cdr(np, list_1(sc, car(p)));
+        }
       if (!is_null(p))
-	wrong_type_error_nr(sc, sc->append_symbol, 1, a, a_proper_list_string);
+        wrong_type_error_nr(sc, sc->append_symbol, 1, a, a_proper_list_string);
       set_cdr(np, b);
       sc->temp8 = sc->unused;
       return(q);
@@ -50676,48 +50676,48 @@ static s7_pointer iterator_to_list(s7_scheme *sc, s7_pointer obj)
     {
       s7_pointer val = s7_iterate(sc, obj);
       if ((val == ITERATOR_END) &&
-	  (iterator_is_at_end(obj)))
-	{
-	  if (is_pair(result)) unstack_gc_protect(sc);
-	  return(result);
-	}
+          (iterator_is_at_end(obj)))
+        {
+          if (is_pair(result)) unstack_gc_protect(sc);
+          return(result);
+        }
       if (sc->safety > NO_SAFETY)
-	{
-	  results++;
-	  if (results > 10000)
-	    {
-	      s7_warn(sc, 256, "iterator is creating a very long list!\n");
-	      results = S7_INT32_MIN;
-	    }}
+        {
+          results++;
+          if (results > 10000)
+            {
+              s7_warn(sc, 256, "iterator is creating a very long list!\n");
+              results = S7_INT32_MIN;
+            }}
       if (val != sc->no_value)
-	{
-	  if (is_null(result))
-	    {
-	      if (is_multiple_value(val))
-		{
-		  result = multiple_value(val);
-		  clear_multiple_value(val);
-		  for (p = result; is_pair(cdr(p)); p = cdr(p));
-		}
-	      else
-		{
-		  result = list_1(sc, val);
-		  p = result;
-		}
-	      gc_protect_via_stack(sc, result); /* unstacked above */
-	    }
-	  else
-	    if (is_multiple_value(val))
-	      {
-		set_cdr(p, multiple_value(val));
-		clear_multiple_value(val);
-		for (; is_pair(cdr(p)); p = cdr(p));
-	      }
-	    else
-	      {
-		set_cdr(p, list_1(sc, val));
-		p = cdr(p);
-	      }}}
+        {
+          if (is_null(result))
+            {
+              if (is_multiple_value(val))
+                {
+                  result = multiple_value(val);
+                  clear_multiple_value(val);
+                  for (p = result; is_pair(cdr(p)); p = cdr(p));
+                }
+              else
+                {
+                  result = list_1(sc, val);
+                  p = result;
+                }
+              gc_protect_via_stack(sc, result); /* unstacked above */
+            }
+          else
+            if (is_multiple_value(val))
+              {
+                set_cdr(p, multiple_value(val));
+                clear_multiple_value(val);
+                for (; is_pair(cdr(p)); p = cdr(p));
+              }
+            else
+              {
+                set_cdr(p, list_1(sc, val));
+                p = cdr(p);
+              }}}
 }
 
 static s7_pointer c_obj_to_list(s7_scheme *sc, s7_pointer obj) /* "c_object_to_list" is the ->list method mentioned below */
@@ -50778,23 +50778,23 @@ static s7_pointer object_to_list(s7_scheme *sc, s7_pointer obj) /* used only in
 static s7_pointer symbol_to_let(s7_scheme *sc, s7_pointer obj)
 {
   s7_pointer let = internal_inlet(sc, 4, sc->value_symbol, obj,
-				  sc->type_symbol, (is_keyword(obj)) ? sc->is_keyword_symbol :
-				                     ((is_gensym(obj)) ? sc->is_gensym_symbol : sc->is_symbol_symbol));
+                                  sc->type_symbol, (is_keyword(obj)) ? sc->is_keyword_symbol :
+                                                     ((is_gensym(obj)) ? sc->is_gensym_symbol : sc->is_symbol_symbol));
   if (!is_keyword(obj))
     {
       s7_int gc_loc = gc_protect_1(sc, let);
       s7_pointer val = s7_symbol_value(sc, obj);
       if (!sc->current_value_symbol)
-	sc->current_value_symbol = make_symbol(sc, "current-value", 13);
+        sc->current_value_symbol = make_symbol(sc, "current-value", 13);
       s7_varlet(sc, let, sc->current_value_symbol, val);
       s7_varlet(sc, let, sc->setter_symbol, setter_p_pp(sc, obj, sc->curlet));
       s7_varlet(sc, let, sc->is_mutable_symbol, make_boolean(sc, !is_immutable_symbol(obj)));
       if (!is_undefined(val))
-	{
-	  const char *doc = s7_documentation(sc, obj);
-	  if (doc)
-	    s7_varlet(sc, let, sc->local_documentation_symbol, s7_make_string(sc, doc));
-	}
+        {
+          const char *doc = s7_documentation(sc, obj);
+          if (doc)
+            s7_varlet(sc, let, sc->local_documentation_symbol, s7_make_string(sc, doc));
+        }
       s7_gc_unprotect_at(sc, gc_loc);
     }
   return(let);
@@ -50811,9 +50811,9 @@ static s7_pointer random_state_to_let(s7_scheme *sc, s7_pointer obj)
       sc->carry_symbol = make_symbol(sc, "carry", 5);
     }
   return(internal_inlet(sc, 8, sc->value_symbol, obj,
-			sc->type_symbol, sc->is_random_state_symbol,
-			sc->seed_symbol, make_integer(sc, random_seed(obj)),
-			sc->carry_symbol, make_integer(sc, random_carry(obj))));
+                        sc->type_symbol, sc->is_random_state_symbol,
+                        sc->seed_symbol, make_integer(sc, random_seed(obj)),
+                        sc->carry_symbol, make_integer(sc, random_carry(obj))));
 #endif
 }
 
@@ -50823,21 +50823,21 @@ static s7_pointer vector_to_let(s7_scheme *sc, s7_pointer obj)
   if (!sc->dimensions_symbol) sc->dimensions_symbol = make_symbol(sc, "dimensions", 10);
   if (!sc->original_vector_symbol) sc->original_vector_symbol = make_symbol(sc, "original-vector", 15);
   let = internal_inlet(sc, 10, sc->value_symbol, obj,
-		       sc->type_symbol, (is_subvector(obj)) ? cons(sc, sc->is_subvector_symbol, s7_type_of(sc, subvector_vector(obj))) : s7_type_of(sc, obj),
-		       sc->size_symbol, s7_length(sc, obj),
-		       sc->dimensions_symbol, g_vector_dimensions(sc, set_plist_1(sc, obj)),
-		       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_vector(obj)));
+                       sc->type_symbol, (is_subvector(obj)) ? cons(sc, sc->is_subvector_symbol, s7_type_of(sc, subvector_vector(obj))) : s7_type_of(sc, obj),
+                       sc->size_symbol, s7_length(sc, obj),
+                       sc->dimensions_symbol, g_vector_dimensions(sc, set_plist_1(sc, obj)),
+                       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_vector(obj)));
   gc_protect_via_stack(sc, let);
   if (is_subvector(obj))
     {
       s7_int pos = 0;
       switch (type(obj)) /* correct type matters here: gcc 10.2 with -O2 segfaults otherwise, cast to intptr_t has a similar role in earlier gcc's */
-	{
-	  case T_VECTOR:       pos = (s7_int)((intptr_t)(vector_elements(obj) - vector_elements(subvector_vector(obj))));         break;
-	  case T_INT_VECTOR:   pos = (s7_int)((intptr_t)(int_vector_ints(obj) - int_vector_ints(subvector_vector(obj))));         break;
-	  case T_FLOAT_VECTOR: pos = (s7_int)((intptr_t)(float_vector_floats(obj) - float_vector_floats(subvector_vector(obj)))); break;
-	  case T_BYTE_VECTOR:  pos = (s7_int)((intptr_t)(byte_vector_bytes(obj) - byte_vector_bytes(subvector_vector(obj))));     break;
-	}
+        {
+          case T_VECTOR:       pos = (s7_int)((intptr_t)(vector_elements(obj) - vector_elements(subvector_vector(obj))));         break;
+          case T_INT_VECTOR:   pos = (s7_int)((intptr_t)(int_vector_ints(obj) - int_vector_ints(subvector_vector(obj))));         break;
+          case T_FLOAT_VECTOR: pos = (s7_int)((intptr_t)(float_vector_floats(obj) - float_vector_floats(subvector_vector(obj)))); break;
+          case T_BYTE_VECTOR:  pos = (s7_int)((intptr_t)(byte_vector_bytes(obj) - byte_vector_bytes(subvector_vector(obj))));     break;
+        }
       s7_varlet(sc, let, sc->position_symbol, make_integer(sc, pos));
       s7_varlet(sc, let, sc->original_vector_symbol, subvector_vector(obj));
     }
@@ -50849,22 +50849,22 @@ static s7_pointer vector_to_let(s7_scheme *sc, s7_pointer obj)
     {
       s7_int max_len = 0, zeros = 0, ones = 0, twos = 0, biggies = 0;
       for (s7_int i = 0; i < SYMBOL_TABLE_SIZE; i++)
-	{
-	  s7_int j;
-	  s7_pointer p;
-	  for (p = vector_element(sc->symbol_table, i), j = 0; is_pair(p); p = cdr(p), j++);
-	  if (j == 0) zeros++; else
-	    if (j == 1) ones++;  else
-	      if (j == 2) twos++; else
-		biggies++;
-	  if (j > max_len) max_len = j;
-	}
+        {
+          s7_int j;
+          s7_pointer p;
+          for (p = vector_element(sc->symbol_table, i), j = 0; is_pair(p); p = cdr(p), j++);
+          if (j == 0) zeros++; else
+            if (j == 1) ones++;  else
+              if (j == 2) twos++; else
+                biggies++;
+          if (j > max_len) max_len = j;
+        }
       s7_varlet(sc, let, make_symbol(sc, "stats:0|1|2|n|max", 17),
-		cons(sc, make_integer(sc, zeros),
-		     cons(sc, make_integer(sc, ones),
-			  cons(sc, make_integer(sc, twos),
-			       cons(sc, make_integer(sc, biggies),
-				    cons(sc, make_integer(sc, max_len), sc->nil))))));
+                cons(sc, make_integer(sc, zeros),
+                     cons(sc, make_integer(sc, ones),
+                          cons(sc, make_integer(sc, twos),
+                               cons(sc, make_integer(sc, biggies),
+                                    cons(sc, make_integer(sc, max_len), sc->nil))))));
     }
 #endif
 
@@ -50886,29 +50886,29 @@ static void hash_table_checker_to_let(s7_scheme *sc, s7_pointer let, s7_pointer
       s7_varlet(sc, let, sc->function_symbol, sc->is_eqv_symbol);
     else
       if ((hash_table_checker(obj) == hash_equal) ||
-	  (hash_table_checker(obj) == hash_empty))
-	s7_varlet(sc, let, sc->function_symbol, sc->is_equal_symbol);
+          (hash_table_checker(obj) == hash_empty))
+        s7_varlet(sc, let, sc->function_symbol, sc->is_equal_symbol);
       else
-	if (hash_table_checker(obj) == hash_equivalent)
-	  s7_varlet(sc, let, sc->function_symbol, sc->is_equivalent_symbol);
-	else
-	  if ((hash_table_checker(obj) == hash_number_num_eq) ||
-	      (hash_table_checker(obj) == hash_int) ||
-	      (hash_table_checker(obj) == hash_float))
-	    s7_varlet(sc, let, sc->function_symbol, sc->num_eq_symbol);
-	  else
-	    if (hash_table_checker(obj) == hash_string)
-	      s7_varlet(sc, let, sc->function_symbol, sc->string_eq_symbol);
-	    else
-	      if (hash_table_checker(obj) == hash_char)
-		s7_varlet(sc, let, sc->function_symbol, sc->char_eq_symbol);
+        if (hash_table_checker(obj) == hash_equivalent)
+          s7_varlet(sc, let, sc->function_symbol, sc->is_equivalent_symbol);
+        else
+          if ((hash_table_checker(obj) == hash_number_num_eq) ||
+              (hash_table_checker(obj) == hash_int) ||
+              (hash_table_checker(obj) == hash_float))
+            s7_varlet(sc, let, sc->function_symbol, sc->num_eq_symbol);
+          else
+            if (hash_table_checker(obj) == hash_string)
+              s7_varlet(sc, let, sc->function_symbol, sc->string_eq_symbol);
+            else
+              if (hash_table_checker(obj) == hash_char)
+                s7_varlet(sc, let, sc->function_symbol, sc->char_eq_symbol);
 #if (!WITH_PURE_S7)
-	      else
-		if (hash_table_checker(obj) == hash_ci_char)
-		  s7_varlet(sc, let, sc->function_symbol, sc->char_ci_eq_symbol);
-		else
-		  if (hash_table_checker(obj) == hash_ci_string)
-		    s7_varlet(sc, let, sc->function_symbol, sc->string_ci_eq_symbol);
+              else
+                if (hash_table_checker(obj) == hash_ci_char)
+                  s7_varlet(sc, let, sc->function_symbol, sc->char_ci_eq_symbol);
+                else
+                  if (hash_table_checker(obj) == hash_ci_string)
+                    s7_varlet(sc, let, sc->function_symbol, sc->string_ci_eq_symbol);
 #endif
 }
 
@@ -50922,10 +50922,10 @@ static s7_pointer hash_table_to_let(s7_scheme *sc, s7_pointer obj)
       sc->weak_symbol = make_symbol(sc, "weak", 4);
     }
   let = internal_inlet(sc, 10, sc->value_symbol, obj,
-		       sc->type_symbol, sc->is_hash_table_symbol,
-		       sc->size_symbol, s7_length(sc, obj),
-		       sc->entries_symbol, make_integer(sc, hash_table_entries(obj)),
-		       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_hash_table(obj)));
+                       sc->type_symbol, sc->is_hash_table_symbol,
+                       sc->size_symbol, s7_length(sc, obj),
+                       sc->entries_symbol, make_integer(sc, hash_table_entries(obj)),
+                       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_hash_table(obj)));
   gc_loc = gc_protect_1(sc, let);
   if (is_weak_hash_table(obj))
     s7_varlet(sc, let, sc->weak_symbol, sc->T);
@@ -50934,15 +50934,15 @@ static s7_pointer hash_table_to_let(s7_scheme *sc, s7_pointer obj)
     {
       s7_pointer checker = hash_table_procedures_checker(obj);
       if (checker == sc->T)  /* perhaps typed because typers were set, but not checker/mapper */
-	hash_table_checker_to_let(sc, let, obj);
+        hash_table_checker_to_let(sc, let, obj);
       else s7_varlet(sc, let, sc->function_symbol, list_2(sc, checker, hash_table_procedures_mapper(obj)));
       s7_varlet(sc, let, sc->signature_symbol,
-	            (is_typed_hash_table(obj)) ?
-		      list_3(sc,
-			     hash_table_typer_symbol(sc, hash_table_value_typer(obj)),
-			     sc->is_hash_table_symbol,
-			     hash_table_typer_symbol(sc, hash_table_key_typer(obj))) :
- 	              sc->hash_table_signature);
+                    (is_typed_hash_table(obj)) ?
+                      list_3(sc,
+                             hash_table_typer_symbol(sc, hash_table_value_typer(obj)),
+                             sc->is_hash_table_symbol,
+                             hash_table_typer_symbol(sc, hash_table_key_typer(obj))) :
+                       sc->hash_table_signature);
     }
   else hash_table_checker_to_let(sc, let, obj);
 
@@ -50951,22 +50951,22 @@ static s7_pointer hash_table_to_let(s7_scheme *sc, s7_pointer obj)
     {
       s7_int max_len = 0, zeros = 0, ones = 0, twos = 0, biggies = 0, hash_len = hash_table_size(obj);
       for (s7_int i = 0; i < hash_len; i++)
-	{
-	  hash_entry_t *p;
-	  s7_int j;
-	  for (p = hash_table_element(obj, i), j = 0; p; p = hash_entry_next(p), j++);
-	  if (j == 0) zeros++; else
-	    if (j == 1) ones++;  else
-	      if (j == 2) twos++; else
-		biggies++;
-	  if (j > max_len) max_len = j;
-	}
+        {
+          hash_entry_t *p;
+          s7_int j;
+          for (p = hash_table_element(obj, i), j = 0; p; p = hash_entry_next(p), j++);
+          if (j == 0) zeros++; else
+            if (j == 1) ones++;  else
+              if (j == 2) twos++; else
+                biggies++;
+          if (j > max_len) max_len = j;
+        }
       s7_varlet(sc, let, make_symbol(sc, "stats:0|1|2|n|max", 17),
-		cons(sc, make_integer(sc, zeros),
-		     cons(sc, make_integer(sc, ones),
-			  cons(sc, make_integer(sc, twos),
-			       cons(sc, make_integer(sc, biggies),
-				    cons(sc, make_integer(sc, max_len), sc->nil))))));
+                cons(sc, make_integer(sc, zeros),
+                     cons(sc, make_integer(sc, ones),
+                          cons(sc, make_integer(sc, twos),
+                               cons(sc, make_integer(sc, biggies),
+                                    cons(sc, make_integer(sc, max_len), sc->nil))))));
     }
 #endif
 
@@ -50983,9 +50983,9 @@ static s7_pointer iterator_to_let(s7_scheme *sc, s7_pointer obj)
       sc->sequence_symbol = make_symbol(sc, "sequence", 8);
     }
   let = internal_inlet(sc, 8, sc->value_symbol, obj,
-		       sc->type_symbol, sc->is_iterator_symbol,
-		       sc->at_end_symbol, make_boolean(sc, iterator_is_at_end(obj)),
-		       sc->sequence_symbol, iterator_sequence(obj));
+                       sc->type_symbol, sc->is_iterator_symbol,
+                       sc->at_end_symbol, make_boolean(sc, iterator_is_at_end(obj)),
+                       sc->sequence_symbol, iterator_sequence(obj));
   gc_protect_via_stack(sc, let);
   if (is_pair(seq))
     s7_varlet(sc, let, sc->size_symbol, s7_length(sc, seq));
@@ -51020,11 +51020,11 @@ static s7_pointer let_to_let(s7_scheme *sc, s7_pointer obj)
       sc->alias_symbol = make_symbol(sc, "alias", 5);
     }
   let = internal_inlet(sc, 12, sc->value_symbol, obj,
-		       sc->type_symbol, sc->is_let_symbol,
-		       sc->size_symbol, s7_length(sc, obj),
-		       sc->open_symbol, make_boolean(sc, is_openlet(obj)),
-		       sc->outlet_symbol, (obj == sc->rootlet) ? sc->nil : let_outlet(obj),
-		       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_let(obj)));
+                       sc->type_symbol, sc->is_let_symbol,
+                       sc->size_symbol, s7_length(sc, obj),
+                       sc->open_symbol, make_boolean(sc, is_openlet(obj)),
+                       sc->outlet_symbol, (obj == sc->rootlet) ? sc->nil : let_outlet(obj),
+                       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_let(obj)));
   gc_loc = gc_protect_1(sc, let);
   if (obj == sc->rootlet)
     s7_varlet(sc, let, sc->alias_symbol, sc->rootlet_symbol);
@@ -51033,34 +51033,34 @@ static s7_pointer let_to_let(s7_scheme *sc, s7_pointer obj)
       s7_varlet(sc, let, sc->alias_symbol, sc->owlet_symbol);
     else
       if (is_funclet(obj))
-	{
-	  s7_varlet(sc, let, sc->function_symbol, funclet_function(obj));
-	  if ((has_let_file(obj)) &&
-	      (let_file(obj) <= (s7_int)sc->file_names_top) &&
-	      (let_line(obj) > 0) &&
-	      (let_line(obj) < 1000000))
-	    {
-	      s7_varlet(sc, let, sc->file_symbol, sc->file_names[let_file(obj)]);
-	      s7_varlet(sc, let, sc->line_symbol, make_integer(sc, let_line(obj)));
-	    }}
+        {
+          s7_varlet(sc, let, sc->function_symbol, funclet_function(obj));
+          if ((has_let_file(obj)) &&
+              (let_file(obj) <= (s7_int)sc->file_names_top) &&
+              (let_line(obj) > 0) &&
+              (let_line(obj) < 1000000))
+            {
+              s7_varlet(sc, let, sc->file_symbol, sc->file_names[let_file(obj)]);
+              s7_varlet(sc, let, sc->line_symbol, make_integer(sc, let_line(obj)));
+            }}
       else
-	if (obj == sc->s7_starlet)
-	  {
-	    s7_pointer iter = s7_make_iterator(sc, obj);
-	    s7_int gc_loc1 = gc_protect_1(sc, iter);
-	    while (true)
-	      {
-		s7_pointer x = s7_iterate(sc, iter);
-		if (iterator_is_at_end(iter)) break;
-		s7_varlet(sc, let, car(x), cdr(x));
-	      }
-	    s7_gc_unprotect_at(sc, gc_loc1);
-	  }
+        if (obj == sc->s7_starlet)
+          {
+            s7_pointer iter = s7_make_iterator(sc, obj);
+            s7_int gc_loc1 = gc_protect_1(sc, iter);
+            while (true)
+              {
+                s7_pointer x = s7_iterate(sc, iter);
+                if (iterator_is_at_end(iter)) break;
+                s7_varlet(sc, let, car(x), cdr(x));
+              }
+            s7_gc_unprotect_at(sc, gc_loc1);
+          }
   if (has_active_methods(sc, obj))
     {
       s7_pointer func = find_method(sc, obj, sc->object_to_let_symbol);
       if (func != sc->undefined)
-	s7_apply_function(sc, func, set_plist_2(sc, obj, let));
+        s7_apply_function(sc, func, set_plist_2(sc, obj, let));
     }
   s7_gc_unprotect_at(sc, gc_loc);
   return(let);
@@ -51075,17 +51075,17 @@ static s7_pointer c_object_to_let(s7_scheme *sc, s7_pointer obj)
       sc->c_object_let_symbol = make_symbol(sc, "c-object-let", 12);
     }
   let = internal_inlet(sc, 10, sc->value_symbol, obj,
-		       sc->type_symbol, sc->is_c_object_symbol,
-		       sc->c_object_type_symbol, make_integer(sc, c_object_type(obj)),
-		       sc->c_object_let_symbol, clet,
-		       sc->class_symbol, c_object_type_to_let(sc, obj));
+                       sc->type_symbol, sc->is_c_object_symbol,
+                       sc->c_object_type_symbol, make_integer(sc, c_object_type(obj)),
+                       sc->c_object_let_symbol, clet,
+                       sc->class_symbol, c_object_type_to_let(sc, obj));
   if ((is_let(clet)) &&
       ((has_active_methods(sc, clet)) || (has_active_methods(sc, obj))))
     {
       s7_int gc_loc = gc_protect_1(sc, let);
       s7_pointer func = find_method(sc, clet, sc->object_to_let_symbol);
       if (func != sc->undefined)
-	s7_apply_function(sc, func, set_plist_2(sc, obj, let));
+        s7_apply_function(sc, func, set_plist_2(sc, obj, let));
       s7_gc_unprotect_at(sc, gc_loc);
     }
   return(let);
@@ -51103,36 +51103,36 @@ static s7_pointer port_to_let(s7_scheme *sc, s7_pointer obj) /* note the underba
       sc->file_info_symbol = make_symbol(sc, "file-info", 9);
     }
   let = internal_inlet(sc, 10, sc->value_symbol, obj,
-		       /* obj as 'value means it will say "(closed)" when subsequently the let is displayed */
-		       sc->type_symbol, (is_input_port(obj)) ? sc->is_input_port_symbol : sc->is_output_port_symbol,
-		       sc->port_type_symbol, (is_string_port(obj)) ? sc->string_symbol : ((is_file_port(obj)) ? sc->file_symbol : sc->function_symbol),
-		       sc->closed_symbol, make_boolean(sc, port_is_closed(obj)),
-		       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_port(obj)));
+                       /* obj as 'value means it will say "(closed)" when subsequently the let is displayed */
+                       sc->type_symbol, (is_input_port(obj)) ? sc->is_input_port_symbol : sc->is_output_port_symbol,
+                       sc->port_type_symbol, (is_string_port(obj)) ? sc->string_symbol : ((is_file_port(obj)) ? sc->file_symbol : sc->function_symbol),
+                       sc->closed_symbol, make_boolean(sc, port_is_closed(obj)),
+                       sc->is_mutable_symbol, make_boolean(sc, !is_immutable_port(obj)));
   gc_loc = gc_protect_1(sc, let);
   if (is_file_port(obj))
     {
       s7_varlet(sc, let, sc->file_symbol, g_port_filename(sc, set_plist_1(sc, obj)));
       if (is_input_port(obj))
-	s7_varlet(sc, let, sc->line_symbol, g_port_line_number(sc, set_plist_1(sc, obj)));
+        s7_varlet(sc, let, sc->line_symbol, g_port_line_number(sc, set_plist_1(sc, obj)));
 #if (!MS_WINDOWS)
       if ((!port_is_closed(obj)) && (obj != sc->standard_error) && (obj != sc->standard_input) && (obj != sc->standard_output))
-	{
-	  struct stat sb;
-	  s7_varlet(sc, let, sc->file_symbol, make_integer(sc, fileno(port_file(obj))));
-	  if (fstat(fileno(port_file(obj)), &sb) != -1)
-	    {
-	      char c1[64], c2[64], str[512];
-	      int32_t bytes;
-	      strftime(c1, 64, "%a %d-%b-%Y %H:%M", localtime(&sb.st_atime));
-	      strftime(c2, 64, "%a %d-%b-%Y %H:%M", localtime(&sb.st_mtime));
-	      bytes = snprintf(str, 512, "mode: #o%u, links: %ld, owner uid: %d gid: %d, size: %ld bytes, last file access: %s, last file modification: %s",
-			       sb.st_mode,
-			       (long)sb.st_nlink,
-			       (int)sb.st_uid, (int)sb.st_gid,
-			       (long)sb.st_size,
-			       c1, c2);
-	      s7_varlet(sc, let, sc->file_info_symbol, make_string_with_length(sc, (const char *)str, bytes));
-	    }}
+        {
+          struct stat sb;
+          s7_varlet(sc, let, sc->file_symbol, make_integer(sc, fileno(port_file(obj))));
+          if (fstat(fileno(port_file(obj)), &sb) != -1)
+            {
+              char c1[64], c2[64], str[512];
+              int32_t bytes;
+              strftime(c1, 64, "%a %d-%b-%Y %H:%M", localtime(&sb.st_atime));
+              strftime(c2, 64, "%a %d-%b-%Y %H:%M", localtime(&sb.st_mtime));
+              bytes = snprintf(str, 512, "mode: #o%u, links: %ld, owner uid: %d gid: %d, size: %ld bytes, last file access: %s, last file modification: %s",
+                               sb.st_mode,
+                               (long)sb.st_nlink,
+                               (int)sb.st_uid, (int)sb.st_gid,
+                               (long)sb.st_size,
+                               c1, c2);
+              s7_varlet(sc, let, sc->file_info_symbol, make_string_with_length(sc, (const char *)str, bytes));
+            }}
 #endif
     }
   if ((is_string_port(obj)) && /* file port might not have a data buffer */
@@ -51145,7 +51145,7 @@ static s7_pointer port_to_let(s7_scheme *sc, s7_pointer obj) /* note the underba
        *   both valgrind and lib*san complain about the uninitialized data during strlen.
        */
       s7_varlet(sc, let, sc->data_symbol,
-		make_string_with_length(sc, (const char *)port_data(obj), ((port_position(obj)) > 16) ? 16 : port_position(obj))); /* sc->print_length? */
+                make_string_with_length(sc, (const char *)port_data(obj), ((port_position(obj)) > 16) ? 16 : port_position(obj))); /* sc->print_length? */
     }
   if (is_function_port(obj))
     s7_varlet(sc, let, sc->function_symbol, port_string_or_function(obj));
@@ -51158,9 +51158,9 @@ static s7_pointer closure_to_let(s7_scheme *sc, s7_pointer obj)
   const char *doc = s7_documentation(sc, obj);
   s7_pointer sig = s7_signature(sc, obj);
   s7_pointer let = internal_inlet(sc, 8, sc->value_symbol, obj,
-				  sc->type_symbol, (is_t_procedure(obj)) ? sc->is_procedure_symbol : sc->is_macro_symbol,
-				  sc->arity_symbol, s7_arity(sc, obj),
-				  sc->is_mutable_symbol, make_boolean(sc, !is_immutable(obj)));
+                                  sc->type_symbol, (is_t_procedure(obj)) ? sc->is_procedure_symbol : sc->is_macro_symbol,
+                                  sc->arity_symbol, s7_arity(sc, obj),
+                                  sc->is_mutable_symbol, make_boolean(sc, !is_immutable(obj)));
   gc_protect_via_stack(sc, let);
   if (is_pair(sig))
     s7_varlet(sc, let, sc->local_signature_symbol, sig);
@@ -51171,12 +51171,12 @@ static s7_pointer closure_to_let(s7_scheme *sc, s7_pointer obj)
     {
       s7_pointer flet = closure_let(obj);
       if ((has_let_file(flet)) &&
-	  (let_file(flet) <= (s7_int)sc->file_names_top) &&
-	  (let_line(flet) > 0))
-	{
-	  s7_varlet(sc, let, sc->file_symbol, sc->file_names[let_file(flet)]);
-	  s7_varlet(sc, let, sc->line_symbol, make_integer(sc, let_line(flet)));
-	}}
+          (let_file(flet) <= (s7_int)sc->file_names_top) &&
+          (let_line(flet) > 0))
+        {
+          s7_varlet(sc, let, sc->file_symbol, sc->file_names[let_file(flet)]);
+          s7_varlet(sc, let, sc->line_symbol, make_integer(sc, let_line(flet)));
+        }}
 
   if (closure_setter(obj) != sc->F)
     s7_varlet(sc, let, sc->local_setter_symbol, closure_setter(obj));
@@ -51184,8 +51184,8 @@ static s7_pointer closure_to_let(s7_scheme *sc, s7_pointer obj)
   if (!sc->source_symbol)
     sc->source_symbol = make_symbol(sc, "source", 6);
   s7_varlet(sc, let, sc->source_symbol,
-	    append_in_place(sc, list_2(sc, procedure_type_to_symbol(sc, type(obj)), closure_args(obj)),
-			    closure_body(obj)));
+            append_in_place(sc, list_2(sc, procedure_type_to_symbol(sc, type(obj)), closure_args(obj)),
+                            closure_body(obj)));
   unstack_gc_protect(sc);
   return(let);
 }
@@ -51200,10 +51200,10 @@ static s7_pointer c_pointer_to_let(s7_scheme *sc, s7_pointer obj)
     }
   if (!sc->pointer_symbol) sc->pointer_symbol = make_symbol(sc, "pointer", 7);
   return(internal_inlet(sc, 10, sc->value_symbol, obj,
-			sc->type_symbol, sc->is_c_pointer_symbol,
-			sc->pointer_symbol, make_integer(sc, (s7_int)((intptr_t)c_pointer(obj))),
-			sc->c_type_symbol, c_pointer_type(obj),
-			sc->info_symbol, c_pointer_info(obj)));
+                        sc->type_symbol, sc->is_c_pointer_symbol,
+                        sc->pointer_symbol, make_integer(sc, (s7_int)((intptr_t)c_pointer(obj))),
+                        sc->c_type_symbol, c_pointer_type(obj),
+                        sc->info_symbol, c_pointer_info(obj)));
 }
 
 static s7_pointer c_function_to_let(s7_scheme *sc, s7_pointer obj)
@@ -51211,9 +51211,9 @@ static s7_pointer c_function_to_let(s7_scheme *sc, s7_pointer obj)
   const char *doc = s7_documentation(sc, obj);
   s7_pointer sig = c_function_signature(obj);
   s7_pointer let = internal_inlet(sc, 8, sc->value_symbol, obj,
-				  sc->type_symbol, (is_t_procedure(obj)) ? sc->is_procedure_symbol : sc->is_macro_symbol,
-				  sc->arity_symbol, s7_arity(sc, obj),
-				  sc->is_mutable_symbol, make_boolean(sc, !is_immutable(obj)));
+                                  sc->type_symbol, (is_t_procedure(obj)) ? sc->is_procedure_symbol : sc->is_macro_symbol,
+                                  sc->arity_symbol, s7_arity(sc, obj),
+                                  sc->is_mutable_symbol, make_boolean(sc, !is_immutable(obj)));
   gc_protect_via_stack(sc, let);
   if (is_pair(sig))
     s7_varlet(sc, let, sc->local_signature_symbol, sig);
@@ -51233,10 +51233,10 @@ static s7_pointer goto_to_let(s7_scheme *sc, s7_pointer obj)
     sc->active_symbol = make_symbol(sc, "active", 6);
   if (is_symbol(call_exit_name(obj)))
     return(internal_inlet(sc, 8, sc->value_symbol, obj, sc->type_symbol, sc->is_goto_symbol,
-			  sc->active_symbol, make_boolean(sc, call_exit_active(obj)),
-			  sc->name_symbol, call_exit_name(obj)));
+                          sc->active_symbol, make_boolean(sc, call_exit_active(obj)),
+                          sc->name_symbol, call_exit_name(obj)));
   return(internal_inlet(sc, 6, sc->value_symbol, obj, sc->type_symbol, sc->is_goto_symbol,
-			sc->active_symbol, make_boolean(sc, call_exit_active(obj))));
+                        sc->active_symbol, make_boolean(sc, call_exit_active(obj))));
 }
 
 static s7_pointer object_to_let_p_p(s7_scheme *sc, s7_pointer obj)
@@ -51265,24 +51265,24 @@ static s7_pointer object_to_let_p_p(s7_scheme *sc, s7_pointer obj)
 
     case T_STRING:
       return(internal_inlet(sc, 8, sc->value_symbol, obj,
-			    sc->type_symbol, sc->is_string_symbol,
-			    sc->size_symbol, str_length(sc, obj),
-			    sc->is_mutable_symbol, make_boolean(sc, !is_immutable_string(obj))));
+                            sc->type_symbol, sc->is_string_symbol,
+                            sc->size_symbol, str_length(sc, obj),
+                            sc->is_mutable_symbol, make_boolean(sc, !is_immutable_string(obj))));
     case T_PAIR:
       return(internal_inlet(sc, 6, sc->value_symbol, obj,
-			    sc->type_symbol, sc->is_pair_symbol,
-			    sc->size_symbol, pair_length(sc, obj)));
+                            sc->type_symbol, sc->is_pair_symbol,
+                            sc->size_symbol, pair_length(sc, obj)));
     case T_SYNTAX:
       return(internal_inlet(sc, 6, sc->value_symbol, obj,
-			    sc->type_symbol, sc->is_syntax_symbol,
-			    sc->documentation_symbol, s7_make_string(sc, syntax_documentation(obj))));
+                            sc->type_symbol, sc->is_syntax_symbol,
+                            sc->documentation_symbol, s7_make_string(sc, syntax_documentation(obj))));
 
     case T_INT_VECTOR: case T_FLOAT_VECTOR: case T_BYTE_VECTOR: case T_VECTOR:
       return(vector_to_let(sc, obj));
 
     case T_CONTINUATION:  /* perhaps include the continuation-key */
       if (is_symbol(continuation_name(obj)))
-	return(internal_inlet(sc, 6, sc->value_symbol, obj, sc->type_symbol, sc->is_continuation_symbol, sc->name_symbol, continuation_name(obj)));
+        return(internal_inlet(sc, 6, sc->value_symbol, obj, sc->type_symbol, sc->is_continuation_symbol, sc->name_symbol, continuation_name(obj)));
       return(internal_inlet(sc, 4, sc->value_symbol, obj, sc->type_symbol, sc->is_continuation_symbol));
 
     case T_INPUT_PORT: case T_OUTPUT_PORT:
@@ -51320,8 +51320,8 @@ static s7_pointer stacktrace_find_caller(s7_scheme *sc, s7_pointer e)
 static bool stacktrace_find_let(s7_scheme *sc, int64_t loc, s7_pointer e)
 {
   return((loc > 0) &&
-	 ((stack_let(sc->stack, loc) == e) ||
-	  (stacktrace_find_let(sc, loc - 4, e))));
+         ((stack_let(sc->stack, loc) == e) ||
+          (stacktrace_find_let(sc, loc - 4, e))));
 }
 
 static int64_t stacktrace_find_error_hook_quit(s7_scheme *sc)
@@ -51335,8 +51335,8 @@ static int64_t stacktrace_find_error_hook_quit(s7_scheme *sc)
 static bool stacktrace_in_error_handler(s7_scheme *sc, int64_t loc)
 {
   return((let_outlet(sc->owlet) == sc->curlet) ||
-	 (stacktrace_find_let(sc, loc * 4, let_outlet(sc->owlet))) ||
-	 (stacktrace_find_error_hook_quit(sc) > 0));
+         (stacktrace_find_let(sc, loc * 4, let_outlet(sc->owlet))) ||
+         (stacktrace_find_error_hook_quit(sc) > 0));
 }
 
 static bool stacktrace_error_hook_function(s7_scheme *sc, s7_pointer sym)
@@ -51345,98 +51345,98 @@ static bool stacktrace_error_hook_function(s7_scheme *sc, s7_pointer sym)
     {
       s7_pointer f = s7_symbol_value(sc, sym);
       return((is_procedure(f)) &&
-	     (hook_has_functions(sc->error_hook)) &&
-	     (direct_memq(f, s7_hook_functions(sc, sc->error_hook))));
+             (hook_has_functions(sc->error_hook)) &&
+             (direct_memq(f, s7_hook_functions(sc, sc->error_hook))));
     }
   return(false);
 }
 
 static char *stacktrace_walker(s7_scheme *sc, s7_pointer code, s7_pointer e, char *notes,
-			       s7_int code_cols, s7_int total_cols, s7_int notes_start_col,
-			       bool as_comment, int32_t depth)
+                               s7_int code_cols, s7_int total_cols, s7_int notes_start_col,
+                               bool as_comment, int32_t depth)
 {
   if (is_symbol(code))
     {
       if ((!symbol_is_in_list(sc, code)) &&
-	  (!is_slot(global_slot(code))))
-	{
-	  s7_pointer val;
-	  add_symbol_to_list(sc, code);
-	  val = s7_symbol_local_value(sc, code, e);
-	  if ((val) &&
-	      (val != sc->undefined) &&
-	      (!is_any_macro(val)))
-	    {
-	      int32_t typ = type(val);
-	      if (typ < T_CONTINUATION)
-		{
-		  char *objstr, *str;
-		  s7_pointer objp;
-		  s7_int new_note_len, notes_max;
-		  bool new_notes_line = false, old_short_print = sc->short_print;
-		  s7_int old_len = sc->print_length, objlen;
-
-		  if (notes_start_col < 0) notes_start_col = 50;
-		  if (notes_start_col > total_cols) notes_start_col = 0;
-		  notes_max = total_cols - notes_start_col;
-		  sc->short_print = true;
-		  if (sc->print_length > 4) sc->print_length = 4;
-		  objp = s7_object_to_string(sc, val, true);
-		  objstr = string_value(objp);
-		  objlen = string_length(objp);
-		  if ((objlen > notes_max) &&
-		      (notes_max > 5))
-		    {
-		      objstr[notes_max - 4] = '.';
-		      objstr[notes_max - 3] = '.';
-		      objstr[notes_max - 2] = '.';
-		      objstr[notes_max - 1] = '\0';
-		      objlen = notes_max;
-		    }
-		  sc->short_print = old_short_print;
-		  sc->print_length = old_len;
-
-		  new_note_len = symbol_name_length(code) + 3 + objlen;
-		  /* we want to append this much info to the notes, but does it need a new line? */
-		  if (notes_start_col < code_cols)
-		    new_notes_line = true;
-		  else
-		    if (notes)
-		      {
-			char *last_newline = strrchr(notes, (int)'\n'); /* returns ptr to end if none = nil if not found? */
-			s7_int cur_line_len = (last_newline) ? (strlen(notes) - strlen(last_newline)) : strlen(notes);
-			new_notes_line = ((cur_line_len + new_note_len) > notes_max);
-		      }
-		  if (new_notes_line)
-		    {
-		      const char *spaces = "                                                                                ";
-		      s7_int spaces_len = 80;
-		      new_note_len += (4 + notes_start_col + ((notes) ? strlen(notes) : 0));
-		      str = (char *)Malloc(new_note_len);   /* str[0] = '\0'; */
-		      catstrs_direct(str,
-			      (notes) ? notes : "",
-			      "\n",
-			      (as_comment) ? "; " : "",
-			      (spaces_len >= notes_start_col) ? (const char *)(spaces + spaces_len - notes_start_col) : "",
-			      (as_comment) ? "" : " ; ",
-			      symbol_name(code),
-			      ": ",
-			      objstr, (const char *)NULL);
-		    }
-		  else
-		    {
-		      new_note_len += ((notes) ? strlen(notes) : 0) + 4;
-		      str = (char *)Malloc(new_note_len);   /* str[0] = '\0'; */
-		      catstrs_direct(str,
-			      (notes) ? notes : "",
-			      (notes) ? ", " : " ; ",
-			      symbol_name(code),
-			      ": ",
-			      objstr, (const char *)NULL);
-		    }
-		  if (notes) free(notes);
-		  return(str);
-		}}}
+          (!is_slot(global_slot(code))))
+        {
+          s7_pointer val;
+          add_symbol_to_list(sc, code);
+          val = s7_symbol_local_value(sc, code, e);
+          if ((val) &&
+              (val != sc->undefined) &&
+              (!is_any_macro(val)))
+            {
+              int32_t typ = type(val);
+              if (typ < T_CONTINUATION)
+                {
+                  char *objstr, *str;
+                  s7_pointer objp;
+                  s7_int new_note_len, notes_max;
+                  bool new_notes_line = false, old_short_print = sc->short_print;
+                  s7_int old_len = sc->print_length, objlen;
+
+                  if (notes_start_col < 0) notes_start_col = 50;
+                  if (notes_start_col > total_cols) notes_start_col = 0;
+                  notes_max = total_cols - notes_start_col;
+                  sc->short_print = true;
+                  if (sc->print_length > 4) sc->print_length = 4;
+                  objp = s7_object_to_string(sc, val, true);
+                  objstr = string_value(objp);
+                  objlen = string_length(objp);
+                  if ((objlen > notes_max) &&
+                      (notes_max > 5))
+                    {
+                      objstr[notes_max - 4] = '.';
+                      objstr[notes_max - 3] = '.';
+                      objstr[notes_max - 2] = '.';
+                      objstr[notes_max - 1] = '\0';
+                      objlen = notes_max;
+                    }
+                  sc->short_print = old_short_print;
+                  sc->print_length = old_len;
+
+                  new_note_len = symbol_name_length(code) + 3 + objlen;
+                  /* we want to append this much info to the notes, but does it need a new line? */
+                  if (notes_start_col < code_cols)
+                    new_notes_line = true;
+                  else
+                    if (notes)
+                      {
+                        char *last_newline = strrchr(notes, (int)'\n'); /* returns ptr to end if none = nil if not found? */
+                        s7_int cur_line_len = (last_newline) ? (strlen(notes) - strlen(last_newline)) : strlen(notes);
+                        new_notes_line = ((cur_line_len + new_note_len) > notes_max);
+                      }
+                  if (new_notes_line)
+                    {
+                      const char *spaces = "                                                                                ";
+                      s7_int spaces_len = 80;
+                      new_note_len += (4 + notes_start_col + ((notes) ? strlen(notes) : 0));
+                      str = (char *)Malloc(new_note_len);   /* str[0] = '\0'; */
+                      catstrs_direct(str,
+                              (notes) ? notes : "",
+                              "\n",
+                              (as_comment) ? "; " : "",
+                              (spaces_len >= notes_start_col) ? (const char *)(spaces + spaces_len - notes_start_col) : "",
+                              (as_comment) ? "" : " ; ",
+                              symbol_name(code),
+                              ": ",
+                              objstr, (const char *)NULL);
+                    }
+                  else
+                    {
+                      new_note_len += ((notes) ? strlen(notes) : 0) + 4;
+                      str = (char *)Malloc(new_note_len);   /* str[0] = '\0'; */
+                      catstrs_direct(str,
+                              (notes) ? notes : "",
+                              (notes) ? ", " : " ; ",
+                              symbol_name(code),
+                              ": ",
+                              objstr, (const char *)NULL);
+                    }
+                  if (notes) free(notes);
+                  return(str);
+                }}}
       return(notes);
     }
   if ((is_pair(code)) &&
@@ -51470,10 +51470,10 @@ static block_t *stacktrace_add_func(s7_scheme *sc, s7_pointer f, s7_pointer code
       if ((errlen > 2) && (errstr[2] == '('))
         errlen = catstrs_direct(newstr, "  ", errstr, (const char *)NULL);
       else
-	{
-	  memcpy((void *)newstr, (const void *)errstr, errlen);
-	  newstr[errlen] = '\0';
-	}}
+        {
+          memcpy((void *)newstr, (const void *)errstr, errlen);
+          newstr[errlen] = '\0';
+        }}
   newlen = code_max + 8 + ((notes) ? strlen(notes) : 0);
   b = mallocate(sc, newlen);
   str = (char *)block_data(b);                /* str[0] = '\0'; */
@@ -51491,12 +51491,12 @@ static block_t *stacktrace_add_func(s7_scheme *sc, s7_pointer f, s7_pointer code
       /* send out newstr, pad with spaces to code_max, then notes */
       s7_int len = catstrs_direct(str, (as_comment) ? "; " : "", newstr, (const char *)NULL);
       if (notes)
-	{
-	  s7_int i;
-	  for (i = len; i < code_max - 1; i++) str[i] = ' ';
-	  str[i] = '\0';
-	  catstrs(str, newlen, notes, "\n", (char *)NULL);
-	}
+        {
+          s7_int i;
+          for (i = len; i < code_max - 1; i++) str[i] = ' ';
+          str[i] = '\0';
+          catstrs(str, newlen, notes, "\n", (char *)NULL);
+        }
       else catstrs(str, newlen, "\n", (char *)NULL);
     }
   liberate(sc, newp);
@@ -51515,20 +51515,20 @@ static s7_pointer stacktrace_1(s7_scheme *sc, s7_int frames_max, s7_int code_col
     {
       s7_pointer err_code = slot_value(sc->error_code);
       if ((is_pair(err_code)) &&
-	  (!tree_is_cyclic(sc, err_code)))
-	{
-	  char *notes = NULL;
-	  s7_pointer current_let = let_outlet(sc->owlet);
-	  s7_pointer errstr = s7_object_to_string(sc, err_code, false);
-	  s7_pointer f = stacktrace_find_caller(sc, current_let); /* this is a symbol */
-	  if ((is_let(current_let)) &&
-	      (current_let != sc->rootlet))
-	    notes = stacktrace_walker(sc, err_code, current_let, NULL, code_cols, total_cols, notes_start_col, as_comment, 0);
-	  strp = stacktrace_add_func(sc, f, err_code, string_value(errstr), notes, code_cols, as_comment);
-	  str = (char *)block_data(strp);
-	  if ((S7_DEBUGGING) && (notes == str)) fprintf(stderr, "%s[%d]: notes==str\n", __func__, __LINE__);
-	  if (notes) free(notes); /* copied into strp, 29-Sep-23 -- see below: maybe check that notes!=str? */
-	}
+          (!tree_is_cyclic(sc, err_code)))
+        {
+          char *notes = NULL;
+          s7_pointer current_let = let_outlet(sc->owlet);
+          s7_pointer errstr = s7_object_to_string(sc, err_code, false);
+          s7_pointer f = stacktrace_find_caller(sc, current_let); /* this is a symbol */
+          if ((is_let(current_let)) &&
+              (current_let != sc->rootlet))
+            notes = stacktrace_walker(sc, err_code, current_let, NULL, code_cols, total_cols, notes_start_col, as_comment, 0);
+          strp = stacktrace_add_func(sc, f, err_code, string_value(errstr), notes, code_cols, as_comment);
+          str = (char *)block_data(strp);
+          if ((S7_DEBUGGING) && (notes == str)) fprintf(stderr, "%s[%d]: notes==str\n", __func__, __LINE__);
+          if (notes) free(notes); /* copied into strp, 29-Sep-23 -- see below: maybe check that notes!=str? */
+        }
       loc = stacktrace_find_error_hook_quit(sc); /* if OP_ERROR_HOOK_QUIT is in the stack, jump past it! */
       if (loc > 0) top = (loc + 1) / 4;
     }
@@ -51537,57 +51537,57 @@ static s7_pointer stacktrace_1(s7_scheme *sc, s7_int frames_max, s7_int code_col
       s7_int true_loc = (loc + 1) * 4 - 1;
       s7_pointer code = stack_code(sc->stack, true_loc);
       if ((is_pair(code)) &&
-	  (!tree_is_cyclic(sc, code)))
-	{
-	  s7_pointer codep = s7_object_to_string(sc, code, false);
-	  if (string_length(codep) > 0)
-	    {
-	      char *codestr = string_value(codep);
-	      if ((!local_strcmp(codestr, "(result)")) &&
-		  (!local_strcmp(codestr, "(#f)")) &&
-		  (!strstr(codestr, "(stacktrace)")) &&
-		  (!strstr(codestr, "(stacktrace ")))
-		{
-		  s7_pointer e = stack_let(sc->stack, true_loc); /* might not be let (gc stack protection etc) */
-		  s7_pointer f = stacktrace_find_caller(sc, e);
-		  if (!stacktrace_error_hook_function(sc, f))
-		    {
-		      char *notes = NULL, *newstr, *catstr;
-		      block_t *newp, *catp;
-		      s7_int newlen;
-
-		      frames++;
-		      if (frames > frames_max)
-			return(block_to_string(sc, strp, safe_strlen((char *)block_data(strp))));
-
-		      if ((is_let(e)) && (e != sc->rootlet))
-			notes = stacktrace_walker(sc, code, e, NULL, code_cols, total_cols, notes_start_col, as_comment, 0);
-		      newp = stacktrace_add_func(sc, f, code, codestr, notes, code_cols, as_comment);
-		      newstr = (char *)block_data(newp);
-		      if ((S7_DEBUGGING) && (notes == newstr)) fprintf(stderr, "%s[%d]: notes=newstr\n", __func__, __LINE__);
-		      if ((notes) && (notes != newstr) && (is_let(e)) && (e != sc->rootlet))
-			free(notes);
-
-		      newlen = strlen(newstr) + 1 + ((str) ? strlen(str) : 0);
-		      catp = mallocate(sc, newlen);
-		      catstr = (char *)block_data(catp);
-		      catstrs_direct(catstr, (str) ? str : "", newstr, (const char *)NULL);
-		      liberate(sc, newp);
-		      if (strp) liberate(sc, strp);
-		      strp = catp;
-		      str = (char *)block_data(strp);
-		    }}}}}
+          (!tree_is_cyclic(sc, code)))
+        {
+          s7_pointer codep = s7_object_to_string(sc, code, false);
+          if (string_length(codep) > 0)
+            {
+              char *codestr = string_value(codep);
+              if ((!local_strcmp(codestr, "(result)")) &&
+                  (!local_strcmp(codestr, "(#f)")) &&
+                  (!strstr(codestr, "(stacktrace)")) &&
+                  (!strstr(codestr, "(stacktrace ")))
+                {
+                  s7_pointer e = stack_let(sc->stack, true_loc); /* might not be let (gc stack protection etc) */
+                  s7_pointer f = stacktrace_find_caller(sc, e);
+                  if (!stacktrace_error_hook_function(sc, f))
+                    {
+                      char *notes = NULL, *newstr, *catstr;
+                      block_t *newp, *catp;
+                      s7_int newlen;
+
+                      frames++;
+                      if (frames > frames_max)
+                        return(block_to_string(sc, strp, safe_strlen((char *)block_data(strp))));
+
+                      if ((is_let(e)) && (e != sc->rootlet))
+                        notes = stacktrace_walker(sc, code, e, NULL, code_cols, total_cols, notes_start_col, as_comment, 0);
+                      newp = stacktrace_add_func(sc, f, code, codestr, notes, code_cols, as_comment);
+                      newstr = (char *)block_data(newp);
+                      if ((S7_DEBUGGING) && (notes == newstr)) fprintf(stderr, "%s[%d]: notes=newstr\n", __func__, __LINE__);
+                      if ((notes) && (notes != newstr) && (is_let(e)) && (e != sc->rootlet))
+                        free(notes);
+
+                      newlen = strlen(newstr) + 1 + ((str) ? strlen(str) : 0);
+                      catp = mallocate(sc, newlen);
+                      catstr = (char *)block_data(catp);
+                      catstrs_direct(catstr, (str) ? str : "", newstr, (const char *)NULL);
+                      liberate(sc, newp);
+                      if (strp) liberate(sc, strp);
+                      strp = catp;
+                      str = (char *)block_data(strp);
+                    }}}}}
   return((strp) ? block_to_string(sc, strp, safe_strlen((char *)block_data(strp))) : nil_string);
 }
 
 s7_pointer s7_stacktrace(s7_scheme *sc)
 {
   return(stacktrace_1(sc,
-		      s7_integer_clamped_if_gmp(sc, car(sc->stacktrace_defaults)),
-		      s7_integer_clamped_if_gmp(sc, cadr(sc->stacktrace_defaults)),
-		      s7_integer_clamped_if_gmp(sc, caddr(sc->stacktrace_defaults)),
-		      s7_integer_clamped_if_gmp(sc, cadddr(sc->stacktrace_defaults)),
-		      s7_boolean(sc, s7_list_ref(sc, sc->stacktrace_defaults, 4))));
+                      s7_integer_clamped_if_gmp(sc, car(sc->stacktrace_defaults)),
+                      s7_integer_clamped_if_gmp(sc, cadr(sc->stacktrace_defaults)),
+                      s7_integer_clamped_if_gmp(sc, caddr(sc->stacktrace_defaults)),
+                      s7_integer_clamped_if_gmp(sc, cadddr(sc->stacktrace_defaults)),
+                      s7_boolean(sc, s7_list_ref(sc, sc->stacktrace_defaults, 4))));
 }
 
 static s7_pointer g_stacktrace(s7_scheme *sc, s7_pointer args)
@@ -51607,41 +51607,41 @@ line to be preceded by a semicolon."
   if (!is_null(args))
     {
       if (!s7_is_integer(car(args)))
-	return(method_or_bust(sc, car(args), sc->stacktrace_symbol, args, sc->type_names[T_INTEGER], 1));
+        return(method_or_bust(sc, car(args), sc->stacktrace_symbol, args, sc->type_names[T_INTEGER], 1));
       max_frames = s7_integer_clamped_if_gmp(sc, car(args));
       if ((max_frames <= 0) || (max_frames > S7_INT32_MAX))
-	max_frames = 30;
+        max_frames = 30;
       args = cdr(args);
       if (!is_null(args))
-	{
-	  if (!s7_is_integer(car(args)))
-	    wrong_type_error_nr(sc, sc->stacktrace_symbol, 2, car(args), sc->type_names[T_INTEGER]);
-	  code_cols = s7_integer_clamped_if_gmp(sc, car(args));
-	  if ((code_cols <= 8) || (code_cols > 1024))
-	    code_cols = 50;
-	  args = cdr(args);
-	  if (!is_null(args))
-	    {
-	      if (!s7_is_integer(car(args)))
-		wrong_type_error_nr(sc, sc->stacktrace_symbol, 3, car(args), sc->type_names[T_INTEGER]);
-	      total_cols = s7_integer_clamped_if_gmp(sc, car(args));
-	      if ((total_cols <= code_cols) || (total_cols > S7_INT32_MAX))
-		total_cols = 80;
-	      args = cdr(args);
-	      if (!is_null(args))
-		{
-		  if (!s7_is_integer(car(args)))
-		    wrong_type_error_nr(sc, sc->stacktrace_symbol, 4, car(args), sc->type_names[T_INTEGER]);
-		  notes_start_col = s7_integer_clamped_if_gmp(sc, car(args));
-		  if ((notes_start_col <= 0) || (notes_start_col > S7_INT32_MAX))
-		    notes_start_col = 50;
-		  args = cdr(args);
-		  if (!is_null(args))
-		    {
-		      if (!is_boolean(car(args)))
-			wrong_type_error_nr(sc, sc->stacktrace_symbol, 5, car(args), sc->type_names[T_BOOLEAN]);
-		      as_comment = s7_boolean(sc, car(args));
-		    }}}}}
+        {
+          if (!s7_is_integer(car(args)))
+            wrong_type_error_nr(sc, sc->stacktrace_symbol, 2, car(args), sc->type_names[T_INTEGER]);
+          code_cols = s7_integer_clamped_if_gmp(sc, car(args));
+          if ((code_cols <= 8) || (code_cols > 1024))
+            code_cols = 50;
+          args = cdr(args);
+          if (!is_null(args))
+            {
+              if (!s7_is_integer(car(args)))
+                wrong_type_error_nr(sc, sc->stacktrace_symbol, 3, car(args), sc->type_names[T_INTEGER]);
+              total_cols = s7_integer_clamped_if_gmp(sc, car(args));
+              if ((total_cols <= code_cols) || (total_cols > S7_INT32_MAX))
+                total_cols = 80;
+              args = cdr(args);
+              if (!is_null(args))
+                {
+                  if (!s7_is_integer(car(args)))
+                    wrong_type_error_nr(sc, sc->stacktrace_symbol, 4, car(args), sc->type_names[T_INTEGER]);
+                  notes_start_col = s7_integer_clamped_if_gmp(sc, car(args));
+                  if ((notes_start_col <= 0) || (notes_start_col > S7_INT32_MAX))
+                    notes_start_col = 50;
+                  args = cdr(args);
+                  if (!is_null(args))
+                    {
+                      if (!is_boolean(car(args)))
+                        wrong_type_error_nr(sc, sc->stacktrace_symbol, 5, car(args), sc->type_names[T_BOOLEAN]);
+                      as_comment = s7_boolean(sc, car(args));
+                    }}}}}
   return(stacktrace_1(sc, max_frames, code_cols, total_cols, notes_start_col, as_comment));
 }
 
@@ -51683,8 +51683,8 @@ bool s7_set_history_enabled(s7_scheme *sc, bool enabled)
   else
     if (sc->cur_code != sc->history_sink)
       {
-	sc->old_cur_code = sc->cur_code;
-	sc->cur_code = sc->history_sink;
+        sc->old_cur_code = sc->cur_code;
+        sc->cur_code = sc->history_sink;
       }
   return(old_enabled);
 #else
@@ -51775,66 +51775,66 @@ static s7_pointer g_profile_in(s7_scheme *sc, s7_pointer args) /* only external
       profile_data_t *pd = sc->profile_data;
 
       if (pos >= pd->size)
-	{
-	  s7_int new_size = 2 * pos;
-	  pd->funcs = (s7_pointer *)Realloc(pd->funcs, new_size * sizeof(s7_pointer));
-	  memclr((void *)(pd->funcs + pd->size), (new_size - pd->size) * sizeof(s7_pointer));
-	  pd->timing_data = (s7_int *)Realloc(pd->timing_data, new_size * PD_BLOCK_SIZE * sizeof(s7_int));
+        {
+          s7_int new_size = 2 * pos;
+          pd->funcs = (s7_pointer *)Realloc(pd->funcs, new_size * sizeof(s7_pointer));
+          memclr((void *)(pd->funcs + pd->size), (new_size - pd->size) * sizeof(s7_pointer));
+          pd->timing_data = (s7_int *)Realloc(pd->timing_data, new_size * PD_BLOCK_SIZE * sizeof(s7_int));
           memclr((void *)(pd->timing_data + (pd->size * PD_BLOCK_SIZE)), (new_size - pd->size) * PD_BLOCK_SIZE * sizeof(s7_int));
-	  pd->let_names = (s7_pointer *)Realloc(pd->let_names, new_size * sizeof(s7_pointer));
-	  memclr((void *)(pd->let_names + pd->size), (new_size - pd->size) * sizeof(s7_pointer));
-	  pd->files = (s7_pointer *)Realloc(pd->files, new_size * sizeof(s7_pointer));
-	  memclr((void *)(pd->files + pd->size), (new_size - pd->size) * sizeof(s7_pointer));
-	  pd->lines = (s7_int *)Realloc(pd->lines, new_size * sizeof(s7_int));
-	  memclr((void *)(pd->lines + pd->size), (new_size - pd->size) * sizeof(s7_int));
-	  pd->size = new_size;
-	}
+          pd->let_names = (s7_pointer *)Realloc(pd->let_names, new_size * sizeof(s7_pointer));
+          memclr((void *)(pd->let_names + pd->size), (new_size - pd->size) * sizeof(s7_pointer));
+          pd->files = (s7_pointer *)Realloc(pd->files, new_size * sizeof(s7_pointer));
+          memclr((void *)(pd->files + pd->size), (new_size - pd->size) * sizeof(s7_pointer));
+          pd->lines = (s7_int *)Realloc(pd->lines, new_size * sizeof(s7_int));
+          memclr((void *)(pd->lines + pd->size), (new_size - pd->size) * sizeof(s7_int));
+          pd->size = new_size;
+        }
       if (pd->funcs[pos] == NULL)
-	{
-	  pd->funcs[pos] = func_name;
-	  if (is_gensym(func_name)) sc->profiling_gensyms = true;
-	  if (pos >= pd->top) pd->top = (pos + 1);
-
-	  /* perhaps add_profile needs to reuse ints if file/line exists? */
-	  if (is_symbol(sc->profile_prefix))
-	    {
-	      s7_pointer let_name = s7_symbol_local_value(sc, sc->profile_prefix, e);
-	      if (is_symbol(let_name)) pd->let_names[pos] = let_name;
-	    }
-	  if (has_let_file(e))
-	    {
-	      pd->files[pos] = sc->file_names[let_file(e)];
-	      pd->lines[pos] = let_line(e);
-	    }}
+        {
+          pd->funcs[pos] = func_name;
+          if (is_gensym(func_name)) sc->profiling_gensyms = true;
+          if (pos >= pd->top) pd->top = (pos + 1);
+
+          /* perhaps add_profile needs to reuse ints if file/line exists? */
+          if (is_symbol(sc->profile_prefix))
+            {
+              s7_pointer let_name = s7_symbol_local_value(sc, sc->profile_prefix, e);
+              if (is_symbol(let_name)) pd->let_names[pos] = let_name;
+            }
+          if (has_let_file(e))
+            {
+              pd->files[pos] = sc->file_names[let_file(e)];
+              pd->lines[pos] = let_line(e);
+            }}
       v = (s7_int *)(sc->profile_data->timing_data + (pos * PD_BLOCK_SIZE));
       v[PD_CALLS]++;
       if (v[PD_RECUR] == 0)
-	{
-	  v[PD_START] = my_clock();
-	  pd->excl_top++;
-	  if (pd->excl_top == pd->excl_size)
-	    {
-	      pd->excl_size *= 2;
-	      pd->excl = (s7_int *)Realloc(pd->excl, pd->excl_size * sizeof(s7_int));
-	    }
-	  pd->excl[pd->excl_top] = 0;
-	}
+        {
+          v[PD_START] = my_clock();
+          pd->excl_top++;
+          if (pd->excl_top == pd->excl_size)
+            {
+              pd->excl_size *= 2;
+              pd->excl = (s7_int *)Realloc(pd->excl, pd->excl_size * sizeof(s7_int));
+            }
+          pd->excl[pd->excl_top] = 0;
+        }
       v[PD_RECUR]++;
 
       /* this doesn't work in "continuation passing" code (e.g. cpstak.scm in the so-called standard benchmarks).
        *   swap_stack pushes dynamic_unwind, but we don't pop back to it, so the stack grows to the recursion depth.
        */
       if (sc->stack_end >= sc->stack_resize_trigger)
-	{
-	  #define PROFILE_MAX_STACK_SIZE 10000000  /* around 5G counting lets/arglists/slots, maybe an *s7* field for this? */
-	  if (sc->stack_size > PROFILE_MAX_STACK_SIZE)
-	    error_nr(sc, make_symbol(sc, "stack-too-big", 13),
-		     set_elist_2(sc, wrap_string(sc, "profiling stack size has grown past ~D", 38), wrap_integer(sc, PROFILE_MAX_STACK_SIZE)));
-	  /* rather than raise an error, we could unwind the stack here, popping off all unwind entries, but this is
-	   *   a very rare problem, and the results will be confusing anyway.
-	   */
-	  resize_stack(sc);
-	}
+        {
+          #define PROFILE_MAX_STACK_SIZE 10000000  /* around 5G counting lets/arglists/slots, maybe an *s7* field for this? */
+          if (sc->stack_size > PROFILE_MAX_STACK_SIZE)
+            error_nr(sc, make_symbol(sc, "stack-too-big", 13),
+                     set_elist_2(sc, wrap_string(sc, "profiling stack size has grown past ~D", 38), wrap_integer(sc, PROFILE_MAX_STACK_SIZE)));
+          /* rather than raise an error, we could unwind the stack here, popping off all unwind entries, but this is
+           *   a very rare problem, and the results will be confusing anyway.
+           */
+          resize_stack(sc);
+        }
       swap_stack(sc, OP_DYNAMIC_UNWIND_PROFILE, sc->profile_out, car(args));
     }
   return(sc->F);
@@ -51860,13 +51860,13 @@ static s7_pointer profile_info_out(s7_scheme *sc)
   for (i = 0; i < pd->top; i++)
     {
       if (pd->funcs[i])
-	{
-	  vector_element(vs, i) = pd->funcs[i];
-	  if ((is_matched_symbol(pd->funcs[i])) && /* find ambiguous names */
-	      (!direct_memq(pd->funcs[i], car(matches))))
-	    set_car(matches, cons(sc, pd->funcs[i], car(matches)));
-	  set_match_symbol(pd->funcs[i]);
-	}
+        {
+          vector_element(vs, i) = pd->funcs[i];
+          if ((is_matched_symbol(pd->funcs[i])) && /* find ambiguous names */
+              (!direct_memq(pd->funcs[i], car(matches))))
+            set_car(matches, cons(sc, pd->funcs[i], car(matches)));
+          set_match_symbol(pd->funcs[i]);
+        }
       else vector_element(vs, i) = sc->F;
       vector_element(vn, i) = (!pd->let_names[i]) ? sc->F : pd->let_names[i];
       vector_element(vf, i) = (!pd->files[i]) ? sc->F : pd->files[i];
@@ -51890,7 +51890,7 @@ static s7_pointer clear_profile_info(s7_scheme *sc)
       memclr(pd->lines, pd->top * sizeof(s7_int));
       pd->top = 0;
       for (int32_t i = 0; i < pd->excl_top; i++)
-	pd->excl[i] = 0;
+        pd->excl[i] = 0;
       pd->excl_top = 0;
       sc->profiling_gensyms = false;
     }
@@ -51962,21 +51962,21 @@ static s7_pointer g_catch(s7_scheme *sc, s7_pointer args)
 
   if (!is_pair(cdr(args))) /* (let ((mlet (openlet (inlet 'abs catch)))) (abs mlet)) -- this is a special case, avoid calling this everywhere */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_2(sc, wrap_string(sc, "catch: function missing: ~S", 27), set_ulist_1(sc, sc->catch_symbol, args)));
+             set_elist_2(sc, wrap_string(sc, "catch: function missing: ~S", 27), set_ulist_1(sc, sc->catch_symbol, args)));
   proc = cadr(args);
   if (!is_thunk(sc, proc))
     {
       if (is_any_procedure(proc))        /* i.e. c_function, lambda, macro, etc */
-	{
-	  s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
-	  error_nr(sc, sc->wrong_type_arg_symbol,
-		   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but catch's second argument should be a thunk", 72), proc, req_args, req_args));
-	}
+        {
+          s7_pointer req_args = wrap_integer(sc, procedure_required_args(sc, proc));
+          error_nr(sc, sc->wrong_type_arg_symbol,
+                   set_elist_4(sc, wrap_string(sc, "~A requires ~D argument~P, but catch's second argument should be a thunk", 72), proc, req_args, req_args));
+        }
       else wrong_type_error_nr(sc, sc->catch_symbol, 2, proc, a_thunk_string);
     }
   if (!is_pair(cddr(args))) 
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_2(sc, wrap_string(sc, "catch: error handler missing: ~S", 32), set_ulist_1(sc, sc->catch_symbol, args)));
+             set_elist_2(sc, wrap_string(sc, "catch: error handler missing: ~S", 32), set_ulist_1(sc, sc->catch_symbol, args)));
   err = caddr(args);
   if (!is_applicable(err))
     wrong_type_error_nr(sc, sc->catch_symbol, 3, err, something_applicable_string);
@@ -51999,7 +51999,7 @@ static s7_pointer g_catch(s7_scheme *sc, s7_pointer args)
        */
       sc->code = closure_body(proc);
       if (is_symbol(closure_args(proc)))
-	set_curlet(sc, make_let_with_slot(sc, closure_let(proc), closure_args(proc), sc->nil));
+        set_curlet(sc, make_let_with_slot(sc, closure_let(proc), closure_args(proc), sc->nil));
       else set_curlet(sc, inline_make_let(sc, closure_let(proc)));
       push_stack_no_args_direct(sc, sc->begin_op);
     }
@@ -52030,22 +52030,22 @@ s7_pointer s7_call_with_catch(s7_scheme *sc, s7_pointer tag, s7_pointer body, s7
     if (SHOW_EVAL_OPS) fprintf(stderr, "jump_loc: %s\n", jump_string[(int)jump_loc]);
     if (jump_loc == NO_JUMP)
       {
-	catch_cstack(p) = &new_goto_start;
-	if (SHOW_EVAL_OPS) fprintf(stderr, "  longjmp call %s\n", display_truncated(body));
-	push_stack(sc, OP_CATCH, error_handler, p);
-	result = s7_call(sc, body, sc->nil);
-	if (stack_top_op(sc) == OP_CATCH) sc->stack_end -= 4;
+        catch_cstack(p) = &new_goto_start;
+        if (SHOW_EVAL_OPS) fprintf(stderr, "  longjmp call %s\n", display_truncated(body));
+        push_stack(sc, OP_CATCH, error_handler, p);
+        result = s7_call(sc, body, sc->nil);
+        if (stack_top_op(sc) == OP_CATCH) sc->stack_end -= 4;
       }
     else
       {
-	if (SHOW_EVAL_OPS) fprintf(stderr, "  jump back with %s (%d)\n", jump_string[(int)jump_loc], (sc->stack_end == sc->stack_start));
-	if (jump_loc != ERROR_JUMP)
-	  eval(sc, sc->cur_op);
-	if ((jump_loc == CATCH_JUMP) &&    /* we're returning from an error in catch */
-	    ((sc->stack_end == sc->stack_start) ||
-	     (((sc->stack_end - 4) == sc->stack_start) && (stack_top_op(sc) == OP_GC_PROTECT)))) /* s7_apply_function probably */
-	  push_stack_op(sc, OP_ERROR_QUIT);
-	result = sc->value;
+        if (SHOW_EVAL_OPS) fprintf(stderr, "  jump back with %s (%d)\n", jump_string[(int)jump_loc], (sc->stack_end == sc->stack_start));
+        if (jump_loc != ERROR_JUMP)
+          eval(sc, sc->cur_op);
+        if ((jump_loc == CATCH_JUMP) &&    /* we're returning from an error in catch */
+            ((sc->stack_end == sc->stack_start) ||
+             (((sc->stack_end - 4) == sc->stack_start) && (stack_top_op(sc) == OP_GC_PROTECT)))) /* s7_apply_function probably */
+          push_stack_op(sc, OP_ERROR_QUIT);
+        result = sc->value;
       }
     restore_jump_info(sc);
   }
@@ -52133,7 +52133,7 @@ static s7_pointer cull_history(s7_scheme *sc, s7_pointer code)
   for (s7_pointer p = code; is_pair(p); p = cdr(p))
     {
       if ((is_pair(car(p))) && (!is_quote(car(p))) && (pair_set_memq(sc, car(p))))
-	set_car(p, sc->nil);
+        set_car(p, sc->nil);
       if (cdr(p) == code) break;
     }
   return(code);
@@ -52168,28 +52168,28 @@ It has the additional local variables: error-type, error-data, error-code, error
   for (s7_pointer x = let_slots(e); tis_slot(x); x = next_slot(x))
     if (is_pair(slot_value(x)))
       {
-	s7_pointer new_list = copy_any_list(sc, slot_value(x));
-	slot_set_value(x, new_list);
-	for (s7_pointer p = new_list, sp = p; is_pair(p); p = cdr(p), sp = cdr(sp))
-	  {
-	    s7_pointer val = car(p);
-	    if (is_t_real(val))
-	      set_car(p, make_real(sc, real(val)));
-	    else
-	      if (is_string(val))
-		set_car(p, make_string_with_length(sc, string_value(val), string_length(val)));
-	      else
-		if (is_t_integer(val))
-		  set_car(p, make_integer(sc, integer(val)));
-	    p = cdr(p);
-	    if ((!is_pair(p)) || (p == sp)) break;
-	    val = car(p);
-	    if (is_t_real(val))
-	      set_car(p, make_real(sc, real(val)));
-	    else
-	      if (is_string(val))
-		set_car(p, make_string_with_length(sc, string_value(val), string_length(val)));
-	  }}
+        s7_pointer new_list = copy_any_list(sc, slot_value(x));
+        slot_set_value(x, new_list);
+        for (s7_pointer p = new_list, sp = p; is_pair(p); p = cdr(p), sp = cdr(sp))
+          {
+            s7_pointer val = car(p);
+            if (is_t_real(val))
+              set_car(p, make_real(sc, real(val)));
+            else
+              if (is_string(val))
+                set_car(p, make_string_with_length(sc, string_value(val), string_length(val)));
+              else
+                if (is_t_integer(val))
+                  set_car(p, make_integer(sc, integer(val)));
+            p = cdr(p);
+            if ((!is_pair(p)) || (p == sp)) break;
+            val = car(p);
+            if (is_t_real(val))
+              set_car(p, make_real(sc, real(val)));
+            else
+              if (is_string(val))
+                set_car(p, make_string_with_length(sc, string_value(val), string_length(val)));
+          }}
   sc->gc_off = old_gc;
   unstack_gc_protect(sc);
   return(e);
@@ -52230,7 +52230,7 @@ static bool catch_2_function(s7_scheme *sc, s7_int catch_loc, s7_pointer type, s
       sc->code = catch_handler(x);
       load_catch_cstack(sc, x);
       if (needs_copied_args(sc->code))
-	sc->args = list_2(sc, type, info);
+        sc->args = list_2(sc, type, info);
       else sc->args = with_list_t2(type, info); /* very unlikely: need c_macro as error catcher: (catch #t (lambda () (error 'oops)) require) */
       sc->cur_op = OP_APPLY;
       return(true);
@@ -52269,96 +52269,96 @@ static bool catch_1_function(s7_scheme *sc, s7_int catch_loc, s7_pointer type, s
 
       /* if OP_CATCH_1, we deferred making the error handler until it is actually needed */
       if (op == OP_CATCH_1)
-	{
-	  error_body = cdr(error_func);
-	  error_args = car(error_func);
-	}
+        {
+          error_body = cdr(error_func);
+          error_args = car(error_func);
+        }
       else
-	if (is_closure(error_func))
-	  {
-	    error_body = closure_body(error_func);
-	    error_args = closure_args(error_func);
-	  }
-	else
-	  {
-	    error_body = NULL;
-	    error_args = NULL;
-	  }
+        if (is_closure(error_func))
+          {
+            error_body = closure_body(error_func);
+            error_args = closure_args(error_func);
+          }
+        else
+          {
+            error_body = NULL;
+            error_args = NULL;
+          }
       if ((error_body) && (is_null(cdr(error_body))))
-	{
-	  s7_pointer y = NULL;
-	  error_body = car(error_body);
-	  if (is_pair(error_body))
-	    {
-	      if (is_quote(car(error_body)))
-		y = cadr(error_body);
-	      else
-		if ((car(error_body) == sc->car_symbol) &&
-		    (is_pair(cdr(error_body))) &&            /* catch: (lambda (type info) (car)) */
-		    (cadr(error_body) == error_args))
-		  y = type;
-	    }
-	  else
-	    if (!is_symbol(error_body))
-	      y = error_body; /* not pair or symbol */
-	    else
-	      if (error_body == error_args)
-		y = list_2(sc, type, info);
-	      else
-		if (is_keyword(error_body))
-		  y = error_body;
-		else
-		  if ((is_pair(error_args)) &&
-		      (error_body == car(error_args)))
-		    y = type;
-	  if (y)
-	    {
-	      if ((SHOW_EVAL_OPS) && (loc > 4)) {fprintf(stderr, "  about to pop_stack: \n"); s7_show_stack(sc);}
-	      if (loc > 4)
-		pop_stack(sc);
-	      /* we're at OP_CATCH, normally we want to pop that away, but (handwaving...) if we're coming
-	       *   from s7_eval (indirectly perhaps through s7_eval_c_string), we might push the OP_EVAL_DONE
-	       *   to end that call, but it's pushed at the precatch stack end (far beyond the catch loc).
-	       *   If we catch an error, catch unwinds to its starting point, and the pop_stack above
-	       *   puts us at the bottom of the stack (i.e. stack_end == stack_start), OP_EVAL_DONE.
-	       *   Now we return true, ending up back in eval, because the error handler jumped out of eval,
-	       *   back to wherever we were in eval when we hit the error.  eval jumps back to the start
-	       *   of its loop, and pops the stack to see what to do next!  So the (loc > 4) at least
-	       *   protects against stack underflow, but ideally we'd know we came from OP_CATCH+s7_eval.
-	       *   We can't do anything fancy here because we have to unwind the C stack as well as s7's stack.
-	       *   s7_eval doesn't know anything about the catches on the stack.  We can't look back for
-	       *   OP_EVAL_DONE -- segfault in OP_BEGIN.  Hmmmm.  Perhaps catch should not unwind until the
-	       *   end?  But we want the error handler to run as a part of the calling expression, and
-	       *   in any case the OP_EVAL_DONE is not useful (it marks the end of the no-error case).
-	       */
-	      sc->value = y;
-	      sc->y = sc->unused;
-	      sc->temp4 = sc->unused;
-	      sc->w = sc->unused;
-	      if (loc == 4)
-		sc->code = cons(sc, sc->value, sc->nil); /* if we end up at op_begin, give it something it can handle */
-	      return(true);
-	    }}
+        {
+          s7_pointer y = NULL;
+          error_body = car(error_body);
+          if (is_pair(error_body))
+            {
+              if (is_quote(car(error_body)))
+                y = cadr(error_body);
+              else
+                if ((car(error_body) == sc->car_symbol) &&
+                    (is_pair(cdr(error_body))) &&            /* catch: (lambda (type info) (car)) */
+                    (cadr(error_body) == error_args))
+                  y = type;
+            }
+          else
+            if (!is_symbol(error_body))
+              y = error_body; /* not pair or symbol */
+            else
+              if (error_body == error_args)
+                y = list_2(sc, type, info);
+              else
+                if (is_keyword(error_body))
+                  y = error_body;
+                else
+                  if ((is_pair(error_args)) &&
+                      (error_body == car(error_args)))
+                    y = type;
+          if (y)
+            {
+              if ((SHOW_EVAL_OPS) && (loc > 4)) {fprintf(stderr, "  about to pop_stack: \n"); s7_show_stack(sc);}
+              if (loc > 4)
+                pop_stack(sc);
+              /* we're at OP_CATCH, normally we want to pop that away, but (handwaving...) if we're coming
+               *   from s7_eval (indirectly perhaps through s7_eval_c_string), we might push the OP_EVAL_DONE
+               *   to end that call, but it's pushed at the precatch stack end (far beyond the catch loc).
+               *   If we catch an error, catch unwinds to its starting point, and the pop_stack above
+               *   puts us at the bottom of the stack (i.e. stack_end == stack_start), OP_EVAL_DONE.
+               *   Now we return true, ending up back in eval, because the error handler jumped out of eval,
+               *   back to wherever we were in eval when we hit the error.  eval jumps back to the start
+               *   of its loop, and pops the stack to see what to do next!  So the (loc > 4) at least
+               *   protects against stack underflow, but ideally we'd know we came from OP_CATCH+s7_eval.
+               *   We can't do anything fancy here because we have to unwind the C stack as well as s7's stack.
+               *   s7_eval doesn't know anything about the catches on the stack.  We can't look back for
+               *   OP_EVAL_DONE -- segfault in OP_BEGIN.  Hmmmm.  Perhaps catch should not unwind until the
+               *   end?  But we want the error handler to run as a part of the calling expression, and
+               *   in any case the OP_EVAL_DONE is not useful (it marks the end of the no-error case).
+               */
+              sc->value = y;
+              sc->y = sc->unused;
+              sc->temp4 = sc->unused;
+              sc->w = sc->unused;
+              if (loc == 4)
+                sc->code = cons(sc, sc->value, sc->nil); /* if we end up at op_begin, give it something it can handle */
+              return(true);
+            }}
       /* here type and info need to be GC protected (new_cell below), g_throw and error_nr, throw sc->w for type, but error_nr nothing currently */
       if (op == OP_CATCH_1)
-	{
-	  s7_pointer p;
-	  new_cell(sc, p, T_CLOSURE);
-	  closure_set_args(p, car(error_func));
-	  closure_set_body(p, cdr(error_func));
-	  closure_set_setter(p, sc->F);
-	  closure_set_arity(p, CLOSURE_ARITY_NOT_SET);
-	  closure_set_let(p, sc->temp4);
-	  sc->code = p;
-	  if ((S7_DEBUGGING) && (!s7_is_aritable(sc, sc->code, 2))) fprintf(stderr, "%s[%d]: errfunc not aritable(2)!\n", __func__, __LINE__);
-	}
+        {
+          s7_pointer p;
+          new_cell(sc, p, T_CLOSURE);
+          closure_set_args(p, car(error_func));
+          closure_set_body(p, cdr(error_func));
+          closure_set_setter(p, sc->F);
+          closure_set_arity(p, CLOSURE_ARITY_NOT_SET);
+          closure_set_let(p, sc->temp4);
+          sc->code = p;
+          if ((S7_DEBUGGING) && (!s7_is_aritable(sc, sc->code, 2))) fprintf(stderr, "%s[%d]: errfunc not aritable(2)!\n", __func__, __LINE__);
+        }
       else
-	{
-	  sc->code = error_func;
-	  sc->y = sc->unused;
-	  if (!s7_is_aritable(sc, sc->code, 2)) /* op_catch_1 from op_c_catch already checks this */
-	    wrong_number_of_arguments_error_nr(sc, "catch error handler should accept two arguments: ~S", 51, sc->code);
-	}
+        {
+          sc->code = error_func;
+          sc->y = sc->unused;
+          if (!s7_is_aritable(sc, sc->code, 2)) /* op_catch_1 from op_c_catch already checks this */
+            wrong_number_of_arguments_error_nr(sc, "catch error handler should accept two arguments: ~S", 51, sc->code);
+        }
       sc->temp4 = sc->unused;
       /* if user (i.e. yers truly!) copies/pastes the preceding lambda () into the
        *   error handler portion of the catch, he gets the inexplicable message:
@@ -52386,7 +52386,7 @@ static bool catch_dynamic_wind_function(s7_scheme *sc, s7_int catch_loc, s7_poin
     {
       dynamic_wind_state(x) = DWIND_FINISH;    /* make sure an uncaught error in the exit thunk doesn't cause us to loop */
       if (dynamic_wind_out(x) != sc->F)
-	sc->value = s7_call(sc, dynamic_wind_out(x), sc->nil);
+        sc->value = s7_call(sc, dynamic_wind_out(x), sc->nil);
     }
   return(false);
 }
@@ -52432,7 +52432,7 @@ static bool catch_barrier_function(s7_scheme *sc, s7_int catch_loc, s7_pointer t
   if (is_input_port(stack_args(sc->stack, catch_loc)))
     {
       if (current_input_port(sc) == stack_args(sc->stack, catch_loc))
-	pop_input_port(sc);
+        pop_input_port(sc);
       s7_close_input_port(sc, stack_args(sc->stack, catch_loc));
     }
   return(false);
@@ -52492,10 +52492,10 @@ static bool catch_let_temporarily_function(s7_scheme *sc, s7_int catch_loc, s7_p
 
       push_stack_direct(sc, OP_GC_PROTECT);
       if (!op_let_temp_done1(sc))
-	{
-	  push_stack_direct(sc, OP_EVAL_DONE);
-	  eval(sc, OP_SET_UNCHECKED);
-	}}
+        {
+          push_stack_direct(sc, OP_EVAL_DONE);
+          eval(sc, OP_SET_UNCHECKED);
+        }}
   else let_temp_done(sc, stack_args(sc->stack, catch_loc), T_Let(stack_let(sc->stack, catch_loc)));
   return(false);
 }
@@ -52538,7 +52538,7 @@ static bool catch_dynamic_unwind_function(s7_scheme *sc, s7_int catch_loc, s7_po
     {
       s7_pointer spaces = lookup_slot_with_let(sc, make_symbol(sc, "*debug-spaces*", 14), T_Let(stack_let(sc->stack, catch_loc)));
       if (is_slot(spaces))
-	slot_set_value(spaces, make_integer(sc, max_i_ii(0LL, integer(slot_value(spaces)) - 2))); /* should involve only small_ints */
+        slot_set_value(spaces, make_integer(sc, max_i_ii(0LL, integer(slot_value(spaces)) - 2))); /* should involve only small_ints */
     }
   return(false);
 }
@@ -52586,15 +52586,15 @@ It looks for an existing catch with a matching tag, and jumps to it if found.  O
     {
       catch_function_t catcher = catchers[stack_op(sc->stack, i)];
       if ((catcher) &&
-	  (catcher(sc, i, type, info, &ignored_flag)))
-	{
-	  if (sc->longjmp_ok) LongJmp(*(sc->goto_start), THROW_JUMP);
-	  return(sc->value);
-	}}
+          (catcher(sc, i, type, info, &ignored_flag)))
+        {
+          if (sc->longjmp_ok) LongJmp(*(sc->goto_start), THROW_JUMP);
+          return(sc->value);
+        }}
   if (is_let(car(args)))
     check_method(sc, car(args), sc->throw_symbol, args);
   error_nr(sc, make_symbol(sc, "uncaught-throw", 14),
-	   set_elist_3(sc, wrap_string(sc, "no catch found for (throw ~W~{~^ ~S~})", 38), type, info));
+           set_elist_3(sc, wrap_string(sc, "no catch found for (throw ~W~{~^ ~S~})", 38), type, info));
   return(sc->F);
 }
 
@@ -52617,9 +52617,9 @@ static void s7_warn(s7_scheme *sc, s7_int len, const char *ctrl, ...) /* len = m
       bytes = vsnprintf(str, len, ctrl, ap);
       va_end(ap);
       if (port_is_closed(current_error_port(sc)))
-	set_current_error_port(sc, sc->standard_error);
+        set_current_error_port(sc, sc->standard_error);
       if ((bytes > 0) && (current_error_port(sc) != sc->F))
-	port_write_string(current_error_port(sc))(sc, str, bytes, current_error_port(sc));
+        port_write_string(current_error_port(sc))(sc, str, bytes, current_error_port(sc));
       liberate(sc, b);
     }
 }
@@ -52683,40 +52683,40 @@ static noreturn void error_nr(s7_scheme *sc, s7_pointer type, s7_pointer info)
     {
       s7_int line = -1, file, position;
       if (has_location(cur_code))
-	{
-	  line = pair_line_number(cur_code);
-	  file = pair_file_number(cur_code);
-	  position = pair_position(cur_code);
-	}
+        {
+          line = pair_line_number(cur_code);
+          file = pair_file_number(cur_code);
+          position = pair_position(cur_code);
+        }
       else /* try to find a plausible line number! */
-	for (s7_pointer p = cur_code, sp = cur_code; is_pair(p); p = cdr(p), sp = cdr(sp))
-	  {
-	    if ((is_pair(car(p))) &&  /* what about p itself? */
-		(has_location(car(p))))
-	      {
-		line = pair_line_number(car(p));
-		file = pair_file_number(car(p));
-		position = pair_position(car(p));
-		break;
-	      }
-	    p = cdr(p);
-	    if ((!is_pair(p)) || (p == sp)) break;
-	    if ((is_pair(car(p))) &&
-		(has_location(car(p))))
-	      {
-		line = pair_line_number(car(p));
-		file = pair_file_number(car(p));
-		position = pair_position(car(p));
-		break;
-	      }}
+        for (s7_pointer p = cur_code, sp = cur_code; is_pair(p); p = cdr(p), sp = cdr(sp))
+          {
+            if ((is_pair(car(p))) &&  /* what about p itself? */
+                (has_location(car(p))))
+              {
+                line = pair_line_number(car(p));
+                file = pair_file_number(car(p));
+                position = pair_position(car(p));
+                break;
+              }
+            p = cdr(p);
+            if ((!is_pair(p)) || (p == sp)) break;
+            if ((is_pair(car(p))) &&
+                (has_location(car(p))))
+              {
+                line = pair_line_number(car(p));
+                file = pair_file_number(car(p));
+                position = pair_position(car(p));
+                break;
+              }}
       if ((line <= 0) || (file < 0))
-	fill_error_location(sc);
+        fill_error_location(sc);
       else
-	{
-	  set_integer(slot_value(sc->error_line), line);
-	  set_integer(slot_value(sc->error_position), position);
-	  slot_set_value(sc->error_file, sc->file_names[file]);
-	}}
+        {
+          set_integer(slot_value(sc->error_line), line);
+          set_integer(slot_value(sc->error_position), position);
+          slot_set_value(sc->error_file, sc->file_names[file]);
+        }}
   else fill_error_location(sc);
 
   /* look for a catcher, call catch*function in the error context (before unwinding the stack), outlet(owlet) is curlet */
@@ -52726,12 +52726,12 @@ static noreturn void error_nr(s7_scheme *sc, s7_pointer type, s7_pointer info)
       catch_function_t catcher = catchers[stack_op(sc->stack, i)];
       if ((SHOW_EVAL_OPS) && (catcher)) {fprintf(stderr, "before catch:\n"); s7_show_stack(sc);}
       if ((catcher) &&
-	  (catcher(sc, i, type, info, &reset_error_hook)))
-	{
-	  if (SHOW_EVAL_OPS) {fprintf(stderr, "  after catch: \n"); s7_show_stack(sc);}
-	  if ((S7_DEBUGGING) && (!sc->longjmp_ok)) fprintf(stderr, "s7_error jump not available?\n");
-	  LongJmp(*(sc->goto_start), CATCH_JUMP);
-	}}
+          (catcher(sc, i, type, info, &reset_error_hook)))
+        {
+          if (SHOW_EVAL_OPS) {fprintf(stderr, "  after catch: \n"); s7_show_stack(sc);}
+          if ((S7_DEBUGGING) && (!sc->longjmp_ok)) fprintf(stderr, "s7_error jump not available?\n");
+          LongJmp(*(sc->goto_start), CATCH_JUMP);
+        }}
   /* error not caught (but catcher might have been called and returned false) */
 
   if ((!reset_error_hook) &&
@@ -52760,104 +52760,104 @@ static noreturn void error_nr(s7_scheme *sc, s7_pointer type, s7_pointer info)
       if (op < 32) sc->print_length = 32;
 
       if ((!is_output_port(current_error_port(sc))) || /* error-port can be #f */
-	  (port_is_closed(current_error_port(sc))))
-	set_current_error_port(sc, sc->standard_error);
+          (port_is_closed(current_error_port(sc))))
+        set_current_error_port(sc, sc->standard_error);
       /* if info is not a list, send object->string to current error port,
        *   else assume car(info) is a format control string, and cdr(info) are its args
        * if at all possible, get some indication of where we are!
        */
 
       if ((!is_pair(info)) ||
-	  (!is_string(car(info))))
-	format_to_error_port(sc, "\n;~S ~S", set_plist_2(sc, type, info), 7);
+          (!is_string(car(info))))
+        format_to_error_port(sc, "\n;~S ~S", set_plist_2(sc, type, info), 7);
       else
-	{
-	  /* it's possible that the error string is just a string -- not intended for format */
-	  if ((type != sc->format_error_symbol) &&      /* avoid an infinite loop of format errors */
-	      (strchr(string_value(car(info)), '~')))
-	    {
-	      s7_int len = string_length(car(info)) + 8;
-	      block_t *b = mallocate(sc, len);
-	      char *errstr = (char *)block_data(b);
-	      s7_int str_len = catstrs_direct(errstr, "\n;", string_value(car(info)), (const char *)NULL);
-	      format_to_error_port(sc, errstr, cdr(info), str_len);
-	      liberate(sc, b);
-	    }
-	  else format_to_error_port(sc, "\n;~S ~S", set_plist_2(sc, type, info), 7); /* 7 = ctrl str len */
-	}
+        {
+          /* it's possible that the error string is just a string -- not intended for format */
+          if ((type != sc->format_error_symbol) &&      /* avoid an infinite loop of format errors */
+              (strchr(string_value(car(info)), '~')))
+            {
+              s7_int len = string_length(car(info)) + 8;
+              block_t *b = mallocate(sc, len);
+              char *errstr = (char *)block_data(b);
+              s7_int str_len = catstrs_direct(errstr, "\n;", string_value(car(info)), (const char *)NULL);
+              format_to_error_port(sc, errstr, cdr(info), str_len);
+              liberate(sc, b);
+            }
+          else format_to_error_port(sc, "\n;~S ~S", set_plist_2(sc, type, info), 7); /* 7 = ctrl str len */
+        }
       if (op < 32) sc->print_length = op;
 
       /* now display location at end */
       if (is_string(slot_value(sc->error_file)))
-	{
-	  s7_newline(sc, current_error_port(sc));
-	  format_to_error_port(sc, ";    ~A\n", set_plist_1(sc, object_to_string_truncated(sc, cur_code)), 8);
-	  format_to_error_port(sc, ";    ~A, line ~D, position: ~D\n",
-			 set_plist_3(sc, slot_value(sc->error_file), slot_value(sc->error_line), slot_value(sc->error_position)), 31);
-	}
+        {
+          s7_newline(sc, current_error_port(sc));
+          format_to_error_port(sc, ";    ~A\n", set_plist_1(sc, object_to_string_truncated(sc, cur_code)), 8);
+          format_to_error_port(sc, ";    ~A, line ~D, position: ~D\n",
+                         set_plist_3(sc, slot_value(sc->error_file), slot_value(sc->error_line), slot_value(sc->error_position)), 31);
+        }
       else
-	{
-	  if ((is_input_port(current_input_port(sc))) &&
-	      (port_file(current_input_port(sc)) != stdin) &&
-	      (!port_is_closed(current_input_port(sc))))
-	    {
-	      const char *filename = port_filename(current_input_port(sc));
-	      int32_t line = port_line_number(current_input_port(sc));
-
-	      if (filename)
-		format_to_error_port(sc, "\n;  ~A[~D]",
-			       set_plist_2(sc, wrap_string(sc, filename, port_filename_length(current_input_port(sc))),
-					   wrap_integer(sc, line)), 10);
-	      else
-		if ((line > 0) &&
-		    (integer(slot_value(sc->error_line)) > 0))
-		  format_to_error_port(sc, "\n;  line ~D", set_plist_1(sc, wrap_integer(sc, line)), 11);
-		else
-		  if (sc->input_port_stack_loc > 0)
-		    {
-		      s7_pointer p = sc->input_port_stack[sc->input_port_stack_loc - 1];
-		      if ((is_input_port(p)) &&
-			  (port_file(p) != stdin) &&
-			  (!port_is_closed(p)))
-			{
-			  filename = port_filename(p);
-			  line = port_line_number(p);
-			  if (filename)
-			    format_to_error_port(sc, "\n;  ~A[~D]",
-					   set_plist_2(sc, wrap_string(sc, filename, port_filename_length(current_input_port(sc))),
-						       wrap_integer(sc, line)), 10);
-			}}}
-	  else
-	    {
-	      const char *call_name = sc->s7_call_name;
-	      if (call_name)
-		{
-		  sc->s7_call_name = NULL;
-		  if ((sc->s7_call_file) &&
-		      (sc->s7_call_line >= 0))
-		    format_to_error_port(sc, "\n;  ~A ~A[~D]",
-				   set_plist_3(sc,
-					       s7_make_string_wrapper(sc, call_name),
-					       s7_make_string_wrapper(sc, sc->s7_call_file),
-					       wrap_integer(sc, sc->s7_call_line)), 13);
-		}}
-	  s7_newline(sc, current_error_port(sc));
-	}
+        {
+          if ((is_input_port(current_input_port(sc))) &&
+              (port_file(current_input_port(sc)) != stdin) &&
+              (!port_is_closed(current_input_port(sc))))
+            {
+              const char *filename = port_filename(current_input_port(sc));
+              int32_t line = port_line_number(current_input_port(sc));
+
+              if (filename)
+                format_to_error_port(sc, "\n;  ~A[~D]",
+                               set_plist_2(sc, wrap_string(sc, filename, port_filename_length(current_input_port(sc))),
+                                           wrap_integer(sc, line)), 10);
+              else
+                if ((line > 0) &&
+                    (integer(slot_value(sc->error_line)) > 0))
+                  format_to_error_port(sc, "\n;  line ~D", set_plist_1(sc, wrap_integer(sc, line)), 11);
+                else
+                  if (sc->input_port_stack_loc > 0)
+                    {
+                      s7_pointer p = sc->input_port_stack[sc->input_port_stack_loc - 1];
+                      if ((is_input_port(p)) &&
+                          (port_file(p) != stdin) &&
+                          (!port_is_closed(p)))
+                        {
+                          filename = port_filename(p);
+                          line = port_line_number(p);
+                          if (filename)
+                            format_to_error_port(sc, "\n;  ~A[~D]",
+                                           set_plist_2(sc, wrap_string(sc, filename, port_filename_length(current_input_port(sc))),
+                                                       wrap_integer(sc, line)), 10);
+                        }}}
+          else
+            {
+              const char *call_name = sc->s7_call_name;
+              if (call_name)
+                {
+                  sc->s7_call_name = NULL;
+                  if ((sc->s7_call_file) &&
+                      (sc->s7_call_line >= 0))
+                    format_to_error_port(sc, "\n;  ~A ~A[~D]",
+                                   set_plist_3(sc,
+                                               s7_make_string_wrapper(sc, call_name),
+                                               s7_make_string_wrapper(sc, sc->s7_call_file),
+                                               wrap_integer(sc, sc->s7_call_line)), 13);
+                }}
+          s7_newline(sc, current_error_port(sc));
+        }
       /* look for __func__ in the error environment etc */
       if (current_error_port(sc) != sc->F)
-	{
-	  s7_pointer errp = s7_stacktrace(sc);
-	  if (string_length(errp) > 0)
-	    {
-	      port_write_string(current_error_port(sc))(sc, string_value(errp), string_length(errp), current_error_port(sc));
-	      port_write_character(current_error_port(sc))(sc, '\n', current_error_port(sc));
-	    }}
+        {
+          s7_pointer errp = s7_stacktrace(sc);
+          if (string_length(errp) > 0)
+            {
+              port_write_string(current_error_port(sc))(sc, string_value(errp), string_length(errp), current_error_port(sc));
+              port_write_character(current_error_port(sc))(sc, '\n', current_error_port(sc));
+            }}
       else
-	if (is_pair(slot_value(sc->error_code)))
-	  {
-	    format_to_error_port(sc, ";    ~S", set_plist_1(sc, slot_value(sc->error_code)), 7);
-	    s7_newline(sc, current_error_port(sc));
-	  }
+        if (is_pair(slot_value(sc->error_code)))
+          {
+            format_to_error_port(sc, ";    ~S", set_plist_1(sc, slot_value(sc->error_code)), 7);
+            s7_newline(sc, current_error_port(sc));
+          }
       /* if (is_continuation(type))
        *   go into repl here with access to continuation?  Or expect *error-handler* to deal with it?
        */
@@ -52886,64 +52886,64 @@ static noreturn void read_error_1_nr(s7_scheme *sc, const char *errmsg, bool str
     {
       /* make an heroic effort to find where we slid off the tracks */
       if (is_string_port(current_input_port(sc)))
-	{
+        {
           #define QUOTE_SIZE 40
-	  s7_int i, j, start = 0, end, slen, size;
-	  char *recent_input = NULL;
-
-	  /* we can run off the end in cases like (eval-string "(. . ,.)") or (eval-string " (@ . ,.)") */
-	  if (port_position(pt) >= port_data_size(pt))
-	    port_position(pt) = port_data_size(pt) - 1;
-
-	  /* start at current position and look back a few chars */
-	  for (i = port_position(pt), j = 0; (i > 0) && (j < QUOTE_SIZE); i--, j++)
-	    if ((port_data(pt)[i] == '\0') || (port_data(pt)[i] == '\n') || (port_data(pt)[i] == '\r'))
-	      break;
-	  start = i;
-
-	  /* start at current position and look ahead a few chars */
-	  size = port_data_size(pt);
-	  for (i = port_position(pt), j = 0; (i < size) && (j < QUOTE_SIZE); i++, j++)
-	    if ((port_data(pt)[i] == '\0') || (port_data(pt)[i] == '\n') || (port_data(pt)[i] == '\r'))
-	      break;
-	  end = i;
-
-	  slen = end - start;  /* hopefully this is more or less the current line where the read error happened */
-	  if (slen > 0)
-	    {
-	      recent_input = (char *)Calloc(slen + 9, 1);
-	      for (i = 0; i < (slen + 8); i++) recent_input[i] = '.';
-	      recent_input[3] = ' ';
-	      recent_input[slen + 4] = ' ';
-	      for (i = 0; i < slen; i++) recent_input[i + 4] = port_data(pt)[start + i];
-	    }
-
-	  if ((port_line_number(pt) > 0) &&
-	      (port_filename(pt)))
-	    {
-	      s7_int len = safe_strlen(recent_input) + safe_strlen(errmsg) + port_filename_length(pt) + safe_strlen(sc->current_file) + 64;
-	      s7_pointer p = make_empty_string(sc, len, '\0');
-	      char *msg = string_value(p);
-	      string_length(p) = snprintf(msg, len, "%s: %s %s[%u], last top-level form at: %s[%" ld64 "]",
-					  errmsg, (recent_input) ? recent_input : "", port_filename(pt), port_line_number(pt),
-					  sc->current_file, sc->current_line);
-	      if (recent_input) free(recent_input);
-	      error_nr(sc, sc->read_error_symbol, set_elist_1(sc, p));
-	    }
-	  else
-	    {
-	      s7_int len = safe_strlen(recent_input) + safe_strlen(errmsg) + safe_strlen(sc->current_file) + 64;
-	      s7_pointer p = make_empty_string(sc, len, '\0');
-	      char *msg = string_value(p);
-	      if ((sc->current_file) &&
-		  (sc->current_line >= 0))
-		string_length(p) = snprintf(msg, len, "%s: %s, last top-level form at %s[%" ld64 "]",
-					    errmsg, (recent_input) ? recent_input : "",
-					    sc->current_file, sc->current_line);
-	      else string_length(p) = snprintf(msg, len, "%s: %s", errmsg, (recent_input) ? recent_input : "");
-	      if (recent_input) free(recent_input);
-	      error_nr(sc, sc->read_error_symbol, set_elist_1(sc, p));
-	    }}}
+          s7_int i, j, start = 0, end, slen, size;
+          char *recent_input = NULL;
+
+          /* we can run off the end in cases like (eval-string "(. . ,.)") or (eval-string " (@ . ,.)") */
+          if (port_position(pt) >= port_data_size(pt))
+            port_position(pt) = port_data_size(pt) - 1;
+
+          /* start at current position and look back a few chars */
+          for (i = port_position(pt), j = 0; (i > 0) && (j < QUOTE_SIZE); i--, j++)
+            if ((port_data(pt)[i] == '\0') || (port_data(pt)[i] == '\n') || (port_data(pt)[i] == '\r'))
+              break;
+          start = i;
+
+          /* start at current position and look ahead a few chars */
+          size = port_data_size(pt);
+          for (i = port_position(pt), j = 0; (i < size) && (j < QUOTE_SIZE); i++, j++)
+            if ((port_data(pt)[i] == '\0') || (port_data(pt)[i] == '\n') || (port_data(pt)[i] == '\r'))
+              break;
+          end = i;
+
+          slen = end - start;  /* hopefully this is more or less the current line where the read error happened */
+          if (slen > 0)
+            {
+              recent_input = (char *)Calloc(slen + 9, 1);
+              for (i = 0; i < (slen + 8); i++) recent_input[i] = '.';
+              recent_input[3] = ' ';
+              recent_input[slen + 4] = ' ';
+              for (i = 0; i < slen; i++) recent_input[i + 4] = port_data(pt)[start + i];
+            }
+
+          if ((port_line_number(pt) > 0) &&
+              (port_filename(pt)))
+            {
+              s7_int len = safe_strlen(recent_input) + safe_strlen(errmsg) + port_filename_length(pt) + safe_strlen(sc->current_file) + 64;
+              s7_pointer p = make_empty_string(sc, len, '\0');
+              char *msg = string_value(p);
+              string_length(p) = snprintf(msg, len, "%s: %s %s[%u], last top-level form at: %s[%" ld64 "]",
+                                          errmsg, (recent_input) ? recent_input : "", port_filename(pt), port_line_number(pt),
+                                          sc->current_file, sc->current_line);
+              if (recent_input) free(recent_input);
+              error_nr(sc, sc->read_error_symbol, set_elist_1(sc, p));
+            }
+          else
+            {
+              s7_int len = safe_strlen(recent_input) + safe_strlen(errmsg) + safe_strlen(sc->current_file) + 64;
+              s7_pointer p = make_empty_string(sc, len, '\0');
+              char *msg = string_value(p);
+              if ((sc->current_file) &&
+                  (sc->current_line >= 0))
+                string_length(p) = snprintf(msg, len, "%s: %s, last top-level form at %s[%" ld64 "]",
+                                            errmsg, (recent_input) ? recent_input : "",
+                                            sc->current_file, sc->current_line);
+              else string_length(p) = snprintf(msg, len, "%s: %s", errmsg, (recent_input) ? recent_input : "");
+              if (recent_input) free(recent_input);
+              error_nr(sc, sc->read_error_symbol, set_elist_1(sc, p));
+            }}}
 
   if ((port_line_number(pt) > 0) &&
       (port_filename(pt)))
@@ -52953,17 +52953,17 @@ static noreturn void read_error_1_nr(s7_scheme *sc, const char *errmsg, bool str
       s7_pointer p = make_empty_string(sc, len, '\0');
       char *msg = string_value(p);
       if (string_error)
-	nlen = snprintf(msg, len, "%s %s[%u],\n;  possible culprit: \"%s...\"\n;  last top-level form at %s[%" ld64 "]",
-		       errmsg, port_filename(pt), port_line_number(pt),
-		       sc->strbuf, sc->current_file, sc->current_line);
+        nlen = snprintf(msg, len, "%s %s[%u],\n;  possible culprit: \"%s...\"\n;  last top-level form at %s[%" ld64 "]",
+                       errmsg, port_filename(pt), port_line_number(pt),
+                       sc->strbuf, sc->current_file, sc->current_line);
       else nlen = snprintf(msg, len, "%s %s[%u], last top-level form at %s[%" ld64 "]",
-			  errmsg, port_filename(pt), port_line_number(pt),
-			  sc->current_file, sc->current_line);
+                          errmsg, port_filename(pt), port_line_number(pt),
+                          sc->current_file, sc->current_line);
       string_length(p) = nlen;
       error_nr(sc, sc->read_error_symbol, set_elist_1(sc, p));
     }
   error_nr(sc, (string_error) ? sc->string_read_error_symbol : sc->read_error_symbol,
-	   set_elist_1(sc, s7_make_string_wrapper(sc, errmsg)));
+           set_elist_1(sc, s7_make_string_wrapper(sc, errmsg)));
 }
 
 static noreturn void read_error_nr(s7_scheme *sc, const char *errmsg) {read_error_1_nr(sc, errmsg, false);}
@@ -52990,24 +52990,24 @@ static char *truncate_string(char *form, s7_int len, use_write_t use_write)
     {
       /* I guess we need to protect the outer double quotes in this case */
       for (i = len - 5; i >= (len / 2); i--)
-	if (is_white_space((int32_t)f[i]))
-	  return(form);
+        if (is_white_space((int32_t)f[i]))
+          return(form);
       i = len - 5;
       if (i > 0) {form[i] = '.'; form[i + 1] = '.'; form[i + 2] = '.'; form[i + 3] = '"'; form[i + 4] = '\0';}
       else
-	if (len >= 2)
-	  {
-	    form[len - 1] = '"';
-	    form[len] = '\0';
-	  }}
+        if (len >= 2)
+          {
+            form[len - 1] = '"';
+            form[len] = '\0';
+          }}
   else
     {
       for (i = len - 4; i >= (len / 2); i--)
-	if (is_white_space((int32_t)f[i]))
-	  {
-	    form[i] = '.'; form[i + 1] = '.'; form[i + 2] = '.'; form[i + 3] = '\0';
-	    return(form);
-	  }
+        if (is_white_space((int32_t)f[i]))
+          {
+            form[i] = '.'; form[i + 1] = '.'; form[i + 2] = '.'; form[i + 3] = '\0';
+            return(form);
+          }
       i = len - 4;
       if (i >= 0) {form[i] = '.'; form[i + 1] = '.'; form[i + 2] = '.'; form[i + 3] = '\0';}
       else form[len] = '\0';
@@ -53036,13 +53036,13 @@ static s7_pointer tree_descend(s7_scheme *sc, s7_pointer p, uint32_t line)
     {
       uint32_t x = (uint32_t)pair_line_number(p);
       if (x > 0)
-	{
-	  if (line == 0) /* first line number we encounter will be the current reader location (i.e. the end of the form) */
-	    line = x;
-	  else
-	    if (x < line)
-	      return(p);
-	}}
+        {
+          if (line == 0) /* first line number we encounter will be the current reader location (i.e. the end of the form) */
+            line = x;
+          else
+            if (x < line)
+              return(p);
+        }}
   tp = tree_descend(sc, car(p), line);
   return((tp) ? tp : tree_descend(sc, cdr(p), line));
 }
@@ -53060,30 +53060,30 @@ static noreturn void missing_close_paren_error_nr(s7_scheme *sc)
     {
       s7_pointer result;
       if ((port_line_number(pt) > 0) &&
-	  (port_filename(pt)))
-	{
-	  set_integer(slot_value(sc->error_line), port_line_number(pt));
-	  set_integer(slot_value(sc->error_position), port_position(pt));
-	  slot_set_value(sc->error_file, wrap_string(sc, port_filename(pt), port_filename_length(pt)));
-	}
+          (port_filename(pt)))
+        {
+          set_integer(slot_value(sc->error_line), port_line_number(pt));
+          set_integer(slot_value(sc->error_position), port_position(pt));
+          slot_set_value(sc->error_file, wrap_string(sc, port_filename(pt), port_filename_length(pt)));
+        }
       result = s7_call(sc, sc->missing_close_paren_hook, sc->nil);
       if (result != sc->unspecified)
-	g_throw(sc, list_1(sc, result));
+        g_throw(sc, list_1(sc, result));
     }
 
   if (is_pair(sc->args))
     {
       s7_pointer p = tree_descend(sc, sc->args, 0);
       if ((p) && (is_pair(p)) &&
-	  (has_location(p)))
-	{
-	  s7_pointer strp = object_to_string_truncated(sc, p);
-	  char *form = string_value(strp);
-	  s7_int form_len = string_length(strp);
-	  s7_int msg_len = form_len + 128;
-	  syntax_msg = (char *)Malloc(msg_len);
-	  snprintf(syntax_msg, msg_len, ";  current form awaiting a close paren starts around line %u: %s", (uint32_t)pair_line_number(p), form);
-	}}
+          (has_location(p)))
+        {
+          s7_pointer strp = object_to_string_truncated(sc, p);
+          char *form = string_value(strp);
+          s7_int form_len = string_length(strp);
+          s7_int msg_len = form_len + 128;
+          syntax_msg = (char *)Malloc(msg_len);
+          snprintf(syntax_msg, msg_len, ";  current form awaiting a close paren starts around line %u: %s", (uint32_t)pair_line_number(p), form);
+        }}
 
   if ((port_line_number(pt) > 0) &&
       (port_filename(pt)))
@@ -53093,15 +53093,15 @@ static noreturn void missing_close_paren_error_nr(s7_scheme *sc)
       s7_pointer p = make_empty_string(sc, len, '\0');
       char *msg = string_value(p);
       if (syntax_msg)
-	{
-	  nlen = snprintf(msg, len, "missing close paren, %s[%u], last top-level form at %s[%" ld64 "]\n%s",
-			 port_filename(pt), port_line_number(pt),
-			 sc->current_file, sc->current_line, syntax_msg);
-	  free(syntax_msg);
-	}
+        {
+          nlen = snprintf(msg, len, "missing close paren, %s[%u], last top-level form at %s[%" ld64 "]\n%s",
+                         port_filename(pt), port_line_number(pt),
+                         sc->current_file, sc->current_line, syntax_msg);
+          free(syntax_msg);
+        }
       else nlen = snprintf(msg, len, "missing close paren, %s[%u], last top-level form at %s[%" ld64 "]",
-			  port_filename(pt), port_line_number(pt),
-			  sc->current_file, sc->current_line);
+                          port_filename(pt), port_line_number(pt),
+                          sc->current_file, sc->current_line);
       string_length(p) = nlen;
       error_nr(sc, sc->read_error_symbol, set_elist_1(sc, p));
     }
@@ -53142,10 +53142,10 @@ static noreturn void improper_arglist_error_nr(s7_scheme *sc)
   s7_pointer func = pop_op_stack(sc);
   if (sc->args == sc->nil)               /* (abs . 1) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_3(sc, wrap_string(sc, "attempt to evaluate (~S . ~S)?", 30), func, sc->code));
+             set_elist_3(sc, wrap_string(sc, "attempt to evaluate (~S . ~S)?", 30), func, sc->code));
   error_nr(sc, sc->syntax_error_symbol,
-	   set_elist_4(sc, wrap_string(sc, "attempt to evaluate (~S ~S . ~S)?", 33),
-		       func, sc->args = proper_list_reverse_in_place(sc, sc->args), sc->code));
+           set_elist_4(sc, wrap_string(sc, "attempt to evaluate (~S ~S . ~S)?", 33),
+                       func, sc->args = proper_list_reverse_in_place(sc, sc->args), sc->code));
 }
 
 static void op_error_hook_quit(s7_scheme *sc)
@@ -53202,17 +53202,17 @@ static bool call_begin_hook(s7_scheme *sc)
       slot_set_value(sc->error_data, sc->value); /* was sc->F but we now clobber this below */
       slot_set_value(sc->error_code, cur_code);
       if (has_location(cur_code))
-	{
-	  set_integer(slot_value(sc->error_line), (s7_int)pair_line_number(cur_code));
-	  slot_set_value(sc->error_file, sc->file_names[pair_file_number(cur_code)]);
-	  set_integer(slot_value(sc->error_position), (s7_int)pair_position(cur_code));
-	}
+        {
+          set_integer(slot_value(sc->error_line), (s7_int)pair_line_number(cur_code));
+          slot_set_value(sc->error_file, sc->file_names[pair_file_number(cur_code)]);
+          set_integer(slot_value(sc->error_position), (s7_int)pair_position(cur_code));
+        }
       else
-	{
-	  set_integer(slot_value(sc->error_line), 0);
-	  set_integer(slot_value(sc->error_position), 0);
-	  slot_set_value(sc->error_file, sc->F);
-	}
+        {
+          set_integer(slot_value(sc->error_line), 0);
+          set_integer(slot_value(sc->error_position), 0);
+          slot_set_value(sc->error_file, sc->F);
+        }
 #if WITH_HISTORY
       slot_set_value(sc->error_history, sc->F);
 #endif
@@ -53243,7 +53243,7 @@ static s7_pointer apply_list_star(s7_scheme *sc, s7_pointer d)
       d = cdr(d);
       set_cdr(p, cons(sc, car(d), cdr(d)));
       if (is_not_null(cdr(d)))
-	p = cdr(p);
+        p = cdr(p);
     }
   unstack_gc_protect(sc);
   set_cdr(p, cadr(p));
@@ -53253,7 +53253,7 @@ static s7_pointer apply_list_star(s7_scheme *sc, s7_pointer d)
 static noreturn void apply_list_error_nr(s7_scheme *sc, s7_pointer lst)
 {
   error_nr(sc, sc->wrong_type_arg_symbol,
-	   set_elist_2(sc, wrap_string(sc, "apply's last argument should be a proper list: ~S", 49), lst));
+           set_elist_2(sc, wrap_string(sc, "apply's last argument should be a proper list: ~S", 49), lst));
 }
 
 static s7_pointer g_apply(s7_scheme *sc, s7_pointer args)
@@ -53280,25 +53280,25 @@ static s7_pointer g_apply(s7_scheme *sc, s7_pointer args)
       /* the last arg is supposed to be a list, it will be spliced onto the end of the previous arg list (if any) below */
 
       if (!s7_is_proper_list(sc, car(p))) /* (apply + #f) etc, the cycle protection here is checked in s7test */
-	apply_list_error_nr(sc, args);
+        apply_list_error_nr(sc, args);
       set_cdr(q, car(p));                 /* args affected, so don't depend on cdr(args) from above */
 
       if (is_c_function(func))            /* handle in-place to get better error messages */
-	{
-	  s7_int len;
-	  uint8_t typ = type(func);
-	  if (typ == T_C_RST_NO_REQ_FUNCTION)
-	    return(c_function_call(func)(sc, cdr(args)));
-	  len = proper_list_length(cdr(args));
-	  if (c_function_max_args(func) < len)
-	    error_nr(sc, sc->wrong_number_of_args_symbol,
-		     set_elist_3(sc, too_many_arguments_string, func, set_ulist_1(sc, sc->apply_symbol, args)));
-	  if ((typ == T_C_FUNCTION) &&
-	      (len < c_function_min_args(func)))
-	    error_nr(sc, sc->wrong_number_of_args_symbol,
-		     set_elist_3(sc, not_enough_arguments_string, func, set_ulist_1(sc, sc->apply_symbol, args)));
-	  return(c_function_call(func)(sc, cdr(args)));
-	}
+        {
+          s7_int len;
+          uint8_t typ = type(func);
+          if (typ == T_C_RST_NO_REQ_FUNCTION)
+            return(c_function_call(func)(sc, cdr(args)));
+          len = proper_list_length(cdr(args));
+          if (c_function_max_args(func) < len)
+            error_nr(sc, sc->wrong_number_of_args_symbol,
+                     set_elist_3(sc, too_many_arguments_string, func, set_ulist_1(sc, sc->apply_symbol, args)));
+          if ((typ == T_C_FUNCTION) &&
+              (len < c_function_min_args(func)))
+            error_nr(sc, sc->wrong_number_of_args_symbol,
+                     set_elist_3(sc, not_enough_arguments_string, func, set_ulist_1(sc, sc->apply_symbol, args)));
+          return(c_function_call(func)(sc, cdr(args)));
+        }
       push_stack(sc, OP_APPLY, cdr(args), func);
       return(sc->nil);
     }
@@ -53351,8 +53351,8 @@ static s7_pointer implicit_index_checked(s7_scheme *sc, s7_pointer obj, s7_point
 {
   if (!is_applicable(in_obj))
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~$ becomes ~$, but ~S can't take arguments", 42),
-			 set_ulist_1(sc, obj, indices), cons(sc, in_obj, cdr(indices)), in_obj));
+             set_elist_4(sc, wrap_string(sc, "~$ becomes ~$, but ~S can't take arguments", 42),
+                         set_ulist_1(sc, obj, indices), cons(sc, in_obj, cdr(indices)), in_obj));
   return(implicit_index(sc, in_obj, cdr(indices)));
 }
 
@@ -53389,27 +53389,27 @@ static s7_pointer implicit_index(s7_scheme *sc, s7_pointer obj, s7_pointer indic
 
     case T_STRING:                       /* (#("12" "34") 0 1) -> #\2 */
       if (!is_null(cdr(indices)))
-	error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, too_many_arguments_string, obj, indices));
+        error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, too_many_arguments_string, obj, indices));
       if (!is_t_integer(car(indices)))
-	wrong_type_error_nr(sc, sc->string_ref_symbol, 2, car(indices), sc->type_names[T_INTEGER]);
+        wrong_type_error_nr(sc, sc->string_ref_symbol, 2, car(indices), sc->type_names[T_INTEGER]);
       return(string_ref_p_pi_unchecked(sc, obj, integer(car(indices))));
 
     case T_PAIR:                         /* (#((1 2) (3 4)) 1 0) -> 3, (#((1 (2 3))) 0 1 0) -> 2 */
       in_obj = list_ref_1(sc, obj, car(indices));
       if (is_pair(cdr(indices)))
-	return(implicit_index_checked(sc, obj, in_obj, indices));
+        return(implicit_index_checked(sc, obj, in_obj, indices));
       return(in_obj);
 
     case T_HASH_TABLE:                   /* ((vector (hash-table '(a . 1) '(b . 2))) 0 'a) -> 1 */
       in_obj = s7_hash_table_ref(sc, obj, car(indices));
       if (is_pair(cdr(indices)))
-	return(implicit_index_checked(sc, obj, in_obj, indices));
+        return(implicit_index_checked(sc, obj, in_obj, indices));
       return(in_obj);
 
     case T_LET:
       in_obj = let_ref(sc, obj, car(indices));
       if (is_pair(cdr(indices)))
-	return(implicit_index_checked(sc, obj, in_obj, indices));
+        return(implicit_index_checked(sc, obj, in_obj, indices));
       return(in_obj);
 
     case T_C_OBJECT:
@@ -53422,8 +53422,8 @@ static s7_pointer implicit_index(s7_scheme *sc, s7_pointer obj, s7_pointer indic
 
     case T_CLOSURE: case T_CLOSURE_STAR:
       if (!is_safe_closure(obj))               /* s7_call can't work in general with unsafe stuff */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "can't call a (possibly unsafe) function implicitly: ~S ~S", 57), obj, indices));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "can't call a (possibly unsafe) function implicitly: ~S ~S", 57), obj, indices));
       check_stack_size(sc);
       sc->temp10 = indices; /* (needs_copied_args(obj)) ? copy_proper_list(sc, indices) : indices; */ /* s7_call copies and this is safe? 2-Oct-22 (and below) */
       sc->value = s7_call(sc, obj, sc->temp10);
@@ -53440,12 +53440,12 @@ static s7_pointer implicit_index(s7_scheme *sc, s7_pointer obj, s7_pointer indic
 
     default:
       if (!is_applicable(obj)) /* (#2d((0 0)(0 0)) 0 0 0) */
-	apply_error_nr(sc, obj, indices);
+        apply_error_nr(sc, obj, indices);
       sc->temp10 = indices; /* (needs_copied_args(obj)) ? copy_proper_list(sc, indices) : indices; */ /* do not use sc->args here! */
       sc->value = s7_call(sc, obj, sc->temp10);
       sc->temp10 = sc->unused;
       if (is_multiple_value(sc->value))
-	sc->value = splice_in_values(sc, multiple_value(sc->value));
+        sc->value = splice_in_values(sc, multiple_value(sc->value));
       return(sc->value);
     }
 }
@@ -53459,10 +53459,10 @@ static inline void fill_star_defaults(s7_scheme *sc, s7_pointer func, int32_t st
   else
     for (int32_t i = start_arg; i < n_args; i++, par = cdr(par))
       {
-	s7_pointer defval = df[i];
-	if (is_symbol(defval))
-	  set_car(par, lookup_checked(sc, defval));
-	else set_car(par, (is_pair(defval)) ? s7_eval(sc, defval, sc->rootlet) : defval);
+        s7_pointer defval = df[i];
+        if (is_symbol(defval))
+          set_car(par, lookup_checked(sc, defval));
+        else set_car(par, (is_pair(defval)) ? s7_eval(sc, defval, sc->rootlet) : defval);
       }
 }
 
@@ -53487,102 +53487,102 @@ static s7_pointer set_c_function_star_args(s7_scheme *sc)
       set_car(par, car(arg));
     else
       {
-	s7_pointer kpar, karg;
-	int32_t ki;
-	/* oops -- there are keywords, change scanners (much duplicated code...)
-	 *   setting checked on the call_args here rather than parsing the parameters to use add_symbol_to_list
-	 */
-	for (kpar = call_args; kpar != par; kpar = cdr(kpar))
-	  set_checked(kpar);
-	for (; is_pair(kpar); kpar = cdr(kpar))
-	  clear_checked(kpar);
-	df = c_function_arg_names(func); /* changed to use symbols here, not keywords 2-Jan-24 */
-	for (ki = i, karg = arg, kpar = par; (ki < n_args) && (is_pair(karg)); ki++, karg = cdr(karg))
-	  if (!is_symbol_and_keyword(car(karg)))
-	    {
-	      if (is_checked(kpar))
-		{
-		  if (!is_safe_procedure(func)) unstack_gc_protect(sc);
-		  error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, parameter_set_twice_string, car(kpar), sc->args));
-		}
-	      set_checked(kpar);
-	      set_car(kpar, car(karg));
-	      kpar = cdr(kpar);
-	    }
-	  else
-	    {
-	      s7_pointer p;
-	      for (j = 0, p = call_args; j < n_args; j++, p = cdr(p))
-		if (df[j] == keyword_symbol(car(karg)))
-		  break;
-	      if (j == n_args)
-		{
-		  if (!c_function_allows_other_keys(func))
-		    {
-		      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
-		      error_nr(sc, sc->wrong_type_arg_symbol,
-			       set_elist_2(sc, wrap_string(sc, "~A is not a parameter name?", 27), car(karg)));
-		    }
-		  karg = cdr(karg);
-		  if (is_null(karg)) /* (f :x) where f arglist includes :allow-other-keys */
-		    {
-		      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
-		      error_nr(sc, sc->syntax_error_symbol,
-			       set_elist_4(sc, wrap_string(sc, "~A: key ~S, but no value: ~S", 28), func, car(arg), sc->args));
-		    }
-		  ki--;
-		}
-	      else
-		{
-		  if (is_checked(p))
-		    {
-		      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
-		      error_nr(sc, sc->wrong_type_arg_symbol,
-			       set_elist_3(sc, parameter_set_twice_string, car(p), sc->args));
-		    }
-		  if (!is_pair(cdr(karg)))
-		    {
-		      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
-		      error_nr(sc, sc->syntax_error_symbol,
-			       set_elist_4(sc, wrap_string(sc, "~A: key ~S, but no value: ~S", 28), func, car(karg), sc->args));
-		    }
-		  set_checked(p);
-		  karg = cdr(karg);
-		  set_car(p, car(karg));
-		  kpar = cdr(kpar);
-		}}
-	if ((!is_null(karg)) && (!c_function_allows_other_keys(func)))
-	  {
-	    if (!is_safe_procedure(func)) unstack_gc_protect(sc);
-	    error_nr(sc, sc->wrong_number_of_args_symbol,
-		     set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, sc->args));
-	  }
-	if (ki < n_args)
-	  {
-	    df = c_function_arg_defaults(func);
-	    if (c_func_has_simple_defaults(func))
-	      {
-		for (ki = i, kpar = par; ki < n_args; ki++, kpar = cdr(kpar))
-		  if (!is_checked(kpar))
-		    set_car(kpar, df[ki]);
-	      }
-	    else
-	      for (ki = i, kpar = par; ki < n_args; ki++, kpar = cdr(kpar))
-		if (!is_checked(kpar))
-		  {
-		    s7_pointer defval = df[ki];
-		    if (is_symbol(defval))
-		      set_car(kpar, lookup_checked(sc, defval));
-		    else set_car(kpar, (is_pair(defval)) ? s7_eval(sc, defval, sc->rootlet) : defval);
-		  }}
-	if (!is_safe_procedure(func)) unstack_gc_protect(sc);
-	return(call_args);
+        s7_pointer kpar, karg;
+        int32_t ki;
+        /* oops -- there are keywords, change scanners (much duplicated code...)
+         *   setting checked on the call_args here rather than parsing the parameters to use add_symbol_to_list
+         */
+        for (kpar = call_args; kpar != par; kpar = cdr(kpar))
+          set_checked(kpar);
+        for (; is_pair(kpar); kpar = cdr(kpar))
+          clear_checked(kpar);
+        df = c_function_arg_names(func); /* changed to use symbols here, not keywords 2-Jan-24 */
+        for (ki = i, karg = arg, kpar = par; (ki < n_args) && (is_pair(karg)); ki++, karg = cdr(karg))
+          if (!is_symbol_and_keyword(car(karg)))
+            {
+              if (is_checked(kpar))
+                {
+                  if (!is_safe_procedure(func)) unstack_gc_protect(sc);
+                  error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, parameter_set_twice_string, car(kpar), sc->args));
+                }
+              set_checked(kpar);
+              set_car(kpar, car(karg));
+              kpar = cdr(kpar);
+            }
+          else
+            {
+              s7_pointer p;
+              for (j = 0, p = call_args; j < n_args; j++, p = cdr(p))
+                if (df[j] == keyword_symbol(car(karg)))
+                  break;
+              if (j == n_args)
+                {
+                  if (!c_function_allows_other_keys(func))
+                    {
+                      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
+                      error_nr(sc, sc->wrong_type_arg_symbol,
+                               set_elist_2(sc, wrap_string(sc, "~A is not a parameter name?", 27), car(karg)));
+                    }
+                  karg = cdr(karg);
+                  if (is_null(karg)) /* (f :x) where f arglist includes :allow-other-keys */
+                    {
+                      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
+                      error_nr(sc, sc->syntax_error_symbol,
+                               set_elist_4(sc, wrap_string(sc, "~A: key ~S, but no value: ~S", 28), func, car(arg), sc->args));
+                    }
+                  ki--;
+                }
+              else
+                {
+                  if (is_checked(p))
+                    {
+                      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
+                      error_nr(sc, sc->wrong_type_arg_symbol,
+                               set_elist_3(sc, parameter_set_twice_string, car(p), sc->args));
+                    }
+                  if (!is_pair(cdr(karg)))
+                    {
+                      if (!is_safe_procedure(func)) unstack_gc_protect(sc);
+                      error_nr(sc, sc->syntax_error_symbol,
+                               set_elist_4(sc, wrap_string(sc, "~A: key ~S, but no value: ~S", 28), func, car(karg), sc->args));
+                    }
+                  set_checked(p);
+                  karg = cdr(karg);
+                  set_car(p, car(karg));
+                  kpar = cdr(kpar);
+                }}
+        if ((!is_null(karg)) && (!c_function_allows_other_keys(func)))
+          {
+            if (!is_safe_procedure(func)) unstack_gc_protect(sc);
+            error_nr(sc, sc->wrong_number_of_args_symbol,
+                     set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, sc->args));
+          }
+        if (ki < n_args)
+          {
+            df = c_function_arg_defaults(func);
+            if (c_func_has_simple_defaults(func))
+              {
+                for (ki = i, kpar = par; ki < n_args; ki++, kpar = cdr(kpar))
+                  if (!is_checked(kpar))
+                    set_car(kpar, df[ki]);
+              }
+            else
+              for (ki = i, kpar = par; ki < n_args; ki++, kpar = cdr(kpar))
+                if (!is_checked(kpar))
+                  {
+                    s7_pointer defval = df[ki];
+                    if (is_symbol(defval))
+                      set_car(kpar, lookup_checked(sc, defval));
+                    else set_car(kpar, (is_pair(defval)) ? s7_eval(sc, defval, sc->rootlet) : defval);
+                  }}
+        if (!is_safe_procedure(func)) unstack_gc_protect(sc);
+        return(call_args);
       }
   if (!is_null(arg))
     {
       if (!is_safe_procedure(func)) unstack_gc_protect(sc);
       error_nr(sc, sc->wrong_number_of_args_symbol,
-	       set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, sc->args));
+               set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, sc->args));
     }
   if (i < n_args)
     fill_star_defaults(sc, func, i, n_args, par);
@@ -53645,16 +53645,16 @@ s7_pointer s7_eval(s7_scheme *sc, s7_pointer code, s7_pointer e)
   if (sc->safety > NO_SAFETY)
     {
       if (!s7_is_valid(sc, code))
-	s7_warn(sc, 256, "the second argument to %s (the code to be evaluated): %p, is not an s7 object\n", __func__, code);
+        s7_warn(sc, 256, "the second argument to %s (the code to be evaluated): %p, is not an s7 object\n", __func__, code);
       if (!s7_is_valid(sc, e))
-	s7_warn(sc, 256, "the third argument to %s (the environment): %p, is not an s7 object\n", __func__, e);
+        s7_warn(sc, 256, "the third argument to %s (the environment): %p, is not an s7 object\n", __func__, e);
     }
   store_jump_info(sc);
   set_jump_info(sc, EVAL_SET_JUMP);
   if (jump_loc != NO_JUMP)
     {
       if (jump_loc != ERROR_JUMP)
-	eval(sc, sc->cur_op);
+        eval(sc, sc->cur_op);
     }
   else
     {
@@ -53706,7 +53706,7 @@ pass (rootlet):\n\
     {
       s7_pointer e = cadr(args);
       if (!is_let(e))
-	wrong_type_error_nr(sc, sc->eval_symbol, 2, e, a_let_string);
+        wrong_type_error_nr(sc, sc->eval_symbol, 2, e, a_let_string);
       set_curlet(sc, e);
     }
   sc->code = car(args);
@@ -53746,21 +53746,21 @@ s7_pointer s7_call(s7_scheme *sc, s7_pointer func, s7_pointer args)
     set_jump_info(sc, S7_CALL_SET_JUMP);
     if (jump_loc != NO_JUMP)
       {
-	if (jump_loc != ERROR_JUMP)
-	  eval(sc, sc->cur_op);
+        if (jump_loc != ERROR_JUMP)
+          eval(sc, sc->cur_op);
 
-	if ((jump_loc == CATCH_JUMP) &&                /* we're returning (back to eval) from an error in catch */
-	    (sc->stack_end == sc->stack_start))
-	  push_stack_op(sc, OP_ERROR_QUIT);
+        if ((jump_loc == CATCH_JUMP) &&                /* we're returning (back to eval) from an error in catch */
+            (sc->stack_end == sc->stack_start))
+          push_stack_op(sc, OP_ERROR_QUIT);
       }
     else
       {
-	if (sc->safety > NO_SAFETY)
-	  check_list_validity(sc, __func__, args);
-	push_stack_direct(sc, OP_EVAL_DONE); /* this saves the current evaluation and will eventually finish this (possibly) nested call */
-	sc->code = func;
-	sc->args = (needs_copied_args(func)) ? copy_proper_list(sc, args) : args;
-	eval(sc, OP_APPLY);
+        if (sc->safety > NO_SAFETY)
+          check_list_validity(sc, __func__, args);
+        push_stack_direct(sc, OP_EVAL_DONE); /* this saves the current evaluation and will eventually finish this (possibly) nested call */
+        sc->code = func;
+        sc->args = (needs_copied_args(func)) ? copy_proper_list(sc, args) : args;
+        eval(sc, OP_APPLY);
       }
     restore_jump_info(sc);
     /* don't clear temp4 or temp2 here -- lots of (Snd) code calls s7_call repeatedly and assumes the "func" arg is protected between calls */
@@ -53793,8 +53793,8 @@ s7_pointer s7_call_with_location(s7_scheme *sc, s7_pointer func, s7_pointer args
 static inline bool gen_type_match(s7_scheme *sc, s7_pointer val, uint8_t typ)  /* opt3_byte = uint8_t */
 {
   return((type(val) == typ) ||
-	 ((has_active_methods(sc, val)) &&
-	  (apply_boolean_method(sc, val, sc->type_to_typers[typ]) != sc->F)));
+         ((has_active_methods(sc, val)) &&
+          (apply_boolean_method(sc, val, sc->type_to_typers[typ]) != sc->F)));
 }
 #else
 #define gen_type_match(Sc, Val, Typ) \
@@ -53912,13 +53912,13 @@ static s7_pointer g_exit(s7_scheme *sc, s7_pointer args)
   for (int64_t i = stack_top(sc) - 1; i > 0; i -= 4)
     if (stack_op(sc->stack, i) == OP_DYNAMIC_WIND)
       {
-	s7_pointer dwind = T_Dyn(stack_code(sc->stack, i));
-	if (dynamic_wind_state(dwind) == DWIND_BODY) /* otherwise init func never ran? */
-	  {
-	    dynamic_wind_state(dwind) = DWIND_FINISH;
-	    if (dynamic_wind_out(dwind) != sc->F)
-	      s7_call(sc, dynamic_wind_out(dwind), sc->nil);
-	  }}
+        s7_pointer dwind = T_Dyn(stack_code(sc->stack, i));
+        if (dynamic_wind_state(dwind) == DWIND_BODY) /* otherwise init func never ran? */
+          {
+            dynamic_wind_state(dwind) = DWIND_FINISH;
+            if (dynamic_wind_out(dwind) != sc->F)
+              s7_call(sc, dynamic_wind_out(dwind), sc->nil);
+          }}
   s7_quit(sc);
 
   if (show_gc_stats(sc))
@@ -53949,7 +53949,7 @@ static void check_t_1(s7_scheme *sc, s7_pointer e, const char* func, s7_pointer
   if (let_slots(e) != s7_slot(sc, var))
     {
       fprintf(stderr, "%s%s %s is out of date (%s in %s -> %s)%s\n", bold_text, func, display(expr), display(var), display(sc->curlet),
-	      (tis_slot(let_slots(e))) ? display(let_slots(e)) : "no slots", unbold_text);
+              (tis_slot(let_slots(e))) ? display(let_slots(e)) : "no slots", unbold_text);
       if (sc->stop_at_error) abort();
     }
 }
@@ -53971,7 +53971,7 @@ static void check_u_1(s7_scheme *sc, s7_pointer e, const char* func, s7_pointer
   if (next_slot(let_slots(e)) != s7_slot(sc, var))
     {
       fprintf(stderr, "%s%s %s is out of date (%s in %s -> %s)%s\n", bold_text, func, display(expr), display(var), display(e),
-	      (tis_slot(next_slot(let_slots(e)))) ? display(next_slot(let_slots(e))) : "no next slot", unbold_text);
+              (tis_slot(next_slot(let_slots(e)))) ? display(next_slot(let_slots(e))) : "no next slot", unbold_text);
       if (sc->stop_at_error) abort();
     }
 }
@@ -53993,7 +53993,7 @@ static void check_v_1(s7_scheme *sc, s7_pointer e, const char* func, s7_pointer
   if (next_slot(next_slot(let_slots(e))) != s7_slot(sc, var))
     {
       fprintf(stderr, "%s%s %s is out of date (%s in %s -> %s)%s\n", bold_text, func, display(expr), display(var), display(e),
-	      (tis_slot(next_slot(next_slot(let_slots(e))))) ? display(next_slot(next_slot(let_slots(e)))) : "no next slot", unbold_text);
+              (tis_slot(next_slot(next_slot(let_slots(e))))) ? display(next_slot(next_slot(let_slots(e)))) : "no next slot", unbold_text);
       if (sc->stop_at_error) abort();
     }
 }
@@ -54016,7 +54016,7 @@ static void check_o_1(s7_scheme *sc, s7_pointer e, const char* func, s7_pointer
   if (lookup_slot_with_let(sc, var, e) != slot)
     {
       fprintf(stderr, "%s%s %s is out of date (%s in %s -> %s)%s\n", bold_text, func, display(expr), display(var), display(e),
-	      (tis_slot(slot)) ? display(slot) : "undefined", unbold_text);
+              (tis_slot(slot)) ? display(slot) : "undefined", unbold_text);
       if (sc->stop_at_error) abort();
     }
 }
@@ -54091,7 +54091,7 @@ static s7_pointer fx_c_v_direct(s7_scheme *sc, s7_pointer arg) {return(((s7_p_p_
 
 #define fx_car_any(Name, Lookup) \
   static s7_pointer Name(s7_scheme *sc, s7_pointer arg) \
-  {							\
+  {                                                        \
     s7_pointer val = Lookup(sc, cadr(arg), arg);        \
     return((is_pair(val)) ? car(val) : g_car(sc, set_plist_1(sc, val))); \
   }
@@ -54107,8 +54107,8 @@ fx_car_any(fx_car_U, U_lookup)
 
 #define fx_cdr_any(Name, Lookup) \
   static s7_pointer Name(s7_scheme *sc, s7_pointer arg) \
-  {							\
-    s7_pointer val = Lookup(sc, cadr(arg), arg);					\
+  {                                                        \
+    s7_pointer val = Lookup(sc, cadr(arg), arg);                                        \
     return((is_pair(val)) ? cdr(val) : g_cdr(sc, set_plist_1(sc, val))); \
   }
 
@@ -54256,11 +54256,11 @@ static s7_pointer fx_add_ft(s7_scheme *sc, s7_pointer arg) {return(g_add_xf(sc,
     if ((!WITH_GMP) && (is_t_integer(x))) \
       { \
         if (HAVE_OVERFLOW_CHECKS) \
-  	  { \
-  	    s7_int val; \
-  	    if (!add_overflow(integer(x), integer(opt2_con(cdr(arg))), &val)) \
-  	      return(make_integer(sc, val)); \
-  	  } \
+            { \
+              s7_int val; \
+              if (!add_overflow(integer(x), integer(opt2_con(cdr(arg))), &val)) \
+                return(make_integer(sc, val)); \
+            } \
         else return(make_integer(sc, integer(x) + integer(opt2_con(cdr(arg))))); \
       } \
     return(add_p_pp(sc, x, opt2_con(cdr(arg)))); /* caddr(arg) */ \
@@ -54300,11 +54300,11 @@ fx_subtract_s1_any(fx_subtract_U1, U_lookup)
     if ((!WITH_GMP) && (is_t_integer(x))) \
       { \
         if (HAVE_OVERFLOW_CHECKS) \
-  	  { \
-  	    s7_int val; \
-  	    if (!subtract_overflow(integer(x), integer(opt2_con(cdr(arg))), &val)) \
-  	      return(make_integer(sc, val)); \
-  	  } \
+            { \
+              s7_int val; \
+              if (!subtract_overflow(integer(x), integer(opt2_con(cdr(arg))), &val)) \
+                return(make_integer(sc, val)); \
+            } \
         else return(make_integer(sc, integer(x) - integer(opt2_con(cdr(arg))))); \
       } \
     return(subtract_p_pp(sc, x, opt2_con(cdr(arg)))); /* caddr(arg) */ \
@@ -54584,14 +54584,14 @@ static s7_pointer fx_num_eq_length_i(s7_scheme *sc, s7_pointer arg)
 
     case T_ITERATOR:
       {
-	s7_pointer len = s7_length(sc, iterator_sequence(val));
-	return(make_boolean(sc, (is_t_integer(len)) && (integer(len) == ilen)));
+        s7_pointer len = s7_length(sc, iterator_sequence(val));
+        return(make_boolean(sc, (is_t_integer(len)) && (integer(len) == ilen)));
       }
 
     case T_CLOSURE:
     case T_CLOSURE_STAR:
       if (has_active_methods(sc, val))
-	return(make_boolean(sc, closure_length(sc, val) == ilen));
+        return(make_boolean(sc, closure_length(sc, val) == ilen));
       /* fall through */
 
     default:
@@ -54620,14 +54620,14 @@ static s7_pointer fx_less_length_i(s7_scheme *sc, s7_pointer arg)
 
     case T_ITERATOR:
       {
-	s7_pointer len = s7_length(sc, iterator_sequence(val));
-	return(make_boolean(sc, (is_t_integer(len)) && (integer(len) < ilen)));
+        s7_pointer len = s7_length(sc, iterator_sequence(val));
+        return(make_boolean(sc, (is_t_integer(len)) && (integer(len) < ilen)));
       }
 
     case T_CLOSURE:
     case T_CLOSURE_STAR:
       if (has_active_methods(sc, val))
-	return(make_boolean(sc, closure_length(sc, val) < ilen));
+        return(make_boolean(sc, closure_length(sc, val) < ilen));
       /* fall through */
 
     default:
@@ -54821,21 +54821,21 @@ static inline s7_pointer fx_sqr_1(s7_scheme *sc, s7_pointer x)
 #if HAVE_OVERFLOW_CHECKS
     case T_INTEGER:
       {
-	s7_int val;
-	if (multiply_overflow(integer(x), integer(x), &val))
-	  {
-	    if (WITH_WARNINGS) s7_warn(sc, 128, "integer sqr overflow: (* %" ld64 " %" ld64 ")\n", integer(x), integer(x));
-	    return(make_real(sc, (long_double)integer(x) * (long_double)integer(x)));
-	  }
-	return(make_integer(sc, val));
+        s7_int val;
+        if (multiply_overflow(integer(x), integer(x), &val))
+          {
+            if (WITH_WARNINGS) s7_warn(sc, 128, "integer sqr overflow: (* %" ld64 " %" ld64 ")\n", integer(x), integer(x));
+            return(make_real(sc, (long_double)integer(x) * (long_double)integer(x)));
+          }
+        return(make_integer(sc, val));
       }
     case T_RATIO:
       {
-	s7_int num, den;
-	if ((multiply_overflow(numerator(x), numerator(x), &num)) ||
-	    (multiply_overflow(denominator(x), denominator(x), &den)))
-	  return(make_real(sc, fraction(x) * fraction(x)));
-	return(make_ratio_with_div_check(sc, sc->multiply_symbol, num, den));
+        s7_int num, den;
+        if ((multiply_overflow(numerator(x), numerator(x), &num)) ||
+            (multiply_overflow(denominator(x), denominator(x), &den)))
+          return(make_real(sc, fraction(x) * fraction(x)));
+        return(make_ratio_with_div_check(sc, sc->multiply_symbol, num, den));
       }
 #else
     case T_INTEGER: return(make_integer(sc, integer(x) * integer(x)));
@@ -55018,7 +55018,7 @@ static s7_pointer fx_geq_t0(s7_scheme *sc, s7_pointer arg)
   static s7_pointer Name(s7_scheme *sc, s7_pointer arg) \
   { \
     s7_pointer x = Lookup1(sc, cadr(arg), arg); \
-    s7_pointer y = Lookup2(sc, opt2_sym(cdr(arg)), arg);				\
+    s7_pointer y = Lookup2(sc, opt2_sym(cdr(arg)), arg);                                \
     return(make_boolean(sc, ((is_t_integer(x)) && (is_t_integer(y))) ? (integer(x) == integer(y)) : num_eq_b_7pp(sc, x, y))); \
   }
 
@@ -55039,7 +55039,7 @@ fx_num_eq_ss_any(fx_num_eq_vU, v_lookup, U_lookup)
 #define fx_is_eq_ss_any(Name, Lookup1, Lookup2) \
   static s7_pointer Name(s7_scheme *sc, s7_pointer arg) \
   { \
-    s7_pointer x = Lookup1(sc, cadr(arg), arg);	      \
+    s7_pointer x = Lookup1(sc, cadr(arg), arg);              \
     s7_pointer y = Lookup2(sc, opt2_sym(cdr(arg)), arg); \
     return(make_boolean(sc, (x == y) || ((is_unspecified(x)) && (is_unspecified(y))))); \
   }
@@ -55092,7 +55092,7 @@ static inline s7_pointer fx_hash_table_increment_1(s7_scheme *sc, s7_pointer tab
   if (val != sc->unentry)
     {
       if (!is_t_integer(hash_entry_value(val)))
-	sole_arg_wrong_type_error_nr(sc, sc->add_symbol, cadddr(arg), sc->type_names[T_INTEGER]);
+        sole_arg_wrong_type_error_nr(sc, sc->add_symbol, cadddr(arg), sc->type_names[T_INTEGER]);
       hash_entry_set_value(val, make_integer(sc, integer(hash_entry_value(val)) + 1));
       return(hash_entry_value(val));
     }
@@ -55112,7 +55112,7 @@ static s7_pointer fx_simple_let_ref_s(s7_scheme *sc, s7_pointer arg)
   s7_pointer lt = s_lookup(sc, opt2_sym(arg), arg);  /* (var-ref local-var) -> local-var, opt_sym2(arg) == cadr(arg) */
   if (!is_pair(lt))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~S should be (cons name let), but it is ~S", 42), opt2_sym(arg), lt));
+             set_elist_3(sc, wrap_string(sc, "~S should be (cons name let), but it is ~S", 42), opt2_sym(arg), lt));
   lt = cdr(lt);
   if (!is_let(lt)) wrong_type_error_nr(sc, sc->let_ref_symbol, 1, lt, a_let_string);
   sym = opt2_sym(cdr(arg));                  /* (let-ref (cdr v) 'ref) -> ref == opt3_sym(cdar(closure_body(opt1_lambda(arg)))); */
@@ -55298,8 +55298,8 @@ static s7_pointer fx_is_type_car_s(s7_scheme *sc, s7_pointer arg)
 {
   s7_pointer val = lookup(sc, opt3_sym(arg));
   return(make_boolean(sc, (is_pair(val)) ?
-		            ((uint8_t)(opt3_byte(cdr(arg))) == type(car(val))) :
-		            ((uint8_t)(opt3_byte(cdr(arg))) == type(g_car(sc, set_plist_1(sc, val))))));
+                            ((uint8_t)(opt3_byte(cdr(arg))) == type(car(val))) :
+                            ((uint8_t)(opt3_byte(cdr(arg))) == type(g_car(sc, set_plist_1(sc, val))))));
 }
 
 static s7_pointer fx_is_type_car_t(s7_scheme *sc, s7_pointer arg)
@@ -55482,8 +55482,8 @@ static s7_pointer fx_c_opssq_s_direct(s7_scheme *sc, s7_pointer arg)
 {
   s7_pointer largs = opt3_pair(arg); /* cdadr(arg) */
   return(((s7_p_pp_t)opt2_direct(cdr(arg)))(sc,
-	   ((s7_p_pp_t)opt3_direct(cdr(arg)))(sc, lookup(sc, car(largs)), lookup(sc, opt2_sym(largs))),
-	   lookup(sc, caddr(arg))));
+           ((s7_p_pp_t)opt3_direct(cdr(arg)))(sc, lookup(sc, car(largs)), lookup(sc, opt2_sym(largs))),
+           lookup(sc, caddr(arg))));
 }
 
 static s7_pointer fx_add_mul_opssq_s(s7_scheme *sc, s7_pointer arg)
@@ -55497,11 +55497,11 @@ static s7_pointer fx_add_mul_opssq_s(s7_scheme *sc, s7_pointer arg)
     {
       s7_int val;
       if ((multiply_overflow(integer(a), integer(b), &val)) ||
-	  (add_overflow(val, integer(c), &val)))
-	{
-	  if (WITH_WARNINGS) s7_warn(sc, 128, "integer multiply/add overflow: (+ (* %" ld64 " %" ld64 ") %" ld64 ")\n", integer(a), integer(b), integer(c));
-	  return(make_real(sc, ((long_double)integer(a) * (long_double)integer(b)) + (long_double)integer(c)));
-	}
+          (add_overflow(val, integer(c), &val)))
+        {
+          if (WITH_WARNINGS) s7_warn(sc, 128, "integer multiply/add overflow: (+ (* %" ld64 " %" ld64 ") %" ld64 ")\n", integer(a), integer(b), integer(c));
+          return(make_real(sc, ((long_double)integer(a) * (long_double)integer(b)) + (long_double)integer(c)));
+        }
       return(make_integer(sc, val));
     }
 #else
@@ -55631,11 +55631,11 @@ static inline s7_pointer fx_vref_vref_3(s7_scheme *sc, s7_pointer v1, s7_pointer
     {
       s7_int i1 = integer(p1), i2 = integer(p2);
       if ((i1 >= 0) && (i2 >= 0) && (i1 < vector_length(v1)))
-	{
-	  s7_pointer v2 = vector_element(v1, i1);
-	  if ((is_t_vector(v2)) && (vector_rank(v2) == 1) && (i2 < vector_length(v2)))
-	    return(vector_element(v2, i2));
-	}}
+        {
+          s7_pointer v2 = vector_element(v1, i1);
+          if ((is_t_vector(v2)) && (vector_rank(v2) == 1) && (i2 < vector_length(v2)))
+            return(vector_element(v2, i2));
+        }}
   return(vector_ref_p_pp(sc, vector_ref_p_pp(sc, v1, p1), p2));
 }
 
@@ -55710,8 +55710,8 @@ fx_c_opsq_s_any(fx_c_opuq_t, u_lookup, t_lookup)
   static s7_pointer Name(s7_scheme *sc, s7_pointer arg) \
   { \
     return(((s7_p_pp_t)opt2_direct(cdr(arg)))(sc, \
-	      ((s7_p_p_t)opt3_direct(cdr(arg)))(sc, Lookup1(sc, opt1_sym(cdr(arg)), arg)), \
-	      Lookup2(sc, opt3_sym(arg), arg))); \
+              ((s7_p_p_t)opt3_direct(cdr(arg)))(sc, Lookup1(sc, opt1_sym(cdr(arg)), arg)), \
+              Lookup2(sc, opt3_sym(arg), arg))); \
   }
 
 fx_c_opsq_s_direct_any(fx_c_opsq_s_direct, s_lookup, s_lookup)
@@ -55804,7 +55804,7 @@ static s7_pointer fx_c_s_opssq(s7_scheme *sc, s7_pointer arg)
     s7_pointer largs = opt3_pair(arg); /* cdaddr(arg) */ \
     arg = cdr(arg); \
     return(((s7_p_pp_t)opt2_direct(arg))(sc, Lookup1(sc, car(arg), arg), \
-					 ((s7_p_pp_t)opt3_direct(arg))(sc, lookup(sc, car(largs)), Lookup2(sc, opt2_sym(largs), largs)))); \
+                                         ((s7_p_pp_t)opt3_direct(arg))(sc, lookup(sc, car(largs)), Lookup2(sc, opt2_sym(largs), largs)))); \
   }
 
 fx_c_s_opssq_direct_any(fx_c_s_opssq_direct, s_lookup, s_lookup)
@@ -55814,13 +55814,13 @@ fx_c_s_opssq_direct_any(fx_c_t_opsuq_direct, t_lookup, u_lookup)
 static s7_pointer fx_vref_g_vref_gs(s7_scheme *sc, s7_pointer arg)
 {
   return(vector_ref_p_pp(sc, lookup_global(sc, cadr(arg)),
-			 vector_ref_p_pp(sc, lookup_global(sc, car(opt3_pair(arg))), lookup(sc, opt2_sym(opt3_pair(arg))))));
+                         vector_ref_p_pp(sc, lookup_global(sc, car(opt3_pair(arg))), lookup(sc, opt2_sym(opt3_pair(arg))))));
 }
 
 static s7_pointer fx_vref_g_vref_gt(s7_scheme *sc, s7_pointer arg)
 {
   return(vector_ref_p_pp(sc, lookup_global(sc, cadr(arg)),
-			 vector_ref_p_pp(sc, lookup_global(sc, car(opt3_pair(arg))), t_lookup(sc, opt2_sym(opt3_pair(arg)), arg))));
+                         vector_ref_p_pp(sc, lookup_global(sc, car(opt3_pair(arg))), t_lookup(sc, opt2_sym(opt3_pair(arg)), arg))));
 }
 
 static s7_pointer fx_c_c_opssq(s7_scheme *sc, s7_pointer arg)
@@ -55834,7 +55834,7 @@ static s7_pointer fx_c_c_opssq(s7_scheme *sc, s7_pointer arg)
 static s7_pointer fx_c_c_opssq_direct(s7_scheme *sc, s7_pointer arg)
 {
   return(((s7_p_pp_t)opt2_direct(cdr(arg)))(sc, cadr(arg), /* see above */
-	   ((s7_p_pp_t)opt3_direct(cdr(arg)))(sc, lookup(sc, opt3_sym(arg)), lookup(sc, opt1_sym(cdr(arg))))));
+           ((s7_p_pp_t)opt3_direct(cdr(arg)))(sc, lookup(sc, opt3_sym(arg)), lookup(sc, opt1_sym(cdr(arg))))));
 }
 
 static s7_pointer fx_c_nc_opssq_direct(s7_scheme *sc, s7_pointer arg) /* clm2xen (* 1.0 (oscil g2 x2)) */
@@ -55851,15 +55851,15 @@ static s7_pointer fx_multiply_c_opssq(s7_scheme *sc, s7_pointer arg) /* (* c=flo
   return(multiply_p_pp(sc, cadr(arg), multiply_p_pp(sc, x1, x2)));
 }
 
-#define fx_c_s_opscq_any(Name, Lookup1, Lookup2)		\
-  static s7_pointer Name(s7_scheme *sc, s7_pointer arg)		\
-  {								\
-    s7_pointer largs = caddr(arg);				\
-    set_car(sc->t2_1, Lookup2(sc, cadr(largs), arg));		\
-    set_car(sc->t2_2, opt2_con(cdr(largs)));			\
-    set_car(sc->t2_2, fn_proc(largs)(sc, sc->t2_1));		\
-    set_car(sc->t2_1, Lookup1(sc, cadr(arg), arg));		\
-    return(fn_proc(arg)(sc, sc->t2_1));				\
+#define fx_c_s_opscq_any(Name, Lookup1, Lookup2)                \
+  static s7_pointer Name(s7_scheme *sc, s7_pointer arg)                \
+  {                                                                \
+    s7_pointer largs = caddr(arg);                                \
+    set_car(sc->t2_1, Lookup2(sc, cadr(largs), arg));                \
+    set_car(sc->t2_2, opt2_con(cdr(largs)));                        \
+    set_car(sc->t2_2, fn_proc(largs)(sc, sc->t2_1));                \
+    set_car(sc->t2_1, Lookup1(sc, cadr(arg), arg));                \
+    return(fn_proc(arg)(sc, sc->t2_1));                                \
   }
 
 fx_c_s_opscq_any(fx_c_s_opscq, s_lookup, s_lookup)
@@ -55874,19 +55874,19 @@ static s7_pointer fx_c_s_opscq_direct(s7_scheme *sc, s7_pointer arg)
 static s7_pointer fx_c_s_opsiq_direct(s7_scheme *sc, s7_pointer arg)
 {
   return(((s7_p_pp_t)opt2_direct(cdr(arg)))(sc, lookup(sc, cadr(arg)),
-	   ((s7_p_pi_t)opt3_direct(cdr(arg)))(sc, lookup(sc, opt3_sym(arg)), integer(opt1_con(cdr(arg))))));
+           ((s7_p_pi_t)opt3_direct(cdr(arg)))(sc, lookup(sc, opt3_sym(arg)), integer(opt1_con(cdr(arg))))));
 }
 
 static s7_pointer fx_c_u_optiq_direct(s7_scheme *sc, s7_pointer arg)
 {
   return(((s7_p_pp_t)opt2_direct(cdr(arg)))(sc, u_lookup(sc, cadr(arg), arg),
-	   ((s7_p_pi_t)opt3_direct(cdr(arg)))(sc, t_lookup(sc, opt3_sym(arg), arg), integer(opt1_con(cdr(arg))))));
+           ((s7_p_pi_t)opt3_direct(cdr(arg)))(sc, t_lookup(sc, opt3_sym(arg), arg), integer(opt1_con(cdr(arg))))));
 }
 
 static s7_pointer fx_c_t_opoiq_direct(s7_scheme *sc, s7_pointer arg)
 {
   return(((s7_p_pp_t)opt2_direct(cdr(arg)))(sc, t_lookup(sc, cadr(arg), arg),
-	   ((s7_p_pi_t)opt3_direct(cdr(arg)))(sc, o_lookup(sc, opt3_sym(arg), arg), integer(opt1_con(cdr(arg))))));
+           ((s7_p_pi_t)opt3_direct(cdr(arg)))(sc, o_lookup(sc, opt3_sym(arg), arg), integer(opt1_con(cdr(arg))))));
 }
 
 static s7_pointer fx_vref_p1(s7_scheme *sc, s7_pointer arg)
@@ -55897,7 +55897,7 @@ static s7_pointer fx_vref_p1(s7_scheme *sc, s7_pointer arg)
     {
       s7_int index = integer(i) + 1;
       if ((index >= 0) && (vector_length(v) > index))
-	return(vector_element(v, index));
+        return(vector_element(v, index));
     }
   return(vector_ref_p_pp(sc, v, g_add_xi(sc, i, 1, 2)));
 }
@@ -55924,7 +55924,7 @@ static s7_pointer fx_num_eq_subtract_s_si(s7_scheme *sc, s7_pointer arg)
   static s7_pointer Name(s7_scheme *sc, s7_pointer arg) \
   { \
     return(((s7_p_pp_t)opt2_direct(cdr(arg)))(sc, t_lookup(sc, cadr(arg), arg), \
-	     ((s7_p_pp_t)opt3_direct(cdr(arg)))(sc, Lookup(sc, opt3_sym(arg), arg), opt1_con(cdr(arg))))); \
+             ((s7_p_pp_t)opt3_direct(cdr(arg)))(sc, Lookup(sc, opt3_sym(arg), arg), opt1_con(cdr(arg))))); \
   }
 
 fx_c_t_opscq_direct_any(fx_c_t_opscq_direct, s_lookup)
@@ -56052,7 +56052,7 @@ static s7_pointer fx_c_opsq_opsq(s7_scheme *sc, s7_pointer arg)
 static s7_pointer fx_c_opsq_opsq_direct(s7_scheme *sc, s7_pointer arg)
 {
   return(((s7_p_pp_t)opt3_direct(arg))(sc,
-	    ((s7_p_p_t)opt2_direct(cdr(arg)))(sc, lookup(sc, cadadr(arg))),          /* no free field in arg or cdr(arg) */
+            ((s7_p_p_t)opt2_direct(cdr(arg)))(sc, lookup(sc, cadadr(arg))),          /* no free field in arg or cdr(arg) */
             ((s7_p_p_t)opt3_direct(cdr(arg)))(sc, lookup(sc, opt1_sym(cdr(arg)))))); /* cadaddr(arg) */
 }
 
@@ -56080,7 +56080,7 @@ static s7_pointer fx_cdr_s_cdr_s(s7_scheme *sc, s7_pointer arg)
   s7_pointer p1 = lookup(sc, opt1_sym(cdr(arg)));
   s7_pointer p2 = lookup(sc, opt2_sym(cdr(arg)));  /* cadaddr(arg) */
   return(((s7_p_pp_t)opt3_direct(arg))(sc, (is_pair(p1)) ? cdr(p1) : g_cdr(sc, set_plist_1(sc, p1)),
-				           (is_pair(p2)) ? cdr(p2) : g_cdr(sc, set_plist_1(sc, p2))));
+                                           (is_pair(p2)) ? cdr(p2) : g_cdr(sc, set_plist_1(sc, p2))));
 }
 
 static s7_pointer fx_is_eq_car_car_tu(s7_scheme *sc, s7_pointer arg)
@@ -56109,7 +56109,7 @@ static s7_pointer fx_c_opsq_optuq_direct(s7_scheme *sc, s7_pointer arg)
 {
   s7_pointer largs = cdr(arg);
   return(((s7_p_pp_t)opt3_direct(arg))(sc,
-	    ((s7_p_p_t)opt2_direct(largs))(sc, lookup(sc, cadar(largs))),
+            ((s7_p_p_t)opt2_direct(largs))(sc, lookup(sc, cadar(largs))),
             ((s7_p_pp_t)opt3_direct(largs))(sc, t_lookup(sc, opt2_sym(cdr(largs)), arg), u_lookup(sc, opt1_sym(largs), arg))));
 }
 
@@ -56221,7 +56221,7 @@ static s7_pointer fx_sub_vref2(s7_scheme *sc, s7_pointer arg)
     {
       s7_int i1 = integer(p1), i2 = integer(p2);
       if ((i1 >= 0) && (i1 <= vector_length(v1)) && (i2 >= 0) && (i2 < vector_length(v1)))
-	return(subtract_p_pp(sc, vector_ref_p_pi(sc, v1, i1), vector_ref_p_pi(sc, v1, i2)));
+        return(subtract_p_pp(sc, vector_ref_p_pi(sc, v1, i1), vector_ref_p_pi(sc, v1, i2)));
     }
   return(subtract_p_pp(sc, vector_ref_p_pp(sc, v1, p1), vector_ref_p_pp(sc, v1, p2)));
 }
@@ -56656,7 +56656,7 @@ static s7_pointer fx_c_op_opssqq_s_direct(s7_scheme *sc, s7_pointer code)
   return(((s7_p_pp_t)opt3_direct(code))(sc,
             ((s7_p_p_t)opt2_direct(cdr(code)))(sc,
                ((s7_p_pp_t)opt3_direct(cdr(code)))(sc, lookup(sc, cadr(arg)), lookup(sc, caddr(arg)))),
-	    lookup(sc, caddr(code))));
+            lookup(sc, caddr(code))));
 }
 
 static s7_pointer fx_c_ns(s7_scheme *sc, s7_pointer arg)
@@ -56715,16 +56715,16 @@ static s7_pointer fx_inlet_ca(s7_scheme *sc, s7_pointer code)
       s7_pointer symbol = car(x), value;
       symbol = (is_symbol_and_keyword(symbol)) ? keyword_symbol(symbol) : cadr(symbol);  /* (inlet ':allow-other-keys 3) */
       if (is_constant_symbol(sc, symbol))     /* (inlet 'pi 1) */
-	{
-	  unstack_gc_protect(sc);
-	  wrong_type_error_nr(sc, sc->inlet_symbol, 1, symbol, a_non_constant_symbol_string);
-	}
+        {
+          unstack_gc_protect(sc);
+          wrong_type_error_nr(sc, sc->inlet_symbol, 1, symbol, a_non_constant_symbol_string);
+        }
       value = fx_call(sc, cdr(x));            /* it's necessary to do this first, before add_slot_unchecked */
       if (!sp)
-	{
-	  add_slot_unchecked_no_local(sc, new_e, symbol, value);
-	  sp = let_slots(new_e);
-	}
+        {
+          add_slot_unchecked_no_local(sc, new_e, symbol, value);
+          sp = let_slots(new_e);
+        }
       else sp = add_slot_at_end_no_local(sc, sp, symbol, value);
     }
   id = ++sc->let_number;
@@ -56836,18 +56836,18 @@ static s7_pointer fx_and_or_2a_vref(s7_scheme *sc, s7_pointer arg)
       s7_pointer ip = lookup(sc, opt3_sym(or1));
       s7_pointer jp = lookup(sc, opt1_sym(or1));
       if ((is_t_integer(ip)) && (is_t_integer(jp)))
-	{
-	  s7_int i = integer(ip), j = integer(jp);
-	  if ((i >= 0) && (j >= 0) &&
-	      (i < vector_length(v)) && (j < vector_length(v)) &&
-	      (is_t_real(vector_element(v, i))) && (is_t_real(vector_element(v, j))))
-	    {
-	      s7_pointer xp = lookup(sc, cadr(arg11));
-	      if (is_t_real(xp))
-		{
-		  s7_double vi = real(vector_element(v, i)), vj = real(vector_element(v, j)), xf = real(xp);
-		  return(make_boolean(sc, ((vi > xf) || (xf >= vj)) && ((vj > xf) || (xf >= vi))));
-		}}}}
+        {
+          s7_int i = integer(ip), j = integer(jp);
+          if ((i >= 0) && (j >= 0) &&
+              (i < vector_length(v)) && (j < vector_length(v)) &&
+              (is_t_real(vector_element(v, i))) && (is_t_real(vector_element(v, j))))
+            {
+              s7_pointer xp = lookup(sc, cadr(arg11));
+              if (is_t_real(xp))
+                {
+                  s7_double vi = real(vector_element(v, i)), vj = real(vector_element(v, j)), xf = real(xp);
+                  return(make_boolean(sc, ((vi > xf) || (xf >= vj)) && ((vj > xf) || (xf >= vi))));
+                }}}}
   return(fx_and_2a(sc, arg));
 }
 
@@ -57156,9 +57156,9 @@ static inline s7_pointer fx_cond_na_na(s7_scheme *sc, s7_pointer code)  /* all t
   for (s7_pointer p = cdr(code); is_pair(p); p = cdr(p))
     if (is_true(sc, fx_call(sc, car(p))))
       {
-	for (p = cdar(p); is_pair(cdr(p)); p = cdr(p))
-	  fx_call(sc, p);
-	return(fx_call(sc, p));
+        for (p = cdar(p); is_pair(cdr(p)); p = cdr(p))
+          fx_call(sc, p);
+        return(fx_call(sc, p));
       }
   return(sc->unspecified);
 }
@@ -57215,729 +57215,729 @@ static s7_function fx_choose(s7_scheme *sc, s7_pointer holder, s7_pointer cur_en
   if (!is_pair(arg))
     {
       if (is_symbol(arg))
-	{
-	  if (is_keyword(arg)) return(fx_c);
-	  if (arg == sc->else_symbol)
-	    {
-	      if (is_let(cur_env)) {if (s7_symbol_local_value(sc, arg, cur_env) == sc->else_symbol) return(fx_c);}
-	      else if ((is_pair(cur_env)) && (!direct_memq(arg, cur_env))) return(fx_c);
-	    }
-	  return((is_global(arg)) ? fx_g : ((checker(sc, arg, cur_env)) ? fx_s : fx_unsafe_s));
-	}
+        {
+          if (is_keyword(arg)) return(fx_c);
+          if (arg == sc->else_symbol)
+            {
+              if (is_let(cur_env)) {if (s7_symbol_local_value(sc, arg, cur_env) == sc->else_symbol) return(fx_c);}
+              else if ((is_pair(cur_env)) && (!direct_memq(arg, cur_env))) return(fx_c);
+            }
+          return((is_global(arg)) ? fx_g : ((checker(sc, arg, cur_env)) ? fx_s : fx_unsafe_s));
+        }
       return(fx_c);
     }
   if (is_optimized(arg))
     {
       switch (optimize_op(arg))
-	{
-	case HOP_SAFE_C_NC: /* includes 0-arg cases, newline/current-input|output-port, [make-]hash-table?, read-line, [float-]vector/list, gensym */
-	  if (cdr(arg) == sc->nil) return((fn_proc(arg) == g_read_char) ? fx_read_char_0 : fx_c_0c);
+        {
+        case HOP_SAFE_C_NC: /* includes 0-arg cases, newline/current-input|output-port, [make-]hash-table?, read-line, [float-]vector/list, gensym */
+          if (cdr(arg) == sc->nil) return((fn_proc(arg) == g_read_char) ? fx_read_char_0 : fx_c_0c);
 #if (!WITH_GMP)
-	  if (fn_proc(arg) == g_add_i_random) return(fx_add_i_random);
-#endif
-	  return((fn_proc(arg) == g_random_i) ? fx_random_i : ((fn_proc(arg) == g_cons) ? fx_cons_cc : fx_c_nc));
-
-	case OP_OR_2A:
-	  if (fx_proc(cddr(arg)) == fx_and_2a) {set_opt3_pair(arg, cdaddr(arg)); return(fx_or_and_2a);}
-	  if (fx_proc(cddr(arg)) == fx_and_3a) {set_opt3_pair(arg, cdaddr(arg)); return(fx_or_and_3a);}
-	  if ((fx_proc(cdr(arg)) == fx_not_is_symbol_s) && (fx_proc(cddr(arg)) == fx_is_keyword_s) && (cadr(cadadr(arg)) == cadaddr(arg)))
-	    {
-	      /* (or (not (symbol? body)) (keyword? body)) */
-	      set_opt3_sym(arg, cadaddr(arg));
-	      return(fx_not_symbol_or_keyword);
-	    }
-	  return(fx_or_2a);
-
-	case OP_AND_2A:
-	  if ((fx_proc(cdr(arg)) == fx_or_2a) && (fx_proc(cddr(arg)) == fx_or_2a))
-	    {
-	      s7_pointer o1 = cadr(arg), o2 = caddr(arg);
-	      if ((fx_proc(cdr(o1)) == fx_gt_vref_s) &&
-		  (fx_proc(cddr(o1)) == fx_geq_s_vref) &&
-		  (fx_proc(cdr(o2)) == fx_gt_vref_s) &&
-		  (fx_proc(cddr(o2)) == fx_geq_s_vref))
-		{
-		  s7_pointer v = cadr(cadadr(o1));
-		  if ((v == cadr(cadadr(o2))) && (v == (cadr(caddaddr(o1)))) && (v == (cadr(caddaddr(o2)))))
-		    {
-		      s7_pointer x = caddadr(o1);
-		      if ((x == caddadr(o2)) && (x == cadaddr(o1)) && (x == cadaddr(o2)))
-			{
-			  s7_pointer i = caddr(cadadr(o1)), j = caddaddr(caddr(o1));
-			  if ((j == caddr(cadadr(o2))) && (i == caddaddr(caddr(o2))))
-			    {
-			      set_opt1_sym(o1, j);
-			      set_opt3_sym(o1, i);
-			      return(fx_and_or_2a_vref);
-			    }}}}}
-	  return(fx_and_2a);
-
-	case HOP_SAFE_C_S:
-	  if (is_unchanged_global(car(arg))) /* mus-copy would work here but in tgen (for example) it's loading generators.scm with local mus-copy methods */
-	    {
-	      uint8_t typ;
-	      if (car(arg) == sc->cdr_symbol)            return(fx_cdr_s);
-	      if (car(arg) == sc->car_symbol)            return(fx_car_s);
-	      if (car(arg) == sc->cadr_symbol)           return(fx_cadr_s);
-	      if (car(arg) == sc->cddr_symbol)           return(fx_cddr_s);
-	      if (car(arg) == sc->is_null_symbol)        return(fx_is_null_s);
-	      if (car(arg) == sc->is_pair_symbol)        return(fx_is_pair_s);
-	      if (car(arg) == sc->is_symbol_symbol)      return(fx_is_symbol_s);
-	      if (car(arg) == sc->is_eof_object_symbol)  return(fx_is_eof_s);
-	      if (car(arg) == sc->is_integer_symbol)     return(fx_is_integer_s);
-	      if (car(arg) == sc->is_string_symbol)      return(fx_is_string_s);
-	      if (car(arg) == sc->not_symbol)            return(fx_not_s);
-	      if (car(arg) == sc->is_proper_list_symbol) return(fx_is_proper_list_s);
-	      if (car(arg) == sc->is_vector_symbol)      return(fx_is_vector_s);
-	      if (car(arg) == sc->is_keyword_symbol)     return(fx_is_keyword_s);
-	      if (car(arg) == sc->is_procedure_symbol)   return(fx_is_procedure_s);
-	      if (car(arg) == sc->length_symbol)         return(fx_length_s);
-	      /* not read_char here... */
-	      typ = symbol_type(car(arg));
-	      if (typ > 0)
-		{
-		  set_opt3_byte(cdr(arg), typ);
-		  return(fx_is_type_s);
-		}
-	      /* car_p_p (et al) does not look for a method so in:
-	       *    (define kar car) (load "mockery.scm") (let ((p (mock-pair '(1 2 3)))) (call-with-exit (lambda (x) (x (kar p)))))
-	       *  "kar" fails but not "car" because symbol_id(kar) == 0!  symbol_id(car) > 0 because mockery provides a method for it.
-	       */
-	      if (symbol_id(c_function_name_to_symbol(sc, global_value(car(arg)))) == 0)
-		{
-		  s7_p_p_t f = s7_p_p_function(global_value(car(arg)));
-		  if (f)
-		    {
-		      set_opt2_direct(cdr(arg), (s7_pointer)f);
-		      if (f == real_part_p_p) return(fx_real_part_s);
-		      if (f == imag_part_p_p) return(fx_imag_part_s);
-		      if (f == iterate_p_p)   return(fx_iterate_s);
-		      if (f == car_p_p)       return(fx_car_s); /* can happen if (define var-name car) etc */
-		      return((is_global(cadr(arg))) ? fx_c_g_direct : fx_c_s_direct);
-		    }}}
-	  return((is_global(cadr(arg))) ? fx_c_g : fx_c_s);
-
-	case HOP_SAFE_C_SS:
-	  if (fn_proc(arg) == g_cons)       return(fx_cons_ss);
-	  if (fx_matches(car(arg), sc->num_eq_symbol)) return(fx_num_eq_ss);
-	  if (fn_proc(arg) == g_geq_2)      return(fx_geq_ss);
-	  if (fn_proc(arg) == g_greater_2)  return(fx_gt_ss);
-	  if (fn_proc(arg) == g_leq_2)      return(fx_leq_ss);
-	  if (fn_proc(arg) == g_less_2)     return((is_global(caddr(arg))) ? fx_lt_sg : fx_lt_ss);
-	  if ((fx_matches(car(arg), sc->multiply_symbol)) && (cadr(arg) == caddr(arg))) return(fx_sqr_s);
-	  if (fn_proc(arg) == g_multiply_2) return(fx_multiply_ss);
-	  if (fn_proc(arg) == g_is_eq)      return(fx_is_eq_ss);
-	  if (fn_proc(arg) == g_add_2)      return(fx_add_ss);
-	  if (fn_proc(arg) == g_subtract_2) return(fx_subtract_ss);
-	  if (fn_proc(arg) == g_hash_table_ref_2) return(fx_hash_table_ref_ss);
-
-	  if (is_global_and_has_func(car(arg), s7_p_pp_function))
-	    {
-	      if (car(arg) == sc->assq_symbol) return(fx_assq_ss);
-	      if (car(arg) == sc->memq_symbol) return(fx_memq_ss);
-	      if (car(arg) == sc->vector_ref_symbol) return(fx_vref_ss);
-	      if (car(arg) == sc->string_ref_symbol) return(fx_sref_ss);
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      return(fx_c_ss_direct);
-	    }
-	  /* fx_c_ss_direct via b_7pp is slower than fx_c_ss + g_<> */
-	  return(fx_c_ss);
+          if (fn_proc(arg) == g_add_i_random) return(fx_add_i_random);
+#endif
+          return((fn_proc(arg) == g_random_i) ? fx_random_i : ((fn_proc(arg) == g_cons) ? fx_cons_cc : fx_c_nc));
+
+        case OP_OR_2A:
+          if (fx_proc(cddr(arg)) == fx_and_2a) {set_opt3_pair(arg, cdaddr(arg)); return(fx_or_and_2a);}
+          if (fx_proc(cddr(arg)) == fx_and_3a) {set_opt3_pair(arg, cdaddr(arg)); return(fx_or_and_3a);}
+          if ((fx_proc(cdr(arg)) == fx_not_is_symbol_s) && (fx_proc(cddr(arg)) == fx_is_keyword_s) && (cadr(cadadr(arg)) == cadaddr(arg)))
+            {
+              /* (or (not (symbol? body)) (keyword? body)) */
+              set_opt3_sym(arg, cadaddr(arg));
+              return(fx_not_symbol_or_keyword);
+            }
+          return(fx_or_2a);
+
+        case OP_AND_2A:
+          if ((fx_proc(cdr(arg)) == fx_or_2a) && (fx_proc(cddr(arg)) == fx_or_2a))
+            {
+              s7_pointer o1 = cadr(arg), o2 = caddr(arg);
+              if ((fx_proc(cdr(o1)) == fx_gt_vref_s) &&
+                  (fx_proc(cddr(o1)) == fx_geq_s_vref) &&
+                  (fx_proc(cdr(o2)) == fx_gt_vref_s) &&
+                  (fx_proc(cddr(o2)) == fx_geq_s_vref))
+                {
+                  s7_pointer v = cadr(cadadr(o1));
+                  if ((v == cadr(cadadr(o2))) && (v == (cadr(caddaddr(o1)))) && (v == (cadr(caddaddr(o2)))))
+                    {
+                      s7_pointer x = caddadr(o1);
+                      if ((x == caddadr(o2)) && (x == cadaddr(o1)) && (x == cadaddr(o2)))
+                        {
+                          s7_pointer i = caddr(cadadr(o1)), j = caddaddr(caddr(o1));
+                          if ((j == caddr(cadadr(o2))) && (i == caddaddr(caddr(o2))))
+                            {
+                              set_opt1_sym(o1, j);
+                              set_opt3_sym(o1, i);
+                              return(fx_and_or_2a_vref);
+                            }}}}}
+          return(fx_and_2a);
+
+        case HOP_SAFE_C_S:
+          if (is_unchanged_global(car(arg))) /* mus-copy would work here but in tgen (for example) it's loading generators.scm with local mus-copy methods */
+            {
+              uint8_t typ;
+              if (car(arg) == sc->cdr_symbol)            return(fx_cdr_s);
+              if (car(arg) == sc->car_symbol)            return(fx_car_s);
+              if (car(arg) == sc->cadr_symbol)           return(fx_cadr_s);
+              if (car(arg) == sc->cddr_symbol)           return(fx_cddr_s);
+              if (car(arg) == sc->is_null_symbol)        return(fx_is_null_s);
+              if (car(arg) == sc->is_pair_symbol)        return(fx_is_pair_s);
+              if (car(arg) == sc->is_symbol_symbol)      return(fx_is_symbol_s);
+              if (car(arg) == sc->is_eof_object_symbol)  return(fx_is_eof_s);
+              if (car(arg) == sc->is_integer_symbol)     return(fx_is_integer_s);
+              if (car(arg) == sc->is_string_symbol)      return(fx_is_string_s);
+              if (car(arg) == sc->not_symbol)            return(fx_not_s);
+              if (car(arg) == sc->is_proper_list_symbol) return(fx_is_proper_list_s);
+              if (car(arg) == sc->is_vector_symbol)      return(fx_is_vector_s);
+              if (car(arg) == sc->is_keyword_symbol)     return(fx_is_keyword_s);
+              if (car(arg) == sc->is_procedure_symbol)   return(fx_is_procedure_s);
+              if (car(arg) == sc->length_symbol)         return(fx_length_s);
+              /* not read_char here... */
+              typ = symbol_type(car(arg));
+              if (typ > 0)
+                {
+                  set_opt3_byte(cdr(arg), typ);
+                  return(fx_is_type_s);
+                }
+              /* car_p_p (et al) does not look for a method so in:
+               *    (define kar car) (load "mockery.scm") (let ((p (mock-pair '(1 2 3)))) (call-with-exit (lambda (x) (x (kar p)))))
+               *  "kar" fails but not "car" because symbol_id(kar) == 0!  symbol_id(car) > 0 because mockery provides a method for it.
+               */
+              if (symbol_id(c_function_name_to_symbol(sc, global_value(car(arg)))) == 0)
+                {
+                  s7_p_p_t f = s7_p_p_function(global_value(car(arg)));
+                  if (f)
+                    {
+                      set_opt2_direct(cdr(arg), (s7_pointer)f);
+                      if (f == real_part_p_p) return(fx_real_part_s);
+                      if (f == imag_part_p_p) return(fx_imag_part_s);
+                      if (f == iterate_p_p)   return(fx_iterate_s);
+                      if (f == car_p_p)       return(fx_car_s); /* can happen if (define var-name car) etc */
+                      return((is_global(cadr(arg))) ? fx_c_g_direct : fx_c_s_direct);
+                    }}}
+          return((is_global(cadr(arg))) ? fx_c_g : fx_c_s);
+
+        case HOP_SAFE_C_SS:
+          if (fn_proc(arg) == g_cons)       return(fx_cons_ss);
+          if (fx_matches(car(arg), sc->num_eq_symbol)) return(fx_num_eq_ss);
+          if (fn_proc(arg) == g_geq_2)      return(fx_geq_ss);
+          if (fn_proc(arg) == g_greater_2)  return(fx_gt_ss);
+          if (fn_proc(arg) == g_leq_2)      return(fx_leq_ss);
+          if (fn_proc(arg) == g_less_2)     return((is_global(caddr(arg))) ? fx_lt_sg : fx_lt_ss);
+          if ((fx_matches(car(arg), sc->multiply_symbol)) && (cadr(arg) == caddr(arg))) return(fx_sqr_s);
+          if (fn_proc(arg) == g_multiply_2) return(fx_multiply_ss);
+          if (fn_proc(arg) == g_is_eq)      return(fx_is_eq_ss);
+          if (fn_proc(arg) == g_add_2)      return(fx_add_ss);
+          if (fn_proc(arg) == g_subtract_2) return(fx_subtract_ss);
+          if (fn_proc(arg) == g_hash_table_ref_2) return(fx_hash_table_ref_ss);
+
+          if (is_global_and_has_func(car(arg), s7_p_pp_function))
+            {
+              if (car(arg) == sc->assq_symbol) return(fx_assq_ss);
+              if (car(arg) == sc->memq_symbol) return(fx_memq_ss);
+              if (car(arg) == sc->vector_ref_symbol) return(fx_vref_ss);
+              if (car(arg) == sc->string_ref_symbol) return(fx_sref_ss);
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              return(fx_c_ss_direct);
+            }
+          /* fx_c_ss_direct via b_7pp is slower than fx_c_ss + g_<> */
+          return(fx_c_ss);
 
         case HOP_SAFE_C_NS:
-	  if (fn_proc(arg) == g_list) return(fx_list_ns);    /* it is no faster here to divide out the big list cases!? */
-	  return((fn_proc(arg) == g_vector) ? fx_vector_ns : fx_c_ns);
-
-	case HOP_SAFE_C_opSq_S:
-	  if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
-	      (is_global_and_has_func(caadr(arg), s7_p_p_function)))
-	    {
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caadr(arg)))));
-	      return(((car(arg) == sc->cons_symbol) && (caadr(arg) == sc->car_symbol)) ? fx_cons_car_s_s : fx_c_opsq_s_direct);
-	    }
-	  return(fx_c_opsq_s);
-
-	case HOP_SAFE_C_SSS:
-	  if ((fn_proc(arg) == g_less) && (is_global(cadr(arg))) && (is_global(cadddr(arg)))) return(fx_lt_gsg);
-	  if (is_global_and_has_func(car(arg), s7_p_ppp_function))
-	    {
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_ppp_function(global_value(car(arg)))));
-	      return(fx_c_sss_direct);
-	    }
-	  return(fx_c_sss);
-
-	case HOP_SAFE_C_SSA:
-	  if (is_global_and_has_func(car(arg), s7_p_ppp_function))
-	    {
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_ppp_function(global_value(car(arg)))));
-	      return(fx_c_ssa_direct);
-	    }
-	  return(fx_c_ssa);
-
-	case HOP_SAFE_C_SCS:
-	  if (is_global_and_has_func(car(arg), s7_p_ppp_function))
-	    {
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_ppp_function(global_value(car(arg)))));
-	      return(fx_c_scs_direct);
-	    }
-	  return(fx_c_scs);
-
-	case HOP_SAFE_C_AAA:
-	  if ((fx_proc(cdr(arg)) == fx_g) && (fx_proc(cdddr(arg)) == fx_c)) return(fx_c_gac);
-	  if ((is_unquoted_pair(cadr(arg))) || (is_unquoted_pair(caddr(arg))) || (is_unquoted_pair(cadddr(arg)))) return(fx_c_aaa);
-	  return(fx_c_3g);
-
-	case HOP_SAFE_C_4A:
-	  set_opt3_pair(arg, cdddr(arg));
-	  for (s7_pointer p = cdr(arg); is_pair(p); p = cdr(p))
-	    if (is_unquoted_pair(car(p)))
-	      return(fx_c_4a);
-	  return(fx_c_4g); /* fx_c_ssaa doesn't save much */
-
-	case HOP_SAFE_C_S_opSSq:
-	  {
-	    s7_pointer s2 = caddr(arg);
-	    if ((fx_matches(car(s2), sc->multiply_symbol)) && (cadr(s2) == caddr(s2))) return(fx_c_s_sqr);
-
-	    if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
-		(is_global_and_has_func(car(s2), s7_p_pp_function)))
-	      {
-		set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-		set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(s2)))));
-		set_opt3_pair(arg, cdr(s2));
-		if (car(s2) == sc->vector_ref_symbol)
-		  {
-		    if (car(arg) == sc->add_symbol)      return(fx_add_s_vref);
-		    if (car(arg) == sc->subtract_symbol) return(fx_subtract_s_vref);
-		    if (car(arg) == sc->multiply_symbol) return(fx_multiply_s_vref);
-		    if (car(arg) == sc->geq_symbol)      return(fx_geq_s_vref);
-		    if (car(arg) == sc->is_eq_symbol)    return(fx_is_eq_s_vref);
-		    if (car(arg) == sc->hash_table_ref_symbol) return(fx_href_s_vref);
-		    if (car(arg) == sc->let_ref_symbol)  return(fx_lref_s_vref);
-		    if ((is_global(cadr(arg))) && (is_global(cadr(s2))) && (car(arg) == sc->vector_ref_symbol)) return(fx_vref_g_vref_gs);
-		  }
-		if ((car(arg) == sc->vector_ref_symbol) && (car(s2) == sc->add_symbol)) return(fx_vref_s_add);
-		return(fx_c_s_opssq_direct);
-	      }
-	    return(fx_c_s_opssq);
-	  }
-
-	case HOP_SAFE_C_opSSq_S:
-	  if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
-	      (is_global_and_has_func(caadr(arg), s7_p_pp_function)))
-	    {
-	      /* op_c_opgsq_t */
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caadr(arg)))));
-	      set_opt3_pair(arg, cdadr(arg));
-	      if (caadr(arg) == sc->vector_ref_symbol)
-		{
-		  if (car(arg) == sc->subtract_symbol) return(fx_subtract_vref_s);
-		  if (car(arg) == sc->gt_symbol) return(fx_gt_vref_s);
-		  if (car(arg) == sc->vector_ref_symbol) return(fx_vref_vref_ss_s);
-		  if (car(arg) == sc->add_symbol) return(fx_add_vref_s);
-		}
-	      if (car(arg) == sc->add_symbol)
-		{
-		  if ((caadr(arg) == sc->multiply_symbol) && (cadadr(arg) == caddadr(arg))) return(fx_add_sqr_s);
-		  if (caadr(arg) == sc->subtract_symbol) return(fx_add_sub_s);
-		}
-	      if ((car(arg) == sc->cons_symbol) && (caadr(arg) == sc->cons_symbol)) return(fx_cons_cons_s);
-	      /* also div(sub)[2] mul(div) */
-	      return(((car(arg) == sc->gt_symbol) && (caadr(arg) == sc->add_symbol)) ? fx_gt_add_s :
-		     (((car(arg) == sc->add_symbol) && (caadr(arg) == sc->multiply_symbol)) ? fx_add_mul_opssq_s : fx_c_opssq_s_direct));
-	    }
-	  return(fx_c_opssq_s);
-
-	case HOP_SAFE_C_opSSq_opSSq:
-	  {
-	    s7_pointer s1 = cadr(arg), s2 = caddr(arg);
-	    set_opt3_pair(arg, cdr(s2));
-	    if ((fx_matches(car(s1), sc->multiply_symbol)) && (car(s2) == sc->multiply_symbol))
-	      {
-		set_opt1_pair(cdr(arg), cdr(s1));
-		if (car(arg) == sc->subtract_symbol) return(fx_sub_mul_mul);
-		if (car(arg) == sc->add_symbol)
-		  return(((cadr(s1) == caddr(s1)) && (cadr(s2) == caddr(s2))) ? fx_add_sqr_sqr : fx_add_mul_mul);
-	      }
-	    if ((fx_matches(car(s1), sc->subtract_symbol)) && (car(s2) == sc->subtract_symbol))
-	      {
-		set_opt1_pair(cdr(arg), cdr(s1));
-		if (car(arg) == sc->multiply_symbol) return(fx_mul_sub_sub);
-		if (car(arg) == sc->lt_symbol) return(fx_lt_sub2);
-	      }
-	    if ((fx_matches(car(arg), sc->subtract_symbol)) &&
-		(fx_matches(car(s1), sc->vector_ref_symbol)) &&
-		(car(s2) == sc->vector_ref_symbol) &&
-		(cadr(s1) == cadr(s2)))
-	      {
-		set_opt3_sym(arg, cadr(cdaddr(arg)));
-		return(fx_sub_vref2);
-	      }
-	    return(fx_c_opssq_opssq);
-	  }
-
-	case HOP_SAFE_C_opSq:
-	  if (is_unchanged_global(caadr(arg)))
-	    {
-	      if (fx_matches(car(arg), sc->is_pair_symbol))
-		{
-		  if (caadr(arg) == sc->car_symbol)  {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_car_s);} /* (pair? ...) is ok, so loc can be sym? 7 in lg */
-		  if (caadr(arg) == sc->cdr_symbol)  {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_cdr_s);}
-		  if (caadr(arg) == sc->cadr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_cadr_s);}
-		  if (caadr(arg) == sc->cddr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_cddr_s);}
-		}
-	      if (fx_matches(car(arg), sc->is_null_symbol))
-		{
-		  if (caadr(arg) == sc->cdr_symbol)  {set_opt3_sym(arg, cadadr(arg)); return(fx_is_null_cdr_s);}
-		  if (caadr(arg) == sc->cadr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_null_cadr_s);}
-		  if (caadr(arg) == sc->cddr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_null_cddr_s);}
-		}
-	      if ((fx_matches(car(arg), sc->is_symbol_symbol)) &&
-		  (caadr(arg) == sc->cadr_symbol))
-		{set_opt3_sym(arg, cadadr(arg)); return(fx_is_symbol_cadr_s);}
-
-	      if (fx_matches(car(arg), sc->not_symbol))
-		{
-		  if (caadr(arg) == sc->is_pair_symbol)   {set_opt3_sym(arg, cadadr(arg)); return(fx_not_is_pair_s);}
-		  if (caadr(arg) == sc->is_null_symbol)   {set_opt3_sym(arg, cadadr(arg)); return(fx_not_is_null_s);}
-		  if (caadr(arg) == sc->is_symbol_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_not_is_symbol_s);}
-		  return(fx_not_opsq);
-		}
-	      if ((fx_matches(car(arg), sc->floor_symbol)) && (caadr(arg) == sc->sqrt_symbol))
-		{set_opt3_sym(arg, cadadr(arg)); return(fx_floor_sqrt_s);}
-	    }
-	  if (is_unchanged_global(car(arg))) /* (? (op arg)) where (op arg) might return a let with a ? method etc */
-	    {                                /* other possibility: fx_c_a */
-	      uint8_t typ = symbol_type(car(arg));
-	      if (typ > 0)                   /* h_safe_c here so the type checker isn't shadowed */
-		{
-		  set_opt3_sym(arg, cadadr(arg));
-		  set_opt3_byte(cdr(arg), typ);
-		  if (fn_proc(cadr(arg)) == (s7_function)g_c_pointer_weak1)
-		    return(fx_eq_weak1_type_s);
-		  return(fx_matches(caadr(arg), sc->car_symbol) ? fx_is_type_car_s : fx_is_type_opsq);
-		}}
-	  /* this should follow the is_type* check above */
-	  if (fx_matches(caadr(arg), sc->car_symbol))
-	    {
-	      set_opt3_sym(arg, cadadr(arg));
-	      return(fx_c_car_s);
-	    }
-	  if (fx_matches(caadr(arg), sc->cdr_symbol))
-	    {
-	      set_opt3_sym(arg, cadadr(arg));
-	      return(fx_c_cdr_s);
-	    }
-	  return(fx_c_opsq);
-
-	case HOP_SAFE_C_SC:
-	  if (is_unchanged_global(car(arg)))
-	    {
-	      if (car(arg) == sc->add_symbol)
-		{
-		  if (is_t_real(caddr(arg))) return(fx_add_sf);
-		  if (is_t_integer(caddr(arg))) return((integer(caddr(arg)) == 1) ? fx_add_s1 : fx_add_si);
-		}
-	      if (car(arg) == sc->subtract_symbol)
-		{
-		  if (is_t_real(caddr(arg))) return(fx_subtract_sf);
-		  if (is_t_integer(caddr(arg))) return((integer(caddr(arg)) == 1) ? fx_subtract_s1 : fx_subtract_si);
-		}
-	      if (car(arg) == sc->multiply_symbol)
-		{
-		  if (is_t_real(caddr(arg))) return(fx_multiply_sf);
-		  if (is_t_integer(caddr(arg))) return(fx_multiply_si);
-		}
-	      if ((fn_proc(arg) == g_memq_2) && (is_pair(caddr(arg)))) return(fx_memq_sq_2);
-	      if ((fn_proc(arg) == g_is_eq) && (!is_unspecified(caddr(arg)))) return(fx_is_eq_sc);
-
-	      if ((is_t_integer(caddr(arg))) && (s7_p_pi_function(global_value(car(arg)))))
-		{
-		  if (car(arg) == sc->num_eq_symbol) return((integer(caddr(arg)) == 0) ? fx_num_eq_s0 : fx_num_eq_si);
-		  if (car(arg) == sc->lt_symbol)  return(fx_lt_si);
-		  if (car(arg) == sc->leq_symbol) return(fx_leq_si);
-		  if (car(arg) == sc->gt_symbol)  return(fx_gt_si);
-		  if (car(arg) == sc->geq_symbol) return(fx_geq_si);
-		  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pi_function(global_value(car(arg)))));
-		  return(fx_c_si_direct);
-		}
-	      if ((is_t_real(caddr(arg))) && (real(caddr(arg)) == 0.0) && (car(arg) == sc->num_eq_symbol)) return(fx_num_eq_s0f);
-	      if ((s7_p_pp_function(global_value(car(arg)))) && (fn_proc(arg) != g_divide_by_2))
-		{
-		  if (car(arg) == sc->memq_symbol)
-		    {
-		      if ((is_pair(caddr(arg))) && (is_proper_list_3(sc, cadaddr(arg)))) return(fx_memq_sc_3);
-		      return(fx_memq_sc);
-		    }
-		  if ((car(arg) == sc->char_eq_symbol) && (is_character(caddr(arg)))) return(fx_char_eq_sc); /* maybe fx_char_eq_newline */
-		  if (car(arg) == sc->lt_symbol)  return(fx_lt_sc); /* integer case handled above */
-		  if (car(arg) == sc->leq_symbol) return(fx_leq_sc);
-		  if (car(arg) == sc->gt_symbol)  return(fx_gt_sc);
-		  if (car(arg) == sc->geq_symbol) return(fx_geq_sc);
-		  if (car(arg) == sc->list_symbol) return(fx_list_sc);
-		  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-		  return(fx_c_sc_direct);
-		}}
-	  return(fx_c_sc);
-
-	case HOP_SAFE_C_CS:
-	  if (is_unchanged_global(car(arg)))
-	    {
-	      if (car(arg) == sc->cons_symbol) return(fx_cons_cs);
-	      if ((car(arg) == sc->add_symbol) && (is_t_real(cadr(arg)))) return(fx_add_fs);
-	      if ((car(arg) == sc->subtract_symbol) && (is_t_real(cadr(arg)))) return(fx_subtract_fs);
-	      if ((car(arg) == sc->num_eq_symbol) && (cadr(arg) == int_zero))
-		{
-		  set_opt3_sym(arg, caddr(arg)); /* opt3_location is in use, but the num_eq is ok, so only symbol might care about that info? (or use cdr(arg)) */
-		  return(fx_num_eq_0s);
-		}
-	      if (car(arg) == sc->multiply_symbol)
-		{
-		  if (is_t_real(cadr(arg))) return(fx_multiply_fs);
-		  if (is_t_integer(cadr(arg))) return(fx_multiply_is);
-		}}
-	  return(fx_c_cs);
-
-	case HOP_SAFE_C_S_opSq:
-	  if (fx_matches(car(caddr(arg)), sc->car_symbol))
-	    {
-	      set_opt2_sym(cdr(arg), cadaddr(arg));
-	      if (fx_matches(car(arg), sc->hash_table_ref_symbol)) return(fx_hash_table_ref_car);
-	      return(fx_matches(car(arg), sc->add_symbol) ? fx_add_s_car_s : fx_c_s_car_s);
-	    }
-	  if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
-	      (is_global_and_has_func(caaddr(arg), s7_p_p_function)))
-	    {
-	      if ((car(arg) == sc->cons_symbol) && (caaddr(arg) == sc->cdr_symbol)) {set_opt2_sym(cdr(arg), cadaddr(arg)); return(fx_cons_s_cdr_s);}
-	      set_opt1_sym(cdr(arg), cadaddr(arg));
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caaddr(arg))))); /* arg opt3 only location, but no change in callgrind */
-	      return(fx_c_s_opsq_direct);
-	    }
-	  return(fx_c_s_opsq);
-
-	case HOP_SAFE_C_C_opSq:
-	  if (is_global_and_has_func(car(arg), s7_p_pp_function))
-	    {
-	      s7_pointer arg2 = caddr(arg);
-	      if (is_global_and_has_func(car(arg2), s7_p_p_function))
-		{
-		  set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-		  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(car(arg2)))));
-		  set_opt1_sym(cdr(arg), cadr(arg2));
-		  return(fx_c_c_opsq_direct);
-		}}
-	  return(fx_c_c_opsq);
-
-	case HOP_SAFE_C_opSq_C:
-	  if (is_unchanged_global(car(arg)))
-	    {
-	      if ((car(arg) == sc->memq_symbol) &&
-		  (fx_matches(caadr(arg), sc->car_symbol)) &&
-		  (is_proper_quote(sc, caddr(arg))) &&
-		  (is_pair(cadaddr(arg))))
-		return((s7_list_length(sc, opt2_con(cdr(arg))) == 2) ? fx_memq_car_s_2 : fx_memq_car_s);
-
-	      if (car(arg) == sc->is_eq_symbol)
-		{
-		  if (((fx_matches(caadr(arg), sc->car_symbol)) || (fx_matches(caadr(arg), sc->caar_symbol))) &&
-		      (is_proper_quote(sc, caddr(arg))))
-		    {
-		      set_opt3_sym(cdr(arg), cadadr(arg));
-		      set_opt2_con(cdr(arg), cadaddr(arg));
-		      return((caadr(arg) == sc->car_symbol) ? fx_is_eq_car_sq : fx_is_eq_caar_sq);
-		    }}
-	      if (((car(arg) == sc->lt_symbol) || (car(arg) == sc->num_eq_symbol)) &&
-		  (is_t_integer(caddr(arg))) &&
-		  (fx_matches(caadr(arg), sc->length_symbol)))
-		{
-		  set_opt3_sym(cdr(arg), cadadr(arg));
-		  set_opt3_con(arg, caddr(arg));
-		  return((car(arg) == sc->lt_symbol) ? fx_less_length_i : fx_num_eq_length_i);
-		}}
-	  set_opt1_sym(cdr(arg), cadadr(arg));
-	  return(fx_c_opsq_c);
-
-	case HOP_SAFE_C_op_opSqq:
-	  return((fx_matches(car(arg), sc->not_symbol)) ? ((fn_proc(cadr(arg)) == g_is_pair) ? fx_not_is_pair_opsq : fx_not_op_opsqq) : fx_c_op_opsqq);
-
-	case HOP_SAFE_C_opSCq:
-	  if (fx_matches(car(arg), sc->not_symbol))
-	    {
-	      if (fn_proc(cadr(arg)) == g_is_eq)
-		{
-		  set_opt3_sym(arg, cadadr(arg));
-		  set_opt3_con(cdr(arg), (is_pair(caddadr(arg))) ? cadaddr(cadr(arg)) : caddadr(arg));
-		  return(fx_not_is_eq_sq);
-		}
-	      return(fx_not_opscq);
-	    }
-	  return(fx_c_opscq);
-
-	case HOP_SAFE_C_S_opSCq:
-	  if (is_global_and_has_func(car(arg), s7_p_pp_function))
-	    {
-	      s7_pointer arg2 = caddr(arg);
-	      if ((is_global_and_has_func(car(arg2), s7_p_pi_function)) &&
-		  (is_t_integer(caddr(arg2))))
-		{
-		  set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-		  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pi_function(global_value(car(arg2)))));
-		  set_opt3_sym(arg, cadr(arg2));
-		  set_opt1_con(cdr(arg), caddr(arg2));
-		  if (car(arg) == sc->num_eq_symbol)
-		    {
-		      if (car(arg2) == sc->add_symbol) return(fx_num_eq_add_s_si);
-		      if (car(arg2) == sc->subtract_symbol) return(fx_num_eq_subtract_s_si);
-		    }
-		  if ((car(arg) == sc->vector_ref_symbol) && (car(arg2) == sc->add_symbol) && (integer(caddr(arg2)) == 1))
-		    return(fx_vref_p1);
-		  return(fx_c_s_opsiq_direct);
-		}
-	      if (is_global_and_has_func(car(arg2), s7_p_pp_function))
-		{
-		  set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-		  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg2)))));
-		  set_opt3_sym(arg, cadr(arg2));
-		  set_opt1_con(cdr(arg), (is_pair(caddr(arg2))) ? cadaddr(arg2) : caddr(arg2));
-		  return(fx_c_s_opscq_direct);
-		}}
-	  return(fx_c_s_opscq);
-
-	case HOP_SAFE_C_opSSq:
-	  if (fx_matches(car(arg), sc->not_symbol))
-	    {
-	      if (fn_proc(cadr(arg)) == g_is_eq) return(fx_not_is_eq_ss);
-	      return(fx_not_opssq);
-	    }
-	  if ((is_global_and_has_func(car(arg), s7_p_p_function)) &&
-	      (is_global_and_has_func(caadr(arg), s7_p_pp_function)))
-	    {
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(car(arg)))));
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caadr(arg)))));
-	      return(fx_c_opssq_direct);
-	    }
-	  return(fx_c_opssq);
-
-	case HOP_SAFE_C_C_opSSq:
-	  {
-	    s7_pointer s2 = caddr(arg);
-	    if ((fx_matches(car(s2), sc->multiply_symbol)) && (cadr(s2) == caddr(s2)))
-	      return(fx_c_c_sqr);
-	  }
-	  if ((is_small_real(cadr(arg))) &&
-	      (is_global_and_has_func(car(arg), s7_p_dd_function)) &&
-	      (is_global_and_has_func(caaddr(arg), s7_d_pd_function))) /* not * currently (this is for clm) */
-	    {
-	      set_opt3_direct(cdr(arg), s7_d_pd_function(global_value(caaddr(arg))));
-	      set_opt2_direct(cdr(arg), s7_p_dd_function(global_value(car(arg))));
-	      set_opt3_sym(arg, cadaddr(arg));
-	      set_opt1_sym(cdr(arg), caddaddr(arg));
-	      return(fx_c_nc_opssq_direct);
-	    }
-	  if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
-	      (is_global_and_has_func(caaddr(arg), s7_p_pp_function)))
-	    {
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caaddr(arg)))));
-	      set_opt3_sym(arg, cadaddr(arg));
-	      set_opt1_sym(cdr(arg), caddaddr(arg));
-	      if ((is_t_real(cadr(arg))) && (car(arg) == caaddr(arg)) && (car(arg) == sc->multiply_symbol)) return(fx_multiply_c_opssq);
-	      return(fx_c_c_opssq_direct);
-	    }
-	  return(fx_c_c_opssq);
-
-	case HOP_SAFE_C_opSq_opSq:
-	  if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
-	      (is_global_and_has_func(caadr(arg), s7_p_p_function)) &&
-	      (is_global_and_has_func(caaddr(arg), s7_p_p_function)))
-	    {
-	      set_opt3_direct(arg, (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caadr(arg)))));
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caaddr(arg)))));
-	      if ((caadr(arg) == caaddr(arg)) && ((caadr(arg) == sc->cdr_symbol) || (caadr(arg) == sc->car_symbol)))
-		{
-		  set_opt1_sym(cdr(arg), cadadr(arg));
-		  set_opt2_sym(cdr(arg), cadaddr(arg)); /* usable because we know func is cdr|car */
-		  return((caadr(arg) == sc->cdr_symbol) ? fx_cdr_s_cdr_s : fx_car_s_car_s);
-		}
-	      set_opt1_sym(cdr(arg), cadaddr(arg)); /* opt2 is taken by second func */
-	      return(fx_c_opsq_opsq_direct);
-	    }
-	  return(fx_c_opsq_opsq);
-
-	case HOP_SAFE_C_op_S_opSqq:
-	  return((fx_matches(car(arg), sc->not_symbol)) ? fx_not_op_s_opsqq : fx_c_op_s_opsqq);
-
-	case HOP_SAFE_C_op_opSSqq_S:
-	  if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
-	      (is_global_and_has_func(caadr(arg), s7_p_p_function)) &&
-	      (is_global_and_has_func(car(cadadr(arg)), s7_p_pp_function)))
-	    {
-	      set_opt3_direct(arg, (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caadr(arg)))));
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caadr(cadr(arg))))));
-	      return(fx_c_op_opssqq_s_direct);
-	    }
-	  return(fx_c_op_opssqq_s);
-
-	case HOP_SAFE_C_A:
-	  if (fx_matches(car(arg), sc->not_symbol))
-	    {
-	      if (fx_proc(cdr(arg)) == fx_is_eq_car_sq)
-		{
-		  set_opt1_sym(cdr(arg), cadadr(cadr(arg)));
-		  set_opt3_con(cdr(arg), cadaddr(cadr(arg)));
-		  return(fx_not_is_eq_car_sq);
-		}
-	      return(fx_not_a);
-	    }
-	  if (is_global_and_has_func(car(arg), s7_p_p_function))
-	    {
-	      set_opt3_direct(arg, (s7_pointer)(s7_p_p_function(global_value(car(arg)))));
-	      return(fx_c_a_direct);
-	    }
-	  return(fx_c_a);
-
-	case HOP_SAFE_C_AC:
-	  if (fn_proc(arg) == g_cons) return(fx_cons_ac);
-	  if (fx_matches(car(arg), sc->is_eq_symbol)) return(fx_is_eq_ac);
-	  if (is_global_and_has_func(car(arg), s7_p_pp_function))
-	    {
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      if ((opt3_direct(cdr(arg)) == (s7_pointer)string_ref_p_pp) && (is_t_integer(caddr(arg))) && (integer(caddr(arg)) == 0))
-		set_opt3_direct(cdr(arg), string_ref_p_p0);
-	      if (opt3_direct(cdr(arg)) == (s7_pointer)memq_p_pp)
-		{
-		  if (fn_proc(arg) == g_memq_2)
-		    set_opt3_direct(cdr(arg), (s7_pointer)memq_2_p_pp);
-		  else
-		    if ((is_pair(caddr(arg))) && (is_proper_list_3(sc, cadaddr(arg))))
-		      set_opt3_direct(cdr(arg), memq_3_p_pp);
-		    else
-		      if (fn_proc(arg) == g_memq_4)
-			set_opt3_direct(cdr(arg), memq_4_p_pp); /* this does not parallel 2 and 3 above (sigh) */
-		}
-	      else
-		if ((is_t_real(opt3_con(arg))) && (opt3_direct(cdr(arg)) == (s7_pointer)lt_p_pp))
-		  return(fx_lt_ad);
-	      if ((is_t_integer(opt3_con(arg))) && (s7_p_pi_function(global_value(car(arg)))))
-		{
-		  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pi_function(global_value(car(arg)))));
-		  if (integer(opt3_con(arg)) == 1)
-		    {
-		      if (opt3_direct(cdr(arg)) == (s7_pointer)g_sub_xi)
-			return(fx_sub_a1);
-		      if (opt3_direct(cdr(arg)) == (s7_pointer)add_p_pi)
-			return(fx_add_a1);
-		    }
-		  return(fx_c_ai_direct);
-		}
-	      return(fx_c_ac_direct);
-	    }
-	  return(fx_c_ac);
-
-	case HOP_SAFE_C_CA:
-	  return((fn_proc(arg) == g_cons) ? fx_cons_ca : fx_c_ca);
-
-	case HOP_SAFE_C_SA:
-	  if (fn_proc(arg) == g_multiply_2) return(fx_multiply_sa);
-	  if (fn_proc(arg) == g_add_2) return(fx_add_sa);
-	  if (is_global_and_has_func(car(arg), s7_p_pp_function))
-	    {
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      return((fn_proc(arg) == g_cons) ? fx_cons_sa : fx_c_sa_direct);
-	    }
-	  return(fx_c_sa);
-
-	case HOP_SAFE_C_AS:
-	  if (fn_proc(arg) == g_add_2) return(fx_add_as);
-	  if (is_global_and_has_func(car(arg), s7_p_pp_function))
-	    {
-	      set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
-	      return((fn_proc(arg) == g_cons) ? fx_cons_as : fx_c_as_direct);
-	    }
-	  return(fx_c_as);
-
-	case HOP_SAFE_C_AA:  /* (* wr (float-vector-ref rl 0 j)) (* wr (block-ref (vector-ref rl j) 0)) (- (float-vector-ref rl 0 i) tempr)  */
-	  if (fn_proc(arg) == g_add_2)            return(fx_add_aa);
-	  if (fn_proc(arg) == g_subtract_2)       return(fx_subtract_aa);
-	  if (fn_proc(arg) == g_multiply_2)       return(fx_multiply_aa);
-	  if (fn_proc(arg) == g_number_to_string) return(fx_number_to_string_aa);
-	  if (fn_proc(arg) == g_cons)             return(fx_cons_aa);
-	  return(fx_c_aa);
-
-	case HOP_SAFE_C_opAAq:
-	  return((fx_proc(cdadr(arg)) == fx_s) ? fx_c_opsaq : fx_c_opaaq);
-
-	case HOP_SAFE_C_NA:
-	  return((fn_proc(arg) == g_vector) ? fx_vector_na : fx_c_na);
-
-	case HOP_SAFE_C_ALL_CA:
-	  return((fn_proc(arg) == g_simple_inlet) ? fx_inlet_ca : fx_c_all_ca);
-
-	case HOP_SAFE_CLOSURE_S_A:
-	  {
-	    s7_pointer body = car(closure_body(opt1_lambda(arg)));
-	    if (is_pair(body))
-	      {
-		if (optimize_op(body) == OP_AND_2A)
-		  {
-		    if ((fx_matches(caadr(body), sc->is_pair_symbol)) &&
-			(cadadr(body) == car(closure_args(opt1_lambda(arg)))))
-		      return(fx_safe_closure_s_and_pair);       /* lint arg: (len>1? init), args: (x) body: (and (pair? x) (pair? (cdr x))) */
-		    return(fx_safe_closure_s_and_2a);
-		  }
-		if (optimize_op(body) == HOP_SAFE_C_opSq_C)
-		  {
-		    if ((fn_proc(body) == g_simple_let_ref) &&
-			(cadadr(body) == car(closure_args(opt1_lambda(arg)))))
-		      {
-			set_opt2_sym(cdr(arg), cadaddr(body));
-			return(fx_simple_let_ref_s); /* (var-ref local-var) -> (let-ref (cdr v=local_var) 'ref) */
-		      }}}
-	    return((fx_proc(closure_body(opt1_lambda(arg))) == fx_sqr_t) ? fx_safe_closure_s_sqr : fx_safe_closure_s_a);
-	  }
-
-	case HOP_SAFE_CLOSURE_S_TO_SC:
-	  {
-	    s7_pointer body = car(closure_body(opt1_lambda(arg)));
-	    if (fn_proc(body) == g_vector_ref_2) return(fx_safe_closure_s_to_vref);
-	    if ((is_t_integer(caddr(body))) && (integer(caddr(body)) == 1))
-	      {
-		if (car(body) == sc->subtract_symbol) return(fx_safe_closure_s_to_sub1);
-		if (car(body) == sc->add_symbol) return(fx_safe_closure_s_to_add1);
-	      }
-	    return(fx_safe_closure_s_to_sc);
-	  }
-
-	case HOP_SAFE_CLOSURE_A_TO_SC:
-	  return((fn_proc(car(closure_body(opt1_lambda(arg)))) == g_vector_ref_2) ? fx_safe_closure_a_to_vref : fx_safe_closure_a_to_sc);
-
-	case HOP_SAFE_CLOSURE_A_A:
-	  if (fx_proc(closure_body(opt1_lambda(arg))) == fx_and_2a)
-	    return(fx_safe_closure_a_and_2a);
-	  return((fx_proc(closure_body(opt1_lambda(arg))) == fx_sqr_t) ? fx_safe_closure_a_sqr : fx_safe_closure_a_a);
-
-	case HOP_SAFE_CLOSURE_3S_A:
-	  if (fx_proc(closure_body(opt1_lambda(arg))) == fx_vref_vref_tu_v) return(fx_vref_vref_3_no_let);
-	  return(fx_function[optimize_op(arg)]);
-
-	case OP_IMPLICIT_S7_STARLET_REF_S:
-	  if (opt3_int(arg) == SL_PRINT_LENGTH) return(fx_implicit_s7_starlet_print_length);
-	  if (opt3_int(arg) == SL_SAFETY) return(fx_implicit_s7_starlet_safety);
-	  return(fx_implicit_s7_starlet_ref_s);
-
-	case HOP_C:
-	  if ((is_unchanged_global(car(arg))) && (car(arg) == sc->curlet_symbol)) return(fx_curlet);
-	  /* fall through */
-
-	default:
-	  /* if ((S7_DEBUGGING) && (!fx_function[optimize_op(arg)]) && (is_h_optimized(arg))) fprintf(stderr, "fx_choose %s %s\n", op_names[optimize_op(arg)], display(arg)); */
-	  /* this includes unsafe c funcs (hop_c_a) and p-arg safe funcs (hop_safe_c_p) -- name needs "safe" and no "p" */
-	  return(fx_function[optimize_op(arg)]);
-	}} /* is_optimized */
+          if (fn_proc(arg) == g_list) return(fx_list_ns);    /* it is no faster here to divide out the big list cases!? */
+          return((fn_proc(arg) == g_vector) ? fx_vector_ns : fx_c_ns);
+
+        case HOP_SAFE_C_opSq_S:
+          if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
+              (is_global_and_has_func(caadr(arg), s7_p_p_function)))
+            {
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caadr(arg)))));
+              return(((car(arg) == sc->cons_symbol) && (caadr(arg) == sc->car_symbol)) ? fx_cons_car_s_s : fx_c_opsq_s_direct);
+            }
+          return(fx_c_opsq_s);
+
+        case HOP_SAFE_C_SSS:
+          if ((fn_proc(arg) == g_less) && (is_global(cadr(arg))) && (is_global(cadddr(arg)))) return(fx_lt_gsg);
+          if (is_global_and_has_func(car(arg), s7_p_ppp_function))
+            {
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_ppp_function(global_value(car(arg)))));
+              return(fx_c_sss_direct);
+            }
+          return(fx_c_sss);
+
+        case HOP_SAFE_C_SSA:
+          if (is_global_and_has_func(car(arg), s7_p_ppp_function))
+            {
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_ppp_function(global_value(car(arg)))));
+              return(fx_c_ssa_direct);
+            }
+          return(fx_c_ssa);
+
+        case HOP_SAFE_C_SCS:
+          if (is_global_and_has_func(car(arg), s7_p_ppp_function))
+            {
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_ppp_function(global_value(car(arg)))));
+              return(fx_c_scs_direct);
+            }
+          return(fx_c_scs);
+
+        case HOP_SAFE_C_AAA:
+          if ((fx_proc(cdr(arg)) == fx_g) && (fx_proc(cdddr(arg)) == fx_c)) return(fx_c_gac);
+          if ((is_unquoted_pair(cadr(arg))) || (is_unquoted_pair(caddr(arg))) || (is_unquoted_pair(cadddr(arg)))) return(fx_c_aaa);
+          return(fx_c_3g);
+
+        case HOP_SAFE_C_4A:
+          set_opt3_pair(arg, cdddr(arg));
+          for (s7_pointer p = cdr(arg); is_pair(p); p = cdr(p))
+            if (is_unquoted_pair(car(p)))
+              return(fx_c_4a);
+          return(fx_c_4g); /* fx_c_ssaa doesn't save much */
+
+        case HOP_SAFE_C_S_opSSq:
+          {
+            s7_pointer s2 = caddr(arg);
+            if ((fx_matches(car(s2), sc->multiply_symbol)) && (cadr(s2) == caddr(s2))) return(fx_c_s_sqr);
+
+            if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
+                (is_global_and_has_func(car(s2), s7_p_pp_function)))
+              {
+                set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+                set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(s2)))));
+                set_opt3_pair(arg, cdr(s2));
+                if (car(s2) == sc->vector_ref_symbol)
+                  {
+                    if (car(arg) == sc->add_symbol)      return(fx_add_s_vref);
+                    if (car(arg) == sc->subtract_symbol) return(fx_subtract_s_vref);
+                    if (car(arg) == sc->multiply_symbol) return(fx_multiply_s_vref);
+                    if (car(arg) == sc->geq_symbol)      return(fx_geq_s_vref);
+                    if (car(arg) == sc->is_eq_symbol)    return(fx_is_eq_s_vref);
+                    if (car(arg) == sc->hash_table_ref_symbol) return(fx_href_s_vref);
+                    if (car(arg) == sc->let_ref_symbol)  return(fx_lref_s_vref);
+                    if ((is_global(cadr(arg))) && (is_global(cadr(s2))) && (car(arg) == sc->vector_ref_symbol)) return(fx_vref_g_vref_gs);
+                  }
+                if ((car(arg) == sc->vector_ref_symbol) && (car(s2) == sc->add_symbol)) return(fx_vref_s_add);
+                return(fx_c_s_opssq_direct);
+              }
+            return(fx_c_s_opssq);
+          }
+
+        case HOP_SAFE_C_opSSq_S:
+          if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
+              (is_global_and_has_func(caadr(arg), s7_p_pp_function)))
+            {
+              /* op_c_opgsq_t */
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caadr(arg)))));
+              set_opt3_pair(arg, cdadr(arg));
+              if (caadr(arg) == sc->vector_ref_symbol)
+                {
+                  if (car(arg) == sc->subtract_symbol) return(fx_subtract_vref_s);
+                  if (car(arg) == sc->gt_symbol) return(fx_gt_vref_s);
+                  if (car(arg) == sc->vector_ref_symbol) return(fx_vref_vref_ss_s);
+                  if (car(arg) == sc->add_symbol) return(fx_add_vref_s);
+                }
+              if (car(arg) == sc->add_symbol)
+                {
+                  if ((caadr(arg) == sc->multiply_symbol) && (cadadr(arg) == caddadr(arg))) return(fx_add_sqr_s);
+                  if (caadr(arg) == sc->subtract_symbol) return(fx_add_sub_s);
+                }
+              if ((car(arg) == sc->cons_symbol) && (caadr(arg) == sc->cons_symbol)) return(fx_cons_cons_s);
+              /* also div(sub)[2] mul(div) */
+              return(((car(arg) == sc->gt_symbol) && (caadr(arg) == sc->add_symbol)) ? fx_gt_add_s :
+                     (((car(arg) == sc->add_symbol) && (caadr(arg) == sc->multiply_symbol)) ? fx_add_mul_opssq_s : fx_c_opssq_s_direct));
+            }
+          return(fx_c_opssq_s);
+
+        case HOP_SAFE_C_opSSq_opSSq:
+          {
+            s7_pointer s1 = cadr(arg), s2 = caddr(arg);
+            set_opt3_pair(arg, cdr(s2));
+            if ((fx_matches(car(s1), sc->multiply_symbol)) && (car(s2) == sc->multiply_symbol))
+              {
+                set_opt1_pair(cdr(arg), cdr(s1));
+                if (car(arg) == sc->subtract_symbol) return(fx_sub_mul_mul);
+                if (car(arg) == sc->add_symbol)
+                  return(((cadr(s1) == caddr(s1)) && (cadr(s2) == caddr(s2))) ? fx_add_sqr_sqr : fx_add_mul_mul);
+              }
+            if ((fx_matches(car(s1), sc->subtract_symbol)) && (car(s2) == sc->subtract_symbol))
+              {
+                set_opt1_pair(cdr(arg), cdr(s1));
+                if (car(arg) == sc->multiply_symbol) return(fx_mul_sub_sub);
+                if (car(arg) == sc->lt_symbol) return(fx_lt_sub2);
+              }
+            if ((fx_matches(car(arg), sc->subtract_symbol)) &&
+                (fx_matches(car(s1), sc->vector_ref_symbol)) &&
+                (car(s2) == sc->vector_ref_symbol) &&
+                (cadr(s1) == cadr(s2)))
+              {
+                set_opt3_sym(arg, cadr(cdaddr(arg)));
+                return(fx_sub_vref2);
+              }
+            return(fx_c_opssq_opssq);
+          }
+
+        case HOP_SAFE_C_opSq:
+          if (is_unchanged_global(caadr(arg)))
+            {
+              if (fx_matches(car(arg), sc->is_pair_symbol))
+                {
+                  if (caadr(arg) == sc->car_symbol)  {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_car_s);} /* (pair? ...) is ok, so loc can be sym? 7 in lg */
+                  if (caadr(arg) == sc->cdr_symbol)  {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_cdr_s);}
+                  if (caadr(arg) == sc->cadr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_cadr_s);}
+                  if (caadr(arg) == sc->cddr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_pair_cddr_s);}
+                }
+              if (fx_matches(car(arg), sc->is_null_symbol))
+                {
+                  if (caadr(arg) == sc->cdr_symbol)  {set_opt3_sym(arg, cadadr(arg)); return(fx_is_null_cdr_s);}
+                  if (caadr(arg) == sc->cadr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_null_cadr_s);}
+                  if (caadr(arg) == sc->cddr_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_is_null_cddr_s);}
+                }
+              if ((fx_matches(car(arg), sc->is_symbol_symbol)) &&
+                  (caadr(arg) == sc->cadr_symbol))
+                {set_opt3_sym(arg, cadadr(arg)); return(fx_is_symbol_cadr_s);}
+
+              if (fx_matches(car(arg), sc->not_symbol))
+                {
+                  if (caadr(arg) == sc->is_pair_symbol)   {set_opt3_sym(arg, cadadr(arg)); return(fx_not_is_pair_s);}
+                  if (caadr(arg) == sc->is_null_symbol)   {set_opt3_sym(arg, cadadr(arg)); return(fx_not_is_null_s);}
+                  if (caadr(arg) == sc->is_symbol_symbol) {set_opt3_sym(arg, cadadr(arg)); return(fx_not_is_symbol_s);}
+                  return(fx_not_opsq);
+                }
+              if ((fx_matches(car(arg), sc->floor_symbol)) && (caadr(arg) == sc->sqrt_symbol))
+                {set_opt3_sym(arg, cadadr(arg)); return(fx_floor_sqrt_s);}
+            }
+          if (is_unchanged_global(car(arg))) /* (? (op arg)) where (op arg) might return a let with a ? method etc */
+            {                                /* other possibility: fx_c_a */
+              uint8_t typ = symbol_type(car(arg));
+              if (typ > 0)                   /* h_safe_c here so the type checker isn't shadowed */
+                {
+                  set_opt3_sym(arg, cadadr(arg));
+                  set_opt3_byte(cdr(arg), typ);
+                  if (fn_proc(cadr(arg)) == (s7_function)g_c_pointer_weak1)
+                    return(fx_eq_weak1_type_s);
+                  return(fx_matches(caadr(arg), sc->car_symbol) ? fx_is_type_car_s : fx_is_type_opsq);
+                }}
+          /* this should follow the is_type* check above */
+          if (fx_matches(caadr(arg), sc->car_symbol))
+            {
+              set_opt3_sym(arg, cadadr(arg));
+              return(fx_c_car_s);
+            }
+          if (fx_matches(caadr(arg), sc->cdr_symbol))
+            {
+              set_opt3_sym(arg, cadadr(arg));
+              return(fx_c_cdr_s);
+            }
+          return(fx_c_opsq);
+
+        case HOP_SAFE_C_SC:
+          if (is_unchanged_global(car(arg)))
+            {
+              if (car(arg) == sc->add_symbol)
+                {
+                  if (is_t_real(caddr(arg))) return(fx_add_sf);
+                  if (is_t_integer(caddr(arg))) return((integer(caddr(arg)) == 1) ? fx_add_s1 : fx_add_si);
+                }
+              if (car(arg) == sc->subtract_symbol)
+                {
+                  if (is_t_real(caddr(arg))) return(fx_subtract_sf);
+                  if (is_t_integer(caddr(arg))) return((integer(caddr(arg)) == 1) ? fx_subtract_s1 : fx_subtract_si);
+                }
+              if (car(arg) == sc->multiply_symbol)
+                {
+                  if (is_t_real(caddr(arg))) return(fx_multiply_sf);
+                  if (is_t_integer(caddr(arg))) return(fx_multiply_si);
+                }
+              if ((fn_proc(arg) == g_memq_2) && (is_pair(caddr(arg)))) return(fx_memq_sq_2);
+              if ((fn_proc(arg) == g_is_eq) && (!is_unspecified(caddr(arg)))) return(fx_is_eq_sc);
+
+              if ((is_t_integer(caddr(arg))) && (s7_p_pi_function(global_value(car(arg)))))
+                {
+                  if (car(arg) == sc->num_eq_symbol) return((integer(caddr(arg)) == 0) ? fx_num_eq_s0 : fx_num_eq_si);
+                  if (car(arg) == sc->lt_symbol)  return(fx_lt_si);
+                  if (car(arg) == sc->leq_symbol) return(fx_leq_si);
+                  if (car(arg) == sc->gt_symbol)  return(fx_gt_si);
+                  if (car(arg) == sc->geq_symbol) return(fx_geq_si);
+                  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pi_function(global_value(car(arg)))));
+                  return(fx_c_si_direct);
+                }
+              if ((is_t_real(caddr(arg))) && (real(caddr(arg)) == 0.0) && (car(arg) == sc->num_eq_symbol)) return(fx_num_eq_s0f);
+              if ((s7_p_pp_function(global_value(car(arg)))) && (fn_proc(arg) != g_divide_by_2))
+                {
+                  if (car(arg) == sc->memq_symbol)
+                    {
+                      if ((is_pair(caddr(arg))) && (is_proper_list_3(sc, cadaddr(arg)))) return(fx_memq_sc_3);
+                      return(fx_memq_sc);
+                    }
+                  if ((car(arg) == sc->char_eq_symbol) && (is_character(caddr(arg)))) return(fx_char_eq_sc); /* maybe fx_char_eq_newline */
+                  if (car(arg) == sc->lt_symbol)  return(fx_lt_sc); /* integer case handled above */
+                  if (car(arg) == sc->leq_symbol) return(fx_leq_sc);
+                  if (car(arg) == sc->gt_symbol)  return(fx_gt_sc);
+                  if (car(arg) == sc->geq_symbol) return(fx_geq_sc);
+                  if (car(arg) == sc->list_symbol) return(fx_list_sc);
+                  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+                  return(fx_c_sc_direct);
+                }}
+          return(fx_c_sc);
+
+        case HOP_SAFE_C_CS:
+          if (is_unchanged_global(car(arg)))
+            {
+              if (car(arg) == sc->cons_symbol) return(fx_cons_cs);
+              if ((car(arg) == sc->add_symbol) && (is_t_real(cadr(arg)))) return(fx_add_fs);
+              if ((car(arg) == sc->subtract_symbol) && (is_t_real(cadr(arg)))) return(fx_subtract_fs);
+              if ((car(arg) == sc->num_eq_symbol) && (cadr(arg) == int_zero))
+                {
+                  set_opt3_sym(arg, caddr(arg)); /* opt3_location is in use, but the num_eq is ok, so only symbol might care about that info? (or use cdr(arg)) */
+                  return(fx_num_eq_0s);
+                }
+              if (car(arg) == sc->multiply_symbol)
+                {
+                  if (is_t_real(cadr(arg))) return(fx_multiply_fs);
+                  if (is_t_integer(cadr(arg))) return(fx_multiply_is);
+                }}
+          return(fx_c_cs);
+
+        case HOP_SAFE_C_S_opSq:
+          if (fx_matches(car(caddr(arg)), sc->car_symbol))
+            {
+              set_opt2_sym(cdr(arg), cadaddr(arg));
+              if (fx_matches(car(arg), sc->hash_table_ref_symbol)) return(fx_hash_table_ref_car);
+              return(fx_matches(car(arg), sc->add_symbol) ? fx_add_s_car_s : fx_c_s_car_s);
+            }
+          if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
+              (is_global_and_has_func(caaddr(arg), s7_p_p_function)))
+            {
+              if ((car(arg) == sc->cons_symbol) && (caaddr(arg) == sc->cdr_symbol)) {set_opt2_sym(cdr(arg), cadaddr(arg)); return(fx_cons_s_cdr_s);}
+              set_opt1_sym(cdr(arg), cadaddr(arg));
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caaddr(arg))))); /* arg opt3 only location, but no change in callgrind */
+              return(fx_c_s_opsq_direct);
+            }
+          return(fx_c_s_opsq);
+
+        case HOP_SAFE_C_C_opSq:
+          if (is_global_and_has_func(car(arg), s7_p_pp_function))
+            {
+              s7_pointer arg2 = caddr(arg);
+              if (is_global_and_has_func(car(arg2), s7_p_p_function))
+                {
+                  set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+                  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(car(arg2)))));
+                  set_opt1_sym(cdr(arg), cadr(arg2));
+                  return(fx_c_c_opsq_direct);
+                }}
+          return(fx_c_c_opsq);
+
+        case HOP_SAFE_C_opSq_C:
+          if (is_unchanged_global(car(arg)))
+            {
+              if ((car(arg) == sc->memq_symbol) &&
+                  (fx_matches(caadr(arg), sc->car_symbol)) &&
+                  (is_proper_quote(sc, caddr(arg))) &&
+                  (is_pair(cadaddr(arg))))
+                return((s7_list_length(sc, opt2_con(cdr(arg))) == 2) ? fx_memq_car_s_2 : fx_memq_car_s);
+
+              if (car(arg) == sc->is_eq_symbol)
+                {
+                  if (((fx_matches(caadr(arg), sc->car_symbol)) || (fx_matches(caadr(arg), sc->caar_symbol))) &&
+                      (is_proper_quote(sc, caddr(arg))))
+                    {
+                      set_opt3_sym(cdr(arg), cadadr(arg));
+                      set_opt2_con(cdr(arg), cadaddr(arg));
+                      return((caadr(arg) == sc->car_symbol) ? fx_is_eq_car_sq : fx_is_eq_caar_sq);
+                    }}
+              if (((car(arg) == sc->lt_symbol) || (car(arg) == sc->num_eq_symbol)) &&
+                  (is_t_integer(caddr(arg))) &&
+                  (fx_matches(caadr(arg), sc->length_symbol)))
+                {
+                  set_opt3_sym(cdr(arg), cadadr(arg));
+                  set_opt3_con(arg, caddr(arg));
+                  return((car(arg) == sc->lt_symbol) ? fx_less_length_i : fx_num_eq_length_i);
+                }}
+          set_opt1_sym(cdr(arg), cadadr(arg));
+          return(fx_c_opsq_c);
+
+        case HOP_SAFE_C_op_opSqq:
+          return((fx_matches(car(arg), sc->not_symbol)) ? ((fn_proc(cadr(arg)) == g_is_pair) ? fx_not_is_pair_opsq : fx_not_op_opsqq) : fx_c_op_opsqq);
+
+        case HOP_SAFE_C_opSCq:
+          if (fx_matches(car(arg), sc->not_symbol))
+            {
+              if (fn_proc(cadr(arg)) == g_is_eq)
+                {
+                  set_opt3_sym(arg, cadadr(arg));
+                  set_opt3_con(cdr(arg), (is_pair(caddadr(arg))) ? cadaddr(cadr(arg)) : caddadr(arg));
+                  return(fx_not_is_eq_sq);
+                }
+              return(fx_not_opscq);
+            }
+          return(fx_c_opscq);
+
+        case HOP_SAFE_C_S_opSCq:
+          if (is_global_and_has_func(car(arg), s7_p_pp_function))
+            {
+              s7_pointer arg2 = caddr(arg);
+              if ((is_global_and_has_func(car(arg2), s7_p_pi_function)) &&
+                  (is_t_integer(caddr(arg2))))
+                {
+                  set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+                  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pi_function(global_value(car(arg2)))));
+                  set_opt3_sym(arg, cadr(arg2));
+                  set_opt1_con(cdr(arg), caddr(arg2));
+                  if (car(arg) == sc->num_eq_symbol)
+                    {
+                      if (car(arg2) == sc->add_symbol) return(fx_num_eq_add_s_si);
+                      if (car(arg2) == sc->subtract_symbol) return(fx_num_eq_subtract_s_si);
+                    }
+                  if ((car(arg) == sc->vector_ref_symbol) && (car(arg2) == sc->add_symbol) && (integer(caddr(arg2)) == 1))
+                    return(fx_vref_p1);
+                  return(fx_c_s_opsiq_direct);
+                }
+              if (is_global_and_has_func(car(arg2), s7_p_pp_function))
+                {
+                  set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+                  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg2)))));
+                  set_opt3_sym(arg, cadr(arg2));
+                  set_opt1_con(cdr(arg), (is_pair(caddr(arg2))) ? cadaddr(arg2) : caddr(arg2));
+                  return(fx_c_s_opscq_direct);
+                }}
+          return(fx_c_s_opscq);
+
+        case HOP_SAFE_C_opSSq:
+          if (fx_matches(car(arg), sc->not_symbol))
+            {
+              if (fn_proc(cadr(arg)) == g_is_eq) return(fx_not_is_eq_ss);
+              return(fx_not_opssq);
+            }
+          if ((is_global_and_has_func(car(arg), s7_p_p_function)) &&
+              (is_global_and_has_func(caadr(arg), s7_p_pp_function)))
+            {
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(car(arg)))));
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caadr(arg)))));
+              return(fx_c_opssq_direct);
+            }
+          return(fx_c_opssq);
+
+        case HOP_SAFE_C_C_opSSq:
+          {
+            s7_pointer s2 = caddr(arg);
+            if ((fx_matches(car(s2), sc->multiply_symbol)) && (cadr(s2) == caddr(s2)))
+              return(fx_c_c_sqr);
+          }
+          if ((is_small_real(cadr(arg))) &&
+              (is_global_and_has_func(car(arg), s7_p_dd_function)) &&
+              (is_global_and_has_func(caaddr(arg), s7_d_pd_function))) /* not * currently (this is for clm) */
+            {
+              set_opt3_direct(cdr(arg), s7_d_pd_function(global_value(caaddr(arg))));
+              set_opt2_direct(cdr(arg), s7_p_dd_function(global_value(car(arg))));
+              set_opt3_sym(arg, cadaddr(arg));
+              set_opt1_sym(cdr(arg), caddaddr(arg));
+              return(fx_c_nc_opssq_direct);
+            }
+          if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
+              (is_global_and_has_func(caaddr(arg), s7_p_pp_function)))
+            {
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caaddr(arg)))));
+              set_opt3_sym(arg, cadaddr(arg));
+              set_opt1_sym(cdr(arg), caddaddr(arg));
+              if ((is_t_real(cadr(arg))) && (car(arg) == caaddr(arg)) && (car(arg) == sc->multiply_symbol)) return(fx_multiply_c_opssq);
+              return(fx_c_c_opssq_direct);
+            }
+          return(fx_c_c_opssq);
+
+        case HOP_SAFE_C_opSq_opSq:
+          if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
+              (is_global_and_has_func(caadr(arg), s7_p_p_function)) &&
+              (is_global_and_has_func(caaddr(arg), s7_p_p_function)))
+            {
+              set_opt3_direct(arg, (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caadr(arg)))));
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caaddr(arg)))));
+              if ((caadr(arg) == caaddr(arg)) && ((caadr(arg) == sc->cdr_symbol) || (caadr(arg) == sc->car_symbol)))
+                {
+                  set_opt1_sym(cdr(arg), cadadr(arg));
+                  set_opt2_sym(cdr(arg), cadaddr(arg)); /* usable because we know func is cdr|car */
+                  return((caadr(arg) == sc->cdr_symbol) ? fx_cdr_s_cdr_s : fx_car_s_car_s);
+                }
+              set_opt1_sym(cdr(arg), cadaddr(arg)); /* opt2 is taken by second func */
+              return(fx_c_opsq_opsq_direct);
+            }
+          return(fx_c_opsq_opsq);
+
+        case HOP_SAFE_C_op_S_opSqq:
+          return((fx_matches(car(arg), sc->not_symbol)) ? fx_not_op_s_opsqq : fx_c_op_s_opsqq);
+
+        case HOP_SAFE_C_op_opSSqq_S:
+          if ((is_global_and_has_func(car(arg), s7_p_pp_function)) &&
+              (is_global_and_has_func(caadr(arg), s7_p_p_function)) &&
+              (is_global_and_has_func(car(cadadr(arg)), s7_p_pp_function)))
+            {
+              set_opt3_direct(arg, (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              set_opt2_direct(cdr(arg), (s7_pointer)(s7_p_p_function(global_value(caadr(arg)))));
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(caadr(cadr(arg))))));
+              return(fx_c_op_opssqq_s_direct);
+            }
+          return(fx_c_op_opssqq_s);
+
+        case HOP_SAFE_C_A:
+          if (fx_matches(car(arg), sc->not_symbol))
+            {
+              if (fx_proc(cdr(arg)) == fx_is_eq_car_sq)
+                {
+                  set_opt1_sym(cdr(arg), cadadr(cadr(arg)));
+                  set_opt3_con(cdr(arg), cadaddr(cadr(arg)));
+                  return(fx_not_is_eq_car_sq);
+                }
+              return(fx_not_a);
+            }
+          if (is_global_and_has_func(car(arg), s7_p_p_function))
+            {
+              set_opt3_direct(arg, (s7_pointer)(s7_p_p_function(global_value(car(arg)))));
+              return(fx_c_a_direct);
+            }
+          return(fx_c_a);
+
+        case HOP_SAFE_C_AC:
+          if (fn_proc(arg) == g_cons) return(fx_cons_ac);
+          if (fx_matches(car(arg), sc->is_eq_symbol)) return(fx_is_eq_ac);
+          if (is_global_and_has_func(car(arg), s7_p_pp_function))
+            {
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              if ((opt3_direct(cdr(arg)) == (s7_pointer)string_ref_p_pp) && (is_t_integer(caddr(arg))) && (integer(caddr(arg)) == 0))
+                set_opt3_direct(cdr(arg), string_ref_p_p0);
+              if (opt3_direct(cdr(arg)) == (s7_pointer)memq_p_pp)
+                {
+                  if (fn_proc(arg) == g_memq_2)
+                    set_opt3_direct(cdr(arg), (s7_pointer)memq_2_p_pp);
+                  else
+                    if ((is_pair(caddr(arg))) && (is_proper_list_3(sc, cadaddr(arg))))
+                      set_opt3_direct(cdr(arg), memq_3_p_pp);
+                    else
+                      if (fn_proc(arg) == g_memq_4)
+                        set_opt3_direct(cdr(arg), memq_4_p_pp); /* this does not parallel 2 and 3 above (sigh) */
+                }
+              else
+                if ((is_t_real(opt3_con(arg))) && (opt3_direct(cdr(arg)) == (s7_pointer)lt_p_pp))
+                  return(fx_lt_ad);
+              if ((is_t_integer(opt3_con(arg))) && (s7_p_pi_function(global_value(car(arg)))))
+                {
+                  set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pi_function(global_value(car(arg)))));
+                  if (integer(opt3_con(arg)) == 1)
+                    {
+                      if (opt3_direct(cdr(arg)) == (s7_pointer)g_sub_xi)
+                        return(fx_sub_a1);
+                      if (opt3_direct(cdr(arg)) == (s7_pointer)add_p_pi)
+                        return(fx_add_a1);
+                    }
+                  return(fx_c_ai_direct);
+                }
+              return(fx_c_ac_direct);
+            }
+          return(fx_c_ac);
+
+        case HOP_SAFE_C_CA:
+          return((fn_proc(arg) == g_cons) ? fx_cons_ca : fx_c_ca);
+
+        case HOP_SAFE_C_SA:
+          if (fn_proc(arg) == g_multiply_2) return(fx_multiply_sa);
+          if (fn_proc(arg) == g_add_2) return(fx_add_sa);
+          if (is_global_and_has_func(car(arg), s7_p_pp_function))
+            {
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              return((fn_proc(arg) == g_cons) ? fx_cons_sa : fx_c_sa_direct);
+            }
+          return(fx_c_sa);
+
+        case HOP_SAFE_C_AS:
+          if (fn_proc(arg) == g_add_2) return(fx_add_as);
+          if (is_global_and_has_func(car(arg), s7_p_pp_function))
+            {
+              set_opt3_direct(cdr(arg), (s7_pointer)(s7_p_pp_function(global_value(car(arg)))));
+              return((fn_proc(arg) == g_cons) ? fx_cons_as : fx_c_as_direct);
+            }
+          return(fx_c_as);
+
+        case HOP_SAFE_C_AA:  /* (* wr (float-vector-ref rl 0 j)) (* wr (block-ref (vector-ref rl j) 0)) (- (float-vector-ref rl 0 i) tempr)  */
+          if (fn_proc(arg) == g_add_2)            return(fx_add_aa);
+          if (fn_proc(arg) == g_subtract_2)       return(fx_subtract_aa);
+          if (fn_proc(arg) == g_multiply_2)       return(fx_multiply_aa);
+          if (fn_proc(arg) == g_number_to_string) return(fx_number_to_string_aa);
+          if (fn_proc(arg) == g_cons)             return(fx_cons_aa);
+          return(fx_c_aa);
+
+        case HOP_SAFE_C_opAAq:
+          return((fx_proc(cdadr(arg)) == fx_s) ? fx_c_opsaq : fx_c_opaaq);
+
+        case HOP_SAFE_C_NA:
+          return((fn_proc(arg) == g_vector) ? fx_vector_na : fx_c_na);
+
+        case HOP_SAFE_C_ALL_CA:
+          return((fn_proc(arg) == g_simple_inlet) ? fx_inlet_ca : fx_c_all_ca);
+
+        case HOP_SAFE_CLOSURE_S_A:
+          {
+            s7_pointer body = car(closure_body(opt1_lambda(arg)));
+            if (is_pair(body))
+              {
+                if (optimize_op(body) == OP_AND_2A)
+                  {
+                    if ((fx_matches(caadr(body), sc->is_pair_symbol)) &&
+                        (cadadr(body) == car(closure_args(opt1_lambda(arg)))))
+                      return(fx_safe_closure_s_and_pair);       /* lint arg: (len>1? init), args: (x) body: (and (pair? x) (pair? (cdr x))) */
+                    return(fx_safe_closure_s_and_2a);
+                  }
+                if (optimize_op(body) == HOP_SAFE_C_opSq_C)
+                  {
+                    if ((fn_proc(body) == g_simple_let_ref) &&
+                        (cadadr(body) == car(closure_args(opt1_lambda(arg)))))
+                      {
+                        set_opt2_sym(cdr(arg), cadaddr(body));
+                        return(fx_simple_let_ref_s); /* (var-ref local-var) -> (let-ref (cdr v=local_var) 'ref) */
+                      }}}
+            return((fx_proc(closure_body(opt1_lambda(arg))) == fx_sqr_t) ? fx_safe_closure_s_sqr : fx_safe_closure_s_a);
+          }
+
+        case HOP_SAFE_CLOSURE_S_TO_SC:
+          {
+            s7_pointer body = car(closure_body(opt1_lambda(arg)));
+            if (fn_proc(body) == g_vector_ref_2) return(fx_safe_closure_s_to_vref);
+            if ((is_t_integer(caddr(body))) && (integer(caddr(body)) == 1))
+              {
+                if (car(body) == sc->subtract_symbol) return(fx_safe_closure_s_to_sub1);
+                if (car(body) == sc->add_symbol) return(fx_safe_closure_s_to_add1);
+              }
+            return(fx_safe_closure_s_to_sc);
+          }
+
+        case HOP_SAFE_CLOSURE_A_TO_SC:
+          return((fn_proc(car(closure_body(opt1_lambda(arg)))) == g_vector_ref_2) ? fx_safe_closure_a_to_vref : fx_safe_closure_a_to_sc);
+
+        case HOP_SAFE_CLOSURE_A_A:
+          if (fx_proc(closure_body(opt1_lambda(arg))) == fx_and_2a)
+            return(fx_safe_closure_a_and_2a);
+          return((fx_proc(closure_body(opt1_lambda(arg))) == fx_sqr_t) ? fx_safe_closure_a_sqr : fx_safe_closure_a_a);
+
+        case HOP_SAFE_CLOSURE_3S_A:
+          if (fx_proc(closure_body(opt1_lambda(arg))) == fx_vref_vref_tu_v) return(fx_vref_vref_3_no_let);
+          return(fx_function[optimize_op(arg)]);
+
+        case OP_IMPLICIT_S7_STARLET_REF_S:
+          if (opt3_int(arg) == SL_PRINT_LENGTH) return(fx_implicit_s7_starlet_print_length);
+          if (opt3_int(arg) == SL_SAFETY) return(fx_implicit_s7_starlet_safety);
+          return(fx_implicit_s7_starlet_ref_s);
+
+        case HOP_C:
+          if ((is_unchanged_global(car(arg))) && (car(arg) == sc->curlet_symbol)) return(fx_curlet);
+          /* fall through */
+
+        default:
+          /* if ((S7_DEBUGGING) && (!fx_function[optimize_op(arg)]) && (is_h_optimized(arg))) fprintf(stderr, "fx_choose %s %s\n", op_names[optimize_op(arg)], display(arg)); */
+          /* this includes unsafe c funcs (hop_c_a) and p-arg safe funcs (hop_safe_c_p) -- name needs "safe" and no "p" */
+          return(fx_function[optimize_op(arg)]);
+        }} /* is_optimized */
 
   if (is_safe_quote(car(arg)))
     {
@@ -57966,69 +57966,69 @@ static bool fx_tree_out(s7_scheme *sc, s7_pointer tree, const s7_pointer var1, c
   if (is_symbol(p))
     {
       if ((fx_proc(tree) == fx_s) || (fx_proc(tree) == fx_o))
-	{
-	  if (p == var1) return(with_fx(tree, fx_T));
-	  if (p == var2) return(with_fx(tree, fx_U));
-	  if (p == var3) return(with_fx(tree, fx_V));
-	}
+        {
+          if (p == var1) return(with_fx(tree, fx_T));
+          if (p == var2) return(with_fx(tree, fx_U));
+          if (p == var3) return(with_fx(tree, fx_V));
+        }
       return(false);
     }
   if ((is_pair(p)) && (is_pair(cdr(p))))
     {
       if (cadr(p) == var1)
-	{
-	  if ((fx_proc(tree) == fx_c_s) || (fx_proc(tree) == fx_c_o)) return(with_fx(tree, fx_c_T)); /* fx_c_T_direct got no hits */
-	  if ((fx_proc(tree) == fx_car_s) || (fx_proc(tree) == fx_car_o)) return(with_fx(tree, fx_car_T));
-	  if ((fx_proc(tree) == fx_cdr_s) || (fx_proc(tree) == fx_cdr_o)) return(with_fx(tree, fx_cdr_T));
-	  if (fx_proc(tree) == fx_is_null_s)   return(with_fx(tree, fx_is_null_T));
-	  if (fx_proc(tree) == fx_iterate_o)   return(with_fx(tree, fx_iterate_T));
-	  if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_T1));
-	  if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_T1));
-	  if (fx_proc(tree) == fx_c_sca)       return(with_fx(tree, fx_c_Tca));
-	  if ((fx_proc(tree) == fx_num_eq_si) || (fx_proc(tree) == fx_num_eq_s0) || (fx_proc(tree) == fx_num_eq_oi)) return(with_fx(tree, fx_num_eq_Ti));
-	  /* if (fx_proc(tree) == fx_cons_ss)     return(with_fx(tree, fx_cons_Ts)); */ /* can be fooled -- there is no fx_cons_us etc -- need fx_cons_os */
-	  /* if (fx_proc(tree) == fx_multiply_ss) return(with_fx(tree, fx_multiply_Ts)); */ /* this also can be fooled? */
-	  if ((fx_proc(tree) == fx_c_scs_direct) && (cadddr(p) == var2)) return(with_fx(tree, fx_c_TcU_direct));
-	  if ((fx_proc(tree) == fx_hash_table_ref_ss) && (var3 == caddr(p))) return(with_fx(tree, fx_hash_table_ref_TV));
-	  if ((fx_proc(tree) == fx_geq_ss) && (var2 == caddr(p))) return(with_fx(tree, fx_geq_TU));
-	}
+        {
+          if ((fx_proc(tree) == fx_c_s) || (fx_proc(tree) == fx_c_o)) return(with_fx(tree, fx_c_T)); /* fx_c_T_direct got no hits */
+          if ((fx_proc(tree) == fx_car_s) || (fx_proc(tree) == fx_car_o)) return(with_fx(tree, fx_car_T));
+          if ((fx_proc(tree) == fx_cdr_s) || (fx_proc(tree) == fx_cdr_o)) return(with_fx(tree, fx_cdr_T));
+          if (fx_proc(tree) == fx_is_null_s)   return(with_fx(tree, fx_is_null_T));
+          if (fx_proc(tree) == fx_iterate_o)   return(with_fx(tree, fx_iterate_T));
+          if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_T1));
+          if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_T1));
+          if (fx_proc(tree) == fx_c_sca)       return(with_fx(tree, fx_c_Tca));
+          if ((fx_proc(tree) == fx_num_eq_si) || (fx_proc(tree) == fx_num_eq_s0) || (fx_proc(tree) == fx_num_eq_oi)) return(with_fx(tree, fx_num_eq_Ti));
+          /* if (fx_proc(tree) == fx_cons_ss)     return(with_fx(tree, fx_cons_Ts)); */ /* can be fooled -- there is no fx_cons_us etc -- need fx_cons_os */
+          /* if (fx_proc(tree) == fx_multiply_ss) return(with_fx(tree, fx_multiply_Ts)); */ /* this also can be fooled? */
+          if ((fx_proc(tree) == fx_c_scs_direct) && (cadddr(p) == var2)) return(with_fx(tree, fx_c_TcU_direct));
+          if ((fx_proc(tree) == fx_hash_table_ref_ss) && (var3 == caddr(p))) return(with_fx(tree, fx_hash_table_ref_TV));
+          if ((fx_proc(tree) == fx_geq_ss) && (var2 == caddr(p))) return(with_fx(tree, fx_geq_TU));
+        }
       else
-	if (cadr(p) == var2)
-	  {
-	    if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_U1));
-	    if (fx_proc(tree) == fx_add_s1) return(with_fx(tree, fx_add_U1));
-	    if ((fx_proc(tree) == fx_car_s) || (fx_proc(tree) == fx_car_o)) return(with_fx(tree, fx_car_U));
-	    if ((fx_proc(tree) == fx_cdr_s) || (fx_proc(tree) == fx_cdr_o)) return(with_fx(tree, fx_cdr_U));
-	  }
-	else
-	  if (cadr(p) == var3)
-	    {
-	      if ((fx_proc(tree) == fx_c_s) || (fx_proc(tree) == fx_c_o)) return(with_fx(tree, fx_c_V));
-	      if (fx_proc(tree) == fx_add_s1) return(with_fx(tree, fx_add_V1));
-	    }
-	  else
-	    if (is_pair(cddr(p)))
-	      {
-		if (caddr(p) == var1)
-		  {
-		    if ((fx_proc(tree) == fx_num_eq_ts) || (fx_proc(tree) == fx_num_eq_to)) return(with_fx(tree, fx_num_eq_tT));
-		    if ((fx_proc(tree) == fx_gt_ts) || (fx_proc(tree) == fx_gt_to)) return(with_fx(tree, fx_gt_tT));
-		    if (fx_proc(tree) == fx_lt_ts) return(with_fx(tree, fx_lt_tT));
-		    if ((fx_proc(tree) == fx_geq_ts) || (fx_proc(tree) == fx_geq_to)) return(with_fx(tree, fx_geq_tT));
-		  }
-		else
-		  if (caddr(p) == var2)
-		    {
-		      if (fx_proc(tree) == fx_c_ts)        return(with_fx(tree, fx_c_tU));
-		      if (fx_proc(tree) == fx_cons_ts)     return(with_fx(tree, fx_cons_tU));
-		      if (fx_proc(tree) == fx_c_ts_direct) return(with_fx(tree, fx_c_tU_direct));
-		      if (fx_proc(tree) == fx_lt_ts)       return(with_fx(tree, fx_lt_tU));
-		      if (fx_proc(tree) == fx_num_eq_us)   return(with_fx(tree, fx_num_eq_uU));
-		      if (fx_proc(tree) == fx_num_eq_vs)   return(with_fx(tree, fx_num_eq_vU));
-		    }
-		  else
-		    if ((fx_proc(tree) == fx_add_sqr_s) && (cadadr(p) == var1)) return(with_fx(tree, fx_add_sqr_T));
-	      }}
+        if (cadr(p) == var2)
+          {
+            if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_U1));
+            if (fx_proc(tree) == fx_add_s1) return(with_fx(tree, fx_add_U1));
+            if ((fx_proc(tree) == fx_car_s) || (fx_proc(tree) == fx_car_o)) return(with_fx(tree, fx_car_U));
+            if ((fx_proc(tree) == fx_cdr_s) || (fx_proc(tree) == fx_cdr_o)) return(with_fx(tree, fx_cdr_U));
+          }
+        else
+          if (cadr(p) == var3)
+            {
+              if ((fx_proc(tree) == fx_c_s) || (fx_proc(tree) == fx_c_o)) return(with_fx(tree, fx_c_V));
+              if (fx_proc(tree) == fx_add_s1) return(with_fx(tree, fx_add_V1));
+            }
+          else
+            if (is_pair(cddr(p)))
+              {
+                if (caddr(p) == var1)
+                  {
+                    if ((fx_proc(tree) == fx_num_eq_ts) || (fx_proc(tree) == fx_num_eq_to)) return(with_fx(tree, fx_num_eq_tT));
+                    if ((fx_proc(tree) == fx_gt_ts) || (fx_proc(tree) == fx_gt_to)) return(with_fx(tree, fx_gt_tT));
+                    if (fx_proc(tree) == fx_lt_ts) return(with_fx(tree, fx_lt_tT));
+                    if ((fx_proc(tree) == fx_geq_ts) || (fx_proc(tree) == fx_geq_to)) return(with_fx(tree, fx_geq_tT));
+                  }
+                else
+                  if (caddr(p) == var2)
+                    {
+                      if (fx_proc(tree) == fx_c_ts)        return(with_fx(tree, fx_c_tU));
+                      if (fx_proc(tree) == fx_cons_ts)     return(with_fx(tree, fx_cons_tU));
+                      if (fx_proc(tree) == fx_c_ts_direct) return(with_fx(tree, fx_c_tU_direct));
+                      if (fx_proc(tree) == fx_lt_ts)       return(with_fx(tree, fx_lt_tU));
+                      if (fx_proc(tree) == fx_num_eq_us)   return(with_fx(tree, fx_num_eq_uU));
+                      if (fx_proc(tree) == fx_num_eq_vs)   return(with_fx(tree, fx_num_eq_vU));
+                    }
+                  else
+                    if ((fx_proc(tree) == fx_add_sqr_s) && (cadadr(p) == var1)) return(with_fx(tree, fx_add_sqr_T));
+              }}
   return(false);
 }
 
@@ -58050,13 +58050,13 @@ static bool fx_tree_in(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_point
   if (is_symbol(p))
     {
       if (fx_proc(tree) == fx_s)
-	{
-	  if (p == var1) return(with_fx(tree, fx_t));
-	  if (p == var2) return(with_fx(tree, fx_u));
-	  if (p == var3) return(with_fx(tree, fx_v));
-	  if (is_global(p)) return(with_fx(tree, fx_g));
-	  if (!more_vars) return(with_fx(tree, fx_o));
-	}
+        {
+          if (p == var1) return(with_fx(tree, fx_t));
+          if (p == var2) return(with_fx(tree, fx_u));
+          if (p == var3) return(with_fx(tree, fx_v));
+          if (is_global(p)) return(with_fx(tree, fx_g));
+          if (!more_vars) return(with_fx(tree, fx_o));
+        }
       return(false);
     }
   if ((!is_pair(p)) || (is_fx_treed(tree)) || (!has_fx(tree))) return(false);
@@ -58065,267 +58065,267 @@ static bool fx_tree_in(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_point
     {
     case HOP_SAFE_C_S:
       if (cadr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_c_s)         return(with_fx(tree, fx_c_t));
-	  if (fx_proc(tree) == fx_c_s_direct)  return(with_fx(tree, (opt2_direct(cdr(p)) == (s7_pointer)cddr_p_p) ? fx_cddr_t : fx_c_t_direct));
-	  if (fx_proc(tree) == fx_car_s)       return(with_fx(tree, fx_car_t));
-	  if (fx_proc(tree) == fx_cdr_s)       return(with_fx(tree, fx_cdr_t));
-	  if (fx_proc(tree) == fx_cddr_s)      return(with_fx(tree, fx_cddr_t));
-	  if (fx_proc(tree) == fx_cadr_s)      return(with_fx(tree, fx_cadr_t));
-	  if (fx_proc(tree) == fx_not_s)       return(with_fx(tree, fx_not_t));
-	  if (fx_proc(tree) == fx_is_null_s)   return(with_fx(tree, fx_is_null_t));
-	  if (fx_proc(tree) == fx_is_pair_s)   return(with_fx(tree, fx_is_pair_t));
-	  if (fx_proc(tree) == fx_is_symbol_s) return(with_fx(tree, fx_is_symbol_t));
-	  if (fx_proc(tree) == fx_is_eof_s)    return(with_fx(tree, fx_is_eof_t));
-	  if (fx_proc(tree) == fx_is_string_s) return(with_fx(tree, fx_is_string_t));
-	  if (fx_proc(tree) == fx_is_vector_s) return(with_fx(tree, fx_is_vector_t));
-	  if (fx_proc(tree) == fx_is_integer_s) return(with_fx(tree, fx_is_integer_t));
-	  if (fx_proc(tree) == fx_is_procedure_s) return(with_fx(tree, fx_is_procedure_t));
-	  if (fx_proc(tree) == fx_is_type_s)   return(with_fx(tree, fx_is_type_t));
-	  if (fx_proc(tree) == fx_length_s)    return(with_fx(tree, fx_length_t));
-	  if (fx_proc(tree) == fx_real_part_s) return(with_fx(tree, fx_real_part_t));
-	  if (fx_proc(tree) == fx_imag_part_s) return(with_fx(tree, fx_imag_part_t));
-	  return(false);
-	}
+        {
+          if (fx_proc(tree) == fx_c_s)         return(with_fx(tree, fx_c_t));
+          if (fx_proc(tree) == fx_c_s_direct)  return(with_fx(tree, (opt2_direct(cdr(p)) == (s7_pointer)cddr_p_p) ? fx_cddr_t : fx_c_t_direct));
+          if (fx_proc(tree) == fx_car_s)       return(with_fx(tree, fx_car_t));
+          if (fx_proc(tree) == fx_cdr_s)       return(with_fx(tree, fx_cdr_t));
+          if (fx_proc(tree) == fx_cddr_s)      return(with_fx(tree, fx_cddr_t));
+          if (fx_proc(tree) == fx_cadr_s)      return(with_fx(tree, fx_cadr_t));
+          if (fx_proc(tree) == fx_not_s)       return(with_fx(tree, fx_not_t));
+          if (fx_proc(tree) == fx_is_null_s)   return(with_fx(tree, fx_is_null_t));
+          if (fx_proc(tree) == fx_is_pair_s)   return(with_fx(tree, fx_is_pair_t));
+          if (fx_proc(tree) == fx_is_symbol_s) return(with_fx(tree, fx_is_symbol_t));
+          if (fx_proc(tree) == fx_is_eof_s)    return(with_fx(tree, fx_is_eof_t));
+          if (fx_proc(tree) == fx_is_string_s) return(with_fx(tree, fx_is_string_t));
+          if (fx_proc(tree) == fx_is_vector_s) return(with_fx(tree, fx_is_vector_t));
+          if (fx_proc(tree) == fx_is_integer_s) return(with_fx(tree, fx_is_integer_t));
+          if (fx_proc(tree) == fx_is_procedure_s) return(with_fx(tree, fx_is_procedure_t));
+          if (fx_proc(tree) == fx_is_type_s)   return(with_fx(tree, fx_is_type_t));
+          if (fx_proc(tree) == fx_length_s)    return(with_fx(tree, fx_length_t));
+          if (fx_proc(tree) == fx_real_part_s) return(with_fx(tree, fx_real_part_t));
+          if (fx_proc(tree) == fx_imag_part_s) return(with_fx(tree, fx_imag_part_t));
+          return(false);
+        }
       if (cadr(p) == var2)
-	{
-	  if (fx_proc(tree) == fx_c_s)
-	    {
-	      if (is_global_and_has_func(car(p), s7_p_p_function))
-		{
-		  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(car(p)))));
-		  return(with_fx(tree, (car(p) == sc->cddr_symbol) ? fx_cddr_u :
-				     ((car(p) == sc->is_positive_symbol) ? fx_is_positive_u :
-				      ((car(p) == sc->is_zero_symbol) ? fx_is_zero_u : fx_c_u_direct))));
-		}
-	      return(with_fx(tree, fx_c_u));
-	    }
-	  if (fx_proc(tree) == fx_c_s_direct)
-	    return(with_fx(tree, (car(p) == sc->cddr_symbol) ? fx_cddr_u :
-			       ((car(p) == sc->is_positive_symbol) ? fx_is_positive_u :
-				((car(p) == sc->is_zero_symbol) ? fx_is_zero_u : fx_c_u_direct))));
-
-	  if (fx_proc(tree) == fx_cdr_s)       return(with_fx(tree, fx_cdr_u));
-	  if (fx_proc(tree) == fx_cadr_s)      return(with_fx(tree, fx_cadr_u));
-	  if (fx_proc(tree) == fx_cddr_s)      return(with_fx(tree, fx_cddr_u));
-	  if (fx_proc(tree) == fx_car_s)       return(with_fx(tree, fx_car_u));
-	  if (fx_proc(tree) == fx_is_null_s)   return(with_fx(tree, fx_is_null_u));
-	  if (fx_proc(tree) == fx_is_type_s)   return(with_fx(tree, fx_is_type_u));
-	  if (fx_proc(tree) == fx_is_pair_s)   return(with_fx(tree, fx_is_pair_u));
-	  if (fx_proc(tree) == fx_is_symbol_s) return(with_fx(tree, fx_is_symbol_u));
-	  if (fx_proc(tree) == fx_is_eof_s)    return(with_fx(tree, fx_is_eof_u));
-	  return(false);
-	}
+        {
+          if (fx_proc(tree) == fx_c_s)
+            {
+              if (is_global_and_has_func(car(p), s7_p_p_function))
+                {
+                  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(car(p)))));
+                  return(with_fx(tree, (car(p) == sc->cddr_symbol) ? fx_cddr_u :
+                                     ((car(p) == sc->is_positive_symbol) ? fx_is_positive_u :
+                                      ((car(p) == sc->is_zero_symbol) ? fx_is_zero_u : fx_c_u_direct))));
+                }
+              return(with_fx(tree, fx_c_u));
+            }
+          if (fx_proc(tree) == fx_c_s_direct)
+            return(with_fx(tree, (car(p) == sc->cddr_symbol) ? fx_cddr_u :
+                               ((car(p) == sc->is_positive_symbol) ? fx_is_positive_u :
+                                ((car(p) == sc->is_zero_symbol) ? fx_is_zero_u : fx_c_u_direct))));
+
+          if (fx_proc(tree) == fx_cdr_s)       return(with_fx(tree, fx_cdr_u));
+          if (fx_proc(tree) == fx_cadr_s)      return(with_fx(tree, fx_cadr_u));
+          if (fx_proc(tree) == fx_cddr_s)      return(with_fx(tree, fx_cddr_u));
+          if (fx_proc(tree) == fx_car_s)       return(with_fx(tree, fx_car_u));
+          if (fx_proc(tree) == fx_is_null_s)   return(with_fx(tree, fx_is_null_u));
+          if (fx_proc(tree) == fx_is_type_s)   return(with_fx(tree, fx_is_type_u));
+          if (fx_proc(tree) == fx_is_pair_s)   return(with_fx(tree, fx_is_pair_u));
+          if (fx_proc(tree) == fx_is_symbol_s) return(with_fx(tree, fx_is_symbol_u));
+          if (fx_proc(tree) == fx_is_eof_s)    return(with_fx(tree, fx_is_eof_u));
+          return(false);
+        }
       if (cadr(p) == var3)
-	{
-	  if (fx_proc(tree) == fx_cdr_s)      return(with_fx(tree, fx_cdr_v));
-	  if (fx_proc(tree) == fx_is_null_s)  return(with_fx(tree, fx_is_null_v));
-	  if (fx_proc(tree) == fx_is_pair_s)  return(with_fx(tree, fx_is_pair_v));
-	  if (fx_proc(tree) == fx_c_s)        return(with_fx(tree, fx_c_v));
-	  if (fx_proc(tree) == fx_c_s_direct) return(with_fx(tree, fx_c_v_direct));
-	  return(false);
-	}
+        {
+          if (fx_proc(tree) == fx_cdr_s)      return(with_fx(tree, fx_cdr_v));
+          if (fx_proc(tree) == fx_is_null_s)  return(with_fx(tree, fx_is_null_v));
+          if (fx_proc(tree) == fx_is_pair_s)  return(with_fx(tree, fx_is_pair_v));
+          if (fx_proc(tree) == fx_c_s)        return(with_fx(tree, fx_c_v));
+          if (fx_proc(tree) == fx_c_s_direct) return(with_fx(tree, fx_c_v_direct));
+          return(false);
+        }
       if (!more_vars)
-	{
-	  if (fx_proc(tree) == fx_is_null_s)  return(with_fx(tree, fx_is_null_o));
-	  if (fx_proc(tree) == fx_car_s)      return(with_fx(tree, fx_car_o));
-	  if (fx_proc(tree) == fx_cdr_s)      return(with_fx(tree, fx_cdr_o));
-	  if (fx_proc(tree) == fx_cadr_s)     return(with_fx(tree, fx_cadr_o));
-	  if (fx_proc(tree) == fx_cddr_s)     return(with_fx(tree, fx_cddr_o));
-	  if (fx_proc(tree) == fx_iterate_s)  return(with_fx(tree, fx_iterate_o));
-	  if (fx_proc(tree) == fx_not_s)      return(with_fx(tree, fx_not_o));
-	  if (fx_proc(tree) == fx_c_s_direct) return(with_fx(tree, fx_c_o_direct));
-	  if (fx_proc(tree) == fx_c_s)        return(with_fx(tree, fx_c_o));
-	}
+        {
+          if (fx_proc(tree) == fx_is_null_s)  return(with_fx(tree, fx_is_null_o));
+          if (fx_proc(tree) == fx_car_s)      return(with_fx(tree, fx_car_o));
+          if (fx_proc(tree) == fx_cdr_s)      return(with_fx(tree, fx_cdr_o));
+          if (fx_proc(tree) == fx_cadr_s)     return(with_fx(tree, fx_cadr_o));
+          if (fx_proc(tree) == fx_cddr_s)     return(with_fx(tree, fx_cddr_o));
+          if (fx_proc(tree) == fx_iterate_s)  return(with_fx(tree, fx_iterate_o));
+          if (fx_proc(tree) == fx_not_s)      return(with_fx(tree, fx_not_o));
+          if (fx_proc(tree) == fx_c_s_direct) return(with_fx(tree, fx_c_o_direct));
+          if (fx_proc(tree) == fx_c_s)        return(with_fx(tree, fx_c_o));
+        }
       break;
 
     case HOP_SAFE_C_SC:
       if (cadr(p) == var1)
-	{
-	  if ((fx_proc(tree) == fx_char_eq_sc) || (fn_proc(p) == g_char_equal_2)) return(with_fx(tree, fx_char_eq_tc));
-	  if (fx_proc(tree) == fx_c_sc)   return(with_fx(tree, fx_c_tc));
-	  if (fx_proc(tree) == fx_add_sf) return(with_fx(tree, fx_add_tf));
-	  if (fn_proc(p) == g_less_xf)    return(with_fx(tree, fx_lt_tf));
-	  if (fn_proc(p) == g_less_x0)    return(with_fx(tree, fx_lt_t0));
-	  if (fn_proc(p) == g_less_xi)
-	    return(with_fx(tree, (integer(caddr(p)) == 2) ? fx_lt_t2 : ((integer(caddr(p)) == 1) ? fx_lt_t1 : fx_lt_ti)));
-	  if (fn_proc(p) == g_geq_xf)     return(with_fx(tree, fx_geq_tf));
-	  if (fn_proc(p) == g_geq_xi)     return(with_fx(tree, (integer(caddr(p)) == 0) ? fx_geq_t0 : fx_geq_ti));
-	  if (fn_proc(p) == g_leq_xi)     return(with_fx(tree, fx_leq_ti));
-	  if (fn_proc(p) == g_greater_xi) return(with_fx(tree, fx_gt_ti));
-	  if (fx_proc(tree) == fx_leq_si) return(with_fx(tree, fx_leq_ti));
-	  if (fx_proc(tree) == fx_gt_si)  return(with_fx(tree, fx_gt_ti));
-
-	  if (fx_proc(tree) == fx_c_sc_direct) /* p_pp cases */
-	    {
-	      if ((opt3_direct(cdr(p)) == (s7_pointer)vector_ref_p_pp) && (is_t_integer(caddr(p))))
-		return(with_fx(tree, fx_vector_ref_tc));
-	      if ((opt3_direct(cdr(p)) == (s7_pointer)string_ref_p_pp) && (is_t_integer(caddr(p))) && (integer(caddr(p)) == 0))
-		set_opt3_direct(cdr(p), string_ref_p_p0);
-	      return(with_fx(tree, fx_c_tc_direct));
-	    }
-	  if (fx_proc(tree) == fx_c_si_direct) /* p_pi cases */
-	    {
-	      if (opt3_direct(cdr(p)) == (s7_pointer)vector_ref_p_pi)
-		return(with_fx(tree, fx_vector_ref_tc));
-	      if ((opt3_direct(cdr(p)) == (s7_pointer)string_ref_p_pi) && (integer(caddr(p)) == 0))
-		set_opt3_direct(cdr(p), string_ref_p_p0);
-	      return(with_fx(tree, (opt3_direct(cdr(p)) == (s7_pointer)remainder_p_pi) ? fx_c_ti_remainder : fx_c_ti_direct));
-	    }
-
-	  if (fx_proc(tree) == fx_is_eq_sc)    return(with_fx(tree, fx_is_eq_tc));
-	  if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_t1));
-	  if (fx_proc(tree) == fx_add_si)      return(with_fx(tree, fx_add_ti));
-	  if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_t1));
-	  if (fx_proc(tree) == fx_subtract_si) return(with_fx(tree, fx_subtract_ti));
-	  if (fx_proc(tree) == fx_subtract_sf) return(with_fx(tree, fx_subtract_tf));
-	  if (fx_proc(tree) == fx_multiply_sf) return(with_fx(tree, fx_multiply_tf));
-	  if (fx_proc(tree) == fx_multiply_si) return(with_fx(tree, fx_multiply_ti));
-	  if (fx_proc(tree) == fx_lt_si) /* is this ever hit? */
-	    return(with_fx(tree, (integer(caddr(p)) == 2) ? fx_lt_t2 : ((integer(caddr(p)) == 1) ? fx_lt_t1 : fx_lt_ti)));
-	  if (fx_proc(tree) == fx_num_eq_si)   return(with_fx(tree, fx_num_eq_ti));
-	  if (fx_proc(tree) == fx_num_eq_s0)   return(with_fx(tree, fx_num_eq_t0));
-	  if (fx_proc(tree) == fx_memq_sc)     return(with_fx(tree, fx_memq_tc));
-	  return(false);
-	}
+        {
+          if ((fx_proc(tree) == fx_char_eq_sc) || (fn_proc(p) == g_char_equal_2)) return(with_fx(tree, fx_char_eq_tc));
+          if (fx_proc(tree) == fx_c_sc)   return(with_fx(tree, fx_c_tc));
+          if (fx_proc(tree) == fx_add_sf) return(with_fx(tree, fx_add_tf));
+          if (fn_proc(p) == g_less_xf)    return(with_fx(tree, fx_lt_tf));
+          if (fn_proc(p) == g_less_x0)    return(with_fx(tree, fx_lt_t0));
+          if (fn_proc(p) == g_less_xi)
+            return(with_fx(tree, (integer(caddr(p)) == 2) ? fx_lt_t2 : ((integer(caddr(p)) == 1) ? fx_lt_t1 : fx_lt_ti)));
+          if (fn_proc(p) == g_geq_xf)     return(with_fx(tree, fx_geq_tf));
+          if (fn_proc(p) == g_geq_xi)     return(with_fx(tree, (integer(caddr(p)) == 0) ? fx_geq_t0 : fx_geq_ti));
+          if (fn_proc(p) == g_leq_xi)     return(with_fx(tree, fx_leq_ti));
+          if (fn_proc(p) == g_greater_xi) return(with_fx(tree, fx_gt_ti));
+          if (fx_proc(tree) == fx_leq_si) return(with_fx(tree, fx_leq_ti));
+          if (fx_proc(tree) == fx_gt_si)  return(with_fx(tree, fx_gt_ti));
+
+          if (fx_proc(tree) == fx_c_sc_direct) /* p_pp cases */
+            {
+              if ((opt3_direct(cdr(p)) == (s7_pointer)vector_ref_p_pp) && (is_t_integer(caddr(p))))
+                return(with_fx(tree, fx_vector_ref_tc));
+              if ((opt3_direct(cdr(p)) == (s7_pointer)string_ref_p_pp) && (is_t_integer(caddr(p))) && (integer(caddr(p)) == 0))
+                set_opt3_direct(cdr(p), string_ref_p_p0);
+              return(with_fx(tree, fx_c_tc_direct));
+            }
+          if (fx_proc(tree) == fx_c_si_direct) /* p_pi cases */
+            {
+              if (opt3_direct(cdr(p)) == (s7_pointer)vector_ref_p_pi)
+                return(with_fx(tree, fx_vector_ref_tc));
+              if ((opt3_direct(cdr(p)) == (s7_pointer)string_ref_p_pi) && (integer(caddr(p)) == 0))
+                set_opt3_direct(cdr(p), string_ref_p_p0);
+              return(with_fx(tree, (opt3_direct(cdr(p)) == (s7_pointer)remainder_p_pi) ? fx_c_ti_remainder : fx_c_ti_direct));
+            }
+
+          if (fx_proc(tree) == fx_is_eq_sc)    return(with_fx(tree, fx_is_eq_tc));
+          if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_t1));
+          if (fx_proc(tree) == fx_add_si)      return(with_fx(tree, fx_add_ti));
+          if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_t1));
+          if (fx_proc(tree) == fx_subtract_si) return(with_fx(tree, fx_subtract_ti));
+          if (fx_proc(tree) == fx_subtract_sf) return(with_fx(tree, fx_subtract_tf));
+          if (fx_proc(tree) == fx_multiply_sf) return(with_fx(tree, fx_multiply_tf));
+          if (fx_proc(tree) == fx_multiply_si) return(with_fx(tree, fx_multiply_ti));
+          if (fx_proc(tree) == fx_lt_si) /* is this ever hit? */
+            return(with_fx(tree, (integer(caddr(p)) == 2) ? fx_lt_t2 : ((integer(caddr(p)) == 1) ? fx_lt_t1 : fx_lt_ti)));
+          if (fx_proc(tree) == fx_num_eq_si)   return(with_fx(tree, fx_num_eq_ti));
+          if (fx_proc(tree) == fx_num_eq_s0)   return(with_fx(tree, fx_num_eq_t0));
+          if (fx_proc(tree) == fx_memq_sc)     return(with_fx(tree, fx_memq_tc));
+          return(false);
+        }
       if (cadr(p) == var2)
-	{
-	  if (fx_proc(tree) == fx_c_sc)        return(with_fx(tree, fx_c_uc));
-	  if (fx_proc(tree) == fx_num_eq_s0)   return(with_fx(tree, fx_num_eq_u0));
-	  if (fx_proc(tree) == fx_num_eq_si)   return(with_fx(tree, fx_num_eq_ui));
-	  if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_u1));
-	  if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_u1));
-	  if (fx_proc(tree) == fx_subtract_si) return(with_fx(tree, fx_subtract_ui));
-	  if (fx_proc(tree) == fx_multiply_si) return(with_fx(tree, fx_multiply_ui));
-	  if (fx_proc(tree) == fx_is_eq_sc)    return(with_fx(tree, fx_is_eq_uc));
-	  if (fx_proc(tree) == fx_leq_si)      return(with_fx(tree, fx_leq_ui));
-	  if (fx_proc(tree) == fx_gt_si)       return(with_fx(tree, fx_gt_ui));
-	  return(false);
-	}
+        {
+          if (fx_proc(tree) == fx_c_sc)        return(with_fx(tree, fx_c_uc));
+          if (fx_proc(tree) == fx_num_eq_s0)   return(with_fx(tree, fx_num_eq_u0));
+          if (fx_proc(tree) == fx_num_eq_si)   return(with_fx(tree, fx_num_eq_ui));
+          if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_u1));
+          if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_u1));
+          if (fx_proc(tree) == fx_subtract_si) return(with_fx(tree, fx_subtract_ui));
+          if (fx_proc(tree) == fx_multiply_si) return(with_fx(tree, fx_multiply_ui));
+          if (fx_proc(tree) == fx_is_eq_sc)    return(with_fx(tree, fx_is_eq_uc));
+          if (fx_proc(tree) == fx_leq_si)      return(with_fx(tree, fx_leq_ui));
+          if (fx_proc(tree) == fx_gt_si)       return(with_fx(tree, fx_gt_ui));
+          return(false);
+        }
       if (cadr(p) == var3)
-	{
-	  if (fx_proc(tree) == fx_num_eq_s0)   return(with_fx(tree, fx_num_eq_v0));
-	  if (fx_proc(tree) == fx_num_eq_si)   return(with_fx(tree, fx_num_eq_vi));
-	  if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_v1));
-	  if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_v1));
-	  if (fx_proc(tree) == fx_leq_si)      return(with_fx(tree, fx_leq_vi));
-	  if (fx_proc(tree) == fx_c_sc)        return(with_fx(tree, fx_c_vc));
-	  return(false);
-	}
+        {
+          if (fx_proc(tree) == fx_num_eq_s0)   return(with_fx(tree, fx_num_eq_v0));
+          if (fx_proc(tree) == fx_num_eq_si)   return(with_fx(tree, fx_num_eq_vi));
+          if (fx_proc(tree) == fx_add_s1)      return(with_fx(tree, fx_add_v1));
+          if (fx_proc(tree) == fx_subtract_s1) return(with_fx(tree, fx_subtract_v1));
+          if (fx_proc(tree) == fx_leq_si)      return(with_fx(tree, fx_leq_vi));
+          if (fx_proc(tree) == fx_c_sc)        return(with_fx(tree, fx_c_vc));
+          return(false);
+        }
       if (!more_vars)
-	{
-	  if (fx_proc(tree) == fx_num_eq_si) return(with_fx(tree, fx_num_eq_oi));
-	  if ((fx_proc(tree) == fx_c_sc) && (o_var_ok(cadr(p), var1, var2, var3))) return(with_fx(tree, fx_c_oc));
-	}
+        {
+          if (fx_proc(tree) == fx_num_eq_si) return(with_fx(tree, fx_num_eq_oi));
+          if ((fx_proc(tree) == fx_c_sc) && (o_var_ok(cadr(p), var1, var2, var3))) return(with_fx(tree, fx_c_oc));
+        }
       break;
 
     case HOP_SAFE_C_CS:
       if (caddr(p) == var1)
-	{
-	  if ((car(p) == sc->cons_symbol) && (is_unchanged_global(sc->cons_symbol))) return(with_fx(tree, fx_cons_ct));
-	  if (fx_proc(tree) == fx_multiply_is) return(with_fx(tree, fx_multiply_it));
-	  if (fx_proc(tree) == fx_add_fs) return(with_fx(tree, fx_add_ft));
-	  if (fx_proc(tree) == fx_c_cs)
-	    {
-	      if (is_global_and_has_func(car(p), s7_p_pp_function))
-		{
-		  if (fn_proc(p) == g_tree_set_memq_syms)
-		    set_opt3_direct(cdr(p), (s7_pointer)tree_set_memq_syms_direct);
-		  else set_opt3_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
-		  set_fx_direct(tree, fx_c_ct_direct);
-		}
-	      else set_fx_direct(tree, fx_c_ct);
-	      return(true);
-	    }}
+        {
+          if ((car(p) == sc->cons_symbol) && (is_unchanged_global(sc->cons_symbol))) return(with_fx(tree, fx_cons_ct));
+          if (fx_proc(tree) == fx_multiply_is) return(with_fx(tree, fx_multiply_it));
+          if (fx_proc(tree) == fx_add_fs) return(with_fx(tree, fx_add_ft));
+          if (fx_proc(tree) == fx_c_cs)
+            {
+              if (is_global_and_has_func(car(p), s7_p_pp_function))
+                {
+                  if (fn_proc(p) == g_tree_set_memq_syms)
+                    set_opt3_direct(cdr(p), (s7_pointer)tree_set_memq_syms_direct);
+                  else set_opt3_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
+                  set_fx_direct(tree, fx_c_ct_direct);
+                }
+              else set_fx_direct(tree, fx_c_ct);
+              return(true);
+            }}
       if ((caddr(p) == var2) && (fx_proc(tree) == fx_c_cs)) return(with_fx(tree, fx_c_cu));
       break;
 
     case HOP_SAFE_C_SS:
       if (cadr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_c_ss)        return(with_fx(tree, (caddr(p) == var2) ? fx_c_tu : fx_c_ts));
-	  if (fx_proc(tree) == fx_c_ss_direct) return(with_fx(tree, (caddr(p) == var2) ? fx_c_tu_direct : fx_c_ts_direct));
-	  if (fx_proc(tree) == fx_add_ss)      return(with_fx(tree, (caddr(p) == var2) ? fx_add_tu : fx_add_ts));
-	  if (fx_proc(tree) == fx_subtract_ss) return(with_fx(tree, (caddr(p) == var2) ? fx_subtract_tu : fx_subtract_ts));
-	  if (fx_proc(tree) == fx_cons_ss)     return(with_fx(tree, (caddr(p) == var2) ? fx_cons_tu : fx_cons_ts));
-	  if (caddr(p) == var2)
-	    {
-	      if (fx_proc(tree) == fx_gt_ss)       return(with_fx(tree, fx_gt_tu));
-	      if (fx_proc(tree) == fx_lt_ss)       return(with_fx(tree, fx_lt_tu));
-	      if (fx_proc(tree) == fx_leq_ss)      return(with_fx(tree, fx_leq_tu));
-	      if (fx_proc(tree) == fx_geq_ss)      return(with_fx(tree, fx_geq_tu));
-	      if (fx_proc(tree) == fx_multiply_ss) return(with_fx(tree, fx_multiply_tu));
-	      if (fx_proc(tree) == fx_num_eq_ss)   return(with_fx(tree, fx_num_eq_tu));
-	      if (fx_proc(tree) == fx_memq_ss)     return(with_fx(tree, fx_memq_tu));
-	    }
-	  if (fx_proc(tree) == fx_multiply_ss) return(with_fx(tree, fx_multiply_ts));
-	  if (fx_proc(tree) == fx_num_eq_ss)
-	    {
-	      if (caddr(p) == var3) return(with_fx(tree, fx_num_eq_tv));
-	      if (is_global(caddr(p))) return(with_fx(tree, fx_num_eq_tg));
-	      if ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) return(with_fx(tree, fx_num_eq_to));
-	      return(with_fx(tree, fx_num_eq_ts));
-	    }
-	  if (fx_proc(tree) == fx_geq_ss)
-	    {
-	      if ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) return(with_fx(tree, fx_geq_to));
-	      return(with_fx(tree, fx_geq_ts));
-	    }
-	  if (fx_proc(tree) == fx_leq_ss) return(with_fx(tree, fx_leq_ts));
-	  if (fx_proc(tree) == fx_lt_ss)  return(with_fx(tree, fx_lt_ts));
-	  if (fx_proc(tree) == fx_lt_sg)  return(with_fx(tree, fx_lt_tg));
-	  if (fx_proc(tree) == fx_gt_ss)
-	    {
-	      if (is_global(caddr(p))) return(with_fx(tree, fx_gt_tg));
-	      if ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) return(with_fx(tree, fx_gt_to));
-	      return(with_fx(tree, fx_gt_ts));
-	    }
-	  if (fx_proc(tree) == fx_sqr_s) return(with_fx(tree, fx_sqr_t));
-	  if (fx_proc(tree) == fx_is_eq_ss)
-	    {
-	      if (caddr(p) == var2) return(with_fx(tree, fx_is_eq_tu));
-	      if ((!more_vars) && (caddr(p) != var3) && (caddr(p) != var1)) return(with_fx(tree, fx_is_eq_to));
-	      return(with_fx(tree, fx_is_eq_ts));
-	    }
-	  if (fx_proc(tree) == fx_vref_ss)
-	    {
-	      if (caddr(p) == var2) return(with_fx(tree, fx_vref_tu));
-	      return(with_fx(tree, fx_vref_ts));
-	    }}
+        {
+          if (fx_proc(tree) == fx_c_ss)        return(with_fx(tree, (caddr(p) == var2) ? fx_c_tu : fx_c_ts));
+          if (fx_proc(tree) == fx_c_ss_direct) return(with_fx(tree, (caddr(p) == var2) ? fx_c_tu_direct : fx_c_ts_direct));
+          if (fx_proc(tree) == fx_add_ss)      return(with_fx(tree, (caddr(p) == var2) ? fx_add_tu : fx_add_ts));
+          if (fx_proc(tree) == fx_subtract_ss) return(with_fx(tree, (caddr(p) == var2) ? fx_subtract_tu : fx_subtract_ts));
+          if (fx_proc(tree) == fx_cons_ss)     return(with_fx(tree, (caddr(p) == var2) ? fx_cons_tu : fx_cons_ts));
+          if (caddr(p) == var2)
+            {
+              if (fx_proc(tree) == fx_gt_ss)       return(with_fx(tree, fx_gt_tu));
+              if (fx_proc(tree) == fx_lt_ss)       return(with_fx(tree, fx_lt_tu));
+              if (fx_proc(tree) == fx_leq_ss)      return(with_fx(tree, fx_leq_tu));
+              if (fx_proc(tree) == fx_geq_ss)      return(with_fx(tree, fx_geq_tu));
+              if (fx_proc(tree) == fx_multiply_ss) return(with_fx(tree, fx_multiply_tu));
+              if (fx_proc(tree) == fx_num_eq_ss)   return(with_fx(tree, fx_num_eq_tu));
+              if (fx_proc(tree) == fx_memq_ss)     return(with_fx(tree, fx_memq_tu));
+            }
+          if (fx_proc(tree) == fx_multiply_ss) return(with_fx(tree, fx_multiply_ts));
+          if (fx_proc(tree) == fx_num_eq_ss)
+            {
+              if (caddr(p) == var3) return(with_fx(tree, fx_num_eq_tv));
+              if (is_global(caddr(p))) return(with_fx(tree, fx_num_eq_tg));
+              if ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) return(with_fx(tree, fx_num_eq_to));
+              return(with_fx(tree, fx_num_eq_ts));
+            }
+          if (fx_proc(tree) == fx_geq_ss)
+            {
+              if ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) return(with_fx(tree, fx_geq_to));
+              return(with_fx(tree, fx_geq_ts));
+            }
+          if (fx_proc(tree) == fx_leq_ss) return(with_fx(tree, fx_leq_ts));
+          if (fx_proc(tree) == fx_lt_ss)  return(with_fx(tree, fx_lt_ts));
+          if (fx_proc(tree) == fx_lt_sg)  return(with_fx(tree, fx_lt_tg));
+          if (fx_proc(tree) == fx_gt_ss)
+            {
+              if (is_global(caddr(p))) return(with_fx(tree, fx_gt_tg));
+              if ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) return(with_fx(tree, fx_gt_to));
+              return(with_fx(tree, fx_gt_ts));
+            }
+          if (fx_proc(tree) == fx_sqr_s) return(with_fx(tree, fx_sqr_t));
+          if (fx_proc(tree) == fx_is_eq_ss)
+            {
+              if (caddr(p) == var2) return(with_fx(tree, fx_is_eq_tu));
+              if ((!more_vars) && (caddr(p) != var3) && (caddr(p) != var1)) return(with_fx(tree, fx_is_eq_to));
+              return(with_fx(tree, fx_is_eq_ts));
+            }
+          if (fx_proc(tree) == fx_vref_ss)
+            {
+              if (caddr(p) == var2) return(with_fx(tree, fx_vref_tu));
+              return(with_fx(tree, fx_vref_ts));
+            }}
       if (caddr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_c_ss) return(with_fx(tree, fx_c_st));
-	  if (fx_proc(tree) == fx_c_ss_direct) {return(with_fx(tree, (is_global(cadr(p))) ? fx_c_gt_direct : fx_c_st_direct));}
-	  if (fx_proc(tree) == fx_hash_table_ref_ss) return(with_fx(tree, fx_hash_table_ref_st));
-	  if (fx_proc(tree) == fx_cons_ss) return(with_fx(tree, fx_cons_st));
-	  if (fx_proc(tree) == fx_vref_ss)
-	    {
-	      if (is_global(cadr(p))) return(with_fx(tree, fx_vref_gt));
-	      if ((!more_vars) && (cadr(p) != var2) && (cadr(p) != var3)) return(with_fx(tree, fx_vref_ot));
-	      return(with_fx(tree, fx_vref_st));
-	    }
-	  if ((fx_proc(tree) == fx_gt_ss) && (cadr(p) == var2)) return(with_fx(tree, fx_gt_ut));
-	  if ((fx_proc(tree) == fx_lt_ss) && (cadr(p) == var2)) return(with_fx(tree, fx_lt_ut));
-	  if ((fx_proc(tree) == fx_geq_ss))
-	    {
-	      if ((!more_vars) && (o_var_ok(cadr(p), var1, var2, var3))) return(with_fx(tree, fx_geq_ot));
-	      return(with_fx(tree, fx_geq_st));
-	    }}
+        {
+          if (fx_proc(tree) == fx_c_ss) return(with_fx(tree, fx_c_st));
+          if (fx_proc(tree) == fx_c_ss_direct) {return(with_fx(tree, (is_global(cadr(p))) ? fx_c_gt_direct : fx_c_st_direct));}
+          if (fx_proc(tree) == fx_hash_table_ref_ss) return(with_fx(tree, fx_hash_table_ref_st));
+          if (fx_proc(tree) == fx_cons_ss) return(with_fx(tree, fx_cons_st));
+          if (fx_proc(tree) == fx_vref_ss)
+            {
+              if (is_global(cadr(p))) return(with_fx(tree, fx_vref_gt));
+              if ((!more_vars) && (cadr(p) != var2) && (cadr(p) != var3)) return(with_fx(tree, fx_vref_ot));
+              return(with_fx(tree, fx_vref_st));
+            }
+          if ((fx_proc(tree) == fx_gt_ss) && (cadr(p) == var2)) return(with_fx(tree, fx_gt_ut));
+          if ((fx_proc(tree) == fx_lt_ss) && (cadr(p) == var2)) return(with_fx(tree, fx_lt_ut));
+          if ((fx_proc(tree) == fx_geq_ss))
+            {
+              if ((!more_vars) && (o_var_ok(cadr(p), var1, var2, var3))) return(with_fx(tree, fx_geq_ot));
+              return(with_fx(tree, fx_geq_st));
+            }}
       if (cadr(p) == var2)
-	{
-	  if (fx_proc(tree) == fx_num_eq_ss) return(with_fx(tree, (caddr(p) == var1) ? fx_num_eq_ut : fx_num_eq_us));
-	  if (fx_proc(tree) == fx_geq_ss) return(with_fx(tree, fx_geq_us));
-	  if (fx_proc(tree) == fx_add_ss) return(with_fx(tree, (caddr(p) == var1) ? fx_add_ut : ((caddr(p) == var3) ? fx_add_uv : fx_add_us)));
-	  if (fx_proc(tree) == fx_subtract_ss) return(with_fx(tree, (caddr(p) == var1) ? fx_subtract_ut : fx_subtract_us));
-	  if (caddr(p) == var3) return(with_fx(tree, fx_c_uv));
-	}
+        {
+          if (fx_proc(tree) == fx_num_eq_ss) return(with_fx(tree, (caddr(p) == var1) ? fx_num_eq_ut : fx_num_eq_us));
+          if (fx_proc(tree) == fx_geq_ss) return(with_fx(tree, fx_geq_us));
+          if (fx_proc(tree) == fx_add_ss) return(with_fx(tree, (caddr(p) == var1) ? fx_add_ut : ((caddr(p) == var3) ? fx_add_uv : fx_add_us)));
+          if (fx_proc(tree) == fx_subtract_ss) return(with_fx(tree, (caddr(p) == var1) ? fx_subtract_ut : fx_subtract_us));
+          if (caddr(p) == var3) return(with_fx(tree, fx_c_uv));
+        }
       if ((caddr(p) == var2) && (fx_proc(tree) == fx_sref_ss)) return(with_fx(tree, fx_sref_su));
       if (cadr(p) == var3)
-	{
-	  if (fx_proc(tree) == fx_num_eq_ss) return(with_fx(tree, fx_num_eq_vs));
-	  if ((fx_proc(tree) == fx_add_ss) && (caddr(p) == var2)) return(with_fx(tree, fx_add_vu));
-	  if (fx_proc(tree) == fx_geq_ss) return(with_fx(tree, ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) ? fx_geq_vo : fx_geq_vs));
-	}
+        {
+          if (fx_proc(tree) == fx_num_eq_ss) return(with_fx(tree, fx_num_eq_vs));
+          if ((fx_proc(tree) == fx_add_ss) && (caddr(p) == var2)) return(with_fx(tree, fx_add_vu));
+          if (fx_proc(tree) == fx_geq_ss) return(with_fx(tree, ((!more_vars) && (o_var_ok(caddr(p), var1, var2, var3))) ? fx_geq_vo : fx_geq_vs));
+        }
       break;
 
     case HOP_SAFE_C_AS:
@@ -58334,30 +58334,30 @@ static bool fx_tree_in(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_point
 
     case HOP_SAFE_C_SA:
       if (cadr(p) == var1)
-	{
-	  if ((fx_proc(cddr(p)) == fx_c_opsq_c) &&
-	      (cadadr(caddr(p)) == var1) &&
-	      (is_t_integer(caddaddr(p))) &&
-	      (integer(caddaddr(p)) == 1) &&
-	      (car(p) == sc->string_ref_symbol) &&
-	      (caaddr(p) == sc->subtract_symbol) &&
+        {
+          if ((fx_proc(cddr(p)) == fx_c_opsq_c) &&
+              (cadadr(caddr(p)) == var1) &&
+              (is_t_integer(caddaddr(p))) &&
+              (integer(caddaddr(p)) == 1) &&
+              (car(p) == sc->string_ref_symbol) &&
+              (caaddr(p) == sc->subtract_symbol) &&
 #if (!WITH_PURE_S7)
-	      ((caadr(caddr(p)) == sc->string_length_symbol) || (caadr(caddr(p)) == sc->length_symbol)))
+              ((caadr(caddr(p)) == sc->string_length_symbol) || (caadr(caddr(p)) == sc->length_symbol)))
 #else
-	      (caadr(caddr(p)) == sc->length_symbol))
+              (caadr(caddr(p)) == sc->length_symbol))
 #endif
-	    return(with_fx(tree, fx_sref_t_last));
-	  return(with_fx(tree, fx_c_ta));
-	}
+            return(with_fx(tree, fx_sref_t_last));
+          return(with_fx(tree, fx_c_ta));
+        }
       if (cadr(p) == var2) return(with_fx(tree, (fx_proc(tree) == fx_c_sa_direct) ? fx_c_ua_direct : fx_c_ua));
       break;
 
     case HOP_SAFE_C_SCS:
       if (cadr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_c_scs) return(with_fx(tree, fx_c_tcs));
-	  if (fx_proc(tree) == fx_c_scs_direct) return(with_fx(tree, (cadddr(p) == var2) ? fx_c_tcu_direct : fx_c_tcs_direct));
-	}
+        {
+          if (fx_proc(tree) == fx_c_scs) return(with_fx(tree, fx_c_tcs));
+          if (fx_proc(tree) == fx_c_scs_direct) return(with_fx(tree, (cadddr(p) == var2) ? fx_c_tcu_direct : fx_c_tcs_direct));
+        }
       break;
 
     case HOP_SAFE_C_SSC:
@@ -58370,16 +58370,16 @@ static bool fx_tree_in(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_point
 
     case HOP_SAFE_C_SSS:
       if ((cadr(p) == var1) && ((caddr(p) == var2) && ((fx_proc(tree) == fx_c_sss) || (fx_proc(tree) == fx_c_sss_direct))))
-	return(with_fx(tree, (cadddr(p) == var3) ? ((fx_proc(tree) == fx_c_sss_direct) ? fx_c_tuv_direct : fx_c_tuv) : fx_c_tus));
+        return(with_fx(tree, (cadddr(p) == var3) ? ((fx_proc(tree) == fx_c_sss_direct) ? fx_c_tuv_direct : fx_c_tuv) : fx_c_tus));
       if (caddr(p) == var1)
-	{
-	  if (car(p) == sc->vector_set_symbol)
-	    {
-	      if ((!more_vars) && (o_var_ok(cadr(p), var1, var2, var3)) && (o_var_ok(cadddr(p), var1, var2, var3))) return(with_fx(tree, fx_vset_oto));
-	      return(with_fx(tree, fx_vset_sts));
-	    }
-	  return(with_fx(tree, fx_c_sts));
-	}
+        {
+          if (car(p) == sc->vector_set_symbol)
+            {
+              if ((!more_vars) && (o_var_ok(cadr(p), var1, var2, var3)) && (o_var_ok(cadddr(p), var1, var2, var3))) return(with_fx(tree, fx_vset_oto));
+              return(with_fx(tree, fx_vset_sts));
+            }
+          return(with_fx(tree, fx_c_sts));
+        }
       break;
 
     case HOP_SAFE_C_SSA:
@@ -58389,225 +58389,225 @@ static bool fx_tree_in(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_point
 
     case HOP_SAFE_C_opSq:
       if (cadadr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_is_pair_car_s)    return(with_fx(tree, fx_is_pair_car_t));
-	  if (fx_proc(tree) == fx_is_pair_cdr_s)    return(with_fx(tree, fx_is_pair_cdr_t));
-	  if (fx_proc(tree) == fx_is_pair_cadr_s)   return(with_fx(tree, fx_is_pair_cadr_t));
-	  if (fx_proc(tree) == fx_is_symbol_cadr_s) return(with_fx(tree, fx_is_symbol_cadr_t));
-	  if (fx_proc(tree) == fx_is_pair_cddr_s)   return(with_fx(tree, fx_is_pair_cddr_t));
-	  if (fx_proc(tree) == fx_is_null_cdr_s)    return(with_fx(tree, fx_is_null_cdr_t));
-	  if (fx_proc(tree) == fx_is_null_cadr_s)   return(with_fx(tree, fx_is_null_cadr_t));
-	  if (fx_proc(tree) == fx_is_null_cddr_s)   return(with_fx(tree, fx_is_null_cddr_t));
-	  if (fx_proc(tree) == fx_not_is_pair_s)    return(with_fx(tree, fx_not_is_pair_t));
-	  if (fx_proc(tree) == fx_not_is_null_s)    return(with_fx(tree, fx_not_is_null_t));
-	  if (fx_proc(tree) == fx_not_is_symbol_s)  return(with_fx(tree, fx_not_is_symbol_t));
-	  if (fx_proc(tree) == fx_is_type_car_s)
-	    return(with_fx(tree, (car(p) == sc->is_symbol_symbol) ? fx_is_symbol_car_t : fx_is_type_car_t));
-	  if (fx_proc(tree) == fx_c_opsq)
-	    {
-	      set_opt1_sym(cdr(p), cadadr(p));
-	      if ((is_global_and_has_func(car(p), s7_p_p_function)) &&
-		  (is_global_and_has_func(caadr(p), s7_p_p_function)))
-		{
-		  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(car(p)))));
-		  set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
-		  return(with_fx(tree, fx_c_optq_direct));
-		}
-	      return(with_fx(tree, fx_c_optq));
-	    }
-	  if (fx_proc(tree) == fx_c_car_s) return(with_fx(tree, fx_c_car_t));
-	  if (fx_proc(tree) == fx_c_cdr_s) return(with_fx(tree, fx_c_cdr_t));
-	  if (fx_proc(tree) == fx_is_type_opsq) return(with_fx(tree, fx_is_type_optq));
-	  if (fx_proc(tree) == fx_not_opsq)
-	    {
-	      set_opt3_sym(p, cadadr(p));
-	      return(with_fx(tree, (caadr(p) == sc->car_symbol) ? fx_not_car_t : fx_not_optq));
-	    }}
+        {
+          if (fx_proc(tree) == fx_is_pair_car_s)    return(with_fx(tree, fx_is_pair_car_t));
+          if (fx_proc(tree) == fx_is_pair_cdr_s)    return(with_fx(tree, fx_is_pair_cdr_t));
+          if (fx_proc(tree) == fx_is_pair_cadr_s)   return(with_fx(tree, fx_is_pair_cadr_t));
+          if (fx_proc(tree) == fx_is_symbol_cadr_s) return(with_fx(tree, fx_is_symbol_cadr_t));
+          if (fx_proc(tree) == fx_is_pair_cddr_s)   return(with_fx(tree, fx_is_pair_cddr_t));
+          if (fx_proc(tree) == fx_is_null_cdr_s)    return(with_fx(tree, fx_is_null_cdr_t));
+          if (fx_proc(tree) == fx_is_null_cadr_s)   return(with_fx(tree, fx_is_null_cadr_t));
+          if (fx_proc(tree) == fx_is_null_cddr_s)   return(with_fx(tree, fx_is_null_cddr_t));
+          if (fx_proc(tree) == fx_not_is_pair_s)    return(with_fx(tree, fx_not_is_pair_t));
+          if (fx_proc(tree) == fx_not_is_null_s)    return(with_fx(tree, fx_not_is_null_t));
+          if (fx_proc(tree) == fx_not_is_symbol_s)  return(with_fx(tree, fx_not_is_symbol_t));
+          if (fx_proc(tree) == fx_is_type_car_s)
+            return(with_fx(tree, (car(p) == sc->is_symbol_symbol) ? fx_is_symbol_car_t : fx_is_type_car_t));
+          if (fx_proc(tree) == fx_c_opsq)
+            {
+              set_opt1_sym(cdr(p), cadadr(p));
+              if ((is_global_and_has_func(car(p), s7_p_p_function)) &&
+                  (is_global_and_has_func(caadr(p), s7_p_p_function)))
+                {
+                  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(car(p)))));
+                  set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
+                  return(with_fx(tree, fx_c_optq_direct));
+                }
+              return(with_fx(tree, fx_c_optq));
+            }
+          if (fx_proc(tree) == fx_c_car_s) return(with_fx(tree, fx_c_car_t));
+          if (fx_proc(tree) == fx_c_cdr_s) return(with_fx(tree, fx_c_cdr_t));
+          if (fx_proc(tree) == fx_is_type_opsq) return(with_fx(tree, fx_is_type_optq));
+          if (fx_proc(tree) == fx_not_opsq)
+            {
+              set_opt3_sym(p, cadadr(p));
+              return(with_fx(tree, (caadr(p) == sc->car_symbol) ? fx_not_car_t : fx_not_optq));
+            }}
       if (cadadr(p) == var2)
-	{
-	  if (fx_proc(tree) == fx_c_car_s) return(with_fx(tree, fx_c_car_u));
-	  if (fx_proc(tree) == fx_not_is_null_s) return(with_fx(tree, fx_not_is_null_u));
-	  if (fx_proc(tree) == fx_not_is_pair_s) return(with_fx(tree, fx_not_is_pair_u));
-	  if (fx_proc(tree) == fx_is_pair_cdr_s) return(with_fx(tree, fx_is_pair_cdr_u));
-	}
+        {
+          if (fx_proc(tree) == fx_c_car_s) return(with_fx(tree, fx_c_car_u));
+          if (fx_proc(tree) == fx_not_is_null_s) return(with_fx(tree, fx_not_is_null_u));
+          if (fx_proc(tree) == fx_not_is_pair_s) return(with_fx(tree, fx_not_is_pair_u));
+          if (fx_proc(tree) == fx_is_pair_cdr_s) return(with_fx(tree, fx_is_pair_cdr_u));
+        }
       if (cadadr(p) == var3)
-	{
-	  if (fx_proc(tree) == fx_not_is_pair_s) return(with_fx(tree, fx_not_is_pair_v));
-	}
+        {
+          if (fx_proc(tree) == fx_not_is_pair_s) return(with_fx(tree, fx_not_is_pair_v));
+        }
       break;
 
     case HOP_SAFE_C_opSq_S:
       if (cadadr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_c_opsq_s)
-	    {
-	      if ((is_global_and_has_func(car(p), s7_p_pp_function)) &&
-		  (is_global_and_has_func(caadr(p), s7_p_p_function)))
-		{
-		  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
-		  set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
-		  return(with_fx(tree, fx_c_optq_s_direct));
-		}
-	      return(with_fx(tree, fx_c_optq_s));
-	    }
-	  if (fx_proc(tree) == fx_c_opsq_s_direct) return(with_fx(tree, fx_c_optq_s_direct));
-	  if (fx_proc(tree) == fx_cons_car_s_s)
-	    {
-	      set_opt1_sym(cdr(p), var1);
-	      return(with_fx(tree, (caddr(p) == var3) ? fx_cons_car_t_v : fx_cons_car_t_s));
-	    }}
+        {
+          if (fx_proc(tree) == fx_c_opsq_s)
+            {
+              if ((is_global_and_has_func(car(p), s7_p_pp_function)) &&
+                  (is_global_and_has_func(caadr(p), s7_p_p_function)))
+                {
+                  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
+                  set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
+                  return(with_fx(tree, fx_c_optq_s_direct));
+                }
+              return(with_fx(tree, fx_c_optq_s));
+            }
+          if (fx_proc(tree) == fx_c_opsq_s_direct) return(with_fx(tree, fx_c_optq_s_direct));
+          if (fx_proc(tree) == fx_cons_car_s_s)
+            {
+              set_opt1_sym(cdr(p), var1);
+              return(with_fx(tree, (caddr(p) == var3) ? fx_cons_car_t_v : fx_cons_car_t_s));
+            }}
       if (cadadr(p) == var2)
-	{
-	  if ((fx_proc(tree) == fx_c_opsq_s) && (caddr(p) == var1))
-	    {
-	      if ((is_global_and_has_func(car(p), s7_p_pp_function)) &&
-		  (is_global_and_has_func(caadr(p), s7_p_p_function))) /* (memq (car sequence) items) lint */
-		{
-		  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
-		  set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
-		  return(with_fx(tree, (car(p) == sc->cons_symbol) ?
-				     ((caadr(p) == sc->car_symbol) ? fx_cons_car_u_t : fx_cons_opuq_t) : fx_c_opuq_t_direct));
-		}
-	      return(with_fx(tree, fx_c_opuq_t));
-	    }
-	  if (((fx_proc(tree) == fx_c_opsq_s_direct) || (fx_proc(tree) == fx_cons_car_s_s)) &&
-	      (caddr(p) == var1))
-	    return(with_fx(tree, (car(p) == sc->cons_symbol) ?
-			   ((caadr(p) == sc->car_symbol) ? fx_cons_car_u_t : fx_cons_opuq_t) : fx_c_opuq_t_direct));
-	}
+        {
+          if ((fx_proc(tree) == fx_c_opsq_s) && (caddr(p) == var1))
+            {
+              if ((is_global_and_has_func(car(p), s7_p_pp_function)) &&
+                  (is_global_and_has_func(caadr(p), s7_p_p_function))) /* (memq (car sequence) items) lint */
+                {
+                  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
+                  set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
+                  return(with_fx(tree, (car(p) == sc->cons_symbol) ?
+                                     ((caadr(p) == sc->car_symbol) ? fx_cons_car_u_t : fx_cons_opuq_t) : fx_c_opuq_t_direct));
+                }
+              return(with_fx(tree, fx_c_opuq_t));
+            }
+          if (((fx_proc(tree) == fx_c_opsq_s_direct) || (fx_proc(tree) == fx_cons_car_s_s)) &&
+              (caddr(p) == var1))
+            return(with_fx(tree, (car(p) == sc->cons_symbol) ?
+                           ((caadr(p) == sc->car_symbol) ? fx_cons_car_u_t : fx_cons_opuq_t) : fx_c_opuq_t_direct));
+        }
       break;
 
     case HOP_SAFE_C_S_opSq:
       if (cadr(p) == var1)
-	{
-	  if (cadaddr(p) == var2)
-	    {
-	      if (fx_proc(tree) == fx_c_s_car_s) return(with_fx(tree, fx_c_t_car_u));
-	      if (fx_proc(tree) == fx_c_s_opsq_direct) return(with_fx(tree, fx_c_t_opuq_direct));
-	    }
-	  if (cadaddr(p) == var3)
-	    {
-	      if (fx_proc(tree) == fx_add_s_car_s) return(with_fx(tree, fx_add_t_car_v));
-	      if (fx_proc(tree) == fx_c_s_car_s) return(with_fx(tree, fx_c_t_car_v)); /* ideally eq_p_pp not g_is_eq */
-	    }
-	  if (fx_proc(tree) == fx_c_s_opsq_direct) return(with_fx(tree, fx_c_t_opsq_direct));
-	}
+        {
+          if (cadaddr(p) == var2)
+            {
+              if (fx_proc(tree) == fx_c_s_car_s) return(with_fx(tree, fx_c_t_car_u));
+              if (fx_proc(tree) == fx_c_s_opsq_direct) return(with_fx(tree, fx_c_t_opuq_direct));
+            }
+          if (cadaddr(p) == var3)
+            {
+              if (fx_proc(tree) == fx_add_s_car_s) return(with_fx(tree, fx_add_t_car_v));
+              if (fx_proc(tree) == fx_c_s_car_s) return(with_fx(tree, fx_c_t_car_v)); /* ideally eq_p_pp not g_is_eq */
+            }
+          if (fx_proc(tree) == fx_c_s_opsq_direct) return(with_fx(tree, fx_c_t_opsq_direct));
+        }
       if (cadr(p) == var2)
-	{
-	  if ((fx_proc(tree) == fx_add_s_car_s) && (cadaddr(p) == var1)) return(with_fx(tree, fx_add_u_car_t));
-	  if ((fx_proc(tree) == fx_c_s_opsq_direct) && (cadaddr(p) == var3)) return(with_fx(tree, fx_c_u_opvq_direct));
-	}
+        {
+          if ((fx_proc(tree) == fx_add_s_car_s) && (cadaddr(p) == var1)) return(with_fx(tree, fx_add_u_car_t));
+          if ((fx_proc(tree) == fx_c_s_opsq_direct) && (cadaddr(p) == var3)) return(with_fx(tree, fx_c_u_opvq_direct));
+        }
       if ((cadaddr(p) == var1) && (fx_proc(tree) == fx_c_s_car_s)) return(with_fx(tree, fx_c_s_car_t));
       break;
 
     case HOP_SAFE_C_opSq_opSq:
       if ((fx_proc(tree) == fx_c_opsq_opsq_direct) && (cadadr(p) == var1) && (cadadr(p) == cadaddr(p)))
-	{
-	  set_opt1_sym(cdr(p), cadadr(p));
-	  return(with_fx(tree, fx_c_optq_optq_direct));   /* opuq got few hits */
-	}
+        {
+          set_opt1_sym(cdr(p), cadadr(p));
+          return(with_fx(tree, fx_c_optq_optq_direct));   /* opuq got few hits */
+        }
       if (((fx_proc(tree) == fx_c_opsq_opsq_direct) || (fx_proc(tree) == fx_car_s_car_s)) &&
-	  ((caadr(p) == sc->car_symbol) && (caadr(p) == caaddr(p))))
-	{
-	  set_opt1_sym(cdr(p), cadadr(p));
-	  set_opt2_sym(cdr(p), cadaddr(p));
-	  return(with_fx(tree, ((cadadr(p) == var1) && (cadaddr(p) == var2)) ?
-			 ((opt3_direct(p) == (s7_pointer)is_eq_p_pp) ? fx_is_eq_car_car_tu : fx_car_t_car_u) : fx_car_s_car_s));
-	}
+          ((caadr(p) == sc->car_symbol) && (caadr(p) == caaddr(p))))
+        {
+          set_opt1_sym(cdr(p), cadadr(p));
+          set_opt2_sym(cdr(p), cadaddr(p));
+          return(with_fx(tree, ((cadadr(p) == var1) && (cadaddr(p) == var2)) ?
+                         ((opt3_direct(p) == (s7_pointer)is_eq_p_pp) ? fx_is_eq_car_car_tu : fx_car_t_car_u) : fx_car_s_car_s));
+        }
       break;
 
     case HOP_SAFE_C_opSq_C:
       if (cadadr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_is_eq_car_sq) return(with_fx(tree, fx_is_eq_car_tq));
-	  if ((fx_proc(tree) == fx_c_opsq_c) || (fx_proc(tree) == fx_c_optq_c))
-	    {
-	      if (fn_proc(p) != g_simple_let_ref) /* don't step on opt3_sym */
-		{
-		  if ((is_global_and_has_func(car(p), s7_p_pp_function)) &&
-		      (is_global_and_has_func(caadr(p), s7_p_p_function)))
-		    {
-		      if (fn_proc(p) == g_memq_2)
-			set_opt3_direct(p, (s7_pointer)memq_2_p_pp);
-		      else set_opt3_direct(p, (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
-		      set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
-		      set_fx_direct(tree, fx_c_optq_c_direct);
-		      return(true);
-		    }
-		  if ((is_t_integer(caddr(p))) &&
-		      (is_global_and_has_func(caadr(p), s7_i_7p_function)) &&
-		      (is_global_and_has_func(car(p), s7_p_ii_function)))
-		    {
-		      set_opt3_direct(p, (s7_pointer)(s7_p_ii_function(global_value(car(p)))));
-		      set_opt3_direct(cdr(p), (s7_pointer)(s7_i_7p_function(global_value(caadr(p)))));
-		      set_fx_direct(tree, fx_c_optq_i_direct);
-		    }
-		  else set_fx_direct(tree, fx_c_optq_c);
-		}
-	      return(true);
-	    }}
+        {
+          if (fx_proc(tree) == fx_is_eq_car_sq) return(with_fx(tree, fx_is_eq_car_tq));
+          if ((fx_proc(tree) == fx_c_opsq_c) || (fx_proc(tree) == fx_c_optq_c))
+            {
+              if (fn_proc(p) != g_simple_let_ref) /* don't step on opt3_sym */
+                {
+                  if ((is_global_and_has_func(car(p), s7_p_pp_function)) &&
+                      (is_global_and_has_func(caadr(p), s7_p_p_function)))
+                    {
+                      if (fn_proc(p) == g_memq_2)
+                        set_opt3_direct(p, (s7_pointer)memq_2_p_pp);
+                      else set_opt3_direct(p, (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
+                      set_opt3_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
+                      set_fx_direct(tree, fx_c_optq_c_direct);
+                      return(true);
+                    }
+                  if ((is_t_integer(caddr(p))) &&
+                      (is_global_and_has_func(caadr(p), s7_i_7p_function)) &&
+                      (is_global_and_has_func(car(p), s7_p_ii_function)))
+                    {
+                      set_opt3_direct(p, (s7_pointer)(s7_p_ii_function(global_value(car(p)))));
+                      set_opt3_direct(cdr(p), (s7_pointer)(s7_i_7p_function(global_value(caadr(p)))));
+                      set_fx_direct(tree, fx_c_optq_i_direct);
+                    }
+                  else set_fx_direct(tree, fx_c_optq_c);
+                }
+              return(true);
+            }}
       break;
 
     case HOP_SAFE_C_opSSq:
       if (fx_proc(tree) == fx_c_opssq)
-	{
-	  if (caddadr(p) == var1) return(with_fx(tree, fx_c_opstq));
-	  if ((cadadr(p) == var1) && (caddadr(p) == var2)) return(with_fx(tree, fx_c_optuq));
-	}
+        {
+          if (caddadr(p) == var1) return(with_fx(tree, fx_c_opstq));
+          if ((cadadr(p) == var1) && (caddadr(p) == var2)) return(with_fx(tree, fx_c_optuq));
+        }
       if (fx_proc(tree) == fx_c_opssq_direct)
-	{
-	  if ((cadadr(p) == var1) && (caddadr(p) == var2)) return(with_fx(tree, fx_c_optuq_direct));
-	  if (caddadr(p) == var1)
-	    {
-	      if ((opt2_direct(cdr(p)) == (s7_pointer)is_zero_p_p) && (opt3_direct(cdr(p)) == (s7_pointer)remainder_p_pp) &&
-		  (!more_vars) && (o_var_ok(cadadr(p), var1, var2, var3)))
-		return(with_fx(tree, fx_is_zero_remainder_o));
-	      return(with_fx(tree, fx_c_opstq_direct));
-	    }}
+        {
+          if ((cadadr(p) == var1) && (caddadr(p) == var2)) return(with_fx(tree, fx_c_optuq_direct));
+          if (caddadr(p) == var1)
+            {
+              if ((opt2_direct(cdr(p)) == (s7_pointer)is_zero_p_p) && (opt3_direct(cdr(p)) == (s7_pointer)remainder_p_pp) &&
+                  (!more_vars) && (o_var_ok(cadadr(p), var1, var2, var3)))
+                return(with_fx(tree, fx_is_zero_remainder_o));
+              return(with_fx(tree, fx_c_opstq_direct));
+            }}
       if ((cadadr(p) == var2) && (fx_proc(tree) == fx_not_opssq) && (caddadr(p) == var1))
-	{
-	  set_fx_direct(tree, (fn_proc(cadr(p)) == g_less_2) ? fx_not_lt_ut : fx_not_oputq);
-	  return(true);
-	}
+        {
+          set_fx_direct(tree, (fn_proc(cadr(p)) == g_less_2) ? fx_not_lt_ut : fx_not_oputq);
+          return(true);
+        }
       break;
 
     case HOP_SAFE_C_opSCq:
       if (cadadr(p) == var1)
-	{
-	  if ((fn_proc(p) == g_is_zero) && (fn_proc(cadr(p)) == g_remainder) &&
-	      (is_t_integer(caddadr(p))) && (integer(caddadr(p)) > 1))
-	    return(with_fx(tree, fx_is_zero_remainder_ti));
-	  return(with_fx(tree, fx_c_optcq)); /* there currently isn't any fx_c_opscq_direct */
-	}
+        {
+          if ((fn_proc(p) == g_is_zero) && (fn_proc(cadr(p)) == g_remainder) &&
+              (is_t_integer(caddadr(p))) && (integer(caddadr(p)) > 1))
+            return(with_fx(tree, fx_is_zero_remainder_ti));
+          return(with_fx(tree, fx_c_optcq)); /* there currently isn't any fx_c_opscq_direct */
+        }
       break;
 
     case HOP_SAFE_C_opSSq_C:
       if ((fx_proc(tree) == fx_c_opssq_c) && (caddadr(p) == var1))
-	{
-	  if (is_global_and_has_func(car(p), s7_p_pp_function))
-	    {
-	      if ((car(p) == sc->is_eq_symbol) && (!is_unspecified(caddr(p))) && (caadr(p) == sc->vector_ref_symbol) &&
-		  (!more_vars) && (o_var_ok(cadadr(p), var1, var2, var3)))
-		return(with_fx(tree, fx_is_eq_vref_opotq_c));
-	      set_opt3_direct(p, (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
-	      return(with_fx(tree, fx_c_opstq_c_direct));
-	    }
-	  return(with_fx(tree, fx_c_opstq_c));
-	}
+        {
+          if (is_global_and_has_func(car(p), s7_p_pp_function))
+            {
+              if ((car(p) == sc->is_eq_symbol) && (!is_unspecified(caddr(p))) && (caadr(p) == sc->vector_ref_symbol) &&
+                  (!more_vars) && (o_var_ok(cadadr(p), var1, var2, var3)))
+                return(with_fx(tree, fx_is_eq_vref_opotq_c));
+              set_opt3_direct(p, (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
+              return(with_fx(tree, fx_c_opstq_c_direct));
+            }
+          return(with_fx(tree, fx_c_opstq_c));
+        }
       break;
 
     case HOP_SAFE_C_S_opSCq:
       if (cadr(p) == var1)
-	{
-	  if (fx_proc(tree) == fx_c_s_opscq_direct) return(with_fx(tree, (cadaddr(p) == var2) ? fx_c_t_opucq_direct : fx_c_t_opscq_direct));
-      	  if ((fx_proc(tree) == fx_c_s_opsiq_direct) && (!more_vars) && (o_var_ok(cadaddr(p), var1, var2, var3))) return(with_fx(tree, fx_c_t_opoiq_direct));
-	}
+        {
+          if (fx_proc(tree) == fx_c_s_opscq_direct) return(with_fx(tree, (cadaddr(p) == var2) ? fx_c_t_opucq_direct : fx_c_t_opscq_direct));
+                if ((fx_proc(tree) == fx_c_s_opsiq_direct) && (!more_vars) && (o_var_ok(cadaddr(p), var1, var2, var3))) return(with_fx(tree, fx_c_t_opoiq_direct));
+        }
       else
-	if ((cadr(p) == var2) && (cadaddr(p) == var1))
-	  {
-	    if (fx_proc(tree) == fx_c_s_opsiq_direct) return(with_fx(tree, fx_c_u_optiq_direct));
-	    if (fx_proc(tree) == fx_c_s_opscq) return(with_fx(tree, fx_c_u_optcq));
-	  }
+        if ((cadr(p) == var2) && (cadaddr(p) == var1))
+          {
+            if (fx_proc(tree) == fx_c_s_opsiq_direct) return(with_fx(tree, fx_c_u_optiq_direct));
+            if (fx_proc(tree) == fx_c_s_opscq) return(with_fx(tree, fx_c_u_optcq));
+          }
       break;
 
     case HOP_SAFE_C_opSq_CS:
@@ -58616,67 +58616,67 @@ static bool fx_tree_in(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_point
 
     case HOP_SAFE_C_opSq_opSSq:
       if ((fx_proc(tree) == fx_c_opsq_opssq) && (cadaddr(p) == var1) && (caddaddr(p) == var2) &&
-	  (is_global_and_has_func(car(p), s7_p_pp_function)) &&
-	  (is_global_and_has_func(caadr(p), s7_p_p_function)) &&
-	  (is_global_and_has_func(caaddr(p), s7_p_pp_function)))
-	{
-	  set_opt3_direct(p, (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
-	  set_opt2_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
-	  set_opt3_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(caaddr(p)))));
-	  set_opt1_sym(cdr(p), var2); /* caddaddr(p) */
-
-	  set_opt2_sym(cddr(p), var1);
-	  if ((car(p) == sc->num_eq_symbol) && (caadr(p) == sc->car_symbol) && (cadadr(p) == var3))
-	    {
-	      if (caaddr(p) == sc->add_symbol) return(with_fx(tree, fx_num_eq_car_v_add_tu));
-	      if (caaddr(p) == sc->subtract_symbol) return(with_fx(tree, fx_num_eq_car_v_subtract_tu));
-	    }
-	  return(with_fx(tree, fx_c_opsq_optuq_direct));
-	}
+          (is_global_and_has_func(car(p), s7_p_pp_function)) &&
+          (is_global_and_has_func(caadr(p), s7_p_p_function)) &&
+          (is_global_and_has_func(caaddr(p), s7_p_pp_function)))
+        {
+          set_opt3_direct(p, (s7_pointer)(s7_p_pp_function(global_value(car(p)))));
+          set_opt2_direct(cdr(p), (s7_pointer)(s7_p_p_function(global_value(caadr(p)))));
+          set_opt3_direct(cdr(p), (s7_pointer)(s7_p_pp_function(global_value(caaddr(p)))));
+          set_opt1_sym(cdr(p), var2); /* caddaddr(p) */
+
+          set_opt2_sym(cddr(p), var1);
+          if ((car(p) == sc->num_eq_symbol) && (caadr(p) == sc->car_symbol) && (cadadr(p) == var3))
+            {
+              if (caaddr(p) == sc->add_symbol) return(with_fx(tree, fx_num_eq_car_v_add_tu));
+              if (caaddr(p) == sc->subtract_symbol) return(with_fx(tree, fx_num_eq_car_v_subtract_tu));
+            }
+          return(with_fx(tree, fx_c_opsq_optuq_direct));
+        }
       break;
 
     case HOP_SAFE_C_opSSq_S:
       if (fx_proc(tree) == fx_vref_vref_ss_s)
-	{
-	  if ((caddr(p) == var1) && (is_global(cadadr(p))))
-	    {
-	      if ((!more_vars) && (o_var_ok(caddadr(p), var1, var2, var3))) return(with_fx(tree, fx_vref_vref_go_t));
-	      return(with_fx(tree, fx_vref_vref_gs_t));
-	    }
-	  if ((cadadr(p) == var1) && (caddadr(p) == var2) && (caddr(p) == var3)) return(with_fx(tree, fx_vref_vref_tu_v));
-	}
+        {
+          if ((caddr(p) == var1) && (is_global(cadadr(p))))
+            {
+              if ((!more_vars) && (o_var_ok(caddadr(p), var1, var2, var3))) return(with_fx(tree, fx_vref_vref_go_t));
+              return(with_fx(tree, fx_vref_vref_gs_t));
+            }
+          if ((cadadr(p) == var1) && (caddadr(p) == var2) && (caddr(p) == var3)) return(with_fx(tree, fx_vref_vref_tu_v));
+        }
       if ((fx_proc(tree) == fx_gt_add_s) && (cadadr(p) == var1) && (caddadr(p) == var2))
-	return(with_fx(tree, fx_gt_add_tu_s));
+        return(with_fx(tree, fx_gt_add_tu_s));
       if ((fx_proc(tree) == fx_add_sub_s) && (cadadr(p) == var1) && (caddadr(p) == var2))
-	return(with_fx(tree, fx_add_sub_tu_s));
+        return(with_fx(tree, fx_add_sub_tu_s));
       break;
 
     case HOP_SAFE_C_S_opSSq:
       if (caddaddr(p) == var1)
-	{
-	  if ((fn_proc(p) == g_vector_ref_2) && (is_global(cadr(p)) && (is_global(cadaddr(p)))))
-	    {
-	      set_opt3_pair(p, cdaddr(p));
-	      return(with_fx(tree, fx_vref_g_vref_gt));
-	    }
-	  if (fx_proc(tree) == fx_c_s_opssq_direct) return(with_fx(tree, fx_c_s_opstq_direct));
-	}
+        {
+          if ((fn_proc(p) == g_vector_ref_2) && (is_global(cadr(p)) && (is_global(cadaddr(p)))))
+            {
+              set_opt3_pair(p, cdaddr(p));
+              return(with_fx(tree, fx_vref_g_vref_gt));
+            }
+          if (fx_proc(tree) == fx_c_s_opssq_direct) return(with_fx(tree, fx_c_s_opstq_direct));
+        }
       if ((fx_proc(tree) == fx_c_s_opssq_direct) && (cadr(p) == var1) && (caddaddr(p) == var2)) return(with_fx(tree, fx_c_t_opsuq_direct));
       break;
 
     case HOP_SAFE_C_op_opSq_Sq:
       if ((car(p) == sc->not_symbol) && (is_global(sc->not_symbol)) && (var1 == cadr(cadadr(p))))
-	return(with_fx(tree, fx_not_op_optq_sq));
+        return(with_fx(tree, fx_not_op_optq_sq));
       break;
 
     case HOP_SAFE_C_AC:
       if (((fx_proc(tree) == fx_c_ac) || (fx_proc(tree) == fx_c_ac_direct)) && (fn_proc(p) == g_num_eq_xi) && (caddr(p) == int_zero) &&
-	  (fx_proc(cdr(p)) == fx_c_opuq_t_direct) && (caadr(p) == sc->remainder_symbol) && (fn_proc(cadadr(p)) == g_car))
-	{
-	  set_opt3_sym(p, cadr(cadadr(p)));
-	  set_opt1_sym(cdr(p), caddadr(p));
-	  return(with_fx(tree, fx_is_zero_remainder_car));
-	}
+          (fx_proc(cdr(p)) == fx_c_opuq_t_direct) && (caadr(p) == sc->remainder_symbol) && (fn_proc(cadadr(p)) == g_car))
+        {
+          set_opt3_sym(p, cadr(cadadr(p)));
+          set_opt1_sym(cdr(p), caddadr(p));
+          return(with_fx(tree, fx_is_zero_remainder_car));
+        }
       break;
 
     case HOP_SAFE_CLOSURE_S_A:
@@ -58689,17 +58689,17 @@ static bool fx_tree_in(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_point
 
     case OP_AND_3A:
       if ((fx_proc(tree) == fx_and_3a) &&
-	  (is_pair(cadr(p))) &&
-	  (is_pair(cdadr(p))) && (cadadr(p) == var1) && /* so "s" below is "t" */
-	  (((fx_proc(cdr(p)) == fx_is_pair_t) && (fx_proc(cddr(p)) == fx_is_pair_cdr_t)) ||
-	      ((fx_proc(cdr(p)) == fx_is_pair_s) && (fx_proc(cddr(p)) == fx_is_pair_cdr_s))))
-	{
-	  set_opt1_sym(cdr(p), cadadr(p));
-	  if ((fx_proc(cdddr(p)) == fx_is_null_cddr_t) || (fx_proc(cdddr(p)) == fx_is_null_cddr_s))
-	    return(with_fx(tree, fx_len2_t));
-	  if ((fx_proc(cdddr(p)) == fx_is_pair_cddr_t) || (fx_proc(cdddr(p)) == fx_is_pair_cddr_s))
-	    return(with_fx(tree, fx_len3_t));
-	}
+          (is_pair(cadr(p))) &&
+          (is_pair(cdadr(p))) && (cadadr(p) == var1) && /* so "s" below is "t" */
+          (((fx_proc(cdr(p)) == fx_is_pair_t) && (fx_proc(cddr(p)) == fx_is_pair_cdr_t)) ||
+              ((fx_proc(cdr(p)) == fx_is_pair_s) && (fx_proc(cddr(p)) == fx_is_pair_cdr_s))))
+        {
+          set_opt1_sym(cdr(p), cadadr(p));
+          if ((fx_proc(cdddr(p)) == fx_is_null_cddr_t) || (fx_proc(cdddr(p)) == fx_is_null_cddr_s))
+            return(with_fx(tree, fx_len2_t));
+          if ((fx_proc(cdddr(p)) == fx_is_pair_cddr_t) || (fx_proc(cdddr(p)) == fx_is_pair_cddr_s))
+            return(with_fx(tree, fx_len3_t));
+        }
       break;
      }
   return(false);
@@ -58713,8 +58713,8 @@ static void fx_tree(s7_scheme *sc, s7_pointer tree, s7_pointer var1, s7_pointer
       (is_definer_or_binder(car(tree))))
     {
       if ((car(tree) == sc->let_symbol) && (is_pair(cdr(tree))) && (is_pair(cadr(tree))) &&
-	  (is_null(cdadr(tree))) && (is_pair(caadr(tree)))) /* (let (a) ...) */
-	fx_tree(sc, cddr(tree), caaadr(tree), NULL, NULL, more_vars);
+          (is_null(cdadr(tree))) && (is_pair(caadr(tree)))) /* (let (a) ...) */
+        fx_tree(sc, cddr(tree), caaadr(tree), NULL, NULL, more_vars);
       return;
     }
   if (is_syntax(car(tree))) return; /* someday let #_when/#_if etc through -- the symbol 'if, for example, is not syntax */
@@ -58742,11 +58742,11 @@ static void add_opt_func(s7_scheme *sc, s7_pointer f, opt_func_t typ, void *func
   opt_funcs_t *op;
 #if S7_DEBUGGING
   static const char *o_names[] = {"o_d_v", "o_d_vd", "o_d_vdd", "o_d_vid", "o_d_id", "o_d_7pi", "o_d_7pii", "o_d_7piid", "o_d_7piii", "o_d_7piiid",
-				"o_d_ip", "o_d_pd", "o_d_7pid",	"o_d", "o_d_d", "o_d_dd", "o_d_7dd", "o_d_ddd", "o_d_dddd",
-				"o_i_i", "o_i_7i", "o_i_ii", "o_i_7ii", "o_i_iii", "o_i_7pi", "o_i_7pii", "o_i_7_piii", "o_d_p",
-				"o_b_p", "o_b_7p", "o_b_pp", "o_b_7pp", "o_b_pp_unchecked", "o_b_pi", "o_b_ii", "o_b_7ii", "o_b_dd",
-				"o_p", "o_p_p", "o_p_ii", "o_p_d", "o_p_dd", "o_i_7d", "o_i_7p", "o_d_7d", "o_p_pp", "o_p_ppp", "o_p_pi", "o_p_pi_unchecked",
-				"o_p_ppi", "o_p_i", "o_p_pii", "o_p_pip", "o_p_pip_unchecked", "o_p_piip", "o_b_i", "o_b_d"};
+                                "o_d_ip", "o_d_pd", "o_d_7pid",        "o_d", "o_d_d", "o_d_dd", "o_d_7dd", "o_d_ddd", "o_d_dddd",
+                                "o_i_i", "o_i_7i", "o_i_ii", "o_i_7ii", "o_i_iii", "o_i_7pi", "o_i_7pii", "o_i_7_piii", "o_d_p",
+                                "o_b_p", "o_b_7p", "o_b_pp", "o_b_7pp", "o_b_pp_unchecked", "o_b_pi", "o_b_ii", "o_b_7ii", "o_b_dd",
+                                "o_p", "o_p_p", "o_p_ii", "o_p_d", "o_p_dd", "o_i_7d", "o_i_7p", "o_d_7d", "o_p_pp", "o_p_ppp", "o_p_pi", "o_p_pi_unchecked",
+                                "o_p_ppi", "o_p_i", "o_p_pii", "o_p_pip", "o_p_pip_unchecked", "o_p_piip", "o_b_i", "o_b_d"};
   if (!is_c_function(f))
     {
       fprintf(stderr, "%s[%d]: %s is not a c_function\n", __func__, __LINE__, display(f));
@@ -58755,14 +58755,14 @@ static void add_opt_func(s7_scheme *sc, s7_pointer f, opt_func_t typ, void *func
   else
     if (c_function_opt_data(f))
       for (opt_funcs_t *p = c_function_opt_data(f); p; p = p->next)
-	{
-	  if (p->typ == typ)
-	    fprintf(stderr, "%s[%d]: %s has a function of type %d (%s)\n",
-		    __func__, __LINE__, display(f), typ, o_names[typ]);
-	  if (p->func == func)
-	    fprintf(stderr, "%s[%d]: %s already has this function as type %d %s (current: %d %s)\n",
-		    __func__, __LINE__, display(f), p->typ, o_names[p->typ], typ, o_names[typ]);
-	}
+        {
+          if (p->typ == typ)
+            fprintf(stderr, "%s[%d]: %s has a function of type %d (%s)\n",
+                    __func__, __LINE__, display(f), typ, o_names[typ]);
+          if (p->func == func)
+            fprintf(stderr, "%s[%d]: %s already has this function as type %d %s (current: %d %s)\n",
+                    __func__, __LINE__, display(f), p->typ, o_names[p->typ], typ, o_names[typ]);
+        }
 #endif
   op = alloc_semipermanent_opt_func(sc);
   op->typ = typ;
@@ -58776,7 +58776,7 @@ static void *opt_func(s7_pointer f, opt_func_t typ)
   if (is_c_function(f))
     for (opt_funcs_t *p = c_function_opt_data(f); p; p = p->next)
       if (p->typ == typ)
-	return(p->func);
+        return(p->func);
   return(NULL);
 }
 
@@ -59013,8 +59013,8 @@ static s7_pointer opt_integer_symbol(s7_scheme *sc, s7_pointer sym)
     {
       s7_pointer p = s7_slot(sc, sym);
       if ((is_slot(p)) &&
-	  (is_t_integer(slot_value(p))))
-	return(p);
+          (is_t_integer(slot_value(p))))
+        return(p);
     }
   return(NULL);
 }
@@ -59025,8 +59025,8 @@ static s7_pointer opt_real_symbol(s7_scheme *sc, s7_pointer sym)
     {
       s7_pointer p = s7_slot(sc, sym);
       if ((is_slot(p)) &&
-	  (is_small_real(slot_value(p))))
-	return(p);
+          (is_small_real(slot_value(p))))
+        return(p);
     }
   return(NULL);
 }
@@ -59037,8 +59037,8 @@ static s7_pointer opt_float_symbol(s7_scheme *sc, s7_pointer sym)
     {
       s7_pointer p = s7_slot(sc, sym);
       if ((is_slot(p)) &&
-	  (is_t_real(slot_value(p))))
-	return(p);
+          (is_t_real(slot_value(p))))
+        return(p);
     }
   return(NULL);
 }
@@ -59060,7 +59060,7 @@ static s7_pointer opt_types_match(s7_scheme *sc, s7_pointer check, s7_pointer sy
     {
       s7_pointer obj = slot_value(slot);
       if (s7_apply_function(sc, checker, set_plist_1(sc, obj)) == sc->T)
-	return(slot);
+        return(slot);
     }
   return(NULL);
 }
@@ -59141,74 +59141,74 @@ static bool i_idp_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if ((func) || (func7))
     {
       if (func)
-	opc->v[2].i_i_f = func;
+        opc->v[2].i_i_f = func;
       else opc->v[2].i_7i_f = func7;
       if (is_t_integer(arg1))
-	{
-	  if (opc->v[2].i_i_f == subtract_i_i)
-	    {
-	      opc->v[1].i = -integer(arg1);
-	      opc->v[0].fi = opt_i_c;
-	    }
-	  else
-	    {
-	      opc->v[1].i = integer(arg1);
-	      opc->v[0].fi = (func) ? opt_i_i_c : opt_i_7i_c;
-	    }
-	  return_true(sc, car_x);
-	}
+        {
+          if (opc->v[2].i_i_f == subtract_i_i)
+            {
+              opc->v[1].i = -integer(arg1);
+              opc->v[0].fi = opt_i_c;
+            }
+          else
+            {
+              opc->v[1].i = integer(arg1);
+              opc->v[0].fi = (func) ? opt_i_i_c : opt_i_7i_c;
+            }
+          return_true(sc, car_x);
+        }
       p = opt_integer_symbol(sc, arg1);
       if (p)
-	{
-	  opc->v[1].p = p;
-	  opc->v[0].fi = (func) ? ((func == abs_i_i) ? opt_i_i_s_abs : opt_i_i_s) : ((func7 == random_i_7i) ? opt_i_7i_s_rand : opt_i_7i_s);
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].p = p;
+          opc->v[0].fi = (func) ? ((func == abs_i_i) ? opt_i_i_s_abs : opt_i_i_s) : ((func7 == random_i_7i) ? opt_i_7i_s_rand : opt_i_7i_s);
+          return_true(sc, car_x);
+        }
       if (int_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[4].fi = sc->opts[start]->v[0].fi;
-	  opc->v[0].fi = (func) ? ((func == abs_i_i) ? opt_i_i_f_abs : opt_i_i_f) : opt_i_7i_f;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[4].fi = sc->opts[start]->v[0].fi;
+          opc->v[0].fi = (func) ? ((func == abs_i_i) ? opt_i_i_f_abs : opt_i_i_f) : opt_i_7i_f;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
     }
   if (!is_t_ratio(arg1))
     {
       s7_i_7d_t idf = s7_i_7d_function(s_func);
       if (idf)
-	{
-	  opc->v[2].i_7d_f = idf;
-	  if (is_small_real(arg1))
-	    {
-	      opc->v[1].x = s7_number_to_real(sc, arg1);
-	      opc->v[0].fi = opt_i_d_c;
-	      return_true(sc, car_x);
-	    }
-	  p = opt_float_symbol(sc, arg1);
-	  if (p)
-	    {
-	      opc->v[1].p = p;
-	      opc->v[0].fi = opt_i_d_s;
-	      return_true(sc, car_x);
-	    }
-	  if (float_optimize(sc, cdr(car_x)))
-	    {
-	      opc->v[0].fi = opt_i_7d_f;
-	      opc->v[4].fd = sc->opts[start]->v[0].fd;
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	}}
+        {
+          opc->v[2].i_7d_f = idf;
+          if (is_small_real(arg1))
+            {
+              opc->v[1].x = s7_number_to_real(sc, arg1);
+              opc->v[0].fi = opt_i_d_c;
+              return_true(sc, car_x);
+            }
+          p = opt_float_symbol(sc, arg1);
+          if (p)
+            {
+              opc->v[1].p = p;
+              opc->v[0].fi = opt_i_d_s;
+              return_true(sc, car_x);
+            }
+          if (float_optimize(sc, cdr(car_x)))
+            {
+              opc->v[0].fi = opt_i_7d_f;
+              opc->v[4].fd = sc->opts[start]->v[0].fd;
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+        }}
   ipf = s7_i_7p_function(s_func);
   if (ipf)
     {
       opc->v[2].i_7p_f = ipf;
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[0].fi = (ipf == char_to_integer_i_7p) ? opt_i_7p_f_cint : opt_i_7p_f;
-	  opc->v[4].fp = sc->opts[start]->v[0].fp;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fi = (ipf == char_to_integer_i_7p) ? opt_i_7p_f_cint : opt_i_7p_f;
+          opc->v[4].fp = sc->opts[start]->v[0].fp;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
     }
   return_false(sc, car_x);
@@ -59229,23 +59229,23 @@ static bool i_7pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if (!pfunc)
     {
       if ((s_func == initial_value(sc->vector_ref_symbol)) && (is_normal_symbol(cadr(car_x)))) /* (vector-ref <int-vector> <int>)? */
-	{
-	  s7_pointer v_slot = s7_slot(sc, cadr(car_x));
-	  if (is_slot(v_slot))
-	    {
-	      s7_pointer v = slot_value(v_slot);
-	      if (is_int_vector(v))
-		{
-		  pfunc = int_vector_ref_i_7pi;
-		  s_func = initial_value(sc->int_vector_ref_symbol);
-		  /* a normal vector can have vector-typer integer? if it's set after vector creation, but that can't be optimized much */
-		}
-	      else
-		if (is_byte_vector(v))
-		  {
-		    pfunc = byte_vector_ref_i_7pi;
-		    s_func = initial_value(sc->byte_vector_ref_symbol);
-		  }}}
+        {
+          s7_pointer v_slot = s7_slot(sc, cadr(car_x));
+          if (is_slot(v_slot))
+            {
+              s7_pointer v = slot_value(v_slot);
+              if (is_int_vector(v))
+                {
+                  pfunc = int_vector_ref_i_7pi;
+                  s_func = initial_value(sc->int_vector_ref_symbol);
+                  /* a normal vector can have vector-typer integer? if it's set after vector creation, but that can't be optimized much */
+                }
+              else
+                if (is_byte_vector(v))
+                  {
+                    pfunc = byte_vector_ref_i_7pi;
+                    s_func = initial_value(sc->byte_vector_ref_symbol);
+                  }}}
       if (!pfunc) return_false(sc, car_x);
     }
   sig = c_function_signature(s_func);
@@ -59254,50 +59254,50 @@ static bool i_7pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       s7_pointer slot, arg1 = cadr(car_x), arg2 = caddr(car_x);
       int32_t start = sc->pc;
       if ((is_symbol(cadr(sig))) &&
-	  (is_symbol(arg1)) &&
-	  (slot = opt_types_match(sc, cadr(sig), arg1)))
-	{
-	  s7_pointer p;
-	  opc->v[1].p = slot;
-	  if ((s_func == global_value(sc->int_vector_ref_symbol)) && /* ivref etc */
-	      ((!is_int_vector(slot_value(slot))) ||
-	       (vector_rank(slot_value(slot)) > 1)))
-	    return_false(sc, car_x);
-	  if ((s_func == global_value(sc->byte_vector_ref_symbol)) && /* bvref etc */
-	      ((!is_byte_vector(slot_value(slot))) ||
-	       (vector_rank(slot_value(slot)) > 1)))
-	    return_false(sc, car_x);
-
-	  opc->v[3].i_7pi_f = pfunc;
-	  p = opt_integer_symbol(sc, arg2);
-	  if (p)
-	    {
-	      opc->v[2].p = p;
-	      opc->v[0].fi = opt_i_7pi_ss;
-	      if ((s_func == global_value(sc->int_vector_ref_symbol)) &&
-		  (loop_end_fits(opc->v[2].p, vector_length(slot_value(opc->v[1].p)))))
-		{
-		  opc->v[0].fi = opt_i_pi_ss_ivref;
-		  opc->v[3].i_7pi_f = int_vector_ref_i_pi_direct;
-		}
-	      else
-		if ((s_func == global_value(sc->byte_vector_ref_symbol)) &&
-		    (loop_end_fits(opc->v[2].p, vector_length(slot_value(opc->v[1].p)))))
-		  {
-		    opc->v[0].fi = opt_i_pi_ss_bvref;
-		    opc->v[3].i_7pi_f = byte_vector_ref_i_7pi_direct;
-		  }
-	      return_true(sc, car_x);
-	    }
-	  opc->v[4].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[0].fi = opt_i_7pi_sf;
-	      opc->v[5].fi = opc->v[4].o1->v[0].fi;
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	}}
+          (is_symbol(arg1)) &&
+          (slot = opt_types_match(sc, cadr(sig), arg1)))
+        {
+          s7_pointer p;
+          opc->v[1].p = slot;
+          if ((s_func == global_value(sc->int_vector_ref_symbol)) && /* ivref etc */
+              ((!is_int_vector(slot_value(slot))) ||
+               (vector_rank(slot_value(slot)) > 1)))
+            return_false(sc, car_x);
+          if ((s_func == global_value(sc->byte_vector_ref_symbol)) && /* bvref etc */
+              ((!is_byte_vector(slot_value(slot))) ||
+               (vector_rank(slot_value(slot)) > 1)))
+            return_false(sc, car_x);
+
+          opc->v[3].i_7pi_f = pfunc;
+          p = opt_integer_symbol(sc, arg2);
+          if (p)
+            {
+              opc->v[2].p = p;
+              opc->v[0].fi = opt_i_7pi_ss;
+              if ((s_func == global_value(sc->int_vector_ref_symbol)) &&
+                  (loop_end_fits(opc->v[2].p, vector_length(slot_value(opc->v[1].p)))))
+                {
+                  opc->v[0].fi = opt_i_pi_ss_ivref;
+                  opc->v[3].i_7pi_f = int_vector_ref_i_pi_direct;
+                }
+              else
+                if ((s_func == global_value(sc->byte_vector_ref_symbol)) &&
+                    (loop_end_fits(opc->v[2].p, vector_length(slot_value(opc->v[1].p)))))
+                  {
+                    opc->v[0].fi = opt_i_pi_ss_bvref;
+                    opc->v[3].i_7pi_f = byte_vector_ref_i_7pi_direct;
+                  }
+              return_true(sc, car_x);
+            }
+          opc->v[4].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cddr(car_x)))
+            {
+              opc->v[0].fi = opt_i_7pi_sf;
+              opc->v[5].fi = opc->v[4].o1->v[0].fi;
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+        }}
   return_false(sc, car_x);
 }
 
@@ -59338,17 +59338,17 @@ static bool i_ii_fc_combinable(s7_scheme *sc, opt_info *opc, s7_i_ii_t func)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if ((o1->v[0].fi == opt_i_7pi_ss) || (o1->v[0].fi == opt_i_pi_ss_ivref))
-	{
-	  opc->v[5].i = opc->v[2].i; /* move v2.i ("c" in fc = arg2) out of the symbols' way */
-	  opc->v[4].i_7pi_f = o1->v[3].i_7pi_f;
-	  opc->v[1].p = o1->v[1].p;
-	  opc->v[2].p = o1->v[2].p;
-	  if (func)
-	    opc->v[0].fi = ((opc->v[3].i_ii_f == add_i_ii) && (opc->v[4].i_7pi_f == int_vector_ref_i_pi_direct)) ? opt_i_ii_fco_ivref_add : opt_i_ii_fco;
-	  else opc->v[0].fi = opt_i_7ii_fco;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[5].i = opc->v[2].i; /* move v2.i ("c" in fc = arg2) out of the symbols' way */
+          opc->v[4].i_7pi_f = o1->v[3].i_7pi_f;
+          opc->v[1].p = o1->v[1].p;
+          opc->v[2].p = o1->v[2].p;
+          if (func)
+            opc->v[0].fi = ((opc->v[3].i_ii_f == add_i_ii) && (opc->v[4].i_7pi_f == int_vector_ref_i_pi_direct)) ? opt_i_ii_fco_ivref_add : opt_i_ii_fco;
+          else opc->v[0].fi = opt_i_7ii_fco;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -59384,7 +59384,7 @@ static bool i_ii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       ifunc7 = s7_i_7ii_function(s_func);
       if (!ifunc7)
-	return_false(sc, car_x);
+        return_false(sc, car_x);
     }
   sig = c_function_signature(s_func);
   if (is_pair(sig))
@@ -59394,191 +59394,191 @@ static bool i_ii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       int32_t start = sc->pc;
       s7_pointer p;
       if (ifunc)
-	opc->v[3].i_ii_f = ifunc;
+        opc->v[3].i_ii_f = ifunc;
       else opc->v[3].i_7ii_f = ifunc7;
 
       if (is_t_integer(arg1))
-	{
-	  opc->v[1].i = integer(arg1);
-	  if (is_t_integer(arg2))
-	    {
-	      if (opc->v[3].i_ii_f == add_i_ii)
-		{
-		  opc->v[1].i = integer(arg1) + integer(arg2); /* no overflow check for sc_add case above */
-		  opc->v[0].fi = opt_i_c;
-		}
-	      else
-		{
-		  opc->v[2].i = integer(arg2);
-		  opc->v[0].fi = (ifunc) ? opt_i_ii_cc : opt_i_7ii_cc;
-		}
-	      return_true(sc, car_x);
-	    }
-	  p = opt_integer_symbol(sc, arg2);
-	  if (p)
-	    {
-	      opc->v[2].p = p;
-	      if (ifunc)
-		opc->v[0].fi = (opc->v[3].i_ii_f == multiply_i_ii) ? opt_i_ii_cs_mul : opt_i_ii_cs;
-	      else opc->v[0].fi = opt_i_7ii_cs;
-	      return_true(sc, car_x);
-	    }
-	  opc->v[4].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cddr(car_x)))
-	    {
-	      if (ifunc)
-		{
-		  opc->v[0].fi = opt_i_ii_cf;       /* sc->opts[start]->v[0].fi -> opt_i_7i_c -> same_opt->v[2].i_7i_f = random_i_7i tmap */
-		  if ((ifunc == add_i_ii) && (opc == sc->opts[sc->pc - 2]) &&
-		      (sc->opts[start]->v[0].fi == opt_i_7i_c) &&
-		      (sc->opts[start]->v[2].i_7i_f == random_i_7i))
-		    {
-		      opc->v[0].fi = opt_add_i_random_i;
-		      opc->v[2].i = sc->opts[start]->v[1].i;
-		      backup_pc(sc);
-		    }
-		  else if (ifunc == multiply_i_ii) opc->v[0].fi = opt_i_ii_cf_mul;
-		}
-	      else opc->v[0].fi = opt_i_7ii_cf;
-	      opc->v[5].fi = opc->v[4].o1->v[0].fi;
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	  return_false(sc, car_x);
-	}
+        {
+          opc->v[1].i = integer(arg1);
+          if (is_t_integer(arg2))
+            {
+              if (opc->v[3].i_ii_f == add_i_ii)
+                {
+                  opc->v[1].i = integer(arg1) + integer(arg2); /* no overflow check for sc_add case above */
+                  opc->v[0].fi = opt_i_c;
+                }
+              else
+                {
+                  opc->v[2].i = integer(arg2);
+                  opc->v[0].fi = (ifunc) ? opt_i_ii_cc : opt_i_7ii_cc;
+                }
+              return_true(sc, car_x);
+            }
+          p = opt_integer_symbol(sc, arg2);
+          if (p)
+            {
+              opc->v[2].p = p;
+              if (ifunc)
+                opc->v[0].fi = (opc->v[3].i_ii_f == multiply_i_ii) ? opt_i_ii_cs_mul : opt_i_ii_cs;
+              else opc->v[0].fi = opt_i_7ii_cs;
+              return_true(sc, car_x);
+            }
+          opc->v[4].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cddr(car_x)))
+            {
+              if (ifunc)
+                {
+                  opc->v[0].fi = opt_i_ii_cf;       /* sc->opts[start]->v[0].fi -> opt_i_7i_c -> same_opt->v[2].i_7i_f = random_i_7i tmap */
+                  if ((ifunc == add_i_ii) && (opc == sc->opts[sc->pc - 2]) &&
+                      (sc->opts[start]->v[0].fi == opt_i_7i_c) &&
+                      (sc->opts[start]->v[2].i_7i_f == random_i_7i))
+                    {
+                      opc->v[0].fi = opt_add_i_random_i;
+                      opc->v[2].i = sc->opts[start]->v[1].i;
+                      backup_pc(sc);
+                    }
+                  else if (ifunc == multiply_i_ii) opc->v[0].fi = opt_i_ii_cf_mul;
+                }
+              else opc->v[0].fi = opt_i_7ii_cf;
+              opc->v[5].fi = opc->v[4].o1->v[0].fi;
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+          return_false(sc, car_x);
+        }
 
       /* arg1 not integer */
       p = opt_integer_symbol(sc, arg1);
       if (p)
-	{
-	  opc->v[1].p = p;
-	  if (is_t_integer(arg2))
-	    {
-	      opc->v[2].i = integer(arg2);
-	      if (ifunc)
-		{
-		  if (opc->v[3].i_ii_f == add_i_ii)
-		    opc->v[0].fi = opt_i_ii_sc_add;
-		  else opc->v[0].fi = (opc->v[3].i_ii_f == subtract_i_ii) ? opt_i_ii_sc_sub : opt_i_ii_sc; /* add1/sub1 are not faster */
-		}
-	      else opc->v[0].fi = opt_i_7ii_sc;
-	      if ((car(car_x) == sc->modulo_symbol) &&
-		  (integer(arg2) > 1))
-		opc->v[3].i_ii_f = modulo_i_ii_unchecked;
-	      else
-		{
-		  if (car(car_x) == sc->ash_symbol)
-		    {
-		      if (opc->v[2].i < 0)
-			{
-			  opc->v[3].i_ii_f = (opc->v[2].i == -1) ? rsh_i_i2_direct : rsh_i_ii_unchecked;
-			  opc->v[0].fi = opt_i_ii_sc;
-			}
-		      else
-			if (opc->v[2].i < S7_INT_BITS)
-			  {
-			    opc->v[3].i_ii_f = lsh_i_ii_unchecked;
-			    opc->v[0].fi = opt_i_ii_sc;
-			  }}
-		  else
-		    if (opc->v[2].i > 0)
-		      {
-			/* these assume vunion is a union, not a struct; i_7ii_f otherwise might be leftover from a previous use */
-			if (opc->v[3].i_7ii_f == quotient_i_7ii)
-			  {
-			    opc->v[3].i_ii_f = quotient_i_ii_unchecked;
-			    opc->v[0].fi = opt_i_ii_sc;
-			  }
-			else
-			  if ((opc->v[2].i > 1) && (opc->v[3].i_7ii_f == remainder_i_7ii))
-			    {
-			      opc->v[3].i_ii_f = remainder_i_ii_unchecked;
-			      opc->v[0].fi = opt_i_ii_sc;
-			    }}}
-	      return_true(sc, car_x);
-	    }
-
-	  /* arg2 not integer, arg1 is int symbol */
-	  p = opt_integer_symbol(sc, arg2);
-	  if (p)
-	    {
-	      opc->v[2].p = p;
-	      if (ifunc)
-		opc->v[0].fi = (opc->v[3].i_ii_f == add_i_ii) ? opt_i_ii_ss_add : opt_i_ii_ss;
-	      else opc->v[0].fi = opt_i_7ii_ss;
-	      return_true(sc, car_x);
-	    }
-	  if (int_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[4].o1 = sc->opts[start];
-	      opc->v[5].fi = sc->opts[start]->v[0].fi;
-	      if (ifunc)
-		opc->v[0].fi = (opc->v[3].i_ii_f == add_i_ii) ? opt_i_ii_sf_add : opt_i_ii_sf;
-	      else opc->v[0].fi = opt_i_7ii_sf;
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	  return_false(sc, car_x);
-	}
+        {
+          opc->v[1].p = p;
+          if (is_t_integer(arg2))
+            {
+              opc->v[2].i = integer(arg2);
+              if (ifunc)
+                {
+                  if (opc->v[3].i_ii_f == add_i_ii)
+                    opc->v[0].fi = opt_i_ii_sc_add;
+                  else opc->v[0].fi = (opc->v[3].i_ii_f == subtract_i_ii) ? opt_i_ii_sc_sub : opt_i_ii_sc; /* add1/sub1 are not faster */
+                }
+              else opc->v[0].fi = opt_i_7ii_sc;
+              if ((car(car_x) == sc->modulo_symbol) &&
+                  (integer(arg2) > 1))
+                opc->v[3].i_ii_f = modulo_i_ii_unchecked;
+              else
+                {
+                  if (car(car_x) == sc->ash_symbol)
+                    {
+                      if (opc->v[2].i < 0)
+                        {
+                          opc->v[3].i_ii_f = (opc->v[2].i == -1) ? rsh_i_i2_direct : rsh_i_ii_unchecked;
+                          opc->v[0].fi = opt_i_ii_sc;
+                        }
+                      else
+                        if (opc->v[2].i < S7_INT_BITS)
+                          {
+                            opc->v[3].i_ii_f = lsh_i_ii_unchecked;
+                            opc->v[0].fi = opt_i_ii_sc;
+                          }}
+                  else
+                    if (opc->v[2].i > 0)
+                      {
+                        /* these assume vunion is a union, not a struct; i_7ii_f otherwise might be leftover from a previous use */
+                        if (opc->v[3].i_7ii_f == quotient_i_7ii)
+                          {
+                            opc->v[3].i_ii_f = quotient_i_ii_unchecked;
+                            opc->v[0].fi = opt_i_ii_sc;
+                          }
+                        else
+                          if ((opc->v[2].i > 1) && (opc->v[3].i_7ii_f == remainder_i_7ii))
+                            {
+                              opc->v[3].i_ii_f = remainder_i_ii_unchecked;
+                              opc->v[0].fi = opt_i_ii_sc;
+                            }}}
+              return_true(sc, car_x);
+            }
+
+          /* arg2 not integer, arg1 is int symbol */
+          p = opt_integer_symbol(sc, arg2);
+          if (p)
+            {
+              opc->v[2].p = p;
+              if (ifunc)
+                opc->v[0].fi = (opc->v[3].i_ii_f == add_i_ii) ? opt_i_ii_ss_add : opt_i_ii_ss;
+              else opc->v[0].fi = opt_i_7ii_ss;
+              return_true(sc, car_x);
+            }
+          if (int_optimize(sc, cddr(car_x)))
+            {
+              opc->v[4].o1 = sc->opts[start];
+              opc->v[5].fi = sc->opts[start]->v[0].fi;
+              if (ifunc)
+                opc->v[0].fi = (opc->v[3].i_ii_f == add_i_ii) ? opt_i_ii_sf_add : opt_i_ii_sf;
+              else opc->v[0].fi = opt_i_7ii_sf;
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+          return_false(sc, car_x);
+        }
 
       /* arg1 not int symbol */
       if (is_t_integer(arg2))
-	{
-	  opc->v[2].i = integer(arg2);
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdr(car_x)))
-	    {
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      if (!i_ii_fc_combinable(sc, opc, ifunc))
-		{
-		  if (ifunc)
-		    {
-		      if (opc->v[3].i_ii_f == add_i_ii) {opc->v[0].fi = opt_i_ii_fc_add; return_true(sc, car_x);}
-		      if (opc->v[3].i_ii_f == multiply_i_ii) {opc->v[0].fi = opt_i_ii_fc_mul; return_true(sc, car_x);}
-		      opc->v[0].fi = opt_i_ii_fc;
-
-		      if ((opc->v[3].i_ii_f == subtract_i_ii) && (opc == sc->opts[sc->pc - 2]) &&
-			  (sc->opts[start]->v[0].fi == opt_i_7i_c) &&
-			  (sc->opts[start]->v[2].i_7i_f == random_i_7i))
-			{
-			  opc->v[0].fi = opt_subtract_random_i_i;
-			  opc->v[1].i = sc->opts[start]->v[1].i;
-			  backup_pc(sc);
-			}}
-		  else opc->v[0].fi = opt_i_7ii_fc;
-		  if (opc->v[2].i > 0)
-		    {
-		      if (opc->v[3].i_7ii_f == quotient_i_7ii)
-			{
-			  opc->v[3].i_ii_f = quotient_i_ii_unchecked;
-			  opc->v[0].fi = opt_i_ii_fc;
-			}
-		      else
-			if ((opc->v[2].i > 1) && (opc->v[3].i_7ii_f == remainder_i_7ii))
-			  {
-			    opc->v[3].i_ii_f = remainder_i_ii_unchecked;
-			    opc->v[0].fi = opt_i_ii_fc;
-			  }}}
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	  return_false(sc, car_x);
-	}
+        {
+          opc->v[2].i = integer(arg2);
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cdr(car_x)))
+            {
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              if (!i_ii_fc_combinable(sc, opc, ifunc))
+                {
+                  if (ifunc)
+                    {
+                      if (opc->v[3].i_ii_f == add_i_ii) {opc->v[0].fi = opt_i_ii_fc_add; return_true(sc, car_x);}
+                      if (opc->v[3].i_ii_f == multiply_i_ii) {opc->v[0].fi = opt_i_ii_fc_mul; return_true(sc, car_x);}
+                      opc->v[0].fi = opt_i_ii_fc;
+
+                      if ((opc->v[3].i_ii_f == subtract_i_ii) && (opc == sc->opts[sc->pc - 2]) &&
+                          (sc->opts[start]->v[0].fi == opt_i_7i_c) &&
+                          (sc->opts[start]->v[2].i_7i_f == random_i_7i))
+                        {
+                          opc->v[0].fi = opt_subtract_random_i_i;
+                          opc->v[1].i = sc->opts[start]->v[1].i;
+                          backup_pc(sc);
+                        }}
+                  else opc->v[0].fi = opt_i_7ii_fc;
+                  if (opc->v[2].i > 0)
+                    {
+                      if (opc->v[3].i_7ii_f == quotient_i_7ii)
+                        {
+                          opc->v[3].i_ii_f = quotient_i_ii_unchecked;
+                          opc->v[0].fi = opt_i_ii_fc;
+                        }
+                      else
+                        if ((opc->v[2].i > 1) && (opc->v[3].i_7ii_f == remainder_i_7ii))
+                          {
+                            opc->v[3].i_ii_f = remainder_i_ii_unchecked;
+                            opc->v[0].fi = opt_i_ii_fc;
+                          }}}
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+          return_false(sc, car_x);
+        }
 
       /* arg1 not integer or symbol, arg2 not integer */
       opc->v[10].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	  opc->v[8].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[9].fi = opc->v[8].o1->v[0].fi;
-	      opc->v[0].fi = (ifunc) ? opt_i_ii_ff : ((opc->v[3].i_7ii_f == quotient_i_7ii) ? opt_i_7ii_ff_quo : opt_i_7ii_ff);
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	}}
+        {
+          opc->v[11].fi = opc->v[10].o1->v[0].fi;
+          opc->v[8].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cddr(car_x)))
+            {
+              opc->v[9].fi = opc->v[8].o1->v[0].fi;
+              opc->v[0].fi = (ifunc) ? opt_i_ii_ff : ((opc->v[3].i_7ii_f == quotient_i_7ii) ? opt_i_7ii_ff_quo : opt_i_7ii_ff);
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+        }}
   return_false(sc, car_x);
 }
 
@@ -59602,17 +59602,17 @@ static bool i_iii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opc->v[8].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[4].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdddr(car_x)))
-	    {
-	      opc->v[3].i_iii_f = ifunc;
-	      opc->v[0].fi = opt_i_iii_fff;
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      opc->v[9].fi = opc->v[8].o1->v[0].fi;
-	      opc->v[5].fi = opc->v[4].o1->v[0].fi;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opc->v[4].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cdddr(car_x)))
+            {
+              opc->v[3].i_iii_f = ifunc;
+              opc->v[0].fi = opt_i_iii_fff;
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              opc->v[9].fi = opc->v[8].o1->v[0].fi;
+              opc->v[5].fi = opc->v[4].o1->v[0].fi;
+              return_true(sc, car_x);
+            }}}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -59678,32 +59678,32 @@ static bool opt_i_7piii_args(s7_scheme *sc, opt_info *opc, s7_pointer indexp1, s
       opc->v[3].p = slot;
       slot = opt_integer_symbol(sc, car(indexp1));
       if (slot)
-	{
-	  opc->v[2].p = slot;
-	  if (is_t_integer(car(valp)))
-	    {
-	      opc->v[0].fi = opt_i_7piii_sssc;
-	      opc->v[4].i = integer(car(valp));
-	      return_true(sc, NULL);
-	    }
-	  slot = opt_integer_symbol(sc, car(valp));
-	  if (slot)
-	    {
-	      opc->v[4].p = slot;
-	      opc->v[0].fi = opt_i_7piii_ssss;
-	      return_true(sc, NULL);
-	    }
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, valp))
-	    {
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      opc->v[0].fi = opt_i_7piii_sssf;
-	      if ((opc->v[5].i_7piii_f == int_vector_set_i_7piii) &&
-		  (loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
-		  (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
-		opc->v[0].fi = opt_i_piii_sssf_ivset_unchecked;
-	      return_true(sc, NULL);
-	    }}
+        {
+          opc->v[2].p = slot;
+          if (is_t_integer(car(valp)))
+            {
+              opc->v[0].fi = opt_i_7piii_sssc;
+              opc->v[4].i = integer(car(valp));
+              return_true(sc, NULL);
+            }
+          slot = opt_integer_symbol(sc, car(valp));
+          if (slot)
+            {
+              opc->v[4].p = slot;
+              opc->v[0].fi = opt_i_7piii_ssss;
+              return_true(sc, NULL);
+            }
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, valp))
+            {
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              opc->v[0].fi = opt_i_7piii_sssf;
+              if ((opc->v[5].i_7piii_f == int_vector_set_i_7piii) &&
+                  (loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
+                  (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
+                opc->v[0].fi = opt_i_piii_sssf_ivset_unchecked;
+              return_true(sc, NULL);
+            }}
       return_false(sc, NULL);
     }
   opc->v[10].o1 = sc->opts[sc->pc];
@@ -59711,16 +59711,16 @@ static bool opt_i_7piii_args(s7_scheme *sc, opt_info *opc, s7_pointer indexp1, s
     {
       opc->v[8].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, indexp2))
-	{
-	  opc->v[4].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, valp))
-	    {
-	      opc->v[0].fi = opt_i_7piii_sfff;
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      opc->v[9].fi = opc->v[8].o1->v[0].fi;
-	      opc->v[6].fi = opc->v[4].o1->v[0].fi; /* v[5] is in use */
-	      return_true(sc, NULL);
-	    }}}
+        {
+          opc->v[4].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, valp))
+            {
+              opc->v[0].fi = opt_i_7piii_sfff;
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              opc->v[9].fi = opc->v[8].o1->v[0].fi;
+              opc->v[6].fi = opc->v[4].o1->v[0].fi; /* v[5] is in use */
+              return_true(sc, NULL);
+            }}}
   return_false(sc, indexp1);
 }
 
@@ -59734,59 +59734,59 @@ static bool opt_int_vector_set(s7_scheme *sc, int32_t otype, opt_info *opc, s7_p
       bool int_case = (is_int_vector(vect));
       opc->v[1].p = settee;
       if ((int_case) || (is_byte_vector(vect)))
-	{
-	  if ((otype >= 0) && (otype != ((int_case) ? 1 : 0)))
-	    return_false(sc, indexp1);
-	  if ((!indexp2) &&
-	      (vector_rank(vect) == 1))
-	    {
-	      opc->v[3].i_7pii_f = (int_case) ? int_vector_set_i_7pii : byte_vector_set_i_7pii;
-	      slot = opt_integer_symbol(sc, car(indexp1));
-	      if (slot)
-		{
-		  int32_t start = sc->pc;
-		  opc->v[2].p = slot;
-		  if (loop_end_fits(opc->v[2].p, vector_length(vect)))
-		    opc->v[3].i_7pii_f = (int_case) ? int_vector_set_i_7pii_direct : byte_vector_set_i_7pii_direct;
-		  if ((is_pair(valp)) &&
-		      (is_null(cdr(valp))) &&
-		      (is_t_integer(car(valp))))
-		    {
-		      opc->v[4].i = integer(car(valp));
-		      opc->v[0].fi = opt_i_7pii_ssc;
-		      return_true(sc, NULL);
-		    }
-		  if (!int_optimize(sc, valp))
-		    return_false(sc, NULL);
-		  opc->v[0].fi = (opc->v[3].i_7pii_f == int_vector_set_i_7pii_direct) ? opt_i_7pii_ssf_vset : opt_i_7pii_ssf;
-		  opc->v[4].o1 = sc->opts[start];
-		  opc->v[5].fi = sc->opts[start]->v[0].fi;
-		  return_true(sc, NULL);
-		}
-	      opc->v[10].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, indexp1))
-		{
-		  opc->v[8].o1 = sc->opts[sc->pc];
-		  if (int_optimize(sc, valp))
-		    {
-		      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		      opc->v[9].fi = opc->v[8].o1->v[0].fi;
-		      if (opc->v[11].fi == opt_i_c) /* (int-vector-set! v 0 (floor (sqrt i))) */
-			{
-			  opc->v[0].fi = opt_i_7pii_sif;
-			  opc->v[12].i = opc->v[10].o1->v[1].i;
-			}
-		      else opc->v[0].fi = opt_i_7pii_sff;
-		      return_true(sc, NULL);
-		    }}
-	      return_false(sc, NULL);
-	    }
-	  if ((indexp2) &&
-	      (vector_rank(vect) == 2))
-	    {
-	      opc->v[5].i_7piii_f = (int_case) ? int_vector_set_i_7piii : byte_vector_set_i_7piii;
-	      return(opt_i_7piii_args(sc, opc, indexp1, indexp2, valp));
-	    }}}
+        {
+          if ((otype >= 0) && (otype != ((int_case) ? 1 : 0)))
+            return_false(sc, indexp1);
+          if ((!indexp2) &&
+              (vector_rank(vect) == 1))
+            {
+              opc->v[3].i_7pii_f = (int_case) ? int_vector_set_i_7pii : byte_vector_set_i_7pii;
+              slot = opt_integer_symbol(sc, car(indexp1));
+              if (slot)
+                {
+                  int32_t start = sc->pc;
+                  opc->v[2].p = slot;
+                  if (loop_end_fits(opc->v[2].p, vector_length(vect)))
+                    opc->v[3].i_7pii_f = (int_case) ? int_vector_set_i_7pii_direct : byte_vector_set_i_7pii_direct;
+                  if ((is_pair(valp)) &&
+                      (is_null(cdr(valp))) &&
+                      (is_t_integer(car(valp))))
+                    {
+                      opc->v[4].i = integer(car(valp));
+                      opc->v[0].fi = opt_i_7pii_ssc;
+                      return_true(sc, NULL);
+                    }
+                  if (!int_optimize(sc, valp))
+                    return_false(sc, NULL);
+                  opc->v[0].fi = (opc->v[3].i_7pii_f == int_vector_set_i_7pii_direct) ? opt_i_7pii_ssf_vset : opt_i_7pii_ssf;
+                  opc->v[4].o1 = sc->opts[start];
+                  opc->v[5].fi = sc->opts[start]->v[0].fi;
+                  return_true(sc, NULL);
+                }
+              opc->v[10].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, indexp1))
+                {
+                  opc->v[8].o1 = sc->opts[sc->pc];
+                  if (int_optimize(sc, valp))
+                    {
+                      opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                      opc->v[9].fi = opc->v[8].o1->v[0].fi;
+                      if (opc->v[11].fi == opt_i_c) /* (int-vector-set! v 0 (floor (sqrt i))) */
+                        {
+                          opc->v[0].fi = opt_i_7pii_sif;
+                          opc->v[12].i = opc->v[10].o1->v[1].i;
+                        }
+                      else opc->v[0].fi = opt_i_7pii_sff;
+                      return_true(sc, NULL);
+                    }}
+              return_false(sc, NULL);
+            }
+          if ((indexp2) &&
+              (vector_rank(vect) == 2))
+            {
+              opc->v[5].i_7piii_f = (int_case) ? int_vector_set_i_7piii : byte_vector_set_i_7piii;
+              return(opt_i_7piii_args(sc, opc, indexp1, indexp2, valp));
+            }}}
   return_false(sc, v);
 }
 
@@ -59808,62 +59808,62 @@ static bool i_7pii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointe
       s7_pointer slot, fname = car(car_x);
 
       if ((is_target_or_its_alias(fname, s_func, sc->int_vector_set_symbol)) ||
-	  (is_target_or_its_alias(fname, s_func, sc->byte_vector_set_symbol)))
-	return(opt_int_vector_set(sc, (fname == sc->int_vector_set_symbol) ? 1 : 0, opc, cadr(car_x), cddr(car_x), NULL, cdddr(car_x)));
+          (is_target_or_its_alias(fname, s_func, sc->byte_vector_set_symbol)))
+        return(opt_int_vector_set(sc, (fname == sc->int_vector_set_symbol) ? 1 : 0, opc, cadr(car_x), cddr(car_x), NULL, cdddr(car_x)));
 
       slot = opt_types_match(sc, cadr(sig), cadr(car_x));
       if (slot)
-	{
-	  s7_pointer arg2, p;
-	  int32_t start = sc->pc;
-	  opc->v[1].p = slot;
-
-	  if (((is_target_or_its_alias(fname, s_func, sc->int_vector_ref_symbol)) ||
-	       (is_target_or_its_alias(fname, s_func, sc->byte_vector_ref_symbol))) &&
-	      (vector_rank(slot_value(slot)) != 2))
-	    return_false(sc, car_x);
-
-	  arg2 = caddr(car_x);
-	  p = opt_integer_symbol(sc, arg2);
-	  if (p)
-	    {
-	      opc->v[2].p = p;
-	      p = opt_integer_symbol(sc, cadddr(car_x));
-	      if (p)
-		{
-		  opc->v[3].p = p;
-		  opc->v[4].i_7pii_f = pfunc;
-		  opc->v[0].fi = opt_i_7pii_sss;
-		  if ((pfunc == int_vector_ref_i_7pii) &&
-		      (loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
-		      (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
-		    opc->v[0].fi = opt_i_pii_sss_ivref_unchecked;
-		  return_true(sc, car_x);
-		}
-	      if (int_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[3].i_7pii_f = pfunc;
-		  opc->v[0].fi = opt_i_7pii_ssf;
-		  opc->v[4].o1 = sc->opts[start];
-		  opc->v[5].fi = sc->opts[start]->v[0].fi;
-		  return_true(sc, car_x);
-		}
-	      return_false(sc, car_x);
-	    }
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[3].i_7pii_f = pfunc;
-		  opc->v[0].fi = opt_i_7pii_sff;
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[9].fi = opc->v[8].o1->v[0].fi;
-		  return_true(sc, car_x);
-		}}
-	  sc->pc = start;
-	}}
+        {
+          s7_pointer arg2, p;
+          int32_t start = sc->pc;
+          opc->v[1].p = slot;
+
+          if (((is_target_or_its_alias(fname, s_func, sc->int_vector_ref_symbol)) ||
+               (is_target_or_its_alias(fname, s_func, sc->byte_vector_ref_symbol))) &&
+              (vector_rank(slot_value(slot)) != 2))
+            return_false(sc, car_x);
+
+          arg2 = caddr(car_x);
+          p = opt_integer_symbol(sc, arg2);
+          if (p)
+            {
+              opc->v[2].p = p;
+              p = opt_integer_symbol(sc, cadddr(car_x));
+              if (p)
+                {
+                  opc->v[3].p = p;
+                  opc->v[4].i_7pii_f = pfunc;
+                  opc->v[0].fi = opt_i_7pii_sss;
+                  if ((pfunc == int_vector_ref_i_7pii) &&
+                      (loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
+                      (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
+                    opc->v[0].fi = opt_i_pii_sss_ivref_unchecked;
+                  return_true(sc, car_x);
+                }
+              if (int_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[3].i_7pii_f = pfunc;
+                  opc->v[0].fi = opt_i_7pii_ssf;
+                  opc->v[4].o1 = sc->opts[start];
+                  opc->v[5].fi = sc->opts[start]->v[0].fi;
+                  return_true(sc, car_x);
+                }
+              return_false(sc, car_x);
+            }
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cddr(car_x)))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[3].i_7pii_f = pfunc;
+                  opc->v[0].fi = opt_i_7pii_sff;
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[9].fi = opc->v[8].o1->v[0].fi;
+                  return_true(sc, car_x);
+                }}
+          sc->pc = start;
+        }}
   return_false(sc, car_x);
 }
 
@@ -59875,19 +59875,19 @@ static bool i_7piii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_point
     {
       s7_pointer settee;
       if ((is_target_or_its_alias(car(car_x), s_func, sc->int_vector_set_symbol)) ||
-	  (is_target_or_its_alias(car(car_x), s_func, sc->byte_vector_set_symbol)))
-	return(opt_int_vector_set(sc, (car(car_x) == sc->int_vector_set_symbol) ? 1 : 0, opc, cadr(car_x), cddr(car_x), cdddr(car_x), cddddr(car_x)));
+          (is_target_or_its_alias(car(car_x), s_func, sc->byte_vector_set_symbol)))
+        return(opt_int_vector_set(sc, (car(car_x) == sc->int_vector_set_symbol) ? 1 : 0, opc, cadr(car_x), cddr(car_x), cdddr(car_x), cddddr(car_x)));
 
       settee = s7_slot(sc, cadr(car_x));
       if (is_slot(settee))
-	{
-	  s7_pointer vect = slot_value(settee);
-	  if ((is_int_vector(vect)) && (vector_rank(vect) == 3))
-	    {
-	      opc->v[5].i_7piii_f = f;
-	      opc->v[1].p = settee;
-	      return(opt_i_7piii_args(sc, opc, cddr(car_x), cdddr(car_x), cddddr(car_x)));
-	    }}}
+        {
+          s7_pointer vect = slot_value(settee);
+          if ((is_int_vector(vect)) && (vector_rank(vect) == 3))
+            {
+              opc->v[5].i_7piii_f = f;
+              opc->v[1].p = settee;
+              return(opt_i_7piii_args(sc, opc, cddr(car_x), cdddr(car_x), cddddr(car_x)));
+            }}}
   return_false(sc, car_x);
 }
 
@@ -59964,23 +59964,23 @@ static bool i_add_any_ok(s7_scheme *sc, opt_info *opc, s7_pointer car_x)
     {
       opc->v[cur_len + 2].o1 = sc->opts[sc->pc];
       if (!int_optimize(sc, p))
-	break;
+        break;
     }
   if (is_null(p))
     {
       opc->v[1].i = cur_len;
       if (cur_len <= 4)
-	for (int32_t i = 0; i < cur_len; i++)
-	  opc->v[i + 6].fi = opc->v[i + 2].o1->v[0].fi;
+        for (int32_t i = 0; i < cur_len; i++)
+          opc->v[i + 6].fi = opc->v[i + 2].o1->v[0].fi;
       if (cur_len == 2)
-	opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add2 : opt_i_mul2;
+        opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add2 : opt_i_mul2;
       else
-	if (cur_len == 3)
-	  opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add3 : opt_i_mul3;
-	else
-	  if (cur_len == 4)
-	    opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add4 : opt_i_mul4;
-	  else opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add_any_f : opt_i_multiply_any_f;
+        if (cur_len == 3)
+          opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add3 : opt_i_mul3;
+        else
+          if (cur_len == 4)
+            opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add4 : opt_i_mul4;
+          else opc->v[0].fi = (head == sc->add_symbol) ? opt_i_add_any_f : opt_i_multiply_any_f;
       return_true(sc, car_x);
     }
   sc->pc = start;
@@ -60039,14 +60039,14 @@ static bool set_i_i_f_combinable(s7_scheme *sc, opt_info *opc)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if (o1->v[0].fi == opt_i_ii_sc_add)
-	{
-	  /* opc->v[4].i_ii_f = o1->v[3].i_ii_f; */
-	  opc->v[3].p = o1->v[1].p;
-	  opc->v[2].i = o1->v[2].i;
-	  opc->v[0].fi = opt_set_i_i_fo;
-	  backup_pc(sc);
-	  return_true(sc, NULL); /* ii_sc v[1].p is a slot */
-	}}
+        {
+          /* opc->v[4].i_ii_f = o1->v[3].i_ii_f; */
+          opc->v[3].p = o1->v[1].p;
+          opc->v[2].i = o1->v[2].i;
+          opc->v[0].fi = opt_set_i_i_fo;
+          backup_pc(sc);
+          return_true(sc, NULL); /* ii_sc v[1].p is a slot */
+        }}
   return_false(sc, NULL);
 }
 
@@ -60058,42 +60058,42 @@ static bool i_syntax_ok(s7_scheme *sc, s7_pointer car_x, int32_t len)
       s7_pointer arg1 = cadr(car_x);
       opt_info *opc = alloc_opt_info(sc);
       if (is_symbol(arg1))  /* (set! i 3) */
-	{
-	  s7_pointer settee;
-	  if (is_immutable(arg1))
-	    return_false(sc, car_x);
-	  settee = s7_slot(sc, arg1);
-	  if ((is_slot(settee)) &&
-	      (is_t_integer(slot_value(settee))) &&
-	      (!is_immutable_slot(settee)) &&
-	      ((!slot_has_setter(settee)) ||
-	       ((is_c_function(slot_setter(settee))) &&
-		((slot_setter(settee) == initial_value(sc->is_integer_symbol)) ||
-		 (c_function_call(slot_setter(settee)) == b_is_integer_setter)))))
-	    /* opt set! won't change type, and it is an integer now (and we might not hit opt_cell_set) */
-	    {
-	      opt_info *o1 = sc->opts[sc->pc];
-	      opc->v[1].p = settee;
-	      if (int_optimize(sc, cddr(car_x)))
-		{
-		  if (set_i_i_f_combinable(sc, opc))
-		    return_true(sc, car_x);
-		  opc->v[0].fi = (is_mutable_integer(slot_value(opc->v[1].p))) ? opt_set_i_i_fm : opt_set_i_i_f;
-		  /* only a few opt_set_i_i_f|fo's remain in valcall suite */
-		  opc->v[2].o1 = o1;
-		  opc->v[3].fi = o1->v[0].fi;
-		  return_true(sc, car_x);
-		}}}
+        {
+          s7_pointer settee;
+          if (is_immutable(arg1))
+            return_false(sc, car_x);
+          settee = s7_slot(sc, arg1);
+          if ((is_slot(settee)) &&
+              (is_t_integer(slot_value(settee))) &&
+              (!is_immutable_slot(settee)) &&
+              ((!slot_has_setter(settee)) ||
+               ((is_c_function(slot_setter(settee))) &&
+                ((slot_setter(settee) == initial_value(sc->is_integer_symbol)) ||
+                 (c_function_call(slot_setter(settee)) == b_is_integer_setter)))))
+            /* opt set! won't change type, and it is an integer now (and we might not hit opt_cell_set) */
+            {
+              opt_info *o1 = sc->opts[sc->pc];
+              opc->v[1].p = settee;
+              if (int_optimize(sc, cddr(car_x)))
+                {
+                  if (set_i_i_f_combinable(sc, opc))
+                    return_true(sc, car_x);
+                  opc->v[0].fi = (is_mutable_integer(slot_value(opc->v[1].p))) ? opt_set_i_i_fm : opt_set_i_i_f;
+                  /* only a few opt_set_i_i_f|fo's remain in valcall suite */
+                  opc->v[2].o1 = o1;
+                  opc->v[3].fi = o1->v[0].fi;
+                  return_true(sc, car_x);
+                }}}
       else
-	if ((is_pair(arg1)) &&    /* if is_pair(settee) get setter */
-	    (is_symbol(car(arg1))) &&
-	    (is_pair(cdr(arg1))))
-	  {
-	    if (is_null(cddr(arg1)))
-	      return(opt_int_vector_set(sc, -1, opc, car(arg1), cdr(arg1), NULL, cddr(car_x)));
-	    if (is_null(cdddr(arg1)))
-	      return(opt_int_vector_set(sc, -1, opc, car(arg1), cdr(arg1), cddr(arg1), cddr(car_x)));
-	  }}
+        if ((is_pair(arg1)) &&    /* if is_pair(settee) get setter */
+            (is_symbol(car(arg1))) &&
+            (is_pair(cdr(arg1))))
+          {
+            if (is_null(cddr(arg1)))
+              return(opt_int_vector_set(sc, -1, opc, car(arg1), cdr(arg1), NULL, cddr(car_x)));
+            if (is_null(cdddr(arg1)))
+              return(opt_int_vector_set(sc, -1, opc, car(arg1), cdr(arg1), cddr(arg1), cddr(car_x)));
+          }}
   return_false(sc, car_x);
 }
 
@@ -60106,62 +60106,62 @@ static bool i_implicit_ok(s7_scheme *sc, s7_pointer s_slot, s7_pointer car_x, in
       s7_pointer slot;
 
       if ((len == 2) &&
-	  (vector_rank(obj) == 1))
-	{
-	  opt_info *opc = alloc_opt_info(sc);
-	  opc->v[1].p = s_slot;
-	  slot = opt_integer_symbol(sc, cadr(car_x));
-	  if (slot)
-	    {
-	      opc->v[0].fi = opt_i_7pi_ss;
-	      opc->v[3].i_7pi_f = (int_case) ? int_vector_ref_i_7pi : byte_vector_ref_i_7pi;
-	      opc->v[2].p = slot;
-	      if (loop_end_fits(opc->v[2].p, vector_length(obj)))
-		opc->v[3].i_7pi_f = (int_case) ? int_vector_ref_i_pi_direct : byte_vector_ref_i_7pi_direct;
-		  /* not opc->v[0].fi = opt_i_pi_ss_ivref -- this causes a huge slowdown in dup.scm?? */
-	      return_true(sc, car_x);
-	    }
-	  opc->v[4].o1 = sc->opts[sc->pc];
-	  if (!int_optimize(sc, cdr(car_x)))
-	    return_false(sc, car_x);
-	  opc->v[0].fi = opt_i_7pi_sf;
-	  opc->v[3].i_7pi_f = (int_case) ? int_vector_ref_i_7pi : byte_vector_ref_i_7pi;
-	  opc->v[5].fi = opc->v[4].o1->v[0].fi;
-	  return_true(sc, car_x);
-	}
+          (vector_rank(obj) == 1))
+        {
+          opt_info *opc = alloc_opt_info(sc);
+          opc->v[1].p = s_slot;
+          slot = opt_integer_symbol(sc, cadr(car_x));
+          if (slot)
+            {
+              opc->v[0].fi = opt_i_7pi_ss;
+              opc->v[3].i_7pi_f = (int_case) ? int_vector_ref_i_7pi : byte_vector_ref_i_7pi;
+              opc->v[2].p = slot;
+              if (loop_end_fits(opc->v[2].p, vector_length(obj)))
+                opc->v[3].i_7pi_f = (int_case) ? int_vector_ref_i_pi_direct : byte_vector_ref_i_7pi_direct;
+                  /* not opc->v[0].fi = opt_i_pi_ss_ivref -- this causes a huge slowdown in dup.scm?? */
+              return_true(sc, car_x);
+            }
+          opc->v[4].o1 = sc->opts[sc->pc];
+          if (!int_optimize(sc, cdr(car_x)))
+            return_false(sc, car_x);
+          opc->v[0].fi = opt_i_7pi_sf;
+          opc->v[3].i_7pi_f = (int_case) ? int_vector_ref_i_7pi : byte_vector_ref_i_7pi;
+          opc->v[5].fi = opc->v[4].o1->v[0].fi;
+          return_true(sc, car_x);
+        }
       if ((len == 3) &&
-	  (vector_rank(obj) == 2))
-	{
-	  opt_info *opc = alloc_opt_info(sc);
-	  opc->v[1].p = s_slot;
-	  slot = opt_integer_symbol(sc, cadr(car_x));
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      slot = opt_integer_symbol(sc, caddr(car_x));
-	      if (!slot)
-		return_false(sc, car_x);
-	      opc->v[4].i_7pii_f = (int_case) ? int_vector_ref_i_7pii : byte_vector_ref_i_7pii;
-	      opc->v[3].p = slot;
-	      opc->v[0].fi = opt_i_7pii_sss;
-	      if ((int_case) &&
-		  (loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
-		  (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
-		opc->v[0].fi = opt_i_pii_sss_ivref_unchecked;
-	      return_true(sc, car_x);
-	    }
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdr(car_x)))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[3].i_7pii_f = (int_case) ? int_vector_ref_i_7pii : byte_vector_ref_i_7pii;
-		  opc->v[0].fi = opt_i_7pii_sff;
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[9].fi = opc->v[8].o1->v[0].fi;
-		  return_true(sc, car_x);
-		}}}}
+          (vector_rank(obj) == 2))
+        {
+          opt_info *opc = alloc_opt_info(sc);
+          opc->v[1].p = s_slot;
+          slot = opt_integer_symbol(sc, cadr(car_x));
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              slot = opt_integer_symbol(sc, caddr(car_x));
+              if (!slot)
+                return_false(sc, car_x);
+              opc->v[4].i_7pii_f = (int_case) ? int_vector_ref_i_7pii : byte_vector_ref_i_7pii;
+              opc->v[3].p = slot;
+              opc->v[0].fi = opt_i_7pii_sss;
+              if ((int_case) &&
+                  (loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
+                  (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
+                opc->v[0].fi = opt_i_pii_sss_ivref_unchecked;
+              return_true(sc, car_x);
+            }
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cdr(car_x)))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[3].i_7pii_f = (int_case) ? int_vector_ref_i_7pii : byte_vector_ref_i_7pii;
+                  opc->v[0].fi = opt_i_7pii_sff;
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[9].fi = opc->v[8].o1->v[0].fi;
+                  return_true(sc, car_x);
+                }}}}
   return_false(sc, car_x);
 }
 
@@ -60240,38 +60240,38 @@ static bool d_d_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer c
     {
       s7_pointer p, arg1 = cadr(car_x);
       if (func)
-	opc->v[3].d_d_f = func;
+        opc->v[3].d_d_f = func;
       else opc->v[3].d_7d_f = func7;
       if (is_small_real(arg1))
-	{
-	  if ((!is_t_real(arg1)) &&                          /* (random 1) != (random 1.0) */
-	      ((car(car_x) == sc->random_symbol) ||
-	       (car(car_x) == sc->sin_symbol) || (car(car_x) == sc->cos_symbol)))
-	    return_false(sc, car_x);
-	  opc->v[1].x = s7_number_to_real(sc, arg1);
-	  opc->v[0].fd = (func) ? opt_d_d_c : opt_d_7d_c;
-	  return_true(sc, car_x);
-	}
+        {
+          if ((!is_t_real(arg1)) &&                          /* (random 1) != (random 1.0) */
+              ((car(car_x) == sc->random_symbol) ||
+               (car(car_x) == sc->sin_symbol) || (car(car_x) == sc->cos_symbol)))
+            return_false(sc, car_x);
+          opc->v[1].x = s7_number_to_real(sc, arg1);
+          opc->v[0].fd = (func) ? opt_d_d_c : opt_d_7d_c;
+          return_true(sc, car_x);
+        }
       p = opt_float_symbol(sc, arg1);
       if ((p) &&
-	  (!has_methods(slot_value(p))))
-	{
-	  opc->v[1].p = p;
-	  opc->v[0].fd = (func) ? ((func == abs_d_d) ? opt_d_d_s_abs : opt_d_d_s) : opt_d_7d_s;
-	  return_true(sc, car_x);
-	}
+          (!has_methods(slot_value(p))))
+        {
+          opc->v[1].p = p;
+          opc->v[0].fd = (func) ? ((func == abs_d_d) ? opt_d_d_s_abs : opt_d_d_s) : opt_d_7d_s;
+          return_true(sc, car_x);
+        }
       opc->v[4].o1 = sc->opts[sc->pc];
       if (float_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[0].fd = (func) ? ((func == abs_d_d) ? opt_d_d_f_abs : ((func == sin_d_d) ? opt_d_d_f_sin :
-				    ((func == cos_d_d) ? opt_d_d_f_cos : opt_d_d_f))) :
-	                          ((func7 == divide_d_7d) ? opt_d_7d_f_divide : opt_d_7d_f);
-	  /* if (opc->v[0].fd == opt_d_7d_f_divide) in tnum we know the arg is not 0.0, so it could be further optimized (but it's the loop stepper) */
-	  opc->v[5].fd = opc->v[4].o1->v[0].fd;
-	  if ((func == abs_d_d) && (opc->v[5].fd == opt_d_7pi_ss_fvref_direct))
-	    opc->v[0].fd = opt_abs_d_ss_fvref;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fd = (func) ? ((func == abs_d_d) ? opt_d_d_f_abs : ((func == sin_d_d) ? opt_d_d_f_sin :
+                                    ((func == cos_d_d) ? opt_d_d_f_cos : opt_d_d_f))) :
+                                  ((func7 == divide_d_7d) ? opt_d_7d_f_divide : opt_d_7d_f);
+          /* if (opc->v[0].fd == opt_d_7d_f_divide) in tnum we know the arg is not 0.0, so it could be further optimized (but it's the loop stepper) */
+          opc->v[5].fd = opc->v[4].o1->v[0].fd;
+          if ((func == abs_d_d) && (opc->v[5].fd == opt_d_7pi_ss_fvref_direct))
+            opc->v[0].fd = opt_abs_d_ss_fvref;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
     }
   return_false(sc, car_x);
@@ -60293,13 +60293,13 @@ static bool d_v_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer c
     {
       s7_pointer slot = opt_types_match(sc, cadr(sig), cadr(car_x));
       if (slot)
-	{
-	  opc->v[1].p = slot;
-	  opc->v[5].obj = (void *)c_object_value(slot_value(slot));
-	  opc->v[3].d_v_f = flt_func;
-	  opc->v[0].fd = opt_d_v;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[1].p = slot;
+          opc->v[5].obj = (void *)c_object_value(slot_value(slot));
+          opc->v[3].d_v_f = flt_func;
+          opc->v[0].fd = opt_d_v;
+          return_true(sc, car_x);
+        }}
   return_false(sc, car_x);
 }
 
@@ -60318,7 +60318,7 @@ static bool d_p_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer c
     {
       s7_pointer slot = opt_simple_symbol(sc, cadr(car_x));
       if (!slot)
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       opc->v[1].p = slot;
       opc->v[0].fd = opt_d_p_s;
       return_true(sc, car_x);
@@ -60356,17 +60356,17 @@ static bool d_7pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if (!ifunc)
     {
       if ((s_func == initial_value(sc->vector_ref_symbol)) && (is_normal_symbol(cadr(car_x))))  /* (vector-ref <float-vector> <int>)? */
-	{
-	  s7_pointer v_slot = s7_slot(sc, cadr(car_x));
-	  if (is_slot(v_slot))
-	    {
-	      s7_pointer v = slot_value(v_slot);
-	      if ((is_float_vector(v)) ||
-		  ((is_typed_t_vector(v)) && (typed_vector_typer_symbol(sc, v) == sc->is_float_symbol)))
-		{
-		  ifunc = float_vector_ref_d_7pi;
-		  if (is_float_vector(v)) s_func = initial_value(sc->float_vector_ref_symbol);
-		}}}
+        {
+          s7_pointer v_slot = s7_slot(sc, cadr(car_x));
+          if (is_slot(v_slot))
+            {
+              s7_pointer v = slot_value(v_slot);
+              if ((is_float_vector(v)) ||
+                  ((is_typed_t_vector(v)) && (typed_vector_typer_symbol(sc, v) == sc->is_float_symbol)))
+                {
+                  ifunc = float_vector_ref_d_7pi;
+                  if (is_float_vector(v)) s_func = initial_value(sc->float_vector_ref_symbol);
+                }}}
       if (!ifunc) return_false(sc, car_x);
     }
   opc->v[3].d_7pi_f = ifunc;
@@ -60375,42 +60375,42 @@ static bool d_7pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       s7_pointer arg2, p, obj;
       opc->v[1].p = s7_slot(sc, cadr(car_x));
       if (!is_slot(opc->v[1].p))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
 
       obj = slot_value(opc->v[1].p);
       if ((is_target_or_its_alias(car(car_x), s_func, sc->float_vector_ref_symbol)) &&
-	  ((!is_float_vector(obj)) ||   /* if it's float-vector-ref, make sure obj is a float-vector */
-	   (vector_rank(obj) > 1)))
-	return_false(sc, car_x);        /*   but if it's e.g. (block-ref...), go on */
+          ((!is_float_vector(obj)) ||   /* if it's float-vector-ref, make sure obj is a float-vector */
+           (vector_rank(obj) > 1)))
+        return_false(sc, car_x);        /*   but if it's e.g. (block-ref...), go on */
 
       arg2 = caddr(car_x);
       if (!is_pair(arg2))
-	{
-	  if (is_t_integer(arg2))
-	    {
-	      opc->v[2].i = integer(arg2);
-	      opc->v[0].fd = opt_d_7pi_sc;
-	      return_true(sc, car_x);
-	    }
-	  p = opt_integer_symbol(sc, arg2);
-	  if (!p)
-	    return_false(sc, car_x);
-	  opc->v[2].p = p;
-	  opc->v[0].fd = opt_d_7pi_ss;
-	  if (is_target_or_its_alias(car(car_x), s_func, sc->float_vector_ref_symbol))
-	    {
-	      opc->v[0].fd = (loop_end_fits(opc->v[2].p, vector_length(obj))) ? opt_d_7pi_ss_fvref_direct : opt_d_7pi_ss_fvref;
-	      if (opc->v[0].fd == opt_d_7pi_ss_fvref_direct) opc->v[3].d_7pi_f = float_vector_ref_d_7pi_direct;
-	    }
-	  return_true(sc, car_x);
-	}
+        {
+          if (is_t_integer(arg2))
+            {
+              opc->v[2].i = integer(arg2);
+              opc->v[0].fd = opt_d_7pi_sc;
+              return_true(sc, car_x);
+            }
+          p = opt_integer_symbol(sc, arg2);
+          if (!p)
+            return_false(sc, car_x);
+          opc->v[2].p = p;
+          opc->v[0].fd = opt_d_7pi_ss;
+          if (is_target_or_its_alias(car(car_x), s_func, sc->float_vector_ref_symbol))
+            {
+              opc->v[0].fd = (loop_end_fits(opc->v[2].p, vector_length(obj))) ? opt_d_7pi_ss_fvref_direct : opt_d_7pi_ss_fvref;
+              if (opc->v[0].fd == opt_d_7pi_ss_fvref_direct) opc->v[3].d_7pi_f = float_vector_ref_d_7pi_direct;
+            }
+          return_true(sc, car_x);
+        }
       if (int_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[0].fd = opt_d_7pi_sf;
-	  opc->v[10].o1 = sc->opts[start];
-	  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fd = opt_d_7pi_sf;
+          opc->v[10].o1 = sc->opts[start];
+          opc->v[11].fi = opc->v[10].o1->v[0].fi;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
       return_false(sc, car_x);
     }
@@ -60424,14 +60424,14 @@ static bool d_7pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opt_info *o2 = sc->opts[sc->pc];
       if (int_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[0].fd = opt_d_7pi_ff;
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fp = sc->opts[start]->v[0].fp;
-	  opc->v[8].o1 = o2;
-	  opc->v[9].fi = o2->v[0].fi;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[0].fd = opt_d_7pi_ff;
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fp = sc->opts[start]->v[0].fp;
+          opc->v[8].o1 = o2;
+          opc->v[9].fi = o2->v[0].fi;
+          return_true(sc, car_x);
+        }}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -60447,15 +60447,15 @@ static bool d_ip_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       s7_pointer p = opt_integer_symbol(sc, cadr(car_x));
       if (p)
-	{
-	  opc->v[3].d_ip_f = pfunc;
-	  opc->v[1].p = p;
-	  opc->v[2].p = s7_slot(sc, caddr(car_x));
-	  if (is_slot(opc->v[2].p))    /* (with-sound (:reverb jc-reverb) (fm-violin 0 .1 440 .4 :reverb-amount .5)) */
-	    {
-	      opc->v[0].fd = opt_d_ip_ss;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opc->v[3].d_ip_f = pfunc;
+          opc->v[1].p = p;
+          opc->v[2].p = s7_slot(sc, caddr(car_x));
+          if (is_slot(opc->v[2].p))    /* (with-sound (:reverb jc-reverb) (fm-violin 0 .1 440 .4 :reverb-amount .5)) */
+            {
+              opc->v[0].fd = opt_d_ip_ss;
+              return_true(sc, car_x);
+            }}}
   return_false(sc, car_x);
 }
 
@@ -60469,29 +60469,29 @@ static bool d_pd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       s7_d_pd_t func = s7_d_pd_function(s_func);
       if (func)
-	{
-	  s7_pointer p, arg2 = caddr(car_x);
-	  int32_t start = sc->pc;
-	  opc->v[3].d_pd_f = func;
-	  opc->v[1].p = s7_slot(sc, cadr(car_x));
-	  if (!is_slot(opc->v[1].p))
-	    return_false(sc, car_x);
-	  p = opt_float_symbol(sc, arg2);
-	  if (p)
-	    {
-	      opc->v[2].p = p;
-	      opc->v[0].fd = opt_d_pd_ss;
-	      return_true(sc, car_x);
-	    }
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (float_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[0].fd = opt_d_pd_sf;
-	      opc->v[11].fd = opc->v[10].o1->v[0].fd;
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	}}
+        {
+          s7_pointer p, arg2 = caddr(car_x);
+          int32_t start = sc->pc;
+          opc->v[3].d_pd_f = func;
+          opc->v[1].p = s7_slot(sc, cadr(car_x));
+          if (!is_slot(opc->v[1].p))
+            return_false(sc, car_x);
+          p = opt_float_symbol(sc, arg2);
+          if (p)
+            {
+              opc->v[2].p = p;
+              opc->v[0].fd = opt_d_pd_ss;
+              return_true(sc, car_x);
+            }
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (float_optimize(sc, cddr(car_x)))
+            {
+              opc->v[0].fd = opt_d_pd_sf;
+              opc->v[11].fd = opc->v[10].o1->v[0].fd;
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+        }}
   return_false(sc, car_x);
 }
 
@@ -60581,52 +60581,52 @@ static bool d_vd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       s7_pointer slot = opt_types_match(sc, cadr(sig), cadr(car_x));
       if (slot)
-	{
-	  s7_pointer arg2 = caddr(car_x);
-	  int32_t start = sc->pc;
-	  opc->v[3].d_vd_f = vfunc;
-	  if (!is_pair(arg2))
-	    {
-	      opc->v[1].p = slot;
-	      opc->v[5].obj = (void *)c_object_value(slot_value(slot));
-	      if (is_small_real(arg2))
-		{
-		  opc->v[2].x = s7_number_to_real(sc, arg2);
-		  opc->v[0].fd = opt_d_vd_c;
-		  return_true(sc, car_x);
-		}
-	      opc->v[2].p = s7_slot(sc, arg2);
-	      if (is_slot(opc->v[2].p))
-		{
-		  if (is_t_real(slot_value(opc->v[2].p)))
-		    {
-		      opc->v[0].fd = opt_d_vd_s;
-		      return_true(sc, car_x);
-		    }
-		  if (!float_optimize(sc, cddr(car_x)))
-		    return_false(sc, car_x);
-		  if (d_vd_f_combinable(sc, start))
-		    return_true(sc, car_x);
-		  opc->v[0].fd = opt_d_vd_f;
-		  opc->v[8].o1 = sc->opts[start];
-		  opc->v[9].fd = sc->opts[start]->v[0].fd;
-		  return_true(sc, car_x);
-		}}
-	  else /* is pair arg2 */
-	    {
-	      if (float_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[1].p = slot;
-		  opc->v[5].obj = (void *)c_object_value(slot_value(slot));
-		  if (d_vd_f_combinable(sc, start))
-		    return_true(sc, car_x);
-		  opc->v[0].fd = opt_d_vd_f;
-		  opc->v[8].o1 = sc->opts[start];
-		  opc->v[9].fd = sc->opts[start]->v[0].fd;
-		  return_true(sc, car_x);
-		}
-	      sc->pc = start;
-	    }}}
+        {
+          s7_pointer arg2 = caddr(car_x);
+          int32_t start = sc->pc;
+          opc->v[3].d_vd_f = vfunc;
+          if (!is_pair(arg2))
+            {
+              opc->v[1].p = slot;
+              opc->v[5].obj = (void *)c_object_value(slot_value(slot));
+              if (is_small_real(arg2))
+                {
+                  opc->v[2].x = s7_number_to_real(sc, arg2);
+                  opc->v[0].fd = opt_d_vd_c;
+                  return_true(sc, car_x);
+                }
+              opc->v[2].p = s7_slot(sc, arg2);
+              if (is_slot(opc->v[2].p))
+                {
+                  if (is_t_real(slot_value(opc->v[2].p)))
+                    {
+                      opc->v[0].fd = opt_d_vd_s;
+                      return_true(sc, car_x);
+                    }
+                  if (!float_optimize(sc, cddr(car_x)))
+                    return_false(sc, car_x);
+                  if (d_vd_f_combinable(sc, start))
+                    return_true(sc, car_x);
+                  opc->v[0].fd = opt_d_vd_f;
+                  opc->v[8].o1 = sc->opts[start];
+                  opc->v[9].fd = sc->opts[start]->v[0].fd;
+                  return_true(sc, car_x);
+                }}
+          else /* is pair arg2 */
+            {
+              if (float_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[1].p = slot;
+                  opc->v[5].obj = (void *)c_object_value(slot_value(slot));
+                  if (d_vd_f_combinable(sc, start))
+                    return_true(sc, car_x);
+                  opc->v[0].fd = opt_d_vd_f;
+                  opc->v[8].o1 = sc->opts[start];
+                  opc->v[9].fd = sc->opts[start]->v[0].fd;
+                  return_true(sc, car_x);
+                }
+              sc->pc = start;
+            }}}
   return_false(sc, car_x);
 }
 
@@ -60652,25 +60652,25 @@ static bool d_id_sf_combinable(s7_scheme *sc, opt_info *opc)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if (o1->v[0].fd == opt_d_vd_s)
-	{
-	  opc->v[4].d_id_f = opc->v[3].d_id_f;
-	  opc->v[2].p = o1->v[1].p;
-	  opc->v[6].obj = o1->v[5].obj;
-	  opc->v[5].d_vd_f = o1->v[3].d_vd_f;
-	  opc->v[3].p = o1->v[2].p;
-	  opc->v[0].fd = opt_d_id_sfo;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}
+        {
+          opc->v[4].d_id_f = opc->v[3].d_id_f;
+          opc->v[2].p = o1->v[1].p;
+          opc->v[6].obj = o1->v[5].obj;
+          opc->v[5].d_vd_f = o1->v[3].d_vd_f;
+          opc->v[3].p = o1->v[2].p;
+          opc->v[0].fd = opt_d_id_sfo;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }
       if (o1->v[0].fd == opt_d_v)
-	{
-	  opc->v[6].p = o1->v[1].p;
-	  opc->v[2].obj = o1->v[5].obj;
-	  opc->v[5].d_v_f = o1->v[3].d_v_f;
-	  opc->v[0].fd = opt_d_id_sfo1;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[6].p = o1->v[1].p;
+          opc->v[2].obj = o1->v[5].obj;
+          opc->v[5].d_v_f = o1->v[3].d_v_f;
+          opc->v[0].fd = opt_d_id_sfo1;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -60688,44 +60688,44 @@ static bool d_id_ok_1(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointe
       s7_pointer arg2 = caddr(car_x);
       opc->v[1].p = p;
       if (is_t_real(arg2))
-	{
-	  opc->v[0].fd = opt_d_id_sc;
-	  opc->v[2].x = real(arg2);
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fd = opt_d_id_sc;
+          opc->v[2].x = real(arg2);
+          return_true(sc, car_x);
+        }
       if ((cadr(car_x) == arg2) && (flt_func == multiply_d_id))
-	{
-	  opc->v[0].fd = opt_d_i2_mul;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fd = opt_d_i2_mul;
+          return_true(sc, car_x);
+        }
       p = opt_float_symbol(sc, arg2);
       if (p)
-	{
-	  opc->v[0].fd = opt_d_id_ss;
-	  opc->v[2].p = p;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fd = opt_d_id_ss;
+          opc->v[2].p = p;
+          return_true(sc, car_x);
+        }
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  if (d_id_sf_combinable(sc, opc))
-	    return_true(sc, car_x);
-	  opc->v[0].fd = opt_d_id_sf;
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fd = sc->opts[start]->v[0].fd;
-	  return_true(sc, car_x);
-	}
+        {
+          if (d_id_sf_combinable(sc, opc))
+            return_true(sc, car_x);
+          opc->v[0].fd = opt_d_id_sf;
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fd = sc->opts[start]->v[0].fd;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
     }
   if (is_t_integer(cadr(car_x)))
     {
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[0].fd = opt_d_id_cf;
-	  opc->v[1].i = integer(cadr(car_x));
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fd = sc->opts[start]->v[0].fd;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fd = opt_d_id_cf;
+          opc->v[1].i = integer(cadr(car_x));
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fd = sc->opts[start]->v[0].fd;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
     }
   if (!expr_case) return_false(sc, car_x);
@@ -60735,11 +60735,11 @@ static bool d_id_ok_1(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointe
       opc->v[9].fi = opc->v[8].o1->v[0].fi;
       opc->v[10].o1 = sc->opts[sc->pc];
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[11].fd = opc->v[10].o1->v[0].fd;
-	  opc->v[0].fd = opt_d_id_ff;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[11].fd = opc->v[10].o1->v[0].fd;
+          opc->v[0].fd = opt_d_id_ff;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
     }
   return_false(sc, car_x);
@@ -60810,23 +60810,23 @@ static bool d_dd_sf_combinable(s7_scheme *sc, opt_info *opc, s7_d_dd_t func)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if ((o1->v[0].fd == opt_d_7pi_ss) || (o1->v[0].fd == opt_d_7pi_ss_fvref) || (o1->v[0].fd == opt_d_7pi_ss_fvref_direct))
-	{
-	  if (func)
-	    {
-	      opc->v[4].d_dd_f = opc->v[3].d_dd_f; /* need room for 3 symbols */
-	      opc->v[0].fd = opt_d_dd_sfo;
-	    }
-	  else
-	    {
-	      opc->v[4].d_7dd_f = opc->v[3].d_7dd_f; /* need room for 3 symbols */
-	      opc->v[0].fd = opt_d_7dd_sfo;
-	    }
-	  opc->v[2].p = o1->v[1].p;
-	  opc->v[3].p = o1->v[2].p;
-	  opc->v[5].d_7pi_f = o1->v[3].d_7pi_f;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          if (func)
+            {
+              opc->v[4].d_dd_f = opc->v[3].d_dd_f; /* need room for 3 symbols */
+              opc->v[0].fd = opt_d_dd_sfo;
+            }
+          else
+            {
+              opc->v[4].d_7dd_f = opc->v[3].d_7dd_f; /* need room for 3 symbols */
+              opc->v[0].fd = opt_d_7dd_sfo;
+            }
+          opc->v[2].p = o1->v[1].p;
+          opc->v[3].p = o1->v[2].p;
+          opc->v[5].d_7pi_f = o1->v[3].d_7pi_f;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -60859,23 +60859,23 @@ static bool d_dd_fs_combinable(s7_scheme *sc, opt_info *opc, s7_d_dd_t func)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if ((o1->v[0].fd == opt_d_7pi_ss) || (o1->v[0].fd == opt_d_7pi_ss_fvref) || (o1->v[0].fd == opt_d_7pi_ss_fvref_direct))
-	{
-	  if (func)
-	    {
-	      opc->v[4].d_dd_f = opc->v[3].d_dd_f; /* need room for 3 symbols */
-	      opc->v[0].fd = opt_d_dd_fso;
-	    }
-	  else
-	    {
-	      opc->v[4].d_7dd_f = opc->v[3].d_7dd_f;
-	      opc->v[0].fd = opt_d_7dd_fso;
-	    }
-	  opc->v[2].p = o1->v[1].p;
-	  opc->v[3].p = o1->v[2].p;
-	  opc->v[5].d_7pi_f = o1->v[3].d_7pi_f;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          if (func)
+            {
+              opc->v[4].d_dd_f = opc->v[3].d_dd_f; /* need room for 3 symbols */
+              opc->v[0].fd = opt_d_dd_fso;
+            }
+          else
+            {
+              opc->v[4].d_7dd_f = opc->v[3].d_7dd_f;
+              opc->v[0].fd = opt_d_7dd_fso;
+            }
+          opc->v[2].p = o1->v[1].p;
+          opc->v[3].p = o1->v[2].p;
+          opc->v[5].d_7pi_f = o1->v[3].d_7pi_f;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -61037,49 +61037,49 @@ static bool d_dd_ff_combinable(s7_scheme *sc, opt_info *opc, int32_t start)
     {
       /* opc->v[3] is in use */
       if ((o2->v[0].fd == opt_d_v) &&
-	  (sc->pc == start + 2))
-	{
-	  opc->v[1].obj = o1->v[5].obj;
-	  opc->v[6].p = o1->v[1].p;
-	  opc->v[4].d_v_f = o1->v[3].d_v_f;
-	  opc->v[2].obj = o2->v[5].obj;
-	  opc->v[7].p = o2->v[1].p;
-	  opc->v[5].d_v_f = o2->v[3].d_v_f;
-	  opc->v[0].fd = (opc->v[3].d_dd_f == multiply_d_dd) ? opt_d_dd_ff_mul2 : opt_d_dd_ff_o2;
-	  sc->pc -= 2;
-	  return_true(sc, NULL);
-	}
+          (sc->pc == start + 2))
+        {
+          opc->v[1].obj = o1->v[5].obj;
+          opc->v[6].p = o1->v[1].p;
+          opc->v[4].d_v_f = o1->v[3].d_v_f;
+          opc->v[2].obj = o2->v[5].obj;
+          opc->v[7].p = o2->v[1].p;
+          opc->v[5].d_v_f = o2->v[3].d_v_f;
+          opc->v[0].fd = (opc->v[3].d_dd_f == multiply_d_dd) ? opt_d_dd_ff_mul2 : opt_d_dd_ff_o2;
+          sc->pc -= 2;
+          return_true(sc, NULL);
+        }
       if ((o2->v[0].fd == opt_d_vd_s) &&
-	  (sc->pc == start + 2))
-	{
-	  opc->v[4].d_dd_f = opc->v[3].d_dd_f; /* make room for symbols */
-	  opc->v[1].obj = o1->v[5].obj;
-	  opc->v[7].p = o1->v[1].p;
-	  opc->v[5].d_v_f = o1->v[3].d_v_f;
-	  opc->v[2].obj = o2->v[5].obj;
-	  opc->v[8].p = o2->v[1].p;
-	  opc->v[6].d_vd_f = o2->v[3].d_vd_f;
-	  opc->v[3].p = o2->v[2].p;
-	  opc->v[0].fd = opt_d_dd_ff_o3;
-	  sc->pc -= 2;
-	  return_true(sc, NULL);
-	}
+          (sc->pc == start + 2))
+        {
+          opc->v[4].d_dd_f = opc->v[3].d_dd_f; /* make room for symbols */
+          opc->v[1].obj = o1->v[5].obj;
+          opc->v[7].p = o1->v[1].p;
+          opc->v[5].d_v_f = o1->v[3].d_v_f;
+          opc->v[2].obj = o2->v[5].obj;
+          opc->v[8].p = o2->v[1].p;
+          opc->v[6].d_vd_f = o2->v[3].d_vd_f;
+          opc->v[3].p = o2->v[2].p;
+          opc->v[0].fd = opt_d_dd_ff_o3;
+          sc->pc -= 2;
+          return_true(sc, NULL);
+        }
       if ((o2->v[0].fd == opt_d_vd_o) &&
-	  (sc->pc == start + 2))
-	{
-	  opc->v[1].obj = o1->v[5].obj;
-	  opc->v[8].p = o1->v[1].p;
-	  opc->v[2].d_v_f = o1->v[3].d_v_f;
-	  opc->v[7].d_vd_f = o2->v[3].d_vd_f;
-	  opc->v[4].d_v_f = o2->v[4].d_v_f;
-	  opc->v[5].obj = o2->v[5].obj;
-	  opc->v[9].p = o2->v[1].p;
-	  opc->v[6].obj = o2->v[6].obj;
-	  opc->v[10].p = o2->v[2].p;
-	  opc->v[0].fd = (opc->v[3].d_dd_f == multiply_d_dd) ? opt_d_dd_ff_mul4 : opt_d_dd_ff_o4;
-	  sc->pc -= 2;
-	  return_true(sc, NULL);
-	}
+          (sc->pc == start + 2))
+        {
+          opc->v[1].obj = o1->v[5].obj;
+          opc->v[8].p = o1->v[1].p;
+          opc->v[2].d_v_f = o1->v[3].d_v_f;
+          opc->v[7].d_vd_f = o2->v[3].d_vd_f;
+          opc->v[4].d_v_f = o2->v[4].d_v_f;
+          opc->v[5].obj = o2->v[5].obj;
+          opc->v[9].p = o2->v[1].p;
+          opc->v[6].obj = o2->v[6].obj;
+          opc->v[10].p = o2->v[2].p;
+          opc->v[0].fd = (opc->v[3].d_dd_f == multiply_d_dd) ? opt_d_dd_ff_mul4 : opt_d_dd_ff_o4;
+          sc->pc -= 2;
+          return_true(sc, NULL);
+        }
       opc->v[1].obj = o1->v[5].obj;
       opc->v[4].p = o1->v[1].p;
       opc->v[2].d_v_f = o1->v[3].d_v_f;
@@ -61089,27 +61089,27 @@ static bool d_dd_ff_combinable(s7_scheme *sc, opt_info *opc, int32_t start)
   if (o1->v[0].fd == opt_d_dd_fso)
     {
       if (o2->v[0].fd == opt_d_dd_fso)
-	{
-	  if ((o1->v[4].d_dd_f == multiply_d_dd) &&
-	      (o2->v[4].d_dd_f == multiply_d_dd) &&
-	      ((o1->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o1->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
-	      ((o2->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o2->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)))
-	    opc->v[0].fd = opt_d_mm_fff; /* a placeholder (never called) */
-	  else opc->v[0].fd = opt_d_dd_fff;
-	  return(finish_dd_fso(opc, o1, o2));
-	}}
+        {
+          if ((o1->v[4].d_dd_f == multiply_d_dd) &&
+              (o2->v[4].d_dd_f == multiply_d_dd) &&
+              ((o1->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o1->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
+              ((o2->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o2->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)))
+            opc->v[0].fd = opt_d_mm_fff; /* a placeholder (never called) */
+          else opc->v[0].fd = opt_d_dd_fff;
+          return(finish_dd_fso(opc, o1, o2));
+        }}
   if (o1->v[0].fd == opt_d_dd_sfo)
     {
       if (o2->v[0].fd == opt_d_dd_sfo)
-	{
-	  if ((o1->v[4].d_dd_f == multiply_d_dd) &&
-	      (o2->v[4].d_dd_f == multiply_d_dd) &&
-	      ((o1->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o1->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
-	      ((o2->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o2->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)))
-	    opc->v[0].fd = opt_d_mm_fff; /* multiply is commutative */
-	  else opc->v[0].fd = opt_d_dd_fff_rev;
-	  return(finish_dd_fso(opc, o1, o2));
-	}}
+        {
+          if ((o1->v[4].d_dd_f == multiply_d_dd) &&
+              (o2->v[4].d_dd_f == multiply_d_dd) &&
+              ((o1->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o1->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
+              ((o2->v[5].d_7pi_f == float_vector_ref_d_7pi) || (o2->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)))
+            opc->v[0].fd = opt_d_mm_fff; /* multiply is commutative */
+          else opc->v[0].fd = opt_d_dd_fff_rev;
+          return(finish_dd_fso(opc, o1, o2));
+        }}
   return_false(sc, NULL);
 }
 
@@ -61125,26 +61125,26 @@ static bool d_dd_call_combinable(s7_scheme *sc, opt_info *opc, s7_d_dd_t func)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if (o1->v[0].fd == opt_d_v)
-	{
-	  opc->v[2].x = opc->v[1].x;
-	  opc->v[6].p = o1->v[1].p;
-	  opc->v[1].obj = o1->v[5].obj;
-	  opc->v[4].d_v_f = o1->v[3].d_v_f;
-	  opc->v[0].fd = (func) ? opt_d_dd_cfo : opt_d_7dd_cfo;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}
+        {
+          opc->v[2].x = opc->v[1].x;
+          opc->v[6].p = o1->v[1].p;
+          opc->v[1].obj = o1->v[5].obj;
+          opc->v[4].d_v_f = o1->v[3].d_v_f;
+          opc->v[0].fd = (func) ? opt_d_dd_cfo : opt_d_7dd_cfo;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }
       if (o1->v[0].fd == opt_d_vd_s)
-	{
-	  opc->v[4].x = opc->v[1].x;
-	  opc->v[1].p = o1->v[1].p;
-	  opc->v[6].obj = o1->v[5].obj;
-	  opc->v[2].p = o1->v[2].p;
-	  opc->v[5].d_vd_f = o1->v[3].d_vd_f;
-	  opc->v[0].fd = (func) ? opt_d_dd_cfo1 : opt_d_7dd_cfo1;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[4].x = opc->v[1].x;
+          opc->v[1].p = o1->v[1].p;
+          opc->v[6].obj = o1->v[5].obj;
+          opc->v[2].p = o1->v[2].p;
+          opc->v[5].d_vd_f = o1->v[3].d_vd_f;
+          opc->v[0].fd = (func) ? opt_d_dd_cfo1 : opt_d_7dd_cfo1;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -61172,33 +61172,33 @@ static bool d_dd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if (is_small_real(arg1))
     {
       if (is_small_real(arg2))
-	{
-	  if ((!is_t_real(arg1)) && (!is_t_real(arg2)))
-	    return_false(sc, car_x);
-	  opc->v[1].x = s7_number_to_real(sc, arg1);
-	  opc->v[2].x = s7_number_to_real(sc, arg2);
-	  opc->v[0].fd = (func) ? opt_d_dd_cc : opt_d_7dd_cc;
-	  return_true(sc, car_x);
-	}
+        {
+          if ((!is_t_real(arg1)) && (!is_t_real(arg2)))
+            return_false(sc, car_x);
+          opc->v[1].x = s7_number_to_real(sc, arg1);
+          opc->v[2].x = s7_number_to_real(sc, arg2);
+          opc->v[0].fd = (func) ? opt_d_dd_cc : opt_d_7dd_cc;
+          return_true(sc, car_x);
+        }
       slot = opt_float_symbol(sc, arg2);
       if (slot)
-	{
-	  opc->v[1].p = slot;
-	  opc->v[2].x = s7_number_to_real(sc, arg1); /* move arg1? */
-	  opc->v[0].fd = (func) ? opt_d_dd_cs : opt_d_7dd_cs;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].p = slot;
+          opc->v[2].x = s7_number_to_real(sc, arg1); /* move arg1? */
+          opc->v[0].fd = (func) ? opt_d_dd_cs : opt_d_7dd_cs;
+          return_true(sc, car_x);
+        }
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[1].x = s7_number_to_real(sc, arg1);
-	  if (d_dd_call_combinable(sc, opc, func))
-	    return_true(sc, car_x);
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fd = sc->opts[start]->v[0].fd;
-	  opc->v[0].fd = (func) ? opt_d_dd_cf : opt_d_7dd_cf;
-	  if ((opc->v[1].x == 1.0) && (func == subtract_d_dd)) opc->v[0].fd = opt_d_dd_1f_subtract;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].x = s7_number_to_real(sc, arg1);
+          if (d_dd_call_combinable(sc, opc, func))
+            return_true(sc, car_x);
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fd = sc->opts[start]->v[0].fd;
+          opc->v[0].fd = (func) ? opt_d_dd_cf : opt_d_7dd_cf;
+          if ((opc->v[1].x == 1.0) && (func == subtract_d_dd)) opc->v[0].fd = opt_d_dd_1f_subtract;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
       return_false(sc, car_x);
     }
@@ -61209,43 +61209,43 @@ static bool d_dd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opc->v[1].p = slot;
       if (is_small_real(arg2))
-	{
-	  opc->v[2].x = s7_number_to_real(sc, arg2);
-	  if (func)
-	    opc->v[0].fd = (func == subtract_d_dd) ? opt_d_dd_sc_sub : opt_d_dd_sc;
-	  else opc->v[0].fd = opt_d_7dd_sc;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].x = s7_number_to_real(sc, arg2);
+          if (func)
+            opc->v[0].fd = (func == subtract_d_dd) ? opt_d_dd_sc_sub : opt_d_dd_sc;
+          else opc->v[0].fd = opt_d_7dd_sc;
+          return_true(sc, car_x);
+        }
       slot = opt_float_symbol(sc, arg2);
       if (slot)
-	{
-	  opc->v[2].p = slot;
-	  if (func)
-	    {
-	      if (func == multiply_d_dd)
-		opc->v[0].fd = opt_d_dd_ss_mul;
-	      else opc->v[0].fd = (func == add_d_dd) ? opt_d_dd_ss_add : opt_d_dd_ss;
-	    }
-	  else opc->v[0].fd = opt_d_7dd_ss;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].p = slot;
+          if (func)
+            {
+              if (func == multiply_d_dd)
+                opc->v[0].fd = opt_d_dd_ss_mul;
+              else opc->v[0].fd = (func == add_d_dd) ? opt_d_dd_ss_add : opt_d_dd_ss;
+            }
+          else opc->v[0].fd = opt_d_7dd_ss;
+          return_true(sc, car_x);
+        }
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  if (d_dd_sf_combinable(sc, opc, func))
-	    return_true(sc, car_x);
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fd = sc->opts[start]->v[0].fd;
-	  if (func)
-	    {
-	      opc->v[0].fd = (func == multiply_d_dd) ? opt_d_dd_sf_mul :
-		((func == add_d_dd) ? opt_d_dd_sf_add :
-		 ((func == subtract_d_dd) ? opt_d_dd_sf_sub : opt_d_dd_sf));
-	      if ((func == multiply_d_dd) && (opc->v[5].fd == opt_d_7pii_scs))
-		opc->v[0].fd = opt_d_dd_sf_mul_fvref;
-	    }
-	  else opc->v[0].fd = opt_d_7dd_sf;
-	  return_true(sc, car_x);
-	}
+        {
+          if (d_dd_sf_combinable(sc, opc, func))
+            return_true(sc, car_x);
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fd = sc->opts[start]->v[0].fd;
+          if (func)
+            {
+              opc->v[0].fd = (func == multiply_d_dd) ? opt_d_dd_sf_mul :
+                ((func == add_d_dd) ? opt_d_dd_sf_add :
+                 ((func == subtract_d_dd) ? opt_d_dd_sf_sub : opt_d_dd_sf));
+              if ((func == multiply_d_dd) && (opc->v[5].fd == opt_d_7pii_scs))
+                opc->v[0].fd = opt_d_dd_sf_mul_fvref;
+            }
+          else opc->v[0].fd = opt_d_7dd_sf;
+          return_true(sc, car_x);
+        }
       sc->pc = start;
       return_false(sc, car_x);
     }
@@ -61262,137 +61262,137 @@ static bool d_dd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       int32_t start2 = sc->pc;
       if (is_small_real(arg2))
-	{
-	  opc->v[2].x = s7_number_to_real(sc, arg2);
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fd = sc->opts[start]->v[0].fd;
-	  if (func)
-	    {
-	      if (func == add_d_dd)
-		{
-		  opc->v[0].fd = (opc->v[5].fd == opt_d_7pi_ss_fvref_direct) ? opt_d_dd_fc_fvref_add : opt_d_dd_fc_add;
-		  return_true(sc, car_x);
-		}
-	      if (func == subtract_d_dd)
-		{
-		  opc->v[0].fd = opt_d_dd_fc_subtract;
-		  /* if o1->v[0].fd = opt_d_7d_c and its o->v[3].d_7d_f = random_d_7d it's (- (random f1) f2) */
-		  if ((opc == sc->opts[sc->pc - 2]) &&
-		      (sc->opts[start]->v[0].fd == opt_d_7d_c) &&
-		      (sc->opts[start]->v[3].d_7d_f == random_d_7d))
-		    {
-		      opc->v[0].fd = opt_subtract_random_f_f;
-		      opc->v[1].x = sc->opts[start]->v[1].x; /* random arg */
-		      backup_pc(sc);
-		    }}
-	      else opc->v[0].fd = opt_d_dd_fc;
-	    }
-	  else opc->v[0].fd = opt_d_7dd_fc;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].x = s7_number_to_real(sc, arg2);
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fd = sc->opts[start]->v[0].fd;
+          if (func)
+            {
+              if (func == add_d_dd)
+                {
+                  opc->v[0].fd = (opc->v[5].fd == opt_d_7pi_ss_fvref_direct) ? opt_d_dd_fc_fvref_add : opt_d_dd_fc_add;
+                  return_true(sc, car_x);
+                }
+              if (func == subtract_d_dd)
+                {
+                  opc->v[0].fd = opt_d_dd_fc_subtract;
+                  /* if o1->v[0].fd = opt_d_7d_c and its o->v[3].d_7d_f = random_d_7d it's (- (random f1) f2) */
+                  if ((opc == sc->opts[sc->pc - 2]) &&
+                      (sc->opts[start]->v[0].fd == opt_d_7d_c) &&
+                      (sc->opts[start]->v[3].d_7d_f == random_d_7d))
+                    {
+                      opc->v[0].fd = opt_subtract_random_f_f;
+                      opc->v[1].x = sc->opts[start]->v[1].x; /* random arg */
+                      backup_pc(sc);
+                    }}
+              else opc->v[0].fd = opt_d_dd_fc;
+            }
+          else opc->v[0].fd = opt_d_7dd_fc;
+          return_true(sc, car_x);
+        }
       slot = opt_float_symbol(sc, arg2);
       if (slot)
-	{
-	  opc->v[1].p = slot;
-	  if (d_dd_fs_combinable(sc, opc, func))
-	    return_true(sc, car_x);
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fd = sc->opts[start]->v[0].fd;
-	  if (func)
-	    {
-	      opc->v[0].fd = (func == multiply_d_dd) ? opt_d_dd_fs_mul :
-		((func == add_d_dd) ? opt_d_dd_fs_add :
-		 ((func == subtract_d_dd) ? opt_d_dd_fs_sub : opt_d_dd_fs));
-	      if ((func == add_d_dd) && (opc->v[5].fd == opt_d_7pii_scs))
-		opc->v[0].fd = opt_d_dd_fs_add_fvref;
-	    }
-	  else opc->v[0].fd = opt_d_7dd_fs;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].p = slot;
+          if (d_dd_fs_combinable(sc, opc, func))
+            return_true(sc, car_x);
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fd = sc->opts[start]->v[0].fd;
+          if (func)
+            {
+              opc->v[0].fd = (func == multiply_d_dd) ? opt_d_dd_fs_mul :
+                ((func == add_d_dd) ? opt_d_dd_fs_add :
+                 ((func == subtract_d_dd) ? opt_d_dd_fs_sub : opt_d_dd_fs));
+              if ((func == add_d_dd) && (opc->v[5].fd == opt_d_7pii_scs))
+                opc->v[0].fd = opt_d_dd_fs_add_fvref;
+            }
+          else opc->v[0].fd = opt_d_7dd_fs;
+          return_true(sc, car_x);
+        }
       opc->v[10].o1 = sc->opts[sc->pc];
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opt_info *o2;
-	  opc->v[8].o1 = o1;
-	  opc->v[9].fd = o1->v[0].fd;
-	  opc->v[11].fd = opc->v[10].o1->v[0].fd;
-	  if (func)
-	    {
-	      if (d_dd_ff_combinable(sc, opc, start))
-		return_true(sc, car_x);
-	      opc->v[0].fd = opt_d_dd_ff;
-	      if (func == multiply_d_dd)
-		{
-		  if (arg1 == arg2)
-		    opc->v[0].fd = opt_d_dd_ff_square;
-		  else
-		    if ((opc->v[9].fd == opt_d_7pii_sss_unchecked) && (opc->v[11].fd == opt_d_7pii_sss_unchecked) &&
-			(o1->v[4].d_7pii_f == float_vector_ref_d_7pii))
-		      opc->v[0].fd = opt_d_dd_ff_mul_sss_unchecked;
-		    else opc->v[0].fd = opt_d_dd_ff_mul;
-		  return_true(sc, car_x);
-		}
-	      o2 = sc->opts[start2]; /* this is opc->v[10].o1 */
-	      if (func == add_d_dd)
-		{
-		  if (o2->v[0].fd == opt_d_dd_ff_mul)
-		    {
-		      opc->v[0].fd = opt_d_dd_ff_add_mul;
-		      opc->v[4].o1 = o1;            /* add first arg */
-		      opc->v[5].fd = o1->v[0].fd;
-		      opc->v[8].o1 = o2->v[8].o1;   /* mul first arg */
-		      opc->v[9].fd = o2->v[9].fd;
-		      opc->v[10].o1 = o2->v[10].o1; /* mul second arg */
-		      opc->v[11].fd = o2->v[11].fd;
-		      return_true(sc, car_x);
-		    }
-		  if ((o2->v[0].fd == opt_d_7pi_sf) &&
-		      ((o2->v[3].d_7pi_f == float_vector_ref_d_7pi) || (o2->v[3].d_7pi_f == float_vector_ref_d_7pi_direct)))
-		    {
-		      opc->v[0].fd = opt_d_dd_ff_add_fv_ref;
-		      opc->v[6].p = o2->v[1].p;
-		      opc->v[8].o1 = o2->v[10].o1; /* sc->opts[start2 + 1]; */
-		      opc->v[9].fi = o2->v[11].fi; /* sc->opts[start2 + 1]->v[0].fi; */
-		    }
-		  else
-		    {
-		      opc->v[0].fd = opt_d_dd_ff_add;
-		      opc->v[10].o1 = o2;
-		      opc->v[11].fd = o2->v[0].fd;
-
-		      if ((o1->v[0].fd == opt_d_7pi_ss_fvref_direct) && (opc->v[11].fd == opt_d_7dd_ff))
-			{
-			  opt_info *ov = opc->v[10].o1;
-			  if ((ov->v[3].d_7dd_f == divide_d_7dd) && (ov->v[11].fd == opt_d_id_sf) && (ov->v[9].fd == opt_d_7pi_ss_fvref_direct))
-			    {
-			      opc->v[8].o1 = ov->v[8].o1;
-			      opc->v[10].o1 = ov->v[10].o1;
-			      opc->v[0].fd = opt_d_7dd_ff_add_div;
-			    }
-			  else opc->v[0].fd = opt_d_7dd_ff_add_fv_ref_direct;
-			}}
-		  opc->v[4].o1 = o1;              /* sc->opts[start]; */
-		  opc->v[5].fd = o1->v[0].fd;     /* sc->opts[start]->v[0].fd; */
-		  return_true(sc, car_x);
-		}
-	      if (func == subtract_d_dd)
-		{
-		  opc->v[0].fd = opt_d_dd_ff_sub;
-		  opc->v[4].o1 = o1;          /* sc->opts[start]; */
-		  opc->v[5].fd = o1->v[0].fd; /* sc->opts[start]->v[0].fd; */
-		  opc->v[10].o1 = o2;
-		  opc->v[11].fd = o2->v[0].fd;
-		  return_true(sc, car_x);
-		}}
-	  else
-	    {
-	      opc->v[0].fd = opt_d_7dd_ff;
-	      if ((opc->v[11].fd == opt_d_dd_ff_add_fv_ref) &&
-		  (opc->v[3].d_7dd_f == divide_d_7dd))
-		opc->v[0].fd = opt_d_7dd_ff_div_add;
-	    }
-	  return_true(sc, car_x);
-	}}
+        {
+          opt_info *o2;
+          opc->v[8].o1 = o1;
+          opc->v[9].fd = o1->v[0].fd;
+          opc->v[11].fd = opc->v[10].o1->v[0].fd;
+          if (func)
+            {
+              if (d_dd_ff_combinable(sc, opc, start))
+                return_true(sc, car_x);
+              opc->v[0].fd = opt_d_dd_ff;
+              if (func == multiply_d_dd)
+                {
+                  if (arg1 == arg2)
+                    opc->v[0].fd = opt_d_dd_ff_square;
+                  else
+                    if ((opc->v[9].fd == opt_d_7pii_sss_unchecked) && (opc->v[11].fd == opt_d_7pii_sss_unchecked) &&
+                        (o1->v[4].d_7pii_f == float_vector_ref_d_7pii))
+                      opc->v[0].fd = opt_d_dd_ff_mul_sss_unchecked;
+                    else opc->v[0].fd = opt_d_dd_ff_mul;
+                  return_true(sc, car_x);
+                }
+              o2 = sc->opts[start2]; /* this is opc->v[10].o1 */
+              if (func == add_d_dd)
+                {
+                  if (o2->v[0].fd == opt_d_dd_ff_mul)
+                    {
+                      opc->v[0].fd = opt_d_dd_ff_add_mul;
+                      opc->v[4].o1 = o1;            /* add first arg */
+                      opc->v[5].fd = o1->v[0].fd;
+                      opc->v[8].o1 = o2->v[8].o1;   /* mul first arg */
+                      opc->v[9].fd = o2->v[9].fd;
+                      opc->v[10].o1 = o2->v[10].o1; /* mul second arg */
+                      opc->v[11].fd = o2->v[11].fd;
+                      return_true(sc, car_x);
+                    }
+                  if ((o2->v[0].fd == opt_d_7pi_sf) &&
+                      ((o2->v[3].d_7pi_f == float_vector_ref_d_7pi) || (o2->v[3].d_7pi_f == float_vector_ref_d_7pi_direct)))
+                    {
+                      opc->v[0].fd = opt_d_dd_ff_add_fv_ref;
+                      opc->v[6].p = o2->v[1].p;
+                      opc->v[8].o1 = o2->v[10].o1; /* sc->opts[start2 + 1]; */
+                      opc->v[9].fi = o2->v[11].fi; /* sc->opts[start2 + 1]->v[0].fi; */
+                    }
+                  else
+                    {
+                      opc->v[0].fd = opt_d_dd_ff_add;
+                      opc->v[10].o1 = o2;
+                      opc->v[11].fd = o2->v[0].fd;
+
+                      if ((o1->v[0].fd == opt_d_7pi_ss_fvref_direct) && (opc->v[11].fd == opt_d_7dd_ff))
+                        {
+                          opt_info *ov = opc->v[10].o1;
+                          if ((ov->v[3].d_7dd_f == divide_d_7dd) && (ov->v[11].fd == opt_d_id_sf) && (ov->v[9].fd == opt_d_7pi_ss_fvref_direct))
+                            {
+                              opc->v[8].o1 = ov->v[8].o1;
+                              opc->v[10].o1 = ov->v[10].o1;
+                              opc->v[0].fd = opt_d_7dd_ff_add_div;
+                            }
+                          else opc->v[0].fd = opt_d_7dd_ff_add_fv_ref_direct;
+                        }}
+                  opc->v[4].o1 = o1;              /* sc->opts[start]; */
+                  opc->v[5].fd = o1->v[0].fd;     /* sc->opts[start]->v[0].fd; */
+                  return_true(sc, car_x);
+                }
+              if (func == subtract_d_dd)
+                {
+                  opc->v[0].fd = opt_d_dd_ff_sub;
+                  opc->v[4].o1 = o1;          /* sc->opts[start]; */
+                  opc->v[5].fd = o1->v[0].fd; /* sc->opts[start]->v[0].fd; */
+                  opc->v[10].o1 = o2;
+                  opc->v[11].fd = o2->v[0].fd;
+                  return_true(sc, car_x);
+                }}
+          else
+            {
+              opc->v[0].fd = opt_d_7dd_ff;
+              if ((opc->v[11].fd == opt_d_dd_ff_add_fv_ref) &&
+                  (opc->v[3].d_7dd_f == divide_d_7dd))
+                opc->v[0].fd = opt_d_7dd_ff_div_add;
+            }
+          return_true(sc, car_x);
+        }}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -61487,54 +61487,54 @@ static bool d_ddd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       opc->v[1].p = slot;
       slot = opt_float_symbol(sc, arg2);
       if (slot)
-	{
-	  s7_pointer arg3 = cadddr(car_x);
-	  opc->v[2].p = slot;
-	  slot = opt_float_symbol(sc, arg3);
-	  if (slot)
-	    {
-	      opc->v[3].p = slot;
-	      opc->v[0].fd = opt_d_ddd_sss;
-	      return_true(sc, car_x);
-	    }
-	  if (float_optimize(sc, cdddr(car_x)))
-	    {
-	      opc->v[11].fd = opc->v[10].o1->v[0].fd;
-	      opc->v[0].fd = opt_d_ddd_ssf;
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = start;
-	}
+        {
+          s7_pointer arg3 = cadddr(car_x);
+          opc->v[2].p = slot;
+          slot = opt_float_symbol(sc, arg3);
+          if (slot)
+            {
+              opc->v[3].p = slot;
+              opc->v[0].fd = opt_d_ddd_sss;
+              return_true(sc, car_x);
+            }
+          if (float_optimize(sc, cdddr(car_x)))
+            {
+              opc->v[11].fd = opc->v[10].o1->v[0].fd;
+              opc->v[0].fd = opt_d_ddd_ssf;
+              return_true(sc, car_x);
+            }
+          sc->pc = start;
+        }
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[8].o1 = sc->opts[sc->pc];
-	  if (float_optimize(sc, cdddr(car_x)))
-	    {
-	      opc->v[0].fd = opt_d_ddd_sff;
-	      opc->v[11].fd = opc->v[10].o1->v[0].fd;
-	      opc->v[9].fd = opc->v[8].o1->v[0].fd;
-	      return_true(sc, car_x);
-	    }}
+        {
+          opc->v[8].o1 = sc->opts[sc->pc];
+          if (float_optimize(sc, cdddr(car_x)))
+            {
+              opc->v[0].fd = opt_d_ddd_sff;
+              opc->v[11].fd = opc->v[10].o1->v[0].fd;
+              opc->v[9].fd = opc->v[8].o1->v[0].fd;
+              return_true(sc, car_x);
+            }}
       sc->pc = start;
     }
   if (float_optimize(sc, cdr(car_x)))
     {
       opc->v[8].o1 = sc->opts[sc->pc];
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[5].o1 = sc->opts[sc->pc];
-	  if (float_optimize(sc, cdddr(car_x)))
-	    {
-	      if (d_ddd_fff_combinable(sc, opc, start))
-		return_true(sc, car_x);
-	      opc->v[0].fd = opt_d_ddd_fff; /* tfft: (* xout xin iw) (+ (* xout xin iw) (* yout yin ih) (* zout zin id)) */
-	      opc->v[11].fd = opc->v[10].o1->v[0].fd;
-	      opc->v[9].fd = opc->v[8].o1->v[0].fd;
-	      opc->v[6].fd = opc->v[5].o1->v[0].fd;
-	      if ((f == multiply_d_ddd) && (opc->v[11].fd == opt_D_s) && (opc->v[9].fd == opt_D_s) && (opc->v[6].fd == opt_d_s))
-		opc->v[0].fd = opt_d_ddd_fff_mul;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opc->v[5].o1 = sc->opts[sc->pc];
+          if (float_optimize(sc, cdddr(car_x)))
+            {
+              if (d_ddd_fff_combinable(sc, opc, start))
+                return_true(sc, car_x);
+              opc->v[0].fd = opt_d_ddd_fff; /* tfft: (* xout xin iw) (+ (* xout xin iw) (* yout yin ih) (* zout zin id)) */
+              opc->v[11].fd = opc->v[10].o1->v[0].fd;
+              opc->v[9].fd = opc->v[8].o1->v[0].fd;
+              opc->v[6].fd = opc->v[5].o1->v[0].fd;
+              if ((f == multiply_d_ddd) && (opc->v[11].fd == opt_D_s) && (opc->v[9].fd == opt_D_s) && (opc->v[6].fd == opt_d_s))
+                opc->v[0].fd = opt_d_ddd_fff_mul;
+              return_true(sc, car_x);
+            }}}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -61581,15 +61581,15 @@ static s7_double opt_d_7pid_sso(opt_info *o)
 static s7_double opt_d_7pid_ss_ss(opt_info *o)
 {
   return(o->v[4].d_7pid_f(o->sc, slot_value(o->v[1].p),
-			  integer(slot_value(o->v[2].p)),
-			  o->v[3].d_7pi_f(o->sc, slot_value(o->v[5].p), integer(slot_value(o->v[6].p)))));
+                          integer(slot_value(o->v[2].p)),
+                          o->v[3].d_7pi_f(o->sc, slot_value(o->v[5].p), integer(slot_value(o->v[6].p)))));
 }
 
 static s7_double opt_d_7pid_ssfo(opt_info *o)
 {
   s7_pointer fv = slot_value(o->v[1].p);
   return(o->v[4].d_7pid_f(o->sc, fv, integer(slot_value(o->v[2].p)),
-	    o->v[6].d_dd_f(o->v[5].d_7pi_f(o->sc, fv, integer(slot_value(o->v[3].p))), real(slot_value(o->v[8].p)))));
+            o->v[6].d_dd_f(o->v[5].d_7pi_f(o->sc, fv, integer(slot_value(o->v[3].p))), real(slot_value(o->v[8].p)))));
 }
 
 static s7_double opt_d_7pid_ssfo_fv(opt_info *o)
@@ -61628,40 +61628,40 @@ static bool d_7pid_ssf_combinable(s7_scheme *sc, opt_info *opc)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if (o1->v[0].fd == opt_d_v)
-	{
-	  opc->v[6].p = o1->v[1].p;
-	  opc->v[3].obj = o1->v[5].obj;
-	  opc->v[5].d_v_f = o1->v[3].d_v_f;
-	  opc->v[0].fd = opt_d_7pid_sso;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}
+        {
+          opc->v[6].p = o1->v[1].p;
+          opc->v[3].obj = o1->v[5].obj;
+          opc->v[5].d_v_f = o1->v[3].d_v_f;
+          opc->v[0].fd = opt_d_7pid_sso;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }
       if ((o1->v[0].fd == opt_d_7pi_ss) || (o1->v[0].fd == opt_d_7pi_ss_fvref) || (o1->v[0].fd == opt_d_7pi_ss_fvref_direct))
-	{
-	  opc->v[3].d_7pi_f = o1->v[3].d_7pi_f;
-	  opc->v[5].p = o1->v[1].p;
-	  opc->v[6].p = o1->v[2].p;
-	  opc->v[0].fd = opt_d_7pid_ss_ss;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}
+        {
+          opc->v[3].d_7pi_f = o1->v[3].d_7pi_f;
+          opc->v[5].p = o1->v[1].p;
+          opc->v[6].p = o1->v[2].p;
+          opc->v[0].fd = opt_d_7pid_ss_ss;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }
       if ((o1->v[0].fd == opt_d_dd_fso) &&
-	  (opc->v[1].p == o1->v[2].p))
-	{
-	  /* opc: pid_ssf: o->v[4].d_7pid_f(slot_value(o->v[1].p), integer(slot_value(o->v[2].p)), o1->v[0].fd(o1))
-	   * o1: d_dd_fso: o->v[4].d_dd_f(o->v[5].d_7pi_f(slot_value(o->v[2].p), integer(slot_value(o->v[3].p))), real(slot_value(o->v[1].p))))
-	   */
-	  opc->v[6].d_dd_f = o1->v[4].d_dd_f;
-	  opc->v[5].d_7pi_f = o1->v[5].d_7pi_f;
-	  opc->v[3].p = o1->v[3].p;
-	  opc->v[8].p = o1->v[1].p;
-	  opc->v[0].fd = opt_d_7pid_ssfo;
-	  if (((opc->v[5].d_7pi_f == float_vector_ref_d_7pi) || (opc->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
-	      ((opc->v[4].d_7pid_f == float_vector_set_d_7pid_direct) || (opc->v[4].d_7pid_f == float_vector_set_d_7pid)))
-	    opc->v[0].fd = opt_d_7pid_ssfo_fv; /* actually if either is *_d, we need to check the indices */
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+          (opc->v[1].p == o1->v[2].p))
+        {
+          /* opc: pid_ssf: o->v[4].d_7pid_f(slot_value(o->v[1].p), integer(slot_value(o->v[2].p)), o1->v[0].fd(o1))
+           * o1: d_dd_fso: o->v[4].d_dd_f(o->v[5].d_7pi_f(slot_value(o->v[2].p), integer(slot_value(o->v[3].p))), real(slot_value(o->v[1].p))))
+           */
+          opc->v[6].d_dd_f = o1->v[4].d_dd_f;
+          opc->v[5].d_7pi_f = o1->v[5].d_7pi_f;
+          opc->v[3].p = o1->v[3].p;
+          opc->v[8].p = o1->v[1].p;
+          opc->v[0].fd = opt_d_7pid_ssfo;
+          if (((opc->v[5].d_7pi_f == float_vector_ref_d_7pi) || (opc->v[5].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
+              ((opc->v[4].d_7pid_f == float_vector_set_d_7pid_direct) || (opc->v[4].d_7pid_f == float_vector_set_d_7pid)))
+            opc->v[0].fd = opt_d_7pid_ssfo_fv; /* actually if either is *_d, we need to check the indices */
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -61678,45 +61678,45 @@ static bool d_7pid_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointe
       opc->v[4].d_7pid_f = f;
 
       if (is_target_or_its_alias(head, s_func, sc->float_vector_set_symbol))
-	return(opt_float_vector_set(sc, opc, cadr(car_x), cddr(car_x), NULL, NULL, cdddr(car_x)));
+        return(opt_float_vector_set(sc, opc, cadr(car_x), cddr(car_x), NULL, NULL, cdddr(car_x)));
 
       opc->v[1].p = s7_slot(sc, cadr(car_x));
       opc->v[10].o1 = sc->opts[start];
       if (is_slot(opc->v[1].p))
-	{
-	  slot = opt_integer_symbol(sc, caddr(car_x));
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      slot = opt_float_symbol(sc, cadddr(car_x));
-	      if (slot)
-		{
-		  opc->v[3].p = slot;
-		  opc->v[0].fd = opt_d_7pid_sss;
-		  return_true(sc, car_x);
-		}
-	      if (float_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[11].fd = sc->opts[start]->v[0].fd;
-		  if (d_7pid_ssf_combinable(sc, opc))
-		    return_true(sc, car_x);
-		  opc->v[0].fd = opt_d_7pid_ssf;
-		  return_true(sc, car_x);
-		}
-	      sc->pc = start;
-	    }
-	  if (int_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (float_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[0].fd = opt_d_7pid_sff;
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[9].fd = opc->v[8].o1->v[0].fd;
-		  return_true(sc, car_x);
-		}}
-	  sc->pc = start;
-	}}
+        {
+          slot = opt_integer_symbol(sc, caddr(car_x));
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              slot = opt_float_symbol(sc, cadddr(car_x));
+              if (slot)
+                {
+                  opc->v[3].p = slot;
+                  opc->v[0].fd = opt_d_7pid_sss;
+                  return_true(sc, car_x);
+                }
+              if (float_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[11].fd = sc->opts[start]->v[0].fd;
+                  if (d_7pid_ssf_combinable(sc, opc))
+                    return_true(sc, car_x);
+                  opc->v[0].fd = opt_d_7pid_ssf;
+                  return_true(sc, car_x);
+                }
+              sc->pc = start;
+            }
+          if (int_optimize(sc, cddr(car_x)))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (float_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[0].fd = opt_d_7pid_sff;
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[9].fd = opc->v[8].o1->v[0].fd;
+                  return_true(sc, car_x);
+                }}
+          sc->pc = start;
+        }}
   return_false(sc, car_x);
 }
 
@@ -61754,42 +61754,42 @@ static bool d_7pii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointe
       int32_t start = sc->pc;
       opc->v[1].p = s7_slot(sc, cadr(car_x));
       if ((!is_slot(opc->v[1].p)) ||
-	  (!is_float_vector(slot_value(opc->v[1].p))) ||
-	  (vector_rank(slot_value(opc->v[1].p)) != 2))
-	return_false(sc, car_x);
+          (!is_float_vector(slot_value(opc->v[1].p))) ||
+          (vector_rank(slot_value(opc->v[1].p)) != 2))
+        return_false(sc, car_x);
 
       opc->v[4].d_7pii_f = ifunc; /* currently pointless */
       slot = opt_integer_symbol(sc, cadddr(car_x));
       if (slot)
-	{
-	  opc->v[3].p = slot;
-	  slot = opt_integer_symbol(sc, caddr(car_x));
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      opc->v[0].fd = opt_d_7pii_sss;
-	      if ((loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
-		  (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
-		opc->v[0].fd = opt_d_7pii_sss_unchecked;
-	      return_true(sc, car_x);
-	    }
-	  if (is_t_integer(caddr(car_x)))
-	    {
-	      opc->v[2].i = integer(caddr(car_x));
-	      opc->v[0].fd = opt_d_7pii_scs;
-	      return_true(sc, car_x);
-	    }}
+        {
+          opc->v[3].p = slot;
+          slot = opt_integer_symbol(sc, caddr(car_x));
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              opc->v[0].fd = opt_d_7pii_sss;
+              if ((loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
+                  (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
+                opc->v[0].fd = opt_d_7pii_sss_unchecked;
+              return_true(sc, car_x);
+            }
+          if (is_t_integer(caddr(car_x)))
+            {
+              opc->v[2].i = integer(caddr(car_x));
+              opc->v[0].fd = opt_d_7pii_scs;
+              return_true(sc, car_x);
+            }}
       opc->v[10].o1 = sc->opts[start];
       if (int_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[8].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdddr(car_x)))
-	    {
-	      opc->v[0].fd = opt_d_7pii_sff;
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      opc->v[9].fi = opc->v[8].o1->v[0].fi;
-	      return_true(sc, car_x);
-	    }}
+        {
+          opc->v[8].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cdddr(car_x)))
+            {
+              opc->v[0].fd = opt_d_7pii_sff;
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              opc->v[9].fi = opc->v[8].o1->v[0].fi;
+              return_true(sc, car_x);
+            }}
       sc->pc = start;
     }
   return_false(sc, car_x);
@@ -61837,7 +61837,7 @@ static bool d_7piid_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_point
     {
       opc->v[4].d_7piid_f = f;
       if (is_target_or_its_alias(car(car_x), s_func, sc->float_vector_set_symbol))
-	return(opt_float_vector_set(sc, opc, cadr(car_x), cddr(car_x), cdddr(car_x), NULL, cddddr(car_x)));
+        return(opt_float_vector_set(sc, opc, cadr(car_x), cddr(car_x), cdddr(car_x), NULL, cddddr(car_x)));
     }
   return_false(sc, car_x);
 }
@@ -61846,7 +61846,7 @@ static bool d_7piid_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_point
 static s7_double opt_d_7piii_ssss(opt_info *o)
 {
   return(float_vector_ref_d_7piii(o->sc, slot_value(o->v[1].p), integer(slot_value(o->v[2].p)),
-				  integer(slot_value(o->v[3].p)), integer(slot_value(o->v[5].p))));
+                                  integer(slot_value(o->v[3].p)), integer(slot_value(o->v[5].p))));
 }
 
 static s7_double opt_d_7piii_ssss_unchecked(opt_info *o)
@@ -61866,31 +61866,31 @@ static bool d_7piii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_point
       s7_pointer slot;
       opc->v[1].p = s7_slot(sc, cadr(car_x));
       if ((!is_slot(opc->v[1].p)) ||
-	  (!is_float_vector(slot_value(opc->v[1].p))) ||
-	  (vector_rank(slot_value(opc->v[1].p)) != 3))
-	return_false(sc, car_x);
+          (!is_float_vector(slot_value(opc->v[1].p))) ||
+          (vector_rank(slot_value(opc->v[1].p)) != 3))
+        return_false(sc, car_x);
 
       opc->v[4].d_7piii_f = ifunc; /* currently ignored */
       slot = opt_integer_symbol(sc, car(cddddr(car_x)));
       if (slot)
-	{
-	  opc->v[5].p = slot;
-	  slot = opt_integer_symbol(sc, cadddr(car_x));
-	  if (slot)
-	    {
-	      opc->v[3].p = slot;
-	      slot = opt_integer_symbol(sc, caddr(car_x));
-	      if (slot)
-		{
-		  s7_pointer vect = slot_value(opc->v[1].p);
-		  opc->v[2].p = slot;
-		  opc->v[0].fd = opt_d_7piii_ssss;
-		  if ((loop_end_fits(opc->v[2].p, vector_dimension(vect, 0))) &&
-		      (loop_end_fits(opc->v[3].p, vector_dimension(vect, 1))) &&
-		      (loop_end_fits(opc->v[5].p, vector_dimension(vect, 2))))
-		    opc->v[0].fd = opt_d_7piii_ssss_unchecked;
-		  return_true(sc, car_x);
-		}}}}
+        {
+          opc->v[5].p = slot;
+          slot = opt_integer_symbol(sc, cadddr(car_x));
+          if (slot)
+            {
+              opc->v[3].p = slot;
+              slot = opt_integer_symbol(sc, caddr(car_x));
+              if (slot)
+                {
+                  s7_pointer vect = slot_value(opc->v[1].p);
+                  opc->v[2].p = slot;
+                  opc->v[0].fd = opt_d_7piii_ssss;
+                  if ((loop_end_fits(opc->v[2].p, vector_dimension(vect, 0))) &&
+                      (loop_end_fits(opc->v[3].p, vector_dimension(vect, 1))) &&
+                      (loop_end_fits(opc->v[5].p, vector_dimension(vect, 2))))
+                    opc->v[0].fd = opt_d_7piii_ssss_unchecked;
+                  return_true(sc, car_x);
+                }}}}
   return_false(sc, car_x);
 }
 
@@ -61898,7 +61898,7 @@ static bool d_7piii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_point
 static s7_double opt_d_7piiid_ssssf(opt_info *o)
 {
   return(float_vector_set_d_7piiid(o->sc, slot_value(o->v[1].p), integer(slot_value(o->v[2].p)),
-				   integer(slot_value(o->v[3].p)), integer(slot_value(o->v[5].p)), o->v[11].fd(o->v[10].o1)));
+                                   integer(slot_value(o->v[3].p)), integer(slot_value(o->v[5].p)), o->v[11].fd(o->v[10].o1)));
 }
 
 static s7_double opt_d_7piiid_ssssf_unchecked(opt_info *o)
@@ -61920,7 +61920,7 @@ static bool d_7piiid_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_poin
     {
       opc->v[4].d_7piiid_f = f;
       if (is_target_or_its_alias(car(car_x), s_func, sc->float_vector_set_symbol))
-	return(opt_float_vector_set(sc, opc, cadr(car_x), cddr(car_x), cdddr(car_x), cddddr(car_x), cdr(cddddr(car_x))));
+        return(opt_float_vector_set(sc, opc, cadr(car_x), cddr(car_x), cdddr(car_x), cddddr(car_x), cdr(cddddr(car_x))));
     }
   return_false(sc, car_x);
 }
@@ -61935,138 +61935,138 @@ static bool opt_float_vector_set(s7_scheme *sc, opt_info *opc, s7_pointer v, s7_
       int32_t start = sc->pc;
       opc->v[1].p = settee;
       if (!is_float_vector(vect))
-	return_false(sc, NULL);
+        return_false(sc, NULL);
       opc->v[10].o1 = sc->opts[start];
       if ((!indexp2) &&
-	  (vector_rank(vect) == 1))
-	{
-	  opc->v[4].d_7pid_f = float_vector_set_d_7pid;
-	  slot = opt_integer_symbol(sc, car(indexp1));
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      if (loop_end_fits(opc->v[2].p, vector_length(vect)))
-		opc->v[4].d_7pid_f = float_vector_set_d_7pid_direct;
-	      slot = opt_float_symbol(sc, car(valp));
-	      if (slot)
-		{
-		  opc->v[3].p = slot;
-		  opc->v[0].fd = opt_d_7pid_sss;
-		  return_true(sc, NULL);
-		}
-	      if (is_small_real(car(valp)))
-		{
-		  opc->v[3].x = s7_real(car(valp));
-		  opc->v[0].fd = opt_d_7pid_ssc;
-		  return_true(sc, NULL);
-		}
-	      if (float_optimize(sc, valp))
-		{
-		  opc->v[11].fd = sc->opts[start]->v[0].fd;
-		  if (d_7pid_ssf_combinable(sc, opc))
-		    return_true(sc, NULL);
-		  opc->v[0].fd = opt_d_7pid_ssf;
-		  return_true(sc, NULL);
-		}
-	      sc->pc = start;
-	    }
-	  if (int_optimize(sc, indexp1))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (float_optimize(sc, valp))
-		{
-		  opc->v[0].fd = (opc->v[4].d_7pid_f == float_vector_set_d_7pid) ? opt_d_7pid_sff_fvset : opt_d_7pid_sff;
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[9].fd = opc->v[8].o1->v[0].fd;
-		  return_true(sc, NULL);
-		}}
-	  return_false(sc, NULL);
-	}
+          (vector_rank(vect) == 1))
+        {
+          opc->v[4].d_7pid_f = float_vector_set_d_7pid;
+          slot = opt_integer_symbol(sc, car(indexp1));
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              if (loop_end_fits(opc->v[2].p, vector_length(vect)))
+                opc->v[4].d_7pid_f = float_vector_set_d_7pid_direct;
+              slot = opt_float_symbol(sc, car(valp));
+              if (slot)
+                {
+                  opc->v[3].p = slot;
+                  opc->v[0].fd = opt_d_7pid_sss;
+                  return_true(sc, NULL);
+                }
+              if (is_small_real(car(valp)))
+                {
+                  opc->v[3].x = s7_real(car(valp));
+                  opc->v[0].fd = opt_d_7pid_ssc;
+                  return_true(sc, NULL);
+                }
+              if (float_optimize(sc, valp))
+                {
+                  opc->v[11].fd = sc->opts[start]->v[0].fd;
+                  if (d_7pid_ssf_combinable(sc, opc))
+                    return_true(sc, NULL);
+                  opc->v[0].fd = opt_d_7pid_ssf;
+                  return_true(sc, NULL);
+                }
+              sc->pc = start;
+            }
+          if (int_optimize(sc, indexp1))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (float_optimize(sc, valp))
+                {
+                  opc->v[0].fd = (opc->v[4].d_7pid_f == float_vector_set_d_7pid) ? opt_d_7pid_sff_fvset : opt_d_7pid_sff;
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[9].fd = opc->v[8].o1->v[0].fd;
+                  return_true(sc, NULL);
+                }}
+          return_false(sc, NULL);
+        }
       if ((indexp2) && (!indexp3) &&
-	  (vector_rank(vect) == 2))
-	{
-	  opc->v[5].d_7piid_f = float_vector_set_d_7piid;
-	  /* could check for loop_end/end-ok here for both indices, but the d_7pii* functions currently assume fv_d_7piid
-	   *    perhaps set a different fd? so opc->v[0].fd = fvset_unchecked_d_7piid or whatever
-	   */
-	  slot = opt_integer_symbol(sc, car(indexp2));
-	  if (slot)
-	    {
-	      opc->v[3].p = slot;
-	      if (is_t_integer(car(indexp1)))
-		{
-		  if (!float_optimize(sc, valp))
-		    return_false(sc, NULL);
-		  opc->v[0].fd = opt_d_7piid_scsf;
-		  opc->v[2].i = integer(car(indexp1));
-		  opc->v[11].fd = opc->v[10].o1->v[0].fd;
-		  return_true(sc, NULL);
-		}
-	      slot = opt_integer_symbol(sc, car(indexp1));
-	      if (slot)
-		{
-		  opc->v[2].p = slot;
-		  if (is_small_real(car(valp)))
-		    {
-		      opc->v[0].fd = opt_d_7piid_sssc;
-		      opc->v[4].x = s7_real(car(valp));
-		      return_true(sc, NULL);
-		    }
-		  opc->v[8].o1 = sc->opts[sc->pc];
-		  if (float_optimize(sc, valp))
-		    {
-		      opc->v[0].fd = opt_d_7piid_sssf;
-		      opc->v[9].fd = opc->v[8].o1->v[0].fd;
-
-		      if ((loop_end_fits(opc->v[2].p, vector_dimension(vect, 0))) &&
-			  (loop_end_fits(opc->v[3].p, vector_dimension(vect, 1))))
-			opc->v[0].fd = opt_d_7piid_sssf_unchecked;
-		      return_true(sc, NULL);
-		    }
-		  sc->pc = start;
-		}}
-	  if (int_optimize(sc, indexp1))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, indexp2))
-		{
-		  opc->v[3].o1 = sc->opts[sc->pc];
-		  if (float_optimize(sc, valp))
-		    {
-		      opc->v[0].fd = opt_d_7piid_sfff;
-		      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		      opc->v[9].fi = opc->v[8].o1->v[0].fi;
-		      opc->v[4].fd = opc->v[3].o1->v[0].fd;
-		      return_true(sc, NULL);
-		    }}}
-	  return_false(sc, NULL);
-	}
+          (vector_rank(vect) == 2))
+        {
+          opc->v[5].d_7piid_f = float_vector_set_d_7piid;
+          /* could check for loop_end/end-ok here for both indices, but the d_7pii* functions currently assume fv_d_7piid
+           *    perhaps set a different fd? so opc->v[0].fd = fvset_unchecked_d_7piid or whatever
+           */
+          slot = opt_integer_symbol(sc, car(indexp2));
+          if (slot)
+            {
+              opc->v[3].p = slot;
+              if (is_t_integer(car(indexp1)))
+                {
+                  if (!float_optimize(sc, valp))
+                    return_false(sc, NULL);
+                  opc->v[0].fd = opt_d_7piid_scsf;
+                  opc->v[2].i = integer(car(indexp1));
+                  opc->v[11].fd = opc->v[10].o1->v[0].fd;
+                  return_true(sc, NULL);
+                }
+              slot = opt_integer_symbol(sc, car(indexp1));
+              if (slot)
+                {
+                  opc->v[2].p = slot;
+                  if (is_small_real(car(valp)))
+                    {
+                      opc->v[0].fd = opt_d_7piid_sssc;
+                      opc->v[4].x = s7_real(car(valp));
+                      return_true(sc, NULL);
+                    }
+                  opc->v[8].o1 = sc->opts[sc->pc];
+                  if (float_optimize(sc, valp))
+                    {
+                      opc->v[0].fd = opt_d_7piid_sssf;
+                      opc->v[9].fd = opc->v[8].o1->v[0].fd;
+
+                      if ((loop_end_fits(opc->v[2].p, vector_dimension(vect, 0))) &&
+                          (loop_end_fits(opc->v[3].p, vector_dimension(vect, 1))))
+                        opc->v[0].fd = opt_d_7piid_sssf_unchecked;
+                      return_true(sc, NULL);
+                    }
+                  sc->pc = start;
+                }}
+          if (int_optimize(sc, indexp1))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, indexp2))
+                {
+                  opc->v[3].o1 = sc->opts[sc->pc];
+                  if (float_optimize(sc, valp))
+                    {
+                      opc->v[0].fd = opt_d_7piid_sfff;
+                      opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                      opc->v[9].fi = opc->v[8].o1->v[0].fi;
+                      opc->v[4].fd = opc->v[3].o1->v[0].fd;
+                      return_true(sc, NULL);
+                    }}}
+          return_false(sc, NULL);
+        }
       if ((indexp3) &&
-	  (vector_rank(vect) == 3))
-	{
-	  opc->v[4].d_7piiid_f = float_vector_set_d_7piiid;
-	  slot = opt_integer_symbol(sc, car(indexp3));
-	  if (slot)
-	    {
-	      opc->v[5].p = slot;
-	      slot = opt_integer_symbol(sc, car(indexp2));
-	      if (slot)
-		{
-		  opc->v[3].p = slot;
-		  slot = opt_integer_symbol(sc, car(indexp1));
-		  if (slot)
-		    {
-		      opc->v[2].p = slot;
-		      if (float_optimize(sc, valp))
-			{
-			  opc->v[0].fd = opt_d_7piiid_ssssf;
-			  opc->v[11].fd = sc->opts[start]->v[0].fd;
-			  if ((loop_end_fits(opc->v[2].p, vector_dimension(vect, 0))) &&
-			      (loop_end_fits(opc->v[3].p, vector_dimension(vect, 1))) &&
-			      (loop_end_fits(opc->v[5].p, vector_dimension(vect, 2))))
-			    opc->v[0].fd = opt_d_7piiid_ssssf_unchecked;
-			  return_true(sc, NULL);
-			}}}}}}
+          (vector_rank(vect) == 3))
+        {
+          opc->v[4].d_7piiid_f = float_vector_set_d_7piiid;
+          slot = opt_integer_symbol(sc, car(indexp3));
+          if (slot)
+            {
+              opc->v[5].p = slot;
+              slot = opt_integer_symbol(sc, car(indexp2));
+              if (slot)
+                {
+                  opc->v[3].p = slot;
+                  slot = opt_integer_symbol(sc, car(indexp1));
+                  if (slot)
+                    {
+                      opc->v[2].p = slot;
+                      if (float_optimize(sc, valp))
+                        {
+                          opc->v[0].fd = opt_d_7piiid_ssssf;
+                          opc->v[11].fd = sc->opts[start]->v[0].fd;
+                          if ((loop_end_fits(opc->v[2].p, vector_dimension(vect, 0))) &&
+                              (loop_end_fits(opc->v[3].p, vector_dimension(vect, 1))) &&
+                              (loop_end_fits(opc->v[5].p, vector_dimension(vect, 2))))
+                            opc->v[0].fd = opt_d_7piiid_ssssf_unchecked;
+                          return_true(sc, NULL);
+                        }}}}}}
   return_false(sc, NULL);
 }
 
@@ -62084,9 +62084,9 @@ static inline s7_double opt_fmv(opt_info *o)
   s7_double vib = real(slot_value(o2->v[2].p));
   s7_double index_env = o3->v[5].d_v_f(o3->v[1].obj);
   return(o->v[4].d_vid_f(o->v[5].obj,
-			 integer(slot_value(o->v[2].p)),
-			 amp_env * o2->v[3].d_vd_f(o2->v[5].obj,
-						   vib + (index_env * o3->v[6].d_vd_f(o3->v[2].obj, vib)))));
+                         integer(slot_value(o->v[2].p)),
+                         amp_env * o2->v[3].d_vd_f(o2->v[5].obj,
+                                                   vib + (index_env * o3->v[6].d_vd_f(o3->v[2].obj, vib)))));
 }
 
 static bool d_vid_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer car_x)
@@ -62097,47 +62097,47 @@ static bool d_vid_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       s7_pointer sig;
       s7_d_vid_t flt = s7_d_vid_function(s_func);
       if (!flt)
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       opc->v[4].d_vid_f = flt;
       sig = c_function_signature(s_func);
       if (is_pair(sig))
-	{
-	  int32_t start = sc->pc;
-	  s7_pointer vslot = opt_types_match(sc, cadr(sig), cadr(car_x));
-	  if (vslot)
-	    {
-	      s7_pointer slot;
-	      opc->v[0].fd = opt_d_vid_ssf;
-	      opc->v[1].p = vslot;
-	      opc->v[10].o1 = sc->opts[start];
-	      slot = opt_integer_symbol(sc, caddr(car_x));
-	      if ((slot) &&
-		  (float_optimize(sc, cdddr(car_x))))
-		{
-		  opt_info *o2;
-		  opc->v[2].p = slot;
-		  opc->v[5].obj = (void *)c_object_value(slot_value(vslot));
-		  opc->v[11].fd = opc->v[10].o1->v[0].fd;
-		  o2 = sc->opts[start];
-		  if (o2->v[0].fd == opt_d_dd_ff_mul1)
-		    {
-		      opt_info *o3 = sc->opts[start + 2];
-		      if (o3->v[0].fd == opt_d_vd_o1)
-			{
-			  opt_info *o1 = sc->opts[start + 4];
-			  if ((o1->v[0].fd == opt_d_dd_ff_o3) &&
-			      (o1->v[4].d_dd_f == multiply_d_dd) &&
-			      (o3->v[4].d_dd_f == add_d_dd))
-			    {
-			      opc->v[0].fd = opt_fmv; /* a placeholder -- see below */
-			      opc->v[12].o1 = o2;
-			      opc->v[13].o1 = o3;
-			      opc->v[14].o1 = o1;
-			    }}}
-		  return_true(sc, car_x);
-		}}
-	  sc->pc = start;
-	}}
+        {
+          int32_t start = sc->pc;
+          s7_pointer vslot = opt_types_match(sc, cadr(sig), cadr(car_x));
+          if (vslot)
+            {
+              s7_pointer slot;
+              opc->v[0].fd = opt_d_vid_ssf;
+              opc->v[1].p = vslot;
+              opc->v[10].o1 = sc->opts[start];
+              slot = opt_integer_symbol(sc, caddr(car_x));
+              if ((slot) &&
+                  (float_optimize(sc, cdddr(car_x))))
+                {
+                  opt_info *o2;
+                  opc->v[2].p = slot;
+                  opc->v[5].obj = (void *)c_object_value(slot_value(vslot));
+                  opc->v[11].fd = opc->v[10].o1->v[0].fd;
+                  o2 = sc->opts[start];
+                  if (o2->v[0].fd == opt_d_dd_ff_mul1)
+                    {
+                      opt_info *o3 = sc->opts[start + 2];
+                      if (o3->v[0].fd == opt_d_vd_o1)
+                        {
+                          opt_info *o1 = sc->opts[start + 4];
+                          if ((o1->v[0].fd == opt_d_dd_ff_o3) &&
+                              (o1->v[4].d_dd_f == multiply_d_dd) &&
+                              (o3->v[4].d_dd_f == add_d_dd))
+                            {
+                              opc->v[0].fd = opt_fmv; /* a placeholder -- see below */
+                              opc->v[12].o1 = o2;
+                              opc->v[13].o1 = o3;
+                              opc->v[14].o1 = o1;
+                            }}}
+                  return_true(sc, car_x);
+                }}
+          sc->pc = start;
+        }}
   return_false(sc, car_x);
 }
 
@@ -62157,26 +62157,26 @@ static bool d_vdd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       s7_pointer sig = c_function_signature(s_func);
       opc->v[4].d_vdd_f = flt;
       if (is_pair(sig))
-	{
-	  s7_pointer slot = opt_types_match(sc, cadr(sig), cadr(car_x));
-	  if (slot)
-	    {
-	      int32_t start = sc->pc;
-	      opc->v[10].o1 = sc->opts[start];
-	      if (float_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[8].o1 = sc->opts[sc->pc];
-		  if (float_optimize(sc, cdddr(car_x)))
-		    {
-		      opc->v[11].fd = opc->v[10].o1->v[0].fd;
-		      opc->v[9].fd = opc->v[8].o1->v[0].fd;
-		      opc->v[1].p = slot;
-		      opc->v[5].obj = (void *)c_object_value(slot_value(slot));
-		      opc->v[0].fd = opt_d_vdd_ff;
-		      return_true(sc, car_x);
-		    }}
-	      sc->pc = start;
-	    }}}
+        {
+          s7_pointer slot = opt_types_match(sc, cadr(sig), cadr(car_x));
+          if (slot)
+            {
+              int32_t start = sc->pc;
+              opc->v[10].o1 = sc->opts[start];
+              if (float_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[8].o1 = sc->opts[sc->pc];
+                  if (float_optimize(sc, cdddr(car_x)))
+                    {
+                      opc->v[11].fd = opc->v[10].o1->v[0].fd;
+                      opc->v[9].fd = opc->v[8].o1->v[0].fd;
+                      opc->v[1].p = slot;
+                      opc->v[5].obj = (void *)c_object_value(slot_value(slot));
+                      opc->v[0].fd = opt_d_vdd_ff;
+                      return_true(sc, car_x);
+                    }}
+              sc->pc = start;
+            }}}
   return_false(sc, car_x);
 }
 
@@ -62201,21 +62201,21 @@ static bool d_dddd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointe
     {
       opc->v[8].o1 = sc->opts[sc->pc];
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[4].o1 = sc->opts[sc->pc];
-	  if (float_optimize(sc, cdddr(car_x)))
-	    {
-	      opc->v[2].o1 = sc->opts[sc->pc];
-	      if (float_optimize(sc, cddddr(car_x)))
-		{
-		  opc->v[1].d_dddd_f = f;
-		  opc->v[0].fd = opt_d_dddd_ffff;
-		  opc->v[11].fd = opc->v[10].o1->v[0].fd;
-		  opc->v[9].fd = opc->v[8].o1->v[0].fd;
-		  opc->v[5].fd = opc->v[4].o1->v[0].fd;
-		  opc->v[3].fd = opc->v[2].o1->v[0].fd;
-		  return_true(sc, car_x);
-		}}}}
+        {
+          opc->v[4].o1 = sc->opts[sc->pc];
+          if (float_optimize(sc, cdddr(car_x)))
+            {
+              opc->v[2].o1 = sc->opts[sc->pc];
+              if (float_optimize(sc, cddddr(car_x)))
+                {
+                  opc->v[1].d_dddd_f = f;
+                  opc->v[0].fd = opt_d_dddd_ffff;
+                  opc->v[11].fd = opc->v[10].o1->v[0].fd;
+                  opc->v[9].fd = opc->v[8].o1->v[0].fd;
+                  opc->v[5].fd = opc->v[4].o1->v[0].fd;
+                  opc->v[3].fd = opc->v[2].o1->v[0].fd;
+                  return_true(sc, car_x);
+                }}}}
   return_false(sc, car_x);
 }
 
@@ -62252,17 +62252,17 @@ static bool d_add_any_ok(s7_scheme *sc, opt_info *opc, s7_pointer car_x)
       s7_pointer p;
       int32_t cur_len;
       for (cur_len = 0, p = cdr(car_x); (is_pair(p)) && (cur_len < 12); p = cdr(p), cur_len++)
-	{
-	  opc->v[cur_len + 2].o1 = sc->opts[sc->pc];
-	  if (!float_optimize(sc, p))
-	    break;
-	}
+        {
+          opc->v[cur_len + 2].o1 = sc->opts[sc->pc];
+          if (!float_optimize(sc, p))
+            break;
+        }
       if (is_null(p))
-	{
-	  opc->v[1].i = cur_len;
-	  opc->v[0].fd = (head == sc->add_symbol) ? opt_d_add_any_f : opt_d_multiply_any_f;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[1].i = cur_len;
+          opc->v[0].fd = (head == sc->add_symbol) ? opt_d_add_any_f : opt_d_multiply_any_f;
+          return_true(sc, car_x);
+        }}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -62292,46 +62292,46 @@ static bool d_syntax_ok(s7_scheme *sc, s7_pointer car_x, int32_t len)
       s7_pointer arg1 = cadr(car_x);
       opt_info *opc = alloc_opt_info(sc);
       if (is_symbol(arg1))
-	{
-	  s7_pointer settee;
-	  if (is_immutable(arg1))
-	    return_false(sc, car_x);
-	  settee = s7_slot(sc, arg1);
-	  if ((is_slot(settee)) &&
-	      (is_t_real(slot_value(settee))) &&
-	      (!is_immutable_slot(settee)) &&
-	      ((!slot_has_setter(settee)) ||
-	       ((is_c_function(slot_setter(settee))) &&
-		((slot_setter(settee) == initial_value(sc->is_float_symbol)) ||
-		 (c_function_call(slot_setter(settee)) == b_is_float_setter)))))
-	    {
-	      opt_info *o1 = sc->opts[sc->pc];
-	      opc->v[1].p = settee;
-	      if ((!is_t_integer(caddr(car_x))) &&
-		  (float_optimize(sc, cddr(car_x))))
-		{ /* tari: (set! rlo (min rlo (real-part (v i)))) -- can't tell here that it is used only in this line in the do body */
-		  /*  PERHAPS: if tree_count(body) - tree_count(line) == 0 and no setters within line it's safe as mutable? use the two_sets bit as before? */
-		  /*   but we also need a list of such opt_info ptrs to cancel mutability at the end */
-		  /* tall: (set! la ca)! (How?)
-		   *       (set! temp1 (one-zero dryTap0 (one-pole dryTap1 (piano-noise pnoise amp))))
-		   *   and many more, but none will be self-contained I think
-		   */
-		  opc->v[0].fd = (is_mutable_number(slot_value(opc->v[1].p))) ? opt_set_d_d_fm : opt_set_d_d_f;
-		  /* if (opc->v[0].fd == opt_set_d_d_f) fprintf(stderr, "%d: %s\n", __LINE__, display(car_x)); */
-		  opc->v[2].o1 = o1;
-		  opc->v[3].fd = o1->v[0].fd;
-		  return_true(sc, car_x);
-		}}}
+        {
+          s7_pointer settee;
+          if (is_immutable(arg1))
+            return_false(sc, car_x);
+          settee = s7_slot(sc, arg1);
+          if ((is_slot(settee)) &&
+              (is_t_real(slot_value(settee))) &&
+              (!is_immutable_slot(settee)) &&
+              ((!slot_has_setter(settee)) ||
+               ((is_c_function(slot_setter(settee))) &&
+                ((slot_setter(settee) == initial_value(sc->is_float_symbol)) ||
+                 (c_function_call(slot_setter(settee)) == b_is_float_setter)))))
+            {
+              opt_info *o1 = sc->opts[sc->pc];
+              opc->v[1].p = settee;
+              if ((!is_t_integer(caddr(car_x))) &&
+                  (float_optimize(sc, cddr(car_x))))
+                { /* tari: (set! rlo (min rlo (real-part (v i)))) -- can't tell here that it is used only in this line in the do body */
+                  /*  PERHAPS: if tree_count(body) - tree_count(line) == 0 and no setters within line it's safe as mutable? use the two_sets bit as before? */
+                  /*   but we also need a list of such opt_info ptrs to cancel mutability at the end */
+                  /* tall: (set! la ca)! (How?)
+                   *       (set! temp1 (one-zero dryTap0 (one-pole dryTap1 (piano-noise pnoise amp))))
+                   *   and many more, but none will be self-contained I think
+                   */
+                  opc->v[0].fd = (is_mutable_number(slot_value(opc->v[1].p))) ? opt_set_d_d_fm : opt_set_d_d_f;
+                  /* if (opc->v[0].fd == opt_set_d_d_f) fprintf(stderr, "%d: %s\n", __LINE__, display(car_x)); */
+                  opc->v[2].o1 = o1;
+                  opc->v[3].fd = o1->v[0].fd;
+                  return_true(sc, car_x);
+                }}}
       else /* if is_pair(settee) get setter */
-	if ((is_pair(arg1)) &&
-	    (is_symbol(car(arg1))) &&
-	    (is_pair(cdr(arg1))))
-	  {
-	    if (is_null(cddr(arg1)))
-	      return(opt_float_vector_set(sc, opc, car(arg1), cdr(arg1), NULL, NULL, cddr(car_x)));
-	    if (is_null(cdddr(arg1)))
-	      return(opt_float_vector_set(sc, opc, car(arg1), cdr(arg1), cddr(arg1), NULL, cddr(car_x)));
-	  }}
+        if ((is_pair(arg1)) &&
+            (is_symbol(car(arg1))) &&
+            (is_pair(cdr(arg1))))
+          {
+            if (is_null(cddr(arg1)))
+              return(opt_float_vector_set(sc, opc, car(arg1), cdr(arg1), NULL, NULL, cddr(car_x)));
+            if (is_null(cdddr(arg1)))
+              return(opt_float_vector_set(sc, opc, car(arg1), cdr(arg1), cddr(arg1), NULL, cddr(car_x)));
+          }}
   return_false(sc, car_x);
 }
 
@@ -62342,110 +62342,110 @@ static bool d_implicit_ok(s7_scheme *sc, s7_pointer s_slot, s7_pointer car_x, in
     {
       /* implicit float-vector-ref */
       if ((len == 2) &&
-	  (vector_rank(obj) == 1))
-	{
-	  opt_info *opc = alloc_opt_info(sc);
-	  opc->v[1].p = s_slot;
-	  opc->v[3].d_7pi_f = float_vector_ref_d_7pi;
-	  slot = opt_integer_symbol(sc, cadr(car_x));
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      if (loop_end_fits(opc->v[2].p, vector_length(obj)))
-		opc->v[0].fd = opt_d_7pi_ss_fvref_direct;
-	      else opc->v[0].fd = opt_d_7pi_ss_fvref;
-	      return_true(sc, car_x);
-	    }
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (!int_optimize(sc, cdr(car_x)))
-	    return_false(sc, car_x);
-	  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	  opc->v[0].fd = opt_d_7pi_sf;
-	  return_true(sc, car_x);
-	}
+          (vector_rank(obj) == 1))
+        {
+          opt_info *opc = alloc_opt_info(sc);
+          opc->v[1].p = s_slot;
+          opc->v[3].d_7pi_f = float_vector_ref_d_7pi;
+          slot = opt_integer_symbol(sc, cadr(car_x));
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              if (loop_end_fits(opc->v[2].p, vector_length(obj)))
+                opc->v[0].fd = opt_d_7pi_ss_fvref_direct;
+              else opc->v[0].fd = opt_d_7pi_ss_fvref;
+              return_true(sc, car_x);
+            }
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (!int_optimize(sc, cdr(car_x)))
+            return_false(sc, car_x);
+          opc->v[11].fi = opc->v[10].o1->v[0].fi;
+          opc->v[0].fd = opt_d_7pi_sf;
+          return_true(sc, car_x);
+        }
       if ((len == 3) &&
-	  (vector_rank(obj) == 2))
-	{
-	  opt_info *opc = alloc_opt_info(sc);
-	  opc->v[1].p = s_slot;
-	  opc->v[4].d_7pii_f = float_vector_ref_d_7pii;
-	  slot = opt_integer_symbol(sc, cadr(car_x));
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      slot = opt_integer_symbol(sc, caddr(car_x));
-	      if (slot)
-		{
-		  opc->v[3].p = slot;
-		  opc->v[0].fd = opt_d_7pii_sss;
-		  if ((loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
-		      (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
-		    opc->v[0].fd = opt_d_7pii_sss_unchecked;
-		  return_true(sc, car_x);
-		}}
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdr(car_x)))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[0].fd = opt_d_7pii_sff;
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[9].fi = opc->v[8].o1->v[0].fi;
-		  return_true(sc, car_x);
-		}}}
+          (vector_rank(obj) == 2))
+        {
+          opt_info *opc = alloc_opt_info(sc);
+          opc->v[1].p = s_slot;
+          opc->v[4].d_7pii_f = float_vector_ref_d_7pii;
+          slot = opt_integer_symbol(sc, cadr(car_x));
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              slot = opt_integer_symbol(sc, caddr(car_x));
+              if (slot)
+                {
+                  opc->v[3].p = slot;
+                  opc->v[0].fd = opt_d_7pii_sss;
+                  if ((loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
+                      (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
+                    opc->v[0].fd = opt_d_7pii_sss_unchecked;
+                  return_true(sc, car_x);
+                }}
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cdr(car_x)))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[0].fd = opt_d_7pii_sff;
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[9].fi = opc->v[8].o1->v[0].fi;
+                  return_true(sc, car_x);
+                }}}
       if ((len == 4) &&
-	  (vector_rank(obj) == 3))
-	{
-	  opt_info *opc = alloc_opt_info(sc);
-	  opc->v[1].p = s_slot;
-	  opc->v[4].d_7piii_f = float_vector_ref_d_7piii;
-	  slot = opt_integer_symbol(sc, cadr(car_x));
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      slot = opt_integer_symbol(sc, caddr(car_x));
-	      if (slot)
-		{
-		  opc->v[3].p = slot;
-		  slot = opt_integer_symbol(sc, cadddr(car_x));
-		  if (slot)
-		    {
-		      opc->v[5].p = slot;
-		      opc->v[0].fd = opt_d_7piii_ssss;
-		      if ((loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
-			  (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))) &&
-			  (loop_end_fits(opc->v[5].p, vector_dimension(obj, 2))))
-			opc->v[0].fd = opt_d_7piii_ssss_unchecked;
-		      return_true(sc, car_x);
-		    }}}}}
+          (vector_rank(obj) == 3))
+        {
+          opt_info *opc = alloc_opt_info(sc);
+          opc->v[1].p = s_slot;
+          opc->v[4].d_7piii_f = float_vector_ref_d_7piii;
+          slot = opt_integer_symbol(sc, cadr(car_x));
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              slot = opt_integer_symbol(sc, caddr(car_x));
+              if (slot)
+                {
+                  opc->v[3].p = slot;
+                  slot = opt_integer_symbol(sc, cadddr(car_x));
+                  if (slot)
+                    {
+                      opc->v[5].p = slot;
+                      opc->v[0].fd = opt_d_7piii_ssss;
+                      if ((loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
+                          (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))) &&
+                          (loop_end_fits(opc->v[5].p, vector_dimension(obj, 2))))
+                        opc->v[0].fd = opt_d_7piii_ssss_unchecked;
+                      return_true(sc, car_x);
+                    }}}}}
   if ((is_c_object(obj)) &&
       (len == 2))
     {
       s7_pointer getf = c_object_getf(sc, obj);
       if (is_c_function(getf)) /* default is #f */
-	{
-	  s7_d_7pi_t func = s7_d_7pi_function(getf);
-	  if (func)
-	    {
-	      opt_info *opc = alloc_opt_info(sc);
-	      opc->v[1].p = s_slot;
-	      opc->v[4].obj = (void *)c_object_value(obj);
-	      opc->v[3].d_7pi_f = func;
-	      slot = opt_integer_symbol(sc, cadr(car_x));
-	      if (slot)
-		{
-		  opc->v[0].fd = opt_d_7pi_ss;
-		  opc->v[2].p = slot;
-		  return_true(sc, car_x);
-		}
-	      opc->v[10].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, cdr(car_x)))
-		{
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[0].fd = opt_d_7pi_sf;
-		  return_true(sc, car_x);
-		}}}}
+        {
+          s7_d_7pi_t func = s7_d_7pi_function(getf);
+          if (func)
+            {
+              opt_info *opc = alloc_opt_info(sc);
+              opc->v[1].p = s_slot;
+              opc->v[4].obj = (void *)c_object_value(obj);
+              opc->v[3].d_7pi_f = func;
+              slot = opt_integer_symbol(sc, cadr(car_x));
+              if (slot)
+                {
+                  opc->v[0].fd = opt_d_7pi_ss;
+                  opc->v[2].p = slot;
+                  return_true(sc, car_x);
+                }
+              opc->v[10].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, cdr(car_x)))
+                {
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[0].fd = opt_d_7pi_sf;
+                  return_true(sc, car_x);
+                }}}}
   return_false(sc, car_x);
 }
 
@@ -62504,52 +62504,52 @@ static bool b_idp_ok(s7_scheme *sc, s7_pointer s_func, s7_pointer car_x, const s
     {
       s7_b_i_t bif = s7_b_i_function(s_func);
       if (bif)
-	{
-	  opc->v[2].b_i_f = bif;
-	  if (is_symbol(cadr(car_x)))
-	    {
-	      opc->v[1].p = s7_slot(sc, cadr(car_x));
-	      opc->v[0].fb = opt_b_i_s;
-	      return_true(sc, car_x);
-	    }
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdr(car_x)))
-	    {
-	      opt_info *o1 = sc->opts[sc->pc - 1];
-	      if ((car(car_x) == sc->is_zero_symbol) &&
-		  (o1->v[0].fi == opt_i_ii_sc) &&
-		  (o1->v[3].i_ii_f == modulo_i_ii_unchecked))
-		{
-		  opc->v[0].fb = opt_zero_mod;
-		  opc->v[1].p = o1->v[1].p;
-		  opc->v[2].i = o1->v[2].i;
-		  backup_pc(sc);
-		  return_true(sc, car_x);
-		}
-	      opc->v[0].fb = opt_b_i_f;
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opc->v[2].b_i_f = bif;
+          if (is_symbol(cadr(car_x)))
+            {
+              opc->v[1].p = s7_slot(sc, cadr(car_x));
+              opc->v[0].fb = opt_b_i_s;
+              return_true(sc, car_x);
+            }
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cdr(car_x)))
+            {
+              opt_info *o1 = sc->opts[sc->pc - 1];
+              if ((car(car_x) == sc->is_zero_symbol) &&
+                  (o1->v[0].fi == opt_i_ii_sc) &&
+                  (o1->v[3].i_ii_f == modulo_i_ii_unchecked))
+                {
+                  opc->v[0].fb = opt_zero_mod;
+                  opc->v[1].p = o1->v[1].p;
+                  opc->v[2].i = o1->v[2].i;
+                  backup_pc(sc);
+                  return_true(sc, car_x);
+                }
+              opc->v[0].fb = opt_b_i_f;
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              return_true(sc, car_x);
+            }}}
   else
     if (arg_type == sc->is_float_symbol)
       {
-	s7_b_d_t bdf = s7_b_d_function(s_func);
-	if (bdf)
-	  {
-	    opc->v[2].b_d_f = bdf;
-	    if (is_symbol(cadr(car_x)))
-	      {
-		opc->v[1].p = s7_slot(sc, cadr(car_x));
-		opc->v[0].fb = (bdf == is_positive_d) ? opt_b_d_s_is_positive : opt_b_d_s;
-		return_true(sc, car_x);
-	      }
-	    opc->v[10].o1 = sc->opts[sc->pc];
-	    if (float_optimize(sc, cdr(car_x)))
-	      {
-		opc->v[0].fb = opt_b_d_f;
-		opc->v[11].fd = opc->v[10].o1->v[0].fd;
-		return_true(sc, car_x);
-	      }}}
+        s7_b_d_t bdf = s7_b_d_function(s_func);
+        if (bdf)
+          {
+            opc->v[2].b_d_f = bdf;
+            if (is_symbol(cadr(car_x)))
+              {
+                opc->v[1].p = s7_slot(sc, cadr(car_x));
+                opc->v[0].fb = (bdf == is_positive_d) ? opt_b_d_s_is_positive : opt_b_d_s;
+                return_true(sc, car_x);
+              }
+            opc->v[10].o1 = sc->opts[sc->pc];
+            if (float_optimize(sc, cdr(car_x)))
+              {
+                opc->v[0].fb = opt_b_d_f;
+                opc->v[11].fd = opc->v[10].o1->v[0].fd;
+                return_true(sc, car_x);
+              }}}
   sc->pc = cur_index;
 
   bpf = s7_b_p_function(s_func);
@@ -62557,25 +62557,25 @@ static bool b_idp_ok(s7_scheme *sc, s7_pointer s_func, s7_pointer car_x, const s
   if ((bpf) || (bpf7))
     {
       if (bpf)
-	opc->v[2].b_p_f = bpf;
+        opc->v[2].b_p_f = bpf;
       else opc->v[2].b_7p_f = bpf7;
       if (is_symbol(cadr(car_x)))
-	{
-	  s7_pointer p = opt_simple_symbol(sc, cadr(car_x));
-	  if (!p) return_false(sc, car_x);
-	  opc->v[1].p = p;
- 	  opc->v[0].fb = (bpf) ? ((bpf == s7_is_integer) ? opt_b_p_s_is_integer : ((bpf == s7_is_pair) ? opt_b_p_s_is_pair : opt_b_p_s)) :
-	                         (((bpf7 == iterator_is_at_end_b_7p) && (is_iterator(slot_value(p)))) ? opt_b_7p_s_iter_at_end :
-				  ((bpf7 == not_b_7p) ? opt_b_7p_s_not : opt_b_7p_s));
-	  return_true(sc, car_x);
-	}
+        {
+          s7_pointer p = opt_simple_symbol(sc, cadr(car_x));
+          if (!p) return_false(sc, car_x);
+          opc->v[1].p = p;
+           opc->v[0].fb = (bpf) ? ((bpf == s7_is_integer) ? opt_b_p_s_is_integer : ((bpf == s7_is_pair) ? opt_b_p_s_is_pair : opt_b_p_s)) :
+                                 (((bpf7 == iterator_is_at_end_b_7p) && (is_iterator(slot_value(p)))) ? opt_b_7p_s_iter_at_end :
+                                  ((bpf7 == not_b_7p) ? opt_b_7p_s_not : opt_b_7p_s));
+          return_true(sc, car_x);
+        }
       opc->v[3].o1 = sc->opts[sc->pc];
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[0].fb = (bpf) ? ((bpf == s7_is_string) ? opt_b_p_f_is_string : opt_b_p_f) : (bpf7 == not_b_7p) ? opt_b_7p_f_not : opt_b_7p_f;
-	  opc->v[4].fp = opc->v[3].o1->v[0].fp;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[0].fb = (bpf) ? ((bpf == s7_is_string) ? opt_b_p_f_is_string : opt_b_p_f) : (bpf7 == not_b_7p) ? opt_b_7p_f_not : opt_b_7p_f;
+          opc->v[4].fp = opc->v[3].o1->v[0].fp;
+          return_true(sc, car_x);
+        }}
   return_false(sc, car_x);
 }
 
@@ -62587,86 +62587,86 @@ static s7_pointer opt_arg_type(s7_scheme *sc, s7_pointer argp)
   if (is_pair(arg))
     {
       if (is_symbol(car(arg)))
-	{
-	  if ((is_global(car(arg))) ||
-	      ((is_slot(global_slot(car(arg)))) &&
-	       (s7_slot(sc, car(arg)) == global_slot(car(arg)))))
-	    {
-	      s7_pointer a_func = global_value(car(arg));
-	      if (is_c_function(a_func))
-		{
-		  s7_pointer sig = c_function_signature(a_func);
-		  if (is_pair(sig))
-		    {
-		      if ((car(sig) == sc->is_integer_symbol) ||
-			  ((is_pair(car(sig))) && (direct_memq(sc->is_integer_symbol, car(sig))))) /* multidim vector for example with too few indices */
-			return(sc->is_integer_symbol);
-		      if ((car(sig) == sc->is_float_symbol) ||
-			  ((is_pair(car(sig))) && (direct_memq(sc->is_float_symbol, car(sig)))))
-			return(sc->is_float_symbol);
-		      if ((car(sig) == sc->is_byte_symbol) ||
-			  ((is_pair(car(sig))) && (direct_memq(sc->is_byte_symbol, car(sig)))))
-			return(sc->is_integer_symbol);  /* or '(integer? byte)? */
-		      if ((car(sig) == sc->is_real_symbol) ||
-			  (car(sig) == sc->is_number_symbol))
-			{
-			  int32_t start = sc->pc;
-			  if (int_optimize(sc, argp))
-			    {
-			      sc->pc = start;
-			      return(sc->is_integer_symbol);
-			    }
-			  if (float_optimize(sc, argp))
-			    {
-			      sc->pc = start;
-			      return(sc->is_float_symbol);
-			    }
-			  sc->pc = start;
-			}
-
- 		      if (((car(arg) == sc->vector_ref_symbol) || (car(arg) == sc->hash_table_ref_symbol)) &&
-			  (is_pair(cdr(arg))) && (is_normal_symbol(cadr(arg)))) /* (vector-ref) -> is_pair check */
-			{
-			  s7_pointer v_slot = s7_slot(sc, cadr(arg)); /* (vector-ref not-a-var ...) -> is_slot check, not #<undefined> */
-			  if (is_slot(v_slot))
-			    {
-			      s7_pointer v = slot_value(v_slot);
-			      if (car(arg) == sc->vector_ref_symbol)
-				{
-				  if (is_int_vector(v))	    return(sc->is_integer_symbol);
-				  if (is_float_vector(v))   return(sc->is_float_symbol);
-				  if (is_byte_vector(v))    return(sc->is_byte_symbol);
-				  if (is_typed_t_vector(v)) return(typed_vector_typer_symbol(sc, v)); /* includes closure name ?? */
-				}
-			      else
-				if ((is_hash_table(v)) && (is_typed_hash_table(v)) && (is_c_function(hash_table_value_typer(v))))
-				  return(c_function_symbol(hash_table_value_typer(v)));
-			    }}
-		      return(car(sig)); /* we want the function's return type in this context */
-		    }
-		  return(sc->T);
-		}
-	      if ((is_quote(car(arg))) && (is_pair(cdr(arg))))
-		return(s7_type_of(sc, cadr(arg)));
-	    }
-	  slot = s7_slot(sc, car(arg));
-	  if ((is_slot(slot)) &&
-	      (is_sequence(slot_value(slot))))
-	    {
-	      s7_pointer sig = s7_signature(sc, slot_value(slot));
-	      if (is_pair(sig))
-		return(car(sig));
-	    }}
+        {
+          if ((is_global(car(arg))) ||
+              ((is_slot(global_slot(car(arg)))) &&
+               (s7_slot(sc, car(arg)) == global_slot(car(arg)))))
+            {
+              s7_pointer a_func = global_value(car(arg));
+              if (is_c_function(a_func))
+                {
+                  s7_pointer sig = c_function_signature(a_func);
+                  if (is_pair(sig))
+                    {
+                      if ((car(sig) == sc->is_integer_symbol) ||
+                          ((is_pair(car(sig))) && (direct_memq(sc->is_integer_symbol, car(sig))))) /* multidim vector for example with too few indices */
+                        return(sc->is_integer_symbol);
+                      if ((car(sig) == sc->is_float_symbol) ||
+                          ((is_pair(car(sig))) && (direct_memq(sc->is_float_symbol, car(sig)))))
+                        return(sc->is_float_symbol);
+                      if ((car(sig) == sc->is_byte_symbol) ||
+                          ((is_pair(car(sig))) && (direct_memq(sc->is_byte_symbol, car(sig)))))
+                        return(sc->is_integer_symbol);  /* or '(integer? byte)? */
+                      if ((car(sig) == sc->is_real_symbol) ||
+                          (car(sig) == sc->is_number_symbol))
+                        {
+                          int32_t start = sc->pc;
+                          if (int_optimize(sc, argp))
+                            {
+                              sc->pc = start;
+                              return(sc->is_integer_symbol);
+                            }
+                          if (float_optimize(sc, argp))
+                            {
+                              sc->pc = start;
+                              return(sc->is_float_symbol);
+                            }
+                          sc->pc = start;
+                        }
+
+                       if (((car(arg) == sc->vector_ref_symbol) || (car(arg) == sc->hash_table_ref_symbol)) &&
+                          (is_pair(cdr(arg))) && (is_normal_symbol(cadr(arg)))) /* (vector-ref) -> is_pair check */
+                        {
+                          s7_pointer v_slot = s7_slot(sc, cadr(arg)); /* (vector-ref not-a-var ...) -> is_slot check, not #<undefined> */
+                          if (is_slot(v_slot))
+                            {
+                              s7_pointer v = slot_value(v_slot);
+                              if (car(arg) == sc->vector_ref_symbol)
+                                {
+                                  if (is_int_vector(v))            return(sc->is_integer_symbol);
+                                  if (is_float_vector(v))   return(sc->is_float_symbol);
+                                  if (is_byte_vector(v))    return(sc->is_byte_symbol);
+                                  if (is_typed_t_vector(v)) return(typed_vector_typer_symbol(sc, v)); /* includes closure name ?? */
+                                }
+                              else
+                                if ((is_hash_table(v)) && (is_typed_hash_table(v)) && (is_c_function(hash_table_value_typer(v))))
+                                  return(c_function_symbol(hash_table_value_typer(v)));
+                            }}
+                      return(car(sig)); /* we want the function's return type in this context */
+                    }
+                  return(sc->T);
+                }
+              if ((is_quote(car(arg))) && (is_pair(cdr(arg))))
+                return(s7_type_of(sc, cadr(arg)));
+            }
+          slot = s7_slot(sc, car(arg));
+          if ((is_slot(slot)) &&
+              (is_sequence(slot_value(slot))))
+            {
+              s7_pointer sig = s7_signature(sc, slot_value(slot));
+              if (is_pair(sig))
+                return(car(sig));
+            }}
       else
-	if ((car(arg) == sc->quote_function) && (is_pair(cdr(arg))))
-	  return(s7_type_of(sc, cadr(arg)));
-	else
-	  if (is_c_function(car(arg)))
-	    {
-	      s7_pointer sig = c_function_signature(car(arg));
-	      if (is_pair(sig))
-		return(car(sig));
-	    }
+        if ((car(arg) == sc->quote_function) && (is_pair(cdr(arg))))
+          return(s7_type_of(sc, cadr(arg)));
+        else
+          if (is_c_function(car(arg)))
+            {
+              s7_pointer sig = c_function_signature(car(arg));
+              if (is_pair(sig))
+                return(car(sig));
+            }
       return(sc->T);
     }
   if (is_symbol(arg))
@@ -62675,13 +62675,13 @@ static s7_pointer opt_arg_type(s7_scheme *sc, s7_pointer argp)
       if (!slot) return(sc->T);
 #if WITH_GMP
       if (is_big_number(slot_value(slot)))
-	return(sc->T);
+        return(sc->T);
       if ((is_t_integer(slot_value(slot))) &&
-	  (integer(slot_value(slot)) > QUOTIENT_INT_LIMIT))
-	return(sc->T);
+          (integer(slot_value(slot)) > QUOTIENT_INT_LIMIT))
+        return(sc->T);
       if ((is_t_real(slot_value(slot))) &&
-	  (real(slot_value(slot)) > QUOTIENT_FLOAT_LIMIT))
-	return(sc->T);
+          (real(slot_value(slot)) > QUOTIENT_FLOAT_LIMIT))
+        return(sc->T);
 #endif
       return(s7_type_of(sc, slot_value(slot)));
     }
@@ -62745,20 +62745,20 @@ static bool b_pp_sf_combinable(s7_scheme *sc, opt_info *opc, bool bpf_case)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if (o1->v[0].fp == opt_p_p_s)
-	{
-	  opc->v[2].p = o1->v[1].p;
-	  opc->v[4].p_p_f = o1->v[2].p_p_f;
-	  if (bpf_case)
-	    opc->v[0].fb = opt_b_pp_sfo;
-	  else
-	    if (opc->v[4].p_p_f == car_p_p)
-	      opc->v[0].fb = ((opc->v[3].b_7pp_f == s7_is_equal) ? opt_car_equal_sf :
-			      ((opc->v[3].b_7pp_f == s7_is_equivalent) ? opt_car_equivalent_sf : opt_b_7pp_car_sf));
-	    else opc->v[0].fb = ((opc->v[3].b_7pp_f == s7_is_equal) ? opt_is_equal_sfo :
-				 ((opc->v[3].b_7pp_f == s7_is_equivalent) ? opt_is_equivalent_sfo : opt_b_7pp_sfo));
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[2].p = o1->v[1].p;
+          opc->v[4].p_p_f = o1->v[2].p_p_f;
+          if (bpf_case)
+            opc->v[0].fb = opt_b_pp_sfo;
+          else
+            if (opc->v[4].p_p_f == car_p_p)
+              opc->v[0].fb = ((opc->v[3].b_7pp_f == s7_is_equal) ? opt_car_equal_sf :
+                              ((opc->v[3].b_7pp_f == s7_is_equivalent) ? opt_car_equivalent_sf : opt_b_7pp_car_sf));
+            else opc->v[0].fb = ((opc->v[3].b_7pp_f == s7_is_equal) ? opt_is_equal_sfo :
+                                 ((opc->v[3].b_7pp_f == s7_is_equivalent) ? opt_is_equivalent_sfo : opt_b_7pp_sfo));
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -62797,16 +62797,16 @@ static bool b_pp_ff_combinable(s7_scheme *sc, opt_info *opc, bool bpf_case)
     {
       opt_info *o1 = sc->opts[sc->pc - 2], *o2 = sc->opts[sc->pc - 1];
       if ((o1->v[0].fp == opt_p_p_s) && (o2->v[0].fp == opt_p_p_s))
-	{
-	  opc->v[1].p = o1->v[1].p;
-	  opc->v[4].p_p_f = o1->v[2].p_p_f;
-	  opc->v[2].p = o2->v[1].p;
-	  opc->v[5].p_p_f = o2->v[2].p_p_f;
-	  opc->v[0].fb = (bpf_case) ? ((opc->v[3].b_pp_f == s7_is_eq) ? opt_b_pp_ffo_is_eq : opt_b_pp_ffo) :
-	                              (((opc->v[4].p_p_f == cadr_p_p) && (opc->v[5].p_p_f == cadr_p_p)) ? opt_b_cadr_cadr : opt_b_7pp_ffo);
-	  sc->pc -= 2;
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[1].p = o1->v[1].p;
+          opc->v[4].p_p_f = o1->v[2].p_p_f;
+          opc->v[2].p = o2->v[1].p;
+          opc->v[5].p_p_f = o2->v[2].p_p_f;
+          opc->v[0].fb = (bpf_case) ? ((opc->v[3].b_pp_f == s7_is_eq) ? opt_b_pp_ffo_is_eq : opt_b_pp_ffo) :
+                                      (((opc->v[4].p_p_f == cadr_p_p) && (opc->v[5].p_p_f == cadr_p_p)) ? opt_b_cadr_cadr : opt_b_7pp_ffo);
+          sc->pc -= 2;
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -62818,11 +62818,11 @@ static void check_b_types(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_po
       s7_pointer arg1_type = opt_arg_type(sc, cdr(car_x));
       s7_pointer arg2_type = opt_arg_type(sc, cddr(car_x));
       if ((cadr(call_sig) == arg1_type) &&                   /* not car(arg1_type) here: (string>? (string) (read-line)) */
-	  (caddr(call_sig) == arg2_type))
-	{
-	  opc->v[0].fb = fb;
-	  opc->v[3].b_pp_f = s7_b_pp_unchecked_function(s_func);
-	}}
+          (caddr(call_sig) == arg2_type))
+        {
+          opc->v[0].fb = fb;
+          opc->v[3].b_pp_f = s7_b_pp_unchecked_function(s_func);
+        }}
 }
 
 static s7_pointer opt_p_c(opt_info *o);
@@ -62838,92 +62838,92 @@ static bool b_pp_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       opc->v[1].p = opt_simple_symbol(sc, arg1);
       opc->v[2].p = opt_simple_symbol(sc, arg2);
       if ((opc->v[1].p) &&
-	  (opc->v[2].p))
-	{
-	  s7_b_7pp_t b7f = (bpf_case) ? NULL : opc->v[3].b_7pp_f;
-	  opc->v[0].fb = (bpf_case) ? opt_b_pp_ss :
-	                  ((b7f == lt_b_7pp) ? opt_b_7pp_ss_lt : ((b7f == gt_b_7pp) ? opt_b_7pp_ss_gt :
+          (opc->v[2].p))
+        {
+          s7_b_7pp_t b7f = (bpf_case) ? NULL : opc->v[3].b_7pp_f;
+          opc->v[0].fb = (bpf_case) ? opt_b_pp_ss :
+                          ((b7f == lt_b_7pp) ? opt_b_7pp_ss_lt : ((b7f == gt_b_7pp) ? opt_b_7pp_ss_gt :
                            ((b7f == char_lt_b_7pp) ? opt_b_7pp_ss_char_lt : opt_b_7pp_ss)));
-	  return_true(sc, car_x);
-	}}
+          return_true(sc, car_x);
+        }}
   if (is_symbol(arg1))
     {
       opc->v[1].p = opt_simple_symbol(sc, arg1);
       if (!opc->v[1].p)
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       if ((!is_symbol(arg2)) &&
-	  (!is_pair(arg2)))
-	{
-	  opc->v[2].p = arg2;
-	  opc->v[0].fb = (bpf_case) ? opt_b_pp_sc : opt_b_7pp_sc;
-	  check_b_types(sc, opc, s_func, car_x, opt_b_pp_sc);
-	  return_true(sc, car_x);
-	}
+          (!is_pair(arg2)))
+        {
+          opc->v[2].p = arg2;
+          opc->v[0].fb = (bpf_case) ? opt_b_pp_sc : opt_b_7pp_sc;
+          check_b_types(sc, opc, s_func, car_x, opt_b_pp_sc);
+          return_true(sc, car_x);
+        }
       if (cell_optimize(sc, cddr(car_x)))
-	{
-	  if (!b_pp_sf_combinable(sc, opc, bpf_case))
-	    {
-	      opc->v[10].o1 = sc->opts[cur_index];
-	      opc->v[11].fp = opc->v[10].o1->v[0].fp;
-	      opc->v[0].fb = (bpf_case) ? opt_b_pp_sf : opt_b_7pp_sf;
-	      check_b_types(sc, opc, s_func, car_x, opt_b_pp_sf); /* this finds b_pp_unchecked cases */
-	      if ((opc->v[11].fp == opt_p_substring_uncopied_ssf) && (opc->v[3].b_pp_f == string_eq_b_unchecked))
-		opc->v[0].fb = opt_substring_equal_sf;
-	      else if (opc->v[3].b_pp_f == char_eq_b_unchecked) opc->v[0].fb = opt_b_pp_sf_char_eq;
-	    }
-	  return_true(sc, car_x);
-	}
+        {
+          if (!b_pp_sf_combinable(sc, opc, bpf_case))
+            {
+              opc->v[10].o1 = sc->opts[cur_index];
+              opc->v[11].fp = opc->v[10].o1->v[0].fp;
+              opc->v[0].fb = (bpf_case) ? opt_b_pp_sf : opt_b_7pp_sf;
+              check_b_types(sc, opc, s_func, car_x, opt_b_pp_sf); /* this finds b_pp_unchecked cases */
+              if ((opc->v[11].fp == opt_p_substring_uncopied_ssf) && (opc->v[3].b_pp_f == string_eq_b_unchecked))
+                opc->v[0].fb = opt_substring_equal_sf;
+              else if (opc->v[3].b_pp_f == char_eq_b_unchecked) opc->v[0].fb = opt_b_pp_sf_char_eq;
+            }
+          return_true(sc, car_x);
+        }
       sc->pc = cur_index;
     }
   else
     if ((is_symbol(arg2)) &&
-	(is_pair(arg1)))
+        (is_pair(arg1)))
       {
-	opc->v[10].o1 = sc->opts[sc->pc];
-	if (cell_optimize(sc, cdr(car_x)))
-	  {
-	    opc->v[1].p = s7_slot(sc, arg2);
-	    if ((!is_slot(opc->v[1].p)) ||
-		(has_methods(slot_value(opc->v[1].p))))
-	      return_false(sc, car_x);
-	    opc->v[11].fp = opc->v[10].o1->v[0].fp;
-	    opc->v[0].fb = (bpf_case) ? opt_b_pp_fs : opt_b_7pp_fs;
-	    check_b_types(sc, opc, s_func, car_x, opt_b_pp_fs);
-	    return_true(sc, car_x);
-	  }
-	sc->pc = cur_index;
+        opc->v[10].o1 = sc->opts[sc->pc];
+        if (cell_optimize(sc, cdr(car_x)))
+          {
+            opc->v[1].p = s7_slot(sc, arg2);
+            if ((!is_slot(opc->v[1].p)) ||
+                (has_methods(slot_value(opc->v[1].p))))
+              return_false(sc, car_x);
+            opc->v[11].fp = opc->v[10].o1->v[0].fp;
+            opc->v[0].fb = (bpf_case) ? opt_b_pp_fs : opt_b_7pp_fs;
+            check_b_types(sc, opc, s_func, car_x, opt_b_pp_fs);
+            return_true(sc, car_x);
+          }
+        sc->pc = cur_index;
       }
   o1 = sc->opts[sc->pc]; /* used below opc->v[8].o1 etc */
   if (cell_optimize(sc, cdr(car_x)))
     {
       opc->v[10].o1 = sc->opts[sc->pc];
       if (cell_optimize(sc, cddr(car_x)))
-	{
-	  if (b_pp_ff_combinable(sc, opc, bpf_case))
-	    return_true(sc, car_x);
-	  opc->v[0].fb = (bpf_case) ? opt_b_pp_ff : opt_b_7pp_ff;
-	  opc->v[8].o1 = o1;
-	  opc->v[9].fp = o1->v[0].fp;
-	  opc->v[11].fp = opc->v[10].o1->v[0].fp;
-	  check_b_types(sc, opc, s_func, car_x, opt_b_pp_ff);
-
-	  if (opc->v[3].b_pp_f == char_eq_b_unchecked)
-	    {
-	      if (opc->v[11].fp == opt_p_c) /* opc->v[11].fp can be opt_p_c where opc->v[10].o1->v[1].p is the char */
-		{
-		  opc->v[0].fb = opt_b_pp_fc_char_eq;
-		  opc->v[11].p = opc->v[10].o1->v[1].p;
-		}
-	      else opc->v[0].fb = opt_b_pp_ff_char_eq;
-	    }
-	  else
-	    if (opc->v[11].fp == opt_p_c)
-	      {
-		opc->v[0].fb = (opc->v[0].fb == opt_b_pp_ff) ? opt_b_pp_fc : opt_b_7pp_fc; /* can't use bpf_case here -- check_b_types can use the other form */
-		opc->v[11].p = opc->v[10].o1->v[1].p;
-	      }
-	  return_true(sc, car_x);
-	}}
+        {
+          if (b_pp_ff_combinable(sc, opc, bpf_case))
+            return_true(sc, car_x);
+          opc->v[0].fb = (bpf_case) ? opt_b_pp_ff : opt_b_7pp_ff;
+          opc->v[8].o1 = o1;
+          opc->v[9].fp = o1->v[0].fp;
+          opc->v[11].fp = opc->v[10].o1->v[0].fp;
+          check_b_types(sc, opc, s_func, car_x, opt_b_pp_ff);
+
+          if (opc->v[3].b_pp_f == char_eq_b_unchecked)
+            {
+              if (opc->v[11].fp == opt_p_c) /* opc->v[11].fp can be opt_p_c where opc->v[10].o1->v[1].p is the char */
+                {
+                  opc->v[0].fb = opt_b_pp_fc_char_eq;
+                  opc->v[11].p = opc->v[10].o1->v[1].p;
+                }
+              else opc->v[0].fb = opt_b_pp_ff_char_eq;
+            }
+          else
+            if (opc->v[11].fp == opt_p_c)
+              {
+                opc->v[0].fb = (opc->v[0].fb == opt_b_pp_ff) ? opt_b_pp_fc : opt_b_7pp_fc; /* can't use bpf_case here -- check_b_types can use the other form */
+                opc->v[11].p = opc->v[10].o1->v[1].p;
+              }
+          return_true(sc, car_x);
+        }}
   return_false(sc, car_x);
 }
 
@@ -62940,29 +62940,29 @@ static bool b_pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opc->v[10].o1 = sc->opts[sc->pc];
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  opt_info *o1 = sc->opts[sc->pc];
-	  opc->v[2].b_pi_f = bpif;
-	  opc->v[11].fp = opc->v[10].o1->v[0].fp;
-	  if (is_symbol(arg2))
-	    {
-	      opc->v[1].p = s7_slot(sc, arg2); /* slot checked in opt_arg_type */
-	      opc->v[0].fb = (bpif == num_eq_b_pi) ? opt_b_pi_fs_num_eq : opt_b_pi_fs;
-	      return_true(sc, car_x);
-	    }
-	  if (is_t_integer(arg2))
-	    {
-	      opc->v[1].i = integer(arg2);
-	      opc->v[0].fb = opt_b_pi_fi;
-	      return_true(sc, car_x);
-	    }
-	  if (int_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[0].fb = opt_b_pi_ff;
-	      opc->v[8].o1 = o1;
-	      opc->v[9].fp = o1->v[0].fp;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opt_info *o1 = sc->opts[sc->pc];
+          opc->v[2].b_pi_f = bpif;
+          opc->v[11].fp = opc->v[10].o1->v[0].fp;
+          if (is_symbol(arg2))
+            {
+              opc->v[1].p = s7_slot(sc, arg2); /* slot checked in opt_arg_type */
+              opc->v[0].fb = (bpif == num_eq_b_pi) ? opt_b_pi_fs_num_eq : opt_b_pi_fs;
+              return_true(sc, car_x);
+            }
+          if (is_t_integer(arg2))
+            {
+              opc->v[1].i = integer(arg2);
+              opc->v[0].fb = opt_b_pi_fi;
+              return_true(sc, car_x);
+            }
+          if (int_optimize(sc, cddr(car_x)))
+            {
+              opc->v[0].fb = opt_b_pi_ff;
+              opc->v[8].o1 = o1;
+              opc->v[9].fp = o1->v[0].fp;
+              return_true(sc, car_x);
+            }}}
   return_false(sc, car_x);
 }
 
@@ -63001,48 +63001,48 @@ static bool b_dd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opc->v[1].p = s7_slot(sc, arg1);
       if (is_symbol(arg2))
-	{
-	  opc->v[2].p = s7_slot(sc, arg2);
-	  opc->v[0].fb = (bif == lt_b_dd) ? opt_b_dd_ss_lt : ((bif == gt_b_dd) ? opt_b_dd_ss_gt : opt_b_dd_ss);
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].p = s7_slot(sc, arg2);
+          opc->v[0].fb = (bif == lt_b_dd) ? opt_b_dd_ss_lt : ((bif == gt_b_dd) ? opt_b_dd_ss_gt : opt_b_dd_ss);
+          return_true(sc, car_x);
+        }
       if (is_t_real(arg2))
-	{
-	  opc->v[2].x = s7_number_to_real(sc, arg2);
-	  opc->v[0].fb = (bif == lt_b_dd) ? opt_b_dd_sc_lt : ((bif == geq_b_dd) ? opt_b_dd_sc_geq : ((bif == num_eq_b_dd) ? opt_b_dd_sc_eq : opt_b_dd_sc));
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].x = s7_number_to_real(sc, arg2);
+          opc->v[0].fb = (bif == lt_b_dd) ? opt_b_dd_sc_lt : ((bif == geq_b_dd) ? opt_b_dd_sc_geq : ((bif == num_eq_b_dd) ? opt_b_dd_sc_eq : opt_b_dd_sc));
+          return_true(sc, car_x);
+        }
       opc->v[10].o1 = sc->opts[sc->pc];
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[11].fd = opc->v[10].o1->v[0].fd;
-	  opc->v[0].fb = opt_b_dd_sf;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[11].fd = opc->v[10].o1->v[0].fd;
+          opc->v[0].fb = opt_b_dd_sf;
+          return_true(sc, car_x);
+        }}
   sc->pc = cur_index;
   opc->v[10].o1 = sc->opts[sc->pc];
   if (float_optimize(sc, cdr(car_x)))
     {
       opc->v[11].fd = opc->v[10].o1->v[0].fd;
       if (is_symbol(arg2))
-	{
-	  opc->v[1].p = s7_slot(sc, arg2);
-	  opc->v[0].fb = (bif == gt_b_dd) ? opt_b_dd_fs_gt : opt_b_dd_fs;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].p = s7_slot(sc, arg2);
+          opc->v[0].fb = (bif == gt_b_dd) ? opt_b_dd_fs_gt : opt_b_dd_fs;
+          return_true(sc, car_x);
+        }
       if (is_small_real(arg2))
-	{
-	  opc->v[1].x = s7_number_to_real(sc, arg2);
-	  opc->v[0].fb = (bif == gt_b_dd) ? opt_b_dd_fc_gt : opt_b_dd_fc;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].x = s7_number_to_real(sc, arg2);
+          opc->v[0].fb = (bif == gt_b_dd) ? opt_b_dd_fc_gt : opt_b_dd_fc;
+          return_true(sc, car_x);
+        }
       opc->v[8].o1 = sc->opts[sc->pc];
       if (float_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[9].fd = opc->v[8].o1->v[0].fd;
-	  opc->v[0].fb = opt_b_dd_ff;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[9].fd = opc->v[8].o1->v[0].fd;
+          opc->v[0].fb = opt_b_dd_ff;
+          return_true(sc, car_x);
+        }}
   sc->pc = cur_index;
   return_false(sc, car_x);
 }
@@ -63095,44 +63095,44 @@ static bool b_ii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       b7if = s7_b_7ii_function(s_func);
       if (!b7if)
-	return_false(sc, car_x);
+        return_false(sc, car_x);
     }
   if (bif) opc->v[3].b_ii_f = bif; else opc->v[3].b_7ii_f = b7if;
   if (is_symbol(arg1))
     {
       opc->v[1].p = s7_slot(sc, arg1);
       if (is_symbol(arg2))
-	{
-	  opc->v[2].p = s7_slot(sc, arg2);
-
-	  opc->v[0].fb = (bif == lt_b_ii) ? opt_b_ii_ss_lt :
-	    ((bif == leq_b_ii) ? opt_b_ii_ss_leq :
-	     ((bif == gt_b_ii) ? opt_b_ii_ss_gt :
-	      ((bif == geq_b_ii) ? opt_b_ii_ss_geq :
-	       ((bif == num_eq_b_ii) ? opt_b_ii_ss_eq :
-		((bif) ? opt_b_ii_ss : opt_b_7ii_ss)))));
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].p = s7_slot(sc, arg2);
+
+          opc->v[0].fb = (bif == lt_b_ii) ? opt_b_ii_ss_lt :
+            ((bif == leq_b_ii) ? opt_b_ii_ss_leq :
+             ((bif == gt_b_ii) ? opt_b_ii_ss_gt :
+              ((bif == geq_b_ii) ? opt_b_ii_ss_geq :
+               ((bif == num_eq_b_ii) ? opt_b_ii_ss_eq :
+                ((bif) ? opt_b_ii_ss : opt_b_7ii_ss)))));
+          return_true(sc, car_x);
+        }
       if (is_t_integer(arg2))
-	{
-	  s7_int i2 = integer(arg2);
-	  opc->v[2].i = i2;
-	  opc->v[0].fb = (bif == num_eq_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_eq_0 : ((i2 == 1) ? opt_b_ii_sc_eq_1 : opt_b_ii_sc_eq)) :
-	    ((bif == lt_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_lt_0 : ((i2 == 1) ? opt_b_ii_sc_lt_1 : ((i2 == 2) ? opt_b_ii_sc_lt_2 : opt_b_ii_sc_lt))) :
-	     ((bif == gt_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_gt_0 : opt_b_ii_sc_gt) :
-	      ((bif == leq_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_leq_0 : opt_b_ii_sc_leq) :
-	       ((bif == geq_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_geq_0 : opt_b_ii_sc_geq) :
-		(((b7if == logbit_b_7ii) && (i2 >= 0) && (i2 < S7_INT_BITS)) ? opt_b_7ii_sc_bit :
-		 ((bif) ? opt_b_ii_sc : opt_b_7ii_sc))))));
-	  return_true(sc, car_x);
-	}
+        {
+          s7_int i2 = integer(arg2);
+          opc->v[2].i = i2;
+          opc->v[0].fb = (bif == num_eq_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_eq_0 : ((i2 == 1) ? opt_b_ii_sc_eq_1 : opt_b_ii_sc_eq)) :
+            ((bif == lt_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_lt_0 : ((i2 == 1) ? opt_b_ii_sc_lt_1 : ((i2 == 2) ? opt_b_ii_sc_lt_2 : opt_b_ii_sc_lt))) :
+             ((bif == gt_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_gt_0 : opt_b_ii_sc_gt) :
+              ((bif == leq_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_leq_0 : opt_b_ii_sc_leq) :
+               ((bif == geq_b_ii) ? ((i2 == 0) ? opt_b_ii_sc_geq_0 : opt_b_ii_sc_geq) :
+                (((b7if == logbit_b_7ii) && (i2 >= 0) && (i2 < S7_INT_BITS)) ? opt_b_7ii_sc_bit :
+                 ((bif) ? opt_b_ii_sc : opt_b_7ii_sc))))));
+          return_true(sc, car_x);
+        }
       opc->v[10].o1 = sc->opts[sc->pc];
       if ((bif) && (int_optimize(sc, cddr(car_x))))
-	{
-	  opc->v[0].fb = (bif == num_eq_b_ii) ? opt_b_ii_sf_eq : opt_b_ii_sf;
-	  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fb = (bif == num_eq_b_ii) ? opt_b_ii_sf_eq : opt_b_ii_sf;
+          opc->v[11].fi = opc->v[10].o1->v[0].fi;
+          return_true(sc, car_x);
+        }
       return_false(sc, car_x);
     }
   if (!bif) return_false(sc, car_x);
@@ -63141,7 +63141,7 @@ static bool b_ii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opc->v[10].o1 = sc->opts[sc->pc];
       if (!int_optimize(sc, cdr(car_x)))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       opc->v[11].fi = opc->v[10].o1->v[0].fi;
       opc->v[2].p = s7_slot(sc, arg2);
       opc->v[0].fb = opt_b_ii_fs;
@@ -63152,18 +63152,18 @@ static bool b_ii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opc->v[11].fi = opc->v[10].o1->v[0].fi;
       if (is_t_integer(arg2))
-	{
-	  opc->v[2].i = integer(arg2);
-	  opc->v[0].fb = (bif == num_eq_b_ii) ? opt_b_ii_fc_eq : opt_b_ii_fc;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].i = integer(arg2);
+          opc->v[0].fb = (bif == num_eq_b_ii) ? opt_b_ii_fc_eq : opt_b_ii_fc;
+          return_true(sc, car_x);
+        }
       opc->v[8].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[9].fi = opc->v[8].o1->v[0].fi;
-	  opc->v[0].fb = opt_b_ii_ff;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[9].fi = opc->v[8].o1->v[0].fi;
+          opc->v[0].fb = opt_b_ii_ff;
+          return_true(sc, car_x);
+        }}
   return_false(sc, car_x);
 }
 
@@ -63176,7 +63176,7 @@ static bool opt_and_any_b(opt_info *o)
     {
       opt_info *o1 = o->v[i + 3].o1;
       if (!o1->v[0].fb(o1))
-	return(false);
+        return(false);
     }
   return(true);
 }
@@ -63189,7 +63189,7 @@ static bool opt_or_any_b(opt_info *o)
     {
       opt_info *o1 = o->v[i + 3].o1;
       if (o1->v[0].fb(o1))
-	return(true);
+        return(true);
     }
   return(false);
 }
@@ -63202,17 +63202,17 @@ static bool opt_b_or_and(s7_scheme *sc, s7_pointer car_x, int32_t len, int32_t i
     {
       opt_info *o1 = sc->opts[sc->pc];
       if (bool_optimize_nw(sc, cdr(car_x)))
-	{
-	  opt_info *o2 = sc->opts[sc->pc];
-	  if (bool_optimize_nw(sc, cddr(car_x)))
-	    {
-	      opc->v[10].o1 = o2;
-	      opc->v[11].fb = o2->v[0].fb;
-	      opc->v[0].fb = (is_and) ? opt_and_bb : opt_or_bb;
-	      opc->v[2].o1 = o1;
-	      opc->v[3].fb = o1->v[0].fb;
-	      return_true(sc, car_x);
-	    }}
+        {
+          opt_info *o2 = sc->opts[sc->pc];
+          if (bool_optimize_nw(sc, cddr(car_x)))
+            {
+              opc->v[10].o1 = o2;
+              opc->v[11].fb = o2->v[0].fb;
+              opc->v[0].fb = (is_and) ? opt_and_bb : opt_or_bb;
+              opc->v[2].o1 = o1;
+              opc->v[3].fb = o1->v[0].fb;
+              return_true(sc, car_x);
+            }}
       return_false(sc, car_x);
     }
   opc->v[1].i = (len - 1);
@@ -63220,7 +63220,7 @@ static bool opt_b_or_and(s7_scheme *sc, s7_pointer car_x, int32_t len, int32_t i
     {
       opc->v[i + 3].o1 = sc->opts[sc->pc];
       if (!bool_optimize_nw(sc, p))
-	break;
+        break;
     }
   if (!is_null(p))
     return_false(sc, car_x);
@@ -63321,13 +63321,13 @@ static bool p_p_f_combinable(s7_scheme *sc, opt_info *opc)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if (o1->v[0].fp == opt_p_p_s)
-	{
-	  opc->v[3].p_p_f = o1->v[2].p_p_f;
-	  opc->v[1].p = o1->v[1].p;
-	  opc->v[0].fp = opt_p_p_f1;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[3].p_p_f = o1->v[2].p_p_f;
+          opc->v[1].p = o1->v[1].p;
+          opc->v[0].fp = opt_p_p_f1;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -63346,127 +63346,127 @@ static bool p_p_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer c
       s7_i_7i_t i7if;
       opc->v[1].i = integer(arg1);
       if (iif)
-	{
-	  opc->v[2].i_i_f = iif;
-	  opc->v[0].fp = opt_p_i_c;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].i_i_f = iif;
+          opc->v[0].fp = opt_p_i_c;
+          return_true(sc, car_x);
+        }
       i7if = s7_i_7i_function(s_func);
       if (i7if)
-	{
-	  opc->v[2].i_7i_f = i7if;
-	  opc->v[0].fp = opt_p_7i_c;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[2].i_7i_f = i7if;
+          opc->v[0].fp = opt_p_7i_c;
+          return_true(sc, car_x);
+        }}
   if (is_t_real(arg1))
     {
       s7_d_d_t ddf = s7_d_d_function(s_func);
       s7_d_7d_t d7df;
       opc->v[1].x = real(arg1);
       if (ddf)
-	{
-	  opc->v[2].d_d_f = ddf;
-	  opc->v[0].fp = opt_p_d_c;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[2].d_d_f = ddf;
+          opc->v[0].fp = opt_p_d_c;
+          return_true(sc, car_x);
+        }
       d7df = s7_d_7d_function(s_func);
       if (d7df)
-	{
-	  opc->v[2].d_7d_f = d7df;
-	  opc->v[0].fp = (d7df == random_d_7d) ? opt_p_7d_c_random : opt_p_7d_c;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[2].d_7d_f = d7df;
+          opc->v[0].fp = (d7df == random_d_7d) ? opt_p_7d_c_random : opt_p_7d_c;
+          return_true(sc, car_x);
+        }}
   ppf = s7_p_p_function(s_func);
   if (ppf)
     {
       opt_info *o1;
       opc->v[2].p_p_f = ppf;
       if ((ppf == symbol_to_string_p_p) &&
-	  (is_optimized(car_x)) &&
-	  (fn_proc(car_x) == g_symbol_to_string_uncopied))
-	opc->v[2].p_p_f = symbol_to_string_uncopied_p;
+          (is_optimized(car_x)) &&
+          (fn_proc(car_x) == g_symbol_to_string_uncopied))
+        opc->v[2].p_p_f = symbol_to_string_uncopied_p;
 
       if (is_symbol(arg1))
-	{
-	  opc->v[1].p = opt_simple_symbol(sc, arg1);
-	  if (!opc->v[1].p)
-	    return_false(sc, car_x);
-	  opc->v[0].fp = (ppf == abs_p_p) ? opt_p_p_s_abs : ((ppf == cdr_p_p) ? opt_p_p_s_cdr :
-			   ((ppf == iterate_p_p) ? ((is_iterator(slot_value(opc->v[1].p))) ? opt_p_p_s_iterate_unchecked : opt_p_p_s_iterate) : opt_p_p_s));
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].p = opt_simple_symbol(sc, arg1);
+          if (!opc->v[1].p)
+            return_false(sc, car_x);
+          opc->v[0].fp = (ppf == abs_p_p) ? opt_p_p_s_abs : ((ppf == cdr_p_p) ? opt_p_p_s_cdr :
+                           ((ppf == iterate_p_p) ? ((is_iterator(slot_value(opc->v[1].p))) ? opt_p_p_s_iterate_unchecked : opt_p_p_s_iterate) : opt_p_p_s));
+          return_true(sc, car_x);
+        }
       if (!is_pair(arg1))
-	{
-	  if (opc->v[2].p_p_f == s7_length)
-	    {
-	      opc->v[1].p = s7_length(sc, arg1);
-	      opc->v[0].fp = opt_p_c;
-	    }
-	  else
-	    {
-	      opc->v[1].p = arg1;
-	      opc->v[0].fp = opt_p_p_c;
-	    }
-	  return_true(sc, car_x);
-	}
+        {
+          if (opc->v[2].p_p_f == s7_length)
+            {
+              opc->v[1].p = s7_length(sc, arg1);
+              opc->v[0].fp = opt_p_c;
+            }
+          else
+            {
+              opc->v[1].p = arg1;
+              opc->v[0].fp = opt_p_p_c;
+            }
+          return_true(sc, car_x);
+        }
       o1 = sc->opts[sc->pc];
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  if (!p_p_f_combinable(sc, opc))
-	    {
-	      s7_pointer (*fp)(opt_info *o);
-	      opc->v[0].fp = (ppf == exp_p_p) ? opt_p_p_f_exp : ((ppf == iterate_p_p) ? opt_p_p_f_iterate :
-			       ((ppf == string_to_number_p_p) ? opt_p_p_f_string_to_number : opt_p_p_f));
-	      if (caadr(car_x) == sc->string_ref_symbol)
-		{
-		  if (opc->v[2].p_p_f == char_upcase_p_p)
-		    opc->v[2].p_p_f = char_upcase_p_p_unchecked;
-		  else
-		    if (opc->v[2].p_p_f == is_char_whitespace_p_p)
-		      opc->v[2].p_p_f = is_char_whitespace_p_p_unchecked;
-		}
-	      opc->v[3].o1 = o1;
-	      fp = o1->v[0].fp;
-	      opc->v[4].fp = fp;
-	      if (fp == opt_p_pi_ss_fvref_direct) opc->v[0].fp = opt_p_p_fvref;
-	      else if (fp == opt_p_pi_ss_vref_direct) opc->v[0].fp = opt_p_p_vref;
-	      else if (fp == opt_p_pi_ss_ivref_direct) opc->v[0].fp = opt_p_p_ivref;
-	    }
-	  return_true(sc, car_x);
-	}}
+        {
+          if (!p_p_f_combinable(sc, opc))
+            {
+              s7_pointer (*fp)(opt_info *o);
+              opc->v[0].fp = (ppf == exp_p_p) ? opt_p_p_f_exp : ((ppf == iterate_p_p) ? opt_p_p_f_iterate :
+                               ((ppf == string_to_number_p_p) ? opt_p_p_f_string_to_number : opt_p_p_f));
+              if (caadr(car_x) == sc->string_ref_symbol)
+                {
+                  if (opc->v[2].p_p_f == char_upcase_p_p)
+                    opc->v[2].p_p_f = char_upcase_p_p_unchecked;
+                  else
+                    if (opc->v[2].p_p_f == is_char_whitespace_p_p)
+                      opc->v[2].p_p_f = is_char_whitespace_p_p_unchecked;
+                }
+              opc->v[3].o1 = o1;
+              fp = o1->v[0].fp;
+              opc->v[4].fp = fp;
+              if (fp == opt_p_pi_ss_fvref_direct) opc->v[0].fp = opt_p_p_fvref;
+              else if (fp == opt_p_pi_ss_vref_direct) opc->v[0].fp = opt_p_p_vref;
+              else if (fp == opt_p_pi_ss_ivref_direct) opc->v[0].fp = opt_p_p_ivref;
+            }
+          return_true(sc, car_x);
+        }}
 
   sc->pc = start;
   if ((is_safe_procedure(s_func)) && (c_function_is_aritable(s_func, 1)))
     {
       opc->v[2].call = cf_call(sc, car_x, s_func, 1);
       if (is_symbol(arg1))
-	{
-	  s7_pointer slot = opt_simple_symbol(sc, arg1);
-	  if (slot)
-	    {
-	      opc->v[1].p = slot;
-	      opc->v[0].fp = opt_p_call_s;
-	      return_true(sc, car_x);
-	    }}
+        {
+          s7_pointer slot = opt_simple_symbol(sc, arg1);
+          if (slot)
+            {
+              opc->v[1].p = slot;
+              opc->v[0].fp = opt_p_call_s;
+              return_true(sc, car_x);
+            }}
       else
-	{
-	  opt_info *o1;
-	  if (!is_pair(arg1))
-	    {
-	      opc->v[1].p = arg1;
-	      opc->v[0].fp = opt_p_call_c;
-	      return_true(sc, car_x);
-	    }
-	  o1 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cdr(car_x)))
-	    {
-	      opc->v[0].fp = opt_p_call_f;
-	      opc->v[4].o1 = o1;
-	      opc->v[5].fp = o1->v[0].fp;
-	      if (opc->v[5].fp == opt_p_pi_ss_fvref_direct) opc->v[5].fp = opt_p_pi_ss_fvref_direct_wrapped;
-	      else if (opc->v[5].fp == opt_p_pi_ss_ivref_direct) opc->v[5].fp = opt_p_pi_ss_ivref_direct_wrapped;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opt_info *o1;
+          if (!is_pair(arg1))
+            {
+              opc->v[1].p = arg1;
+              opc->v[0].fp = opt_p_call_c;
+              return_true(sc, car_x);
+            }
+          o1 = sc->opts[sc->pc];
+          if (cell_optimize(sc, cdr(car_x)))
+            {
+              opc->v[0].fp = opt_p_call_f;
+              opc->v[4].o1 = o1;
+              opc->v[5].fp = o1->v[0].fp;
+              if (opc->v[5].fp == opt_p_pi_ss_fvref_direct) opc->v[5].fp = opt_p_pi_ss_fvref_direct_wrapped;
+              else if (opc->v[5].fp == opt_p_pi_ss_ivref_direct) opc->v[5].fp = opt_p_pi_ss_ivref_direct_wrapped;
+              return_true(sc, car_x);
+            }}}
   return_false(sc, car_x);
 }
 
@@ -63523,22 +63523,22 @@ static bool p_ii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       s7_pointer p1 = opt_integer_symbol(sc, cadr(car_x));
       if (p1)
-	{
-	  opc->v[1].p = p1;
-	  opc->v[2].p = p2;
-	  opc->v[3].p_ii_f = ifunc;
-	  opc->v[0].fp = opt_p_ii_ss;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].p = p1;
+          opc->v[2].p = p2;
+          opc->v[3].p_ii_f = ifunc;
+          opc->v[0].fp = opt_p_ii_ss;
+          return_true(sc, car_x);
+        }
       opc->v[10].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	  opc->v[2].p = p2;
-	  opc->v[3].p_ii_f = ifunc;
-	  opc->v[0].fp = opt_p_ii_fs;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[11].fi = opc->v[10].o1->v[0].fi;
+          opc->v[2].p = p2;
+          opc->v[3].p_ii_f = ifunc;
+          opc->v[0].fp = opt_p_ii_fs;
+          return_true(sc, car_x);
+        }
       sc->pc = pstart;
       return_false(sc, car_x);
     }
@@ -63547,13 +63547,13 @@ static bool p_ii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       opc->v[8].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	  opc->v[9].fi = opc->v[8].o1->v[0].fi;
-	  opc->v[3].p_ii_f = ifunc;
-	  opc->v[0].fp = (ifunc == divide_p_ii) ? opt_p_ii_ff_divide : opt_p_ii_ff;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[11].fi = opc->v[10].o1->v[0].fi;
+          opc->v[9].fi = opc->v[8].o1->v[0].fi;
+          opc->v[3].p_ii_f = ifunc;
+          opc->v[0].fp = (ifunc == divide_p_ii) ? opt_p_ii_ff_divide : opt_p_ii_ff;
+          return_true(sc, car_x);
+        }}
   sc->pc = pstart;
   return_false(sc, car_x);
 }
@@ -63608,33 +63608,33 @@ static bool p_dd_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if (is_t_real(arg2))
     {
       if (is_t_real(arg1))
-	{
-	  opc->v[1].x = real(arg1);
-	  opc->v[2].x = real(arg2);
-	  opc->v[3].p_dd_f = ifunc;
-	  opc->v[0].fp = opt_p_dd_cc;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[1].x = real(arg1);
+          opc->v[2].x = real(arg2);
+          opc->v[3].p_dd_f = ifunc;
+          opc->v[0].fp = opt_p_dd_cc;
+          return_true(sc, car_x);
+        }
       slot = opt_real_symbol(sc, arg1);
       if (slot)
-	{
-	  opc->v[2].x = real(arg2);
-	  opc->v[1].p = slot;
-	  opc->v[3].p_dd_f = ifunc;
-	  opc->v[0].fp = opt_p_dd_sc;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[2].x = real(arg2);
+          opc->v[1].p = slot;
+          opc->v[3].p_dd_f = ifunc;
+          opc->v[0].fp = opt_p_dd_sc;
+          return_true(sc, car_x);
+        }}
   if (is_t_real(arg1))
     {
       slot = opt_real_symbol(sc, arg2);
       if (slot)
-	{
-	  opc->v[2].x = real(arg1);
-	  opc->v[1].p = slot;
-	  opc->v[3].p_dd_f = ifunc;
-	  opc->v[0].fp = opt_p_dd_cs;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[2].x = real(arg1);
+          opc->v[1].p = slot;
+          opc->v[3].p_dd_f = ifunc;
+          opc->v[0].fp = opt_p_dd_cs;
+          return_true(sc, car_x);
+        }}
   sc->pc = pstart;
   return_false(sc, car_x);
 }
@@ -63680,26 +63680,26 @@ static void check_unchecked(s7_scheme *sc, s7_pointer obj, s7_pointer slot, opt_
     {
     case T_STRING:
       if (((!expr) || (car(expr) == sc->string_ref_symbol)) && (loop_end(slot) <= string_length(obj)))
-	opc->v[3].p_pi_f = string_ref_p_pi_direct;
+        opc->v[3].p_pi_f = string_ref_p_pi_direct;
       break;
     case T_BYTE_VECTOR:
       if (((!expr) || (car(expr) == sc->byte_vector_ref_symbol) || (car(expr) == sc->vector_ref_symbol)) &&
-	  (loop_end(slot) <= byte_vector_length(obj)))
-	opc->v[3].p_pi_f = byte_vector_ref_p_pi_direct;
+          (loop_end(slot) <= byte_vector_length(obj)))
+        opc->v[3].p_pi_f = byte_vector_ref_p_pi_direct;
       break;
     case T_VECTOR:
       if (((!expr) || (car(expr) == sc->vector_ref_symbol)) && (loop_end(slot) <= vector_length(obj)))
-	opc->v[3].p_pi_f = t_vector_ref_p_pi_direct;
+        opc->v[3].p_pi_f = t_vector_ref_p_pi_direct;
       break;
     case T_FLOAT_VECTOR:
       if (((!expr) || (car(expr) == sc->float_vector_ref_symbol) || (car(expr) == sc->vector_ref_symbol)) &&
-	  (loop_end(slot) <= vector_length(obj)))
-	opc->v[3].p_pi_f = float_vector_ref_p_pi_direct;
+          (loop_end(slot) <= vector_length(obj)))
+        opc->v[3].p_pi_f = float_vector_ref_p_pi_direct;
       break;
     case T_INT_VECTOR:
       if (((!expr) || (car(expr) == sc->int_vector_ref_symbol) || (car(expr) == sc->vector_ref_symbol)) &&
-	  (loop_end(slot) <= vector_length(obj)))
-	opc->v[3].p_pi_f = int_vector_ref_p_pi_direct;
+          (loop_end(slot) <= vector_length(obj)))
+        opc->v[3].p_pi_f = int_vector_ref_p_pi_direct;
       break;
     }
 }
@@ -63711,8 +63711,8 @@ static void fixup_p_pi_ss(opt_info *opc)
      ((opc->v[3].p_pi_f == t_vector_ref_p_pi_unchecked) ? opt_p_pi_ss_vref :
       ((opc->v[3].p_pi_f == float_vector_ref_p_pi_direct) ? opt_p_pi_ss_fvref_direct :
        ((opc->v[3].p_pi_f == int_vector_ref_p_pi_direct) ? opt_p_pi_ss_ivref_direct :
-	((opc->v[3].p_pi_f == t_vector_ref_p_pi_direct) ? opt_p_pi_ss_vref_direct :
-	 ((opc->v[3].p_pi_f == list_ref_p_pi_unchecked) ? opt_p_pi_ss_pref : opt_p_pi_ss))))));
+        ((opc->v[3].p_pi_f == t_vector_ref_p_pi_direct) ? opt_p_pi_ss_vref_direct :
+         ((opc->v[3].p_pi_f == list_ref_p_pi_unchecked) ? opt_p_pi_ss_pref : opt_p_pi_ss))))));
 }
 
 static bool p_pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer sig, s7_pointer car_x)
@@ -63741,22 +63741,22 @@ static bool p_pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       obj = slot_value(opc->v[1].p);
       if ((is_string(obj)) ||
-	  (is_pair(obj)) ||
-	  (is_any_vector(obj)))
-	{
-	  if (((is_string(obj)) && (checker == sc->is_string_symbol)) ||
-	      ((is_any_vector(obj)) && (checker == sc->is_vector_symbol)) ||
-	      ((is_pair(obj)) && (checker == sc->is_pair_symbol)) ||
-	      ((is_byte_vector(obj)) && (checker == sc->is_byte_vector_symbol)))
-	    opc->v[3].p_pi_f = (is_t_vector(obj)) ? t_vector_ref_p_pi_unchecked : s7_p_pi_unchecked_function(s_func);
-	}}
+          (is_pair(obj)) ||
+          (is_any_vector(obj)))
+        {
+          if (((is_string(obj)) && (checker == sc->is_string_symbol)) ||
+              ((is_any_vector(obj)) && (checker == sc->is_vector_symbol)) ||
+              ((is_pair(obj)) && (checker == sc->is_pair_symbol)) ||
+              ((is_byte_vector(obj)) && (checker == sc->is_byte_vector_symbol)))
+            opc->v[3].p_pi_f = (is_t_vector(obj)) ? t_vector_ref_p_pi_unchecked : s7_p_pi_unchecked_function(s_func);
+        }}
   slot1 = opt_integer_symbol(sc, caddr(car_x));
   if (slot1)
     {
       opc->v[2].p = slot1;
       if ((obj) &&
-	  (has_loop_end(slot1)))
-	check_unchecked(sc, obj, slot1, opc, car_x);
+          (has_loop_end(slot1)))
+        check_unchecked(sc, obj, slot1, opc, car_x);
       fixup_p_pi_ss(opc);
       return_true(sc, car_x);
     }
@@ -63770,7 +63770,7 @@ static bool p_pi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if (int_optimize(sc, cddr(car_x)))
     {
       opc->v[0].fp = (opc->v[3].p_pi_f == string_ref_p_pi_unchecked) ? opt_p_pi_sf_sref :
-	              ((opc->v[3].p_pi_f == string_ref_p_pi_direct) ? opt_p_pi_sf_sref_direct : opt_p_pi_sf);
+                      ((opc->v[3].p_pi_f == string_ref_p_pi_direct) ? opt_p_pi_sf_sref_direct : opt_p_pi_sf);
       opc->v[4].o1 = o1;
       opc->v[5].fi = o1->v[0].fi;
       return_true(sc, car_x);
@@ -63787,13 +63787,13 @@ static bool p_pi_fc_combinable(s7_scheme *sc, opt_info *opc)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if (o1->v[0].fp == opt_p_p_s)
-	{
-	  opc->v[4].p_p_f = o1->v[2].p_p_f;
-	  opc->v[1].p = o1->v[1].p;
-	  opc->v[0].fp = opt_p_pi_fco;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[4].p_p_f = o1->v[2].p_p_f;
+          opc->v[1].p = o1->v[1].p;
+          opc->v[0].fp = opt_p_pi_fco;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -63859,7 +63859,7 @@ static s7_pointer opt_p_pp_ff_add_mul_mul_1(opt_info *o, bool add_case) /* (+|-
       s7_double r2 = real(f2);
       f4 = o2->v[5].fp(o2->v[4].o1);
       if (is_t_real(f4))
-	return(make_real(sc, (add_case) ? ((real(s1) * r2) + (real(s3) * real(f4))) : ((real(s1) * r2) - (real(s3) * real(f4)))));
+        return(make_real(sc, (add_case) ? ((real(s1) * r2) + (real(s3) * real(f4))) : ((real(s1) * r2) - (real(s3) * real(f4)))));
       gc_protect_via_stack_no_let(sc, f2);
     }
   else
@@ -63911,161 +63911,161 @@ static bool p_pp_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       s7_pointer obj;
       slot = opt_simple_symbol(sc, arg1);
       if (!slot)
-	{
-	  sc->pc = pstart;
-	  return_false(sc, car_x);
-	}
+        {
+          sc->pc = pstart;
+          return_false(sc, car_x);
+        }
       obj = slot_value(slot);
       if ((is_any_vector(obj)) && (vector_rank(obj) > 1))
-	{
-	  sc->pc = pstart;
-	  return_false(sc, car_x);
-	}
+        {
+          sc->pc = pstart;
+          return_false(sc, car_x);
+        }
       opc->v[1].p = slot;
 
       if ((func == hash_table_ref_p_pp) && (is_hash_table(obj)))
-	opc->v[3].p_pp_f = s7_hash_table_ref;
+        opc->v[3].p_pp_f = s7_hash_table_ref;
 
       if (is_symbol(arg2))
-	{
-	  opc->v[2].p = opt_simple_symbol(sc, arg2);
-	  if (opc->v[2].p)
-	    {
-	      opc->v[0].fp = (func == set_car_p_pp) ? opt_set_car_pp_ss :
-		(((is_hash_table(obj)) && (func == hash_table_ref_p_pp)) ? opt_p_pp_ss_href :
-		 (((is_let(obj)) && (func == let_ref)) ? opt_p_pp_ss_lref : opt_p_pp_ss));
-
-	      /* if ss = s+k use slot_ref */
-	      if ((opc->v[0].fp == opt_p_pp_ss_lref) && (is_keyword(arg2)))
-		use_slot_ref(sc, opc, obj, keyword_symbol(arg2));
-
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = pstart;
-	  return_false(sc, car_x);
-	}
+        {
+          opc->v[2].p = opt_simple_symbol(sc, arg2);
+          if (opc->v[2].p)
+            {
+              opc->v[0].fp = (func == set_car_p_pp) ? opt_set_car_pp_ss :
+                (((is_hash_table(obj)) && (func == hash_table_ref_p_pp)) ? opt_p_pp_ss_href :
+                 (((is_let(obj)) && (func == let_ref)) ? opt_p_pp_ss_lref : opt_p_pp_ss));
+
+              /* if ss = s+k use slot_ref */
+              if ((opc->v[0].fp == opt_p_pp_ss_lref) && (is_keyword(arg2)))
+                use_slot_ref(sc, opc, obj, keyword_symbol(arg2));
+
+              return_true(sc, car_x);
+            }
+          sc->pc = pstart;
+          return_false(sc, car_x);
+        }
       if ((!is_pair(arg2)) ||
-	  (is_proper_quote(sc, arg2)))
-	{
-	  opc->v[2].p = (!is_pair(arg2)) ? arg2 : cadr(arg2);
-	  opc->v[0].fp = opt_p_pp_sc;
-	  if ((is_pair(arg2)) && (is_symbol(opc->v[2].p)) && (is_let(obj)) && (opc->v[3].p_pp_f == let_ref))
-	    use_slot_ref(sc, opc, obj, cadr(arg2));          /* car_x: (let-ref L 'a), can't be keyword here (handled above) */
-	  return_true(sc, car_x);
-	}
+          (is_proper_quote(sc, arg2)))
+        {
+          opc->v[2].p = (!is_pair(arg2)) ? arg2 : cadr(arg2);
+          opc->v[0].fp = opt_p_pp_sc;
+          if ((is_pair(arg2)) && (is_symbol(opc->v[2].p)) && (is_let(obj)) && (opc->v[3].p_pp_f == let_ref))
+            use_slot_ref(sc, opc, obj, cadr(arg2));          /* car_x: (let-ref L 'a), can't be keyword here (handled above) */
+          return_true(sc, car_x);
+        }
       if (cell_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[0].fp = (func == add_p_pp) ? opt_p_pp_sf_add : ((func == subtract_p_pp) ? opt_p_pp_sf_sub : ((func == multiply_p_pp) ? opt_p_pp_sf_mul :
+        {
+          opc->v[0].fp = (func == add_p_pp) ? opt_p_pp_sf_add : ((func == subtract_p_pp) ? opt_p_pp_sf_sub : ((func == multiply_p_pp) ? opt_p_pp_sf_mul :
                            ((func == set_car_p_pp) ? opt_p_pp_sf_set_car : ((func == set_cdr_p_pp) ? opt_p_pp_sf_set_cdr :
                             (((is_hash_table(obj)) && (opc->v[3].p_pp_f == s7_hash_table_ref)) ? opt_p_pp_sf_href :
-			     (((is_let(obj)) && (opc->v[3].p_pp_f == let_ref)) ? opt_p_pp_sf_lref : opt_p_pp_sf))))));
-	  opc->v[4].o1 = sc->opts[pstart];
-	  opc->v[5].fp = sc->opts[pstart]->v[0].fp;
-	  if (opc->v[5].fp == opt_p_pi_ss_ivref_direct) opc->v[5].fp = opt_p_pi_ss_ivref_direct_wrapped;
-	  return_true(sc, car_x);
-	}}
+                             (((is_let(obj)) && (opc->v[3].p_pp_f == let_ref)) ? opt_p_pp_sf_lref : opt_p_pp_sf))))));
+          opc->v[4].o1 = sc->opts[pstart];
+          opc->v[5].fp = sc->opts[pstart]->v[0].fp;
+          if (opc->v[5].fp == opt_p_pi_ss_ivref_direct) opc->v[5].fp = opt_p_pi_ss_ivref_direct_wrapped;
+          return_true(sc, car_x);
+        }}
   else /* cadr not a symbol */
     {
       opt_info *o1 = sc->opts[sc->pc];
       if ((!is_pair(arg1)) ||
-	  (is_proper_quote(sc, arg1)))
-	{
-	  opc->v[1].p = (!is_pair(arg1)) ? arg1 : cadr(arg1);
-	  if ((!is_symbol(arg2)) &&
-	      ((!is_pair(arg2)) ||
-	       (is_proper_quote(sc, arg2))))
-	    {
-	      opc->v[2].p = (!is_pair(arg2)) ? arg2 : cadr(arg2);
-	      if ((opc->v[3].p_pp_f == make_list_p_pp) &&
-		  (is_t_integer(opc->v[1].p)) && (integer(opc->v[1].p) >= 0) && (integer(opc->v[1].p) < sc->max_list_length))
-		{
-		  opc->v[0].fp = opt_p_pp_cc_make_list;
-		  opc->v[1].i = integer(opc->v[1].p);
-		}
-	      else opc->v[0].fp = opt_p_pp_cc;
-	      return_true(sc, car_x);
-	    }
-	  if (is_symbol(arg2))
-	    {
-	      opc->v[2].p = opc->v[1].p;
-	      opc->v[1].p = opt_simple_symbol(sc, arg2);
-	      if (opc->v[1].p)
-		{
-		  opc->v[0].fp = opt_p_pp_cs;
-		  if (is_pair(slot_value(opc->v[1].p)))
-		    {
-		      if (func == assq_p_pp) opc->v[3].p_pp_f = s7_assq;
-		      else
-			if (func == memq_p_pp) opc->v[3].p_pp_f = s7_memq;
-			else
-			  if ((func == member_p_pp) && (is_simple(opc->v[2].p))) opc->v[3].p_pp_f = s7_memq;
-			  else
-			    if (func == assoc_p_pp)
-			      {
-				if (is_simple(opc->v[2].p)) opc->v[3].p_pp_f = s7_assq;
-				else if (is_pair(car(slot_value(opc->v[1].p)))) opc->v[3].p_pp_f = assoc_1;
-			      }}
-		  return_true(sc, car_x);
-		}
-	      sc->pc = pstart;
-	      return_false(sc, car_x);
-	    }}
+          (is_proper_quote(sc, arg1)))
+        {
+          opc->v[1].p = (!is_pair(arg1)) ? arg1 : cadr(arg1);
+          if ((!is_symbol(arg2)) &&
+              ((!is_pair(arg2)) ||
+               (is_proper_quote(sc, arg2))))
+            {
+              opc->v[2].p = (!is_pair(arg2)) ? arg2 : cadr(arg2);
+              if ((opc->v[3].p_pp_f == make_list_p_pp) &&
+                  (is_t_integer(opc->v[1].p)) && (integer(opc->v[1].p) >= 0) && (integer(opc->v[1].p) < sc->max_list_length))
+                {
+                  opc->v[0].fp = opt_p_pp_cc_make_list;
+                  opc->v[1].i = integer(opc->v[1].p);
+                }
+              else opc->v[0].fp = opt_p_pp_cc;
+              return_true(sc, car_x);
+            }
+          if (is_symbol(arg2))
+            {
+              opc->v[2].p = opc->v[1].p;
+              opc->v[1].p = opt_simple_symbol(sc, arg2);
+              if (opc->v[1].p)
+                {
+                  opc->v[0].fp = opt_p_pp_cs;
+                  if (is_pair(slot_value(opc->v[1].p)))
+                    {
+                      if (func == assq_p_pp) opc->v[3].p_pp_f = s7_assq;
+                      else
+                        if (func == memq_p_pp) opc->v[3].p_pp_f = s7_memq;
+                        else
+                          if ((func == member_p_pp) && (is_simple(opc->v[2].p))) opc->v[3].p_pp_f = s7_memq;
+                          else
+                            if (func == assoc_p_pp)
+                              {
+                                if (is_simple(opc->v[2].p)) opc->v[3].p_pp_f = s7_assq;
+                                else if (is_pair(car(slot_value(opc->v[1].p)))) opc->v[3].p_pp_f = assoc_1;
+                              }}
+                  return_true(sc, car_x);
+                }
+              sc->pc = pstart;
+              return_false(sc, car_x);
+            }}
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  if (is_symbol(arg2))
-	    {
-	      opc->v[1].p = opt_simple_symbol(sc, arg2);
-	      if (opc->v[1].p)
-		{
-		  opc->v[0].fp = (func == add_p_pp) ? opt_p_pp_fs_add : ((func == subtract_p_pp) ? opt_p_pp_fs_sub :
+        {
+          if (is_symbol(arg2))
+            {
+              opc->v[1].p = opt_simple_symbol(sc, arg2);
+              if (opc->v[1].p)
+                {
+                  opc->v[0].fp = (func == add_p_pp) ? opt_p_pp_fs_add : ((func == subtract_p_pp) ? opt_p_pp_fs_sub :
                                    ((func == vector_ref_p_pp) ? opt_p_pp_fs_vref : ((func == cons_p_pp) ? opt_p_pp_fs_cons : opt_p_pp_fs)));
-		  opc->v[4].o1 = o1;
-		  opc->v[5].fp = o1->v[0].fp;
-		  return_true(sc, car_x);
-		}
-	      sc->pc = pstart;
-	      return_false(sc, car_x);
-	    }
-	  if ((!is_pair(arg2)) ||
-	      (is_proper_quote(sc, arg2)))
-	    {
-	      if (is_t_integer(arg2))
-		{
-		  s7_p_pi_t ifunc = s7_p_pi_function(s_func);
-		  if (ifunc)
-		    {
-		      opc->v[2].i = integer(arg2);
-		      opc->v[3].p_pi_f = ifunc;
-		      if (!p_pi_fc_combinable(sc, opc))
-			{
-			  opc->v[0].fp = opt_p_pi_fc;
-			  opc->v[4].o1 = o1;
-			  opc->v[5].fp = o1->v[0].fp;
-			}
-		      return_true(sc, car_x);
-		    }}
-	      opc->v[2].p = (!is_pair(arg2)) ? arg2 : cadr(arg2);
-	      opc->v[0].fp = opt_p_pp_fc;
-	      opc->v[4].o1 = o1;
-	      opc->v[5].fp = o1->v[0].fp;
-	      return_true(sc, car_x);
-	    }
-	  opc->v[8].o1 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[10].o1 = o1;
-	      opc->v[11].fp = o1->v[0].fp;
-	      opc->v[9].fp = opc->v[8].o1->v[0].fp;
-	      opc->v[0].fp = opt_p_pp_ff;
-
-	      if ((opc->v[9].fp == opt_p_pp_sf_mul) && (opc->v[11].fp == opt_p_pp_sf_mul))
-		{
-		  if (func == add_p_pp) opc->v[0].fp = opt_p_pp_ff_add_mul_mul;
-		  else if (func == subtract_p_pp) opc->v[0].fp = opt_p_pp_ff_sub_mul_mul;
-		}
-	      check_opc_vector_wraps(opc);
-	      return_true(sc, car_x);
-	    }}}
+                  opc->v[4].o1 = o1;
+                  opc->v[5].fp = o1->v[0].fp;
+                  return_true(sc, car_x);
+                }
+              sc->pc = pstart;
+              return_false(sc, car_x);
+            }
+          if ((!is_pair(arg2)) ||
+              (is_proper_quote(sc, arg2)))
+            {
+              if (is_t_integer(arg2))
+                {
+                  s7_p_pi_t ifunc = s7_p_pi_function(s_func);
+                  if (ifunc)
+                    {
+                      opc->v[2].i = integer(arg2);
+                      opc->v[3].p_pi_f = ifunc;
+                      if (!p_pi_fc_combinable(sc, opc))
+                        {
+                          opc->v[0].fp = opt_p_pi_fc;
+                          opc->v[4].o1 = o1;
+                          opc->v[5].fp = o1->v[0].fp;
+                        }
+                      return_true(sc, car_x);
+                    }}
+              opc->v[2].p = (!is_pair(arg2)) ? arg2 : cadr(arg2);
+              opc->v[0].fp = opt_p_pp_fc;
+              opc->v[4].o1 = o1;
+              opc->v[5].fp = o1->v[0].fp;
+              return_true(sc, car_x);
+            }
+          opc->v[8].o1 = sc->opts[sc->pc];
+          if (cell_optimize(sc, cddr(car_x)))
+            {
+              opc->v[10].o1 = o1;
+              opc->v[11].fp = o1->v[0].fp;
+              opc->v[9].fp = opc->v[8].o1->v[0].fp;
+              opc->v[0].fp = opt_p_pp_ff;
+
+              if ((opc->v[9].fp == opt_p_pp_sf_mul) && (opc->v[11].fp == opt_p_pp_sf_mul))
+                {
+                  if (func == add_p_pp) opc->v[0].fp = opt_p_pp_ff_add_mul_mul;
+                  else if (func == subtract_p_pp) opc->v[0].fp = opt_p_pp_ff_sub_mul_mul;
+                }
+              check_opc_vector_wraps(opc);
+              return_true(sc, car_x);
+            }}}
   sc->pc = pstart;
   return_false(sc, car_x);
 }
@@ -64112,77 +64112,77 @@ static bool p_call_pp_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_poi
       s7_pointer arg2 = caddr(car_x);
       opc->v[3].call = cf_call(sc, car_x, s_func, 2);
       if ((is_code_constant(sc, arg1)) && (is_code_constant(sc, arg2)))
-	{
-	  opc->v[0].fp = opt_p_call_cc;
-	  opc->v[1].p = (is_pair(arg1)) ? cadr(arg1) : arg1;
-	  opc->v[2].p = (is_pair(arg2)) ? cadr(arg2) : arg2;
-	  return_true(sc, car_x);
-	}
+        {
+          opc->v[0].fp = opt_p_call_cc;
+          opc->v[1].p = (is_pair(arg1)) ? cadr(arg1) : arg1;
+          opc->v[2].p = (is_pair(arg2)) ? cadr(arg2) : arg2;
+          return_true(sc, car_x);
+        }
       if (is_symbol(arg1))
-	{
-	  opc->v[1].p = s7_slot(sc, arg1);
-	  if ((is_slot(opc->v[1].p)) &&
-	      (!has_methods(slot_value(opc->v[1].p))))
-	    {
-	      if (is_symbol(arg2))
-		{
-		  opc->v[2].p = opt_simple_symbol(sc, arg2);
-		  if (opc->v[2].p)
-		    {
-		      opc->v[0].fp = opt_p_call_ss;
-		      return_true(sc, car_x);
-		    }
-		  sc->pc = pstart;
-		  return_false(sc, car_x);
-		}
-	      if (!is_pair(arg2))
-		{
-		  opc->v[2].p = arg2;
-		  opc->v[0].fp = opt_p_call_sc;
-		  return_true(sc, car_x);
-		}
-	      if (cell_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[10].o1 = sc->opts[pstart];
-		  opc->v[11].fp = opc->v[10].o1->v[0].fp;
-		  opc->v[0].fp = opt_p_call_sf;
-		  return_true(sc, car_x);
-		}}
-	  else
-	    {
-	      sc->pc = pstart;
-	      return_false(sc, car_x);
-	    }}
+        {
+          opc->v[1].p = s7_slot(sc, arg1);
+          if ((is_slot(opc->v[1].p)) &&
+              (!has_methods(slot_value(opc->v[1].p))))
+            {
+              if (is_symbol(arg2))
+                {
+                  opc->v[2].p = opt_simple_symbol(sc, arg2);
+                  if (opc->v[2].p)
+                    {
+                      opc->v[0].fp = opt_p_call_ss;
+                      return_true(sc, car_x);
+                    }
+                  sc->pc = pstart;
+                  return_false(sc, car_x);
+                }
+              if (!is_pair(arg2))
+                {
+                  opc->v[2].p = arg2;
+                  opc->v[0].fp = opt_p_call_sc;
+                  return_true(sc, car_x);
+                }
+              if (cell_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[10].o1 = sc->opts[pstart];
+                  opc->v[11].fp = opc->v[10].o1->v[0].fp;
+                  opc->v[0].fp = opt_p_call_sf;
+                  return_true(sc, car_x);
+                }}
+          else
+            {
+              sc->pc = pstart;
+              return_false(sc, car_x);
+            }}
       opc->v[10].o1 = sc->opts[sc->pc];
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[11].fp = opc->v[10].o1->v[0].fp;
-	  if (is_symbol(arg2))
-	    {
-	      opc->v[1].p = opt_simple_symbol(sc, arg2);
-	      if (opc->v[1].p)
-		{
-		  opc->v[0].fp = opt_p_call_fs;
-		  return_true(sc, car_x);
-		}
-	      sc->pc = pstart;
-	      return_false(sc, car_x);
-	    }
-	  if ((!is_pair(arg2)) || (is_proper_quote(sc, arg2))) /* (char-ci<? (null? i) (quote . let)) t101-43.scm */
-	    {
-	      opc->v[0].fp = opt_p_call_fc;
-	      opc->v[2].p = (is_pair(arg2)) ? cadr(arg2) : arg2;
-	      check_opc_vector_wraps(opc);
-	      return_true(sc, car_x);
-	    }
-	  opc->v[8].o1 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[9].fp = opc->v[8].o1->v[0].fp;
-	      opc->v[0].fp = opt_p_call_ff;
-	      check_opc_vector_wraps(opc);
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opc->v[11].fp = opc->v[10].o1->v[0].fp;
+          if (is_symbol(arg2))
+            {
+              opc->v[1].p = opt_simple_symbol(sc, arg2);
+              if (opc->v[1].p)
+                {
+                  opc->v[0].fp = opt_p_call_fs;
+                  return_true(sc, car_x);
+                }
+              sc->pc = pstart;
+              return_false(sc, car_x);
+            }
+          if ((!is_pair(arg2)) || (is_proper_quote(sc, arg2))) /* (char-ci<? (null? i) (quote . let)) t101-43.scm */
+            {
+              opc->v[0].fp = opt_p_call_fc;
+              opc->v[2].p = (is_pair(arg2)) ? cadr(arg2) : arg2;
+              check_opc_vector_wraps(opc);
+              return_true(sc, car_x);
+            }
+          opc->v[8].o1 = sc->opts[sc->pc];
+          if (cell_optimize(sc, cddr(car_x)))
+            {
+              opc->v[9].fp = opc->v[8].o1->v[0].fp;
+              opc->v[0].fp = opt_p_call_ff;
+              check_opc_vector_wraps(opc);
+              return_true(sc, car_x);
+            }}}
   sc->pc = pstart;
   return_false(sc, car_x);
 }
@@ -64213,7 +64213,7 @@ static s7_pointer opt_p_pip_sff_lset(opt_info *o)
 static s7_pointer opt_p_pip_sso(opt_info *o)
 {
   return(o->v[5].p_pip_f(o->sc, slot_value(o->v[1].p), integer(slot_value(o->v[2].p)),
-			o->v[6].p_pi_f(o->sc, slot_value(o->v[3].p), integer(slot_value(o->v[4].p)))));
+                        o->v[6].p_pi_f(o->sc, slot_value(o->v[3].p), integer(slot_value(o->v[4].p)))));
 }
 
 static s7_pointer opt_p_pip_ssf1(opt_info *o)
@@ -64229,26 +64229,26 @@ static bool p_pip_ssf_combinable(s7_scheme *sc, opt_info *opc, int32_t start)
     {
       o1 = sc->opts[sc->pc - 1];
       if ((o1->v[0].fp == opt_p_pi_ss) || (o1->v[0].fp == opt_p_pi_ss_sref) || (o1->v[0].fp == opt_p_pi_ss_vref) ||
-	  (o1->v[0].fp == opt_p_pi_ss_sref_direct) || (o1->v[0].fp == opt_p_pi_ss_vref_direct) ||
-	  (o1->v[0].fp == opt_p_pi_ss_fvref_direct) || (o1->v[0].fp == opt_p_pi_ss_ivref_direct) ||
-	  (o1->v[0].fp == opt_p_pi_ss_pref))
-	{
-	  opc->v[5].p_pip_f = opc->v[3].p_pip_f;
-	  opc->v[6].p_pi_f = o1->v[3].p_pi_f;
-	  opc->v[3].p = o1->v[1].p;
-	  opc->v[4].p = o1->v[2].p;
-	  opc->v[0].fp = opt_p_pip_sso;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}
+          (o1->v[0].fp == opt_p_pi_ss_sref_direct) || (o1->v[0].fp == opt_p_pi_ss_vref_direct) ||
+          (o1->v[0].fp == opt_p_pi_ss_fvref_direct) || (o1->v[0].fp == opt_p_pi_ss_ivref_direct) ||
+          (o1->v[0].fp == opt_p_pi_ss_pref))
+        {
+          opc->v[5].p_pip_f = opc->v[3].p_pip_f;
+          opc->v[6].p_pi_f = o1->v[3].p_pi_f;
+          opc->v[3].p = o1->v[1].p;
+          opc->v[4].p = o1->v[2].p;
+          opc->v[0].fp = opt_p_pip_sso;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }
       if (o1->v[0].fp == opt_p_p_c)
-	{
-	  opc->v[5].p_p_f = o1->v[2].p_p_f;
-	  opc->v[4].p = o1->v[1].p;
-	  backup_pc(sc);
-	  opc->v[0].fp = opt_p_pip_c;
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[5].p_p_f = o1->v[2].p_p_f;
+          opc->v[4].p = o1->v[1].p;
+          backup_pc(sc);
+          opc->v[0].fp = opt_p_pip_c;
+          return_true(sc, NULL);
+        }}
   o1 = sc->opts[start];
   if (o1->v[0].fp != opt_p_p_f)
     return_false(sc, NULL);
@@ -64290,17 +64290,17 @@ static bool p_pip_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       (checker))
     {
       if ((is_t_vector(obj)) && (checker == sc->is_vector_symbol))
-	opc->v[3].p_pip_f = (is_typed_vector(obj)) ? typed_vector_set_p_pip_unchecked : vector_set_p_pip_unchecked;
+        opc->v[3].p_pip_f = (is_typed_vector(obj)) ? typed_vector_set_p_pip_unchecked : vector_set_p_pip_unchecked;
       else
-	if ((is_pair(obj)) && (checker == sc->is_pair_symbol)) /* avoid dumb mismatch in val_type and sig below, #t integer:any? and integer? integer:any? */
-	  opc->v[3].p_pip_f = s7_p_pip_unchecked_function(s_func);
-	else
-	  if ((val_type == cadddr(sig)) &&
-	      (((is_string(obj)) && (checker == sc->is_string_symbol)) ||
-	       ((is_float_vector(obj)) && (checker == sc->is_float_vector_symbol)) ||
-	       ((is_int_vector(obj)) && (checker == sc->is_int_vector_symbol)) ||
-	       ((is_byte_vector(obj)) && (checker == sc->is_byte_vector_symbol))))
-	    opc->v[3].p_pip_f = s7_p_pip_unchecked_function(s_func);
+        if ((is_pair(obj)) && (checker == sc->is_pair_symbol)) /* avoid dumb mismatch in val_type and sig below, #t integer:any? and integer? integer:any? */
+          opc->v[3].p_pip_f = s7_p_pip_unchecked_function(s_func);
+        else
+          if ((val_type == cadddr(sig)) &&
+              (((is_string(obj)) && (checker == sc->is_string_symbol)) ||
+               ((is_float_vector(obj)) && (checker == sc->is_float_vector_symbol)) ||
+               ((is_int_vector(obj)) && (checker == sc->is_int_vector_symbol)) ||
+               ((is_byte_vector(obj)) && (checker == sc->is_byte_vector_symbol))))
+            opc->v[3].p_pip_f = s7_p_pip_unchecked_function(s_func);
     }
   if (is_symbol(caddr(car_x)))
     {
@@ -64308,78 +64308,78 @@ static bool p_pip_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       s7_pointer arg3 = cadddr(car_x); /* see val_type above */
       s7_pointer slot2 = opt_integer_symbol(sc, caddr(car_x));
       if (slot2)
-	{
-	  opc->v[2].p = slot2;
-	  if (has_loop_end(slot2))
-	    switch (type(obj))
-	      {
-	      case T_VECTOR:
-		if (loop_end(slot2) <= vector_length(obj))
-		  opc->v[3].p_pip_f = (is_typed_vector(obj)) ? typed_t_vector_set_p_pip_direct : t_vector_set_p_pip_direct;
-		break;
-	      case T_BYTE_VECTOR:
-		if ((val_type != sc->is_integer_symbol) && (val_type != sc->is_byte_symbol)) return_false(sc, car_x);
-		if (loop_end(slot2) <= vector_length(obj))
-		  opc->v[3].p_pip_f = byte_vector_set_p_pip_direct;
-		break;
-	      case T_INT_VECTOR:
-		if ((val_type != sc->is_integer_symbol) && (val_type != sc->is_byte_symbol)) return_false(sc, car_x);
-		if (loop_end(slot2) <= vector_length(obj))
-		  opc->v[3].p_pip_f = int_vector_set_p_pip_direct;
-		break;
-	      case T_FLOAT_VECTOR:
-		if ((val_type != sc->is_float_symbol) && (val_type != sc->is_real_symbol)) return_false(sc, car_x);
-		if (loop_end(slot2) <= vector_length(obj))
-		  opc->v[3].p_pip_f = float_vector_set_p_pip_direct;
-		break;
-	      case T_STRING:
-		if (loop_end(slot2) <= string_length(obj))
-		  opc->v[3].p_pip_f = string_set_p_pip_direct;
-		break;
-	      } /* T_PAIR here would require list_length check which sort of defeats the purpose */
-
-	  if (is_symbol(arg3))
-	    {
-	      s7_pointer val_slot = opt_simple_symbol(sc, arg3);
-	      /* TODO: for int|byte|float-vector and string need opt_arg_type check?? see val_type above, if vector-set! but have int-vector sig is wrong */
-	      if (val_slot)
-		{
-		  opc->v[4].p_pip_f = opc->v[3].p_pip_f;
-		  opc->v[3].p = val_slot;
-		  opc->v[0].fp = (opc->v[4].p_pip_f == vector_set_p_pip_unchecked) ? opt_p_pip_sss_vset : opt_p_pip_sss;
-		  return_true(sc, car_x);
-		}}
-	  else
-	    if ((!is_pair(arg3)) ||
-		(is_proper_quote(sc, arg3)))
-	      {
-		opc->v[4].p = (is_pair(arg3)) ? cadr(arg3) : arg3;
-		opc->v[0].fp = opt_p_pip_ssc;
-		return_true(sc, car_x);
-	      }
-	  if (cell_optimize(sc, cdddr(car_x)))
-	    {
-	      if (p_pip_ssf_combinable(sc, opc, start))
-		return_true(sc, car_x);
-	      opc->v[0].fp = (opc->v[3].p_pip_f == string_set_p_pip_direct) ? opt_p_pip_ssf_sset :
+        {
+          opc->v[2].p = slot2;
+          if (has_loop_end(slot2))
+            switch (type(obj))
+              {
+              case T_VECTOR:
+                if (loop_end(slot2) <= vector_length(obj))
+                  opc->v[3].p_pip_f = (is_typed_vector(obj)) ? typed_t_vector_set_p_pip_direct : t_vector_set_p_pip_direct;
+                break;
+              case T_BYTE_VECTOR:
+                if ((val_type != sc->is_integer_symbol) && (val_type != sc->is_byte_symbol)) return_false(sc, car_x);
+                if (loop_end(slot2) <= vector_length(obj))
+                  opc->v[3].p_pip_f = byte_vector_set_p_pip_direct;
+                break;
+              case T_INT_VECTOR:
+                if ((val_type != sc->is_integer_symbol) && (val_type != sc->is_byte_symbol)) return_false(sc, car_x);
+                if (loop_end(slot2) <= vector_length(obj))
+                  opc->v[3].p_pip_f = int_vector_set_p_pip_direct;
+                break;
+              case T_FLOAT_VECTOR:
+                if ((val_type != sc->is_float_symbol) && (val_type != sc->is_real_symbol)) return_false(sc, car_x);
+                if (loop_end(slot2) <= vector_length(obj))
+                  opc->v[3].p_pip_f = float_vector_set_p_pip_direct;
+                break;
+              case T_STRING:
+                if (loop_end(slot2) <= string_length(obj))
+                  opc->v[3].p_pip_f = string_set_p_pip_direct;
+                break;
+              } /* T_PAIR here would require list_length check which sort of defeats the purpose */
+
+          if (is_symbol(arg3))
+            {
+              s7_pointer val_slot = opt_simple_symbol(sc, arg3);
+              /* TODO: for int|byte|float-vector and string need opt_arg_type check?? see val_type above, if vector-set! but have int-vector sig is wrong */
+              if (val_slot)
+                {
+                  opc->v[4].p_pip_f = opc->v[3].p_pip_f;
+                  opc->v[3].p = val_slot;
+                  opc->v[0].fp = (opc->v[4].p_pip_f == vector_set_p_pip_unchecked) ? opt_p_pip_sss_vset : opt_p_pip_sss;
+                  return_true(sc, car_x);
+                }}
+          else
+            if ((!is_pair(arg3)) ||
+                (is_proper_quote(sc, arg3)))
+              {
+                opc->v[4].p = (is_pair(arg3)) ? cadr(arg3) : arg3;
+                opc->v[0].fp = opt_p_pip_ssc;
+                return_true(sc, car_x);
+              }
+          if (cell_optimize(sc, cdddr(car_x)))
+            {
+              if (p_pip_ssf_combinable(sc, opc, start))
+                return_true(sc, car_x);
+              opc->v[0].fp = (opc->v[3].p_pip_f == string_set_p_pip_direct) ? opt_p_pip_ssf_sset :
                                ((opc->v[3].p_pip_f == vector_set_p_pip_unchecked) ? opt_p_pip_ssf_vset : opt_p_pip_ssf);
-	      opc->v[4].o1 = sc->opts[start];
-	      opc->v[5].fp = sc->opts[start]->v[0].fp;
-	      return_true(sc, car_x);
-	    }}}
+              opc->v[4].o1 = sc->opts[start];
+              opc->v[5].fp = sc->opts[start]->v[0].fp;
+              return_true(sc, car_x);
+            }}}
   else /* not symbol caddr */
     {
       opc->v[10].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, cddr(car_x)))
-	{
-	  opc->v[8].o1 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cdddr(car_x)))
-	    {
-	      opc->v[0].fp = (opc->v[3].p_pip_f == list_set_p_pip_unchecked) ? opt_p_pip_sff_lset : opt_p_pip_sff;
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      opc->v[9].fp = opc->v[8].o1->v[0].fp;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opc->v[8].o1 = sc->opts[sc->pc];
+          if (cell_optimize(sc, cdddr(car_x)))
+            {
+              opc->v[0].fp = (opc->v[3].p_pip_f == list_set_p_pip_unchecked) ? opt_p_pip_sff_lset : opt_p_pip_sff;
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              opc->v[9].fp = opc->v[8].o1->v[0].fp;
+              return_true(sc, car_x);
+            }}}
   return_false(sc, car_x);
 }
 
@@ -64420,19 +64420,19 @@ static bool p_piip_to_sx(s7_scheme *sc, opt_info *opc, s7_pointer indexp1, s7_po
     {
       opc->v[2].p = slot;
       if ((is_symbol(car(valp))) ||
-	  (is_unquoted_pair(car(valp))))
-	{
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (!cell_optimize(sc, valp))
-	    return_false(sc, indexp1);
-	  opc->v[11].fp = opc->v[10].o1->v[0].fp;
-	  opc->v[0].fp = opt_p_piip_sssf;
-	  if ((is_t_vector(obj)) &&
-	      (loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
-	      (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
-	    opc->v[0].fp = vector_set_piip_sssf_unchecked;
-	  return_true(sc, NULL);
-	}
+          (is_unquoted_pair(car(valp))))
+        {
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (!cell_optimize(sc, valp))
+            return_false(sc, indexp1);
+          opc->v[11].fp = opc->v[10].o1->v[0].fp;
+          opc->v[0].fp = opt_p_piip_sssf;
+          if ((is_t_vector(obj)) &&
+              (loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
+              (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
+            opc->v[0].fp = vector_set_piip_sssf_unchecked;
+          return_true(sc, NULL);
+        }
       opc->v[0].fp = opt_p_piip_sssc;
       opc->v[4].p = (is_pair(car(valp))) ? cadar(valp) : car(valp);
       return_true(sc, NULL);
@@ -64442,16 +64442,16 @@ static bool p_piip_to_sx(s7_scheme *sc, opt_info *opc, s7_pointer indexp1, s7_po
     {
       opc->v[8].o1 = sc->opts[sc->pc];
       if (int_optimize(sc, indexp2))
-	{
-	  opc->v[4].o1 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, valp))
-	    {
-	      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-	      opc->v[9].fi = opc->v[8].o1->v[0].fi;
-	      opc->v[3].fp = opc->v[4].o1->v[0].fp;
-	      opc->v[0].fp = opt_p_piip_sfff;
-	      return_true(sc, NULL);
-	    }}}
+        {
+          opc->v[4].o1 = sc->opts[sc->pc];
+          if (cell_optimize(sc, valp))
+            {
+              opc->v[11].fi = opc->v[10].o1->v[0].fi;
+              opc->v[9].fi = opc->v[8].o1->v[0].fi;
+              opc->v[3].fp = opc->v[4].o1->v[0].fp;
+              opc->v[0].fp = opt_p_piip_sfff;
+              return_true(sc, NULL);
+            }}}
   return_false(sc, NULL);
 }
 
@@ -64463,17 +64463,17 @@ static bool p_piip_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointe
       s7_pointer obj;
       s7_pointer slot1 = s7_slot(sc, cadr(car_x));
       if (!is_slot(slot1))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       obj = slot_value(slot1);
       if ((has_methods(obj)) || (is_immutable(obj)))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       if ((is_any_vector(obj)) && /* vector_set_p_piip calls vector_setter(obj) */
-	  (vector_rank(obj) == 2))
-	{
-	  opc->v[1].p = slot1;
-	  opc->v[5].p_piip_f = vector_set_p_piip;
-	  return(p_piip_to_sx(sc, opc, cddr(car_x), cdddr(car_x), cddddr(car_x), obj));
-	}}
+          (vector_rank(obj) == 2))
+        {
+          opc->v[1].p = slot1;
+          opc->v[5].p_piip_f = vector_set_p_piip;
+          return(p_piip_to_sx(sc, opc, cddr(car_x), cdddr(car_x), cddddr(car_x), obj));
+        }}
   return_false(sc, car_x);
 }
 
@@ -64505,42 +64505,42 @@ static bool p_pii_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       s7_pointer obj;
       s7_pointer slot1 = s7_slot(sc, cadr(car_x));
       if (!is_slot(slot1))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       obj = slot_value(slot1);
       if ((has_methods(obj)) || (is_immutable(obj)))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       if ((is_t_vector(obj)) &&
-	  (vector_rank(obj) == 2))
-	{
-	  s7_pointer slot, indexp1 = cddr(car_x), indexp2 = cdddr(car_x);
-	  opc->v[1].p = slot1;
-	  opc->v[4].p_pii_f = vector_ref_p_pii;
-	  slot = opt_integer_symbol(sc, car(indexp2));
-	  if (slot)
-	    {
-	      opc->v[3].p = slot;
-	      slot = opt_integer_symbol(sc, car(indexp1));
-	      if (slot)
-		{
-		  opc->v[2].p = slot;
-		  opc->v[0].fp = opt_p_pii_sss;
-		  /* normal vector rank 2 (see above) */
-		  if ((loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
-		      (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
-		    opc->v[0].fp = vector_ref_pii_sss_unchecked;
-		  return_true(sc, car_x);
-		}}
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, indexp1))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, indexp2))
-		{
-		  opc->v[0].fp = opt_p_pii_sff;
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[9].fi = opc->v[8].o1->v[0].fi;
-		  return_true(sc, car_x);
-		}}}}
+          (vector_rank(obj) == 2))
+        {
+          s7_pointer slot, indexp1 = cddr(car_x), indexp2 = cdddr(car_x);
+          opc->v[1].p = slot1;
+          opc->v[4].p_pii_f = vector_ref_p_pii;
+          slot = opt_integer_symbol(sc, car(indexp2));
+          if (slot)
+            {
+              opc->v[3].p = slot;
+              slot = opt_integer_symbol(sc, car(indexp1));
+              if (slot)
+                {
+                  opc->v[2].p = slot;
+                  opc->v[0].fp = opt_p_pii_sss;
+                  /* normal vector rank 2 (see above) */
+                  if ((loop_end_fits(opc->v[2].p, vector_dimension(slot_value(opc->v[1].p), 0))) &&
+                      (loop_end_fits(opc->v[3].p, vector_dimension(slot_value(opc->v[1].p), 1))))
+                    opc->v[0].fp = vector_ref_pii_sss_unchecked;
+                  return_true(sc, car_x);
+                }}
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, indexp1))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, indexp2))
+                {
+                  opc->v[0].fp = opt_p_pii_sff;
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[9].fi = opc->v[8].o1->v[0].fi;
+                  return_true(sc, car_x);
+                }}}}
   return_false(sc, car_x);
 }
 
@@ -64561,14 +64561,14 @@ static bool p_ppi_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
     {
       s7_pointer slot = opt_simple_symbol(sc, caddr(car_x));
       if (slot)
-	{
-	  opc->v[2].p = cadr(car_x);
-	  opc->v[1].p = slot;
-	  opc->v[0].fp = (ifunc == char_position_p_ppi) ? opt_p_ppi_psf_cpos : opt_p_ppi_psf;
-	  opc->v[4].o1 = sc->opts[start];
-	  opc->v[5].fi = sc->opts[start]->v[0].fi;
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[2].p = cadr(car_x);
+          opc->v[1].p = slot;
+          opc->v[0].fp = (ifunc == char_position_p_ppi) ? opt_p_ppi_psf_cpos : opt_p_ppi_psf;
+          opc->v[4].o1 = sc->opts[start];
+          opc->v[5].fi = sc->opts[start]->v[0].fi;
+          return_true(sc, car_x);
+        }}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -64662,154 +64662,154 @@ static bool p_ppp_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       opt_info *o1;
       s7_pointer slot = s7_slot(sc, arg1);
       if ((!is_slot(slot)) ||
-	  (has_methods(slot_value(slot))))
-	return_false(sc, car_x);
+          (has_methods(slot_value(slot))))
+        return_false(sc, car_x);
 
       obj = slot_value(slot);
       if ((is_any_vector(obj)) &&
-	  (vector_rank(obj) > 1))
-	return_false(sc, car_x);
+          (vector_rank(obj) > 1))
+        return_false(sc, car_x);
 
       if (is_target_or_its_alias(car(car_x), s_func, sc->hash_table_set_symbol))
-	{
-	  if ((!is_hash_table(obj)) || (is_immutable_hash_table(obj)))
-	    return_false(sc, car_x);
-	}
+        {
+          if ((!is_hash_table(obj)) || (is_immutable_hash_table(obj)))
+            return_false(sc, car_x);
+        }
       else
-	if ((is_target_or_its_alias(car(car_x), s_func, sc->let_set_symbol)) &&
-	    ((!is_let(obj)) || (is_immutable(obj))))
-	  return_false(sc, car_x);
+        if ((is_target_or_its_alias(car(car_x), s_func, sc->let_set_symbol)) &&
+            ((!is_let(obj)) || (is_immutable(obj))))
+          return_false(sc, car_x);
 
       opc->v[1].p = slot;
 
       if ((func == hash_table_set_p_ppp) && (is_hash_table(obj)))
-	opc->v[3].p_ppp_f = s7_hash_table_set;
+        opc->v[3].p_ppp_f = s7_hash_table_set;
 
       if (is_symbol(arg2))
-	{
-	  if ((is_keyword(arg2)) && (is_symbol(arg3)) && (is_let(obj)) && (opc->v[3].p_ppp_f == let_set_2))
-	    {
-	      s7_pointer val_slot = opt_simple_symbol(sc, arg3);
-	      if ((val_slot) && (use_pps_slot_set(sc, opc, obj, keyword_symbol(arg2), val_slot)))
-		return_true(sc, car_x);
-	    }
-	  slot = opt_simple_symbol(sc, arg2);
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      arg2 = slot_value(slot);
-	      if (is_symbol(arg3))
-		{
-		  slot = opt_simple_symbol(sc, arg3);
-		  if (slot)
-		    {
-		      s7_p_ppp_t func1 = opc->v[3].p_ppp_f;
-		      opc->v[4].p_ppp_f = func1;
-		      opc->v[3].p = slot;
-		      opc->v[0].fp = (func1 == multiply_p_ppp) ? opt_p_ppp_sss_mul : ((func1 == s7_hash_table_set) ? opt_p_ppp_sss_hset : opt_p_ppp_sss);
-		      return_true(sc, car_x);
-		    }}
-	      else
-		if ((!is_pair(arg3)) ||
-		    (is_proper_quote(sc, arg3)))
-		  {
-		    opc->v[4].p = (is_pair(arg3)) ? cadr(arg3) : arg3;
-		    opc->v[0].fp = opt_p_ppp_ssc;
-		    if ((is_let(obj)) && (opc->v[3].p_ppp_f == let_set_2) && (is_symbol(arg2))) /* (let-set! L3 :x 0) */
-		      use_ppc_slot_set(sc, opc, obj, (is_keyword(arg2)) ? keyword_symbol(arg2) : arg2, opc->v[4].p);
-		    return_true(sc, car_x);
-		  }
-	      if (optimize_op(car_x) == HOP_HASH_TABLE_INCREMENT)
-		{
-		  opc->v[0].fp = opt_p_ppp_hash_table_increment;
-		  opc->v[5].p = car_x;
-		  return_true(sc, car_x);
-		}
-	      if (cell_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[4].o1 = sc->opts[start];
-		  opc->v[5].fp = opc->v[4].o1->v[0].fp;
-		  opc->v[0].fp = opt_p_ppp_ssf;
-		  if ((is_let(obj)) && (is_symbol_and_keyword(arg2)) && (opc->v[3].p_ppp_f == let_set_2)) /* (let-set! L3 :x (+ (L3 'x) 1)) */
-		    use_ppf_slot_set(sc, opc, obj, keyword_symbol(arg2));
-		  return_true(sc, car_x);
-		}
-	      sc->pc = start;
-	    }}
+        {
+          if ((is_keyword(arg2)) && (is_symbol(arg3)) && (is_let(obj)) && (opc->v[3].p_ppp_f == let_set_2))
+            {
+              s7_pointer val_slot = opt_simple_symbol(sc, arg3);
+              if ((val_slot) && (use_pps_slot_set(sc, opc, obj, keyword_symbol(arg2), val_slot)))
+                return_true(sc, car_x);
+            }
+          slot = opt_simple_symbol(sc, arg2);
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              arg2 = slot_value(slot);
+              if (is_symbol(arg3))
+                {
+                  slot = opt_simple_symbol(sc, arg3);
+                  if (slot)
+                    {
+                      s7_p_ppp_t func1 = opc->v[3].p_ppp_f;
+                      opc->v[4].p_ppp_f = func1;
+                      opc->v[3].p = slot;
+                      opc->v[0].fp = (func1 == multiply_p_ppp) ? opt_p_ppp_sss_mul : ((func1 == s7_hash_table_set) ? opt_p_ppp_sss_hset : opt_p_ppp_sss);
+                      return_true(sc, car_x);
+                    }}
+              else
+                if ((!is_pair(arg3)) ||
+                    (is_proper_quote(sc, arg3)))
+                  {
+                    opc->v[4].p = (is_pair(arg3)) ? cadr(arg3) : arg3;
+                    opc->v[0].fp = opt_p_ppp_ssc;
+                    if ((is_let(obj)) && (opc->v[3].p_ppp_f == let_set_2) && (is_symbol(arg2))) /* (let-set! L3 :x 0) */
+                      use_ppc_slot_set(sc, opc, obj, (is_keyword(arg2)) ? keyword_symbol(arg2) : arg2, opc->v[4].p);
+                    return_true(sc, car_x);
+                  }
+              if (optimize_op(car_x) == HOP_HASH_TABLE_INCREMENT)
+                {
+                  opc->v[0].fp = opt_p_ppp_hash_table_increment;
+                  opc->v[5].p = car_x;
+                  return_true(sc, car_x);
+                }
+              if (cell_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[4].o1 = sc->opts[start];
+                  opc->v[5].fp = opc->v[4].o1->v[0].fp;
+                  opc->v[0].fp = opt_p_ppp_ssf;
+                  if ((is_let(obj)) && (is_symbol_and_keyword(arg2)) && (opc->v[3].p_ppp_f == let_set_2)) /* (let-set! L3 :x (+ (L3 'x) 1)) */
+                    use_ppf_slot_set(sc, opc, obj, keyword_symbol(arg2));
+                  return_true(sc, car_x);
+                }
+              sc->pc = start;
+            }}
       if ((is_proper_quote(sc, arg2)) &&
-	  (is_symbol(arg3)))
-	{
-	  s7_pointer val_slot = opt_simple_symbol(sc, arg3);
-	  if (val_slot)
-	    {
-	      opc->v[2].p = cadr(arg2);
-	      opc->v[4].p = val_slot;
-	      opc->v[0].fp = opt_p_ppp_scs;
-	      if ((is_let(obj)) && (opc->v[3].p_ppp_f == let_set_2) && (is_symbol(cadr(arg2))))
-		use_pps_slot_set(sc, opc, obj, cadr(arg2), val_slot);
-	      return_true(sc, car_x);
-	    }}
+          (is_symbol(arg3)))
+        {
+          s7_pointer val_slot = opt_simple_symbol(sc, arg3);
+          if (val_slot)
+            {
+              opc->v[2].p = cadr(arg2);
+              opc->v[4].p = val_slot;
+              opc->v[0].fp = opt_p_ppp_scs;
+              if ((is_let(obj)) && (opc->v[3].p_ppp_f == let_set_2) && (is_symbol(cadr(arg2))))
+                use_pps_slot_set(sc, opc, obj, cadr(arg2), val_slot);
+              return_true(sc, car_x);
+            }}
       o1 = sc->opts[sc->pc];
       if (cell_optimize(sc, cddr(car_x)))
-	{
-	  opt_info *o2 = sc->opts[sc->pc];
-	  if (is_symbol(arg3))
-	    {
-	      s7_pointer val_slot = opt_simple_symbol(sc, arg3);
-	      if (val_slot)
-		{
-		  opc->v[2].p = val_slot;
-		  opc->v[0].fp = opt_p_ppp_sfs; /* hset case goes through the case below */
-		  opc->v[4].o1 = o1;
-		  opc->v[5].fp = o1->v[0].fp;
-		  return_true(sc, car_x);
-		}}
-	  if ((!is_pair(arg3)) && (is_let(obj)) && (is_quoted_symbol(arg2)) &&
-	      (opc->v[3].p_ppp_f == let_set_2) &&                   /* (let-set! L3 'x 0) */
-	      (use_ppc_slot_set(sc, opc, obj, cadr(arg2), arg3)))
-	    return_true(sc, car_x);
-
-	  if (cell_optimize(sc, cdddr(car_x)))
-	    {
-	      if ((is_let(obj)) && (is_quoted_symbol(arg2)) && (opc->v[3].p_ppp_f == let_set_2) && /* (let-set! L3 'x (+ (L3 'x) 1)) */
-		  (use_ppf_slot_set(sc, opc, obj, cadr(arg2))))
-		{
-		  opc->v[4].o1 = o2;
-		  opc->v[5].fp = opc->v[4].o1->v[0].fp;
-		  return_true(sc, car_x);
-		}
-	      opc->v[0].fp = opt_p_ppp_sff;
-	      opc->v[10].o1 = o1;
-	      opc->v[11].fp = o1->v[0].fp;
-	      opc->v[8].o1 = o2;
-	      opc->v[9].fp = o2->v[0].fp;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          opt_info *o2 = sc->opts[sc->pc];
+          if (is_symbol(arg3))
+            {
+              s7_pointer val_slot = opt_simple_symbol(sc, arg3);
+              if (val_slot)
+                {
+                  opc->v[2].p = val_slot;
+                  opc->v[0].fp = opt_p_ppp_sfs; /* hset case goes through the case below */
+                  opc->v[4].o1 = o1;
+                  opc->v[5].fp = o1->v[0].fp;
+                  return_true(sc, car_x);
+                }}
+          if ((!is_pair(arg3)) && (is_let(obj)) && (is_quoted_symbol(arg2)) &&
+              (opc->v[3].p_ppp_f == let_set_2) &&                   /* (let-set! L3 'x 0) */
+              (use_ppc_slot_set(sc, opc, obj, cadr(arg2), arg3)))
+            return_true(sc, car_x);
+
+          if (cell_optimize(sc, cdddr(car_x)))
+            {
+              if ((is_let(obj)) && (is_quoted_symbol(arg2)) && (opc->v[3].p_ppp_f == let_set_2) && /* (let-set! L3 'x (+ (L3 'x) 1)) */
+                  (use_ppf_slot_set(sc, opc, obj, cadr(arg2))))
+                {
+                  opc->v[4].o1 = o2;
+                  opc->v[5].fp = opc->v[4].o1->v[0].fp;
+                  return_true(sc, car_x);
+                }
+              opc->v[0].fp = opt_p_ppp_sff;
+              opc->v[10].o1 = o1;
+              opc->v[11].fp = o1->v[0].fp;
+              opc->v[8].o1 = o2;
+              opc->v[9].fp = o2->v[0].fp;
+              return_true(sc, car_x);
+            }}}
   else /* arg1 not symbol */
     {
       opc->v[10].o1 = sc->opts[start];
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  opc->v[8].o1 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[4].o1 = sc->opts[sc->pc];
-	      if (cell_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[0].fp = opt_p_ppp_fff;
-		  opc->v[11].fp = opc->v[10].o1->v[0].fp;
-		  opc->v[9].fp = opc->v[8].o1->v[0].fp;
-		  opc->v[5].fp = opc->v[4].o1->v[0].fp;
-		  if ((opc->v[3].p_ppp_f == list_p_ppp) &&
-		      (opc->v[5].fp == opt_p_c) && (opc->v[9].fp == opt_p_c) && (opc->v[11].fp == opt_p_c))
-		    {
-		      opc->v[0].fp = opt_list_3c;
-		      opc->v[4].p = opc->v[4].o1->v[1].p;
-		      opc->v[8].p = opc->v[8].o1->v[1].p;
-		      opc->v[10].p = opc->v[10].o1->v[1].p;
-		    }
-		  return_true(sc, car_x);
-		}}}}
+        {
+          opc->v[8].o1 = sc->opts[sc->pc];
+          if (cell_optimize(sc, cddr(car_x)))
+            {
+              opc->v[4].o1 = sc->opts[sc->pc];
+              if (cell_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[0].fp = opt_p_ppp_fff;
+                  opc->v[11].fp = opc->v[10].o1->v[0].fp;
+                  opc->v[9].fp = opc->v[8].o1->v[0].fp;
+                  opc->v[5].fp = opc->v[4].o1->v[0].fp;
+                  if ((opc->v[3].p_ppp_f == list_p_ppp) &&
+                      (opc->v[5].fp == opt_p_c) && (opc->v[9].fp == opt_p_c) && (opc->v[11].fp == opt_p_c))
+                    {
+                      opc->v[0].fp = opt_list_3c;
+                      opc->v[4].p = opc->v[4].o1->v[1].p;
+                      opc->v[8].p = opc->v[8].o1->v[1].p;
+                      opc->v[10].p = opc->v[10].o1->v[1].p;
+                    }
+                  return_true(sc, car_x);
+                }}}}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -64857,96 +64857,96 @@ static bool p_call_ppp_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_po
       opt_info *o1 = sc->opts[sc->pc];
 
       if (!is_pair(arg1))
-	{
-	  if (is_normal_symbol(arg1))
-	    {
-	      slot = opt_simple_symbol(sc, arg1);
-	      if (slot)
-		{
-		  opc->v[1].p = slot;
-		  if ((s_func == global_value(sc->vector_ref_symbol)) &&
-		      (is_t_vector(slot_value(slot))) && (vector_rank(slot_value(slot)) != 2))
-		    return_false(sc, car_x);
-		}
-	      else return_false(sc, car_x); /* no need for sc->pc = start here, I think */
-	    }
-	  else
-	    {
-	      if ((is_code_constant(sc, arg1)) && (is_code_constant(sc, arg2)) && (is_normal_symbol(arg3)))
-		{
-		  s7_pointer val_slot = opt_simple_symbol(sc, arg3);
-		  if (val_slot)
-		    {
-		      opc->v[1].p = (is_pair(arg1)) ? cadr(arg1) : arg1;
-		      opc->v[2].p = (is_pair(arg2)) ? cadr(arg2) : arg2;
-		      opc->v[3].p = val_slot;
-		      opc->v[4].call = cf_call(sc, car_x, s_func, 3);
-		      opc->v[0].fp = opt_p_call_ccs;
-		      return_true(sc, car_x);
-		    }}
-	      opc->v[1].p = arg1;
-	      if (s_func == global_value(sc->vector_ref_symbol))
-		return_false(sc, car_x);
-	    }
-	  if (is_normal_symbol(arg2))
-	    {
-	      slot = opt_simple_symbol(sc, arg2);
-	      if (slot)
-		{
-		  opc->v[2].p = slot;
-		  if (is_normal_symbol(arg3))
-		    {
-		      slot = opt_simple_symbol(sc, arg3);
-		      if (slot)
-			{
-			  opc->v[3].p = slot;
-			  opc->v[4].call = cf_call(sc, car_x, s_func, 3);
-			  opc->v[0].fp = (is_slot(opc->v[1].p)) ? opt_p_call_sss : opt_p_call_css;
-			  return_true(sc, car_x);
-			}}
-		  else
-		    if (is_slot(opc->v[1].p))
-		      {
-			int32_t start1 = sc->pc;
-			if ((cf_call(sc, car_x, s_func, 3) == g_substring_uncopied) && /* opc->v[4].call is unsafe -- might not be set */
-			    (is_t_integer(slot_value(opc->v[2].p))) &&
-			    (is_string(slot_value(opc->v[1].p))) &&
-			    (int_optimize(sc, cdddr(car_x))))
-			  {
-			    opc->v[0].fp = opt_p_substring_uncopied_ssf;
-			    opc->v[5].o1 = o1;
-			    opc->v[6].fi = o1->v[0].fi;
-			    return_true(sc, car_x);
-			  }
-			sc->pc = start1;
-			if (cell_optimize(sc, cdddr(car_x)))
-			  {
-			    opc->v[4].call = cf_call(sc, car_x, s_func, 3);
-			    opc->v[0].fp = opt_p_call_ssf;
-			    opc->v[5].o1 = o1;
-			    opc->v[6].fp = o1->v[0].fp;
-			    return_true(sc, car_x);
-			  }}}}}
+        {
+          if (is_normal_symbol(arg1))
+            {
+              slot = opt_simple_symbol(sc, arg1);
+              if (slot)
+                {
+                  opc->v[1].p = slot;
+                  if ((s_func == global_value(sc->vector_ref_symbol)) &&
+                      (is_t_vector(slot_value(slot))) && (vector_rank(slot_value(slot)) != 2))
+                    return_false(sc, car_x);
+                }
+              else return_false(sc, car_x); /* no need for sc->pc = start here, I think */
+            }
+          else
+            {
+              if ((is_code_constant(sc, arg1)) && (is_code_constant(sc, arg2)) && (is_normal_symbol(arg3)))
+                {
+                  s7_pointer val_slot = opt_simple_symbol(sc, arg3);
+                  if (val_slot)
+                    {
+                      opc->v[1].p = (is_pair(arg1)) ? cadr(arg1) : arg1;
+                      opc->v[2].p = (is_pair(arg2)) ? cadr(arg2) : arg2;
+                      opc->v[3].p = val_slot;
+                      opc->v[4].call = cf_call(sc, car_x, s_func, 3);
+                      opc->v[0].fp = opt_p_call_ccs;
+                      return_true(sc, car_x);
+                    }}
+              opc->v[1].p = arg1;
+              if (s_func == global_value(sc->vector_ref_symbol))
+                return_false(sc, car_x);
+            }
+          if (is_normal_symbol(arg2))
+            {
+              slot = opt_simple_symbol(sc, arg2);
+              if (slot)
+                {
+                  opc->v[2].p = slot;
+                  if (is_normal_symbol(arg3))
+                    {
+                      slot = opt_simple_symbol(sc, arg3);
+                      if (slot)
+                        {
+                          opc->v[3].p = slot;
+                          opc->v[4].call = cf_call(sc, car_x, s_func, 3);
+                          opc->v[0].fp = (is_slot(opc->v[1].p)) ? opt_p_call_sss : opt_p_call_css;
+                          return_true(sc, car_x);
+                        }}
+                  else
+                    if (is_slot(opc->v[1].p))
+                      {
+                        int32_t start1 = sc->pc;
+                        if ((cf_call(sc, car_x, s_func, 3) == g_substring_uncopied) && /* opc->v[4].call is unsafe -- might not be set */
+                            (is_t_integer(slot_value(opc->v[2].p))) &&
+                            (is_string(slot_value(opc->v[1].p))) &&
+                            (int_optimize(sc, cdddr(car_x))))
+                          {
+                            opc->v[0].fp = opt_p_substring_uncopied_ssf;
+                            opc->v[5].o1 = o1;
+                            opc->v[6].fi = o1->v[0].fi;
+                            return_true(sc, car_x);
+                          }
+                        sc->pc = start1;
+                        if (cell_optimize(sc, cdddr(car_x)))
+                          {
+                            opc->v[4].call = cf_call(sc, car_x, s_func, 3);
+                            opc->v[0].fp = opt_p_call_ssf;
+                            opc->v[5].o1 = o1;
+                            opc->v[6].fp = o1->v[0].fp;
+                            return_true(sc, car_x);
+                          }}}}}
       if (s_func == global_value(sc->vector_ref_symbol))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       if (cell_optimize(sc, cdr(car_x)))
-	{
-	  opt_info *o2 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cddr(car_x)))
-	    {
-	      opt_info *o3 = sc->opts[sc->pc];
-	      if (cell_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[2].call = cf_call(sc, car_x, s_func, 3);
-		  opc->v[0].fp = opt_p_call_ppp;
-		  opc->v[3].o1 = o1;
-		  opc->v[4].fp = o1->v[0].fp;
-		  opc->v[5].o1 = o2;
-		  opc->v[6].fp = o2->v[0].fp;
-		  opc->v[10].o1 = o3;
-		  opc->v[11].fp = o3->v[0].fp;
-		  return_true(sc, car_x);
-		}}}}
+        {
+          opt_info *o2 = sc->opts[sc->pc];
+          if (cell_optimize(sc, cddr(car_x)))
+            {
+              opt_info *o3 = sc->opts[sc->pc];
+              if (cell_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[2].call = cf_call(sc, car_x, s_func, 3);
+                  opc->v[0].fp = opt_p_call_ppp;
+                  opc->v[3].o1 = o1;
+                  opc->v[4].fp = o1->v[0].fp;
+                  opc->v[5].o1 = o2;
+                  opc->v[6].fp = o2->v[0].fp;
+                  opc->v[10].o1 = o3;
+                  opc->v[11].fp = o3->v[0].fp;
+                  return_true(sc, car_x);
+                }}}}
   sc->pc = start;
   return_false(sc, car_x);
 }
@@ -64981,17 +64981,17 @@ static bool p_call_any_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_po
       s7_pointer p = cdr(car_x);      /* (vector-set! v k i 2) gets here */
       opc->v[1].i = (len - 1);
       for (int32_t pctr = P_CALL_O1; is_pair(p); pctr++, p = cdr(p))
-	{
-	  opc->v[pctr].o1 = sc->opts[sc->pc];
-	  if (!cell_optimize(sc, p))
-	    break;
-	}
+        {
+          opc->v[pctr].o1 = sc->opts[sc->pc];
+          if (!cell_optimize(sc, p))
+            break;
+        }
       if (is_null(p))
-	{
-	  opc->v[0].fp = opt_p_call_any;
-	  opc->v[2].call = cf_call(sc, car_x, s_func, len - 1);
-	  return_true(sc, car_x);
-	}}
+        {
+          opc->v[0].fp = opt_p_call_any;
+          opc->v[2].call = cf_call(sc, car_x, s_func, len - 1);
+          return_true(sc, car_x);
+        }}
   return_false(sc, car_x);
 }
 
@@ -65030,161 +65030,161 @@ static bool p_implicit_ok(s7_scheme *sc, s7_pointer s_slot, s7_pointer car_x, in
   if (len == 2)
     {
       switch (type(obj))
-	{
-	case T_PAIR:       opc->v[3].p_pi_f = list_ref_p_pi_unchecked;   break;
-	case T_HASH_TABLE: opc->v[3].p_pp_f = s7_hash_table_ref;         break;
-	case T_LET:        opc->v[3].p_pp_f = let_ref;	                 break;
-	case T_STRING:     opc->v[3].p_pi_f = string_ref_p_pi_unchecked; break;
-	case T_C_OBJECT:   return_false(sc, car_x); /* no pi_ref because ref assumes pp */
-
-	case T_VECTOR:
-	  if (vector_rank(obj) != 1)
-	    return_false(sc, car_x);
-	  opc->v[3].p_pi_f = t_vector_ref_p_pi_unchecked;
-	  break;
-
-	case T_BYTE_VECTOR:
-	case T_INT_VECTOR:
-	case T_FLOAT_VECTOR:
-	  if (vector_rank(obj) != 1)
-	    return_false(sc, car_x);
-	  opc->v[3].p_pi_f = vector_ref_p_pi_unchecked;
-	  break;
-
-	default:
-	  return_false(sc, car_x);
-	}
+        {
+        case T_PAIR:       opc->v[3].p_pi_f = list_ref_p_pi_unchecked;   break;
+        case T_HASH_TABLE: opc->v[3].p_pp_f = s7_hash_table_ref;         break;
+        case T_LET:        opc->v[3].p_pp_f = let_ref;                         break;
+        case T_STRING:     opc->v[3].p_pi_f = string_ref_p_pi_unchecked; break;
+        case T_C_OBJECT:   return_false(sc, car_x); /* no pi_ref because ref assumes pp */
+
+        case T_VECTOR:
+          if (vector_rank(obj) != 1)
+            return_false(sc, car_x);
+          opc->v[3].p_pi_f = t_vector_ref_p_pi_unchecked;
+          break;
+
+        case T_BYTE_VECTOR:
+        case T_INT_VECTOR:
+        case T_FLOAT_VECTOR:
+          if (vector_rank(obj) != 1)
+            return_false(sc, car_x);
+          opc->v[3].p_pi_f = vector_ref_p_pi_unchecked;
+          break;
+
+        default:
+          return_false(sc, car_x);
+        }
       /* now v3.p_pi|pp.f is set */
       if (is_symbol(arg1))
-	{
-	  s7_pointer slot = s7_slot(sc, arg1); /* not the desired slot if let+keyword, see below */
-	  if (is_slot(slot))
-	    {
-	      opc->v[2].p = slot;
-	      if ((!is_hash_table(obj)) && /* these because opt_int below */
-		  (!is_let(obj)))
-		{
-		  if (!is_t_integer(slot_value(slot)))
-		    return_false(sc, car_x); /* I think this reflects that a non-int index is an error for list-ref et al */
-		  opc->v[0].fp = opt_p_pi_ss;
-		  if (has_loop_end(opc->v[2].p))
-		    check_unchecked(sc, obj, opc->v[2].p, opc, NULL);
-		  fixup_p_pi_ss(opc);
-		  return_true(sc, car_x);
-		}
-	      opc->v[0].fp = ((is_hash_table(obj)) && (opc->v[3].p_pp_f == s7_hash_table_ref)) ? opt_p_pp_ss_href :
-		              (((is_let(obj)) && (opc->v[3].p_pp_f == let_ref)) ? opt_p_pp_ss_lref :  opt_p_pp_ss);
-	      if ((opc->v[0].fp == opt_p_pp_ss_lref) && (is_keyword(arg1)))
-		use_slot_ref(sc, opc, obj, keyword_symbol(arg1));  /* if keyword, slot is: (L3 :x) -> #<slot: :x :x> */
-	      return_true(sc, car_x);
-	    }}
+        {
+          s7_pointer slot = s7_slot(sc, arg1); /* not the desired slot if let+keyword, see below */
+          if (is_slot(slot))
+            {
+              opc->v[2].p = slot;
+              if ((!is_hash_table(obj)) && /* these because opt_int below */
+                  (!is_let(obj)))
+                {
+                  if (!is_t_integer(slot_value(slot)))
+                    return_false(sc, car_x); /* I think this reflects that a non-int index is an error for list-ref et al */
+                  opc->v[0].fp = opt_p_pi_ss;
+                  if (has_loop_end(opc->v[2].p))
+                    check_unchecked(sc, obj, opc->v[2].p, opc, NULL);
+                  fixup_p_pi_ss(opc);
+                  return_true(sc, car_x);
+                }
+              opc->v[0].fp = ((is_hash_table(obj)) && (opc->v[3].p_pp_f == s7_hash_table_ref)) ? opt_p_pp_ss_href :
+                              (((is_let(obj)) && (opc->v[3].p_pp_f == let_ref)) ? opt_p_pp_ss_lref :  opt_p_pp_ss);
+              if ((opc->v[0].fp == opt_p_pp_ss_lref) && (is_keyword(arg1)))
+                use_slot_ref(sc, opc, obj, keyword_symbol(arg1));  /* if keyword, slot is: (L3 :x) -> #<slot: :x :x> */
+              return_true(sc, car_x);
+            }}
       else /* arg1 not a symbol */
-	{
-	  if ((!is_hash_table(obj)) &&
-	      (!is_let(obj)))
-	    {
-	      opt_info *o1;
-	      if (is_t_integer(arg1))
-		{
-		  opc->v[2].i = integer(arg1);
-		  opc->v[0].fp = opt_p_pi_sc;
-		  return_true(sc, car_x);
-		}
-	      o1 = sc->opts[sc->pc];
-	      if (!int_optimize(sc, cdr(car_x)))
-		return_false(sc, car_x);
-	      opc->v[0].fp = opt_p_pi_sf;
-	      opc->v[4].o1 = o1;
-	      opc->v[5].fi = o1->v[0].fi;
-	      return_true(sc, car_x);
-	    }
-
-	  if ((!is_pair(arg1)) ||
-	      (is_proper_quote(sc, arg1)))
-	    {
-	      opc->v[2].p = (!is_pair(arg1)) ? arg1 : cadr(arg1);
-	      opc->v[0].fp = opt_p_pp_sc;
-	      if ((is_pair(arg1)) && (is_symbol(opc->v[2].p)) && (is_let(obj)) && (opc->v[3].p_pp_f == let_ref))
-		use_slot_ref(sc, opc, obj, cadr(arg1));
-	      return_true(sc, car_x);
-	    }
-
-	  if (cell_optimize(sc, cdr(car_x)))
-	    { /* need both type check and func check! (hash-table-ref or 123) */
-	      opc->v[0].fp = ((is_hash_table(obj)) && (opc->v[3].p_pp_f == s7_hash_table_ref)) ? opt_p_pp_sf_href :
-		              (((is_let(obj)) && (opc->v[3].p_pp_f == let_ref)) ? opt_p_pp_sf_lref :  opt_p_pp_sf);
-	      opc->v[4].o1 = sc->opts[start];
-	      opc->v[5].fp = sc->opts[start]->v[0].fp;
-	      return_true(sc, car_x);
-	    }}} /* len==2 */
+        {
+          if ((!is_hash_table(obj)) &&
+              (!is_let(obj)))
+            {
+              opt_info *o1;
+              if (is_t_integer(arg1))
+                {
+                  opc->v[2].i = integer(arg1);
+                  opc->v[0].fp = opt_p_pi_sc;
+                  return_true(sc, car_x);
+                }
+              o1 = sc->opts[sc->pc];
+              if (!int_optimize(sc, cdr(car_x)))
+                return_false(sc, car_x);
+              opc->v[0].fp = opt_p_pi_sf;
+              opc->v[4].o1 = o1;
+              opc->v[5].fi = o1->v[0].fi;
+              return_true(sc, car_x);
+            }
+
+          if ((!is_pair(arg1)) ||
+              (is_proper_quote(sc, arg1)))
+            {
+              opc->v[2].p = (!is_pair(arg1)) ? arg1 : cadr(arg1);
+              opc->v[0].fp = opt_p_pp_sc;
+              if ((is_pair(arg1)) && (is_symbol(opc->v[2].p)) && (is_let(obj)) && (opc->v[3].p_pp_f == let_ref))
+                use_slot_ref(sc, opc, obj, cadr(arg1));
+              return_true(sc, car_x);
+            }
+
+          if (cell_optimize(sc, cdr(car_x)))
+            { /* need both type check and func check! (hash-table-ref or 123) */
+              opc->v[0].fp = ((is_hash_table(obj)) && (opc->v[3].p_pp_f == s7_hash_table_ref)) ? opt_p_pp_sf_href :
+                              (((is_let(obj)) && (opc->v[3].p_pp_f == let_ref)) ? opt_p_pp_sf_lref :  opt_p_pp_sf);
+              opc->v[4].o1 = sc->opts[start];
+              opc->v[5].fp = sc->opts[start]->v[0].fp;
+              return_true(sc, car_x);
+            }}} /* len==2 */
   else
     { /* len > 2 */
       if ((is_t_vector(obj)) && (len == 3) && (vector_rank(obj) == 2))
-	{
-	  s7_pointer slot = opt_integer_symbol(sc, caddr(car_x));
-	  if (slot)
-	    {
-	      opc->v[3].p = slot;
-	      slot = opt_integer_symbol(sc, arg1);
-	      if (slot)
-		{
-		  opc->v[2].p = slot;
-		  opc->v[4].p_pii_f = vector_ref_p_pii;
-		  opc->v[0].fp = opt_p_pii_sss;
-		  if ((loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
-		      (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
-		    opc->v[0].fp = vector_ref_pii_sss_unchecked;
-		  return_true(sc, car_x);
-		}}
-	  opc->v[10].o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdr(car_x)))
-	    {
-	      opc->v[8].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[0].fp = opt_p_pii_sff;
-		  opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		  opc->v[9].fi = opc->v[8].o1->v[0].fi;
-		  /* opc->v[1].p set above */
-		  opc->v[4].p_pii_f = vector_ref_p_pii_direct;
-		  return_true(sc, car_x);
-		}}
-	  sc->pc = start;
-	}
+        {
+          s7_pointer slot = opt_integer_symbol(sc, caddr(car_x));
+          if (slot)
+            {
+              opc->v[3].p = slot;
+              slot = opt_integer_symbol(sc, arg1);
+              if (slot)
+                {
+                  opc->v[2].p = slot;
+                  opc->v[4].p_pii_f = vector_ref_p_pii;
+                  opc->v[0].fp = opt_p_pii_sss;
+                  if ((loop_end_fits(opc->v[2].p, vector_dimension(obj, 0))) &&
+                      (loop_end_fits(opc->v[3].p, vector_dimension(obj, 1))))
+                    opc->v[0].fp = vector_ref_pii_sss_unchecked;
+                  return_true(sc, car_x);
+                }}
+          opc->v[10].o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, cdr(car_x)))
+            {
+              opc->v[8].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[0].fp = opt_p_pii_sff;
+                  opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                  opc->v[9].fi = opc->v[8].o1->v[0].fi;
+                  /* opc->v[1].p set above */
+                  opc->v[4].p_pii_f = vector_ref_p_pii_direct;
+                  return_true(sc, car_x);
+                }}
+          sc->pc = start;
+        }
 
       #define P_IMPLICIT_CALL_O1 4
       if (len < (NUM_VUNIONS - P_IMPLICIT_CALL_O1))  /* mimic p_call_any_ok */
-	{
-	  s7_pointer p = car_x;
-	  opc->v[1].i = len;
-	  for (int32_t pctr = (P_IMPLICIT_CALL_O1 - 1); is_pair(p); pctr++, p = cdr(p))
-	    {
-	      opc->v[pctr].o1 = sc->opts[sc->pc];
-	      if (!cell_optimize(sc, p))
-		break;
-	    }
-	  if (is_null(p))
-	    {
-	      /* here we know the vector rank/type, probably can handle the new value type, and maybe indices/dimensions,
-	       *   so at least forgo the vec type/rank + immutable checks, the *_set cases are from p_call_any_ok called in cell_optimize,
-	       *   but this is called very rarely mainly because hi-rank implicit refs are rare, and check_type_uncertainty is unhappy
-	       *   if there are multiple sets of a var.
-	       * hash-tables, lets, lists, and vectors with extra (implicit) args can't be handled because we have no way to tell
-	       *   what the implicit call will do, and in the opt_* context, everything must be "safe" (i.e. no defines or
-	       *   hidden multiple-values, etc).
-	       */
-	      if ((!is_any_vector(obj)) || (vector_rank(obj) != (len - 1))) return_false(sc, car_x); /* (* i (P2 1 1)) in timp.scm where P2 is a list */
-	      opc->v[0].fp = opt_p_call_any;
-	      switch (type(obj))     /* string can't happen here (no multidimensional strings), for pair/hash/let see above */
-		{
-		case T_INT_VECTOR:   opc->v[2].call = g_int_vector_ref;     break;
-		case T_BYTE_VECTOR:  opc->v[2].call = g_byte_vector_ref;    break;
-		case T_FLOAT_VECTOR: opc->v[2].call = g_float_vector_ref;   break;
-		case T_VECTOR:       opc->v[2].call = g_vector_ref;  	    break;
-		default:	     return_false(sc, car_x);
-		}
-	      return_true(sc, car_x);
-	    }}}
+        {
+          s7_pointer p = car_x;
+          opc->v[1].i = len;
+          for (int32_t pctr = (P_IMPLICIT_CALL_O1 - 1); is_pair(p); pctr++, p = cdr(p))
+            {
+              opc->v[pctr].o1 = sc->opts[sc->pc];
+              if (!cell_optimize(sc, p))
+                break;
+            }
+          if (is_null(p))
+            {
+              /* here we know the vector rank/type, probably can handle the new value type, and maybe indices/dimensions,
+               *   so at least forgo the vec type/rank + immutable checks, the *_set cases are from p_call_any_ok called in cell_optimize,
+               *   but this is called very rarely mainly because hi-rank implicit refs are rare, and check_type_uncertainty is unhappy
+               *   if there are multiple sets of a var.
+               * hash-tables, lets, lists, and vectors with extra (implicit) args can't be handled because we have no way to tell
+               *   what the implicit call will do, and in the opt_* context, everything must be "safe" (i.e. no defines or
+               *   hidden multiple-values, etc).
+               */
+              if ((!is_any_vector(obj)) || (vector_rank(obj) != (len - 1))) return_false(sc, car_x); /* (* i (P2 1 1)) in timp.scm where P2 is a list */
+              opc->v[0].fp = opt_p_call_any;
+              switch (type(obj))     /* string can't happen here (no multidimensional strings), for pair/hash/let see above */
+                {
+                case T_INT_VECTOR:   opc->v[2].call = g_int_vector_ref;     break;
+                case T_BYTE_VECTOR:  opc->v[2].call = g_byte_vector_ref;    break;
+                case T_FLOAT_VECTOR: opc->v[2].call = g_float_vector_ref;   break;
+                case T_VECTOR:       opc->v[2].call = g_vector_ref;              break;
+                default:             return_false(sc, car_x);
+                }
+              return_true(sc, car_x);
+            }}}
   return_false(sc, car_x);
 }
 
@@ -65351,25 +65351,25 @@ static bool set_p_i_f_combinable(s7_scheme *sc, opt_info *opc)
     {
       opt_info *o1 = sc->opts[sc->pc - 1];
       if ((o1->v[0].fi == opt_i_ii_ss) ||
-	  (o1->v[0].fi == opt_i_ii_ss_add))
-	{
-	  opc->v[4].i_ii_f = o1->v[3].i_ii_f;
-	  opc->v[2].p = o1->v[1].p;
-	  opc->v[3].p = o1->v[2].p;
-	  opc->v[0].fp = (o1->v[0].fi == opt_i_ii_ss_add) ? opt_set_p_i_fo_add : opt_set_p_i_fo;
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}
+          (o1->v[0].fi == opt_i_ii_ss_add))
+        {
+          opc->v[4].i_ii_f = o1->v[3].i_ii_f;
+          opc->v[2].p = o1->v[1].p;
+          opc->v[3].p = o1->v[2].p;
+          opc->v[0].fp = (o1->v[0].fi == opt_i_ii_ss_add) ? opt_set_p_i_fo_add : opt_set_p_i_fo;
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }
       if ((o1->v[0].fi == opt_i_ii_sc) || (o1->v[0].fi == opt_i_ii_sc_add) || (o1->v[0].fi == opt_i_ii_sc_sub))
-	{
-	  opc->v[4].i_ii_f = o1->v[3].i_ii_f;
-	  opc->v[2].p = o1->v[1].p;
-	  opc->v[3].i = o1->v[2].i;
-	  opc->v[0].fp = (o1->v[0].fi == opt_i_ii_sc_add) ? opt_set_p_i_fo1_add : opt_set_p_i_fo1;
-	  /* opt_if_nbp: opt_set_p_i_fo1_add b/shoot */
-	  backup_pc(sc);
-	  return_true(sc, NULL);
-	}}
+        {
+          opc->v[4].i_ii_f = o1->v[3].i_ii_f;
+          opc->v[2].p = o1->v[1].p;
+          opc->v[3].i = o1->v[2].i;
+          opc->v[0].fp = (o1->v[0].fi == opt_i_ii_sc_add) ? opt_set_p_i_fo1_add : opt_set_p_i_fo1;
+          /* opt_if_nbp: opt_set_p_i_fo1_add b/shoot */
+          backup_pc(sc);
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
@@ -65380,32 +65380,32 @@ static bool set_p_d_f_combinable(s7_scheme *sc, opt_info *opc)
     {
       opt_info *o1 = sc->opts[sc->pc - 3];
       if ((o1->v[0].fd == opt_d_mm_fff) &&
-	  ((o1->v[3].d_dd_f == add_d_dd) || (o1->v[3].d_dd_f == subtract_d_dd)))
-	{
-	  opt_info *o2 = sc->opts[sc->pc - 2];
-	  opc->v[0].fp = (o1->v[3].d_dd_f == add_d_dd) ? opt_set_p_d_f_mm_add : opt_set_p_d_f_mm_subtract;
-	  opc->v[3].p = o2->v[1].p;
-	  opc->v[4].p = o2->v[2].p;
-	  opc->v[5].p = o2->v[3].p;
-	  o1 = sc->opts[sc->pc - 1];
-	  opc->v[9].p = o1->v[1].p;
-	  opc->v[10].p = o1->v[2].p;
-	  opc->v[11].p = o1->v[3].p;
-	  sc->pc -= 3;
-	  return_true(sc, NULL);
-	}}
+          ((o1->v[3].d_dd_f == add_d_dd) || (o1->v[3].d_dd_f == subtract_d_dd)))
+        {
+          opt_info *o2 = sc->opts[sc->pc - 2];
+          opc->v[0].fp = (o1->v[3].d_dd_f == add_d_dd) ? opt_set_p_d_f_mm_add : opt_set_p_d_f_mm_subtract;
+          opc->v[3].p = o2->v[1].p;
+          opc->v[4].p = o2->v[2].p;
+          opc->v[5].p = o2->v[3].p;
+          o1 = sc->opts[sc->pc - 1];
+          opc->v[9].p = o1->v[1].p;
+          opc->v[10].p = o1->v[2].p;
+          opc->v[11].p = o1->v[3].p;
+          sc->pc -= 3;
+          return_true(sc, NULL);
+        }}
   return_false(sc, NULL);
 }
 
 static bool is_some_number(s7_scheme *sc, const s7_pointer tp)
 {
   return((tp == sc->is_integer_symbol) ||
-	 (tp == sc->is_float_symbol) ||
-	 (tp == sc->is_real_symbol) ||
-	 (tp == sc->is_complex_symbol) ||
-	 (tp == sc->is_number_symbol) ||
-	 (tp == sc->is_byte_symbol) ||
-	 (tp == sc->is_rational_symbol));
+         (tp == sc->is_float_symbol) ||
+         (tp == sc->is_real_symbol) ||
+         (tp == sc->is_complex_symbol) ||
+         (tp == sc->is_number_symbol) ||
+         (tp == sc->is_byte_symbol) ||
+         (tp == sc->is_rational_symbol));
 }
 
 static bool check_type_uncertainty(s7_scheme *sc, s7_pointer target, s7_pointer car_x, opt_info *opc, int32_t start_pc)
@@ -65421,35 +65421,35 @@ static bool check_type_uncertainty(s7_scheme *sc, s7_pointer target, s7_pointer
     {
       s7_int counts;
       if ((!has_low_count(code)) && /* only set below */
-	  (s7_tree_memq(sc, car_x, code)))
-	{
-	  if (is_pair(caar(code)))
-	    {
-	      counts = tree_count(sc, target, car(code), 0) +
-		       tree_count(sc, target, caadr(code), 0) +
-	               tree_count(sc, target, cddr(code), 0);
-	      for (s7_pointer p = car(code); is_pair(p); p = cdr(p))
-		{
-		  s7_pointer var = car(p);
-		  if ((is_proper_list_2(sc, var)) &&
-		      (car(var) == target))
-		    counts--;
-		}}
-	  else counts = tree_count(sc, target, code, 0);
-	}
+          (s7_tree_memq(sc, car_x, code)))
+        {
+          if (is_pair(caar(code)))
+            {
+              counts = tree_count(sc, target, car(code), 0) +
+                       tree_count(sc, target, caadr(code), 0) +
+                       tree_count(sc, target, cddr(code), 0);
+              for (s7_pointer p = car(code); is_pair(p); p = cdr(p))
+                {
+                  s7_pointer var = car(p);
+                  if ((is_proper_list_2(sc, var)) &&
+                      (car(var) == target))
+                    counts--;
+                }}
+          else counts = tree_count(sc, target, code, 0);
+        }
       else counts = 2;
       /* can be from lambda: (lambda (n)...): ((n) (set! sum (+ sum n))) etc */
       if (counts <= 2)
-	{
-	  set_has_low_count(code);
-	  sc->pc = start_pc;
-	  if (cell_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[0].fp = opt_set_p_p_f;
-	      opc->v[3].o1 = sc->opts[start_pc];
-	      opc->v[4].fp = sc->opts[start_pc]->v[0].fp;
-	      return_true(sc, car_x);
-	    }}}
+        {
+          set_has_low_count(code);
+          sc->pc = start_pc;
+          if (cell_optimize(sc, cddr(car_x)))
+            {
+              opc->v[0].fp = opt_set_p_p_f;
+              opc->v[3].o1 = sc->opts[start_pc];
+              opc->v[4].fp = sc->opts[start_pc]->v[0].fp;
+              return_true(sc, car_x);
+            }}}
   return_false(sc, car_x);
 }
 
@@ -65462,111 +65462,111 @@ static bool opt_cell_set(s7_scheme *sc, s7_pointer car_x) /* len == 3 here (p_sy
     {
       s7_pointer settee;
       if ((is_constant_symbol(sc, target)) ||
-	  ((is_slot(global_slot(target))) && (slot_has_setter(global_slot(target)))))
-	return_false(sc, car_x);
+          ((is_slot(global_slot(target))) && (slot_has_setter(global_slot(target)))))
+        return_false(sc, car_x);
 
       settee = s7_slot(sc, target);
       if ((is_slot(settee)) &&
-	  (!is_immutable_slot(settee)) &&
-	  (!is_syntax(slot_value(settee))))
-	{
- 	  int32_t start_pc = sc->pc;
-	  s7_pointer stype = s7_type_of(sc, slot_value(settee));
-	  s7_pointer atype;
-	  opc->v[1].p = settee;
-	  if (slot_has_setter(settee))
-	    {
-	      if ((is_c_function(slot_setter(settee))) &&
-		  (is_bool_function(slot_setter(settee))) &&
-		  (stype == opt_arg_type(sc, cddr(car_x))) &&
-		  (cell_optimize(sc, cddr(car_x))))
-		{
-		  opc->v[1].p = settee;
-		  opc->v[0].fp = opt_set_p_p_f_with_setter;
-		  opc->v[3].o1 = sc->opts[start_pc];
-		  opc->v[4].fp = sc->opts[start_pc]->v[0].fp;
-		  return_true(sc, car_x);
-		}
-	      return_false(sc, car_x);
-	    }
-
-	  if (stype == sc->is_integer_symbol)
-	    {
-	      if (is_symbol(value))
-		{
-		  s7_pointer val_slot = opt_integer_symbol(sc, value);
-		  if (val_slot)
-		    {
-		      opc->v[2].p = val_slot;
-		      opc->v[0].fp = opt_set_p_i_s;
-		      return_true(sc, car_x);
-		    }}
-	      else
-		{
-		  opc->v[5].o1 = sc->opts[sc->pc];
-		  if (!int_optimize(sc, cddr(car_x)))
-		    return(check_type_uncertainty(sc, target, car_x, opc, start_pc));
-		  if (!set_p_i_f_combinable(sc, opc))
-		    {
-		      opc->v[0].fp = opt_set_p_i_f;
-		      opc->v[6].fi = opc->v[5].o1->v[0].fi;
-		    }
-		  return_true(sc, car_x);
-		}
-	      return_false(sc, car_x);
-	    }
-	  if (stype == sc->is_float_symbol)
-	    {
-	      if (is_t_real(value))
-		{
-		  opc->v[2].p = value;
-		  opc->v[0].fp = opt_set_p_c;
-		  return_true(sc, car_x);
-		}
-	      if (is_symbol(caddr(car_x)))
-		{
-		  s7_pointer val_slot = opt_float_symbol(sc, value);
-		  if (val_slot)
-		    {
-		      opc->v[2].p = val_slot;
-		      opc->v[0].fp = opt_set_p_d_s;
-		      return_true(sc, car_x);
-		    }}
-	      else
-		{
-		  if ((is_pair(value)) &&
-		      (float_optimize(sc, cddr(car_x))))
-		    {
-		      if (!set_p_d_f_combinable(sc, opc))
-			{
-			  opc->v[4].o1 = sc->opts[start_pc];
-			  opc->v[5].fd = sc->opts[start_pc]->v[0].fd;
-			  opc->v[0].fp = (opc->v[5].fd == opt_d_dd_sf_add) ? opt_set_p_d_f_sf_add : opt_set_p_d_f;
-			}
-		      return_true(sc, car_x);
-		    }
-		  return(check_type_uncertainty(sc, target, car_x, opc, start_pc));
-		}
-	      return_false(sc, car_x);
-	    }
-
-	  atype = opt_arg_type(sc, cddr(car_x));
-	  if ((is_some_number(sc, atype)) && (!is_some_number(sc, stype)))
-	    return_false(sc, car_x);
-	  if ((stype != atype) &&
-	      (is_symbol(stype)) &&
-	      (((t_sequence_p[symbol_type(stype)]) &&
-		(stype != sc->is_null_symbol) && (stype != sc->is_pair_symbol) &&
-		(stype != sc->is_list_symbol) && (stype != sc->is_proper_list_symbol)) ||
-	       (stype == sc->is_iterator_symbol)))
-	    return_false(sc, car_x);
-	  if (cell_optimize(sc, cddr(car_x)))
-	    {
-	      opc->v[0].fp = opt_set_p_p_f;
-	      opc->v[3].o1 = sc->opts[start_pc];
-	      opc->v[4].fp = sc->opts[start_pc]->v[0].fp;
-	      return_true(sc, car_x);
-	    }}
+          (!is_immutable_slot(settee)) &&
+          (!is_syntax(slot_value(settee))))
+        {
+           int32_t start_pc = sc->pc;
+          s7_pointer stype = s7_type_of(sc, slot_value(settee));
+          s7_pointer atype;
+          opc->v[1].p = settee;
+          if (slot_has_setter(settee))
+            {
+              if ((is_c_function(slot_setter(settee))) &&
+                  (is_bool_function(slot_setter(settee))) &&
+                  (stype == opt_arg_type(sc, cddr(car_x))) &&
+                  (cell_optimize(sc, cddr(car_x))))
+                {
+                  opc->v[1].p = settee;
+                  opc->v[0].fp = opt_set_p_p_f_with_setter;
+                  opc->v[3].o1 = sc->opts[start_pc];
+                  opc->v[4].fp = sc->opts[start_pc]->v[0].fp;
+                  return_true(sc, car_x);
+                }
+              return_false(sc, car_x);
+            }
+
+          if (stype == sc->is_integer_symbol)
+            {
+              if (is_symbol(value))
+                {
+                  s7_pointer val_slot = opt_integer_symbol(sc, value);
+                  if (val_slot)
+                    {
+                      opc->v[2].p = val_slot;
+                      opc->v[0].fp = opt_set_p_i_s;
+                      return_true(sc, car_x);
+                    }}
+              else
+                {
+                  opc->v[5].o1 = sc->opts[sc->pc];
+                  if (!int_optimize(sc, cddr(car_x)))
+                    return(check_type_uncertainty(sc, target, car_x, opc, start_pc));
+                  if (!set_p_i_f_combinable(sc, opc))
+                    {
+                      opc->v[0].fp = opt_set_p_i_f;
+                      opc->v[6].fi = opc->v[5].o1->v[0].fi;
+                    }
+                  return_true(sc, car_x);
+                }
+              return_false(sc, car_x);
+            }
+          if (stype == sc->is_float_symbol)
+            {
+              if (is_t_real(value))
+                {
+                  opc->v[2].p = value;
+                  opc->v[0].fp = opt_set_p_c;
+                  return_true(sc, car_x);
+                }
+              if (is_symbol(caddr(car_x)))
+                {
+                  s7_pointer val_slot = opt_float_symbol(sc, value);
+                  if (val_slot)
+                    {
+                      opc->v[2].p = val_slot;
+                      opc->v[0].fp = opt_set_p_d_s;
+                      return_true(sc, car_x);
+                    }}
+              else
+                {
+                  if ((is_pair(value)) &&
+                      (float_optimize(sc, cddr(car_x))))
+                    {
+                      if (!set_p_d_f_combinable(sc, opc))
+                        {
+                          opc->v[4].o1 = sc->opts[start_pc];
+                          opc->v[5].fd = sc->opts[start_pc]->v[0].fd;
+                          opc->v[0].fp = (opc->v[5].fd == opt_d_dd_sf_add) ? opt_set_p_d_f_sf_add : opt_set_p_d_f;
+                        }
+                      return_true(sc, car_x);
+                    }
+                  return(check_type_uncertainty(sc, target, car_x, opc, start_pc));
+                }
+              return_false(sc, car_x);
+            }
+
+          atype = opt_arg_type(sc, cddr(car_x));
+          if ((is_some_number(sc, atype)) && (!is_some_number(sc, stype)))
+            return_false(sc, car_x);
+          if ((stype != atype) &&
+              (is_symbol(stype)) &&
+              (((t_sequence_p[symbol_type(stype)]) &&
+                (stype != sc->is_null_symbol) && (stype != sc->is_pair_symbol) &&
+                (stype != sc->is_list_symbol) && (stype != sc->is_proper_list_symbol)) ||
+               (stype == sc->is_iterator_symbol)))
+            return_false(sc, car_x);
+          if (cell_optimize(sc, cddr(car_x)))
+            {
+              opc->v[0].fp = opt_set_p_p_f;
+              opc->v[3].o1 = sc->opts[start_pc];
+              opc->v[4].fp = sc->opts[start_pc]->v[0].fp;
+              return_true(sc, car_x);
+            }}
       return_false(sc, car_x);
     }
   if ((is_pair(target)) &&
@@ -65576,304 +65576,304 @@ static bool opt_cell_set(s7_scheme *sc, s7_pointer car_x) /* len == 3 here (p_sy
     {
       s7_pointer obj, index, index_type, s_slot = s7_slot(sc, car(target));
       if (!is_slot(s_slot))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
 
       obj = slot_value(s_slot);
       opc->v[1].p = s_slot;
       if (!is_mutable_sequence(obj))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
 
       index = cadr(target);
       index_type = opt_arg_type(sc, cdr(target));
       switch (type(obj))
-	{
-	case T_STRING:
-	  {
-	    s7_pointer val_type;
-	    if ((index_type != sc->is_integer_symbol) || (is_pair(cddr(target)))) return_false(sc, car_x);
-	    val_type = opt_arg_type(sc, cddr(car_x));
-	    if (val_type != sc->is_char_symbol)
-	      return_false(sc, car_x);
-	    opc->v[3].p_pip_f = string_set_p_pip_unchecked;
-	  }
-	  break;
-
-	case T_VECTOR:
-	  if (index_type != sc->is_integer_symbol) return_false(sc, car_x);
-	  if (is_null(cddr(target)))
-	    {
-	      if (vector_rank(obj) != 1) return_false(sc, car_x);
-	      opc->v[3].p_pip_f = (is_typed_vector(obj)) ? typed_vector_set_p_pip_unchecked : vector_set_p_pip_unchecked;
-	    }
-	  else
-	    {
-	      if (vector_rank(obj) != 2)
-		return_false(sc, car_x);
-	      opc->v[5].p_piip_f = (is_typed_vector(obj)) ? typed_vector_set_p_piip_direct : vector_set_p_piip_direct;
-	      return(p_piip_to_sx(sc, opc, cdr(target), cddr(target), cddr(car_x), obj));
-	    }
-	  break;
-
-	case T_FLOAT_VECTOR:
-	  if (opt_float_vector_set(sc, opc, car(target), cdr(target),
-				   (is_null(cddr(target))) ? NULL : cddr(target),
-				   ((!is_pair(cddr(target))) || (is_null(cdddr(target)))) ? NULL : cdddr(target),
-				   cddr(car_x)))
-	    {
-	      opc->v[O_WRAP].fd = opc->v[0].fd;
-	      opc->v[0].fp = d_to_p;
-	      return_true(sc, car_x);
-	    }
-	  return_false(sc, car_x);
-
-	case T_BYTE_VECTOR:
-	case T_INT_VECTOR:
-	  if (opt_int_vector_set(sc, -1, opc, car(target), cdr(target), (is_null(cddr(target))) ? NULL : cddr(target), cddr(car_x)))
-	    {
-	      opc->v[O_WRAP].fi = opc->v[0].fi;
-	      opc->v[0].fp = i_to_p;
-	      return_true(sc, car_x);
-	    }
-	  return_false(sc, car_x);
-
-	case T_C_OBJECT:
-	  if ((is_null(cddr(target))) &&
-	      (is_c_function(c_object_setf(sc, obj))))
-	    {
-	      /* d_7pid_ok assumes cadr is the target, not car etc */
-	      s7_d_7pid_t func = s7_d_7pid_function(c_object_setf(sc, obj));
-	      if (func)
-		{
-		  s7_pointer slot = opt_integer_symbol(sc, cadr(target));
-		  opc->v[4].d_7pid_f = func;
-		  opc->v[10].o1 = sc->opts[sc->pc];
-		  if (slot)
-		    {
-		      if (float_optimize(sc, cddr(car_x)))
-			{
-			  opc->v[O_WRAP].fd = opt_d_7pid_ssf;
-			  opc->v[0].fp = d_to_p; /* cell_optimize, so need to return s7_pointer */
-			  opc->v[2].p = slot;
-			  opc->v[11].fd = opc->v[10].o1->v[0].fd;
-			  return_true(sc, car_x);
-			}}
-		  else
-		    if (int_optimize(sc, cdr(target)))
-		      {
-			opc->v[8].o1 = sc->opts[sc->pc];
-			if (float_optimize(sc, cddr(car_x)))
-			  {
-			    opc->v[O_WRAP].fd = opt_d_7pid_sff;
-			    opc->v[11].fi = opc->v[10].o1->v[0].fi;
-			    opc->v[9].fd = opc->v[8].o1->v[0].fd;
-			    opc->v[0].fp = d_to_p;
-			    return_true(sc, car_x);
-			  }}}}
-	  return_false(sc, car_x);
-
-	case T_PAIR:
-	  if (index_type != sc->is_integer_symbol) return_false(sc, car_x); /* (let ((tf13 '(()))) (define (f) (do ((i 0 (+ i 1))) ((= i 1)) (set! (tf13 letrec*) 0))) (f)) */
-	  if (is_pair(cddr(target))) return_false(sc, car_x);
-	  opc->v[3].p_pip_f = list_set_p_pip_unchecked;
-
-	  { /* an experiment -- is this ever hit in normal code? (for tref.scm) */
-	    if ((is_pair(value)) && (car(value) == sc->add_symbol) && (is_t_integer(caddr(value))) && (is_null(cdddr(value))) && (is_symbol(cadr(target))) &&
-		(car(target) == (caadr(value))) && (is_pair(cdadr(value))) && (is_null(cddadr(value))) && (cadr(target) == cadadr(value)))
-	      {
-		s7_pointer slot = opt_simple_symbol(sc, index);
-		if ((slot) && (is_t_integer(slot_value(slot))))
-		  {
-		    opc->v[2].p = slot;
-		    opc->v[3].p = caddr(value);
-		    opc->v[0].fp = list_increment_p_pip_unchecked;
-		    return_true(sc, car_x);
-		  }}}
-	  break;
-
-	case T_HASH_TABLE:
-	  if (is_pair(cddr(target))) return_false(sc, car_x);
-	  opc->v[3].p_ppp_f = s7_hash_table_set;
-	  break;
-
-	case T_LET:
-	  /* here we know the let is a covered mutable let -- ?? not true if s7-optimize called explicitly */
-	  if ((is_pair(cddr(target))) || (is_openlet(obj)))
-	    return_false(sc, car_x);
-	  if ((is_symbol_and_keyword(cadr(target))) ||
-	      ((is_quoted_symbol(cadr(target)))))
-	    opc->v[3].p_ppp_f = let_set_1;
-	  else opc->v[3].p_ppp_f = let_set_p_ppp_2;  /* (set! (L3 'x) (+ (L3 'x) 1)) */
-	  break;
-
-	default:
-	  return_false(sc, car_x);
-	}
+        {
+        case T_STRING:
+          {
+            s7_pointer val_type;
+            if ((index_type != sc->is_integer_symbol) || (is_pair(cddr(target)))) return_false(sc, car_x);
+            val_type = opt_arg_type(sc, cddr(car_x));
+            if (val_type != sc->is_char_symbol)
+              return_false(sc, car_x);
+            opc->v[3].p_pip_f = string_set_p_pip_unchecked;
+          }
+          break;
+
+        case T_VECTOR:
+          if (index_type != sc->is_integer_symbol) return_false(sc, car_x);
+          if (is_null(cddr(target)))
+            {
+              if (vector_rank(obj) != 1) return_false(sc, car_x);
+              opc->v[3].p_pip_f = (is_typed_vector(obj)) ? typed_vector_set_p_pip_unchecked : vector_set_p_pip_unchecked;
+            }
+          else
+            {
+              if (vector_rank(obj) != 2)
+                return_false(sc, car_x);
+              opc->v[5].p_piip_f = (is_typed_vector(obj)) ? typed_vector_set_p_piip_direct : vector_set_p_piip_direct;
+              return(p_piip_to_sx(sc, opc, cdr(target), cddr(target), cddr(car_x), obj));
+            }
+          break;
+
+        case T_FLOAT_VECTOR:
+          if (opt_float_vector_set(sc, opc, car(target), cdr(target),
+                                   (is_null(cddr(target))) ? NULL : cddr(target),
+                                   ((!is_pair(cddr(target))) || (is_null(cdddr(target)))) ? NULL : cdddr(target),
+                                   cddr(car_x)))
+            {
+              opc->v[O_WRAP].fd = opc->v[0].fd;
+              opc->v[0].fp = d_to_p;
+              return_true(sc, car_x);
+            }
+          return_false(sc, car_x);
+
+        case T_BYTE_VECTOR:
+        case T_INT_VECTOR:
+          if (opt_int_vector_set(sc, -1, opc, car(target), cdr(target), (is_null(cddr(target))) ? NULL : cddr(target), cddr(car_x)))
+            {
+              opc->v[O_WRAP].fi = opc->v[0].fi;
+              opc->v[0].fp = i_to_p;
+              return_true(sc, car_x);
+            }
+          return_false(sc, car_x);
+
+        case T_C_OBJECT:
+          if ((is_null(cddr(target))) &&
+              (is_c_function(c_object_setf(sc, obj))))
+            {
+              /* d_7pid_ok assumes cadr is the target, not car etc */
+              s7_d_7pid_t func = s7_d_7pid_function(c_object_setf(sc, obj));
+              if (func)
+                {
+                  s7_pointer slot = opt_integer_symbol(sc, cadr(target));
+                  opc->v[4].d_7pid_f = func;
+                  opc->v[10].o1 = sc->opts[sc->pc];
+                  if (slot)
+                    {
+                      if (float_optimize(sc, cddr(car_x)))
+                        {
+                          opc->v[O_WRAP].fd = opt_d_7pid_ssf;
+                          opc->v[0].fp = d_to_p; /* cell_optimize, so need to return s7_pointer */
+                          opc->v[2].p = slot;
+                          opc->v[11].fd = opc->v[10].o1->v[0].fd;
+                          return_true(sc, car_x);
+                        }}
+                  else
+                    if (int_optimize(sc, cdr(target)))
+                      {
+                        opc->v[8].o1 = sc->opts[sc->pc];
+                        if (float_optimize(sc, cddr(car_x)))
+                          {
+                            opc->v[O_WRAP].fd = opt_d_7pid_sff;
+                            opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                            opc->v[9].fd = opc->v[8].o1->v[0].fd;
+                            opc->v[0].fp = d_to_p;
+                            return_true(sc, car_x);
+                          }}}}
+          return_false(sc, car_x);
+
+        case T_PAIR:
+          if (index_type != sc->is_integer_symbol) return_false(sc, car_x); /* (let ((tf13 '(()))) (define (f) (do ((i 0 (+ i 1))) ((= i 1)) (set! (tf13 letrec*) 0))) (f)) */
+          if (is_pair(cddr(target))) return_false(sc, car_x);
+          opc->v[3].p_pip_f = list_set_p_pip_unchecked;
+
+          { /* an experiment -- is this ever hit in normal code? (for tref.scm) */
+            if ((is_pair(value)) && (car(value) == sc->add_symbol) && (is_t_integer(caddr(value))) && (is_null(cdddr(value))) && (is_symbol(cadr(target))) &&
+                (car(target) == (caadr(value))) && (is_pair(cdadr(value))) && (is_null(cddadr(value))) && (cadr(target) == cadadr(value)))
+              {
+                s7_pointer slot = opt_simple_symbol(sc, index);
+                if ((slot) && (is_t_integer(slot_value(slot))))
+                  {
+                    opc->v[2].p = slot;
+                    opc->v[3].p = caddr(value);
+                    opc->v[0].fp = list_increment_p_pip_unchecked;
+                    return_true(sc, car_x);
+                  }}}
+          break;
+
+        case T_HASH_TABLE:
+          if (is_pair(cddr(target))) return_false(sc, car_x);
+          opc->v[3].p_ppp_f = s7_hash_table_set;
+          break;
+
+        case T_LET:
+          /* here we know the let is a covered mutable let -- ?? not true if s7-optimize called explicitly */
+          if ((is_pair(cddr(target))) || (is_openlet(obj)))
+            return_false(sc, car_x);
+          if ((is_symbol_and_keyword(cadr(target))) ||
+              ((is_quoted_symbol(cadr(target)))))
+            opc->v[3].p_ppp_f = let_set_1;
+          else opc->v[3].p_ppp_f = let_set_p_ppp_2;  /* (set! (L3 'x) (+ (L3 'x) 1)) */
+          break;
+
+        default:
+          return_false(sc, car_x);
+        }
       if (is_symbol(index))
-	{
-	  int32_t start = sc->pc;
-	  s7_pointer slot = opt_simple_symbol(sc, index);
-	  if (slot)
-	    {
-	      opc->v[2].p = slot;
-	      if ((is_t_integer(slot_value(slot))) &&
-		  (has_loop_end(opc->v[2].p)))
-		{
-		  if (is_string(obj))
-		    {
-		      if (loop_end(opc->v[2].p) <= string_length(obj))
-			opc->v[3].p_pip_f = string_set_p_pip_direct;
-		    }
-		  else
-		    if (is_byte_vector(obj))
-		      {
-			if (loop_end(opc->v[2].p) <= byte_vector_length(obj))
-			  opc->v[3].p_pip_f = byte_vector_set_p_pip_direct;
-		      }
-		    else
-		      if (is_any_vector(obj)) /* true for all 3 vectors */
-			{
-			  if ((is_any_vector(obj)) &&
-			      (loop_end(opc->v[2].p) <= vector_length(obj)))
-			    {
-			      if (is_typed_t_vector(obj))
-				opc->v[3].p_pip_f = typed_t_vector_set_p_pip_direct;
-			      else opc->v[3].p_pip_f = t_vector_set_p_pip_direct;
-			    }}}
-	      if (is_symbol(value))
-		{
-		  s7_pointer val_slot = opt_simple_symbol(sc, value);
-		  if (val_slot)
-		    {
-		      s7_p_ppp_t func1;
-		      if ((is_string(obj)) ||
-			  (is_any_vector(obj)) ||
-			  (is_pair(obj)))
-			{
-			  opc->v[4].p_pip_f = opc->v[3].p_pip_f;
-			  opc->v[3].p = val_slot;
-			  opc->v[0].fp = opt_p_pip_sss;
-			  return_true(sc, car_x);
-			}
-		      if ((is_let(obj)) && (is_keyword(index)) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 :x) i) */
-			  (use_pps_slot_set(sc, opc, obj, keyword_symbol(index), val_slot)))
-			return_true(sc, car_x);
-		      func1 = opc->v[3].p_ppp_f;
-		      opc->v[4].p_ppp_f = func1;
-		      opc->v[3].p = val_slot;
-		      opc->v[0].fp = (func1 == multiply_p_ppp) ? opt_p_ppp_sss_mul :
-			               (((is_hash_table(obj)) && (func1 == s7_hash_table_set)) ? opt_p_ppp_sss_hset : opt_p_ppp_sss);
-		      return_true(sc, car_x);
-		    }}
-	      else
-		if ((!is_pair(value)) ||
-		    (is_proper_quote(sc, value)))
-		  {
-		    if (!is_pair(value))
-		      opc->v[4].p = value;
-		    else opc->v[4].p = cadr(value);
-		    if ((is_string(obj)) ||
-			(is_any_vector(obj)) ||
-			(is_pair(obj)))
-		      {
-			opc->v[0].fp = opt_p_pip_ssc;
-			return_true(sc, car_x);
-		      }
-		    if ((is_let(obj)) && (is_keyword(index)) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 :x) 0) */
-			(use_ppc_slot_set(sc, opc, obj, keyword_symbol(index), opc->v[4].p)))
-		      return_true(sc, car_x);
-		    opc->v[0].fp = opt_p_ppp_ssc;
-		    return_true(sc, car_x);
-		  }
-	      if (cell_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[4].o1 = sc->opts[start];
-		  opc->v[5].fp = sc->opts[start]->v[0].fp;
-		  if ((is_string(obj)) ||
-		      (is_any_vector(obj)) ||
-		      (is_pair(obj)))
-		    {
-		      if (p_pip_ssf_combinable(sc, opc, start))
-			return_true(sc, car_x);
-		      opc->v[0].fp = opt_p_pip_ssf;
-		      return_true(sc, car_x);
-		    }
-		  if ((is_let(obj)) && (is_keyword(index)) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 :x) (+ (L3 'x) 1)) */
-		      (use_ppf_slot_set(sc, opc, obj, keyword_symbol(index))))
-		    return_true(sc, car_x);
-
-		  opc->v[0].fp = opt_p_ppp_ssf;
-		  return_true(sc, car_x);
-		}}}
+        {
+          int32_t start = sc->pc;
+          s7_pointer slot = opt_simple_symbol(sc, index);
+          if (slot)
+            {
+              opc->v[2].p = slot;
+              if ((is_t_integer(slot_value(slot))) &&
+                  (has_loop_end(opc->v[2].p)))
+                {
+                  if (is_string(obj))
+                    {
+                      if (loop_end(opc->v[2].p) <= string_length(obj))
+                        opc->v[3].p_pip_f = string_set_p_pip_direct;
+                    }
+                  else
+                    if (is_byte_vector(obj))
+                      {
+                        if (loop_end(opc->v[2].p) <= byte_vector_length(obj))
+                          opc->v[3].p_pip_f = byte_vector_set_p_pip_direct;
+                      }
+                    else
+                      if (is_any_vector(obj)) /* true for all 3 vectors */
+                        {
+                          if ((is_any_vector(obj)) &&
+                              (loop_end(opc->v[2].p) <= vector_length(obj)))
+                            {
+                              if (is_typed_t_vector(obj))
+                                opc->v[3].p_pip_f = typed_t_vector_set_p_pip_direct;
+                              else opc->v[3].p_pip_f = t_vector_set_p_pip_direct;
+                            }}}
+              if (is_symbol(value))
+                {
+                  s7_pointer val_slot = opt_simple_symbol(sc, value);
+                  if (val_slot)
+                    {
+                      s7_p_ppp_t func1;
+                      if ((is_string(obj)) ||
+                          (is_any_vector(obj)) ||
+                          (is_pair(obj)))
+                        {
+                          opc->v[4].p_pip_f = opc->v[3].p_pip_f;
+                          opc->v[3].p = val_slot;
+                          opc->v[0].fp = opt_p_pip_sss;
+                          return_true(sc, car_x);
+                        }
+                      if ((is_let(obj)) && (is_keyword(index)) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 :x) i) */
+                          (use_pps_slot_set(sc, opc, obj, keyword_symbol(index), val_slot)))
+                        return_true(sc, car_x);
+                      func1 = opc->v[3].p_ppp_f;
+                      opc->v[4].p_ppp_f = func1;
+                      opc->v[3].p = val_slot;
+                      opc->v[0].fp = (func1 == multiply_p_ppp) ? opt_p_ppp_sss_mul :
+                                       (((is_hash_table(obj)) && (func1 == s7_hash_table_set)) ? opt_p_ppp_sss_hset : opt_p_ppp_sss);
+                      return_true(sc, car_x);
+                    }}
+              else
+                if ((!is_pair(value)) ||
+                    (is_proper_quote(sc, value)))
+                  {
+                    if (!is_pair(value))
+                      opc->v[4].p = value;
+                    else opc->v[4].p = cadr(value);
+                    if ((is_string(obj)) ||
+                        (is_any_vector(obj)) ||
+                        (is_pair(obj)))
+                      {
+                        opc->v[0].fp = opt_p_pip_ssc;
+                        return_true(sc, car_x);
+                      }
+                    if ((is_let(obj)) && (is_keyword(index)) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 :x) 0) */
+                        (use_ppc_slot_set(sc, opc, obj, keyword_symbol(index), opc->v[4].p)))
+                      return_true(sc, car_x);
+                    opc->v[0].fp = opt_p_ppp_ssc;
+                    return_true(sc, car_x);
+                  }
+              if (cell_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[4].o1 = sc->opts[start];
+                  opc->v[5].fp = sc->opts[start]->v[0].fp;
+                  if ((is_string(obj)) ||
+                      (is_any_vector(obj)) ||
+                      (is_pair(obj)))
+                    {
+                      if (p_pip_ssf_combinable(sc, opc, start))
+                        return_true(sc, car_x);
+                      opc->v[0].fp = opt_p_pip_ssf;
+                      return_true(sc, car_x);
+                    }
+                  if ((is_let(obj)) && (is_keyword(index)) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 :x) (+ (L3 'x) 1)) */
+                      (use_ppf_slot_set(sc, opc, obj, keyword_symbol(index))))
+                    return_true(sc, car_x);
+
+                  opc->v[0].fp = opt_p_ppp_ssf;
+                  return_true(sc, car_x);
+                }}}
       else /* index not a symbol */
-	{
-	  opt_info *o1;
-	  if ((is_string(obj)) ||
-	      (is_pair(obj)) ||
-	      (is_any_vector(obj)))
-	    {
-	      opc->v[10].o1 = sc->opts[sc->pc];
-	      if (int_optimize(sc, cdr(target)))
-		{
-		  opc->v[8].o1 = sc->opts[sc->pc];
-		  if (cell_optimize(sc, cddr(car_x)))
-		    {
-		      opc->v[0].fp = opt_p_pip_sff;
-		      opc->v[11].fi = opc->v[10].o1->v[0].fi;
-		      opc->v[9].fp = opc->v[8].o1->v[0].fp;
-		      return_true(sc, car_x);
-		    }}
-	      return_false(sc, car_x);
-	    }
-	  if (is_quoted_symbol(cadr(target)))
-	    {
-	      if (is_symbol(value))
-		{
-		  s7_pointer val_slot = opt_simple_symbol(sc, value);
-		  if (val_slot)
-		    {
-		      opc->v[2].p = cadadr(target);
-		      opc->v[4].p = val_slot;
-		      opc->v[0].fp = opt_p_ppp_scs;
-		      if ((is_let(obj)) && (opc->v[3].p_ppp_f == let_set_1))
-			use_pps_slot_set(sc, opc, obj, cadadr(target), val_slot);
-		      return_true(sc, car_x);
-		    }}
-	      if ((!is_pair(value)) && (is_let(obj)) && (opc->v[3].p_ppp_f == let_set_1) &&
-		  (use_ppc_slot_set(sc, opc, obj, cadadr(target), value)))
-		return_true(sc, car_x);
-	    }
-	  o1 = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cdr(target)))
-	    {
-	      opt_info *o2;
-	      if (is_symbol(value))
-		{
-		  s7_pointer val_slot = opt_simple_symbol(sc, value);
-		  if (val_slot)
-		    {
-		      opc->v[2].p = val_slot;
-		      opc->v[0].fp = opt_p_ppp_sfs;
-		      opc->v[4].o1 = o1;
-		      opc->v[5].fp = o1->v[0].fp;
-		      return_true(sc, car_x);
-		    }}
-	      o2 = sc->opts[sc->pc];
-	      if (cell_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[0].fp = opt_p_ppp_sff;
-		  if ((is_let(obj)) && (is_quoted_symbol(cadr(target))) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 'x) (+ (L3 'x) 1)) */
-		      (use_ppf_slot_set(sc, opc, obj, cadadr(target))))
-		    {
-		      opc->v[4].o1 = o2;
-		      opc->v[5].fp = opc->v[4].o1->v[0].fp;
-		      return_true(sc, car_x);
-		    }
-		  opc->v[10].o1 = o1;
-		  opc->v[11].fp = o1->v[0].fp;
-		  opc->v[8].o1 = o2;
-		  opc->v[9].fp = o2->v[0].fp;
-		  return_true(sc, car_x);
-		}}}}
+        {
+          opt_info *o1;
+          if ((is_string(obj)) ||
+              (is_pair(obj)) ||
+              (is_any_vector(obj)))
+            {
+              opc->v[10].o1 = sc->opts[sc->pc];
+              if (int_optimize(sc, cdr(target)))
+                {
+                  opc->v[8].o1 = sc->opts[sc->pc];
+                  if (cell_optimize(sc, cddr(car_x)))
+                    {
+                      opc->v[0].fp = opt_p_pip_sff;
+                      opc->v[11].fi = opc->v[10].o1->v[0].fi;
+                      opc->v[9].fp = opc->v[8].o1->v[0].fp;
+                      return_true(sc, car_x);
+                    }}
+              return_false(sc, car_x);
+            }
+          if (is_quoted_symbol(cadr(target)))
+            {
+              if (is_symbol(value))
+                {
+                  s7_pointer val_slot = opt_simple_symbol(sc, value);
+                  if (val_slot)
+                    {
+                      opc->v[2].p = cadadr(target);
+                      opc->v[4].p = val_slot;
+                      opc->v[0].fp = opt_p_ppp_scs;
+                      if ((is_let(obj)) && (opc->v[3].p_ppp_f == let_set_1))
+                        use_pps_slot_set(sc, opc, obj, cadadr(target), val_slot);
+                      return_true(sc, car_x);
+                    }}
+              if ((!is_pair(value)) && (is_let(obj)) && (opc->v[3].p_ppp_f == let_set_1) &&
+                  (use_ppc_slot_set(sc, opc, obj, cadadr(target), value)))
+                return_true(sc, car_x);
+            }
+          o1 = sc->opts[sc->pc];
+          if (cell_optimize(sc, cdr(target)))
+            {
+              opt_info *o2;
+              if (is_symbol(value))
+                {
+                  s7_pointer val_slot = opt_simple_symbol(sc, value);
+                  if (val_slot)
+                    {
+                      opc->v[2].p = val_slot;
+                      opc->v[0].fp = opt_p_ppp_sfs;
+                      opc->v[4].o1 = o1;
+                      opc->v[5].fp = o1->v[0].fp;
+                      return_true(sc, car_x);
+                    }}
+              o2 = sc->opts[sc->pc];
+              if (cell_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[0].fp = opt_p_ppp_sff;
+                  if ((is_let(obj)) && (is_quoted_symbol(cadr(target))) && (opc->v[3].p_ppp_f == let_set_1) && /* (set! (L3 'x) (+ (L3 'x) 1)) */
+                      (use_ppf_slot_set(sc, opc, obj, cadadr(target))))
+                    {
+                      opc->v[4].o1 = o2;
+                      opc->v[5].fp = opc->v[4].o1->v[0].fp;
+                      return_true(sc, car_x);
+                    }
+                  opc->v[10].o1 = o1;
+                  opc->v[11].fp = o1->v[0].fp;
+                  opc->v[8].o1 = o2;
+                  opc->v[9].fp = o2->v[0].fp;
+                  return_true(sc, car_x);
+                }}}}
   return_false(sc, car_x);
 }
 
@@ -65904,17 +65904,17 @@ static void oo_idp_nr_fixup(opt_info *start)
     {
       start->v[0].fp = d_to_p_nr;
       if (start->v[O_WRAP].fd == opt_d_7pid_ssf)
-	start->v[0].fp = opt_d_7pid_ssf_nr;
+        start->v[0].fp = opt_d_7pid_ssf_nr;
       else
-	if (start->v[O_WRAP].fd == opt_d_7pid_ssfo_fv)
-	  {
-	    start->v[0].fp = opt_d_7pid_ssfo_fv_nr;
-	    if (start->v[6].d_dd_f == add_d_dd)
-	      start->v[0].fp = opt_d_7pid_ssfo_fv_add_nr;
-	    else
-	      if (start->v[6].d_dd_f == subtract_d_dd)
-		start->v[0].fp = opt_d_7pid_ssfo_fv_sub_nr;
-	  }}
+        if (start->v[O_WRAP].fd == opt_d_7pid_ssfo_fv)
+          {
+            start->v[0].fp = opt_d_7pid_ssfo_fv_nr;
+            if (start->v[6].d_dd_f == add_d_dd)
+              start->v[0].fp = opt_d_7pid_ssfo_fv_add_nr;
+            else
+              if (start->v[6].d_dd_f == subtract_d_dd)
+                start->v[0].fp = opt_d_7pid_ssfo_fv_sub_nr;
+          }}
   else
     if (start->v[0].fp == i_to_p)
       start->v[0].fp = i_to_p_nr;
@@ -65932,9 +65932,9 @@ static bool opt_cell_begin(s7_scheme *sc, s7_pointer car_x, int32_t len)
     {
       opt_info *start = sc->opts[sc->pc];
       if (!cell_optimize(sc, p))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       if (is_pair(cdr(p)))
-	oo_idp_nr_fixup(start);
+        oo_idp_nr_fixup(start);
       opc->v[i].o1 = start;
     }
   opc->v[1].i = len - 2;
@@ -65967,10 +65967,10 @@ static s7_pointer opt_when_p(opt_info *o)
       s7_int i, len = o->v[1].i - 1;
       opt_info *o1;
       for (i = 0; i < len; i++)
-	{
-	  o1 = o->v[i + 5].o1;
-	  o1->v[0].fp(o1);
-	}
+        {
+          o1 = o->v[i + 5].o1;
+          o1->v[0].fp(o1);
+        }
       o1 = o->v[i + 5].o1;
       return(o1->v[0].fp(o1));
     }
@@ -66026,9 +66026,9 @@ static bool opt_cell_when(s7_scheme *sc, s7_pointer car_x, int32_t len)
     {
       opt_info *start = sc->opts[sc->pc];
       if (!cell_optimize(sc, p))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       if (is_pair(cdr(p)))
-	oo_idp_nr_fixup(start);
+        oo_idp_nr_fixup(start);
       opc->v[k].o1 = start;
     }
   opc->v[4].fb = opc->v[3].o1->v[0].fb;
@@ -66036,16 +66036,16 @@ static bool opt_cell_when(s7_scheme *sc, s7_pointer car_x, int32_t len)
   if (car(car_x) == sc->when_symbol)
     {
       if (len == 3)
-	opc->v[0].fp = opt_when_p_1;
+        opc->v[0].fp = opt_when_p_1;
       else
-	if (len == 4)
-	  {
-	    opc->v[0].fp = opt_when_p_2;
-	    opc->v[7].o1 = opc->v[6].o1;
-	    opc->v[8].fp = opc->v[7].o1->v[0].fp;
-	    opc->v[6].fp = opc->v[5].o1->v[0].fp;
-	  }
-	else opc->v[0].fp = opt_when_p;
+        if (len == 4)
+          {
+            opc->v[0].fp = opt_when_p_2;
+            opc->v[7].o1 = opc->v[6].o1;
+            opc->v[8].fp = opc->v[7].o1->v[0].fp;
+            opc->v[6].fp = opc->v[5].o1->v[0].fp;
+          }
+        else opc->v[0].fp = opt_when_p;
     }
   else opc->v[0].fp = (len == 3) ? opt_unless_p_1 : opt_unless_p;
   return_true(sc, car_x);
@@ -66077,10 +66077,10 @@ static s7_pointer opt_cond(opt_info *top)
       opt_info *o1 = top->v[clause + COND_O1].o1;
       opt_info *o2 = o1->v[4].o1;
       if (o2->v[0].fb(o2))
-	{
-	  s7_pointer res = cond_value(o1);
-	  return(res);
-	}}
+        {
+          s7_pointer res = cond_value(o1);
+          return(res);
+        }}
   return(top->sc->unspecified);
 }
 
@@ -66107,28 +66107,28 @@ static bool opt_cell_cond(s7_scheme *sc, s7_pointer car_x)
       s7_pointer clause = car(p), cp;
       int32_t blen;
       if ((branches >= (NUM_VUNIONS - COND_O1)) ||
-	  (!is_pair(clause)) ||
-	  (!is_pair(cdr(clause))) || /* leave the test->result case for later */
-	  (cadr(clause) == sc->feed_to_symbol))
-	return_false(sc, clause);
+          (!is_pair(clause)) ||
+          (!is_pair(cdr(clause))) || /* leave the test->result case for later */
+          (cadr(clause) == sc->feed_to_symbol))
+        return_false(sc, clause);
 
       last_clause = clause;
       top->v[branches + COND_O1].o1 = sc->opts[sc->pc];
       opc = alloc_opt_info(sc);
       opc->v[4].o1 = sc->opts[sc->pc];
       if (!bool_optimize(sc, clause))
-	return_false(sc, clause);
+        return_false(sc, clause);
 
       for (blen = 0, cp = cdr(clause); is_pair(cp); blen++, cp = cdr(cp))
-	{
-	  if (blen >= NUM_VUNIONS - COND_CLAUSE_O1)
-	    return_false(sc, cp);
-	  opc->v[blen + COND_CLAUSE_O1].o1 = sc->opts[sc->pc];
-	  if (!cell_optimize(sc, cp))
-	    return_false(sc, cp);
-	}
+        {
+          if (blen >= NUM_VUNIONS - COND_CLAUSE_O1)
+            return_false(sc, cp);
+          opc->v[blen + COND_CLAUSE_O1].o1 = sc->opts[sc->pc];
+          if (!cell_optimize(sc, cp))
+            return_false(sc, cp);
+        }
       if (!is_null(cp))
-	return_false(sc, cp);
+        return_false(sc, cp);
       opc->v[1].i = blen;
       if (max_blen < blen) max_blen = blen;
       opc->v[0].fp = opt_cond; /* a placeholder */
@@ -66145,18 +66145,18 @@ static bool opt_cell_cond(s7_scheme *sc, s7_pointer car_x)
   if (branches == 2)
     {
       if ((max_blen == 1) &&
-	  ((car(last_clause) == sc->else_symbol) || (car(last_clause) == sc->T)))
-	{
-	  opt_info *o1;
-	  top->v[6].o1 = top->v[COND_O1].o1->v[COND_CLAUSE_O1].o1;
-	  top->v[7].o1 = top->v[COND_O1 + 1].o1->v[COND_CLAUSE_O1].o1;
-
-	  o1 = sc->opts[start_pc + 1];
-	  top->v[4].o1 = o1;
-	  top->v[5].fb = o1->v[0].fb;
-	  top->v[0].fp = opt_cond_2;
-	  return_true(sc, car_x);
-	}}
+          ((car(last_clause) == sc->else_symbol) || (car(last_clause) == sc->T)))
+        {
+          opt_info *o1;
+          top->v[6].o1 = top->v[COND_O1].o1->v[COND_CLAUSE_O1].o1;
+          top->v[7].o1 = top->v[COND_O1 + 1].o1->v[COND_CLAUSE_O1].o1;
+
+          o1 = sc->opts[start_pc + 1];
+          top->v[4].o1 = o1;
+          top->v[5].fb = o1->v[0].fb;
+          top->v[0].fp = opt_cond_2;
+          return_true(sc, car_x);
+        }}
   top->v[2].i = branches;
   top->v[0].fp = opt_cond;
   return_true(sc, car_x);
@@ -66173,7 +66173,7 @@ static s7_pointer opt_and_any_p(opt_info *o)
       opt_info *o1 = o->v[i + 3].o1;
       val = o1->v[0].fp(o1);
       if (val == o->sc->F)
-	return(o->sc->F);
+        return(o->sc->F);
     }
   return(val);
 }
@@ -66191,7 +66191,7 @@ static s7_pointer opt_or_any_p(opt_info *o)
       opt_info *o1 = o->v[i + 3].o1;
       s7_pointer val = o1->v[0].fp(o1);
       if (val != o->sc->F)
-	return(val);
+        return(val);
     }
   return(o->sc->F);
 }
@@ -66204,11 +66204,11 @@ static bool opt_cell_and(s7_scheme *sc, s7_pointer car_x, int32_t len)
       opc->v[0].fp = ((car(car_x) == sc->or_symbol) ? opt_or_pp : opt_and_pp);
       opc->v[10].o1 = sc->opts[sc->pc];
       if (!cell_optimize(sc, cdr(car_x)))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       opc->v[11].fp = opc->v[10].o1->v[0].fp;
       opc->v[8].o1 = sc->opts[sc->pc];
       if (!cell_optimize(sc, cddr(car_x)))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       opc->v[9].fp = opc->v[8].o1->v[0].fp;
       return_true(sc, car_x);
     }
@@ -66218,11 +66218,11 @@ static bool opt_cell_and(s7_scheme *sc, s7_pointer car_x, int32_t len)
       opc->v[1].i = (len - 1);
       opc->v[0].fp = ((car(car_x) == sc->or_symbol) ? opt_or_any_p : opt_and_any_p);
       for (int32_t i = 3; is_pair(p); i++, p = cdr(p))
-	{
-	  opc->v[i].o1 = sc->opts[sc->pc];
-	  if (!cell_optimize(sc, p))
-	    return_false(sc, car_x);
-	}
+        {
+          opc->v[i].o1 = sc->opts[sc->pc];
+          if (!cell_optimize(sc, p))
+            return_false(sc, car_x);
+        }
       return_true(sc, car_x);
     }
   return_false(sc, car_x);
@@ -66294,130 +66294,130 @@ static bool opt_cell_if(s7_scheme *sc, s7_pointer car_x, int32_t len)
   if (len == 3)
     {
       if ((is_proper_list_2(sc, cadr(car_x))) && /* (not arg) */
-	  (caadr(car_x) == sc->not_symbol))
-	{
-	  if (bool_optimize(sc, cdadr(car_x)))
-	    {
-	      opt_info *top = sc->opts[sc->pc];
-	      if (cell_optimize(sc, cddr(car_x)))
-		{
-		  opc->v[10].o1 = top;
-		  opc->v[11].fp = top->v[0].fp;
-		  if (bop->v[0].fb == opt_b_p_s)
-		    {
-		      opc->v[2].b_p_f = bop->v[2].b_p_f;
-		      opc->v[3].p = bop->v[1].p;
-		      opc->v[0].fp = opt_if_nbp_s;
-		      return_true(sc, car_x);
-		    }
-		  if ((bop->v[0].fb == opt_b_pi_fs) || (bop->v[0].fb == opt_b_pi_fs_num_eq))
-		    {
-		      opc->v[2].b_pi_f = bop->v[2].b_pi_f;
-		      opc->v[3].p = bop->v[1].p;
-		      opc->v[4].o1 = bop->v[10].o1;
-		      opc->v[5].fp = bop->v[11].fp;
-		      opc->v[0].fp = opt_if_nbp_fs;
-		      return_true(sc, car_x);
-		    }
-		  if ((bop->v[0].fb == opt_b_pp_sf) ||
-		      (bop->v[0].fb == opt_b_7pp_sf))
-		    {
-		      opc->v[4].o1 = bop->v[10].o1;
-		      opc->v[5].fp = bop->v[11].fp;
-		      if (bop->v[0].fb == opt_b_pp_sf)
-			{
-			  opc->v[2].b_pp_f = bop->v[3].b_pp_f;
-			  opc->v[0].fp = opt_if_nbp_sf;
-			}
-		      else
-			{
-			  opc->v[2].b_7pp_f = bop->v[3].b_7pp_f;
-			  opc->v[0].fp = opt_if_nbp_7sf;
-			}
-		      opc->v[3].p = bop->v[1].p;
-		      return_true(sc, car_x);
-		    }
-		  if ((bop->v[0].fb == opt_b_pp_sc) ||
-		      (bop->v[0].fb == opt_b_7pp_sc))
-		    {
-		      if (bop->v[0].fb == opt_b_pp_sc)
-			{
-			  opc->v[3].b_pp_f = bop->v[3].b_pp_f;
-			  opc->v[0].fp = opt_if_nbp_sc;
-			}
-		      else
-			{
-			  opc->v[3].b_7pp_f = bop->v[3].b_7pp_f;
-			  opc->v[0].fp = opt_if_nbp_7sc;
-			}
-		      opc->v[2].p = bop->v[1].p;
-		      opc->v[4].p = bop->v[2].p;
-		      return_true(sc, car_x);
-		    }
-		  if ((bop->v[0].fb == opt_b_ii_ss) || (bop->v[0].fb == opt_b_ii_ss_eq) ||
-		      (bop->v[0].fb == opt_b_ii_ss_lt) || (bop->v[0].fb == opt_b_ii_ss_gt) ||
-		      (bop->v[0].fb == opt_b_ii_ss_leq) || (bop->v[0].fb == opt_b_ii_ss_geq))
-		    {
-		      opc->v[3].b_ii_f = bop->v[3].b_ii_f;
-		      opc->v[2].p = bop->v[1].p;
-		      opc->v[4].p = bop->v[2].p;
-		      opc->v[0].fp = (opc->v[3].b_ii_f == num_eq_b_ii) ? opt_if_num_eq_ii_ss : opt_if_nbp_ss;
-		      return_true(sc, car_x);
-		    }
-		  opc->v[4].o1 = bop;
-		  opc->v[5].fb = bop->v[0].fb;
-		  opc->v[0].fp = opt_if_nbp;
-		  return_true(sc, car_x);
-		}}}
+          (caadr(car_x) == sc->not_symbol))
+        {
+          if (bool_optimize(sc, cdadr(car_x)))
+            {
+              opt_info *top = sc->opts[sc->pc];
+              if (cell_optimize(sc, cddr(car_x)))
+                {
+                  opc->v[10].o1 = top;
+                  opc->v[11].fp = top->v[0].fp;
+                  if (bop->v[0].fb == opt_b_p_s)
+                    {
+                      opc->v[2].b_p_f = bop->v[2].b_p_f;
+                      opc->v[3].p = bop->v[1].p;
+                      opc->v[0].fp = opt_if_nbp_s;
+                      return_true(sc, car_x);
+                    }
+                  if ((bop->v[0].fb == opt_b_pi_fs) || (bop->v[0].fb == opt_b_pi_fs_num_eq))
+                    {
+                      opc->v[2].b_pi_f = bop->v[2].b_pi_f;
+                      opc->v[3].p = bop->v[1].p;
+                      opc->v[4].o1 = bop->v[10].o1;
+                      opc->v[5].fp = bop->v[11].fp;
+                      opc->v[0].fp = opt_if_nbp_fs;
+                      return_true(sc, car_x);
+                    }
+                  if ((bop->v[0].fb == opt_b_pp_sf) ||
+                      (bop->v[0].fb == opt_b_7pp_sf))
+                    {
+                      opc->v[4].o1 = bop->v[10].o1;
+                      opc->v[5].fp = bop->v[11].fp;
+                      if (bop->v[0].fb == opt_b_pp_sf)
+                        {
+                          opc->v[2].b_pp_f = bop->v[3].b_pp_f;
+                          opc->v[0].fp = opt_if_nbp_sf;
+                        }
+                      else
+                        {
+                          opc->v[2].b_7pp_f = bop->v[3].b_7pp_f;
+                          opc->v[0].fp = opt_if_nbp_7sf;
+                        }
+                      opc->v[3].p = bop->v[1].p;
+                      return_true(sc, car_x);
+                    }
+                  if ((bop->v[0].fb == opt_b_pp_sc) ||
+                      (bop->v[0].fb == opt_b_7pp_sc))
+                    {
+                      if (bop->v[0].fb == opt_b_pp_sc)
+                        {
+                          opc->v[3].b_pp_f = bop->v[3].b_pp_f;
+                          opc->v[0].fp = opt_if_nbp_sc;
+                        }
+                      else
+                        {
+                          opc->v[3].b_7pp_f = bop->v[3].b_7pp_f;
+                          opc->v[0].fp = opt_if_nbp_7sc;
+                        }
+                      opc->v[2].p = bop->v[1].p;
+                      opc->v[4].p = bop->v[2].p;
+                      return_true(sc, car_x);
+                    }
+                  if ((bop->v[0].fb == opt_b_ii_ss) || (bop->v[0].fb == opt_b_ii_ss_eq) ||
+                      (bop->v[0].fb == opt_b_ii_ss_lt) || (bop->v[0].fb == opt_b_ii_ss_gt) ||
+                      (bop->v[0].fb == opt_b_ii_ss_leq) || (bop->v[0].fb == opt_b_ii_ss_geq))
+                    {
+                      opc->v[3].b_ii_f = bop->v[3].b_ii_f;
+                      opc->v[2].p = bop->v[1].p;
+                      opc->v[4].p = bop->v[2].p;
+                      opc->v[0].fp = (opc->v[3].b_ii_f == num_eq_b_ii) ? opt_if_num_eq_ii_ss : opt_if_nbp_ss;
+                      return_true(sc, car_x);
+                    }
+                  opc->v[4].o1 = bop;
+                  opc->v[5].fb = bop->v[0].fb;
+                  opc->v[0].fp = opt_if_nbp;
+                  return_true(sc, car_x);
+                }}}
       else
-	if (bool_optimize(sc, cdr(car_x)))
-	  {
-	    opt_info *top = sc->opts[sc->pc];
-	    if (cell_optimize(sc, cddr(car_x)))
-	      {
-		opc->v[2].o1 = bop;
-		opc->v[4].o1 = top;
-		opc->v[5].fp = top->v[0].fp;
-		if (bop->v[0].fb == p_to_b)
-		  {
-		    opc->v[0].fp = opt_if_bp_pb;
-		    opc->v[3].fp = bop->v[O_WRAP].fp;
-		    return_true(sc, car_x);
-		  }
-		if (bop->v[0].fb == opt_b_ii_fc)
-		  {
-		    opc->v[2].i = bop->v[2].i;
-		    opc->v[3].b_ii_f = bop->v[3].b_ii_f;
-		    opc->v[11].fi = bop->v[11].fi;
-		    opc->v[10].o1 = bop->v[10].o1;
-		    opc->v[0].fp = opt_if_bp_ii_fc;
-		    return_true(sc, car_x);
-		  }
-		opc->v[0].fp = (bop->v[0].fb == opt_b_7p_f) ? opt_if_b7p : ((bop->v[0].fb == opt_and_bb) ? opt_if_bp_and : opt_if_bp);
-		opc->v[3].fb = bop->v[0].fb;
-		return_true(sc, car_x);
-	      }}
+        if (bool_optimize(sc, cdr(car_x)))
+          {
+            opt_info *top = sc->opts[sc->pc];
+            if (cell_optimize(sc, cddr(car_x)))
+              {
+                opc->v[2].o1 = bop;
+                opc->v[4].o1 = top;
+                opc->v[5].fp = top->v[0].fp;
+                if (bop->v[0].fb == p_to_b)
+                  {
+                    opc->v[0].fp = opt_if_bp_pb;
+                    opc->v[3].fp = bop->v[O_WRAP].fp;
+                    return_true(sc, car_x);
+                  }
+                if (bop->v[0].fb == opt_b_ii_fc)
+                  {
+                    opc->v[2].i = bop->v[2].i;
+                    opc->v[3].b_ii_f = bop->v[3].b_ii_f;
+                    opc->v[11].fi = bop->v[11].fi;
+                    opc->v[10].o1 = bop->v[10].o1;
+                    opc->v[0].fp = opt_if_bp_ii_fc;
+                    return_true(sc, car_x);
+                  }
+                opc->v[0].fp = (bop->v[0].fb == opt_b_7p_f) ? opt_if_b7p : ((bop->v[0].fb == opt_and_bb) ? opt_if_bp_and : opt_if_bp);
+                opc->v[3].fb = bop->v[0].fb;
+                return_true(sc, car_x);
+              }}
       return_false(sc, car_x);
     }
   if (len == 4)
     {
       if (bool_optimize(sc, cdr(car_x)))
-	{
-	  opt_info *top = sc->opts[sc->pc];
-	  if (cell_optimize(sc, cddr(car_x)))
-	    {
-	      opt_info *o3 = sc->opts[sc->pc];
-	      opc->v[0].fp = (bop->v[0].fb == opt_b_7ii_sc_bit) ? opt_if_bpp_bit : opt_if_bpp;
-	      if (cell_optimize(sc, cdddr(car_x)))
-		{
-		  opc->v[4].o1 = bop;
-		  opc->v[5].fb = bop->v[0].fb;
-		  opc->v[8].o1 = top;
-		  opc->v[9].fp = top->v[0].fp;
-		  opc->v[10].o1 = o3;
-		  opc->v[11].fp = o3->v[0].fp;
-		  return_true(sc, car_x);
-		}}}}
+        {
+          opt_info *top = sc->opts[sc->pc];
+          if (cell_optimize(sc, cddr(car_x)))
+            {
+              opt_info *o3 = sc->opts[sc->pc];
+              opc->v[0].fp = (bop->v[0].fb == opt_b_7ii_sc_bit) ? opt_if_bpp_bit : opt_if_bpp;
+              if (cell_optimize(sc, cdddr(car_x)))
+                {
+                  opc->v[4].o1 = bop;
+                  opc->v[5].fb = bop->v[0].fb;
+                  opc->v[8].o1 = top;
+                  opc->v[9].fp = top->v[0].fp;
+                  opc->v[10].o1 = o3;
+                  opc->v[11].fp = o3->v[0].fp;
+                  return_true(sc, car_x);
+                }}}}
   return_false(sc, car_x);
 }
 
@@ -66450,25 +66450,25 @@ static s7_pointer opt_case(opt_info *o)
   if (is_simple(selector))
     {
       for (int32_t ctr = CASE_O1; ctr < lim; ctr++)
-	{
-	  s7_pointer z;
-	  o1 = o->v[ctr].o1;
-	  for (z = o1->v[CASE_CLAUSE_KEYS].p; is_pair(z); z = cdr(z))
-	    if (selector == car(z))
-	      return(case_value(o1));
-	  if (z == sc->else_symbol)
-	    return(case_value(o1));
-	}}
+        {
+          s7_pointer z;
+          o1 = o->v[ctr].o1;
+          for (z = o1->v[CASE_CLAUSE_KEYS].p; is_pair(z); z = cdr(z))
+            if (selector == car(z))
+              return(case_value(o1));
+          if (z == sc->else_symbol)
+            return(case_value(o1));
+        }}
   else
     for (int32_t ctr = CASE_O1; ctr < lim; ctr++)
       {
-	s7_pointer z;
-	o1 = o->v[ctr].o1;
-	for (z = o1->v[CASE_CLAUSE_KEYS].p; is_pair(z); z = cdr(z))
-	  if (s7_is_eqv(sc, selector, car(z)))
-	    return(case_value(o1));
-	if (z == sc->else_symbol)
-	  return(case_value(o1));
+        s7_pointer z;
+        o1 = o->v[ctr].o1;
+        for (z = o1->v[CASE_CLAUSE_KEYS].p; is_pair(z); z = cdr(z))
+          if (s7_is_eqv(sc, selector, car(z)))
+            return(case_value(o1));
+        if (z == sc->else_symbol)
+          return(case_value(o1));
       }
   return(sc->unspecified);
 }
@@ -66488,34 +66488,34 @@ static bool opt_cell_case(s7_scheme *sc, s7_pointer car_x)
       s7_pointer clause = car(p), cp;
       int32_t blen;
       if ((!is_pair(clause)) ||
-	  ((!is_pair(car(clause))) && (car(clause) != sc->else_symbol)) ||
-	  (!is_pair(cdr(clause))) ||
-	  (cadr(clause) == sc->feed_to_symbol))
-	return_false(sc, clause);
+          ((!is_pair(car(clause))) && (car(clause) != sc->else_symbol)) ||
+          (!is_pair(cdr(clause))) ||
+          (cadr(clause) == sc->feed_to_symbol))
+        return_false(sc, clause);
 
       opc = alloc_opt_info(sc);
       top->v[ctr].o1 = opc;
       if (car(clause) == sc->else_symbol)
-	{
-	  if (!is_null(cdr(p)))
-	    return_false(sc, clause);
-	  opc->v[CASE_CLAUSE_KEYS].p = sc->else_symbol;
-	}
+        {
+          if (!is_null(cdr(p)))
+            return_false(sc, clause);
+          opc->v[CASE_CLAUSE_KEYS].p = sc->else_symbol;
+        }
       else
-	{
-	  if (!s7_is_proper_list(sc, car(clause)))
-	    return_false(sc, clause);
-	  opc->v[CASE_CLAUSE_KEYS].p = car(clause);
-	}
+        {
+          if (!s7_is_proper_list(sc, car(clause)))
+            return_false(sc, clause);
+          opc->v[CASE_CLAUSE_KEYS].p = car(clause);
+        }
 
       for (blen = 0, cp = cdr(clause); (is_pair(cp)) && (blen < (NUM_VUNIONS - CASE_CLAUSE_O1)); blen++, cp = cdr(cp))
-	{
-	  opc->v[blen + CASE_CLAUSE_O1].o1 = sc->opts[sc->pc];
-	  if (!cell_optimize(sc, cp))
-	    return_false(sc, cp);
-	}
+        {
+          opc->v[blen + CASE_CLAUSE_O1].o1 = sc->opts[sc->pc];
+          if (!cell_optimize(sc, cp))
+            return_false(sc, cp);
+        }
       if (!is_null(cp))
-	return_false(sc, cp);
+        return_false(sc, cp);
       opc->v[1].i = blen;
       opc->v[0].fp = opt_case; /* just a placeholder I hope */
     }
@@ -66575,18 +66575,18 @@ static bool opt_cell_let_temporarily(s7_scheme *sc, s7_pointer car_x, int32_t le
       opt_info *opc = alloc_opt_info(sc);
       opc->v[1].p = s7_slot(sc, caaadr(car_x));
       if (!is_slot(opc->v[1].p))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
 
       opc->v[4].o1 = sc->opts[sc->pc];
       if (!cell_optimize(sc, cdaadr(car_x)))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
 
       for (i = LET_TEMP_O1, p = cddr(car_x); is_pair(p); i++, p = cdr(p))
-	{
-	  opc->v[i].o1 = sc->opts[sc->pc];
-	  if (!cell_optimize(sc, p))
-	    return_false(sc, car_x);
-	}
+        {
+          opc->v[i].o1 = sc->opts[sc->pc];
+          if (!cell_optimize(sc, p))
+            return_false(sc, car_x);
+        }
       opc->v[2].i = len - 2;
       opc->v[0].fp = opt_let_temporarily;
       return_true(sc, car_x);
@@ -66652,24 +66652,24 @@ static s7_pointer opt_do_any(opt_info *o)
     {
       /* end */
       if (ostart->v[0].fb(ostart))
-	break;
+        break;
       /* body */
       if (len == 6) /* here and in opt_do_n we need a better way to unroll these loops */
-	{fp[0](os[0]); fp[1](os[1]); fp[2](os[2]); fp[3](os[3]); fp[4](os[4]); fp[5](os[5]);}
+        {fp[0](os[0]); fp[1](os[1]); fp[2](os[2]); fp[3](os[3]); fp[4](os[4]); fp[5](os[5]);}
       else
-	if (len == 7)
-	  {fp[0](os[0]); fp[1](os[1]); fp[2](os[2]); fp[3](os[3]); fp[4](os[4]); fp[5](os[5]); fp[6](os[6]);}
-	else for (i = 0; i < len; i++) fp[i](os[i]);
+        if (len == 7)
+          {fp[0](os[0]); fp[1](os[1]); fp[2](os[2]); fp[3](os[3]); fp[4](os[4]); fp[5](os[5]); fp[6](os[6]);}
+        else for (i = 0; i < len; i++) fp[i](os[i]);
       /* step (let not let*) */
       for (k = 0, vp = let_slots(sc->curlet); tis_slot(vp); k++, vp = next_slot(vp))
-	if (has_stepper(vp))
-	  {
-	    o1 = steps->v[k].o1;
-	    slot_simply_set_pending_value(vp, o1->v[0].fp(o1));
-	  }
+        if (has_stepper(vp))
+          {
+            o1 = steps->v[k].o1;
+            slot_simply_set_pending_value(vp, o1->v[0].fp(o1));
+          }
       for (vp = let_slots(sc->curlet); tis_slot(vp); vp = next_slot(vp))
-	if (has_stepper(vp))
-	  slot_set_value(vp, slot_pending_value(vp));
+        if (has_stepper(vp))
+          slot_set_value(vp, slot_pending_value(vp));
     }
   /* result */
   result = sc->T;
@@ -66782,11 +66782,11 @@ static s7_pointer opt_do_no_vars(opt_info *o)
     {
       opt_info *body = do_no_vars_body(o);
       while (!(fb(ostart)))   /* tshoot, tfft */
-	for (int32_t i = 0; i < len; i++)
-	  {
-	    opt_info *o1 = body->v[i].o1;
-	    o1->v[0].fp(o1);
-	  }}
+        for (int32_t i = 0; i < len; i++)
+          {
+            opt_info *o1 = body->v[i].o1;
+            o1->v[0].fp(o1);
+          }}
   unstack_gc_protect(sc);
   set_curlet(sc, old_e);
   return(sc->T);
@@ -66811,26 +66811,26 @@ static s7_pointer opt_do_1(opt_info *o)
       (is_t_integer(slot_value(vp))))
     {
       if ((ostep->v[0].fp == opt_p_ii_ss_add) || /* tmap */
-	  (ostep->v[0].fp == i_to_p))
-	{
-	  s7_pointer step_val = make_mutable_integer(sc, integer(slot_value(vp)));
-	  slot_set_value(vp, step_val);
-	  if (ostep->v[0].fp == opt_p_ii_ss_add)
-	    while (!ostart->v[0].fb(ostart))
-	      {
-		body->v[0].fp(body);
-		set_integer(step_val, opt_i_ii_ss_add(ostep));
-	      }
-	  else
-	    while (!ostart->v[0].fb(ostart))
-	      {
-		body->v[0].fp(body);
-		set_integer(step_val, ostep->v[O_WRAP].fi(ostep));
-	      }
-	  unstack_gc_protect(sc);
-	  set_curlet(sc, old_e);
-	  return(sc->T);
-	}
+          (ostep->v[0].fp == i_to_p))
+        {
+          s7_pointer step_val = make_mutable_integer(sc, integer(slot_value(vp)));
+          slot_set_value(vp, step_val);
+          if (ostep->v[0].fp == opt_p_ii_ss_add)
+            while (!ostart->v[0].fb(ostart))
+              {
+                body->v[0].fp(body);
+                set_integer(step_val, opt_i_ii_ss_add(ostep));
+              }
+          else
+            while (!ostart->v[0].fb(ostart))
+              {
+                body->v[0].fp(body);
+                set_integer(step_val, ostep->v[O_WRAP].fi(ostep));
+              }
+          unstack_gc_protect(sc);
+          set_curlet(sc, old_e);
+          return(sc->T);
+        }
       o->v[8].i = 2;
     }
   while (!(ostart->v[0].fb(ostart)))   /* s7test tref */
@@ -66863,32 +66863,32 @@ static s7_pointer opt_do_n(opt_info *o)
     {
       opt_info *e1 = body->v[0].o1, *e2 = body->v[1].o1;
       while (!(ostart->v[0].fb(ostart)))
-	{
-	  e1->v[0].fp(e1);
-	  e2->v[0].fp(e2);
-	  slot_set_value(vp, ostep->v[0].fp(ostep));
-	}}
+        {
+          e1->v[0].fp(e1);
+          e2->v[0].fp(e2);
+          slot_set_value(vp, ostep->v[0].fp(ostep));
+        }}
   else
     {
       opt_info *os[NUM_VUNIONS];
       opt_info_fp fp[NUM_VUNIONS];
       for (int32_t i = 0; i < len; i++)
-	{
-	  os[i] = body->v[i].o1;
-	  fp[i] = os[i]->v[0].fp;
-	}
+        {
+          os[i] = body->v[i].o1;
+          fp[i] = os[i]->v[0].fp;
+        }
       if (len == 7)
-	while (!ostart->v[0].fb(ostart)) /* tfft teq */ /* this is probably fft code */
-	  {
-	    fp[0](os[0]); fp[1](os[1]); fp[2](os[2]); fp[3](os[3]); fp[4](os[4]); fp[5](os[5]); fp[6](os[6]);
-	    slot_set_value(vp, ostep->v[0].fp(ostep));
-	  }
+        while (!ostart->v[0].fb(ostart)) /* tfft teq */ /* this is probably fft code */
+          {
+            fp[0](os[0]); fp[1](os[1]); fp[2](os[2]); fp[3](os[3]); fp[4](os[4]); fp[5](os[5]); fp[6](os[6]);
+            slot_set_value(vp, ostep->v[0].fp(ostep));
+          }
       else
-	while (!ostart->v[0].fb(ostart)) /* tfft teq */
-	  {
-	    for (int32_t i = 0; i < len; i++) fp[i](os[i]);
-	    slot_set_value(vp, ostep->v[0].fp(ostep));
-	  }}
+        while (!ostart->v[0].fb(ostart)) /* tfft teq */
+          {
+            for (int32_t i = 0; i < len; i++) fp[i](os[i]);
+            slot_set_value(vp, ostep->v[0].fp(ostep));
+          }}
   unstack_gc_protect(sc);
   set_curlet(sc, old_e);
   return(sc->T);
@@ -66911,20 +66911,20 @@ static s7_pointer opt_do_times(opt_info *o)
     {
       opt_info *e1 = body->v[0].o1, *e2 = body->v[1].o1;
       while (integer(vp) < end)
-	{
-	  e1->v[0].fp(e1);
-	  e2->v[0].fp(e2);
-	  integer(vp)++;
-	}}
+        {
+          e1->v[0].fp(e1);
+          e2->v[0].fp(e2);
+          integer(vp)++;
+        }}
   else
     while (integer(vp) < end)  /* tbig sg */
       {
-	for (int32_t i = 0; i < len; i++)
-	  {
-	    o1 = body->v[i].o1;
-	    o1->v[0].fp(o1);
-	  }
-	integer(vp)++;
+        for (int32_t i = 0; i < len; i++)
+          {
+            o1 = body->v[i].o1;
+            o1->v[0].fp(o1);
+          }
+        integer(vp)++;
       }
   unstack_gc_protect(sc);
   set_curlet(sc, old_e);
@@ -66946,15 +66946,15 @@ static s7_pointer opt_do_list_simple(opt_info *o)
   if (fp == opt_if_bp)
     while (is_pair(slot_value(vp)))
       {
-	if (o1->v[3].fb(o1->v[2].o1))
-	  o1->v[5].fp(o1->v[4].o1);
-	slot_set_value(vp, cdr(slot_value(vp)));
+        if (o1->v[3].fb(o1->v[2].o1))
+          o1->v[5].fp(o1->v[4].o1);
+        slot_set_value(vp, cdr(slot_value(vp)));
       }
   else
     while (!is_null(slot_value(vp)))
       {
-	fp(o1);
-	slot_set_value(vp, cdr(slot_value(vp)));
+        fp(o1);
+        slot_set_value(vp, cdr(slot_value(vp)));
       }
   unstack_gc_protect(sc);
   set_curlet(sc, old_e);
@@ -66980,72 +66980,72 @@ static s7_pointer opt_do_very_simple(opt_info *o)
       opt_info *o2 = o1;
       o1 = o2->v[4].o1;
       if (o2->v[3].p_pip_f == t_vector_set_p_pip_direct)
-	{
-	  s7_pointer v = slot_value(o2->v[1].p);
-	  while (integer(vp) < end)
-	    {
-	      t_vector_set_p_pip_direct(o2->sc, v, integer(slot_value(o2->v[2].p)), o1->v[0].fp(o1));
-	      integer(vp)++;
-	    }}
+        {
+          s7_pointer v = slot_value(o2->v[1].p);
+          while (integer(vp) < end)
+            {
+              t_vector_set_p_pip_direct(o2->sc, v, integer(slot_value(o2->v[2].p)), o1->v[0].fp(o1));
+              integer(vp)++;
+            }}
       else
-	while (integer(vp) < end)
-	  {
-	    o2->v[3].p_pip_f(o2->sc, slot_value(o2->v[1].p), integer(slot_value(o2->v[2].p)), o1->v[0].fp(o1));
-	    integer(vp)++;
-	  }}
+        while (integer(vp) < end)
+          {
+            o2->v[3].p_pip_f(o2->sc, slot_value(o2->v[1].p), integer(slot_value(o2->v[2].p)), o1->v[0].fp(o1));
+            integer(vp)++;
+          }}
   else
     {
       if (f == opt_p_pip_sso)
-	{ /* vector-set from vector-ref (i.e. copy), but treating vector-* as generic */
-	  if (((let_dox_slot1(do_curlet_unchecked(o)) == o1->v[2].p) && (o1->v[2].p == o1->v[4].p)) &&
-	      (((o1->v[5].p_pip_f == float_vector_set_p_pip_direct) && (o1->v[6].p_pi_f == float_vector_ref_p_pi_direct)) ||
-	       ((o1->v[5].p_pip_f == int_vector_set_p_pip_direct) &&   (o1->v[6].p_pi_f == int_vector_ref_p_pi_direct))   ||
-	       ((o1->v[5].p_pip_f == string_set_p_pip_direct) &&       (o1->v[6].p_pi_f == string_ref_p_pi_direct))       ||
-	       ((o1->v[5].p_pip_f == byte_vector_set_p_pip_direct) &&  (o1->v[6].p_pi_f == byte_vector_ref_p_pi_direct))))
-	    {
-	      copy_to_same_type(sc, slot_value(o1->v[1].p), slot_value(o1->v[3].p), integer(vp), end, integer(vp));
-	      unstack_gc_protect(sc);
-	      set_curlet(sc, old_e);
-	      return(sc->T);
-	    }
-	  while (integer(vp) < end)
-	    {
-	      o1->v[5].p_pip_f(o1->sc, slot_value(o1->v[1].p), integer(slot_value(o1->v[2].p)),
-			       o1->v[6].p_pi_f(o1->sc, slot_value(o1->v[3].p), integer(slot_value(o1->v[4].p))));
-	      integer(vp)++;
-	    }}
+        { /* vector-set from vector-ref (i.e. copy), but treating vector-* as generic */
+          if (((let_dox_slot1(do_curlet_unchecked(o)) == o1->v[2].p) && (o1->v[2].p == o1->v[4].p)) &&
+              (((o1->v[5].p_pip_f == float_vector_set_p_pip_direct) && (o1->v[6].p_pi_f == float_vector_ref_p_pi_direct)) ||
+               ((o1->v[5].p_pip_f == int_vector_set_p_pip_direct) &&   (o1->v[6].p_pi_f == int_vector_ref_p_pi_direct))   ||
+               ((o1->v[5].p_pip_f == string_set_p_pip_direct) &&       (o1->v[6].p_pi_f == string_ref_p_pi_direct))       ||
+               ((o1->v[5].p_pip_f == byte_vector_set_p_pip_direct) &&  (o1->v[6].p_pi_f == byte_vector_ref_p_pi_direct))))
+            {
+              copy_to_same_type(sc, slot_value(o1->v[1].p), slot_value(o1->v[3].p), integer(vp), end, integer(vp));
+              unstack_gc_protect(sc);
+              set_curlet(sc, old_e);
+              return(sc->T);
+            }
+          while (integer(vp) < end)
+            {
+              o1->v[5].p_pip_f(o1->sc, slot_value(o1->v[1].p), integer(slot_value(o1->v[2].p)),
+                               o1->v[6].p_pi_f(o1->sc, slot_value(o1->v[3].p), integer(slot_value(o1->v[4].p))));
+              integer(vp)++;
+            }}
       else
-	if ((f == opt_set_p_i_f) &&                      /* tvect.scm */
-	    (is_t_integer(slot_value(o1->v[1].p))) &&
-	    (o1->v[1].p != let_dox_slot1(do_curlet(o))))
-	  {
-	    opt_info *o2 = o1->v[5].o1;                  /* set_p_i_f: x = make_integer(o->sc, o->v[6].fi(o->v[5].o1)); */
-	    s7_int (*fi)(opt_info *o) = o2->v[0].fi;
-	    s7_pointer ival = make_mutable_integer(sc, integer(slot_value(o1->v[1].p)));
-	    slot_set_value(o1->v[1].p, ival);
-	    while (integer(vp) < end)
-	      {
-		set_integer(ival, fi(o2));
-		integer(vp)++;
-	      }
-	    slot_set_value(o1->v[1].p, make_integer(sc, integer(slot_value(o1->v[1].p))));
-	  }
-	else
-	  if ((f == opt_d_7pid_ssf_nr) &&           /* tref.scm */
-	      (o1->v[4].d_7pid_f == float_vector_set_d_7pid_direct))
-	    {
-	      s7_pointer ind = o1->v[2].p;
-	      opt_info *o2 = do_any_body(o1);
-	      s7_double (*fd)(opt_info *o) = o2->v[0].fd;
-	      s7_pointer fv = slot_value(o1->v[1].p);
-	      while (integer(vp) < end)
-		{
-		  float_vector_set_d_7pid_direct(sc, fv, integer(slot_value(ind)), fd(o2));
-		  /* weird! els[integer(slot_value(ind))] = fd(o2) is much slower according to callgrind? */
-		  integer(vp)++;
-		}}
-	  else
-	    while (integer(vp) < end) {f(o1); integer(vp)++;}}
+        if ((f == opt_set_p_i_f) &&                      /* tvect.scm */
+            (is_t_integer(slot_value(o1->v[1].p))) &&
+            (o1->v[1].p != let_dox_slot1(do_curlet(o))))
+          {
+            opt_info *o2 = o1->v[5].o1;                  /* set_p_i_f: x = make_integer(o->sc, o->v[6].fi(o->v[5].o1)); */
+            s7_int (*fi)(opt_info *o) = o2->v[0].fi;
+            s7_pointer ival = make_mutable_integer(sc, integer(slot_value(o1->v[1].p)));
+            slot_set_value(o1->v[1].p, ival);
+            while (integer(vp) < end)
+              {
+                set_integer(ival, fi(o2));
+                integer(vp)++;
+              }
+            slot_set_value(o1->v[1].p, make_integer(sc, integer(slot_value(o1->v[1].p))));
+          }
+        else
+          if ((f == opt_d_7pid_ssf_nr) &&           /* tref.scm */
+              (o1->v[4].d_7pid_f == float_vector_set_d_7pid_direct))
+            {
+              s7_pointer ind = o1->v[2].p;
+              opt_info *o2 = do_any_body(o1);
+              s7_double (*fd)(opt_info *o) = o2->v[0].fd;
+              s7_pointer fv = slot_value(o1->v[1].p);
+              while (integer(vp) < end)
+                {
+                  float_vector_set_d_7pid_direct(sc, fv, integer(slot_value(ind)), fd(o2));
+                  /* weird! els[integer(slot_value(ind))] = fd(o2) is much slower according to callgrind? */
+                  integer(vp)++;
+                }}
+          else
+            while (integer(vp) < end) {f(o1); integer(vp)++;}}
           /* splitting out opt_set_p_d_f_sf_add here (for tgsl.scm) is marginal (time is in opt_d_dd_ff_mul -> opt_d_id_sf -> bessel funcs) */
   unstack_gc_protect(sc);
   set_curlet(sc, old_e);
@@ -67100,9 +67100,9 @@ static bool stop_is_safe(s7_scheme *sc, s7_pointer stop, s7_pointer body)
   /* this could be folded into the cell_optimize traversal */
   for (s7_pointer p = body; is_pair(p); p = cdr(p))
     if ((is_pair(car(p))) &&
-	(caar(p) == sc->set_symbol) &&
-	(is_pair(cdar(p))) &&
-	(cadar(p) == stop))
+        (caar(p) == sc->set_symbol) &&
+        (is_pair(cdar(p))) &&
+        (cadar(p) == stop))
       return(!s7_tree_memq(sc, stop, cdr(p)));
   return(true);
 }
@@ -67130,7 +67130,7 @@ static bool do_passes_safety_check(s7_scheme *sc, s7_pointer body, s7_pointer st
     {
       set_safety_checked(body);
       if (!(do_is_safe(sc, body, stepper, sc->nil, step_vars, has_set)))
-	set_unsafe_do(body);
+        set_unsafe_do(body);
     }
   return(!is_unsafe_do(body));
 }
@@ -67143,10 +67143,10 @@ static bool all_integers(s7_scheme *sc, s7_pointer expr)
     {
       s7_pointer p;
       for (p = cdr(expr); is_pair(p); p = cdr(p))
-	if (!((is_t_integer(car(p))) ||
-	      ((is_symbol(car(p))) && (is_t_integer(slot_value(s7_slot(sc, car(p)))))) ||
-	      ((is_pair(car(p))) && (all_integers(sc, car(p))))))
-	  break;
+        if (!((is_t_integer(car(p))) ||
+              ((is_symbol(car(p))) && (is_t_integer(slot_value(s7_slot(sc, car(p)))))) ||
+              ((is_pair(car(p))) && (all_integers(sc, car(p))))))
+          break;
       return(is_null(p));
     }
   return(false);
@@ -67158,10 +67158,10 @@ static bool all_floats(s7_scheme *sc, s7_pointer expr)
     {
       s7_pointer p;
       for (p = cdr(expr); is_pair(p); p = cdr(p))
-	if (!((is_t_real(car(p))) ||
-	      ((is_symbol(car(p))) && (is_t_real(slot_value(s7_slot(sc, car(p)))))) ||
-	      ((is_pair(car(p))) && (all_floats(sc, car(p))))))
-	  break;
+        if (!((is_t_real(car(p))) ||
+              ((is_symbol(car(p))) && (is_t_real(slot_value(s7_slot(sc, car(p)))))) ||
+              ((is_pair(car(p))) && (all_floats(sc, car(p))))))
+          break;
       return(is_null(p));
     }
   return(false);
@@ -67200,17 +67200,17 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
     {
       s7_pointer var = car(p);
       if ((is_pair(var)) &&
-	  (is_symbol(car(var))) &&
-	  (is_pair(cdr(var))))
-	{
-	  s7_pointer sym = car(var);
-	  if (is_constant_symbol(sc, sym))
-	    return_false(sc, car_x);
-	  if (symbol_is_in_list(sc, sym))
-	    syntax_error_nr(sc, "duplicate identifier in do: ~A", 30, var);
-	  add_symbol_to_list(sc, sym);
-	  add_slot(sc, let, sym, sc->undefined);
-	}
+          (is_symbol(car(var))) &&
+          (is_pair(cdr(var))))
+        {
+          s7_pointer sym = car(var);
+          if (is_constant_symbol(sc, sym))
+            return_false(sc, car_x);
+          if (symbol_is_in_list(sc, sym))
+            syntax_error_nr(sc, "duplicate identifier in do: ~A", 30, var);
+          add_symbol_to_list(sc, sym);
+          add_slot(sc, let, sym, sc->undefined);
+        }
       else return_false(sc, car_x);
     }
   if (tis_slot(let_slots(let)))
@@ -67222,69 +67222,69 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
     init_pc = sc->pc;
     for (k = 0, p = cadr(car_x), slot = let_slots(let); (is_pair(p)) && (k < SIZE_O); k++, p = cdr(p), slot = next_slot(slot))
       {
-	s7_pointer var = car(p);
-	init_o[k] = sc->opts[sc->pc];
-	if (!cell_optimize(sc, cdr(var))) /* opt init in outer let */
-	  return_false(sc, car_x);
-	if (is_pair(cddr(var)))
-	  {
-	    set_has_stepper(slot);
-	    if (!is_null(cdddr(var)))
-	      return_false(sc, car_x);
-	  }
-	else
-	  {
-	    step_len--;
-	    if (!is_null(cddr(var)))
-	      return_false(sc, car_x);
-	  }
-	/* we can't use slot_set_value(slot, init_o[k]->v[0].fp(init_o[k])) to get the init value here: it might involve side-effects,
-	 *   and in some contexts might access variables that aren't set up yet.  So, we kludge around...
-	 */
-	if (is_symbol(cadr(var)))
-	  slot_set_value(slot, slot_value(s7_slot(sc, cadr(var))));
-	else
-	  if (!is_pair(cadr(var)))
-	    slot_set_value(slot, cadr(var));
-	  else
-	    if (is_proper_quote(sc, cadr(var)))
-	      slot_set_value(slot, cadadr(var));
-	    else
-	      {
-		s7_pointer sf = lookup_checked(sc, caadr(var));
-		if (is_c_function(sf))
-		  {
-		    s7_pointer sig = c_function_signature(sf);
-		    if (is_pair(sig))
-		      {
-			if ((car(sig) == sc->is_integer_symbol) ||
-			    ((is_pair(car(sig))) &&
-			     (direct_memq(sc->is_integer_symbol, car(sig)))) ||
-			    (all_integers(sc, cadr(var))))
-			  slot_set_value(slot, int_zero);
-			else
-			  if ((car(sig) == sc->is_float_symbol) ||
-			      ((is_pair(car(sig))) &&
-			       (direct_memq(sc->is_float_symbol, car(sig)))) ||
-			      (all_floats(sc, cadr(var))))
-			    slot_set_value(slot, real_zero);
-			/* need for stepper too -- how does it know (+ x 0.1) is float? try (i 0 (floor (+ i 1))) etc */
-		      }}}}
+        s7_pointer var = car(p);
+        init_o[k] = sc->opts[sc->pc];
+        if (!cell_optimize(sc, cdr(var))) /* opt init in outer let */
+          return_false(sc, car_x);
+        if (is_pair(cddr(var)))
+          {
+            set_has_stepper(slot);
+            if (!is_null(cdddr(var)))
+              return_false(sc, car_x);
+          }
+        else
+          {
+            step_len--;
+            if (!is_null(cddr(var)))
+              return_false(sc, car_x);
+          }
+        /* we can't use slot_set_value(slot, init_o[k]->v[0].fp(init_o[k])) to get the init value here: it might involve side-effects,
+         *   and in some contexts might access variables that aren't set up yet.  So, we kludge around...
+         */
+        if (is_symbol(cadr(var)))
+          slot_set_value(slot, slot_value(s7_slot(sc, cadr(var))));
+        else
+          if (!is_pair(cadr(var)))
+            slot_set_value(slot, cadr(var));
+          else
+            if (is_proper_quote(sc, cadr(var)))
+              slot_set_value(slot, cadadr(var));
+            else
+              {
+                s7_pointer sf = lookup_checked(sc, caadr(var));
+                if (is_c_function(sf))
+                  {
+                    s7_pointer sig = c_function_signature(sf);
+                    if (is_pair(sig))
+                      {
+                        if ((car(sig) == sc->is_integer_symbol) ||
+                            ((is_pair(car(sig))) &&
+                             (direct_memq(sc->is_integer_symbol, car(sig)))) ||
+                            (all_integers(sc, cadr(var))))
+                          slot_set_value(slot, int_zero);
+                        else
+                          if ((car(sig) == sc->is_float_symbol) ||
+                              ((is_pair(car(sig))) &&
+                               (direct_memq(sc->is_float_symbol, car(sig)))) ||
+                              (all_floats(sc, cadr(var))))
+                            slot_set_value(slot, real_zero);
+                        /* need for stepper too -- how does it know (+ x 0.1) is float? try (i 0 (floor (+ i 1))) etc */
+                      }}}}
     set_curlet(sc, let);
     for (p = cadr(car_x); is_pair(p); p = cdr(p))
       {
-	s7_pointer var = car(p);
-	if (is_pair(cddr(var)))
-	  {
-	    s7_pointer init_type = opt_arg_type(sc, cdr(var));
-	    if (((init_type == sc->is_integer_symbol) ||
-		 (init_type == sc->is_float_symbol)) &&
-		(opt_arg_type(sc, cddr(var)) != init_type))
-	      {
-		unstack_gc_protect(sc); /* not pop_stack! */
-		set_curlet(sc, old_e);
-		return_false(sc, car_x);
-	      }}}}
+        s7_pointer var = car(p);
+        if (is_pair(cddr(var)))
+          {
+            s7_pointer init_type = opt_arg_type(sc, cdr(var));
+            if (((init_type == sc->is_integer_symbol) ||
+                 (init_type == sc->is_float_symbol)) &&
+                (opt_arg_type(sc, cddr(var)) != init_type))
+              {
+                unstack_gc_protect(sc); /* not pop_stack! */
+                set_curlet(sc, old_e);
+                return_false(sc, car_x);
+              }}}}
 
   /* end test */
   end_test_pc = sc->pc;
@@ -67303,44 +67303,44 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
     {
       s7_pointer stop_slot = (is_symbol(caddr(stop))) ? opt_integer_symbol(sc, caddr(stop)) : sc->nil;
       if (stop_slot)
-	{
-	  s7_int lim = (is_slot(stop_slot)) ? integer(slot_value(stop_slot)) : integer(caddr(stop));
-	  bool set_stop = false;
-	  s7_pointer slot;
-
-	  if (car(stop) == sc->gt_symbol) lim++;
-	  for (p = cadr(car_x), slot = let_slots(let); is_pair(p); p = cdr(p), slot = next_slot(slot))
-	    {
-	      /* this could be put off until it is needed (ref/set), but this code is not called much
-	       *    another choice: go from init downto 0: init is lim
-	       */
-	      if (slot_symbol(slot) == cadr(stop))
-		set_stop = true; /* don't overrule this decision below */
-	      if (has_stepper(slot))
-		{
-		  s7_pointer var = car(p), step = caddr(var);
-		  if ((is_t_integer(slot_value(slot))) &&
-		      (is_pair(step)) &&
-		      (is_pair(cdr(step))) &&
-		      (car(var) == cadr(stop)) &&
-		      (car(var) == cadr(step)) &&
-		      ((car(stop) != sc->num_eq_symbol) || /* else > protects at least the top */
-		       ((caddr(step) == int_one) && (car(step) == sc->add_symbol))))
-		    {
-		      set_has_loop_end(slot);
-		      slot_set_value(slot, make_mutable_integer(sc, integer(slot_value(slot))));
-		      set_loop_end(slot, lim);
-		    }}}
-
-	  if (!set_stop)
-	    {
-	      s7_pointer slot2 = opt_integer_symbol(sc, cadr(stop));
-	      if ((slot2) &&
-		  (stop_is_safe(sc, cadr(stop), cddr(car_x)))) /* b_fft in tfft.scm */
-		{
-		  set_has_loop_end(slot2);
-		  set_loop_end(slot2, lim);
-		}}}}
+        {
+          s7_int lim = (is_slot(stop_slot)) ? integer(slot_value(stop_slot)) : integer(caddr(stop));
+          bool set_stop = false;
+          s7_pointer slot;
+
+          if (car(stop) == sc->gt_symbol) lim++;
+          for (p = cadr(car_x), slot = let_slots(let); is_pair(p); p = cdr(p), slot = next_slot(slot))
+            {
+              /* this could be put off until it is needed (ref/set), but this code is not called much
+               *    another choice: go from init downto 0: init is lim
+               */
+              if (slot_symbol(slot) == cadr(stop))
+                set_stop = true; /* don't overrule this decision below */
+              if (has_stepper(slot))
+                {
+                  s7_pointer var = car(p), step = caddr(var);
+                  if ((is_t_integer(slot_value(slot))) &&
+                      (is_pair(step)) &&
+                      (is_pair(cdr(step))) &&
+                      (car(var) == cadr(stop)) &&
+                      (car(var) == cadr(step)) &&
+                      ((car(stop) != sc->num_eq_symbol) || /* else > protects at least the top */
+                       ((caddr(step) == int_one) && (car(step) == sc->add_symbol))))
+                    {
+                      set_has_loop_end(slot);
+                      slot_set_value(slot, make_mutable_integer(sc, integer(slot_value(slot))));
+                      set_loop_end(slot, lim);
+                    }}}
+
+          if (!set_stop)
+            {
+              s7_pointer slot2 = opt_integer_symbol(sc, cadr(stop));
+              if ((slot2) &&
+                  (stop_is_safe(sc, cadr(stop), cddr(car_x)))) /* b_fft in tfft.scm */
+                {
+                  set_has_loop_end(slot2);
+                  set_loop_end(slot2, lim);
+                }}}}
 
   /* body */
   body_index = sc->pc;
@@ -67350,7 +67350,7 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
       body_o[k] = start;
       if (i < 5) opc->v[i + 7].o1 = start;
       if (!cell_optimize(sc, p))
-	break;
+        break;
       oo_idp_nr_fixup(start);
     }
   if (!is_null(p))
@@ -67370,8 +67370,8 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
       s7_pointer var = car(p);
       step_o[k] = sc->opts[sc->pc];
       if ((is_pair(cddr(var))) &&
-	  (!cell_optimize(sc, cddr(var))))
-	break;
+          (!cell_optimize(sc, cddr(var))))
+        break;
     }
   if (!is_null(p))
     {
@@ -67391,7 +67391,7 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
     {
       return_o[rtn_len] = sc->opts[sc->pc];
       if (!cell_optimize(sc, p))
-	break;
+        break;
     }
   if (!is_null(p))
     {
@@ -67412,12 +67412,12 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
       do_no_vars_test(opc) = sc->opts[end_test_pc];
       opc->v[0].fp = opt_do_no_vars;
       if (body_len > 0)
-	{
-	  body = alloc_opt_info(sc);
-	  for (k = 0; k < body_len; k++)
-	    body->v[k].o1 = body_o[k];
-	  do_no_vars_body(opc) = body;
-	}
+        {
+          body = alloc_opt_info(sc);
+          for (k = 0; k < body_len; k++)
+            body->v[k].o1 = body_o[k];
+          do_no_vars_body(opc) = body;
+        }
       return_true(sc, car_x);
     }
   opc->v[8].i = 0;
@@ -67425,14 +67425,14 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
     {
       s7_pointer expr = cadddr(car_x);
       if ((is_pair(expr)) &&
-	  ((is_c_function(car(expr))) ||
-	   (is_safe_setter(car(expr))) ||
-	   ((car(expr) == sc->set_symbol) &&
-	    (cadr(expr) != caaadr(car_x))) || /* caadr: (stepper init ...) */
-	   ((car(expr) == sc->vector_set_symbol) &&
-	    (is_null(cddddr(expr))) &&
-	    (is_code_constant(sc, cadddr(expr))))))
-	opc->v[8].i = 1;
+          ((is_c_function(car(expr))) ||
+           (is_safe_setter(car(expr))) ||
+           ((car(expr) == sc->set_symbol) &&
+            (cadr(expr) != caaadr(car_x))) || /* caadr: (stepper init ...) */
+           ((car(expr) == sc->vector_set_symbol) &&
+            (is_null(cddddr(expr))) &&
+            (is_code_constant(sc, cadddr(expr))))))
+        opc->v[8].i = 1;
     }
   if ((var_len != 1) || (step_len != 1) || (rtn_len != 0))
     {
@@ -67444,40 +67444,40 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
       do_any_test(opc) = sc->opts[end_test_pc];
 
       if ((opc->v[0].fp == opt_do_step_1) &&
-	  (opc->v[9].o1->v[0].fp == i_to_p) &&
-	  (opc->v[9].o1->v[O_WRAP].fi == opt_i_ii_sc_add) &&
-	  (do_any_test(opc)->v[0].fb == opt_b_ii_ss_eq))
-	opc->v[0].fp = opt_do_step_i;
+          (opc->v[9].o1->v[0].fp == i_to_p) &&
+          (opc->v[9].o1->v[O_WRAP].fi == opt_i_ii_sc_add) &&
+          (do_any_test(opc)->v[0].fb == opt_b_ii_ss_eq))
+        opc->v[0].fp = opt_do_step_i;
 
       inits = alloc_opt_info(sc);
       for (k = 0; k < var_len; k++)
-	inits->v[k].o1 = init_o[k];
+        inits->v[k].o1 = init_o[k];
       do_any_inits(opc) = inits;
 
       if (opc->v[0].fp == opt_do_any)
-	{
-	  opt_info *result, *step;
-	  opt_info *body = alloc_opt_info(sc);
-
-	  for (k = 0; k < body_len; k++)
-	    body->v[k].o1 = body_o[k];
-	  do_any_body(opc) = body;
-
-	  result = alloc_opt_info(sc);
-	  for (k = 0; k < rtn_len; k++)
-	    result->v[k].o1 = return_o[k];
-	  do_any_results(opc) = result;
-
-	  step = alloc_opt_info(sc);
-	  for (k = 0; k < var_len; k++)
-	    step->v[k].o1 = step_o[k];
-	  do_any_steps(opc) = step;
-	}
+        {
+          opt_info *result, *step;
+          opt_info *body = alloc_opt_info(sc);
+
+          for (k = 0; k < body_len; k++)
+            body->v[k].o1 = body_o[k];
+          do_any_body(opc) = body;
+
+          result = alloc_opt_info(sc);
+          for (k = 0; k < rtn_len; k++)
+            result->v[k].o1 = return_o[k];
+          do_any_results(opc) = result;
+
+          step = alloc_opt_info(sc);
+          for (k = 0; k < var_len; k++)
+            step->v[k].o1 = step_o[k];
+          do_any_steps(opc) = step;
+        }
       else
-	{
-	  do_any_body(opc) = sc->opts[body_index];
-	  do_any_results(opc) = return_o[0];
-	}
+        {
+          do_any_body(opc) = sc->opts[body_index];
+          do_any_results(opc) = return_o[0];
+        }
       return_true(sc, car_x);
     }
 
@@ -67493,7 +67493,7 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
     {
       opt_info *body = alloc_opt_info(sc);
       for (k = 0; k < body_len; k++)
-	body->v[k].o1 = body_o[k];
+        body->v[k].o1 = body_o[k];
       do_n_body(opc) = body;
     }
   do_stepper_init(opc) = sc->opts[init_pc];
@@ -67507,51 +67507,51 @@ static bool opt_cell_do(s7_scheme *sc, s7_pointer car_x, int32_t len)
       /* we can't use loop_end_possible here yet (not set except for op_dox?) */
 
       if (((car(end) == sc->num_eq_symbol) || (car(end) == sc->geq_symbol)) &&
-	  ((is_symbol(caddr(end))) || (is_t_integer(caddr(end)))) &&
-	  (is_null(cdddr(end))) &&
-	  (car(ind_step) == sc->add_symbol) &&
-	  (cadr(ind_step) == ind) &&
-	  (caddr(ind_step) == int_one) &&
-	  (is_null(cdddr(ind_step))) &&
-	  (do_passes_safety_check(sc, cdddr(car_x), ind, cadr(car_x), &has_set)))
-	{
-	  s7_pointer slot = let_slots(let);
-	  let_set_dox_slot1(let, slot);
-	  let_set_dox_slot2_unchecked(let, (is_symbol(caddr(end))) ? s7_slot(sc, caddr(end)) : sc->undefined);
-	  slot_set_value(slot, make_mutable_integer(sc, integer(slot_value(slot))));
-	  opc->v[4].i = body_index;
-	  if (body_len == 1) /* opt_do_1 */
-	    {
-	      opt_info *o1 = sc->opts[body_index];
-	      opc->v[0].fp = opt_do_very_simple;
-	      if (is_t_integer(caddr(end)))
-		opc->v[3].i = integer(caddr(end));
-	      if (o1->v[0].fp == d_to_p_nr) /* snd-test: (do ((k 0 (+ k 1))) ((= k N)) (float-vector-set! rl k (read-sample rd))) */
-		{
-		  opc->v[0].fp = opt_do_prepackaged;
-		  opc->v[7].fp = opt_do_dpnr;
-		}
-	      else
-		if (o1->v[0].fp == i_to_p_nr)
-		  {
-		    opc->v[0].fp = opt_do_prepackaged;
-		    opc->v[7].fp = opt_do_ipnr;
-		  }}
-	  else
-	    {
-	      opc->v[0].fp = opt_do_times;
-	      if (is_t_integer(caddr(end)))
-		opc->v[6].i = integer(caddr(end));
-	    }}
+          ((is_symbol(caddr(end))) || (is_t_integer(caddr(end)))) &&
+          (is_null(cdddr(end))) &&
+          (car(ind_step) == sc->add_symbol) &&
+          (cadr(ind_step) == ind) &&
+          (caddr(ind_step) == int_one) &&
+          (is_null(cdddr(ind_step))) &&
+          (do_passes_safety_check(sc, cdddr(car_x), ind, cadr(car_x), &has_set)))
+        {
+          s7_pointer slot = let_slots(let);
+          let_set_dox_slot1(let, slot);
+          let_set_dox_slot2_unchecked(let, (is_symbol(caddr(end))) ? s7_slot(sc, caddr(end)) : sc->undefined);
+          slot_set_value(slot, make_mutable_integer(sc, integer(slot_value(slot))));
+          opc->v[4].i = body_index;
+          if (body_len == 1) /* opt_do_1 */
+            {
+              opt_info *o1 = sc->opts[body_index];
+              opc->v[0].fp = opt_do_very_simple;
+              if (is_t_integer(caddr(end)))
+                opc->v[3].i = integer(caddr(end));
+              if (o1->v[0].fp == d_to_p_nr) /* snd-test: (do ((k 0 (+ k 1))) ((= k N)) (float-vector-set! rl k (read-sample rd))) */
+                {
+                  opc->v[0].fp = opt_do_prepackaged;
+                  opc->v[7].fp = opt_do_dpnr;
+                }
+              else
+                if (o1->v[0].fp == i_to_p_nr)
+                  {
+                    opc->v[0].fp = opt_do_prepackaged;
+                    opc->v[7].fp = opt_do_ipnr;
+                  }}
+          else
+            {
+              opc->v[0].fp = opt_do_times;
+              if (is_t_integer(caddr(end)))
+                opc->v[6].i = integer(caddr(end));
+            }}
       else
-	if ((car(end) == sc->is_null_symbol) &&
-	    (is_null(cddr(end))) &&
-	    (car(ind_step) == sc->cdr_symbol) &&
-	    (cadr(ind_step) == ind) &&
-	    (is_null(cddr(ind_step))) &&
-	    (body_len == 1) &&
-	    (do_passes_safety_check(sc, cdddr(car_x), ind, cadr(car_x), &has_set)))
-	  opc->v[0].fp = opt_do_list_simple;
+        if ((car(end) == sc->is_null_symbol) &&
+            (is_null(cddr(end))) &&
+            (car(ind_step) == sc->cdr_symbol) &&
+            (cadr(ind_step) == ind) &&
+            (is_null(cddr(ind_step))) &&
+            (body_len == 1) &&
+            (do_passes_safety_check(sc, cdddr(car_x), ind, cadr(car_x), &has_set)))
+          opc->v[0].fp = opt_do_list_simple;
     }
   return_true(sc, car_x);
 }
@@ -67607,8 +67607,8 @@ static bool float_optimize_1(s7_scheme *sc, s7_pointer expr)
   if (is_symbol(head))
     {
       if ((is_syntactic_symbol(head)) ||
-	  (is_syntactic_pair(car_x)))
-	return(d_syntax_ok(sc, car_x, len));
+          (is_syntactic_pair(car_x)))
+        return(d_syntax_ok(sc, car_x, len));
 
       s_slot = s7_slot(sc, head);
       if (!is_slot(s_slot)) return_false(sc, car_x);
@@ -67623,55 +67623,55 @@ static bool float_optimize_1(s7_scheme *sc, s7_pointer expr)
     {
       opt_info *opc = alloc_opt_info(sc);
       switch (len)
-	{
-	case 1:
-	  return(d_ok(sc, opc, s_func));
-
-	case 2:                            /* (f v) or (f d): (env e) or (abs x) */
-	  return((d_d_ok(sc, opc, s_func, car_x)) ||
-		 (d_v_ok(sc, opc, s_func, car_x)) ||
-		 (d_p_ok(sc, opc, s_func, car_x)));
-
-	case 3:
-	  return((d_dd_ok(sc, opc, s_func, car_x)) ||
-		 (d_id_ok(sc, opc, s_func, car_x)) ||
-		 (d_vd_ok(sc, opc, s_func, car_x)) ||
-		 (d_pd_ok(sc, opc, s_func, car_x)) ||
-		 (d_ip_ok(sc, opc, s_func, car_x)) ||
-		 (d_7pi_ok(sc, opc, s_func, car_x)));
-
-	case 4:
-	  return((d_ddd_ok(sc, opc, s_func, car_x)) ||
-		 (d_7pid_ok(sc, opc, s_func, car_x)) ||
-		 (d_vid_ok(sc, opc, s_func, car_x)) ||
-		 (d_vdd_ok(sc, opc, s_func, car_x)) ||
-		 (d_7pii_ok(sc, opc, s_func, car_x)));
-
-	case 5:
-	  return((d_dddd_ok(sc, opc, s_func, car_x)) ||
-		 (d_7piid_ok(sc, opc, s_func, car_x)) ||
-		 (d_7piii_ok(sc, opc, s_func, car_x)));
-
-	case 6:
-	  if (d_7piiid_ok(sc, opc, s_func, car_x))
-	    return_true(sc, car_x);
-	  /* fall through */
-
-	default:
-	  return(d_add_any_ok(sc, opc, car_x));
-	}}
+        {
+        case 1:
+          return(d_ok(sc, opc, s_func));
+
+        case 2:                            /* (f v) or (f d): (env e) or (abs x) */
+          return((d_d_ok(sc, opc, s_func, car_x)) ||
+                 (d_v_ok(sc, opc, s_func, car_x)) ||
+                 (d_p_ok(sc, opc, s_func, car_x)));
+
+        case 3:
+          return((d_dd_ok(sc, opc, s_func, car_x)) ||
+                 (d_id_ok(sc, opc, s_func, car_x)) ||
+                 (d_vd_ok(sc, opc, s_func, car_x)) ||
+                 (d_pd_ok(sc, opc, s_func, car_x)) ||
+                 (d_ip_ok(sc, opc, s_func, car_x)) ||
+                 (d_7pi_ok(sc, opc, s_func, car_x)));
+
+        case 4:
+          return((d_ddd_ok(sc, opc, s_func, car_x)) ||
+                 (d_7pid_ok(sc, opc, s_func, car_x)) ||
+                 (d_vid_ok(sc, opc, s_func, car_x)) ||
+                 (d_vdd_ok(sc, opc, s_func, car_x)) ||
+                 (d_7pii_ok(sc, opc, s_func, car_x)));
+
+        case 5:
+          return((d_dddd_ok(sc, opc, s_func, car_x)) ||
+                 (d_7piid_ok(sc, opc, s_func, car_x)) ||
+                 (d_7piii_ok(sc, opc, s_func, car_x)));
+
+        case 6:
+          if (d_7piiid_ok(sc, opc, s_func, car_x))
+            return_true(sc, car_x);
+          /* fall through */
+
+        default:
+          return(d_add_any_ok(sc, opc, car_x));
+        }}
   else
     {
       if ((is_macro(s_func)) && (!no_cell_opt(expr)))
-	{
-	  s7_pointer body = closure_body(s_func);
-	  if ((is_null(cdr(body))) && (is_pair(car(body))) &&
-	      ((caar(body) == sc->list_symbol) || (caar(body) == sc->list_values_symbol) || (caar(body) == initial_value(sc->list_values_symbol))))
-	    {
-	      s7_pointer result = s7_macroexpand(sc, s_func, cdar(expr));
-	      if (result == sc->F) return_false(sc, car_x);
-	      return(float_optimize(sc, set_plist_1(sc, result)));
-	    }}
+        {
+          s7_pointer body = closure_body(s_func);
+          if ((is_null(cdr(body))) && (is_pair(car(body))) &&
+              ((caar(body) == sc->list_symbol) || (caar(body) == sc->list_values_symbol) || (caar(body) == initial_value(sc->list_values_symbol))))
+            {
+              s7_pointer result = s7_macroexpand(sc, s_func, cdar(expr));
+              if (result == sc->F) return_false(sc, car_x);
+              return(float_optimize(sc, set_plist_1(sc, result)));
+            }}
       if (!s_slot) return_false(sc, car_x);
       return(d_implicit_ok(sc, s_slot, car_x, len));
     }
@@ -67695,8 +67695,8 @@ static bool int_optimize_1(s7_scheme *sc, s7_pointer expr)
   if (is_symbol(head))
     {
       if ((is_syntactic_symbol(head)) ||
-	  (is_syntactic_pair(car_x)))
-	return(i_syntax_ok(sc, car_x, len));
+          (is_syntactic_pair(car_x)))
+        return(i_syntax_ok(sc, car_x, len));
       s_slot = s7_slot(sc, head);
       if (!is_slot(s_slot)) return_false(sc, car_x);
       s_func = slot_value(s_slot);
@@ -67710,44 +67710,44 @@ static bool int_optimize_1(s7_scheme *sc, s7_pointer expr)
     {
       opt_info *opc = alloc_opt_info(sc);
       switch (len)
-	{
-	case 2:
-	  return(i_idp_ok(sc, opc, s_func, car_x));
-
-	case 3:
-	  return((i_ii_ok(sc, opc, s_func, car_x)) ||
-		 (i_7pi_ok(sc, opc, s_func, car_x)));
-
-	case 4:
-	  return((i_iii_ok(sc, opc, s_func, car_x)) ||
-		 (i_7pii_ok(sc, opc, s_func, car_x)));
-
-	case 5:
-	  {
-	    int32_t pstart = sc->pc;
-	    if (i_7piii_ok(sc, opc, s_func, car_x))
-	      return_true(sc, car_x);
-	    sc->pc = pstart;
-	  }
-	  /* fall through */
-
-	default:
-	  return(((head == sc->add_symbol) ||
-		  (head == sc->multiply_symbol)) &&
-		 (i_add_any_ok(sc, opc, car_x)));
-	}}
+        {
+        case 2:
+          return(i_idp_ok(sc, opc, s_func, car_x));
+
+        case 3:
+          return((i_ii_ok(sc, opc, s_func, car_x)) ||
+                 (i_7pi_ok(sc, opc, s_func, car_x)));
+
+        case 4:
+          return((i_iii_ok(sc, opc, s_func, car_x)) ||
+                 (i_7pii_ok(sc, opc, s_func, car_x)));
+
+        case 5:
+          {
+            int32_t pstart = sc->pc;
+            if (i_7piii_ok(sc, opc, s_func, car_x))
+              return_true(sc, car_x);
+            sc->pc = pstart;
+          }
+          /* fall through */
+
+        default:
+          return(((head == sc->add_symbol) ||
+                  (head == sc->multiply_symbol)) &&
+                 (i_add_any_ok(sc, opc, car_x)));
+        }}
   else
     {
       if ((is_macro(s_func)) && (!no_cell_opt(expr)))
-	{
-	  s7_pointer body = closure_body(s_func);
-	  if ((is_null(cdr(body))) && (is_pair(car(body))) &&
-	      ((caar(body) == sc->list_symbol) || (caar(body) == sc->list_values_symbol) || (caar(body) == initial_value(sc->list_values_symbol))))
-	    {
-	      s7_pointer result = s7_macroexpand(sc, s_func, cdar(expr));
-	      if (result == sc->F) return_false(sc, car_x);
-	      return(int_optimize(sc, set_plist_1(sc, result)));
-	    }}
+        {
+          s7_pointer body = closure_body(s_func);
+          if ((is_null(cdr(body))) && (is_pair(car(body))) &&
+              ((caar(body) == sc->list_symbol) || (caar(body) == sc->list_values_symbol) || (caar(body) == initial_value(sc->list_values_symbol))))
+            {
+              s7_pointer result = s7_macroexpand(sc, s_func, cdar(expr));
+              if (result == sc->F) return_false(sc, car_x);
+              return(int_optimize(sc, set_plist_1(sc, result)));
+            }}
       if (!s_slot) return_false(sc, car_x);
       return(i_implicit_ok(sc, s_slot, car_x, len));
     }
@@ -67763,42 +67763,42 @@ static bool p_2x_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if (is_symbol(cadr(car_x)))
     {
       if ((is_pair(sig)) && (is_pair(cdr(sig))) && (is_pair(cddr(sig))) && (caddr(sig) == sc->is_integer_symbol))
-	{
-	  if (p_pi_ok(sc, opc, s_func, sig, car_x))
-	    return_true(sc, car_x);
-
-	  if ((car(sig) == sc->is_float_symbol) ||
-	      (car(sig) == sc->is_real_symbol))
-	    {
-	      s7_d_7pi_t f = s7_d_7pi_function(s_func);
-	      if (f)
-		{
-		  sc->pc = pstart - 1;
-		  if (float_optimize(sc, expr))
-		    {
-		      opc->v[O_WRAP].fd = opc->v[0].fd;
-		      opc->v[0].fp = d_to_p;
-		      return_true(sc, car_x);
-		    }}}
-	  sc->pc = pstart;
-	}}
+        {
+          if (p_pi_ok(sc, opc, s_func, sig, car_x))
+            return_true(sc, car_x);
+
+          if ((car(sig) == sc->is_float_symbol) ||
+              (car(sig) == sc->is_real_symbol))
+            {
+              s7_d_7pi_t f = s7_d_7pi_function(s_func);
+              if (f)
+                {
+                  sc->pc = pstart - 1;
+                  if (float_optimize(sc, expr))
+                    {
+                      opc->v[O_WRAP].fd = opc->v[0].fd;
+                      opc->v[0].fp = d_to_p;
+                      return_true(sc, car_x);
+                    }}}
+          sc->pc = pstart;
+        }}
   {
     s7_i_ii_t ifunc = s7_i_ii_function(s_func);
     sc->pc = pstart - 1;
     if ((ifunc) &&
-	(int_optimize(sc, expr)))
+        (int_optimize(sc, expr)))
       {
-	opc->v[O_WRAP].fi = opc->v[0].fi;
-	opc->v[0].fp = i_to_p;
-	if (opc->v[O_WRAP].fi == opt_i_ii_ss_add)
-	  opc->v[0].fp = opt_p_ii_ss_add;
-	return_true(sc, car_x);
+        opc->v[O_WRAP].fi = opc->v[0].fi;
+        opc->v[0].fp = i_to_p;
+        if (opc->v[O_WRAP].fi == opt_i_ii_ss_add)
+          opc->v[0].fp = opt_p_ii_ss_add;
+        return_true(sc, car_x);
       }}
   sc->pc = pstart;
   return((p_ii_ok(sc, opc, s_func, car_x, pstart)) ||
-	 (p_dd_ok(sc, opc, s_func, car_x, pstart)) ||
-	 (p_pp_ok(sc, opc, s_func, car_x, pstart)) ||
-	 (p_call_pp_ok(sc, opc, s_func, car_x, pstart)));
+         (p_dd_ok(sc, opc, s_func, car_x, pstart)) ||
+         (p_pp_ok(sc, opc, s_func, car_x, pstart)) ||
+         (p_call_pp_ok(sc, opc, s_func, car_x, pstart)));
 }
 
 static bool p_3x_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer car_x, int32_t pstart, s7_pointer expr)
@@ -67807,38 +67807,38 @@ static bool p_3x_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
   if (is_symbol(cadr(car_x)))
     {
       if ((is_pair(sig)) && (is_pair(cdr(sig))) && (is_pair(cddr(sig))) &&
-	  (caddr(sig) == sc->is_integer_symbol))
-	{
-	  if (p_pii_ok(sc, opc, s_func, car_x))
-	    return_true(sc, car_x);
-	  if (p_pip_ok(sc, opc, s_func, car_x))
-	    return_true(sc, car_x);
-
-	  if (((car(sig) == sc->is_float_symbol) ||
-	       (car(sig) == sc->is_real_symbol)) &&
-	      (s7_d_7pid_function(s_func)) &&
-	      (d_7pid_ok(sc, opc, s_func, car_x)))
-	    {
-	      /* if d_7pid is ok, we need d_to_p for cell_optimize */
-	      opc->v[O_WRAP].fd = opc->v[0].fd;
-	      opc->v[0].fp = d_to_p;
-	      return_true(sc, car_x);
-	    }
-
-	  sc->pc = pstart - 1;
-	  if ((car(sig) == sc->is_integer_symbol) &&
-	      (s7_i_7pii_function(s_func)) &&
-	      (i_7pii_ok(sc, alloc_opt_info(sc), s_func, car_x)))
-	    {
-	      opc->v[O_WRAP].fi = opc->v[0].fi;
-	      opc->v[0].fp = i_to_p;
-	      return_true(sc, car_x);
-	    }
-	  sc->pc = pstart;
-	}}
+          (caddr(sig) == sc->is_integer_symbol))
+        {
+          if (p_pii_ok(sc, opc, s_func, car_x))
+            return_true(sc, car_x);
+          if (p_pip_ok(sc, opc, s_func, car_x))
+            return_true(sc, car_x);
+
+          if (((car(sig) == sc->is_float_symbol) ||
+               (car(sig) == sc->is_real_symbol)) &&
+              (s7_d_7pid_function(s_func)) &&
+              (d_7pid_ok(sc, opc, s_func, car_x)))
+            {
+              /* if d_7pid is ok, we need d_to_p for cell_optimize */
+              opc->v[O_WRAP].fd = opc->v[0].fd;
+              opc->v[0].fp = d_to_p;
+              return_true(sc, car_x);
+            }
+
+          sc->pc = pstart - 1;
+          if ((car(sig) == sc->is_integer_symbol) &&
+              (s7_i_7pii_function(s_func)) &&
+              (i_7pii_ok(sc, alloc_opt_info(sc), s_func, car_x)))
+            {
+              opc->v[O_WRAP].fi = opc->v[0].fi;
+              opc->v[0].fp = i_to_p;
+              return_true(sc, car_x);
+            }
+          sc->pc = pstart;
+        }}
   return((p_ppi_ok(sc, opc, s_func, car_x)) ||
-	 (p_ppp_ok(sc, opc, s_func, car_x)) ||
-	 (p_call_ppp_ok(sc, opc, s_func, car_x)));
+         (p_ppp_ok(sc, opc, s_func, car_x)) ||
+         (p_call_ppp_ok(sc, opc, s_func, car_x)));
 }
 
 static bool p_4x_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer car_x, int32_t pstart, s7_pointer expr)
@@ -67877,7 +67877,7 @@ static bool p_4x_ok(s7_scheme *sc, opt_info *opc, s7_pointer s_func, s7_pointer
       if (!is_symbol(cadr(car_x))) return_false(sc, car_x);
       obj = lookup_unexamined(sc, cadr(car_x)); /* was lookup_from (to avoid the unbound variable check) */
       if ((!obj) || (!is_any_vector(obj)) || (vector_rank(obj) != 3))
-	return_false(sc, car_x);
+        return_false(sc, car_x);
     }
   return(p_call_any_ok(sc, opc, s_func, car_x, len));
 }
@@ -67909,8 +67909,8 @@ static bool cell_optimize_1(s7_scheme *sc, s7_pointer expr)
   if (is_symbol(head))
     {
       if ((is_syntactic_symbol(head)) ||
-	  (is_syntactic_pair(car_x))) /* this can be wrong! */
-	return(p_syntax(sc, car_x, len));
+          (is_syntactic_pair(car_x))) /* this can be wrong! */
+        return(p_syntax(sc, car_x, len));
 
       s_slot = s7_slot(sc, head);
       if (!is_slot(s_slot)) return_false(sc, car_x);
@@ -67921,76 +67921,76 @@ static bool cell_optimize_1(s7_scheme *sc, s7_pointer expr)
       s_func = head;
     else
       { /* ((let-ref L 'mult) 1 2) or 'a etc */
-	/* fprintf(stderr, "%d: car_x: %s, head: %s\n", __LINE__, display(car_x), display(head)); */
-	if ((head == sc->quote_function) &&
-	    ((is_pair(cdr(car_x))) && (is_null(cddr(car_x)))))
-	  return(opt_cell_quote(sc, car_x));
-
-	/* if head is ([let-ref] L 'multiply), it should be accessible now, so we could do the lookup, set up s_func and go on */
-	if (is_pair(head))
-	  {
-	    s7_pointer let, slot, sym;
-	    if ((car(head) == sc->let_ref_symbol) && (s7_list_length(sc, head) == 3))
-	      {
-		let = cadr(head);
-		sym = caddr(head);
-	      }
-	    else
-	      if (s7_list_length(sc, head) == 2)
-		{
-		  let = car(head);
-		  sym = cadr(head);
-		}
-	      else return_false(sc, car_x);
-	    if ((is_symbol(let)) && ((is_symbol_and_keyword(sym)) || (is_quoted_symbol(sym))))
-	      {
-		slot = s7_slot(sc, let);
-		if (!is_slot(slot)) return_false(sc, car_x);
-		let = slot_value(slot);
-		if ((!is_let(let)) || (has_let_ref_fallback(let))) return_false(sc, car_x);
-		sym = (is_pair(sym)) ? cadr(sym) : keyword_symbol(sym);
-		s_func = let_ref_p_pp(sc, let, sym);
-	      }
-	    else return_false(sc, car_x);
-	  }
-	else return_false(sc, car_x);
+        /* fprintf(stderr, "%d: car_x: %s, head: %s\n", __LINE__, display(car_x), display(head)); */
+        if ((head == sc->quote_function) &&
+            ((is_pair(cdr(car_x))) && (is_null(cddr(car_x)))))
+          return(opt_cell_quote(sc, car_x));
+
+        /* if head is ([let-ref] L 'multiply), it should be accessible now, so we could do the lookup, set up s_func and go on */
+        if (is_pair(head))
+          {
+            s7_pointer let, slot, sym;
+            if ((car(head) == sc->let_ref_symbol) && (s7_list_length(sc, head) == 3))
+              {
+                let = cadr(head);
+                sym = caddr(head);
+              }
+            else
+              if (s7_list_length(sc, head) == 2)
+                {
+                  let = car(head);
+                  sym = cadr(head);
+                }
+              else return_false(sc, car_x);
+            if ((is_symbol(let)) && ((is_symbol_and_keyword(sym)) || (is_quoted_symbol(sym))))
+              {
+                slot = s7_slot(sc, let);
+                if (!is_slot(slot)) return_false(sc, car_x);
+                let = slot_value(slot);
+                if ((!is_let(let)) || (has_let_ref_fallback(let))) return_false(sc, car_x);
+                sym = (is_pair(sym)) ? cadr(sym) : keyword_symbol(sym);
+                s_func = let_ref_p_pp(sc, let, sym);
+              }
+            else return_false(sc, car_x);
+          }
+        else return_false(sc, car_x);
       }
   if (is_c_function(s_func))
     {
       opt_info *opc = alloc_opt_info(sc);
       switch (len)
-	{
-	case 1: return(p_ok(sc, opc, s_func, car_x));
+        {
+        case 1: return(p_ok(sc, opc, s_func, car_x));
 
-	case 2: return((p_i_ok(sc, opc, s_func, car_x, sc->pc)) ||
-		       (p_d_ok(sc, opc, s_func, car_x, sc->pc)) ||
-		       (p_p_ok(sc, opc, s_func, car_x)));
+        case 2: return((p_i_ok(sc, opc, s_func, car_x, sc->pc)) ||
+                       (p_d_ok(sc, opc, s_func, car_x, sc->pc)) ||
+                       (p_p_ok(sc, opc, s_func, car_x)));
 
-	case 3: return(p_2x_ok(sc, opc, s_func, car_x, sc->pc, expr));
-	case 4: return(p_3x_ok(sc, opc, s_func, car_x, sc->pc, expr));
-	case 5: return(p_4x_ok(sc, opc, s_func, car_x, sc->pc, expr));
+        case 3: return(p_2x_ok(sc, opc, s_func, car_x, sc->pc, expr));
+        case 4: return(p_3x_ok(sc, opc, s_func, car_x, sc->pc, expr));
+        case 5: return(p_4x_ok(sc, opc, s_func, car_x, sc->pc, expr));
 
-	case 6: if (p_5x_ok(sc, opc, s_func, car_x, sc->pc, expr)) return_true(sc, car_x);
-	  /* fall through */
+        case 6: if (p_5x_ok(sc, opc, s_func, car_x, sc->pc, expr)) return_true(sc, car_x);
+          /* fall through */
 
-	default: return(p_call_any_ok(sc, opc, s_func, car_x, len)); /* >3D vector-set etc */
-	}}
+        default: return(p_call_any_ok(sc, opc, s_func, car_x, len)); /* >3D vector-set etc */
+        }}
   else
     {
       if (is_closure(s_func))
-	{
-	  opt_info *opc = alloc_opt_info(sc);
-	  if (p_fx_any_ok(sc, opc, expr))
-	    return_true(sc, car_x);
-	}
+        {
+          opt_info *opc = alloc_opt_info(sc);
+          if (p_fx_any_ok(sc, opc, expr))
+            return_true(sc, car_x);
+        }
       if (is_macro(s_func))
-	return_false(sc, car_x); /* macroexpand+cell_optimize here restarts the optimize process */
+        return_false(sc, car_x); /* macroexpand+cell_optimize here restarts the optimize process */
       if (!s_slot) return_false(sc, car_x);
 #if OPT_PRINT
       {
-	bool res = p_implicit_ok(sc, s_slot, car_x, len);
-	if (!res) fprintf(stderr, "   %sno p_implicit for %s%s\n", bold_text red_text, display(car_x), unbold_text uncolor_text);
-	return(res);
+        bool res = p_implicit_ok(sc, s_slot, car_x, len);
+        if (!res) fprintf(stderr, "   %sno p_implicit for %s%s\n", bold_text red_text, display(car_x), unbold_text uncolor_text);
+        return(res);
       }
 #else
       return(p_implicit_ok(sc, s_slot, car_x, len));
@@ -68013,14 +68013,14 @@ static bool bool_optimize_nw_1(s7_scheme *sc, s7_pointer expr)
   if (is_symbol(head))
     {
       if ((is_syntactic_symbol(head)) ||
-	  (is_syntactic_pair(car_x)))
-	{
-	  if (head == sc->and_symbol)
-	    return(opt_b_and(sc, car_x, len));
-	  if (head == sc->or_symbol)
-	    return(opt_b_or(sc, car_x, len));
-	  return_false(sc, car_x);
-	}
+          (is_syntactic_pair(car_x)))
+        {
+          if (head == sc->and_symbol)
+            return(opt_b_and(sc, car_x, len));
+          if (head == sc->or_symbol)
+            return(opt_b_or(sc, car_x, len));
+          return_false(sc, car_x);
+        }
       s_func = lookup_unexamined(sc, head);
     }
   else
@@ -68032,52 +68032,52 @@ static bool bool_optimize_nw_1(s7_scheme *sc, s7_pointer expr)
   if (is_c_function(s_func))
     {
       if ((is_symbol(head)) && (symbol_id(head) != 0))  /* (float-vector? (block)) -- both safe c_funcs, but this is a method invocation */
-	return_false(sc, car_x);
+        return_false(sc, car_x);
       switch (len)
-	{
-	case 2:
-	  return(b_idp_ok(sc, s_func, car_x, opt_arg_type(sc, cdr(car_x))));
-
-	case 3:
-	  {
-	    s7_pointer arg1 = cadr(car_x), arg2 = caddr(car_x);
-	    s7_pointer sig1 = opt_arg_type(sc, cdr(car_x));
-	    s7_pointer sig2 = opt_arg_type(sc, cddr(car_x));
-	    opt_info *opc = alloc_opt_info(sc);
-	    int32_t cur_index = sc->pc;
-	    s7_b_7pp_t bpf7 = NULL;
-	    s7_b_pp_t bpf;
-
-	    if ((sig2 == sc->is_integer_symbol) || (sig2 == sc->is_byte_symbol))
-	      {
-		if (((sig1 == sc->is_integer_symbol) || (sig1 == sc->is_byte_symbol)) &&
-		    (b_ii_ok(sc, opc, s_func, car_x, arg1, arg2)))
-		  return_true(sc, car_x);
-		sc->pc = cur_index;
-		if (b_pi_ok(sc, opc, s_func, car_x, arg2))
-		  return_true(sc, car_x);
-		sc->pc = cur_index;
-	      }
-
-	    if ((sig1 == sc->is_float_symbol) &&
-		(sig2 == sc->is_float_symbol) &&
-		(b_dd_ok(sc, opc, s_func, car_x, arg1, arg2)))
-	      return_true(sc, car_x);
-	    sc->pc = cur_index;
-
-	    bpf = s7_b_pp_function(s_func);
-	    if (!bpf) bpf7 = s7_b_7pp_function(s_func);
-	    if ((bpf) || (bpf7))
-	      {
-		if (bpf)
-		  opc->v[3].b_pp_f = bpf;
-		else opc->v[3].b_7pp_f = bpf7;
-		return(b_pp_ok(sc, opc, s_func, car_x, arg1, arg2, bpf));
-	      }}
-	  break;
-
-	default: break;
-	}}
+        {
+        case 2:
+          return(b_idp_ok(sc, s_func, car_x, opt_arg_type(sc, cdr(car_x))));
+
+        case 3:
+          {
+            s7_pointer arg1 = cadr(car_x), arg2 = caddr(car_x);
+            s7_pointer sig1 = opt_arg_type(sc, cdr(car_x));
+            s7_pointer sig2 = opt_arg_type(sc, cddr(car_x));
+            opt_info *opc = alloc_opt_info(sc);
+            int32_t cur_index = sc->pc;
+            s7_b_7pp_t bpf7 = NULL;
+            s7_b_pp_t bpf;
+
+            if ((sig2 == sc->is_integer_symbol) || (sig2 == sc->is_byte_symbol))
+              {
+                if (((sig1 == sc->is_integer_symbol) || (sig1 == sc->is_byte_symbol)) &&
+                    (b_ii_ok(sc, opc, s_func, car_x, arg1, arg2)))
+                  return_true(sc, car_x);
+                sc->pc = cur_index;
+                if (b_pi_ok(sc, opc, s_func, car_x, arg2))
+                  return_true(sc, car_x);
+                sc->pc = cur_index;
+              }
+
+            if ((sig1 == sc->is_float_symbol) &&
+                (sig2 == sc->is_float_symbol) &&
+                (b_dd_ok(sc, opc, s_func, car_x, arg1, arg2)))
+              return_true(sc, car_x);
+            sc->pc = cur_index;
+
+            bpf = s7_b_pp_function(s_func);
+            if (!bpf) bpf7 = s7_b_7pp_function(s_func);
+            if ((bpf) || (bpf7))
+              {
+                if (bpf)
+                  opc->v[3].b_pp_f = bpf;
+                else opc->v[3].b_7pp_f = bpf7;
+                return(b_pp_ok(sc, opc, s_func, car_x, arg1, arg2, bpf));
+              }}
+          break;
+
+        default: break;
+        }}
   return_false(sc, car_x);
 }
 
@@ -68129,21 +68129,21 @@ static s7_pfunc s7_optimize_1(s7_scheme *sc, s7_pointer expr, bool nv)
   if (!no_int_opt(expr))
     {
       if (int_optimize(sc, expr))
-	return_success(sc, (nv) ? opt_int_any_nv : opt_make_int, expr);
+        return_success(sc, (nv) ? opt_int_any_nv : opt_make_int, expr);
       sc->pc = 0;
       set_no_int_opt(expr);
     }
   if (!no_float_opt(expr))
     {
       if (float_optimize(sc, expr))
-	return_success(sc, (nv) ? opt_float_any_nv : opt_make_float, expr);
+        return_success(sc, (nv) ? opt_float_any_nv : opt_make_float, expr);
       sc->pc = 0;
       set_no_float_opt(expr);
     }
   if (!no_bool_opt(expr))
     {
       if (bool_optimize_nw(sc, expr))
-	return_success(sc, (nv) ? opt_bool_any_nv : opt_wrap_bool, expr);
+        return_success(sc, (nv) ? opt_bool_any_nv : opt_wrap_bool, expr);
       sc->pc = 0;
       set_no_bool_opt(expr);
     }
@@ -68186,10 +68186,10 @@ static void fx_curlet_tree(s7_scheme *sc, s7_pointer code)
 
   more_vars = (tis_slot(slot3)) && (tis_slot(next_slot(slot3)));
   fx_tree(sc, code,
-	  slot_symbol(slot1),
-	  (tis_slot(slot2)) ? slot_symbol(slot2) : NULL,
-	  (tis_slot(slot3)) ? slot_symbol(slot3) : NULL,
-	  more_vars);
+          slot_symbol(slot1),
+          (tis_slot(slot2)) ? slot_symbol(slot2) : NULL,
+          (tis_slot(slot3)) ? slot_symbol(slot3) : NULL,
+          more_vars);
 
   outer_e = let_outlet(sc->curlet);
   if ((!more_vars) &&
@@ -68202,10 +68202,10 @@ static void fx_curlet_tree(s7_scheme *sc, s7_pointer code)
       slot2 = next_slot(slot1);
       slot3 = (tis_slot(slot2)) ? next_slot(slot2) : NULL;
       fx_tree_outer(sc, code,
-		    slot_symbol(slot1),
-		    (tis_slot(slot2)) ? slot_symbol(slot2) : NULL,
-		    (tis_slot(slot3)) ? slot_symbol(slot3) : NULL,
-		    (tis_slot(slot3)) && (tis_slot(next_slot(slot3))));
+                    slot_symbol(slot1),
+                    (tis_slot(slot2)) ? slot_symbol(slot2) : NULL,
+                    (tis_slot(slot3)) ? slot_symbol(slot3) : NULL,
+                    (tis_slot(slot3)) && (tis_slot(next_slot(slot3))));
     }
 }
 
@@ -68215,10 +68215,10 @@ static void fx_curlet_tree_in(s7_scheme *sc, s7_pointer code)
   s7_pointer slot2 = next_slot(slot1);
   if (tis_slot(slot2)) slot3 = next_slot(slot2);
   fx_tree_in(sc, code,
-	  slot_symbol(slot1),
-	  (tis_slot(slot2)) ? slot_symbol(slot2) : NULL,
-	  (tis_slot(slot3)) ? slot_symbol(slot3) : NULL,
-	  (tis_slot(slot3)) && (tis_slot(next_slot(slot3))));
+          slot_symbol(slot1),
+          (tis_slot(slot2)) ? slot_symbol(slot2) : NULL,
+          (tis_slot(slot3)) ? slot_symbol(slot3) : NULL,
+          (tis_slot(slot3)) && (tis_slot(next_slot(slot3))));
 }
 
 typedef bool (*s7_bfunc)(s7_scheme *sc, s7_pointer expr); /* used in eval */
@@ -68361,11 +68361,11 @@ static s7_pointer make_iterators(s7_scheme *sc, s7_pointer caller, s7_pointer ar
     {
       s7_pointer iter = car(p);
       if (!is_iterator(iter))
-	{
-	  if (!is_mappable(iter))
-	    wrong_type_error_nr(sc, caller, i, iter, a_sequence_string);
-	  iter = s7_make_iterator(sc, iter);
-	}
+        {
+          if (!is_mappable(iter))
+            wrong_type_error_nr(sc, caller, i, iter, a_sequence_string);
+          iter = s7_make_iterator(sc, iter);
+        }
       sc->z = cons(sc, iter, sc->z);
     }
   sc->temp3 = sc->unused;
@@ -68402,165 +68402,165 @@ static s7_pointer g_for_each_closure(s7_scheme *sc, s7_pointer f, s7_pointer seq
       slot = let_slots(sc->curlet);
 
       if (sc->map_call_ctr == 0)
-	{
-	  if (is_null(cdr(body)))
-	    func = s7_optimize_nv(sc, body);
-	  else
-	    if (is_null(cddr(body))) /* 3 sometimes works */
-	      {
-		set_ulist_1(sc, sc->begin_symbol, body);
-		func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), true); /* was list_1 via cons 8-Apr-21, true=nr */
-	      }}
+        {
+          if (is_null(cdr(body)))
+            func = s7_optimize_nv(sc, body);
+          else
+            if (is_null(cddr(body))) /* 3 sometimes works */
+              {
+                set_ulist_1(sc, sc->begin_symbol, body);
+                func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), true); /* was list_1 via cons 8-Apr-21, true=nr */
+              }}
 
       if (func)
-	{
-	  push_stack_no_let(sc, OP_MAP_UNWIND, f, seq);
-	  sc->map_call_ctr++;
-	  if (is_pair(seq))
-	    {
-	      for (s7_pointer x = seq, y = x; is_pair(x); )
-		{
-		  slot_set_value(slot, car(x));
-		  func(sc);
-		  x = cdr(x);
-		  if (is_pair(x))
-		    {
-		      slot_set_value(slot, car(x));
-		      func(sc);
-		      x = cdr(x);
-		      y = cdr(y);
-		      if (x == y) break;
-		    }}
-	      res = sc->unspecified;
-	    }
-	  else
-	    if (is_float_vector(seq))
-	      {
-		s7_double *vals = float_vector_floats(seq);
-		s7_int i, len = vector_length(seq);
-		if ((len > MUTLIM) &&
-		    (!tree_has_setters(sc, body)))
-		  {
-		    s7_pointer sv = wrapped_real(sc); /* make_mutable_real(sc, 0.0) 16-Nov-23 */
-		    slot_set_value(slot, sv);
-		    if (func == opt_float_any_nv)
-		      {
-			opt_info *o = sc->opts[0];
-			s7_double (*fd)(opt_info *o) = o->v[0].fd;
-			for (i = 0; i < len; i++) {set_real(sv, vals[i]); fd(o);}}
-		    else
-		      if (func == opt_cell_any_nv)
-			{
-			  opt_info *o = sc->opts[0];
-			  s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-			  if (fp == opt_unless_p_1)
-			    for (i = 0; i < len; i++) {set_real(sv, vals[i]); if (!(o->v[4].fb(o->v[3].o1))) o->v[5].o1->v[0].fp(o->v[5].o1);}
-			  else for (i = 0; i < len; i++) {set_real(sv, vals[i]); fp(o);}
-			}
-		      else for (i = 0; i < len; i++) {set_real(sv, vals[i]); func(sc);}
-		  }
-		else for (i = 0; i < len; i++) {slot_set_value(slot, make_real(sc, vals[i])); func(sc);}
-		res = sc->unspecified;
-	      }
-	    else
-	      if (is_int_vector(seq))
-		{
-		  s7_int *vals = int_vector_ints(seq);
-		  s7_int i, len = vector_length(seq);
-		  if ((len > MUTLIM) &&
-		      (!tree_has_setters(sc, body)))
-		    {
-		      s7_pointer sv = wrapped_integer(sc); /* make_mutable_integer(sc, 0) */
-		      slot_set_value(slot, sv);
-		      /* since there are no setters, the inner step is also mutable if there is one.
-		       *    func=opt_cell_any_nv, sc->opts[0]->v[0].fp(sc->opts[0]) fp=opt_do_1 -> mutable version
-		       */
-		      if (func == opt_int_any_nv)
-			{
-			  opt_info *o = sc->opts[0];
-			  s7_int (*fi)(opt_info *o) = o->v[0].fi;
-			  for (i = 0; i < len; i++) {set_integer(sv, vals[i]); fi(o);}
-			}
-		      else for (i = 0; i < len; i++) {set_integer(sv, vals[i]); func(sc);}
-		    }
-		  else for (i = 0; i < len; i++) {slot_set_value(slot, make_integer(sc, vals[i])); func(sc);}
-		  res = sc->unspecified;
-		}
-	      else
-		if (is_t_vector(seq))
-		  {
-		    s7_pointer *vals = vector_elements(seq);
-		    s7_int i, len = vector_length(seq);
-		    if (func == opt_cell_any_nv)
-		      {
-			opt_info *o = sc->opts[0];
-			s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-			for (i = 0; i < len; i++) {slot_set_value(slot, vals[i]); fp(o);}}
-		    else for (i = 0; i < len; i++) {slot_set_value(slot, vals[i]); func(sc);}
-		    res = sc->unspecified;
-		  }
-		else
-		  if (is_string(seq))
-		    {
-		      const char *str = string_value(seq);
-		      s7_int len = string_length(seq);
-		      for (s7_int i = 0; i < len; i++) {slot_set_value(slot, chars[(uint8_t)(str[i])]); func(sc);}
-		      res = sc->unspecified;
-		    }
-		  else
-		    if (is_byte_vector(seq))
-		      {
-			const uint8_t *vals = (const uint8_t *)byte_vector_bytes(seq);
-			s7_int i, len = vector_length(seq);
-			if (func == opt_int_any_nv)
-			  {
-			    opt_info *o = sc->opts[0];
-			    s7_int (*fi)(opt_info *o) = o->v[0].fi;
-			    for (i = 0; i < len; i++) {slot_set_value(slot, small_int(vals[i])); fi(o);}}
-			else for (i = 0; i < len; i++) {slot_set_value(slot, small_int(vals[i])); func(sc);}
-			res = sc->unspecified;
-		      }
-	  if (res)
-	    return(clear_for_each(sc));
-	  if (!is_iterator(seq))
-	    {
-	      if (!is_mappable(seq))
-		wrong_type_error_nr(sc, sc->for_each_symbol, 2, seq, a_sequence_string);
-	      seq = s7_make_iterator(sc, seq);
-	      set_stack_protected2_with(sc, seq, OP_MAP_UNWIND); /* GC protect new iterator */
-	    }
-	  /* push_stack_no_let(sc, OP_GC_PROTECT, seq, f); */
-	  if (func == opt_cell_any_nv)
-	    {
-	      opt_info *o = sc->opts[0];
-	      s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-	      while (true)
-		{
-		  slot_set_value(slot, s7_iterate(sc, seq));
-		  if (iterator_is_at_end(seq)) return(clear_for_each(sc));
-		  fp(o);
-		}}
-	  if (func == opt_int_any_nv)
-	    {
-	      opt_info *o = sc->opts[0];
-	      s7_int (*fi)(opt_info *o) = o->v[0].fi;
-	      while (true)
-		{
-		  slot_set_value(slot, s7_iterate(sc, seq));
-		  if (iterator_is_at_end(seq)) return(clear_for_each(sc));
-		  fi(o);
-		}}
-	  while (true)
-	    {
-	      slot_set_value(slot, s7_iterate(sc, seq));
-	      if (iterator_is_at_end(seq)) return(clear_for_each(sc));
-	      func(sc);
-	    }} /* we never get here -- the while loops above exit via return #<unspecified> */
+        {
+          push_stack_no_let(sc, OP_MAP_UNWIND, f, seq);
+          sc->map_call_ctr++;
+          if (is_pair(seq))
+            {
+              for (s7_pointer x = seq, y = x; is_pair(x); )
+                {
+                  slot_set_value(slot, car(x));
+                  func(sc);
+                  x = cdr(x);
+                  if (is_pair(x))
+                    {
+                      slot_set_value(slot, car(x));
+                      func(sc);
+                      x = cdr(x);
+                      y = cdr(y);
+                      if (x == y) break;
+                    }}
+              res = sc->unspecified;
+            }
+          else
+            if (is_float_vector(seq))
+              {
+                s7_double *vals = float_vector_floats(seq);
+                s7_int i, len = vector_length(seq);
+                if ((len > MUTLIM) &&
+                    (!tree_has_setters(sc, body)))
+                  {
+                    s7_pointer sv = wrapped_real(sc); /* make_mutable_real(sc, 0.0) 16-Nov-23 */
+                    slot_set_value(slot, sv);
+                    if (func == opt_float_any_nv)
+                      {
+                        opt_info *o = sc->opts[0];
+                        s7_double (*fd)(opt_info *o) = o->v[0].fd;
+                        for (i = 0; i < len; i++) {set_real(sv, vals[i]); fd(o);}}
+                    else
+                      if (func == opt_cell_any_nv)
+                        {
+                          opt_info *o = sc->opts[0];
+                          s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+                          if (fp == opt_unless_p_1)
+                            for (i = 0; i < len; i++) {set_real(sv, vals[i]); if (!(o->v[4].fb(o->v[3].o1))) o->v[5].o1->v[0].fp(o->v[5].o1);}
+                          else for (i = 0; i < len; i++) {set_real(sv, vals[i]); fp(o);}
+                        }
+                      else for (i = 0; i < len; i++) {set_real(sv, vals[i]); func(sc);}
+                  }
+                else for (i = 0; i < len; i++) {slot_set_value(slot, make_real(sc, vals[i])); func(sc);}
+                res = sc->unspecified;
+              }
+            else
+              if (is_int_vector(seq))
+                {
+                  s7_int *vals = int_vector_ints(seq);
+                  s7_int i, len = vector_length(seq);
+                  if ((len > MUTLIM) &&
+                      (!tree_has_setters(sc, body)))
+                    {
+                      s7_pointer sv = wrapped_integer(sc); /* make_mutable_integer(sc, 0) */
+                      slot_set_value(slot, sv);
+                      /* since there are no setters, the inner step is also mutable if there is one.
+                       *    func=opt_cell_any_nv, sc->opts[0]->v[0].fp(sc->opts[0]) fp=opt_do_1 -> mutable version
+                       */
+                      if (func == opt_int_any_nv)
+                        {
+                          opt_info *o = sc->opts[0];
+                          s7_int (*fi)(opt_info *o) = o->v[0].fi;
+                          for (i = 0; i < len; i++) {set_integer(sv, vals[i]); fi(o);}
+                        }
+                      else for (i = 0; i < len; i++) {set_integer(sv, vals[i]); func(sc);}
+                    }
+                  else for (i = 0; i < len; i++) {slot_set_value(slot, make_integer(sc, vals[i])); func(sc);}
+                  res = sc->unspecified;
+                }
+              else
+                if (is_t_vector(seq))
+                  {
+                    s7_pointer *vals = vector_elements(seq);
+                    s7_int i, len = vector_length(seq);
+                    if (func == opt_cell_any_nv)
+                      {
+                        opt_info *o = sc->opts[0];
+                        s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+                        for (i = 0; i < len; i++) {slot_set_value(slot, vals[i]); fp(o);}}
+                    else for (i = 0; i < len; i++) {slot_set_value(slot, vals[i]); func(sc);}
+                    res = sc->unspecified;
+                  }
+                else
+                  if (is_string(seq))
+                    {
+                      const char *str = string_value(seq);
+                      s7_int len = string_length(seq);
+                      for (s7_int i = 0; i < len; i++) {slot_set_value(slot, chars[(uint8_t)(str[i])]); func(sc);}
+                      res = sc->unspecified;
+                    }
+                  else
+                    if (is_byte_vector(seq))
+                      {
+                        const uint8_t *vals = (const uint8_t *)byte_vector_bytes(seq);
+                        s7_int i, len = vector_length(seq);
+                        if (func == opt_int_any_nv)
+                          {
+                            opt_info *o = sc->opts[0];
+                            s7_int (*fi)(opt_info *o) = o->v[0].fi;
+                            for (i = 0; i < len; i++) {slot_set_value(slot, small_int(vals[i])); fi(o);}}
+                        else for (i = 0; i < len; i++) {slot_set_value(slot, small_int(vals[i])); func(sc);}
+                        res = sc->unspecified;
+                      }
+          if (res)
+            return(clear_for_each(sc));
+          if (!is_iterator(seq))
+            {
+              if (!is_mappable(seq))
+                wrong_type_error_nr(sc, sc->for_each_symbol, 2, seq, a_sequence_string);
+              seq = s7_make_iterator(sc, seq);
+              set_stack_protected2_with(sc, seq, OP_MAP_UNWIND); /* GC protect new iterator */
+            }
+          /* push_stack_no_let(sc, OP_GC_PROTECT, seq, f); */
+          if (func == opt_cell_any_nv)
+            {
+              opt_info *o = sc->opts[0];
+              s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+              while (true)
+                {
+                  slot_set_value(slot, s7_iterate(sc, seq));
+                  if (iterator_is_at_end(seq)) return(clear_for_each(sc));
+                  fp(o);
+                }}
+          if (func == opt_int_any_nv)
+            {
+              opt_info *o = sc->opts[0];
+              s7_int (*fi)(opt_info *o) = o->v[0].fi;
+              while (true)
+                {
+                  slot_set_value(slot, s7_iterate(sc, seq));
+                  if (iterator_is_at_end(seq)) return(clear_for_each(sc));
+                  fi(o);
+                }}
+          while (true)
+            {
+              slot_set_value(slot, s7_iterate(sc, seq));
+              if (iterator_is_at_end(seq)) return(clear_for_each(sc));
+              func(sc);
+            }} /* we never get here -- the while loops above exit via return #<unspecified> */
       else /* not func -- unneeded "else" but otherwise confusing code */
-	{
-	  set_no_cell_opt(body);
-	  set_curlet(sc, old_e);
-	}}
+        {
+          set_no_cell_opt(body);
+          set_curlet(sc, old_e);
+        }}
   if ((!is_closure_star(f)) && /* for simplicity in op_for_each_2 (otherwise we need to check for default arg) */
       (is_null(cdr(body))) &&
       (is_pair(seq)))
@@ -68574,7 +68574,7 @@ static s7_pointer g_for_each_closure(s7_scheme *sc, s7_pointer f, s7_pointer seq
   if (!is_iterator(seq))
     {
       if (!is_mappable(seq))
-	wrong_type_error_nr(sc, sc->for_each_symbol, 2, seq, a_sequence_string);
+        wrong_type_error_nr(sc, sc->for_each_symbol, 2, seq, a_sequence_string);
       sc->z = s7_make_iterator(sc, seq);
     }
   else sc->z = seq;
@@ -68591,29 +68591,29 @@ static void map_or_for_each_closure_pair_2(s7_scheme *sc, s7_pfunc func, s7_poin
       slot_set_value(slot1, car(fast1));
       slot_set_value(slot2, car(fast2));
       if (for_each_case)
-	func(sc);
+        func(sc);
       else
-	{
-	  s7_pointer val = func(sc);
-	  if (val != sc->no_value)
-	    set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND); /* see map_closure_2 below -- stack_protected3 is our temp */
-	}
+        {
+          s7_pointer val = func(sc);
+          if (val != sc->no_value)
+            set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND); /* see map_closure_2 below -- stack_protected3 is our temp */
+        }
       if ((is_pair(cdr(fast1))) && (is_pair(cdr(fast2))))
-	{
-	  fast1 = cdr(fast1);
-	  if (fast1 == slow1) break;
-	  fast2 = cdr(fast2);
-	  if (fast2 == slow2) break;
-	  slot_set_value(slot1, car(fast1));
-	  slot_set_value(slot2, car(fast2));
-	  if (for_each_case)
-	    func(sc);
-	  else
-	    {
-	      s7_pointer val = func(sc);
-	      if (val != sc->no_value)
-		set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND);
-	    }}}
+        {
+          fast1 = cdr(fast1);
+          if (fast1 == slow1) break;
+          fast2 = cdr(fast2);
+          if (fast2 == slow2) break;
+          slot_set_value(slot1, car(fast1));
+          slot_set_value(slot2, car(fast2));
+          if (for_each_case)
+            func(sc);
+          else
+            {
+              s7_pointer val = func(sc);
+              if (val != sc->no_value)
+                set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND);
+            }}}
 }
 
 static void map_or_for_each_closure_vector_2(s7_scheme *sc, s7_pfunc func, s7_pointer seq1, s7_pointer seq2, s7_pointer slot1, s7_pointer slot2, bool for_each_case)
@@ -68625,13 +68625,13 @@ static void map_or_for_each_closure_vector_2(s7_scheme *sc, s7_pfunc func, s7_po
       slot_set_value(slot1, vector_getter(seq1)(sc, seq1, i));
       slot_set_value(slot2, vector_getter(seq2)(sc, seq2, i));
       if (for_each_case)
-	func(sc);
+        func(sc);
       else
-	{
-	  s7_pointer val = func(sc);
-	  if (val != sc->no_value)
-	    set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND);
-	}}
+        {
+          s7_pointer val = func(sc);
+          if (val != sc->no_value)
+            set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND);
+        }}
 }
 
 static void map_or_for_each_closure_string_2(s7_scheme *sc, s7_pfunc func, s7_pointer seq1, s7_pointer seq2, s7_pointer slot1, s7_pointer slot2, bool for_each_case)
@@ -68644,13 +68644,13 @@ static void map_or_for_each_closure_string_2(s7_scheme *sc, s7_pfunc func, s7_po
       slot_set_value(slot1, chars[(uint8_t)(s1[i])]);
       slot_set_value(slot2, chars[(uint8_t)(s2[i])]);
       if (for_each_case)
-	func(sc);
+        func(sc);
       else
-	{
-	  s7_pointer val = func(sc);
-	  if (val != sc->no_value)
-	    set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND);
-	}}
+        {
+          s7_pointer val = func(sc);
+          if (val != sc->no_value)
+            set_stack_protected3_with(sc, cons(sc, val, stack_protected3(sc)), OP_MAP_UNWIND);
+        }}
 }
 
 static s7_pointer g_for_each_closure_2(s7_scheme *sc, s7_pointer f, s7_pointer seq1, s7_pointer seq2)
@@ -68663,67 +68663,67 @@ static s7_pointer g_for_each_closure_2(s7_scheme *sc, s7_pointer f, s7_pointer s
       s7_pointer val1 = seq_init(sc, seq1);
       s7_pointer val2 = seq_init(sc, seq2);
       set_curlet(sc, make_let_with_two_slots(sc, closure_let(f),
-					    (is_pair(car(pars))) ? caar(pars) : car(pars), val1,
-					    (is_pair(cadr(pars))) ? cadar(pars) : cadr(pars), val2));
+                                            (is_pair(car(pars))) ? caar(pars) : car(pars), val1,
+                                            (is_pair(cadr(pars))) ? cadar(pars) : cadr(pars), val2));
       slot1 = let_slots(sc->curlet);
       slot2 = next_slot(slot1);
 
       if (sc->map_call_ctr == 0)
-	{
-	  if (is_null(cdr(body)))
-	    func = s7_optimize_nv(sc, body);
-	  else
-	    if (is_null(cddr(body)))
-	      {
-		set_ulist_1(sc, sc->begin_symbol, body);
-		func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), true);
-	      }}
+        {
+          if (is_null(cdr(body)))
+            func = s7_optimize_nv(sc, body);
+          else
+            if (is_null(cddr(body)))
+              {
+                set_ulist_1(sc, sc->begin_symbol, body);
+                func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), true);
+              }}
 
       if (func)
-	{
-	  s7_pointer res = NULL;
-	  push_stack_no_let(sc, OP_MAP_UNWIND, f, seq1);
-	  sc->map_call_ctr++;
-	  if ((is_pair(seq1)) && (is_pair(seq2)))
-	    {
-	      map_or_for_each_closure_pair_2(sc, func, seq1, seq2, slot1, slot2, true);
-	      res = sc->unspecified;
-	    }
-	  else
-	    if ((is_any_vector(seq1)) && (is_any_vector(seq2)))
-	      {
-		map_or_for_each_closure_vector_2(sc, func, seq1, seq2, slot1, slot2, true);
-		res = sc->unspecified;
-	      }
-	    else
-	      if ((is_string(seq1)) && (is_string(seq2)))
-		{
-		  map_or_for_each_closure_string_2(sc, func, seq1, seq2, slot1, slot2, true);
-		  res = sc->unspecified;
-		}
-	  sc->map_call_ctr--;
-	  unstack_with(sc, OP_MAP_UNWIND);
-	  set_curlet(sc, olde);
-	  if (res) return(res);
-	  set_no_cell_opt(body);
-	}
+        {
+          s7_pointer res = NULL;
+          push_stack_no_let(sc, OP_MAP_UNWIND, f, seq1);
+          sc->map_call_ctr++;
+          if ((is_pair(seq1)) && (is_pair(seq2)))
+            {
+              map_or_for_each_closure_pair_2(sc, func, seq1, seq2, slot1, slot2, true);
+              res = sc->unspecified;
+            }
+          else
+            if ((is_any_vector(seq1)) && (is_any_vector(seq2)))
+              {
+                map_or_for_each_closure_vector_2(sc, func, seq1, seq2, slot1, slot2, true);
+                res = sc->unspecified;
+              }
+            else
+              if ((is_string(seq1)) && (is_string(seq2)))
+                {
+                  map_or_for_each_closure_string_2(sc, func, seq1, seq2, slot1, slot2, true);
+                  res = sc->unspecified;
+                }
+          sc->map_call_ctr--;
+          unstack_with(sc, OP_MAP_UNWIND);
+          set_curlet(sc, olde);
+          if (res) return(res);
+          set_no_cell_opt(body);
+        }
       else /* not func */
-	{
-	  set_no_cell_opt(body);
-	  set_curlet(sc, olde);
-	}}
+        {
+          set_no_cell_opt(body);
+          set_curlet(sc, olde);
+        }}
 
   if (!is_iterator(seq1))
     {
       if (!is_mappable(seq1))
-	wrong_type_error_nr(sc, sc->for_each_symbol, 2, seq1, a_sequence_string);
+        wrong_type_error_nr(sc, sc->for_each_symbol, 2, seq1, a_sequence_string);
       sc->z = s7_make_iterator(sc, seq1);
     }
   else sc->z = seq1;
   if (!is_iterator(seq2))
     {
       if (!is_mappable(seq2))
-	wrong_type_error_nr(sc, sc->for_each_symbol, 3, seq2, a_sequence_string);
+        wrong_type_error_nr(sc, sc->for_each_symbol, 3, seq2, a_sequence_string);
       sc->z = list_2(sc, sc->z, s7_make_iterator(sc, seq2));
     }
   else sc->z = list_2(sc, sc->z, seq2);
@@ -68740,11 +68740,11 @@ static inline bool for_each_arg_is_null(s7_scheme *sc, s7_pointer args)
     {
       s7_pointer obj = car(p);
       if (!is_mappable(obj))
-	{
-	  if (is_null(obj))
-	    got_nil = true;
-	  else wrong_type_error_nr(sc, sc->for_each_symbol, i, obj, a_sequence_string);
-	}}
+        {
+          if (is_null(obj))
+            got_nil = true;
+          else wrong_type_error_nr(sc, sc->for_each_symbol, i, obj, a_sequence_string);
+        }}
   return(got_nil);
 }
 
@@ -68763,21 +68763,21 @@ Each object can be a list, string, vector, hash-table, or any other sequence."
   if (is_closure(f))                            /* not lambda* that might get confused about arg names */
     {
       if ((len == 1) &&
-	  (is_pair(closure_args(f))) &&
-	  (is_null(cdr(closure_args(f)))))
-	arity_ok = true;
+          (is_pair(closure_args(f))) &&
+          (is_null(cdr(closure_args(f)))))
+        arity_ok = true;
     }
   else
     if (is_c_object(f)) /* see note in g_map; s7_is_aritable can clobber sc->args=plist=args */
       args = copy_proper_list(sc, args);
     else
       if (!is_applicable(f))
-	return(method_or_bust(sc, f, sc->for_each_symbol, args, something_applicable_string, 1));
+        return(method_or_bust(sc, f, sc->for_each_symbol, args, something_applicable_string, 1));
 
   if ((!arity_ok) &&
       (!s7_is_aritable(sc, f, len)))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "for-each first argument ~A called with ~D argument~P?", 53), f, wrap_integer(sc, len), wrap_integer(sc, len)));
+             set_elist_4(sc, wrap_string(sc, "for-each first argument ~A called with ~D argument~P?", 53), f, wrap_integer(sc, len), wrap_integer(sc, len)));
 
   if (for_each_arg_is_null(sc, cdr(args))) return(sc->unspecified);
 
@@ -68789,100 +68789,100 @@ Each object can be a list, string, vector, hash-table, or any other sequence."
 
       s7_p_p_t fp = s7_p_p_function(f);
       if ((fp) && (len == 1))
-	{
-	  if (is_pair(cadr(args)))
-	    {
-	      for (s7_pointer fast = cadr(args), slow = cadr(args); is_pair(fast); fast = cdr(fast), slow = cdr(slow))
-		{
-		  fp(sc, car(fast));
-		  if (is_pair(cdr(fast)))
-		    {
-		      fast = cdr(fast);
-		      if (fast == slow) break;
-		      fp(sc, car(fast));
-		    }}
-	      return(sc->unspecified);
-	    }
-	  if (is_any_vector(cadr(args)))
-	    {
-	      s7_pointer v = cadr(args);
-	      s7_int vlen = vector_length(v);
-	      if (is_float_vector(v))
-		{
-		  s7_pointer rl = wrapped_real(sc); /* make_mutable_real(sc, 0.0) */
-		  sc->temp7 = rl;
-		  for (s7_int i = 0; i < vlen; i++)
-		    {
-		      set_real(rl, float_vector(v, i));
-		      fp(sc, rl);
-		    }}
-	      else
-		if (is_int_vector(v))
-		  {
-		    s7_pointer iv = wrapped_integer(sc); /* make_mutable_integer(sc, 0) */
-		    sc->temp7 = iv;
-		    for (s7_int i = 0; i < vlen; i++)
-		      {
-			set_integer(iv, int_vector(v, i));
-			fp(sc, iv);
-		      }}
-		else
-		  for (s7_int i = 0; i < vlen; i++)
-		    fp(sc, vector_getter(v)(sc, v, i)); /* LOOP_4 here gains almost nothing */
-	      return(sc->unspecified);
-	    }
-	  if (is_string(cadr(args)))
-	    {
-	      s7_pointer str = cadr(args);
-	      const char *s = string_value(str);
-	      s7_int slen = string_length(str);
-	      for (s7_int i = 0; i < slen; i++) fp(sc, chars[(uint8_t)(s[i])]);
-	      return(sc->unspecified);
-	    }}
+        {
+          if (is_pair(cadr(args)))
+            {
+              for (s7_pointer fast = cadr(args), slow = cadr(args); is_pair(fast); fast = cdr(fast), slow = cdr(slow))
+                {
+                  fp(sc, car(fast));
+                  if (is_pair(cdr(fast)))
+                    {
+                      fast = cdr(fast);
+                      if (fast == slow) break;
+                      fp(sc, car(fast));
+                    }}
+              return(sc->unspecified);
+            }
+          if (is_any_vector(cadr(args)))
+            {
+              s7_pointer v = cadr(args);
+              s7_int vlen = vector_length(v);
+              if (is_float_vector(v))
+                {
+                  s7_pointer rl = wrapped_real(sc); /* make_mutable_real(sc, 0.0) */
+                  sc->temp7 = rl;
+                  for (s7_int i = 0; i < vlen; i++)
+                    {
+                      set_real(rl, float_vector(v, i));
+                      fp(sc, rl);
+                    }}
+              else
+                if (is_int_vector(v))
+                  {
+                    s7_pointer iv = wrapped_integer(sc); /* make_mutable_integer(sc, 0) */
+                    sc->temp7 = iv;
+                    for (s7_int i = 0; i < vlen; i++)
+                      {
+                        set_integer(iv, int_vector(v, i));
+                        fp(sc, iv);
+                      }}
+                else
+                  for (s7_int i = 0; i < vlen; i++)
+                    fp(sc, vector_getter(v)(sc, v, i)); /* LOOP_4 here gains almost nothing */
+              return(sc->unspecified);
+            }
+          if (is_string(cadr(args)))
+            {
+              s7_pointer str = cadr(args);
+              const char *s = string_value(str);
+              s7_int slen = string_length(str);
+              for (s7_int i = 0; i < slen; i++) fp(sc, chars[(uint8_t)(s[i])]);
+              return(sc->unspecified);
+            }}
       func = c_function_call(f);    /* presumably this is either display/write, or method call? */
       sc->z = make_iterators(sc, sc->for_each_symbol, args);
       sc->z = cons_unchecked(sc, sc->z, make_list(sc, len, sc->nil));
       push_stack_no_let(sc, OP_GC_PROTECT, sc->args, sc->z); /* temporary GC protection */
       if (len == 1)
-	{
-	  s7_pointer x = caar(sc->z), y = cdr(sc->z);
-	  sc->z = sc->unused;
-	  while (true)
-	    {
-	      set_car(y, s7_iterate(sc, x));
-	      if (iterator_is_at_end(x))
-		{
-		  /* not pop_stack here since that can clobber sc->code et al, and if this for-each call is
-		   *   being treated as safe, fn_proc(for-each) assumes everywhere that sc->code is left alone.
-		   */
-		  unstack_gc_protect(sc);		  /* free_cell(sc, x); */ /* 16-Jan-19 */
-		  return(sc->unspecified);
-		}
-	      func(sc, y);
-	    }}
+        {
+          s7_pointer x = caar(sc->z), y = cdr(sc->z);
+          sc->z = sc->unused;
+          while (true)
+            {
+              set_car(y, s7_iterate(sc, x));
+              if (iterator_is_at_end(x))
+                {
+                  /* not pop_stack here since that can clobber sc->code et al, and if this for-each call is
+                   *   being treated as safe, fn_proc(for-each) assumes everywhere that sc->code is left alone.
+                   */
+                  unstack_gc_protect(sc);                  /* free_cell(sc, x); */ /* 16-Jan-19 */
+                  return(sc->unspecified);
+                }
+              func(sc, y);
+            }}
       iters = sc->z;
       sc->z = sc->unused;
       while (true)
-	{
-	  for (s7_pointer x = car(iters), y = cdr(iters); is_pair(x); x = cdr(x), y = cdr(y))
-	    {
-	      set_car(y, s7_iterate(sc, car(x)));
-	      if (iterator_is_at_end(car(x)))
-		{
-		  unstack_gc_protect(sc);
-		  return(sc->unspecified);
-		}}
-	  func(sc, cdr(iters));
-	}}
+        {
+          for (s7_pointer x = car(iters), y = cdr(iters); is_pair(x); x = cdr(x), y = cdr(y))
+            {
+              set_car(y, s7_iterate(sc, car(x)));
+              if (iterator_is_at_end(car(x)))
+                {
+                  unstack_gc_protect(sc);
+                  return(sc->unspecified);
+                }}
+          func(sc, cdr(iters));
+        }}
 
   /* if closure call is straightforward, use OP_FOR_EACH_1 */
   if ((len == 1) &&
       (((is_closure(f)) &&
-	(closure_arity_to_int(sc, f) == 1) &&
-	(!is_constant_symbol(sc, car(closure_args(f))))) ||
+        (closure_arity_to_int(sc, f) == 1) &&
+        (!is_constant_symbol(sc, car(closure_args(f))))) ||
        ((is_closure_star(f)) &&
-	(closure_star_arity_to_int(sc, f) == 1) &&
-	(!is_constant_symbol(sc, (is_pair(car(closure_args(f)))) ? caar(closure_args(f)) : car(closure_args(f)))))))
+        (closure_star_arity_to_int(sc, f) == 1) &&
+        (!is_constant_symbol(sc, (is_pair(car(closure_args(f)))) ? caar(closure_args(f)) : car(closure_args(f)))))))
     return(g_for_each_closure(sc, f, cadr(args)));
 
   push_stack(sc, OP_FOR_EACH, cons_unchecked(sc, make_iterators(sc, sc->for_each_symbol, args), make_list(sc, len, sc->nil)), f);
@@ -68898,11 +68898,11 @@ static bool op_for_each(s7_scheme *sc)
     {
       set_car(x, s7_iterate(sc, car(y)));
       if (iterator_is_at_end(car(y)))
-	{
-	  sc->value = sc->unspecified;
-	  free_cell(sc, sc->args);
-	  return(true);
-	}}
+        {
+          sc->value = sc->unspecified;
+          free_cell(sc, sc->args);
+          return(true);
+        }}
   push_stack_direct(sc, OP_FOR_EACH);
   sc->args = (needs_copied_args(sc->code)) ? copy_proper_list(sc, saved_args) : saved_args;
   return(false);
@@ -68963,11 +68963,11 @@ static Inline bool inline_op_for_each_2(s7_scheme *sc) /* called once in eval, l
     {
       counter_set_result(c, cdr(counter_result(c)));
       if (counter_result(c) == counter_list(c))
-	{
-	  sc->value = sc->unspecified;
-	  free_cell(sc, c);  /* not sc->args = sc->nil; */
-	  return(true);
-	}
+        {
+          sc->value = sc->unspecified;
+          free_cell(sc, c);  /* not sc->args = sc->nil; */
+          return(true);
+        }
       push_stack_direct(sc, OP_FOR_EACH_2);
     }
   else push_stack_direct(sc, OP_FOR_EACH_3);
@@ -69004,99 +69004,99 @@ static s7_pointer g_map_closure(s7_scheme *sc, s7_pointer f, s7_pointer seq) /*
       slot = let_slots(sc->curlet);
 
       if (sc->map_call_ctr == 0)
-	{
-	  if (is_null(cdr(body)))
-	    func = s7_cell_optimize(sc, body, false);
-	  else
-	    if (is_null(cddr(body)))
-	      {
-		set_ulist_1(sc, sc->begin_symbol, body);
-		func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), false); /* list_1 8-Apr-21 */
-	      }}
+        {
+          if (is_null(cdr(body)))
+            func = s7_cell_optimize(sc, body, false);
+          else
+            if (is_null(cddr(body)))
+              {
+                set_ulist_1(sc, sc->begin_symbol, body);
+                func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), false); /* list_1 8-Apr-21 */
+              }}
       if (func)
-	{
-	  s7_pointer z, res = NULL;
-	  push_stack_no_let(sc, OP_MAP_UNWIND, f, seq);
-	  sc->map_call_ctr++;
-	  if (is_pair(seq))
-	    {
-	      set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-	      for (s7_pointer fast = seq, slow = seq; is_pair(fast); fast = cdr(fast), slow = cdr(slow))
-		{
-		  slot_set_value(slot, car(fast));
-		  z = func(sc);
-		  if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
-		  if (is_pair(cdr(fast)))
-		    {
-		      fast = cdr(fast);
-		      if (fast == slow)	break;
-		      slot_set_value(slot, car(fast));
-		      z = func(sc);
-		      if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
-		    }}
-	      res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-	    }
-	  else
-	    if (is_float_vector(seq))
-	      {
-		s7_double *vals = float_vector_floats(seq);
-		s7_int len = vector_length(seq);
-		set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-		for (s7_int i = 0; i < len; i++)
-		  {
-		    slot_set_value(slot, make_real(sc, vals[i]));
-		    z = func(sc);
-		    if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
-		  }
-		res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-	      }
-	    else
-	      if (is_int_vector(seq))
-		{
-		  s7_int *vals = int_vector_ints(seq);
-		  s7_int len = vector_length(seq);
-		  set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-		  for (s7_int i = 0; i < len; i++)
-		    {
-		      slot_set_value(slot, make_integer(sc, vals[i]));
-		      z = func(sc);
-		      if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
-		    }
-		  res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-		}
-	      else
-		if (is_t_vector(seq))
-		  {
-		    s7_pointer *vals = vector_elements(seq);
-		    s7_int len = vector_length(seq);
-		    set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-		    for (s7_int i = 0; i < len; i++)
-		      {
-			slot_set_value(slot, vals[i]);
-			z = func(sc);
-			if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
-		      }
-		    res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-		  }
-		else
-		  if (is_string(seq))
-		    {
-		      s7_int len = string_length(seq);
-		      const char *str = string_value(seq);
-		      set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-		      for (s7_int i = 0; i < len; i++)
-			{
-			  slot_set_value(slot, chars[(uint8_t)(str[i])]);
-			  z = func(sc);
-			  if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
-			}
-		      res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-		    }
-	  sc->map_call_ctr--;
-	  unstack_with(sc, OP_MAP_UNWIND);
-	  if ((S7_DEBUGGING) && (sc->map_call_ctr < 0)) {fprintf(stderr, "%s[%d]: map ctr: %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr); sc->map_call_ctr = 0;}
-	  if (res) return(res);
-	}
+        {
+          s7_pointer z, res = NULL;
+          push_stack_no_let(sc, OP_MAP_UNWIND, f, seq);
+          sc->map_call_ctr++;
+          if (is_pair(seq))
+            {
+              set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+              for (s7_pointer fast = seq, slow = seq; is_pair(fast); fast = cdr(fast), slow = cdr(slow))
+                {
+                  slot_set_value(slot, car(fast));
+                  z = func(sc);
+                  if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
+                  if (is_pair(cdr(fast)))
+                    {
+                      fast = cdr(fast);
+                      if (fast == slow)        break;
+                      slot_set_value(slot, car(fast));
+                      z = func(sc);
+                      if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
+                    }}
+              res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+            }
+          else
+            if (is_float_vector(seq))
+              {
+                s7_double *vals = float_vector_floats(seq);
+                s7_int len = vector_length(seq);
+                set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+                for (s7_int i = 0; i < len; i++)
+                  {
+                    slot_set_value(slot, make_real(sc, vals[i]));
+                    z = func(sc);
+                    if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
+                  }
+                res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+              }
+            else
+              if (is_int_vector(seq))
+                {
+                  s7_int *vals = int_vector_ints(seq);
+                  s7_int len = vector_length(seq);
+                  set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+                  for (s7_int i = 0; i < len; i++)
+                    {
+                      slot_set_value(slot, make_integer(sc, vals[i]));
+                      z = func(sc);
+                      if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
+                    }
+                  res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+                }
+              else
+                if (is_t_vector(seq))
+                  {
+                    s7_pointer *vals = vector_elements(seq);
+                    s7_int len = vector_length(seq);
+                    set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+                    for (s7_int i = 0; i < len; i++)
+                      {
+                        slot_set_value(slot, vals[i]);
+                        z = func(sc);
+                        if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
+                      }
+                    res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+                  }
+                else
+                  if (is_string(seq))
+                    {
+                      s7_int len = string_length(seq);
+                      const char *str = string_value(seq);
+                      set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+                      for (s7_int i = 0; i < len; i++)
+                        {
+                          slot_set_value(slot, chars[(uint8_t)(str[i])]);
+                          z = func(sc);
+                          if (z != sc->no_value) set_stack_protected3_with(sc, cons(sc, z, stack_protected3(sc)), OP_MAP_UNWIND);
+                        }
+                      res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+                    }
+          sc->map_call_ctr--;
+          unstack_with(sc, OP_MAP_UNWIND);
+          if ((S7_DEBUGGING) && (sc->map_call_ctr < 0)) {fprintf(stderr, "%s[%d]: map ctr: %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr); sc->map_call_ctr = 0;}
+          if (res) return(res);
+        }
       set_no_cell_opt(body);
       set_curlet(sc, old_e);
     }
@@ -69117,7 +69117,7 @@ static s7_pointer g_map_closure(s7_scheme *sc, s7_pointer f, s7_pointer seq) /*
   if (!is_iterator(seq))
     {
       if (!is_mappable(seq))
-	wrong_type_error_nr(sc, sc->map_symbol, 2, seq, a_sequence_string);
+        wrong_type_error_nr(sc, sc->map_symbol, 2, seq, a_sequence_string);
       sc->z = s7_make_iterator(sc, seq);
     }
   else sc->z = seq;
@@ -69136,69 +69136,69 @@ static s7_pointer g_map_closure_2(s7_scheme *sc, s7_pointer f, s7_pointer seq1,
       s7_pointer val1 = seq_init(sc, seq1);
       s7_pointer val2 = seq_init(sc, seq2);
       set_curlet(sc, make_let_with_two_slots(sc, closure_let(f),
-					    (is_pair(car(pars))) ? caar(pars) : car(pars), val1,
-					    (is_pair(cadr(pars))) ? cadar(pars) : cadr(pars), val2));
+                                            (is_pair(car(pars))) ? caar(pars) : car(pars), val1,
+                                            (is_pair(cadr(pars))) ? cadar(pars) : cadr(pars), val2));
       slot1 = let_slots(sc->curlet);
       slot2 = next_slot(slot1);
 
       if (sc->map_call_ctr == 0)
-	{
-	  if (is_null(cdr(body)))
-	    func = s7_cell_optimize(sc, body, false);
-	  else
-	    if (is_null(cddr(body)))
-	      {
-		set_ulist_1(sc, sc->begin_symbol, body);
-		func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), false);
-	      }}
+        {
+          if (is_null(cdr(body)))
+            func = s7_cell_optimize(sc, body, false);
+          else
+            if (is_null(cddr(body)))
+              {
+                set_ulist_1(sc, sc->begin_symbol, body);
+                func = s7_cell_optimize(sc, set_clist_1(sc, sc->u1_1), false);
+              }}
       if (func)
-	{
-	  s7_pointer res = NULL;
-	  push_stack_no_let(sc, OP_MAP_UNWIND, f, seq1);
-	  sc->map_call_ctr++;
-	  if ((is_pair(seq1)) && (is_pair(seq2)))
-	    {
-	      set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-	      map_or_for_each_closure_pair_2(sc, func, seq1, seq2, slot1, slot2, false); /* builds result on stack_protected3 */
-	      res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-	    }
-	  else
-	    if ((is_any_vector(seq1)) && (is_any_vector(seq2)))
-	      {
-		set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-		map_or_for_each_closure_vector_2(sc, func, seq1, seq2, slot1, slot2, false);
-		res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-	      }
-	    else
-	      if ((is_string(seq1)) && (is_string(seq2)))
-		{
-		  set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
-		  map_or_for_each_closure_string_2(sc, func, seq1, seq2, slot1, slot2, false);
-		  res = proper_list_reverse_in_place(sc, stack_protected3(sc));
-		}
-	  sc->map_call_ctr--;
-	  unstack_with(sc, OP_MAP_UNWIND);
-	  set_curlet(sc, old_e);
-	  if (res) return(res);
-	  set_no_cell_opt(body);
-	}
+        {
+          s7_pointer res = NULL;
+          push_stack_no_let(sc, OP_MAP_UNWIND, f, seq1);
+          sc->map_call_ctr++;
+          if ((is_pair(seq1)) && (is_pair(seq2)))
+            {
+              set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+              map_or_for_each_closure_pair_2(sc, func, seq1, seq2, slot1, slot2, false); /* builds result on stack_protected3 */
+              res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+            }
+          else
+            if ((is_any_vector(seq1)) && (is_any_vector(seq2)))
+              {
+                set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+                map_or_for_each_closure_vector_2(sc, func, seq1, seq2, slot1, slot2, false);
+                res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+              }
+            else
+              if ((is_string(seq1)) && (is_string(seq2)))
+                {
+                  set_stack_protected3_with(sc, sc->nil, OP_MAP_UNWIND);
+                  map_or_for_each_closure_string_2(sc, func, seq1, seq2, slot1, slot2, false);
+                  res = proper_list_reverse_in_place(sc, stack_protected3(sc));
+                }
+          sc->map_call_ctr--;
+          unstack_with(sc, OP_MAP_UNWIND);
+          set_curlet(sc, old_e);
+          if (res) return(res);
+          set_no_cell_opt(body);
+        }
       else /* not func */
-	{
-	  set_no_cell_opt(body);
-	  set_curlet(sc, old_e);
-	}}
+        {
+          set_no_cell_opt(body);
+          set_curlet(sc, old_e);
+        }}
 
   if (!is_iterator(seq1))
     {
       if (!is_mappable(seq1))
-	wrong_type_error_nr(sc, sc->map_symbol, 2, seq1, a_sequence_string);
+        wrong_type_error_nr(sc, sc->map_symbol, 2, seq1, a_sequence_string);
       sc->z = s7_make_iterator(sc, seq1);
     }
   else sc->z = seq1;
   if (!is_iterator(seq2))
     {
       if (!is_mappable(seq2))
-	wrong_type_error_nr(sc, sc->map_symbol, 3, seq2, a_sequence_string);
+        wrong_type_error_nr(sc, sc->map_symbol, 3, seq2, a_sequence_string);
       sc->z = list_2(sc, sc->z, s7_make_iterator(sc, seq2));
     }
   else sc->z = list_2(sc, sc->z, seq2);
@@ -69224,166 +69224,166 @@ a list of the results.  Its arguments can be lists, vectors, strings, hash-table
   for (len = 0, p = cdr(args); is_not_null(p); p = cdr(p), len++)
     if (!is_mappable(car(p)))
       {
-	if (is_null(car(p)))
-	  got_nil = true;
-	else wrong_type_error_nr(sc, sc->map_symbol, len + 2, car(p), a_sequence_string);
+        if (is_null(car(p)))
+          got_nil = true;
+        else wrong_type_error_nr(sc, sc->map_symbol, len + 2, car(p), a_sequence_string);
       }
 
   switch (type(f))
     {
     case T_C_FUNCTION:
       if (!(c_function_is_aritable(f, len)))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_4(sc, wrap_string(sc, "map ~A: ~D argument~P?", 22), f, wrap_integer(sc, len), wrap_integer(sc, len)));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_4(sc, wrap_string(sc, "map ~A: ~D argument~P?", 22), f, wrap_integer(sc, len), wrap_integer(sc, len)));
     case T_C_RST_NO_REQ_FUNCTION:
       /* if function is safe c func, do the map locally */
       if (got_nil) return(sc->nil);
       if (is_safe_procedure(f))
-	{
-	  s7_pointer val, val1, old_args, iter_list;
-	  s7_function func = c_function_call(f);
-	  if (is_pair(cadr(args)))
-	    {
-	      if (len == 1)
-		{
-		  s7_p_p_t fp = s7_p_p_function(f);
-		  if (fp)
-		    {
-		      val = list_1_unchecked(sc, sc->nil);
-		      gc_protect_via_stack(sc, val);
-		      for (s7_pointer fast = cadr(args), slow = cadr(args); is_pair(fast); fast = cdr(fast), slow = cdr(slow))
-			{
-			  s7_pointer z = fp(sc, car(fast));
-			  if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
-			  if (is_pair(cdr(fast)))
-			    {
-			      fast = cdr(fast);
-			      if (fast == slow) break;
-			      z = fp(sc, car(fast));
-			      if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
-			    }}
-		      unstack_gc_protect(sc);
-		      return(proper_list_reverse_in_place(sc, car(val)));
-		    }}
-	      if ((len == 2) && (is_pair(caddr(args))))
-		{
-		  s7_p_pp_t fp = s7_p_pp_function(f);
-		  if (fp)
-		    {
-		      val = list_1_unchecked(sc, sc->nil);
-		      gc_protect_via_stack(sc, val);
-		      for (s7_pointer fast1 = cadr(args), slow1 = cadr(args), fast2 = caddr(args), slow2 = caddr(args);
-			   (is_pair(fast1)) && (is_pair(fast2));
-			   fast1 = cdr(fast1), slow1 = cdr(slow1), fast2 = cdr(fast2), slow2 = cdr(slow2))
-			{
-			  s7_pointer z = fp(sc, car(fast1), car(fast2));
-			  if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
-			  if ((is_pair(cdr(fast1))) && (is_pair(cdr(fast2))))
-			    {
-			      fast1 = cdr(fast1);
-			      if (fast1 == slow1) break;
-			      fast2 = cdr(fast2);
-			      if (fast2 == slow2) break;
-			      z = fp(sc, car(fast1), car(fast2));
-			      if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
-			    }}
-		      unstack_gc_protect(sc);
-		      return(proper_list_reverse_in_place(sc, car(val)));
-		    }}}
-	  if ((is_string(cadr(args))) && (len == 1))
-	    {
-	      s7_p_p_t fp = s7_p_p_function(f);
-	      if (fp)
-		{
-		  s7_pointer str = cadr(args);
-		  const char *s = string_value(str);
-		  val = list_1_unchecked(sc, sc->nil);
-		  gc_protect_via_stack(sc, val);
-		  len = string_length(str);
-		  for (s7_int i = 0; i < len; i++)
-		    {
-		      s7_pointer z = fp(sc, chars[(uint8_t)(s[i])]);
-		      if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
-		    }
-		  unstack_gc_protect(sc);
-		  return(proper_list_reverse_in_place(sc, car(val)));
-		}}
-	  if ((is_any_vector(cadr(args))) && (len == 1))
-	    {
-	      s7_p_p_t fp = s7_p_p_function(f);
-	      if (fp)
-		{
-		  s7_pointer vec = cadr(args);
-		  val = list_1_unchecked(sc, sc->nil);
-		  gc_protect_via_stack(sc, val);
-		  len = vector_length(vec);
-		  for (s7_int i = 0; i < len; i++)
-		    {
-		      s7_pointer z = fp(sc, vector_getter(vec)(sc, vec, i));
-		      if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
-		    }
-		  unstack_gc_protect(sc);
-		  return(proper_list_reverse_in_place(sc, car(val)));
-		}}
-
-	  sc->z = make_iterators(sc, sc->map_symbol, args);
-	  val1 = cons_unchecked(sc, sc->z, make_list(sc, len, sc->nil));
-	  iter_list = sc->z;
-	  old_args = sc->args;
-	  push_stack_no_let(sc, OP_GC_PROTECT, val1, val = cons(sc, sc->nil, sc->code)); /* temporary GC protection: need to protect val1, iter_list, val */
-	  sc->z = sc->unused;
-	  while (true)
-	    {
-	      s7_pointer z;
-	      for (s7_pointer x = iter_list, y = cdr(val1); is_pair(x); x = cdr(x), y = cdr(y))
-		{
-		  set_car(y, s7_iterate(sc, car(x)));
-		  if (iterator_is_at_end(car(x)))
-		    {
-		      unstack_gc_protect(sc); /* free_cell(sc, car(x)); */ /* 16-Jan-19 iterator in circular list -- see s7test */
-		      sc->args = T_Pos(old_args); /* can be #<unused> or #<counter> */
-		      return(proper_list_reverse_in_place(sc, car(val)));
-		    }}
-	      z = func(sc, cdr(val1)); /* multiple-values? values is unsafe, but s7_values used externally and claims to be safe? */ /* func = c_function_call(f) */
-	      if (z != sc->no_value)
-		set_car(val, cons(sc, z, car(val)));
-	    }}
+        {
+          s7_pointer val, val1, old_args, iter_list;
+          s7_function func = c_function_call(f);
+          if (is_pair(cadr(args)))
+            {
+              if (len == 1)
+                {
+                  s7_p_p_t fp = s7_p_p_function(f);
+                  if (fp)
+                    {
+                      val = list_1_unchecked(sc, sc->nil);
+                      gc_protect_via_stack(sc, val);
+                      for (s7_pointer fast = cadr(args), slow = cadr(args); is_pair(fast); fast = cdr(fast), slow = cdr(slow))
+                        {
+                          s7_pointer z = fp(sc, car(fast));
+                          if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
+                          if (is_pair(cdr(fast)))
+                            {
+                              fast = cdr(fast);
+                              if (fast == slow) break;
+                              z = fp(sc, car(fast));
+                              if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
+                            }}
+                      unstack_gc_protect(sc);
+                      return(proper_list_reverse_in_place(sc, car(val)));
+                    }}
+              if ((len == 2) && (is_pair(caddr(args))))
+                {
+                  s7_p_pp_t fp = s7_p_pp_function(f);
+                  if (fp)
+                    {
+                      val = list_1_unchecked(sc, sc->nil);
+                      gc_protect_via_stack(sc, val);
+                      for (s7_pointer fast1 = cadr(args), slow1 = cadr(args), fast2 = caddr(args), slow2 = caddr(args);
+                           (is_pair(fast1)) && (is_pair(fast2));
+                           fast1 = cdr(fast1), slow1 = cdr(slow1), fast2 = cdr(fast2), slow2 = cdr(slow2))
+                        {
+                          s7_pointer z = fp(sc, car(fast1), car(fast2));
+                          if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
+                          if ((is_pair(cdr(fast1))) && (is_pair(cdr(fast2))))
+                            {
+                              fast1 = cdr(fast1);
+                              if (fast1 == slow1) break;
+                              fast2 = cdr(fast2);
+                              if (fast2 == slow2) break;
+                              z = fp(sc, car(fast1), car(fast2));
+                              if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
+                            }}
+                      unstack_gc_protect(sc);
+                      return(proper_list_reverse_in_place(sc, car(val)));
+                    }}}
+          if ((is_string(cadr(args))) && (len == 1))
+            {
+              s7_p_p_t fp = s7_p_p_function(f);
+              if (fp)
+                {
+                  s7_pointer str = cadr(args);
+                  const char *s = string_value(str);
+                  val = list_1_unchecked(sc, sc->nil);
+                  gc_protect_via_stack(sc, val);
+                  len = string_length(str);
+                  for (s7_int i = 0; i < len; i++)
+                    {
+                      s7_pointer z = fp(sc, chars[(uint8_t)(s[i])]);
+                      if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
+                    }
+                  unstack_gc_protect(sc);
+                  return(proper_list_reverse_in_place(sc, car(val)));
+                }}
+          if ((is_any_vector(cadr(args))) && (len == 1))
+            {
+              s7_p_p_t fp = s7_p_p_function(f);
+              if (fp)
+                {
+                  s7_pointer vec = cadr(args);
+                  val = list_1_unchecked(sc, sc->nil);
+                  gc_protect_via_stack(sc, val);
+                  len = vector_length(vec);
+                  for (s7_int i = 0; i < len; i++)
+                    {
+                      s7_pointer z = fp(sc, vector_getter(vec)(sc, vec, i));
+                      if (z != sc->no_value) set_car(val, cons(sc, z, car(val)));
+                    }
+                  unstack_gc_protect(sc);
+                  return(proper_list_reverse_in_place(sc, car(val)));
+                }}
+
+          sc->z = make_iterators(sc, sc->map_symbol, args);
+          val1 = cons_unchecked(sc, sc->z, make_list(sc, len, sc->nil));
+          iter_list = sc->z;
+          old_args = sc->args;
+          push_stack_no_let(sc, OP_GC_PROTECT, val1, val = cons(sc, sc->nil, sc->code)); /* temporary GC protection: need to protect val1, iter_list, val */
+          sc->z = sc->unused;
+          while (true)
+            {
+              s7_pointer z;
+              for (s7_pointer x = iter_list, y = cdr(val1); is_pair(x); x = cdr(x), y = cdr(y))
+                {
+                  set_car(y, s7_iterate(sc, car(x)));
+                  if (iterator_is_at_end(car(x)))
+                    {
+                      unstack_gc_protect(sc); /* free_cell(sc, car(x)); */ /* 16-Jan-19 iterator in circular list -- see s7test */
+                      sc->args = T_Pos(old_args); /* can be #<unused> or #<counter> */
+                      return(proper_list_reverse_in_place(sc, car(val)));
+                    }}
+              z = func(sc, cdr(val1)); /* multiple-values? values is unsafe, but s7_values used externally and claims to be safe? */ /* func = c_function_call(f) */
+              if (z != sc->no_value)
+                set_car(val, cons(sc, z, car(val)));
+            }}
 
       else /* not safe procedure */
-	if ((f == global_value(sc->values_symbol)) &&
-	    (len == 1) &&
-	    (!has_methods(cadr(args)))) /* iterator should be ok here -- object_to_list can handle it */
-	  {
-	    p = object_to_list(sc, cadr(args));
-	    if (p != cadr(args))
-	      return(p);
-	  }
+        if ((f == global_value(sc->values_symbol)) &&
+            (len == 1) &&
+            (!has_methods(cadr(args)))) /* iterator should be ok here -- object_to_list can handle it */
+          {
+            p = object_to_list(sc, cadr(args));
+            if (p != cadr(args))
+              return(p);
+          }
       break;
 
     case T_CLOSURE:
     case T_CLOSURE_STAR:
       {
-	int32_t fargs = (is_closure(f)) ? closure_arity_to_int(sc, f) : closure_star_arity_to_int(sc, f);
-	if ((len == 1) &&
-	    (fargs == 1) &&
-	    (!is_constant_symbol(sc, (is_pair(car(closure_args(f)))) ? caar(closure_args(f)) : car(closure_args(f)))))
-	  {
-	    if (got_nil) return(sc->nil);
-	    if (is_closure_star(f))
-	      return(g_map_closure(sc, f, cadr(args)));
-
-	    /* don't go to OP_MAP_2 here! It assumes no recursion */
-	    sc->z = (!is_iterator(cadr(args))) ? s7_make_iterator(sc, cadr(args)) : cadr(args);
-	    push_stack(sc, OP_MAP_1, inline_make_counter(sc, sc->z), f);
-	    sc->z = sc->unused;
-	    symbol_increment_ctr(car(closure_args(f)));
-	    return(sc->nil);
-	  }
-	if (((fargs >= 0) && (fargs < len)) ||
-	    ((is_closure(f)) && (abs(fargs) > len)))
-	  error_nr(sc, sc->wrong_number_of_args_symbol,
-		   set_elist_4(sc, wrap_string(sc, "map ~A: ~D argument~P?", 22), f, wrap_integer(sc, len), wrap_integer(sc, len)));
-	if (got_nil) return(sc->nil);
+        int32_t fargs = (is_closure(f)) ? closure_arity_to_int(sc, f) : closure_star_arity_to_int(sc, f);
+        if ((len == 1) &&
+            (fargs == 1) &&
+            (!is_constant_symbol(sc, (is_pair(car(closure_args(f)))) ? caar(closure_args(f)) : car(closure_args(f)))))
+          {
+            if (got_nil) return(sc->nil);
+            if (is_closure_star(f))
+              return(g_map_closure(sc, f, cadr(args)));
+
+            /* don't go to OP_MAP_2 here! It assumes no recursion */
+            sc->z = (!is_iterator(cadr(args))) ? s7_make_iterator(sc, cadr(args)) : cadr(args);
+            push_stack(sc, OP_MAP_1, inline_make_counter(sc, sc->z), f);
+            sc->z = sc->unused;
+            symbol_increment_ctr(car(closure_args(f)));
+            return(sc->nil);
+          }
+        if (((fargs >= 0) && (fargs < len)) ||
+            ((is_closure(f)) && (abs(fargs) > len)))
+          error_nr(sc, sc->wrong_number_of_args_symbol,
+                   set_elist_4(sc, wrap_string(sc, "map ~A: ~D argument~P?", 22), f, wrap_integer(sc, len), wrap_integer(sc, len)));
+        if (got_nil) return(sc->nil);
       }
       break;
 
@@ -69394,11 +69394,11 @@ a list of the results.  Its arguments can be lists, vectors, strings, hash-table
 
     default:
       if (!is_applicable(f))
-	return(method_or_bust(sc, f, sc->map_symbol, args, something_applicable_string, 1));
+        return(method_or_bust(sc, f, sc->map_symbol, args, something_applicable_string, 1));
       if ((!is_pair(f)) &&
-	  (!s7_is_aritable(sc, f, len)))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_4(sc, wrap_string(sc, "map: ~D argument~P for ~A?", 26), wrap_integer(sc, len), wrap_integer(sc, len), f));
+          (!s7_is_aritable(sc, f, len)))
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_4(sc, wrap_string(sc, "map: ~D argument~P for ~A?", 26), wrap_integer(sc, len), wrap_integer(sc, len), f));
       if (got_nil) return(sc->nil);
       break;
     }
@@ -69417,11 +69417,11 @@ static bool op_map(s7_scheme *sc)
     {
       s7_pointer x = s7_iterate(sc, car(y));
       if (iterator_is_at_end(car(y)))
-	{
-	  sc->value = proper_list_reverse_in_place(sc, counter_result(sc->args));
-	  free_cell(sc, sc->args);  /* unsafe? */ /* not sc->args = sc->nil; */
-	  return(true);
-	}
+        {
+          sc->value = proper_list_reverse_in_place(sc, counter_result(sc->args));
+          free_cell(sc, sc->args);  /* unsafe? */ /* not sc->args = sc->nil; */
+          return(true);
+        }
       sc->x = cons(sc, x, sc->x);
     }
   sc->x = proper_list_reverse_in_place(sc, sc->x);
@@ -69488,11 +69488,11 @@ static bool op_map_2(s7_scheme *sc) /* possibly inline lg */
       closure_set_map_list(code, cdr(closure_map_list(code)));
       /* this depends on code (the function) being non-recursive, else closure_setter gets stepped on */
       if (closure_map_list(code) == counter_list(c))
-	{
-	  sc->value = proper_list_reverse_in_place(sc, counter_result(c));
-	  free_cell(sc, c);  /* possibly unsafe */ /* not sc->args = sc->nil; */
-	  return(true);
-	}
+        {
+          sc->value = proper_list_reverse_in_place(sc, counter_result(c));
+          free_cell(sc, c);  /* possibly unsafe */ /* not sc->args = sc->nil; */
+          return(true);
+        }
       push_stack_direct(sc, OP_MAP_GATHER_2);
     }
   else push_stack_direct(sc, OP_MAP_GATHER_3);
@@ -69521,10 +69521,10 @@ static s7_pointer revappend(s7_scheme *sc, s7_pointer a, s7_pointer b)
     {
       a = copy_proper_list(sc, a);
       do {
-	s7_pointer q = cdr(a);
-	set_cdr(a, p);
-	p = a;
-	a = q;
+        s7_pointer q = cdr(a);
+        set_cdr(a, p);
+        p = a;
+        a = q;
       } while (is_pair(a));
     }
   return(p);
@@ -69535,7 +69535,7 @@ static Inline void inline_op_map_gather(s7_scheme *sc) /* called thrice in eval,
   if (sc->value != sc->no_value)
     {
       if (is_multiple_value(sc->value))
-	counter_set_result(sc->args, revappend(sc, multiple_value(sc->value), counter_result(sc->args)));
+        counter_set_result(sc->args, revappend(sc, multiple_value(sc->value), counter_result(sc->args)));
       else counter_set_result(sc->args, cons(sc, sc->value, counter_result(sc->args)));
     }
 }
@@ -69564,12 +69564,12 @@ static s7_pointer op_safe_c_p_mv(s7_scheme *sc, s7_pointer args)
       sc->args = set_plist_3(sc, car(sc->value), cadr(sc->value), car(p));
     else
       {
-	s7_pointer lst;
-	s7_int len = proper_list_length(p) + 2;
-	sc->args = safe_list_if_possible(sc, len);
-	use_safe = (!in_heap(sc->args));
-	lst = sc->args;
-	for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
+        s7_pointer lst;
+        s7_int len = proper_list_length(p) + 2;
+        sc->args = safe_list_if_possible(sc, len);
+        use_safe = (!in_heap(sc->args));
+        lst = sc->args;
+        for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
       }
   sc->code = c_function_base(opt1_cfunc(sc->code));
   if (type(sc->code) == T_C_FUNCTION)
@@ -69593,17 +69593,17 @@ static s7_pointer op_safe_c_pc_mv(s7_scheme *sc, s7_pointer args)
   else
     {
       if (is_null(cdr(p)))
-	sc->args = set_plist_4(sc, car(sc->value), cadr(sc->value), car(p), sc->args);
+        sc->args = set_plist_4(sc, car(sc->value), cadr(sc->value), car(p), sc->args);
       else             /* sc->args = pair_append(sc, sc->value, list_1(sc, sc->args)); */ /* not plist! sc->value is not reusable */
-	{
-	  s7_pointer lst, val = sc->args;
-	  s7_int len = proper_list_length(p);
-	  sc->args = safe_list_if_possible(sc, len + 3);
-	  use_safe = (!in_heap(sc->args));
-	  lst = sc->args;
-	  for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
-	  set_car(lst, val);
-	}}
+        {
+          s7_pointer lst, val = sc->args;
+          s7_int len = proper_list_length(p);
+          sc->args = safe_list_if_possible(sc, len + 3);
+          use_safe = (!in_heap(sc->args));
+          lst = sc->args;
+          for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
+          set_car(lst, val);
+        }}
   sc->code = c_function_base(opt1_cfunc(sc->code));
   if (type(sc->code) == T_C_FUNCTION)
     sc->value = apply_c_function_unopt(sc, sc->code, sc->args);
@@ -69626,17 +69626,17 @@ static s7_pointer op_safe_c_ps_mv(s7_scheme *sc, s7_pointer args)  /* (define (h
   else
     {
       if (is_null(cdr(p)))
-	sc->args = set_plist_4(sc, car(sc->value), cadr(sc->value), car(p), val);
+        sc->args = set_plist_4(sc, car(sc->value), cadr(sc->value), car(p), val);
       else                   /* sc->args = pair_append(sc, sc->value, list_1(sc, val)); */
-	{
-	  s7_pointer lst;
-	  s7_int len = proper_list_length(p);
-	  sc->args = safe_list_if_possible(sc, len + 3); /* sc->args is not clobbered by fx_call (below) */
-	  use_safe = (!in_heap(sc->args));
-	  lst = sc->args;
-	  for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
-	  set_car(lst, val);
-	}}
+        {
+          s7_pointer lst;
+          s7_int len = proper_list_length(p);
+          sc->args = safe_list_if_possible(sc, len + 3); /* sc->args is not clobbered by fx_call (below) */
+          use_safe = (!in_heap(sc->args));
+          lst = sc->args;
+          for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
+          set_car(lst, val);
+        }}
   sc->code = c_function_base(opt1_cfunc(sc->code));
   if (type(sc->code) == T_C_FUNCTION)
     sc->value = apply_c_function_unopt(sc, sc->code, sc->args);
@@ -69661,21 +69661,21 @@ static s7_pointer op_safe_c_pa_mv(s7_scheme *sc, s7_pointer args)
   else
     {
       if (is_null(cdr(p)))
-	{
-	  s7_pointer val1 = car(sc->value), val2 = cadr(sc->value), val3 = car(p);
-	  s7_pointer val4 = fx_call(sc, cddr(sc->code));
-	  sc->args = set_plist_4(sc, val1, val2, val3, val4);
-	}
+        {
+          s7_pointer val1 = car(sc->value), val2 = cadr(sc->value), val3 = car(p);
+          s7_pointer val4 = fx_call(sc, cddr(sc->code));
+          sc->args = set_plist_4(sc, val1, val2, val3, val4);
+        }
       else
-	{
-	  s7_pointer lst;
-	  s7_int len = proper_list_length(p);
-	  sc->args = safe_list_if_possible(sc, len + 3); /* sc->args is not clobbered by fx_call (below) */
-	  use_safe = (!in_heap(sc->args));
-	  lst = sc->args;
-	  for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
-	  set_car(lst, fx_call(sc, cddr(sc->code)));
-	}}
+        {
+          s7_pointer lst;
+          s7_int len = proper_list_length(p);
+          sc->args = safe_list_if_possible(sc, len + 3); /* sc->args is not clobbered by fx_call (below) */
+          use_safe = (!in_heap(sc->args));
+          lst = sc->args;
+          for (s7_pointer p = sc->value; is_pair(p); p = cdr(p), lst = cdr(lst)) set_car(lst, car(p));
+          set_car(lst, fx_call(sc, cddr(sc->code)));
+        }}
   sc->code = c_function_base(opt1_cfunc(sc->code));
   if (type(sc->code) == T_C_FUNCTION)
     sc->value = apply_c_function_unopt(sc, sc->code, sc->args);
@@ -69775,7 +69775,7 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
   s7_pointer x;
   if (SHOW_EVAL_OPS)
     safe_print(fprintf(stderr, "  %s[%d]: splice %s %s\n", __func__, __LINE__,
-		       (sc->stack_end > sc->stack_start) ? op_names[stack_top_op(sc)] : "no stack!", display_truncated(args)));
+                       (sc->stack_end > sc->stack_start) ? op_names[stack_top_op(sc)] : "no stack!", display_truncated(args)));
   if ((S7_DEBUGGING) && ((is_null(args)) || (is_null(cdr(args))))) fprintf(stderr, "%s: %s\n", __func__, display(args));
 
   switch (unchecked_stack_top_op(sc)) /* unchecked for C s7_values call at top-level -- see ffitest.c */
@@ -69791,7 +69791,7 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
        */
       sc->w = args;
       for (x = args; is_not_null(cdr(x)); x = cdr(x))
-	set_stack_top_args(sc, cons(sc, car(x), stack_top_args(sc)));
+        set_stack_top_args(sc, cons(sc, car(x), stack_top_args(sc)));
       sc->w = sc->unused;
       return(car(x));
 
@@ -69799,12 +69799,12 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
       /* (let ((g-1 (lambda (x a b c) (x (+ a 1) (- b 1) 2 (values c 2))))) (g-1 (macro (x y z w) (list-values '+ x y z w)) 2 3 5)) */
       /* code = previous arg saved, args = ante-previous args reversed, we'll take value->code->args and reverse in args5 */
       if (is_null(args))
-	return(sc->unspecified);
+        return(sc->unspecified);
       if (is_null(cdr(args)))
-	return(car(args));
+        return(car(args));
       set_stack_top_args(sc, cons(sc, stack_top_code(sc), stack_top_args(sc)));
       for (x = args; is_not_null(cddr(x)); x = cdr(x))
-	set_stack_top_args(sc, cons(sc, car(x), stack_top_args(sc)));
+        set_stack_top_args(sc, cons(sc, car(x), stack_top_args(sc)));
       set_stack_top_code(sc, car(x));
       return(cadr(x));
 
@@ -69823,7 +69823,7 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
     case OP_ANY_CLOSURE_NP_1: case OP_ANY_CLOSURE_NP_2:
       sc->code = pop_op_stack(sc);
       error_nr(sc, sc->wrong_number_of_args_symbol,
-	       set_elist_3(sc, too_many_arguments_string, closure_name(sc, sc->code), set_ulist_1(sc, sc->value_symbol, args)));
+               set_elist_3(sc, too_many_arguments_string, closure_name(sc, sc->code), set_ulist_1(sc, sc->value_symbol, args)));
 
     case OP_ANY_C_NP_2:
       set_stack_top_op(sc, OP_ANY_C_NP_MV);
@@ -69834,11 +69834,11 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
     case OP_ANY_C_NP_MV:
     FP_MV:
       if ((is_immutable(args)) || /* (let () (define (func) (with-output-to-string (lambda () (apply-values (write '(1 2)))))) (func) (func)) */
-	  (needs_copied_args(args)))
-	{
-	  clear_needs_copied_args(args);
-	  args = copy_proper_list(sc, args);
-	}
+          (needs_copied_args(args)))
+        {
+          clear_needs_copied_args(args);
+          args = copy_proper_list(sc, args);
+        }
       set_multiple_value(args);
       return(args);
 
@@ -69881,8 +69881,8 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
     case OP_SET_FROM_LET_TEMP:                /* (let-temporarily ((var (values 1 2 3))) var) */
     case OP_SET_FROM_SETTER:                  /* stack_top_code(sc) is slot if (set! x (set! (setter 'x) g)) s7test.scm */
       syntax_error_with_caller_nr(sc, "set!: can't set ~A to ~S", 24,
-				  (is_slot(stack_top_code(sc))) ? slot_symbol(stack_top_code(sc)) : stack_top_code(sc),
-				  set_ulist_1(sc, sc->values_symbol, args));
+                                  (is_slot(stack_top_code(sc))) ? slot_symbol(stack_top_code(sc)) : stack_top_code(sc),
+                                  set_ulist_1(sc, sc->values_symbol, args));
 
     case OP_SET_opSAq_P_1: case OP_SET_opSAAq_P_1:
       /* we can assume here that we're dealing with the section after the target, (set! (target...) arg) where arg can't be (values...)
@@ -69900,49 +69900,49 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
 
     case OP_LET1:                         /* (let ((var (values 1 2 3))) ...) */
       {
-	/* (let () (define (hi) (let ((x (values 1 2))) (if x (list x)))) (define (ho) (hi)) (catch #t (lambda () (ho)) (lambda args #f)) (ho)) */
-	s7_pointer let_code, vars, sym, p = stack_top_args(sc);
-	for (let_code = p; is_pair(cdr(let_code)); let_code = cdr(let_code));
-	for (vars = caar(let_code); is_pair(cdr(p)); p = cdr(p), vars = cdr(vars));
-	sym = caar(vars);
-	syntax_error_with_caller2_nr(sc, "~A: can't bind ~A to ~S", 23, sc->let_symbol, sym, set_ulist_1(sc, sc->values_symbol, args));
-	/* stack_args: ((((x (values 1 2))) x)) in (let ((x (values 1 2))) x)
-	 *             (1 (((x 1) (y (values 1 2))) x)) in (let ((x 1) (y (values 1 2))) x)
-	 */
+        /* (let () (define (hi) (let ((x (values 1 2))) (if x (list x)))) (define (ho) (hi)) (catch #t (lambda () (ho)) (lambda args #f)) (ho)) */
+        s7_pointer let_code, vars, sym, p = stack_top_args(sc);
+        for (let_code = p; is_pair(cdr(let_code)); let_code = cdr(let_code));
+        for (vars = caar(let_code); is_pair(cdr(p)); p = cdr(p), vars = cdr(vars));
+        sym = caar(vars);
+        syntax_error_with_caller2_nr(sc, "~A: can't bind ~A to ~S", 23, sc->let_symbol, sym, set_ulist_1(sc, sc->values_symbol, args));
+        /* stack_args: ((((x (values 1 2))) x)) in (let ((x (values 1 2))) x)
+         *             (1 (((x 1) (y (values 1 2))) x)) in (let ((x 1) (y (values 1 2))) x)
+         */
       }
 
     case OP_LET_ONE_NEW_1: case OP_LET_ONE_P_NEW_1:
       /* (let () (define (hi) (let ((x (values 1 2))) (display x) (if x (list x)))) (define (ho) (hi)) (catch #t (lambda () (ho)) (lambda args #f)) (ho)) */
       syntax_error_with_caller2_nr(sc, "~A: can't bind ~A to ~S", 23, sc->let_symbol,
-			      opt2_sym(stack_top_code(sc)), set_ulist_1(sc, sc->values_symbol, args));
+                              opt2_sym(stack_top_code(sc)), set_ulist_1(sc, sc->values_symbol, args));
 
     case OP_LET_ONE_OLD_1: case OP_LET_ONE_P_OLD_1:
       syntax_error_with_caller2_nr(sc, "~A: can't bind ~A to ~S", 23, sc->let_symbol,
-			      slot_symbol(let_slots(opt3_let(stack_top_code(sc)))), set_ulist_1(sc, sc->values_symbol, args));
+                              slot_symbol(let_slots(opt3_let(stack_top_code(sc)))), set_ulist_1(sc, sc->values_symbol, args));
 
     case OP_LET_STAR1:             /* here caar(sc->code) is bound to sc->value */
       syntax_error_with_caller2_nr(sc, "~A: can't bind ~A to ~S", 23, sc->let_star_symbol,
-			      caar(stack_top_code(sc)), set_ulist_1(sc, sc->values_symbol, args));
+                              caar(stack_top_code(sc)), set_ulist_1(sc, sc->values_symbol, args));
 
     case OP_LETREC1:               /* here sc->args is the slot about to receive a value */
       syntax_error_with_caller2_nr(sc, "~A: can't bind ~A to ~S", 23, sc->letrec_symbol,
-			      slot_symbol(stack_top_args(sc)), set_ulist_1(sc, sc->values_symbol, args));
+                              slot_symbol(stack_top_args(sc)), set_ulist_1(sc, sc->values_symbol, args));
 
     case OP_LETREC_STAR1:
       syntax_error_with_caller2_nr(sc, "~A: can't bind ~A to ~S", 23, sc->letrec_star_symbol,
-			      slot_symbol(stack_top_args(sc)), set_ulist_1(sc, sc->values_symbol, args));
+                              slot_symbol(stack_top_args(sc)), set_ulist_1(sc, sc->values_symbol, args));
 
     case OP_AND_P1:
     case OP_AND_SAFE_P_REST: /* from OP_AND_SAFE_P1 or P2 */
       for (x = args; is_not_null(cdr(x)); x = cdr(x))
-	if (car(x) == sc->F)
-	  return(sc->F);
+        if (car(x) == sc->F)
+          return(sc->F);
       return(car(x));
 
     case OP_OR_P1:
       for (x = args; is_not_null(cdr(x)); x = cdr(x))
-	if (car(x) != sc->F)
-	  return(car(x));
+        if (car(x) != sc->F)
+          return(car(x));
       return(car(x));
 
     case OP_IF1:    /* (if (values ...) ...) -- see s7.html at the end of the values writeup for explanation (we're following CL here) */
@@ -69959,15 +69959,15 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
 
     case OP_DYNAMIC_UNWIND: case OP_DYNAMIC_UNWIND_PROFILE:
       {
-	s7_pointer old_value = sc->value;
-	bool mv = is_multiple_value(args);
-	if (mv) clear_multiple_value(args);
-	sc->value = cons(sc, sc->values_symbol, args);
-	dynamic_unwind(sc, stack_top_code(sc), stack_top_args(sc)); /* position (curlet), this applies code to sc->value */
-	sc->value = old_value;
-	if (mv) set_multiple_value(args);
-	sc->stack_end -= 4; /* either op is possible I think */
-	return(splice_in_values(sc, args));
+        s7_pointer old_value = sc->value;
+        bool mv = is_multiple_value(args);
+        if (mv) clear_multiple_value(args);
+        sc->value = cons(sc, sc->values_symbol, args);
+        dynamic_unwind(sc, stack_top_code(sc), stack_top_args(sc)); /* position (curlet), this applies code to sc->value */
+        sc->value = old_value;
+        if (mv) set_multiple_value(args);
+        sc->stack_end -= 4; /* either op is possible I think */
+        return(splice_in_values(sc, args));
       }
 
     case OP_DEACTIVATE_GOTO:  /* (+ (call-with-exit (lambda (ret) (values 1 2 3)))) */
@@ -69994,35 +69994,35 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
 
     case OP_EVAL_MACRO_MV: /* perhaps reader-cond expansion at eval-time (not at run-time) via ((let () reader-cond) ...)? */
       {
-	opcode_t s_op = stack_top4_op(sc);
-	if ((S7_DEBUGGING) && (SHOW_EVAL_OPS))
-	  fprintf(stderr, "  eval_macro_mv splice %s with %s, code: %s, args: %s, value: %s\n",
-		  display_truncated(args), op_names[s_op], display_truncated(sc->code), display_truncated(sc->args), display_truncated(sc->value));
-	if ((s_op == OP_DO_STEP) || (s_op == OP_DEACTIVATE_GOTO) || (s_op == OP_LET1))
-	  return(args); /* tricky reader-cond as macro in do body returning values... or call-with-exit */
-
-	/* if eval_args2 here, how to maintain the current evaluation?
-	 *   (+ (reader-cond (#t 1 (values 2 3) 4))) -> 10
+        opcode_t s_op = stack_top4_op(sc);
+        if ((S7_DEBUGGING) && (SHOW_EVAL_OPS))
+          fprintf(stderr, "  eval_macro_mv splice %s with %s, code: %s, args: %s, value: %s\n",
+                  display_truncated(args), op_names[s_op], display_truncated(sc->code), display_truncated(sc->args), display_truncated(sc->value));
+        if ((s_op == OP_DO_STEP) || (s_op == OP_DEACTIVATE_GOTO) || (s_op == OP_LET1))
+          return(args); /* tricky reader-cond as macro in do body returning values... or call-with-exit */
+
+        /* if eval_args2 here, how to maintain the current evaluation?
+         *   (+ (reader-cond (#t 1 (values 2 3) 4))) -> 10
          *   (+ (((vector reader-cond) 0) (#t 1 (values 2 3) 4))) -> 5 [10 if this block of code is included, s7test is ok with this code]
-	 */
-	if (s_op == OP_EVAL_ARGS2)
-	  {
-	    sc->w = args;
-	    for (x = args; is_not_null(cdr(x)); x = cdr(x))
-	      stack_top4_args(sc) = cons(sc, car(x), stack_top4_args(sc));
-	    sc->w = sc->unused;
-	    if (SHOW_EVAL_OPS)
-	      fprintf(stderr, "  eval_macro splice %s with %s, code: %s, args: %s, value: %s -> %s %s\n",
-		      display_truncated(args), op_names[s_op], display_truncated(sc->code), display_truncated(sc->args),
-		      display_truncated(sc->value), display_truncated(stack_top4_args(sc)), display_truncated(car(x)));
-	    return(car(x));
-	  }
-	/* else fall through */
-	/* safe_c_p_1 also happens and currently drops trailing arg: ((let () reader-cond) (#t (values 1 2) (iv)))
-	 *   op_eval_macro (not op_expansion) is called and can be included below (except it segfaults in s7test...), but trailing arg
-	 *   is still dropped because optimizer sees (reader-cond ...) -- one arg!
-	 *   (define iv (int-vector 1 2)) (define (func) (eof-object? ((let () reader-cond) (#t (values 1 2) (iv))))) (func)
-	 */
+         */
+        if (s_op == OP_EVAL_ARGS2)
+          {
+            sc->w = args;
+            for (x = args; is_not_null(cdr(x)); x = cdr(x))
+              stack_top4_args(sc) = cons(sc, car(x), stack_top4_args(sc));
+            sc->w = sc->unused;
+            if (SHOW_EVAL_OPS)
+              fprintf(stderr, "  eval_macro splice %s with %s, code: %s, args: %s, value: %s -> %s %s\n",
+                      display_truncated(args), op_names[s_op], display_truncated(sc->code), display_truncated(sc->args),
+                      display_truncated(sc->value), display_truncated(stack_top4_args(sc)), display_truncated(car(x)));
+            return(car(x));
+          }
+        /* else fall through */
+        /* safe_c_p_1 also happens and currently drops trailing arg: ((let () reader-cond) (#t (values 1 2) (iv)))
+         *   op_eval_macro (not op_expansion) is called and can be included below (except it segfaults in s7test...), but trailing arg
+         *   is still dropped because optimizer sees (reader-cond ...) -- one arg!
+         *   (define iv (int-vector 1 2)) (define (func) (eof-object? ((let () reader-cond) (#t (values 1 2) (iv))))) (func)
+         */
       }
 
     case OP_EXPANSION:
@@ -70032,24 +70032,24 @@ static s7_pointer splice_in_values(s7_scheme *sc, s7_pointer args)
        * (+ (reader-cond (#t 1 (values 2 3) 4)))
        */
       if (SHOW_EVAL_OPS)
-	fprintf(stderr, "  %s[%d]: %s stack top: %" ld64 ", op: %s, args: %s\n", __func__, __LINE__,
-		op_names[stack_top_op(sc)], (s7_int)(intptr_t)stack_top(sc), op_names[stack_top4_op(sc)], display_truncated(args));
+        fprintf(stderr, "  %s[%d]: %s stack top: %" ld64 ", op: %s, args: %s\n", __func__, __LINE__,
+                op_names[stack_top_op(sc)], (s7_int)(intptr_t)stack_top(sc), op_names[stack_top4_op(sc)], display_truncated(args));
       if (stack_top4_op(sc) == OP_LOAD_RETURN_IF_EOF)
-	{
-	  /* expansion at top-level returned values, eval args in order */
-	  sc->code = args;
-	  push_stack_no_args_direct(sc, sc->begin_op);
-	  return(sc->code);
-	}
+        {
+          /* expansion at top-level returned values, eval args in order */
+          sc->code = args;
+          push_stack_no_args_direct(sc, sc->begin_op);
+          return(sc->code);
+        }
       for (x = args; is_not_null(cdr(x)); x = cdr(x))
-	stack_top4_args(sc) = cons(sc, car(x), stack_top4_args(sc));
+        stack_top4_args(sc) = cons(sc, car(x), stack_top4_args(sc));
       pop_stack_no_op(sc);         /* need GC protection in loop above, so do this afterwards */
       return(car(x));              /* sc->value from OP_READ_LIST point of view */
 
     case OP_EVAL_DONE:    /* ((lambda (w) 1) (char-ready? (open-input-function (lambda (x) (values 1 2 3 4 5 6 7))))) */
       if (stack_top4_op(sc) == OP_NO_VALUES)
- 	error_nr(sc, sc->error_symbol,
-		 set_elist_1(sc, wrap_string(sc, "function-port should not return multiple-values", 47)));
+         error_nr(sc, sc->error_symbol,
+                 set_elist_1(sc, wrap_string(sc, "function-port should not return multiple-values", 47)));
       set_stack_top_op(sc, OP_SPLICE_VALUES); /* tricky -- continue from eval_done with the current splice */
       set_stack_top_args(sc, args);
       push_stack_op(sc, OP_EVAL_DONE);
@@ -70117,8 +70117,8 @@ static s7_pointer splice_out_values(s7_scheme *sc, s7_pointer args)
   for (s7_pointer p = cdr(args), np = tp; is_pair(p); p = cdr(p))
     if (car(p) != sc->no_value)
       {
-	set_cdr(np, list_1(sc, car(p)));
-	np = cdr(np);
+        set_cdr(np, list_1(sc, car(p)));
+        np = cdr(np);
       }
   sc->temp8 = sc->unused;
   return(tp);
@@ -70137,30 +70137,30 @@ static s7_pointer g_list_values(s7_scheme *sc, s7_pointer args)
   for (x = args; is_pair(x); x = cdr(x))
     if (is_pair(car(x)))
       {
-	if (is_checked(car(x)))
-	  checked = true;
+        if (is_checked(car(x)))
+          checked = true;
       }
     else
       if (car(x) == sc->no_value) /* unchecked_car|cdr unrolled here is not faster */
-	break;
+        break;
   if (is_null(x))
     {
       if (!checked) /* (!tree_has_definers(sc, args)) seems to work, reduces copy_tree calls slightly, but costs more than it saves in tgen */
-	{
-	  for (s7_pointer p = args; is_pair(p); p = cdr(p)) /* embedded list can be immutable, so we need to copy (sigh) */
-	    if (is_immutable_pair(p))
-	      return(copy_proper_list(sc, args));
-	  return(args);
-	}
+        {
+          for (s7_pointer p = args; is_pair(p); p = cdr(p)) /* embedded list can be immutable, so we need to copy (sigh) */
+            if (is_immutable_pair(p))
+              return(copy_proper_list(sc, args));
+          return(args);
+        }
       sc->temp5 = args;
       check_free_heap_size(sc, 8192);
       if (sc->safety > NO_SAFETY)
-	{
-	  if (!tree_is_cyclic(sc, args)) /* we're copying to clear optimizations I think, and a cyclic list here can't be optimized */
-	    args = cons_unchecked(sc,     /* since list-values is a safe function, args can be immutable, which should not be passed through the copy */
-				  (is_unquoted_pair(car(args))) ? copy_tree_with_type(sc, car(args)) : car(args),
-				  (is_unquoted_pair(cdr(args))) ? copy_tree_with_type(sc, cdr(args)) : cdr(args));
-	}
+        {
+          if (!tree_is_cyclic(sc, args)) /* we're copying to clear optimizations I think, and a cyclic list here can't be optimized */
+            args = cons_unchecked(sc,     /* since list-values is a safe function, args can be immutable, which should not be passed through the copy */
+                                  (is_unquoted_pair(car(args))) ? copy_tree_with_type(sc, car(args)) : car(args),
+                                  (is_unquoted_pair(cdr(args))) ? copy_tree_with_type(sc, cdr(args)) : cdr(args));
+        }
       else args = copy_tree(sc, args);      /* not copy_any_list here -- see comment below */
       sc->temp5 = sc->unused;
       return(args);
@@ -70229,24 +70229,24 @@ static bool is_simple_code(s7_scheme *sc, s7_pointer form)
   for (tmp = form, slow = form; is_pair(tmp); tmp = cdr(tmp), slow = cdr(slow))
     {
       if (is_pair(car(tmp)))
-	{
-	  if (!is_simple_code(sc, car(tmp)))
-	    return(false);
-	}
+        {
+          if (!is_simple_code(sc, car(tmp)))
+            return(false);
+        }
       else
-	if (car(tmp) == sc->unquote_symbol)
-	  return(false);
+        if (car(tmp) == sc->unquote_symbol)
+          return(false);
       tmp = cdr(tmp);
       if (!is_pair(tmp)) return(is_null(tmp));
       if (tmp == slow) return(false);
       if (is_pair(car(tmp)))
-	{
-	  if (!is_simple_code(sc, car(tmp)))
-	    return(false);
-	}
+        {
+          if (!is_simple_code(sc, car(tmp)))
+            return(false);
+        }
       else
-	if (car(tmp) == sc->unquote_symbol)
-	  return(false);
+        if (car(tmp) == sc->unquote_symbol)
+          return(false);
     }
   return(is_null(tmp));
 }
@@ -70273,13 +70273,13 @@ and splices the resultant list into the outer list. `(1 ,(+ 1 1) ,@(list 3 4)) -
   if (car(form) == sc->unquote_symbol)
     {
       if (!is_pair(cdr(form)))             /* (unquote) or (unquote . 1) */
-	{
-	  if (is_null(cdr(form)))
-	    syntax_error_nr(sc, "unquote: no argument, ~S", 24, form);
-	  syntax_error_nr(sc, "unquote: stray dot, ~S", 22, form);
-	}
+        {
+          if (is_null(cdr(form)))
+            syntax_error_nr(sc, "unquote: no argument, ~S", 24, form);
+          syntax_error_nr(sc, "unquote: stray dot, ~S", 22, form);
+        }
       if (is_not_null(cddr(form)))
-	syntax_error_nr(sc, "unquote: too many arguments, ~S", 31, form);
+        syntax_error_nr(sc, "unquote: too many arguments, ~S", 31, form);
       return(cadr(form));
     }
 
@@ -70298,8 +70298,8 @@ and splices the resultant list into the outer list. `(1 ,(+ 1 1) ,@(list 3 4)) -
     s7_int len = s7_list_length(sc, form);
     if (len < 0)
       {
-	len = -len;
-	dotted = true;
+        len = -len;
+        dotted = true;
       }
     gc_protect_via_stack(sc, sc->w);
 
@@ -70311,31 +70311,31 @@ and splices the resultant list into the outer list. `(1 ,(+ 1 1) ,@(list 3 4)) -
     set_car(sc->w, initial_value(sc->list_values_symbol));
     if (!dotted)
       {
-	for (orig = form, bq = cdr(sc->w), i = 0; i < len; i++, orig = cdr(orig), bq = cdr(bq))
-	  if ((is_pair(cdr(orig))) &&             /* this was is_pair(orig) which seems to be always the case */
-	      (cadr(orig) == sc->unquote_symbol)) /* `(1 . ,(+ 1 1)) -> '(1 unquote (+ 1 1)) -> '(1 . 2) etc */
-	    {
-	      if (!is_pair(cddr(orig)))
-		{
-		  sc->w = old_scw;
-		  unstack_gc_protect(sc);
-		  syntax_error_nr(sc, "unquote: no argument, ~S", 24, form);
-		}
-	      set_car(bq, g_quasiquote_1(sc, car(orig), false));
-	      set_cdr(bq, sc->nil);
-	      sc->w = list_3(sc, initial_value(sc->qq_append_symbol), sc->w, caddr(orig)); /* `(f . ,(string-append "h" "i")) */
-	      break;
-	    }
-	  else set_car(bq, g_quasiquote_1(sc, car(orig), false));
+        for (orig = form, bq = cdr(sc->w), i = 0; i < len; i++, orig = cdr(orig), bq = cdr(bq))
+          if ((is_pair(cdr(orig))) &&             /* this was is_pair(orig) which seems to be always the case */
+              (cadr(orig) == sc->unquote_symbol)) /* `(1 . ,(+ 1 1)) -> '(1 unquote (+ 1 1)) -> '(1 . 2) etc */
+            {
+              if (!is_pair(cddr(orig)))
+                {
+                  sc->w = old_scw;
+                  unstack_gc_protect(sc);
+                  syntax_error_nr(sc, "unquote: no argument, ~S", 24, form);
+                }
+              set_car(bq, g_quasiquote_1(sc, car(orig), false));
+              set_cdr(bq, sc->nil);
+              sc->w = list_3(sc, initial_value(sc->qq_append_symbol), sc->w, caddr(orig)); /* `(f . ,(string-append "h" "i")) */
+              break;
+            }
+          else set_car(bq, g_quasiquote_1(sc, car(orig), false));
       }
     else /* `(1 2 . 3) */
       {
-	len--;
-	for (orig = form, bq = cdr(sc->w), i = 0; i < len; i++, orig = cdr(orig), bq = cdr(bq))
-	  set_car(bq, g_quasiquote_1(sc, car(orig), false));
-	set_car(bq, g_quasiquote_1(sc, car(orig), false));
-	sc->w = list_3(sc, initial_value(sc->qq_append_symbol), sc->w, g_quasiquote_1(sc, cdr(orig), false));
-	/* quasiquote might quote a symbol in cdr(orig), so it's not completely pointless */
+        len--;
+        for (orig = form, bq = cdr(sc->w), i = 0; i < len; i++, orig = cdr(orig), bq = cdr(bq))
+          set_car(bq, g_quasiquote_1(sc, car(orig), false));
+        set_car(bq, g_quasiquote_1(sc, car(orig), false));
+        sc->w = list_3(sc, initial_value(sc->qq_append_symbol), sc->w, g_quasiquote_1(sc, cdr(orig), false));
+        /* quasiquote might quote a symbol in cdr(orig), so it's not completely pointless */
       }
     bq = sc->w;
     sc->w = old_scw;
@@ -70370,7 +70370,7 @@ static s7_pointer g_qq_append(s7_scheme *sc, s7_pointer args)
 
 /* -------------------------------- choosers -------------------------------- */
 static s7_pointer make_function_with_class(s7_scheme *sc, s7_pointer cls, const char *name, s7_function f,
-					   int32_t required_args, int32_t optional_args, bool rest_arg)
+                                           int32_t required_args, int32_t optional_args, bool rest_arg)
 {
   s7_pointer uf = s7_make_safe_function(sc, name, f, required_args, optional_args, rest_arg, NULL);
   s7_function_set_class(sc, uf, cls);
@@ -70379,7 +70379,7 @@ static s7_pointer make_function_with_class(s7_scheme *sc, s7_pointer cls, const
 }
 
 static s7_pointer make_unsafe_function_with_class(s7_scheme *sc, s7_pointer cls, const char *name, s7_function f,
-						  int32_t required_args, int32_t optional_args, bool rest_arg)
+                                                  int32_t required_args, int32_t optional_args, bool rest_arg)
 {
   s7_pointer uf = s7_make_function(sc, name, f, required_args, optional_args, rest_arg, NULL); /* was s7_make_safe_function! 14-Dec-20 */
   s7_function_set_class(sc, uf, cls);
@@ -70734,7 +70734,7 @@ static void pair_set_current_input_location(s7_scheme *sc, s7_pointer p)
   if (current_input_port(sc) != sc->standard_input) /* (port_file_number(current_input_port(sc)) > 1) -- maybe 0 is legit? */
     {
       pair_set_location(p, port_location(current_input_port(sc)));
-      set_has_location(p);	      /* current_input_port(sc) above can't be nil(?) -- it falls back on stdin now */
+      set_has_location(p);              /* current_input_port(sc) above can't be nil(?) -- it falls back on stdin now */
     }
 }
 
@@ -70801,94 +70801,94 @@ static s7_pointer check_autoload_and_error_hook(s7_scheme *sc, s7_pointer sym)
       sc->temp7 = cons_unchecked(sc, current_let, cons_unchecked(sc, code,         /* perhaps elist_7 except we use elist_3 above? */
                     cons_unchecked(sc, args, list_4(sc, value, cur_code, x, z)))); /* not s7_list (debugger checks) */
       if (!is_pair(cur_code))
-	{
-	  /* isolated typo perhaps -- no pair to hold the position info, so make one. current_code(sc) is GC-protected, so this should be safe */
-	  cur_code = list_1(sc, sym);     /* the error will say "(sym)" which is not too misleading */
-	  pair_set_current_input_location(sc, cur_code);
-	}
+        {
+          /* isolated typo perhaps -- no pair to hold the position info, so make one. current_code(sc) is GC-protected, so this should be safe */
+          cur_code = list_1(sc, sym);     /* the error will say "(sym)" which is not too misleading */
+          pair_set_current_input_location(sc, cur_code);
+        }
 #if (!DISABLE_AUTOLOAD)
       if ((sc->is_autoloading) &&
-	  (sc->autoload_names)) /* created by s7_autoload_set_names which requires alphabetization by the caller (e.g. snd-xref.c) */
-	{
-	  bool loaded = false;
-	  const char *file = find_autoload_name(sc, sym, &loaded, true);
-	  if ((file) && (!loaded))
-	    {
-	      /* if we've already loaded this file, we can get the library (e) from a table [(file lib) ...]
-	       * here it was possible to get caught in a loop:
-	       *   change file, reload, unbound var seen, check autoload, it says "load file"... (where file does not get added to *libraries*)
-	       *   so the "loaded" arg tries to catch such cases
-	       */
-	      s7_pointer e = loaded_library(sc, file);
-	      if ((!e) || (!is_let(e)))
-		{
-		  if (hook_has_functions(sc->autoload_hook))
-		    s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, s7_make_string(sc, file)));
-		  e = s7_load(sc, file);         /* s7_load can return NULL */
-		}
-	      result = s7_symbol_value(sc, sym); /* calls lookup, does not trigger unbound_variable search */
-	      if ((result == sc->undefined) && (e) && (is_let(e)))
-		{
-		  /* the current_let refs here are trying to handle local autoloads, but that is problematic -- we'd need to
-		   *   save the autoload curlet when autoload is called, and hope the current reference can still access that let?
-		   *   but if the same symbol is autloaded in several lets, we are in trouble, and how to handle a function that
-		   *   has an autoload?  I think I'll just assume rootlet, even though that is not very elegant.  Actually in the
-		   *   libgsl case, we're trying to export a name from *libgsl* -- should that be done with define rather than autoload?
-		   */
-		  result = let_ref_p_pp(sc, e, sym);  /* add '(sym . result) to current_let (was sc->nil, s7_load can set sc->curlet to sc->nil) */
-		  if (result != sc->undefined)
-		    s7_define(sc, sc->nil /* current_let */, sym, result);
-		}}}
+          (sc->autoload_names)) /* created by s7_autoload_set_names which requires alphabetization by the caller (e.g. snd-xref.c) */
+        {
+          bool loaded = false;
+          const char *file = find_autoload_name(sc, sym, &loaded, true);
+          if ((file) && (!loaded))
+            {
+              /* if we've already loaded this file, we can get the library (e) from a table [(file lib) ...]
+               * here it was possible to get caught in a loop:
+               *   change file, reload, unbound var seen, check autoload, it says "load file"... (where file does not get added to *libraries*)
+               *   so the "loaded" arg tries to catch such cases
+               */
+              s7_pointer e = loaded_library(sc, file);
+              if ((!e) || (!is_let(e)))
+                {
+                  if (hook_has_functions(sc->autoload_hook))
+                    s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, s7_make_string(sc, file)));
+                  e = s7_load(sc, file);         /* s7_load can return NULL */
+                }
+              result = s7_symbol_value(sc, sym); /* calls lookup, does not trigger unbound_variable search */
+              if ((result == sc->undefined) && (e) && (is_let(e)))
+                {
+                  /* the current_let refs here are trying to handle local autoloads, but that is problematic -- we'd need to
+                   *   save the autoload curlet when autoload is called, and hope the current reference can still access that let?
+                   *   but if the same symbol is autloaded in several lets, we are in trouble, and how to handle a function that
+                   *   has an autoload?  I think I'll just assume rootlet, even though that is not very elegant.  Actually in the
+                   *   libgsl case, we're trying to export a name from *libgsl* -- should that be done with define rather than autoload?
+                   */
+                  result = let_ref_p_pp(sc, e, sym);  /* add '(sym . result) to current_let (was sc->nil, s7_load can set sc->curlet to sc->nil) */
+                  if (result != sc->undefined)
+                    s7_define(sc, sc->nil /* current_let */, sym, result);
+                }}}
 #endif
       if (result == sc->undefined)
-	{
+        {
 #if (!DISABLE_AUTOLOAD)
-	  /* check the *autoload* hash table */
-	  if ((sc->is_autoloading) &&
-	      (is_hash_table(sc->autoload_table)))
-	    {
-	      /* it was possible to get in a loop here: missing paren in x.scm, checks last symbol, sees
-	       *   autoload sym -> x.scm, loads x.scm, missing paren...
-	       */
-	      s7_pointer val = s7_hash_table_ref(sc, sc->autoload_table, sym);
-	      s7_pointer e = NULL;
-	      if (is_string(val))       /* val should be a filename. *load-path* is searched if necessary */
-		{
-		  if (hook_has_functions(sc->autoload_hook))
-		    s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, val));
-		  e = s7_load(sc, string_value(val));
-		}
-	      else
-		if (is_closure(val))   /* val should be a function of one argument, the current (calling) environment */
-		  {
-		    if (hook_has_functions(sc->autoload_hook))
-		      s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, val));
-		    e = s7_call(sc, val, set_ulist_1(sc, sc->curlet, sc->nil));
-		  }
-	      result = s7_symbol_value(sc, sym);                   /* calls lookup, does not trigger unbound_variable search */
-	      if ((result == sc->undefined) && (e) && (is_let(e))) /* added 31-Mar-23 to match sc->autoload_names case above */
-		{
-		  result = let_ref_p_pp(sc, e, sym);
-		  if (result != sc->undefined)
-		    s7_define(sc, sc->nil /* current_let */, sym, result); /* as above, was sc->nil -- s7_load above can set sc->curlet to sc->nil */
-		}}
-#endif
-	  /* check *unbound-variable-hook* */
-	  if ((result == sc->undefined) &&
-	      (is_procedure(sc->unbound_variable_hook)) &&
-	      (hook_has_functions(sc->unbound_variable_hook)))
-	    {
-	      /* (let () (set! (hook-functions *unbound-variable-hook*) (list (lambda (v) _asdf_))) _asdf_) */
-	      s7_pointer old_hook = sc->unbound_variable_hook;
-	      bool old_history_enabled = s7_set_history_enabled(sc, false);
-	      gc_protect_via_stack(sc, old_hook);
-	      sc->unbound_variable_hook = sc->nil;
-	      result = s7_call(sc, old_hook, set_plist_1(sc, sym)); /* not s7_apply_function */
-	      if (result == sc->unspecified) result = sc->undefined;
-	      sc->unbound_variable_hook = old_hook;
-	      s7_set_history_enabled(sc, old_history_enabled);
-	      unstack_gc_protect(sc);
-	    }}
+          /* check the *autoload* hash table */
+          if ((sc->is_autoloading) &&
+              (is_hash_table(sc->autoload_table)))
+            {
+              /* it was possible to get in a loop here: missing paren in x.scm, checks last symbol, sees
+               *   autoload sym -> x.scm, loads x.scm, missing paren...
+               */
+              s7_pointer val = s7_hash_table_ref(sc, sc->autoload_table, sym);
+              s7_pointer e = NULL;
+              if (is_string(val))       /* val should be a filename. *load-path* is searched if necessary */
+                {
+                  if (hook_has_functions(sc->autoload_hook))
+                    s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, val));
+                  e = s7_load(sc, string_value(val));
+                }
+              else
+                if (is_closure(val))   /* val should be a function of one argument, the current (calling) environment */
+                  {
+                    if (hook_has_functions(sc->autoload_hook))
+                      s7_apply_function(sc, sc->autoload_hook, set_plist_2(sc, sym, val));
+                    e = s7_call(sc, val, set_ulist_1(sc, sc->curlet, sc->nil));
+                  }
+              result = s7_symbol_value(sc, sym);                   /* calls lookup, does not trigger unbound_variable search */
+              if ((result == sc->undefined) && (e) && (is_let(e))) /* added 31-Mar-23 to match sc->autoload_names case above */
+                {
+                  result = let_ref_p_pp(sc, e, sym);
+                  if (result != sc->undefined)
+                    s7_define(sc, sc->nil /* current_let */, sym, result); /* as above, was sc->nil -- s7_load above can set sc->curlet to sc->nil */
+                }}
+#endif
+          /* check *unbound-variable-hook* */
+          if ((result == sc->undefined) &&
+              (is_procedure(sc->unbound_variable_hook)) &&
+              (hook_has_functions(sc->unbound_variable_hook)))
+            {
+              /* (let () (set! (hook-functions *unbound-variable-hook*) (list (lambda (v) _asdf_))) _asdf_) */
+              s7_pointer old_hook = sc->unbound_variable_hook;
+              bool old_history_enabled = s7_set_history_enabled(sc, false);
+              gc_protect_via_stack(sc, old_hook);
+              sc->unbound_variable_hook = sc->nil;
+              result = s7_call(sc, old_hook, set_plist_1(sc, sym)); /* not s7_apply_function */
+              if (result == sc->unspecified) result = sc->undefined;
+              sc->unbound_variable_hook = old_hook;
+              s7_set_history_enabled(sc, old_history_enabled);
+              unstack_gc_protect(sc);
+            }}
       sc->value = T_Ext(value);
       sc->args = T_Pos(args); /* can be #<unused> or #<counter>! */
       sc->code = code;
@@ -70939,7 +70939,7 @@ static void fx_annotate_args(s7_scheme *sc, s7_pointer args, s7_pointer e)
 static opt_t optimize_thunk(s7_scheme *sc, s7_pointer expr, s7_pointer func, int32_t hop, s7_pointer e)
 {
   if (SHOW_EVAL_OPS) fprintf(stderr, "  %s[%d]: expr: %s, func: %s, hop: %d, e: %s\n",
-			     __func__, __LINE__, display_truncated(expr), display(func), hop, display_truncated(e));
+                             __func__, __LINE__, display_truncated(expr), display(func), hop, display_truncated(e));
   if ((hop != 1) && (is_constant_symbol(sc, car(expr)))) hop = 1;
 
   if ((is_closure(func)) || (is_closure_star(func)))
@@ -70950,56 +70950,56 @@ static opt_t optimize_thunk(s7_scheme *sc, s7_pointer expr, s7_pointer func, int
 
       if (is_immutable(func)) hop = 1;
       if (is_null(closure_args(func)))               /* no rest arg funny business */
-	{
-	  set_optimized(expr);
-	  if ((one_form) && (safe_case) && (is_fxable(sc, car(body)))) /* fx stuff is not set yet */
-	    {
-	      fx_annotate_arg(sc, body, e);
-	      set_optimize_op(expr, hop + OP_SAFE_THUNK_A);
-	      set_closure_one_form_fx_arg(func);
-	      set_opt1_lambda_add(expr, func);
-	      return(OPT_T);
-	    }
-	  /* thunks with fully fxable bodies are rare apparently, and the time spent here overwhelms run time gains */
-	  set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_THUNK : ((one_form) ? OP_THUNK_O : OP_THUNK)));
-	  set_opt1_lambda_add(expr, func);
-	  return((safe_case) ? OPT_T : OPT_F);
-	}
+        {
+          set_optimized(expr);
+          if ((one_form) && (safe_case) && (is_fxable(sc, car(body)))) /* fx stuff is not set yet */
+            {
+              fx_annotate_arg(sc, body, e);
+              set_optimize_op(expr, hop + OP_SAFE_THUNK_A);
+              set_closure_one_form_fx_arg(func);
+              set_opt1_lambda_add(expr, func);
+              return(OPT_T);
+            }
+          /* thunks with fully fxable bodies are rare apparently, and the time spent here overwhelms run time gains */
+          set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_THUNK : ((one_form) ? OP_THUNK_O : OP_THUNK)));
+          set_opt1_lambda_add(expr, func);
+          return((safe_case) ? OPT_T : OPT_F);
+        }
 
       if (is_symbol(closure_args(func))) /* (define* (f1 . a) ...) called (f1) -- called a closure (not closure*) in define_unchecked */
-	{
-	  set_opt1_lambda_add(expr, func);
-	  if (safe_case)
-	    {
-	      if (!has_fx(body))
-		{
-		  fx_annotate_args(sc, body, e);
-		  fx_tree(sc, body, closure_args(func), NULL, NULL, false);
-		}
-	      set_safe_optimize_op(expr, hop + OP_SAFE_THUNK_ANY);
-	      return(OPT_T);
-	    }
-	  set_unsafe_optimize_op(expr, hop + OP_THUNK_ANY); /* "thunk" because here it is called with no args, I guess */
-	  return(OPT_F);
-	}
+        {
+          set_opt1_lambda_add(expr, func);
+          if (safe_case)
+            {
+              if (!has_fx(body))
+                {
+                  fx_annotate_args(sc, body, e);
+                  fx_tree(sc, body, closure_args(func), NULL, NULL, false);
+                }
+              set_safe_optimize_op(expr, hop + OP_SAFE_THUNK_ANY);
+              return(OPT_T);
+            }
+          set_unsafe_optimize_op(expr, hop + OP_THUNK_ANY); /* "thunk" because here it is called with no args, I guess */
+          return(OPT_F);
+        }
       if (is_closure_star(func))
-	{
-	  set_opt1_lambda_add(expr, func);
-	  set_safe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_0 : OP_CLOSURE_STAR_NA));
-	}
+        {
+          set_opt1_lambda_add(expr, func);
+          set_safe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_0 : OP_CLOSURE_STAR_NA));
+        }
       return(OPT_F);
     }
   if (is_c_function(func))
     {
       if (c_function_min_args(func) != 0)
-	return(OPT_F);
+        return(OPT_F);
       if ((hop == 0) && (symbol_id(car(expr)) == 0)) hop = 1;
       if (is_safe_procedure(func))
-	{
-	  set_safe_optimize_op(expr, hop + OP_SAFE_C_NC);
-	  choose_c_function(sc, expr, func, 0);
-	  return(OPT_T);
-	}
+        {
+          set_safe_optimize_op(expr, hop + OP_SAFE_C_NC);
+          choose_c_function(sc, expr, func, 0);
+          return(OPT_T);
+        }
       set_unsafe_optimize_op(expr, hop + OP_C);
       choose_c_function(sc, expr, func, 0);
       return(OPT_F);
@@ -71019,116 +71019,116 @@ static int32_t combine_ops(s7_scheme *sc, s7_pointer expr, combine_op_t cop, s7_
     {
     case E_C_P:
       switch (op_no_hop(e1))
-	{
-	case OP_SAFE_C_S:      return(OP_SAFE_C_opSq);
-	case OP_SAFE_C_NC:     return(OP_SAFE_C_opNCq);
-	case OP_SAFE_C_SC:     return(OP_SAFE_C_opSCq);
-	case OP_SAFE_C_CS:     return(OP_SAFE_C_opCSq);
-	case OP_SAFE_C_A:      return(OP_SAFE_C_opAq);
-	case OP_SAFE_C_AA:     return(OP_SAFE_C_opAAq);
-	case OP_SAFE_C_AAA:    return(OP_SAFE_C_opAAAq);
-	case OP_SAFE_C_SS:
-	  set_opt3_sym(expr, cadr(e1));
-	  set_opt1_sym(cdr(expr), caddr(e1));
-	  return(OP_SAFE_C_opSSq);
-	case OP_SAFE_C_opSq:
-	  set_opt3_pair(expr, cadr(e1));
-	  set_opt3_sym(cdr(expr), cadadr(e1));
-	  return(OP_SAFE_C_op_opSqq);
-	case OP_SAFE_C_S_opSq:
-	  set_opt3_pair(expr, caddr(e1));
-	  return(OP_SAFE_C_op_S_opSqq);
-	case OP_SAFE_C_opSq_S:
-	  set_opt3_pair(expr, cadr(e1));
-	  return(OP_SAFE_C_op_opSq_Sq);
-	}
+        {
+        case OP_SAFE_C_S:      return(OP_SAFE_C_opSq);
+        case OP_SAFE_C_NC:     return(OP_SAFE_C_opNCq);
+        case OP_SAFE_C_SC:     return(OP_SAFE_C_opSCq);
+        case OP_SAFE_C_CS:     return(OP_SAFE_C_opCSq);
+        case OP_SAFE_C_A:      return(OP_SAFE_C_opAq);
+        case OP_SAFE_C_AA:     return(OP_SAFE_C_opAAq);
+        case OP_SAFE_C_AAA:    return(OP_SAFE_C_opAAAq);
+        case OP_SAFE_C_SS:
+          set_opt3_sym(expr, cadr(e1));
+          set_opt1_sym(cdr(expr), caddr(e1));
+          return(OP_SAFE_C_opSSq);
+        case OP_SAFE_C_opSq:
+          set_opt3_pair(expr, cadr(e1));
+          set_opt3_sym(cdr(expr), cadadr(e1));
+          return(OP_SAFE_C_op_opSqq);
+        case OP_SAFE_C_S_opSq:
+          set_opt3_pair(expr, caddr(e1));
+          return(OP_SAFE_C_op_S_opSqq);
+        case OP_SAFE_C_opSq_S:
+          set_opt3_pair(expr, cadr(e1));
+          return(OP_SAFE_C_op_opSq_Sq);
+        }
       return(OP_SAFE_C_P); /* this splits out to A in optimize_func one_arg */
 
     case E_C_SP:
       switch (op_no_hop(e2))
-	{
-	case OP_SAFE_C_S:   return(OP_SAFE_C_S_opSq);
-	case OP_SAFE_C_AA:  return(OP_SAFE_C_S_opAAq);
-	case OP_SAFE_C_SC:
-	  set_opt2_con(cdr(expr), caddr(e2));
-	  return(OP_SAFE_C_S_opSCq);
-	case OP_SAFE_C_CS:	  /* expr is (* a (- 1 b)), e2 is (- 1 b) */
-	  set_opt2_sym(cdr(expr), caddr(e2));
-	  return(OP_SAFE_C_S_opCSq);
-	case OP_SAFE_C_SS:	  /* (* a (- b c)) */
-	  set_opt2_sym(cdr(expr), caddr(e2));
-	  return(OP_SAFE_C_S_opSSq);
-	case OP_SAFE_C_A:
-	  set_opt3_pair(expr, cdaddr(expr));
-	  return(OP_SAFE_C_S_opAq);
-	}
+        {
+        case OP_SAFE_C_S:   return(OP_SAFE_C_S_opSq);
+        case OP_SAFE_C_AA:  return(OP_SAFE_C_S_opAAq);
+        case OP_SAFE_C_SC:
+          set_opt2_con(cdr(expr), caddr(e2));
+          return(OP_SAFE_C_S_opSCq);
+        case OP_SAFE_C_CS:          /* expr is (* a (- 1 b)), e2 is (- 1 b) */
+          set_opt2_sym(cdr(expr), caddr(e2));
+          return(OP_SAFE_C_S_opCSq);
+        case OP_SAFE_C_SS:          /* (* a (- b c)) */
+          set_opt2_sym(cdr(expr), caddr(e2));
+          return(OP_SAFE_C_S_opSSq);
+        case OP_SAFE_C_A:
+          set_opt3_pair(expr, cdaddr(expr));
+          return(OP_SAFE_C_S_opAq);
+        }
       return(OP_SAFE_C_SP); /* if fxable -> AA later */
 
     case E_C_PS:
       switch (op_no_hop(e1))
-	{
-	case OP_SAFE_C_S:
-	  set_opt1_sym(cdr(expr), cadr(e1));
-	  set_opt3_sym(expr, e2);
-	  return(OP_SAFE_C_opSq_S);
-	case OP_SAFE_C_SS:    return(OP_SAFE_C_opSSq_S);
-	case OP_SAFE_C_CS:    return(OP_SAFE_C_opCSq_S);
-	case OP_SAFE_C_A:     return(OP_SAFE_C_opAq_S);
-	case OP_SAFE_C_opSSq:
-	  set_opt1_pair(cdr(expr), cadadr(expr));
-	  set_opt3_pair(expr, cadr(e1));
-	  return(OP_SAFE_C_op_opSSqq_S);
-	}
+        {
+        case OP_SAFE_C_S:
+          set_opt1_sym(cdr(expr), cadr(e1));
+          set_opt3_sym(expr, e2);
+          return(OP_SAFE_C_opSq_S);
+        case OP_SAFE_C_SS:    return(OP_SAFE_C_opSSq_S);
+        case OP_SAFE_C_CS:    return(OP_SAFE_C_opCSq_S);
+        case OP_SAFE_C_A:     return(OP_SAFE_C_opAq_S);
+        case OP_SAFE_C_opSSq:
+          set_opt1_pair(cdr(expr), cadadr(expr));
+          set_opt3_pair(expr, cadr(e1));
+          return(OP_SAFE_C_op_opSSqq_S);
+        }
       return(OP_SAFE_C_PS);
 
     case E_C_PC:
       switch (op_no_hop(e1))
-	{
-	case OP_SAFE_C_S:
-	  set_opt1_sym(cdr(expr), cadr(e1));
-	  set_opt2_con(cdr(expr), e2);
-	  return(OP_SAFE_C_opSq_C);
-	case OP_SAFE_C_CS:    return(OP_SAFE_C_opCSq_C);
-	case OP_SAFE_C_SC:    return(OP_SAFE_C_opSCq_C);
-	case OP_SAFE_C_SS:
-	  set_opt3_con(cdr(expr), caddr(expr));
-	  return(OP_SAFE_C_opSSq_C);
-	}
+        {
+        case OP_SAFE_C_S:
+          set_opt1_sym(cdr(expr), cadr(e1));
+          set_opt2_con(cdr(expr), e2);
+          return(OP_SAFE_C_opSq_C);
+        case OP_SAFE_C_CS:    return(OP_SAFE_C_opCSq_C);
+        case OP_SAFE_C_SC:    return(OP_SAFE_C_opSCq_C);
+        case OP_SAFE_C_SS:
+          set_opt3_con(cdr(expr), caddr(expr));
+          return(OP_SAFE_C_opSSq_C);
+        }
       set_opt3_con(cdr(expr), caddr(expr));
       return(OP_SAFE_C_PC);
 
     case E_C_CP:
       switch (op_no_hop(e2))
-	{
-	case OP_SAFE_C_S:
-	  set_opt3_pair(expr, e2);
-	  return(OP_SAFE_C_C_opSq);
-	case OP_SAFE_C_SC:
-	  set_opt1_sym(cdr(expr), cadr(e2));
-	  set_opt2_con(cdr(expr), caddr(e2));
-	  return(OP_SAFE_C_C_opSCq);
-	case OP_SAFE_C_SS:
-	  set_opt1_sym(cdr(expr), cadr(e2));
-	  return(OP_SAFE_C_C_opSSq);
-	}
+        {
+        case OP_SAFE_C_S:
+          set_opt3_pair(expr, e2);
+          return(OP_SAFE_C_C_opSq);
+        case OP_SAFE_C_SC:
+          set_opt1_sym(cdr(expr), cadr(e2));
+          set_opt2_con(cdr(expr), caddr(e2));
+          return(OP_SAFE_C_C_opSCq);
+        case OP_SAFE_C_SS:
+          set_opt1_sym(cdr(expr), cadr(e2));
+          return(OP_SAFE_C_C_opSSq);
+        }
       return(OP_SAFE_C_CP);
 
     case E_C_PP:
       switch (op_no_hop(e2))
-	{
-	case OP_SAFE_C_S:
-	  if (is_safe_c_s(e1))
-	    return(OP_SAFE_C_opSq_opSq);
-	  if (optimize_op_match(e1, OP_SAFE_C_SS))
-	    return(OP_SAFE_C_opSSq_opSq);
-	  break;
-	case OP_SAFE_C_SS:
-	  if (optimize_op_match(e1, OP_SAFE_C_SS))
-	    return(OP_SAFE_C_opSSq_opSSq);
-	  if (is_safe_c_s(e1))
-	    return(OP_SAFE_C_opSq_opSSq);
-	  break;
-	}
+        {
+        case OP_SAFE_C_S:
+          if (is_safe_c_s(e1))
+            return(OP_SAFE_C_opSq_opSq);
+          if (optimize_op_match(e1, OP_SAFE_C_SS))
+            return(OP_SAFE_C_opSSq_opSq);
+          break;
+        case OP_SAFE_C_SS:
+          if (optimize_op_match(e1, OP_SAFE_C_SS))
+            return(OP_SAFE_C_opSSq_opSSq);
+          if (is_safe_c_s(e1))
+            return(OP_SAFE_C_opSq_opSSq);
+          break;
+        }
       return(OP_SAFE_C_PP);
 
     default: break;
@@ -71140,7 +71140,7 @@ static bool arg_findable(s7_scheme *sc, s7_pointer arg1, s7_pointer e)
 {
   if (pair_symbol_is_safe(sc, arg1, e)) return(true); /* includes global_slot check */
   return((!sc->in_with_let) &&
-	 (is_slot(s7_slot(sc, arg1))));
+         (is_slot(s7_slot(sc, arg1))));
 }
 
 static bool safe_c_aa_to_ag_ga(s7_scheme *sc, s7_pointer arg, int32_t hop)
@@ -71172,14 +71172,14 @@ static opt_t wrap_bad_args(s7_scheme *sc, s7_pointer func, s7_pointer expr, int3
   if (is_c_function(func))
     {
       set_safe_optimize_op(expr, hop + ((is_safe_procedure(func)) ?
-					((n_args == 1) ? OP_SAFE_C_A : OP_SAFE_C_AA) :
-					((n_args == 1) ? ((is_semisafe(func)) ? OP_CL_A : OP_C_A) :
-					                 ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA))));
+                                        ((n_args == 1) ? OP_SAFE_C_A : OP_SAFE_C_AA) :
+                                        ((n_args == 1) ? ((is_semisafe(func)) ? OP_CL_A : OP_C_A) :
+                                                         ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA))));
       if (op_no_hop(expr) == OP_SAFE_C_AA)
-	{
-	  set_opt3_pair(expr, cddr(expr));
-	  if (optimize_op(expr) == HOP_SAFE_C_AA) return(check_c_aa(sc, expr, func, hop, e));
-	}
+        {
+          set_opt3_pair(expr, cddr(expr));
+          if (optimize_op(expr) == HOP_SAFE_C_AA) return(check_c_aa(sc, expr, func, hop, e));
+        }
       set_c_function(expr, func);
       return(OPT_T);
     }
@@ -71191,13 +71191,13 @@ static opt_t wrap_bad_args(s7_scheme *sc, s7_pointer func, s7_pointer expr, int3
       set_unsafely_optimized(expr);
       set_opt1_lambda_add(expr, func);
       if (one_form)
-	set_optimize_op(expr, hop + ((safe_case) ?
-				     ((n_args == 1) ? OP_SAFE_CLOSURE_A_O : OP_SAFE_CLOSURE_AA_O) :
-				     ((n_args == 1) ? OP_CLOSURE_A_O : OP_CLOSURE_AA_O)));
+        set_optimize_op(expr, hop + ((safe_case) ?
+                                     ((n_args == 1) ? OP_SAFE_CLOSURE_A_O : OP_SAFE_CLOSURE_AA_O) :
+                                     ((n_args == 1) ? OP_CLOSURE_A_O : OP_CLOSURE_AA_O)));
       else
-	set_optimize_op(expr, hop + ((safe_case) ?
-				     ((n_args == 1) ? OP_SAFE_CLOSURE_A : OP_SAFE_CLOSURE_AA) :
-				     ((n_args == 1) ? OP_CLOSURE_A : OP_CLOSURE_AA)));
+        set_optimize_op(expr, hop + ((safe_case) ?
+                                     ((n_args == 1) ? OP_SAFE_CLOSURE_A : OP_SAFE_CLOSURE_AA) :
+                                     ((n_args == 1) ? OP_CLOSURE_A : OP_CLOSURE_AA)));
       return(OPT_F);
     }
   if ((is_closure_star(func)) &&
@@ -71207,12 +71207,12 @@ static opt_t wrap_bad_args(s7_scheme *sc, s7_pointer func, s7_pointer expr, int3
     {
       set_unsafely_optimized(expr);
       if (n_args == 1)
-	set_optimize_op(expr, ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_STAR_A : OP_CLOSURE_STAR_A));
+        set_optimize_op(expr, ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_STAR_A : OP_CLOSURE_STAR_A));
       else
-	if (closure_star_arity_to_int(sc, func) == 2)
-	  set_optimize_op(expr, ((is_safe_closure(func)) ? ((is_null(cdr(closure_body(func)))) ? OP_SAFE_CLOSURE_STAR_AA_O :
-							    OP_SAFE_CLOSURE_STAR_AA) : OP_CLOSURE_STAR_NA));
-	else set_optimize_op(expr, ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA));
+        if (closure_star_arity_to_int(sc, func) == 2)
+          set_optimize_op(expr, ((is_safe_closure(func)) ? ((is_null(cdr(closure_body(func)))) ? OP_SAFE_CLOSURE_STAR_AA_O :
+                                                            OP_SAFE_CLOSURE_STAR_AA) : OP_CLOSURE_STAR_NA));
+        else set_optimize_op(expr, ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA));
       set_opt1_lambda_add(expr, func);
     }
   return(OPT_F);
@@ -71246,10 +71246,10 @@ static inline s7_pointer find_uncomplicated_symbol(s7_scheme *sc, s7_pointer sym
   for (; x; x = let_outlet(x))
     {
       if (let_id(x) == id)
-	return(local_slot(symbol));
+        return(local_slot(symbol));
       for (s7_pointer y = let_slots(x); tis_slot(y); y = next_slot(y))
-	if (slot_symbol(y) == symbol)
-	  return(y);
+        if (slot_symbol(y) == symbol)
+          return(y);
     }
   return(global_slot(symbol)); /* it's no longer global perhaps (local definition now inaccessible) */
 }
@@ -71257,10 +71257,10 @@ static inline s7_pointer find_uncomplicated_symbol(s7_scheme *sc, s7_pointer sym
 static bool is_ok_lambda(s7_scheme *sc, s7_pointer arg2)
 {
   return((is_pair(arg2)) &&
-	 (is_lambda(sc, car(arg2))) && /* must start (lambda ...) */
-	 (is_pair(cdr(arg2))) &&       /* must have arg(s) */
-	 (is_pair(cddr(arg2))) &&      /* must have body */
-	 (s7_is_proper_list(sc, cdddr(arg2))));
+         (is_lambda(sc, car(arg2))) && /* must start (lambda ...) */
+         (is_pair(cdr(arg2))) &&       /* must have arg(s) */
+         (is_pair(cddr(arg2))) &&      /* must have body */
+         (s7_is_proper_list(sc, cdddr(arg2))));
 }
 
 static bool hop_if_constant(s7_scheme *sc, s7_pointer sym)
@@ -71269,7 +71269,7 @@ static bool hop_if_constant(s7_scheme *sc, s7_pointer sym)
 }
 
 static opt_t optimize_c_function_one_arg(s7_scheme *sc, s7_pointer expr, s7_pointer func,
-					 int32_t hop, int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
+                                         int32_t hop, int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
 {
   s7_pointer arg1 = cadr(expr);
   bool func_is_safe = is_safe_procedure(func);
@@ -71278,25 +71278,25 @@ static opt_t optimize_c_function_one_arg(s7_scheme *sc, s7_pointer expr, s7_poin
   if (pairs == 0)
     {
       if (func_is_safe)                /* safe c function */
-	{
-	  set_safe_optimize_op(expr, hop + ((symbols == 0) ? OP_SAFE_C_NC : OP_SAFE_C_S));
-	  choose_c_function(sc, expr, func, 1);
-	  return(OPT_T);
-	}
+        {
+          set_safe_optimize_op(expr, hop + ((symbols == 0) ? OP_SAFE_C_NC : OP_SAFE_C_S));
+          choose_c_function(sc, expr, func, 1);
+          return(OPT_T);
+        }
       /* c function is not safe */
       if (symbols == 0)
-	{
-	  set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_A : OP_C_A)); /* OP_C_C never happens */
-	  fx_annotate_arg(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), 1);
-	}
+        {
+          set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_A : OP_C_A)); /* OP_C_C never happens */
+          fx_annotate_arg(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), 1);
+        }
       else
-	{
-	  set_unsafely_optimized(expr);
-	  if (c_function_call(func) == g_read)
-	    set_optimize_op(expr, hop + OP_READ_S);
-	  else set_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_S : OP_C_S));
-	}
+        {
+          set_unsafely_optimized(expr);
+          if (c_function_call(func) == g_read)
+            set_optimize_op(expr, hop + OP_READ_S);
+          else set_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_S : OP_C_S));
+        }
       choose_c_function(sc, expr, func, 1);
       return(OPT_F);
     }
@@ -71304,83 +71304,83 @@ static opt_t optimize_c_function_one_arg(s7_scheme *sc, s7_pointer expr, s7_poin
   if (bad_pairs == 0)
     {
       if (func_is_safe)
-	{
-	  int32_t op = combine_ops(sc, expr, E_C_P, arg1, NULL);
-	  /* if ((hop == 1) && (!op_has_hop(arg1))) hop = 0; *//* probably not the right way to fix this (s7test tc_or_a_and_a_a_la) */
-	  set_safe_optimize_op(expr, hop + op);
-
-	  if ((op == OP_SAFE_C_P) &&
-	      (is_fxable(sc, arg1)))
-	    {
-	      set_optimize_op(expr, hop + OP_SAFE_C_A);
-	      fx_annotate_arg(sc, cdr(expr), e);
-	    }
-	  choose_c_function(sc, expr, func, 1);
-	  return(OPT_T);
-	}
+        {
+          int32_t op = combine_ops(sc, expr, E_C_P, arg1, NULL);
+          /* if ((hop == 1) && (!op_has_hop(arg1))) hop = 0; *//* probably not the right way to fix this (s7test tc_or_a_and_a_a_la) */
+          set_safe_optimize_op(expr, hop + op);
+
+          if ((op == OP_SAFE_C_P) &&
+              (is_fxable(sc, arg1)))
+            {
+              set_optimize_op(expr, hop + OP_SAFE_C_A);
+              fx_annotate_arg(sc, cdr(expr), e);
+            }
+          choose_c_function(sc, expr, func, 1);
+          return(OPT_T);
+        }
       if (is_fxable(sc, arg1))
-	{
-	  set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_A : OP_C_A));
-	  fx_annotate_arg(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), 1);
-	  choose_c_function(sc, expr, func, 1);
-	  return(OPT_F);
-	}}
+        {
+          set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_A : OP_C_A));
+          fx_annotate_arg(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), 1);
+          choose_c_function(sc, expr, func, 1);
+          return(OPT_F);
+        }}
   else /* bad_pairs == 1 */
     {
       if (quotes == 1)
-	{
-	  fx_annotate_arg(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), 1);
-	  if (func_is_safe)
-	    {
-	      set_safe_optimize_op(expr, hop + OP_SAFE_C_A);
-	      choose_c_function(sc, expr, func, 1);
-	      return(OPT_T);
-	    }
-	  set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_A : OP_C_A));
-	  choose_c_function(sc, expr, func, 1);
-	  return(OPT_F);
-	}
+        {
+          fx_annotate_arg(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), 1);
+          if (func_is_safe)
+            {
+              set_safe_optimize_op(expr, hop + OP_SAFE_C_A);
+              choose_c_function(sc, expr, func, 1);
+              return(OPT_T);
+            }
+          set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_A : OP_C_A));
+          choose_c_function(sc, expr, func, 1);
+          return(OPT_F);
+        }
       /* quotes == 0 */
       if (!func_is_safe)
-	{
-	  s7_pointer lambda_expr = arg1;
-	  if ((is_ok_lambda(sc, lambda_expr)) &&
-	      (!direct_memq(car(lambda_expr), e)))            /* (let ((lambda #f)) (call-with-exit (lambda ...))) */
-	    {
-	      if (((c_function_call(func) == g_call_with_exit) ||
-		   (c_function_call(func) == g_call_cc) ||
-		   (c_function_call(func) == g_call_with_output_string)) &&
-		  (is_proper_list_1(sc, cadr(lambda_expr))) &&
-		  (is_symbol(caadr(lambda_expr))) &&
-		  (!is_probably_constant(caadr(lambda_expr)))) /* (call-with-exit (lambda (pi) ...) */
-		{
-		  if (c_function_call(func) == g_call_cc)
-		    set_unsafe_optimize_op(expr, OP_CALL_CC);
-		  else
-		    if (c_function_call(func) == g_call_with_exit)
-		      set_unsafe_optimize_op(expr, (is_null(cdddr(lambda_expr))) ? OP_CALL_WITH_EXIT_O : OP_CALL_WITH_EXIT);
-		    else
-		      {
-			set_unsafe_optimize_op(expr, OP_CALL_WITH_OUTPUT_STRING);
-			set_opt2_pair(expr, cddr(lambda_expr));
-			set_opt3_sym(expr, caadr(lambda_expr));
-			set_local(caadr(lambda_expr));
-			return(OPT_F);
-		      }
-		  choose_c_function(sc, expr, func, 1);
-		  set_opt2_pair(expr, cdr(lambda_expr));
-		  set_local(caadr(lambda_expr)); /* check_lambda_args normally handles this, but if hop==1, we'll skip that step */
-		  return(OPT_F);
-		}
-	      if ((c_function_call(func) == g_with_output_to_string) &&
-		  (is_null(cadr(lambda_expr))))
-		{
-		  set_unsafe_optimize_op(expr, OP_WITH_OUTPUT_TO_STRING);
-		  set_opt2_pair(expr, cddr(lambda_expr));
-		  return(OPT_F);
-		}}}}
+        {
+          s7_pointer lambda_expr = arg1;
+          if ((is_ok_lambda(sc, lambda_expr)) &&
+              (!direct_memq(car(lambda_expr), e)))            /* (let ((lambda #f)) (call-with-exit (lambda ...))) */
+            {
+              if (((c_function_call(func) == g_call_with_exit) ||
+                   (c_function_call(func) == g_call_cc) ||
+                   (c_function_call(func) == g_call_with_output_string)) &&
+                  (is_proper_list_1(sc, cadr(lambda_expr))) &&
+                  (is_symbol(caadr(lambda_expr))) &&
+                  (!is_probably_constant(caadr(lambda_expr)))) /* (call-with-exit (lambda (pi) ...) */
+                {
+                  if (c_function_call(func) == g_call_cc)
+                    set_unsafe_optimize_op(expr, OP_CALL_CC);
+                  else
+                    if (c_function_call(func) == g_call_with_exit)
+                      set_unsafe_optimize_op(expr, (is_null(cdddr(lambda_expr))) ? OP_CALL_WITH_EXIT_O : OP_CALL_WITH_EXIT);
+                    else
+                      {
+                        set_unsafe_optimize_op(expr, OP_CALL_WITH_OUTPUT_STRING);
+                        set_opt2_pair(expr, cddr(lambda_expr));
+                        set_opt3_sym(expr, caadr(lambda_expr));
+                        set_local(caadr(lambda_expr));
+                        return(OPT_F);
+                      }
+                  choose_c_function(sc, expr, func, 1);
+                  set_opt2_pair(expr, cdr(lambda_expr));
+                  set_local(caadr(lambda_expr)); /* check_lambda_args normally handles this, but if hop==1, we'll skip that step */
+                  return(OPT_F);
+                }
+              if ((c_function_call(func) == g_with_output_to_string) &&
+                  (is_null(cadr(lambda_expr))))
+                {
+                  set_unsafe_optimize_op(expr, OP_WITH_OUTPUT_TO_STRING);
+                  set_opt2_pair(expr, cddr(lambda_expr));
+                  return(OPT_F);
+                }}}}
   set_unsafe_optimize_op(expr, hop + ((func_is_safe) ? OP_SAFE_C_P : OP_C_P));
   choose_c_function(sc, expr, func, 1);
   return(OPT_F);
@@ -71392,15 +71392,15 @@ static bool walk_fxable(s7_scheme *sc, s7_pointer tree)
     {
       s7_pointer q = car(p);
       if ((is_pair(q)) &&
-	  (is_optimized(q)))
-	{
-	  opcode_t op = optimize_op(q);
-	  if (is_safe_c_op(op)) return(true);
-	  if ((op >= OP_TC_AND_A_OR_A_LA) ||
-	      ((op >= OP_THUNK) && (op < OP_BEGIN)) ||
-	      (!walk_fxable(sc, q)))
-	    return(false);
-	}}
+          (is_optimized(q)))
+        {
+          opcode_t op = optimize_op(q);
+          if (is_safe_c_op(op)) return(true);
+          if ((op >= OP_TC_AND_A_OR_A_LA) ||
+              ((op >= OP_THUNK) && (op < OP_BEGIN)) ||
+              (!walk_fxable(sc, q)))
+            return(false);
+        }}
   return(true);
 }
 
@@ -71410,8 +71410,8 @@ static bool is_safe_fxable(s7_scheme *sc, s7_pointer p)
   if (is_optimized(p))
     {
       if ((fx_function[optimize_op(p)]) &&
-	  (walk_fxable(sc, (p))))
-	return(true);
+          (walk_fxable(sc, (p))))
+        return(true);
     }
   if (is_proper_quote(sc, p)) return(true);
   if ((S7_DEBUGGING) && (is_optimized(p)) && (fx_function[optimize_op(p)])) fprintf(stderr, "omit %s: %s\n", op_names[optimize_op(p)], display(p));
@@ -71427,23 +71427,23 @@ static opt_t fxify_closure_s(s7_scheme *sc, s7_pointer func, s7_pointer expr, s7
   if ((is_pair(car(body))) && (is_pair(cdar(body))) && (car(closure_args(func)) == cadar(body)))
     {
       if (optimize_op(car(body)) == HOP_SAFE_C_S)
-	set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_S_TO_S);
+        set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_S_TO_S);
       else
-	if (optimize_op(car(body)) == HOP_SAFE_C_SC)
-	  {
-	    s7_pointer body_arg2 = caddar(body);
-	    set_opt3_con(cdr(expr), (is_pair(body_arg2)) ? cadr(body_arg2) : body_arg2);
-	    set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_S_TO_SC);
-	    if ((caar(body) == sc->vector_ref_symbol) && (is_global(sc->vector_ref_symbol)))
-	      set_fx_direct(cdr(expr), fx_safe_closure_s_to_vref);
-	    else
-	      {
-		set_fx_direct(cdr(expr), fx_safe_closure_s_to_sc);
-		if ((is_t_integer(body_arg2)) && (integer(body_arg2) == 1))
-		  {
-		    if (caar(body) == sc->subtract_symbol) set_fx_direct(cdr(expr), fx_safe_closure_s_to_sub1);
-		    if (caar(body) == sc->add_symbol) set_fx_direct(cdr(expr), fx_safe_closure_s_to_add1);
-		  }}}}
+        if (optimize_op(car(body)) == HOP_SAFE_C_SC)
+          {
+            s7_pointer body_arg2 = caddar(body);
+            set_opt3_con(cdr(expr), (is_pair(body_arg2)) ? cadr(body_arg2) : body_arg2);
+            set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_S_TO_SC);
+            if ((caar(body) == sc->vector_ref_symbol) && (is_global(sc->vector_ref_symbol)))
+              set_fx_direct(cdr(expr), fx_safe_closure_s_to_vref);
+            else
+              {
+                set_fx_direct(cdr(expr), fx_safe_closure_s_to_sc);
+                if ((is_t_integer(body_arg2)) && (integer(body_arg2) == 1))
+                  {
+                    if (caar(body) == sc->subtract_symbol) set_fx_direct(cdr(expr), fx_safe_closure_s_to_sub1);
+                    if (caar(body) == sc->add_symbol) set_fx_direct(cdr(expr), fx_safe_closure_s_to_add1);
+                  }}}}
   set_closure_one_form_fx_arg(func);
   fx_tree(sc, body, car(closure_args(func)), NULL, NULL, false);
   return(OPT_T);
@@ -71458,29 +71458,29 @@ static bool fxify_closure_a(s7_scheme *sc, s7_pointer func, bool one_form, bool
       set_optimize_op(expr, hop + OP_CLOSURE_A_O);
     else
       {
-	s7_pointer body = closure_body(func);
-	if (!is_fxable(sc, car(body)))
-	  set_optimize_op(expr, hop + OP_SAFE_CLOSURE_A_O);
-	else
-	  {
-	    fx_annotate_arg(sc, body, e);
-	    set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_A_A);
-	    if ((is_pair(car(body))) &&
-		(optimize_op(car(body)) == HOP_SAFE_C_SC) &&
-		(car(closure_args(func)) == cadar(body)))
-	      {
-		s7_pointer body_arg2 = caddar(body);
-		set_opt3_con(cdr(expr), (is_pair(body_arg2)) ? cadr(body_arg2) : body_arg2);
-		set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_A_TO_SC);
-		/* why is this setting expr whereas _s case above sets cdr(expr)? */
-		if ((caar(body) == sc->vector_ref_symbol) && (is_global(sc->vector_ref_symbol)))
-		  set_fx_direct(expr, fx_safe_closure_a_to_vref);
-		else set_fx_direct(expr, fx_safe_closure_a_to_sc);
-	      }
-	    set_closure_one_form_fx_arg(func);
-	    fx_tree(sc, body, car(closure_args(func)), NULL, NULL, false);
-	    return(true);
-	  }}
+        s7_pointer body = closure_body(func);
+        if (!is_fxable(sc, car(body)))
+          set_optimize_op(expr, hop + OP_SAFE_CLOSURE_A_O);
+        else
+          {
+            fx_annotate_arg(sc, body, e);
+            set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_A_A);
+            if ((is_pair(car(body))) &&
+                (optimize_op(car(body)) == HOP_SAFE_C_SC) &&
+                (car(closure_args(func)) == cadar(body)))
+              {
+                s7_pointer body_arg2 = caddar(body);
+                set_opt3_con(cdr(expr), (is_pair(body_arg2)) ? cadr(body_arg2) : body_arg2);
+                set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_A_TO_SC);
+                /* why is this setting expr whereas _s case above sets cdr(expr)? */
+                if ((caar(body) == sc->vector_ref_symbol) && (is_global(sc->vector_ref_symbol)))
+                  set_fx_direct(expr, fx_safe_closure_a_to_vref);
+                else set_fx_direct(expr, fx_safe_closure_a_to_sc);
+              }
+            set_closure_one_form_fx_arg(func);
+            fx_tree(sc, body, car(closure_args(func)), NULL, NULL, false);
+            return(true);
+          }}
   return(false);
 }
 
@@ -71495,10 +71495,10 @@ static opt_t optimize_closure_sym(s7_scheme *sc, s7_pointer expr, s7_pointer fun
     {
       s7_pointer body = closure_body(func);
       if (!has_fx(body)) /* does this have any effect? */
-	{
-	  fx_annotate_args(sc, body, e);
-	  fx_tree(sc, body, closure_args(func), NULL, NULL, false);
-	}
+        {
+          fx_annotate_args(sc, body, e);
+          fx_tree(sc, body, closure_args(func), NULL, NULL, false);
+        }
       set_safe_optimize_op(expr, hop + OP_ANY_CLOSURE_SYM);
       return(OPT_T);
     }
@@ -71516,10 +71516,10 @@ static opt_t optimize_closure_a_sym(s7_scheme *sc, s7_pointer expr, s7_pointer f
     {
       s7_pointer body = closure_body(func);
       if (!has_fx(body)) /* does this have any effect? */
-	{
-	  fx_annotate_args(sc, body, e);
-	  fx_tree(sc, body, car(closure_args(func)), cdr(closure_args(func)), NULL, false);
-	}
+        {
+          fx_annotate_args(sc, body, e);
+          fx_tree(sc, body, car(closure_args(func)), cdr(closure_args(func)), NULL, false);
+        }
       set_safe_optimize_op(expr, hop + OP_ANY_CLOSURE_A_SYM);
       return(OPT_T);
     }
@@ -71535,9 +71535,9 @@ static opt_t optimize_closure_one_arg(s7_scheme *sc, s7_pointer expr, s7_pointer
   if (arit != 1)
     {
       if (is_symbol(closure_args(func))) /* (arit == -1) is ambiguous: (define (f . a)...) and (define (f a . b)...) both are -1 here */
-	return(optimize_closure_sym(sc, expr, func, hop, 1, e));
+        return(optimize_closure_sym(sc, expr, func, hop, 1, e));
       if ((arit == -1) && (is_symbol(cdr(closure_args(func)))))
-	return(optimize_closure_a_sym(sc, expr, func, hop, 1, e));
+        return(optimize_closure_a_sym(sc, expr, func, hop, 1, e));
       return(OPT_F);
     }
   safe_case = is_safe_closure(func);
@@ -71550,15 +71550,15 @@ static opt_t optimize_closure_one_arg(s7_scheme *sc, s7_pointer expr, s7_pointer
       set_opt2_sym(expr, arg1);
       set_opt1_lambda_add(expr, func);
       if (one_form)
-	{
-	  if (safe_case)
-	    {
-	      if (is_fxable(sc, car(body)))
-		return(fxify_closure_s(sc, func, expr, e, hop));
-	      set_optimize_op(expr, hop + OP_SAFE_CLOSURE_S_O); /* tleft 7638 if _O here, 7692 if not (and claims 80 in the begin setup) */
-	    }
-	  else set_optimize_op(expr, hop + OP_CLOSURE_S_O);
-	}
+        {
+          if (safe_case)
+            {
+              if (is_fxable(sc, car(body)))
+                return(fxify_closure_s(sc, func, expr, e, hop));
+              set_optimize_op(expr, hop + OP_SAFE_CLOSURE_S_O); /* tleft 7638 if _O here, 7692 if not (and claims 80 in the begin setup) */
+            }
+          else set_optimize_op(expr, hop + OP_CLOSURE_S_O);
+        }
       else set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_S : OP_CLOSURE_S));
       set_unsafely_optimized(expr);
       return(OPT_F);
@@ -71586,20 +71586,20 @@ static opt_t optimize_closure_one_arg(s7_scheme *sc, s7_pointer expr, s7_pointer
 }
 
 static opt_t optimize_func_one_arg(s7_scheme *sc, s7_pointer expr, s7_pointer func,
-				   int32_t hop, int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
+                                   int32_t hop, int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
 {
   s7_pointer arg1;
   if (SHOW_EVAL_OPS) fprintf(stderr, "  %s[%d]: expr: %s, func: %s, hop: %d, pairs: %d, symbols: %d, quotes: %d, bad_pairs: %d, e: %s\n",
-			     __func__, __LINE__, display_truncated(expr), display(func), hop, pairs, symbols, quotes, bad_pairs, display_truncated(e));
+                             __func__, __LINE__, display_truncated(expr), display(func), hop, pairs, symbols, quotes, bad_pairs, display_truncated(e));
   /* very often, expr is already optimized, quoted stuff is counted under "bad_pairs"! as well as quotes */
   if (quotes > 0)
     {
       if (direct_memq(sc->quote_symbol, e))
-	return(OPT_OOPS);
+        return(OPT_OOPS);
       if ((bad_pairs == quotes) &&
-	  (is_symbol(car(expr))) &&
-	  (is_constant_symbol(sc, car(expr))))
-	hop = 1;
+          (is_symbol(car(expr))) &&
+          (is_constant_symbol(sc, car(expr))))
+        hop = 1;
     }
   arg1 = cadr(expr);
   /* need in_with_let -> search only rootlet not lookup */
@@ -71608,10 +71608,10 @@ static opt_t optimize_func_one_arg(s7_scheme *sc, s7_pointer expr, s7_pointer fu
     {
       /* wrap the bad arg in a check symbol lookup */
       if (s7_is_aritable(sc, func, 1))
-	{
-	  set_fx_direct(cdr(expr), fx_unsafe_s);
-	  return(wrap_bad_args(sc, func, expr, 1, hop, e));
-	}
+        {
+          set_fx_direct(cdr(expr), fx_unsafe_s);
+          return(wrap_bad_args(sc, func, expr, 1, hop, e));
+        }
       return(OPT_F);
     }
 
@@ -71627,80 +71627,80 @@ static opt_t optimize_func_one_arg(s7_scheme *sc, s7_pointer expr, s7_pointer fu
 
     case T_CLOSURE_STAR:
       if (is_null(closure_args(func)))
-	return(OPT_F);
+        return(OPT_F);
       if (fx_count(sc, expr) == 1)
-	{
-	  bool safe_case = is_safe_closure(func);
-	  if (is_immutable(func)) hop = 1;
-	  fx_annotate_arg(sc, cdr(expr), e);
-	  set_opt1_lambda_add(expr, func);
-	  set_opt3_arglen(cdr(expr), 1);
-	  set_unsafely_optimized(expr);
-
-	  if ((safe_case) && (is_null(cdr(closure_args(func)))))
-	    set_optimize_op(expr, hop + OP_SAFE_CLOSURE_STAR_A1);
-	  else
-	    if (lambda_has_simple_defaults(func))
-	      {
-		if (arglist_has_rest(sc, closure_args(func)))
-		  set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_1 : OP_CLOSURE_STAR_NA));
-		else set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_A : OP_CLOSURE_STAR_A));
-	      }
-	    else set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_1 : OP_CLOSURE_STAR_NA));
-	}
+        {
+          bool safe_case = is_safe_closure(func);
+          if (is_immutable(func)) hop = 1;
+          fx_annotate_arg(sc, cdr(expr), e);
+          set_opt1_lambda_add(expr, func);
+          set_opt3_arglen(cdr(expr), 1);
+          set_unsafely_optimized(expr);
+
+          if ((safe_case) && (is_null(cdr(closure_args(func)))))
+            set_optimize_op(expr, hop + OP_SAFE_CLOSURE_STAR_A1);
+          else
+            if (lambda_has_simple_defaults(func))
+              {
+                if (arglist_has_rest(sc, closure_args(func)))
+                  set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_1 : OP_CLOSURE_STAR_NA));
+                else set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_A : OP_CLOSURE_STAR_A));
+              }
+            else set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_1 : OP_CLOSURE_STAR_NA));
+        }
       return(OPT_F);
 
       case T_C_FUNCTION_STAR:
-	if ((fx_count(sc, expr) == 1) &&
-	    (c_function_max_args(func) >= 1) &&
-	    (!is_symbol_and_keyword(arg1)))           /* the only arg should not be a keyword (needs error checks later) */
-	  {
-	    if ((hop == 0) && ((is_immutable(func)) || ((!sc->in_with_let) && (symbol_id(car(expr)) == 0)))) hop = 1;
-	    set_safe_optimize_op(expr, hop + OP_SAFE_C_STAR_A);
-	    fx_annotate_arg(sc, cdr(expr), e);
-	    set_opt3_arglen(cdr(expr), 1);
-	    set_c_function(expr, func);
-	    return(OPT_T);
-	  }
-	break;
+        if ((fx_count(sc, expr) == 1) &&
+            (c_function_max_args(func) >= 1) &&
+            (!is_symbol_and_keyword(arg1)))           /* the only arg should not be a keyword (needs error checks later) */
+          {
+            if ((hop == 0) && ((is_immutable(func)) || ((!sc->in_with_let) && (symbol_id(car(expr)) == 0)))) hop = 1;
+            set_safe_optimize_op(expr, hop + OP_SAFE_C_STAR_A);
+            fx_annotate_arg(sc, cdr(expr), e);
+            set_opt3_arglen(cdr(expr), 1);
+            set_c_function(expr, func);
+            return(OPT_T);
+          }
+        break;
 
     case T_PAIR: case T_VECTOR: case T_INT_VECTOR: case T_BYTE_VECTOR: case T_FLOAT_VECTOR:
       if (is_fxable(sc, arg1))
-	{
-	  set_unsafe_optimize_op(expr, (is_pair(func) ? OP_IMPLICIT_PAIR_REF_A : OP_IMPLICIT_VECTOR_REF_A));
-	  fx_annotate_arg(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), 1);
-	  return(OPT_T);
-	}
+        {
+          set_unsafe_optimize_op(expr, (is_pair(func) ? OP_IMPLICIT_PAIR_REF_A : OP_IMPLICIT_VECTOR_REF_A));
+          fx_annotate_arg(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), 1);
+          return(OPT_T);
+        }
       break;
 
     case T_LET:
       if (((quotes == 1) && (is_symbol(cadr(arg1)))) || /* (e 'a) or (e ':a) */
-	  (is_symbol_and_keyword(arg1)))                /* (e :a) */
-	{
-	  s7_pointer sym = (quotes == 1) ? cadr(arg1) : arg1;
-	  if (is_keyword(sym)) sym = keyword_symbol(sym);
-	  if (func == sc->s7_starlet)                   /* (*s7* ...), sc->s7_starlet is a let */
-	    {
-	      set_safe_optimize_op(expr, OP_IMPLICIT_S7_STARLET_REF_S);
-	      set_opt3_int(expr, s7_starlet_symbol(sym));
-	      return(OPT_T);
-	    }
-	  set_opt3_con(expr, sym);
-	  set_unsafe_optimize_op(expr, OP_IMPLICIT_LET_REF_C);
-	  return(OPT_T);
-	}
+          (is_symbol_and_keyword(arg1)))                /* (e :a) */
+        {
+          s7_pointer sym = (quotes == 1) ? cadr(arg1) : arg1;
+          if (is_keyword(sym)) sym = keyword_symbol(sym);
+          if (func == sc->s7_starlet)                   /* (*s7* ...), sc->s7_starlet is a let */
+            {
+              set_safe_optimize_op(expr, OP_IMPLICIT_S7_STARLET_REF_S);
+              set_opt3_int(expr, s7_starlet_symbol(sym));
+              return(OPT_T);
+            }
+          set_opt3_con(expr, sym);
+          set_unsafe_optimize_op(expr, OP_IMPLICIT_LET_REF_C);
+          return(OPT_T);
+        }
       /* fall through */
 
     case T_HASH_TABLE: case T_C_OBJECT:
       if (is_fxable(sc, arg1))
-	{
-	  set_unsafe_optimize_op(expr, (type(func) == T_LET) ? OP_IMPLICIT_LET_REF_A :
-				 ((type(func) == T_HASH_TABLE) ? OP_IMPLICIT_HASH_TABLE_REF_A : OP_IMPLICIT_C_OBJECT_REF_A));
-	  fx_annotate_arg(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), 1);
-	  return(OPT_T);
-	}
+        {
+          set_unsafe_optimize_op(expr, (type(func) == T_LET) ? OP_IMPLICIT_LET_REF_A :
+                                 ((type(func) == T_HASH_TABLE) ? OP_IMPLICIT_HASH_TABLE_REF_A : OP_IMPLICIT_C_OBJECT_REF_A));
+          fx_annotate_arg(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), 1);
+          return(OPT_T);
+        }
       break;
 
     default:
@@ -71736,9 +71736,9 @@ static bool two_args_ok(s7_scheme *sc, s7_pointer expr, s7_pointer e)
 static void opt_sp_1(s7_scheme *sc, s7_function g, s7_pointer expr)
 {
   set_opt1_any(cdr(expr),
-	       (s7_pointer)((intptr_t)((g == g_cons) ? OP_SAFE_CONS_SP_1 :
-				       (((g == g_multiply) || (g == g_multiply_2)) ? OP_SAFE_MULTIPLY_SP_1 :
-					(((g == g_add) || (g == g_add_2)) ? OP_SAFE_ADD_SP_1 : OP_SAFE_C_SP_1)))));
+               (s7_pointer)((intptr_t)((g == g_cons) ? OP_SAFE_CONS_SP_1 :
+                                       (((g == g_multiply) || (g == g_multiply_2)) ? OP_SAFE_MULTIPLY_SP_1 :
+                                        (((g == g_add) || (g == g_add_2)) ? OP_SAFE_ADD_SP_1 : OP_SAFE_C_SP_1)))));
 }
 
 static opt_t set_any_c_np(s7_scheme *sc, s7_pointer func, s7_pointer expr, s7_pointer e, int32_t num_args, opcode_t op)
@@ -71780,26 +71780,26 @@ static void fixup_closure_star_aa(s7_scheme *sc, s7_pointer f, s7_pointer code,
   else
     if ((lambda_has_simple_defaults(f)) && (arity == 2))
       set_optimize_op(code, hop + ((is_safe_closure(f)) ? ((is_null(cdr(closure_body(f)))) ? OP_SAFE_CLOSURE_STAR_AA_O :
-							   OP_SAFE_CLOSURE_STAR_AA) : OP_CLOSURE_STAR_NA));
+                                                           OP_SAFE_CLOSURE_STAR_AA) : OP_CLOSURE_STAR_NA));
     else set_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_STAR_NA_2 : OP_CLOSURE_STAR_NA));
 }
 
 static int32_t check_lambda(s7_scheme *sc, s7_pointer form, bool optl);
 
 static opt_t optimize_func_two_args(s7_scheme *sc, s7_pointer expr, s7_pointer func, int32_t hop,
-				    int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
+                                    int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
 {
   s7_pointer arg1 = cadr(expr), arg2 = caddr(expr);
   if (SHOW_EVAL_OPS) fprintf(stderr, "  %s[%d]: expr: %s, func: %s, hop: %d, pairs: %d, symbols: %d, quotes: %d, bad_pairs: %d, e: %s\n",
-			     __func__, __LINE__, display_truncated(expr), display(func), hop, pairs, symbols, quotes, bad_pairs, display_truncated(e));
+                             __func__, __LINE__, display_truncated(expr), display(func), hop, pairs, symbols, quotes, bad_pairs, display_truncated(e));
   if (quotes > 0)
     {
       if (direct_memq(sc->quote_symbol, e))
-	return(OPT_OOPS);
+        return(OPT_OOPS);
       if ((bad_pairs == quotes) &&
-	  (is_symbol(car(expr))) &&
-	  (is_constant_symbol(sc, car(expr))))
-	hop = 1;
+          (is_symbol(car(expr))) &&
+          (is_constant_symbol(sc, car(expr))))
+        hop = 1;
     }
   if (((is_symbol(arg1)) &&
        (!arg_findable(sc, arg1, e))) ||
@@ -71808,12 +71808,12 @@ static opt_t optimize_func_two_args(s7_scheme *sc, s7_pointer expr, s7_pointer f
     {
       /* wrap bad args */
       if ((is_fxable(sc, arg1)) &&
-	  (is_fxable(sc, arg2)) &&
-	  (s7_is_aritable(sc, func, 2))) /* arg_findable key -> #t(?) so clo* ok */
-	{
-	  fx_annotate_args(sc, cdr(expr), e);
-	  return(wrap_bad_args(sc, func, expr, 2, hop, e));
-	}
+          (is_fxable(sc, arg2)) &&
+          (s7_is_aritable(sc, func, 2))) /* arg_findable key -> #t(?) so clo* ok */
+        {
+          fx_annotate_args(sc, cdr(expr), e);
+          return(wrap_bad_args(sc, func, expr, 2, hop, e));
+        }
       return(OPT_F);
     }
   /* end of bad symbol wrappers */
@@ -71825,435 +71825,435 @@ static opt_t optimize_func_two_args(s7_scheme *sc, s7_pointer expr, s7_pointer f
       if (hop == 0) hop = hop_if_constant(sc, car(expr));
 
       if (pairs == 0)
-	{
-	  if ((func_is_safe) ||
-	      ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
-	    {
-	      /* another case here: set-car! and set-cdr! are safe if symbols==1 and arg1 is the symbol (i.e. arg2 is a constant) */
-	      if (symbols == 0)
-		set_optimize_op(expr, hop + OP_SAFE_C_NC);
-	      else
-		if (symbols == 2) /* these two symbols are almost never the same, (sqrt (+ (* x x) (* y y))) */
-		  {
-		    set_optimize_op(expr, hop + OP_SAFE_C_SS);
-		    set_opt2_sym(cdr(expr), arg2);
-		  }
-		else
-		  if (is_normal_symbol(arg1))
-		    {
-		      set_opt2_con(cdr(expr), arg2);
-		      set_optimize_op(expr, hop + OP_SAFE_C_SC);
-		    }
-		  else
-		    {
-		      set_opt1_con(cdr(expr), arg1);
-		      set_opt2_sym(cdr(expr), arg2);
-		      set_optimize_op(expr, hop + OP_SAFE_C_CS);
-		    }
-	      set_optimized(expr);
-	      choose_c_function(sc, expr, func, 2);
-	      return(OPT_T);
-	    }
-
-	  set_unsafely_optimized(expr);
-	  if (symbols == 2)
-	    {
-	      if (c_function_call(func) == g_apply)
-		{
-		  set_optimize_op(expr, OP_APPLY_SS);
-		  set_opt1_cfunc(expr, func); /* not quite set_c_function */
-		  set_opt2_sym(expr, arg2);
-		}
-	      else
-		{
-		  if (is_semisafe(func))
-		    {
-		      set_opt2_sym(cdr(expr), arg2);
-		      set_optimize_op(expr, hop + OP_CL_SS);
-		    }
-		  else set_optimize_op(expr, hop + OP_C_SS);
-		  choose_c_function(sc, expr, func, 2);
-		}}
-	  else
-	    {
-	      set_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA :
-					   (((symbols == 0) && (pairs == 0) && (car(expr) == sc->values_symbol)) ? OP_C_NC : OP_C_AA)));
-	      fx_annotate_args(sc, cdr(expr), e);
-	      set_opt3_arglen(cdr(expr), 2);
-	      choose_c_function(sc, expr, func, 2);
-	      if (is_safe_procedure(opt1_cfunc(expr)))
-		{
-		  clear_unsafe(expr);
-		  /* symbols can be 0..2 here, no pairs */
-		  set_optimized(expr);
-		  if (symbols == 1)
-		    {
-		      if (is_normal_symbol(arg1))
-			{
-			  set_optimize_op(expr, hop + OP_SAFE_C_SC);
-			  set_opt2_con(cdr(expr), arg2);
-			}
-		      else
-			{
-			  set_opt1_con(cdr(expr), arg1);
-			  set_opt2_sym(cdr(expr), arg2);
-			  set_optimize_op(expr, hop + OP_SAFE_C_CS);
-			}}
-		  return(OPT_T);
-		}}
-	  return(OPT_F);
-	}
+        {
+          if ((func_is_safe) ||
+              ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
+            {
+              /* another case here: set-car! and set-cdr! are safe if symbols==1 and arg1 is the symbol (i.e. arg2 is a constant) */
+              if (symbols == 0)
+                set_optimize_op(expr, hop + OP_SAFE_C_NC);
+              else
+                if (symbols == 2) /* these two symbols are almost never the same, (sqrt (+ (* x x) (* y y))) */
+                  {
+                    set_optimize_op(expr, hop + OP_SAFE_C_SS);
+                    set_opt2_sym(cdr(expr), arg2);
+                  }
+                else
+                  if (is_normal_symbol(arg1))
+                    {
+                      set_opt2_con(cdr(expr), arg2);
+                      set_optimize_op(expr, hop + OP_SAFE_C_SC);
+                    }
+                  else
+                    {
+                      set_opt1_con(cdr(expr), arg1);
+                      set_opt2_sym(cdr(expr), arg2);
+                      set_optimize_op(expr, hop + OP_SAFE_C_CS);
+                    }
+              set_optimized(expr);
+              choose_c_function(sc, expr, func, 2);
+              return(OPT_T);
+            }
+
+          set_unsafely_optimized(expr);
+          if (symbols == 2)
+            {
+              if (c_function_call(func) == g_apply)
+                {
+                  set_optimize_op(expr, OP_APPLY_SS);
+                  set_opt1_cfunc(expr, func); /* not quite set_c_function */
+                  set_opt2_sym(expr, arg2);
+                }
+              else
+                {
+                  if (is_semisafe(func))
+                    {
+                      set_opt2_sym(cdr(expr), arg2);
+                      set_optimize_op(expr, hop + OP_CL_SS);
+                    }
+                  else set_optimize_op(expr, hop + OP_C_SS);
+                  choose_c_function(sc, expr, func, 2);
+                }}
+          else
+            {
+              set_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA :
+                                           (((symbols == 0) && (pairs == 0) && (car(expr) == sc->values_symbol)) ? OP_C_NC : OP_C_AA)));
+              fx_annotate_args(sc, cdr(expr), e);
+              set_opt3_arglen(cdr(expr), 2);
+              choose_c_function(sc, expr, func, 2);
+              if (is_safe_procedure(opt1_cfunc(expr)))
+                {
+                  clear_unsafe(expr);
+                  /* symbols can be 0..2 here, no pairs */
+                  set_optimized(expr);
+                  if (symbols == 1)
+                    {
+                      if (is_normal_symbol(arg1))
+                        {
+                          set_optimize_op(expr, hop + OP_SAFE_C_SC);
+                          set_opt2_con(cdr(expr), arg2);
+                        }
+                      else
+                        {
+                          set_opt1_con(cdr(expr), arg1);
+                          set_opt2_sym(cdr(expr), arg2);
+                          set_optimize_op(expr, hop + OP_SAFE_C_CS);
+                        }}
+                  return(OPT_T);
+                }}
+          return(OPT_F);
+        }
 
       /* pairs != 0 */
       if ((bad_pairs == 0) &&
-	  (pairs == 2))
-	{
-	  if ((func_is_safe) ||
-	      ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
-	    {
-	      int32_t op = combine_ops(sc, expr, E_C_PP, arg1, arg2);
-	      set_safe_optimize_op(expr, hop + op);
-	      if (op == OP_SAFE_C_PP)
-		{
-		  if (((op_no_hop(cadr(expr))) == OP_SAFE_CLOSURE_S_TO_SC) &&
-		      ((op_no_hop(caddr(expr))) == OP_SAFE_CLOSURE_S_TO_SC) &&
-		      (is_global(caadr(expr))) && (is_global(caaddr(expr))))
-		    {
-		      /* ideally this would be OP not HOP, but safe_closure_s_to_sc is too picky */
-		      /* set_opt3_pair(expr, caddr(expr)); */ /* set_opt3_arglen(cdr(expr), 2); */
-		      set_safe_optimize_op(expr, HOP_SAFE_C_FF);
-		    }
-
-		  opt_sp_1(sc, c_function_call(func), expr); /* calls set_opt1_any, sets opt1(cdr(expr)) to OP_SAFE_CONS_SP_1 and friends */
-		  if (is_fxable(sc, arg1))
-		    {
-		      if (is_fxable(sc, arg2))
-			return(check_c_aa(sc, expr, func, hop, e)); /* AA case */
-		      set_optimize_op(expr, hop + OP_SAFE_C_AP);
-		      fx_annotate_arg(sc, cdr(expr), e);
-		      set_opt3_arglen(cdr(expr), 2);
-		    }
-		  else
-		    if (is_fxable(sc, arg2))
-		      {
-			set_optimize_op(expr, hop + OP_SAFE_C_PA);
-			fx_annotate_arg(sc, cddr(expr), e);
-			set_opt3_arglen(cdr(expr), 2);
-		      }}
-	      choose_c_function(sc, expr, func, 2); /* this might change the op to safe_c_c, so it has to be last */
-	      return(OPT_T);
-	    }}
+          (pairs == 2))
+        {
+          if ((func_is_safe) ||
+              ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
+            {
+              int32_t op = combine_ops(sc, expr, E_C_PP, arg1, arg2);
+              set_safe_optimize_op(expr, hop + op);
+              if (op == OP_SAFE_C_PP)
+                {
+                  if (((op_no_hop(cadr(expr))) == OP_SAFE_CLOSURE_S_TO_SC) &&
+                      ((op_no_hop(caddr(expr))) == OP_SAFE_CLOSURE_S_TO_SC) &&
+                      (is_global(caadr(expr))) && (is_global(caaddr(expr))))
+                    {
+                      /* ideally this would be OP not HOP, but safe_closure_s_to_sc is too picky */
+                      /* set_opt3_pair(expr, caddr(expr)); */ /* set_opt3_arglen(cdr(expr), 2); */
+                      set_safe_optimize_op(expr, HOP_SAFE_C_FF);
+                    }
+
+                  opt_sp_1(sc, c_function_call(func), expr); /* calls set_opt1_any, sets opt1(cdr(expr)) to OP_SAFE_CONS_SP_1 and friends */
+                  if (is_fxable(sc, arg1))
+                    {
+                      if (is_fxable(sc, arg2))
+                        return(check_c_aa(sc, expr, func, hop, e)); /* AA case */
+                      set_optimize_op(expr, hop + OP_SAFE_C_AP);
+                      fx_annotate_arg(sc, cdr(expr), e);
+                      set_opt3_arglen(cdr(expr), 2);
+                    }
+                  else
+                    if (is_fxable(sc, arg2))
+                      {
+                        set_optimize_op(expr, hop + OP_SAFE_C_PA);
+                        fx_annotate_arg(sc, cddr(expr), e);
+                        set_opt3_arglen(cdr(expr), 2);
+                      }}
+              choose_c_function(sc, expr, func, 2); /* this might change the op to safe_c_c, so it has to be last */
+              return(OPT_T);
+            }}
 
       if ((bad_pairs == 0) &&
-	  (pairs == 1))
-	{
-	  if ((func_is_safe) ||
-	      ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
-	    {
-	      combine_op_t orig_op;
-	      int32_t op;
-
-	      if (is_pair(arg1))
-		{
-		  orig_op = (is_normal_symbol(arg2)) ? E_C_PS : E_C_PC;
-		  op = combine_ops(sc, expr, orig_op, arg1, arg2);
-		}
-	      else
-		{
-		  orig_op = (is_normal_symbol(arg1)) ? E_C_SP : E_C_CP;
-		  op = combine_ops(sc, expr, orig_op, arg1, arg2);
-		}
-	      if ((((op == OP_SAFE_C_SP) || (op == OP_SAFE_C_CP)) &&
-		   (is_fxable(sc, arg2))) ||
-		  (((op == OP_SAFE_C_PS) || (op == OP_SAFE_C_PC)) &&
-		   (is_fxable(sc, arg1))))
-		{
-		  fx_annotate_args(sc, cdr(expr), e);
-		  if (!safe_c_aa_to_ag_ga(sc, expr, hop))
-		    {
-		      set_safe_optimize_op(expr, hop + OP_SAFE_C_AA);
-		      set_opt3_pair(expr, cddr(expr));
-		    }}
-	      else
-		{
-		  set_safe_optimize_op(expr, hop + op);
-		  if ((op == OP_SAFE_C_SP) || (op == OP_SAFE_C_CP))
-		    {
-		      opt_sp_1(sc, c_function_call(func), expr);
-		      set_opt3_any(cdr(expr), arg1);
-		    }
-		  else
-		    if (op == OP_SAFE_C_PC)
-		      set_opt3_con(cdr(expr), arg2);
-		}
-	      choose_c_function(sc, expr, func, 2);
-	      return(OPT_T);
-	    }}
+          (pairs == 1))
+        {
+          if ((func_is_safe) ||
+              ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
+            {
+              combine_op_t orig_op;
+              int32_t op;
+
+              if (is_pair(arg1))
+                {
+                  orig_op = (is_normal_symbol(arg2)) ? E_C_PS : E_C_PC;
+                  op = combine_ops(sc, expr, orig_op, arg1, arg2);
+                }
+              else
+                {
+                  orig_op = (is_normal_symbol(arg1)) ? E_C_SP : E_C_CP;
+                  op = combine_ops(sc, expr, orig_op, arg1, arg2);
+                }
+              if ((((op == OP_SAFE_C_SP) || (op == OP_SAFE_C_CP)) &&
+                   (is_fxable(sc, arg2))) ||
+                  (((op == OP_SAFE_C_PS) || (op == OP_SAFE_C_PC)) &&
+                   (is_fxable(sc, arg1))))
+                {
+                  fx_annotate_args(sc, cdr(expr), e);
+                  if (!safe_c_aa_to_ag_ga(sc, expr, hop))
+                    {
+                      set_safe_optimize_op(expr, hop + OP_SAFE_C_AA);
+                      set_opt3_pair(expr, cddr(expr));
+                    }}
+              else
+                {
+                  set_safe_optimize_op(expr, hop + op);
+                  if ((op == OP_SAFE_C_SP) || (op == OP_SAFE_C_CP))
+                    {
+                      opt_sp_1(sc, c_function_call(func), expr);
+                      set_opt3_any(cdr(expr), arg1);
+                    }
+                  else
+                    if (op == OP_SAFE_C_PC)
+                      set_opt3_con(cdr(expr), arg2);
+                }
+              choose_c_function(sc, expr, func, 2);
+              return(OPT_T);
+            }}
 
       if ((bad_pairs == 1) && (quotes == 1))
-	{
-	  if ((func_is_safe) ||
-	      ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
-	    {
-	      if  (symbols == 1)
-		{
-		  set_optimized(expr);
-		  if (is_normal_symbol(arg1))
-		    {
-		      set_opt2_con(cdr(expr), cadr(arg2));
-		      set_optimize_op(expr, hop + OP_SAFE_C_SC);
-		    }
-		  else
-		    {
-		      set_opt1_con(cdr(expr), cadr(arg1));
-		      set_opt2_sym(cdr(expr), arg2);
-		      set_optimize_op(expr, hop + OP_SAFE_C_CS);
-		    }
-		  choose_c_function(sc, expr, func, 2);
-		  return(OPT_T);
-		}
-	      if ((pairs == 1) && (is_pair(arg2))) /* QC never happens */
-		{
-		  set_safe_optimize_op(expr, hop + OP_SAFE_C_CQ);
-		  set_opt2_con(cdr(expr), cadr(arg2));
-		  choose_c_function(sc, expr, func, 2);
-		  return(OPT_T);
-		}
-	      if (!is_safe_c_s(arg1))
-		{
-		  if ((is_fxable(sc, arg1)) && (is_fxable(sc, arg2)))
-		    return(check_c_aa(sc, expr, func, hop, e));
-		}}
-	  else
-	    if (pairs == 1)
-	      {
-		set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA));
-		fx_annotate_args(sc, cdr(expr), e);
-		set_opt3_arglen(cdr(expr), 2);
-		choose_c_function(sc, expr, func, 2);
-		return(OPT_F);
-	      }}
+        {
+          if ((func_is_safe) ||
+              ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e))))
+            {
+              if  (symbols == 1)
+                {
+                  set_optimized(expr);
+                  if (is_normal_symbol(arg1))
+                    {
+                      set_opt2_con(cdr(expr), cadr(arg2));
+                      set_optimize_op(expr, hop + OP_SAFE_C_SC);
+                    }
+                  else
+                    {
+                      set_opt1_con(cdr(expr), cadr(arg1));
+                      set_opt2_sym(cdr(expr), arg2);
+                      set_optimize_op(expr, hop + OP_SAFE_C_CS);
+                    }
+                  choose_c_function(sc, expr, func, 2);
+                  return(OPT_T);
+                }
+              if ((pairs == 1) && (is_pair(arg2))) /* QC never happens */
+                {
+                  set_safe_optimize_op(expr, hop + OP_SAFE_C_CQ);
+                  set_opt2_con(cdr(expr), cadr(arg2));
+                  choose_c_function(sc, expr, func, 2);
+                  return(OPT_T);
+                }
+              if (!is_safe_c_s(arg1))
+                {
+                  if ((is_fxable(sc, arg1)) && (is_fxable(sc, arg2)))
+                    return(check_c_aa(sc, expr, func, hop, e));
+                }}
+          else
+            if (pairs == 1)
+              {
+                set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA));
+                fx_annotate_args(sc, cdr(expr), e);
+                set_opt3_arglen(cdr(expr), 2);
+                choose_c_function(sc, expr, func, 2);
+                return(OPT_F);
+              }}
 
       if (quotes == 2)
-	{
-	  if (func_is_safe)
-	    {
-	      set_safe_optimize_op(expr, hop + OP_SAFE_C_AA); /* op_safe_c_nc -> fx_c_nc appears to leave quoted pairs quoted? */
-	      set_opt3_pair(expr, cddr(expr));
-	    }
-	  else
-	    {
-	      set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA));
-	      set_opt3_arglen(cdr(expr), 2);
-	    }
-	  fx_annotate_args(sc, cdr(expr), e);
-	  choose_c_function(sc, expr, func, 2);
-	  return((func_is_safe) ? OPT_T : OPT_F);
-	}
+        {
+          if (func_is_safe)
+            {
+              set_safe_optimize_op(expr, hop + OP_SAFE_C_AA); /* op_safe_c_nc -> fx_c_nc appears to leave quoted pairs quoted? */
+              set_opt3_pair(expr, cddr(expr));
+            }
+          else
+            {
+              set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA));
+              set_opt3_arglen(cdr(expr), 2);
+            }
+          fx_annotate_args(sc, cdr(expr), e);
+          choose_c_function(sc, expr, func, 2);
+          return((func_is_safe) ? OPT_T : OPT_F);
+        }
 
       if ((pairs == 1) &&
-	  (quotes == 0) &&
-	  ((func_is_safe) ||
-	   ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e)))))
-	{
-	  if (symbols == 1)
-	    {
-	      set_optimized(expr);
-	      if (is_normal_symbol(arg1)) /* this is what optimize_expression uses to count symbols */
-		{
-		  set_optimize_op(expr, hop + OP_SAFE_C_SP);
-		  opt_sp_1(sc, c_function_call(func), expr);
-		}
-	      else set_optimize_op(expr, hop + OP_SAFE_C_PS);
-	      choose_c_function(sc, expr, func, 2);
-	      if (bad_pairs == 0)
-		return(OPT_T);
-	      set_unsafe(expr);
-	      return(OPT_F);
-	    }
-	  if (symbols == 0)
-	    {
-	      set_optimized(expr);
-	      if ((is_fxable(sc, arg1)) && (is_fxable(sc, arg2)))
-		return(check_c_aa(sc, expr, func, hop, e));
-	      if (is_pair(arg1))
-		{
-		  set_optimize_op(expr, hop + OP_SAFE_C_PC);
-		  set_opt3_con(cdr(expr), arg2);
-		}
-	      else
-		{
-		  set_optimize_op(expr, hop + OP_SAFE_C_CP);
-		  opt_sp_1(sc, c_function_call(func), expr);
-		  set_opt3_any(cdr(expr), arg1);
-		}
-	      choose_c_function(sc, expr, func, 2);
-	      if (bad_pairs == 0)
-		return(OPT_T);
-	      set_unsafe(expr);
-	      return(OPT_F);
-	    }}
+          (quotes == 0) &&
+          ((func_is_safe) ||
+           ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e)))))
+        {
+          if (symbols == 1)
+            {
+              set_optimized(expr);
+              if (is_normal_symbol(arg1)) /* this is what optimize_expression uses to count symbols */
+                {
+                  set_optimize_op(expr, hop + OP_SAFE_C_SP);
+                  opt_sp_1(sc, c_function_call(func), expr);
+                }
+              else set_optimize_op(expr, hop + OP_SAFE_C_PS);
+              choose_c_function(sc, expr, func, 2);
+              if (bad_pairs == 0)
+                return(OPT_T);
+              set_unsafe(expr);
+              return(OPT_F);
+            }
+          if (symbols == 0)
+            {
+              set_optimized(expr);
+              if ((is_fxable(sc, arg1)) && (is_fxable(sc, arg2)))
+                return(check_c_aa(sc, expr, func, hop, e));
+              if (is_pair(arg1))
+                {
+                  set_optimize_op(expr, hop + OP_SAFE_C_PC);
+                  set_opt3_con(cdr(expr), arg2);
+                }
+              else
+                {
+                  set_optimize_op(expr, hop + OP_SAFE_C_CP);
+                  opt_sp_1(sc, c_function_call(func), expr);
+                  set_opt3_any(cdr(expr), arg1);
+                }
+              choose_c_function(sc, expr, func, 2);
+              if (bad_pairs == 0)
+                return(OPT_T);
+              set_unsafe(expr);
+              return(OPT_F);
+            }}
 
       if ((pairs == 2) &&
-	  ((func_is_safe) ||
-	   ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e)))))
-	{
-	  if ((bad_pairs == 1) &&
-	      (is_safe_c_s(arg1)))
-	    {
-	      /* unsafe func here won't work unless we check that later and make the new arg list (for list-values etc)
-	       *   (and it has to be the last pair else the unknown_g stuff can mess up)
-	       */
-	      if (is_safe_quote(car(arg2)))
-		{
-		  if (!is_proper_list_1(sc, cdr(arg2)))
-		    return(OPT_OOPS);
-		  set_safe_optimize_op(expr, hop + OP_SAFE_C_opSq_C);
-		  set_opt1_sym(cdr(expr), cadr(arg1));
-		  set_opt2_con(cdr(expr), cadr(arg2));
-		  choose_c_function(sc, expr, func, 2);
-		  return(OPT_T);
-		}}
-	  if (quotes == 0)
-	    {
-	      set_unsafely_optimized(expr);
-	      if (is_fxable(sc, arg1))
-		{
-		  if (is_fxable(sc, arg2))
-		    return(check_c_aa(sc, expr, func, hop, e));
-		  set_optimize_op(expr, hop + OP_SAFE_C_AP);
-		  opt_sp_1(sc, c_function_call(func), expr);
-		  fx_annotate_arg(sc, cdr(expr), e);
-		}
-	      else
-		if (is_fxable(sc, arg2))
-		  {
-		    set_optimize_op(expr, hop + OP_SAFE_C_PA);
-		    fx_annotate_arg(sc, cddr(expr), e);
-		  }
-		else
-		  {
-		    set_optimize_op(expr, hop + OP_SAFE_C_PP);
-		    opt_sp_1(sc, c_function_call(func), expr);
-		  }
-	      choose_c_function(sc, expr, func, 2);
-	      return(OPT_F);
-	    }
-	  if (quotes == 1)
-	    {
-	      if (is_safe_quote(car(arg1)))
-		{
-		  if (!is_proper_list_1(sc, cdr(arg1)))
-		    return(OPT_OOPS);
-		  set_optimize_op(expr, hop + OP_SAFE_C_CP);
-		  opt_sp_1(sc, c_function_call(func), expr);
-		  set_opt3_any(cdr(expr), cadr(arg1));
-		}
-	      else
-		{
-		  set_optimize_op(expr, hop + OP_SAFE_C_PC);
-		  set_opt3_con(cdr(expr), cadr(arg2));
-		}
-	      set_unsafely_optimized(expr);
-	      choose_c_function(sc, expr, func, 2);
-	      return(OPT_F);
-	    }}
+          ((func_is_safe) ||
+           ((is_maybe_safe(func)) && (two_args_ok(sc, expr, e)))))
+        {
+          if ((bad_pairs == 1) &&
+              (is_safe_c_s(arg1)))
+            {
+              /* unsafe func here won't work unless we check that later and make the new arg list (for list-values etc)
+               *   (and it has to be the last pair else the unknown_g stuff can mess up)
+               */
+              if (is_safe_quote(car(arg2)))
+                {
+                  if (!is_proper_list_1(sc, cdr(arg2)))
+                    return(OPT_OOPS);
+                  set_safe_optimize_op(expr, hop + OP_SAFE_C_opSq_C);
+                  set_opt1_sym(cdr(expr), cadr(arg1));
+                  set_opt2_con(cdr(expr), cadr(arg2));
+                  choose_c_function(sc, expr, func, 2);
+                  return(OPT_T);
+                }}
+          if (quotes == 0)
+            {
+              set_unsafely_optimized(expr);
+              if (is_fxable(sc, arg1))
+                {
+                  if (is_fxable(sc, arg2))
+                    return(check_c_aa(sc, expr, func, hop, e));
+                  set_optimize_op(expr, hop + OP_SAFE_C_AP);
+                  opt_sp_1(sc, c_function_call(func), expr);
+                  fx_annotate_arg(sc, cdr(expr), e);
+                }
+              else
+                if (is_fxable(sc, arg2))
+                  {
+                    set_optimize_op(expr, hop + OP_SAFE_C_PA);
+                    fx_annotate_arg(sc, cddr(expr), e);
+                  }
+                else
+                  {
+                    set_optimize_op(expr, hop + OP_SAFE_C_PP);
+                    opt_sp_1(sc, c_function_call(func), expr);
+                  }
+              choose_c_function(sc, expr, func, 2);
+              return(OPT_F);
+            }
+          if (quotes == 1)
+            {
+              if (is_safe_quote(car(arg1)))
+                {
+                  if (!is_proper_list_1(sc, cdr(arg1)))
+                    return(OPT_OOPS);
+                  set_optimize_op(expr, hop + OP_SAFE_C_CP);
+                  opt_sp_1(sc, c_function_call(func), expr);
+                  set_opt3_any(cdr(expr), cadr(arg1));
+                }
+              else
+                {
+                  set_optimize_op(expr, hop + OP_SAFE_C_PC);
+                  set_opt3_con(cdr(expr), cadr(arg2));
+                }
+              set_unsafely_optimized(expr);
+              choose_c_function(sc, expr, func, 2);
+              return(OPT_F);
+            }}
 
       if (func_is_safe)
-	{
-	  if (fx_count(sc, expr) == 2)
-	    return(check_c_aa(sc, expr, func, hop, e));
-	}
+        {
+          if (fx_count(sc, expr) == 2)
+            return(check_c_aa(sc, expr, func, hop, e));
+        }
        else
-	{
-	  if (is_fxable(sc, arg1))
-	    {
-	      if (is_fxable(sc, arg2))
-		{
-		  if ((c_function_call(func) == g_apply) &&
-		      (is_normal_symbol(arg1)))
-		    {
-		      set_optimize_op(expr, OP_APPLY_SA);
-		      if ((is_pair(arg2)) &&
-			  (is_normal_symbol(car(arg2)))) /* arg2 might be ((if expr op1 op2) ...) */
-			{
-			  s7_pointer lister = lookup(sc, car(arg2));
-			  if ((is_c_function(lister)) &&
-			      (is_pair(c_function_signature(lister))) &&
-			      (car(c_function_signature(lister)) == sc->is_proper_list_symbol))
-			    set_optimize_op(expr, OP_APPLY_SL);
-			}
-		      set_opt1_cfunc(expr, func); /* not quite set_c_function */
-		    }
-		  else set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA));
-		  fx_annotate_args(sc, cdr(expr), e);
-		  set_opt3_arglen(cdr(expr), 2);
-		}
-	      else
-		{
-		  if (((c_function_call(func) == g_with_input_from_string) ||
-		       (c_function_call(func) == g_with_input_from_file) ||
-		       (c_function_call(func) == g_with_output_to_file)) &&
-		      (is_ok_lambda(sc, arg2)) &&
-		      (is_null(cadr(arg2))) &&
-		      (!direct_memq(car(arg2), e)))   /* lambda is redefined?? */
-		    {
-		      set_unsafe_optimize_op(expr, (is_string(arg1)) ? OP_WITH_IO_C : OP_WITH_IO);
-		      set_opt2_pair(expr, cddr(arg2));
-		      set_opt1_any(expr, (s7_pointer)io_function(c_function_call(func)));
-		      return(OPT_F);
-		    }
-		  if (((c_function_call(func) == g_call_with_input_string) ||
-		       (c_function_call(func) == g_call_with_input_file) ||
-		       (c_function_call(func) == g_call_with_output_file)) &&
-		      (is_ok_lambda(sc, arg2)) &&
-		      (is_proper_list_1(sc, cadr(arg2))) &&
-		      (is_symbol(caadr(arg2))) &&
-		      (!is_probably_constant(caadr(arg2))) &&
-		      (!direct_memq(sc->lambda_symbol, e)))   /* lambda is redefined?? */
-		    {
-		      set_unsafe_optimize_op(expr, (is_string(arg1)) ? OP_WITH_IO_C : OP_WITH_IO);
-		      set_opt2_pair(expr, cddr(arg2));
-		      set_opt3_sym(expr, caadr(arg2));
-		      set_opt1_any(expr, (s7_pointer)io_function(c_function_call(func)));
-		      return(OPT_F);
-		    }
-		  set_unsafe_optimize_op(expr, hop + OP_C_AP);
-		  fx_annotate_arg(sc, cdr(expr), e);
-		}
-	      choose_c_function(sc, expr, func, 2);
-	      return(OPT_F);
-	    }
-
-	  if ((is_semisafe(func)) &&
-	      (is_symbol(car(expr))) &&
-	      (car(expr) != sc->values_symbol) &&
-	      (is_fxable(sc, arg2)) &&
-	      (is_pair(arg1)) &&
-	      (car(arg1) == sc->lambda_symbol))
-	    {
-	      fx_annotate_arg(sc, cddr(expr), e);
-	      set_unsafe_optimize_op(expr, hop + OP_CL_FA);
-	      check_lambda(sc, arg1, true);        /* this changes symbol_list */
-
-	      clear_symbol_list(sc);               /* so restore it */
-	      for (s7_pointer p = e; is_pair(p); p = cdr(p))
-		if (is_normal_symbol(car(p)))
-		  add_symbol_to_list(sc, car(p));
-
-	      /* two seq args can't happen here (func_2_args = map + lambda + seq, arg1 is the lambda form, arg2 is fxable (see above) */
-	      choose_c_function(sc, expr, func, 2);
-	      if (((fn_proc(expr) == g_for_each) || (fn_proc(expr) == g_map)) &&
-		  ((is_proper_list_1(sc, cadr(arg1))) &&    /* one parameter */
-		   (!is_possibly_constant(caadr(arg1)))))    /* parameter name not trouble */
-		{
-		  /* built-in permanent closure here was not much faster */
-		  set_fn(expr, (fn_proc(expr) == g_for_each) ? g_for_each_closure : NULL);
-		  set_opt3_pair(expr, cdr(arg1));
-		  set_unsafe_optimize_op(expr, OP_MAP_FOR_EACH_FA);
-		}
-	      return(OPT_F);
-	    }}
+        {
+          if (is_fxable(sc, arg1))
+            {
+              if (is_fxable(sc, arg2))
+                {
+                  if ((c_function_call(func) == g_apply) &&
+                      (is_normal_symbol(arg1)))
+                    {
+                      set_optimize_op(expr, OP_APPLY_SA);
+                      if ((is_pair(arg2)) &&
+                          (is_normal_symbol(car(arg2)))) /* arg2 might be ((if expr op1 op2) ...) */
+                        {
+                          s7_pointer lister = lookup(sc, car(arg2));
+                          if ((is_c_function(lister)) &&
+                              (is_pair(c_function_signature(lister))) &&
+                              (car(c_function_signature(lister)) == sc->is_proper_list_symbol))
+                            set_optimize_op(expr, OP_APPLY_SL);
+                        }
+                      set_opt1_cfunc(expr, func); /* not quite set_c_function */
+                    }
+                  else set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_AA : OP_C_AA));
+                  fx_annotate_args(sc, cdr(expr), e);
+                  set_opt3_arglen(cdr(expr), 2);
+                }
+              else
+                {
+                  if (((c_function_call(func) == g_with_input_from_string) ||
+                       (c_function_call(func) == g_with_input_from_file) ||
+                       (c_function_call(func) == g_with_output_to_file)) &&
+                      (is_ok_lambda(sc, arg2)) &&
+                      (is_null(cadr(arg2))) &&
+                      (!direct_memq(car(arg2), e)))   /* lambda is redefined?? */
+                    {
+                      set_unsafe_optimize_op(expr, (is_string(arg1)) ? OP_WITH_IO_C : OP_WITH_IO);
+                      set_opt2_pair(expr, cddr(arg2));
+                      set_opt1_any(expr, (s7_pointer)io_function(c_function_call(func)));
+                      return(OPT_F);
+                    }
+                  if (((c_function_call(func) == g_call_with_input_string) ||
+                       (c_function_call(func) == g_call_with_input_file) ||
+                       (c_function_call(func) == g_call_with_output_file)) &&
+                      (is_ok_lambda(sc, arg2)) &&
+                      (is_proper_list_1(sc, cadr(arg2))) &&
+                      (is_symbol(caadr(arg2))) &&
+                      (!is_probably_constant(caadr(arg2))) &&
+                      (!direct_memq(sc->lambda_symbol, e)))   /* lambda is redefined?? */
+                    {
+                      set_unsafe_optimize_op(expr, (is_string(arg1)) ? OP_WITH_IO_C : OP_WITH_IO);
+                      set_opt2_pair(expr, cddr(arg2));
+                      set_opt3_sym(expr, caadr(arg2));
+                      set_opt1_any(expr, (s7_pointer)io_function(c_function_call(func)));
+                      return(OPT_F);
+                    }
+                  set_unsafe_optimize_op(expr, hop + OP_C_AP);
+                  fx_annotate_arg(sc, cdr(expr), e);
+                }
+              choose_c_function(sc, expr, func, 2);
+              return(OPT_F);
+            }
+
+          if ((is_semisafe(func)) &&
+              (is_symbol(car(expr))) &&
+              (car(expr) != sc->values_symbol) &&
+              (is_fxable(sc, arg2)) &&
+              (is_pair(arg1)) &&
+              (car(arg1) == sc->lambda_symbol))
+            {
+              fx_annotate_arg(sc, cddr(expr), e);
+              set_unsafe_optimize_op(expr, hop + OP_CL_FA);
+              check_lambda(sc, arg1, true);        /* this changes symbol_list */
+
+              clear_symbol_list(sc);               /* so restore it */
+              for (s7_pointer p = e; is_pair(p); p = cdr(p))
+                if (is_normal_symbol(car(p)))
+                  add_symbol_to_list(sc, car(p));
+
+              /* two seq args can't happen here (func_2_args = map + lambda + seq, arg1 is the lambda form, arg2 is fxable (see above) */
+              choose_c_function(sc, expr, func, 2);
+              if (((fn_proc(expr) == g_for_each) || (fn_proc(expr) == g_map)) &&
+                  ((is_proper_list_1(sc, cadr(arg1))) &&    /* one parameter */
+                   (!is_possibly_constant(caadr(arg1)))))    /* parameter name not trouble */
+                {
+                  /* built-in permanent closure here was not much faster */
+                  set_fn(expr, (fn_proc(expr) == g_for_each) ? g_for_each_closure : NULL);
+                  set_opt3_pair(expr, cdr(arg1));
+                  set_unsafe_optimize_op(expr, OP_MAP_FOR_EACH_FA);
+                }
+              return(OPT_F);
+            }}
       return(set_any_c_np(sc, func, expr, e, 2, hop + OP_ANY_C_NP)); /* OP_C_PP doesn't exist, presumably OP_SAFE_C_PP was caught above? */
     }
 
@@ -72264,13 +72264,13 @@ static opt_t optimize_func_two_args(s7_scheme *sc, s7_pointer expr, s7_pointer f
       int32_t arit = closure_arity_to_int(sc, func);
 
       if (arit != 2)
-	{
-	  if (is_symbol(closure_args(func)))
-	    return(optimize_closure_sym(sc, expr, func, hop, 2, e));
-	  if ((arit == -1) && (is_symbol(cdr(closure_args(func))))) /* (define (f a . b) ...) */
-	    return(optimize_closure_a_sym(sc, expr, func, hop, 2, e));
-	  return(OPT_F);
-	}
+        {
+          if (is_symbol(closure_args(func)))
+            return(optimize_closure_sym(sc, expr, func, hop, 2, e));
+          if ((arit == -1) && (is_symbol(cdr(closure_args(func))))) /* (define (f a . b) ...) */
+            return(optimize_closure_a_sym(sc, expr, func, hop, 2, e));
+          return(OPT_F);
+        }
       if (is_immutable(func)) hop = 1;
 
       body = closure_body(func);
@@ -72278,112 +72278,112 @@ static opt_t optimize_func_two_args(s7_scheme *sc, s7_pointer expr, s7_pointer f
       safe_case = is_safe_closure(func);
 
       if ((pairs == 0) &&
-	  (symbols >= 1))
-	{
-	  set_unsafely_optimized(expr);
-	  set_opt1_lambda_add(expr, func);
-	  if (symbols == 2)
-	    {
-	      set_opt2_sym(expr, arg2);
-	      if (!one_form)
-		set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_SS : OP_CLOSURE_SS));
-	      else
-		if (!safe_case)
-		  set_optimize_op(expr, hop + OP_CLOSURE_SS_O);
-		else
-		  if (!is_fxable(sc, car(body)))
-		    set_optimize_op(expr, hop + OP_SAFE_CLOSURE_SS_O);
-		  else
-		    {
-		      fx_annotate_arg(sc, body, e);
-		      fx_tree(sc, body, car(closure_args(func)), cadr(closure_args(func)), NULL, false);
-		      set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_SS_A);
-		      /* fx_annotate_args(sc, cdr(expr), e); */
-		      set_closure_one_form_fx_arg(func);
-		      return(OPT_T);
-		    }
-	      return(OPT_F);
-	    }
-	  if (is_normal_symbol(arg1))
-	    {
-	      if (one_form)
-		set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC_O : OP_CLOSURE_SC_O)); /* _A case is very rare */
-	      else set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC : OP_CLOSURE_SC));
-	      set_opt2_con(expr, arg2);
-	      return(OPT_F);
-	    }}
+          (symbols >= 1))
+        {
+          set_unsafely_optimized(expr);
+          set_opt1_lambda_add(expr, func);
+          if (symbols == 2)
+            {
+              set_opt2_sym(expr, arg2);
+              if (!one_form)
+                set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_SS : OP_CLOSURE_SS));
+              else
+                if (!safe_case)
+                  set_optimize_op(expr, hop + OP_CLOSURE_SS_O);
+                else
+                  if (!is_fxable(sc, car(body)))
+                    set_optimize_op(expr, hop + OP_SAFE_CLOSURE_SS_O);
+                  else
+                    {
+                      fx_annotate_arg(sc, body, e);
+                      fx_tree(sc, body, car(closure_args(func)), cadr(closure_args(func)), NULL, false);
+                      set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_SS_A);
+                      /* fx_annotate_args(sc, cdr(expr), e); */
+                      set_closure_one_form_fx_arg(func);
+                      return(OPT_T);
+                    }
+              return(OPT_F);
+            }
+          if (is_normal_symbol(arg1))
+            {
+              if (one_form)
+                set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC_O : OP_CLOSURE_SC_O)); /* _A case is very rare */
+              else set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC : OP_CLOSURE_SC));
+              set_opt2_con(expr, arg2);
+              return(OPT_F);
+            }}
 
       if ((!arglist_has_rest(sc, closure_args(func))) &&
-	  (fx_count(sc, expr) == 2))
-	{
-	  if (!one_form)
-	    set_safe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_AA : OP_CLOSURE_AA));
-	  else
-	    if (!safe_case)
-	      set_optimize_op(expr, hop + OP_CLOSURE_AA_O);
-	    else
-	      if (!is_fxable(sc, car(body)))
-		set_optimize_op(expr, hop + OP_SAFE_CLOSURE_AA_O);
-	      else
-		{
-		  fx_annotate_arg(sc, body, e);
-		  set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_AA_A); /* safe_closure_as|sa_a? */
-		  set_closure_one_form_fx_arg(func);
-		  fx_annotate_args(sc, cdr(expr), e);
-		  set_opt1_lambda_add(expr, func);
-		  set_opt3_arglen(cdr(expr), 2);
-		  return(OPT_T);
-		}
-	  fx_annotate_args(sc, cdr(expr), e);
-	  set_opt1_lambda_add(expr, func);
-	  set_opt3_arglen(cdr(expr), 2);
-	  return(OPT_F);
-	}
+          (fx_count(sc, expr) == 2))
+        {
+          if (!one_form)
+            set_safe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_AA : OP_CLOSURE_AA));
+          else
+            if (!safe_case)
+              set_optimize_op(expr, hop + OP_CLOSURE_AA_O);
+            else
+              if (!is_fxable(sc, car(body)))
+                set_optimize_op(expr, hop + OP_SAFE_CLOSURE_AA_O);
+              else
+                {
+                  fx_annotate_arg(sc, body, e);
+                  set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_AA_A); /* safe_closure_as|sa_a? */
+                  set_closure_one_form_fx_arg(func);
+                  fx_annotate_args(sc, cdr(expr), e);
+                  set_opt1_lambda_add(expr, func);
+                  set_opt3_arglen(cdr(expr), 2);
+                  return(OPT_T);
+                }
+          fx_annotate_args(sc, cdr(expr), e);
+          set_opt1_lambda_add(expr, func);
+          set_opt3_arglen(cdr(expr), 2);
+          return(OPT_F);
+        }
 
       if (is_fxable(sc, arg1))
-	{
-	  set_unsafely_optimized(expr);
-	  fx_annotate_arg(sc, cdr(expr), e);
-	  set_safe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_AP : OP_CLOSURE_AP));
-	  set_opt1_lambda_add(expr, func);
-	  set_opt3_arglen(cdr(expr), 2); /* for op_unknown_np */
-	  return(OPT_F);
-	}
+        {
+          set_unsafely_optimized(expr);
+          fx_annotate_arg(sc, cdr(expr), e);
+          set_safe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_AP : OP_CLOSURE_AP));
+          set_opt1_lambda_add(expr, func);
+          set_opt3_arglen(cdr(expr), 2); /* for op_unknown_np */
+          return(OPT_F);
+        }
 
       if ((is_pair(arg1)) &&
-	  (car(arg1) == sc->lambda_symbol) &&
-	  (is_pair(cdr(arg1))) &&              /* not (lambda) */
-	  (is_fxable(sc, arg2)) &&
-	  (is_null(cdr(closure_body(func)))))
-	{
-	  fx_annotate_arg(sc, cddr(expr), e);
-	  set_opt2_pair(expr, cdr(arg1));
-	  set_unsafe_optimize_op(expr, hop + OP_CLOSURE_FA);
-	  check_lambda(sc, arg1, false);
-
-	  clear_symbol_list(sc); /* clobbered in check_lambda so restore it? */
-	  for (s7_pointer p = e; is_pair(p); p = cdr(p))
-	    if (is_normal_symbol(car(p)))
-	      add_symbol_to_list(sc, car(p));
-
-	  /* check_lambda calls optimize_lambda if define in progress, else just optimize on the body */
-	  clear_safe_closure_body(cddr(arg1)); /* otherwise we need to fixup the local let for the optimizer -- see s7test intersection case 91492 */
-	  set_opt1_lambda_add(expr, func);
-	  return(OPT_F);
-	}
+          (car(arg1) == sc->lambda_symbol) &&
+          (is_pair(cdr(arg1))) &&              /* not (lambda) */
+          (is_fxable(sc, arg2)) &&
+          (is_null(cdr(closure_body(func)))))
+        {
+          fx_annotate_arg(sc, cddr(expr), e);
+          set_opt2_pair(expr, cdr(arg1));
+          set_unsafe_optimize_op(expr, hop + OP_CLOSURE_FA);
+          check_lambda(sc, arg1, false);
+
+          clear_symbol_list(sc); /* clobbered in check_lambda so restore it? */
+          for (s7_pointer p = e; is_pair(p); p = cdr(p))
+            if (is_normal_symbol(car(p)))
+              add_symbol_to_list(sc, car(p));
+
+          /* check_lambda calls optimize_lambda if define in progress, else just optimize on the body */
+          clear_safe_closure_body(cddr(arg1)); /* otherwise we need to fixup the local let for the optimizer -- see s7test intersection case 91492 */
+          set_opt1_lambda_add(expr, func);
+          return(OPT_F);
+        }
 
       if (is_fxable(sc, arg2))
-	{
-	  set_unsafely_optimized(expr);
-	  fx_annotate_arg(sc, cddr(expr), e);
-	  set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_PA : OP_CLOSURE_PA));
-	  set_opt1_lambda_add(expr, func);
-	  set_opt3_arglen(cdr(expr), 2); /* for op_unknown_np */
-	  return(OPT_F);
-	}
+        {
+          set_unsafely_optimized(expr);
+          fx_annotate_arg(sc, cddr(expr), e);
+          set_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_PA : OP_CLOSURE_PA));
+          set_opt1_lambda_add(expr, func);
+          set_opt3_arglen(cdr(expr), 2); /* for op_unknown_np */
+          return(OPT_F);
+        }
 
       if (is_safe_closure(func)) /* clo* too */
-	return(set_any_closure_np(sc, func, expr, e, 2, hop + OP_SAFE_CLOSURE_PP));
+        return(set_any_closure_np(sc, func, expr, e, 2, hop + OP_SAFE_CLOSURE_PP));
 
       set_unsafely_optimized(expr);
       set_optimize_op(expr, hop + OP_CLOSURE_PP);
@@ -72395,15 +72395,15 @@ static opt_t optimize_func_two_args(s7_scheme *sc, s7_pointer expr, s7_pointer f
   if (is_closure_star(func))
     {
       if (!closure_star_is_aritable(sc, func, closure_args(func), 1)) /* not 2, cadr(expr) might be keyword or pair->keyword etc */
-	return(OPT_OOPS);                                             /* (let* cons () (lambda* (a . b) (cons a b))) so closure_args=(), arity=0 ?? */
+        return(OPT_OOPS);                                             /* (let* cons () (lambda* (a . b) (cons a b))) so closure_args=(), arity=0 ?? */
       if (is_immutable(func)) hop = 1;
       if (fx_count(sc, expr) == 2)
-	{
-	  fixup_closure_star_aa(sc, func, expr, hop);
-	  fx_annotate_args(sc, cdr(expr), e);
-	  set_opt1_lambda_add(expr, func);
-	  return(OPT_F);
-	}}
+        {
+          fixup_closure_star_aa(sc, func, expr, hop);
+          fx_annotate_args(sc, cdr(expr), e);
+          set_opt1_lambda_add(expr, func);
+          return(OPT_F);
+        }}
 
   if ((is_c_function_star(func)) &&
       (fx_count(sc, expr) == 2) &&
@@ -72431,66 +72431,66 @@ static opt_t optimize_func_two_args(s7_scheme *sc, s7_pointer expr, s7_pointer f
 }
 
 static opt_t optimize_safe_c_func_three_args(s7_scheme *sc, s7_pointer expr, s7_pointer func,
-					     int32_t hop, int32_t pairs, int32_t symbols, int32_t quotes, s7_pointer e)
+                                             int32_t hop, int32_t pairs, int32_t symbols, int32_t quotes, s7_pointer e)
 {
   s7_pointer arg1 = cadr(expr), arg2 = caddr(expr), arg3 = cadddr(expr);
   if (pairs == 0)
     {
       set_optimized(expr);
       if (symbols == 0)
-	set_optimize_op(expr, hop + OP_SAFE_C_NC);
+        set_optimize_op(expr, hop + OP_SAFE_C_NC);
       else
-	{
-	  clear_has_fx(cdr(expr));
-	  if (symbols == 3)
-	    {
-	      set_optimize_op(expr, hop + OP_SAFE_C_SSS);
-	      set_opt1_sym(cdr(expr), arg2);
-	      set_opt2_sym(cdr(expr), arg3);
-	    }
-	  else
-	    if (symbols == 2)
-	      if (!is_normal_symbol(arg1))
-		{
-		  set_optimize_op(expr, hop + OP_SAFE_C_CSS);
-		  set_opt1_sym(cdr(expr), arg2);
-		  set_opt2_sym(cdr(expr), arg3);
-		}
-	      else
-		if (!is_normal_symbol(arg3))
-		  {
-		    set_opt2_con(cdr(expr), arg3);
-		    set_opt1_sym(cdr(expr), arg2);
-		    set_optimize_op(expr, hop + OP_SAFE_C_SSC);
-		  }
-		else
-		  {
-		    set_opt1_con(cdr(expr), arg2);
-		    set_opt2_sym(cdr(expr), arg3);
-		    set_optimize_op(expr, hop + OP_SAFE_C_SCS);
-		  }
-	    else
-	      if (is_normal_symbol(arg1))
-		{
-		  set_opt1_con(cdr(expr), arg2);
-		  set_opt2_con(cdr(expr), arg3);
-		  set_optimize_op(expr, hop + OP_SAFE_C_SCC);
-		}
-	      else
-		if (is_normal_symbol(arg2))
-		  {
-		    set_opt1_sym(cdr(expr), arg2);
-		    set_opt2_con(cdr(expr), arg3);
-		    set_opt3_con(cdr(expr), arg1);
-		    set_optimize_op(expr, hop + OP_SAFE_C_CSC);
-		  }
-		else
-		  {
-		    set_opt1_sym(cdr(expr), arg3);
-		    set_opt2_con(cdr(expr), arg2);
-		    set_opt3_con(cdr(expr), arg1);
-		    set_optimize_op(expr, hop + OP_SAFE_C_CCS);
-		  }}
+        {
+          clear_has_fx(cdr(expr));
+          if (symbols == 3)
+            {
+              set_optimize_op(expr, hop + OP_SAFE_C_SSS);
+              set_opt1_sym(cdr(expr), arg2);
+              set_opt2_sym(cdr(expr), arg3);
+            }
+          else
+            if (symbols == 2)
+              if (!is_normal_symbol(arg1))
+                {
+                  set_optimize_op(expr, hop + OP_SAFE_C_CSS);
+                  set_opt1_sym(cdr(expr), arg2);
+                  set_opt2_sym(cdr(expr), arg3);
+                }
+              else
+                if (!is_normal_symbol(arg3))
+                  {
+                    set_opt2_con(cdr(expr), arg3);
+                    set_opt1_sym(cdr(expr), arg2);
+                    set_optimize_op(expr, hop + OP_SAFE_C_SSC);
+                  }
+                else
+                  {
+                    set_opt1_con(cdr(expr), arg2);
+                    set_opt2_sym(cdr(expr), arg3);
+                    set_optimize_op(expr, hop + OP_SAFE_C_SCS);
+                  }
+            else
+              if (is_normal_symbol(arg1))
+                {
+                  set_opt1_con(cdr(expr), arg2);
+                  set_opt2_con(cdr(expr), arg3);
+                  set_optimize_op(expr, hop + OP_SAFE_C_SCC);
+                }
+              else
+                if (is_normal_symbol(arg2))
+                  {
+                    set_opt1_sym(cdr(expr), arg2);
+                    set_opt2_con(cdr(expr), arg3);
+                    set_opt3_con(cdr(expr), arg1);
+                    set_optimize_op(expr, hop + OP_SAFE_C_CSC);
+                  }
+                else
+                  {
+                    set_opt1_sym(cdr(expr), arg3);
+                    set_opt2_con(cdr(expr), arg2);
+                    set_opt3_con(cdr(expr), arg1);
+                    set_optimize_op(expr, hop + OP_SAFE_C_CCS);
+                  }}
       choose_c_function(sc, expr, func, 3);
       return(OPT_T);
     }
@@ -72500,42 +72500,42 @@ static opt_t optimize_safe_c_func_three_args(s7_scheme *sc, s7_pointer expr, s7_
     {
       set_optimized(expr);
       if (quotes == 1)
-	{
-	  if ((symbols == 2) &&
-	      (is_normal_symbol(arg1)) &&
-	      (is_normal_symbol(arg3)))
-	    {
-	      set_opt1_con(cdr(expr), cadr(arg2));        /* fx_c_scs uses opt1_con */
-	      clear_has_fx(cdr(expr));                    /* (s7test safe_c_func_three_args) this is used above -- maybe just clear it at the top? */
-	      set_opt2_sym(cdr(expr), arg3);
-	      set_optimize_op(expr, hop + OP_SAFE_C_SCS); /* used to be SQS */
-	      choose_c_function(sc, expr, func, 3);
-	      return(OPT_T);
-	    }
-	  if (symbols == 1)
-	    {
-	      if ((is_normal_symbol(arg3)) &&
-		  (is_proper_quote(sc, arg2)) &&
-		  (is_safe_c_s(arg1)))
-		{
-		  set_safe_optimize_op(expr, hop + OP_SAFE_C_opSq_CS); /* lg */
-		  set_opt1_con(cdr(expr), cadr(arg2)); /* opt1_con is T_Exs (unchecked) */
-		  set_opt2_sym(cdr(expr), arg3);
-		  set_opt3_sym(cdr(expr), cadr(arg1));
-		  choose_c_function(sc, expr, func, 3);
-		  return(OPT_T);
-		}
-	      if ((is_normal_symbol(arg2)) &&
-		  (is_proper_quote(sc, arg1)) &&
-		  (!is_pair(arg3)))
-		{
-		  set_optimize_op(expr, hop + OP_SAFE_C_CSC);
-		  set_opt1_sym(cdr(expr), arg2);
-		  set_opt2_con(cdr(expr), arg3);
-		  set_opt3_con(cdr(expr), cadr(arg1));
-		  choose_c_function(sc, expr, func, 3);
-		  return(OPT_T);
-		}}}
+        {
+          if ((symbols == 2) &&
+              (is_normal_symbol(arg1)) &&
+              (is_normal_symbol(arg3)))
+            {
+              set_opt1_con(cdr(expr), cadr(arg2));        /* fx_c_scs uses opt1_con */
+              clear_has_fx(cdr(expr));                    /* (s7test safe_c_func_three_args) this is used above -- maybe just clear it at the top? */
+              set_opt2_sym(cdr(expr), arg3);
+              set_optimize_op(expr, hop + OP_SAFE_C_SCS); /* used to be SQS */
+              choose_c_function(sc, expr, func, 3);
+              return(OPT_T);
+            }
+          if (symbols == 1)
+            {
+              if ((is_normal_symbol(arg3)) &&
+                  (is_proper_quote(sc, arg2)) &&
+                  (is_safe_c_s(arg1)))
+                {
+                  set_safe_optimize_op(expr, hop + OP_SAFE_C_opSq_CS); /* lg */
+                  set_opt1_con(cdr(expr), cadr(arg2)); /* opt1_con is T_Exs (unchecked) */
+                  set_opt2_sym(cdr(expr), arg3);
+                  set_opt3_sym(cdr(expr), cadr(arg1));
+                  choose_c_function(sc, expr, func, 3);
+                  return(OPT_T);
+                }
+              if ((is_normal_symbol(arg2)) &&
+                  (is_proper_quote(sc, arg1)) &&
+                  (!is_pair(arg3)))
+                {
+                  set_optimize_op(expr, hop + OP_SAFE_C_CSC);
+                  set_opt1_sym(cdr(expr), arg2);
+                  set_opt2_con(cdr(expr), arg3);
+                  set_opt3_con(cdr(expr), cadr(arg1));
+                  choose_c_function(sc, expr, func, 3);
+                  return(OPT_T);
+                }}}
 
       fx_annotate_args(sc, cdr(expr), e);
       set_opt3_arglen(cdr(expr), 3);
@@ -72543,35 +72543,35 @@ static opt_t optimize_safe_c_func_three_args(s7_scheme *sc, s7_pointer expr, s7_
       set_optimize_op(expr, hop + OP_SAFE_C_AAA);
 
       if (pairs == 1)
-	{
-	  if (is_pair(arg1)) set_optimize_op(expr, hop + OP_SAFE_C_AGG);
-
-	  if ((symbols == 0) && (is_pair(arg2)))
-	    set_optimize_op(expr, hop + OP_SAFE_C_CAC);
-	  else
-	    {
-	      if ((symbols == 1) && (is_pair(arg3)))
-		set_optimize_op(expr, hop + ((is_normal_symbol(arg2)) ? OP_SAFE_C_CSA : OP_SAFE_C_SCA));
-	      else
-		{
-		  if (symbols == 2)
-		    {
-		      if (is_normal_symbol(arg1))
-			{
-			  if (is_normal_symbol(arg2))
-			    {
-			      set_optimize_op(expr, hop + OP_SAFE_C_SSA);
-			      clear_has_fx(cdr(expr)); /* has_fx might have been on (see s7test) */
-			    }
-			  else set_optimize_op(expr, hop + OP_SAFE_C_SAS);
-			}
-		      else
-			if (is_pair(arg1))
-			  set_optimize_op(expr, hop + OP_SAFE_C_ASS);
-		    }}}}
+        {
+          if (is_pair(arg1)) set_optimize_op(expr, hop + OP_SAFE_C_AGG);
+
+          if ((symbols == 0) && (is_pair(arg2)))
+            set_optimize_op(expr, hop + OP_SAFE_C_CAC);
+          else
+            {
+              if ((symbols == 1) && (is_pair(arg3)))
+                set_optimize_op(expr, hop + ((is_normal_symbol(arg2)) ? OP_SAFE_C_CSA : OP_SAFE_C_SCA));
+              else
+                {
+                  if (symbols == 2)
+                    {
+                      if (is_normal_symbol(arg1))
+                        {
+                          if (is_normal_symbol(arg2))
+                            {
+                              set_optimize_op(expr, hop + OP_SAFE_C_SSA);
+                              clear_has_fx(cdr(expr)); /* has_fx might have been on (see s7test) */
+                            }
+                          else set_optimize_op(expr, hop + OP_SAFE_C_SAS);
+                        }
+                      else
+                        if (is_pair(arg1))
+                          set_optimize_op(expr, hop + OP_SAFE_C_ASS);
+                    }}}}
       else
-	if ((is_normal_symbol(arg1)) && (pairs == 2))
-	  set_optimize_op(expr, hop + OP_SAFE_C_SAA);
+        if ((is_normal_symbol(arg1)) && (pairs == 2))
+          set_optimize_op(expr, hop + OP_SAFE_C_SAA);
 
       choose_c_function(sc, expr, func, 3);
       return(OPT_T);
@@ -72580,7 +72580,7 @@ static opt_t optimize_safe_c_func_three_args(s7_scheme *sc, s7_pointer expr, s7_
 }
 
 static opt_t optimize_func_three_args(s7_scheme *sc, s7_pointer expr, s7_pointer func, int32_t hop,
-				      int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
+                                      int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
 {
   s7_pointer arg1, arg2, arg3;
   if ((quotes > 0) &&
@@ -72599,44 +72599,44 @@ static opt_t optimize_func_three_args(s7_scheme *sc, s7_pointer expr, s7_pointer
     {
       /* wrap bad args */
       if ((is_fxable(sc, arg1)) &&
-	  (is_fxable(sc, arg2)) &&
-	  (is_fxable(sc, arg3)) &&
-	  (s7_is_aritable(sc, func, 3)))
-	{
-	  fx_annotate_args(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), 3);
-	  if (is_c_function(func))
-	    {
-	      if (is_safe_procedure(func))
-		{
-		  set_safe_optimize_op(expr, hop + OP_SAFE_C_AAA);
-		  set_opt3_pair(cdr(expr), cdddr(expr));
-		  set_opt3_pair(expr, cddr(expr));
-		}
-	      else set_safe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_NA : OP_C_NA));
-	      set_c_function(expr, func);
-	      return(OPT_T);
-	    }
-	  if ((is_closure(func)) &&
-	      (closure_arity_to_int(sc, func) == 3) &&
-	      (!arglist_has_rest(sc, closure_args(func))))
-	    {
-	      set_unsafely_optimized(expr);
-	      set_optimize_op(expr, hop + ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_3A : OP_CLOSURE_3A));
-	      set_opt1_lambda_add(expr, func);
-	      return(OPT_F);
-	    }
-	  if ((is_closure_star(func)) &&
-	      (lambda_has_simple_defaults(func)) &&
-	      (closure_star_arity_to_int(sc, func) != 0) &&
-	      (closure_star_arity_to_int(sc, func) != 1))
-	    {
-	      set_unsafely_optimized(expr);
-	      if ((is_safe_closure(func)) && (closure_star_arity_to_int(sc, func) == 3))
-		set_optimize_op(expr, OP_SAFE_CLOSURE_STAR_3A);
-	      else set_optimize_op(expr, ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA));
-	      set_opt1_lambda_add(expr, func);
-	    }}
+          (is_fxable(sc, arg2)) &&
+          (is_fxable(sc, arg3)) &&
+          (s7_is_aritable(sc, func, 3)))
+        {
+          fx_annotate_args(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), 3);
+          if (is_c_function(func))
+            {
+              if (is_safe_procedure(func))
+                {
+                  set_safe_optimize_op(expr, hop + OP_SAFE_C_AAA);
+                  set_opt3_pair(cdr(expr), cdddr(expr));
+                  set_opt3_pair(expr, cddr(expr));
+                }
+              else set_safe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_NA : OP_C_NA));
+              set_c_function(expr, func);
+              return(OPT_T);
+            }
+          if ((is_closure(func)) &&
+              (closure_arity_to_int(sc, func) == 3) &&
+              (!arglist_has_rest(sc, closure_args(func))))
+            {
+              set_unsafely_optimized(expr);
+              set_optimize_op(expr, hop + ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_3A : OP_CLOSURE_3A));
+              set_opt1_lambda_add(expr, func);
+              return(OPT_F);
+            }
+          if ((is_closure_star(func)) &&
+              (lambda_has_simple_defaults(func)) &&
+              (closure_star_arity_to_int(sc, func) != 0) &&
+              (closure_star_arity_to_int(sc, func) != 1))
+            {
+              set_unsafely_optimized(expr);
+              if ((is_safe_closure(func)) && (closure_star_arity_to_int(sc, func) == 3))
+                set_optimize_op(expr, OP_SAFE_CLOSURE_STAR_3A);
+              else set_optimize_op(expr, ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA));
+              set_opt1_lambda_add(expr, func);
+            }}
       return(OPT_F);
     }  /* end of bad symbol wrappers */
 
@@ -72649,131 +72649,131 @@ static opt_t optimize_func_three_args(s7_scheme *sc, s7_pointer expr, s7_pointer
     {
       if (hop == 0) hop = hop_if_constant(sc, car(expr));
       if ((is_safe_procedure(func)) ||
-	  ((is_maybe_safe(func)) && (unsafe_is_safe(sc, arg3, e))))
-	{
-	  if (optimize_safe_c_func_three_args(sc, expr, func, hop, pairs, symbols, quotes, e) == OPT_T)
-	    return(OPT_T);
-	  if ((is_normal_symbol(arg1)) && (is_normal_symbol(arg2)))
-	    {
-	      set_opt3_pair(expr, arg3);
-	      set_unsafe_optimize_op(expr, hop + OP_SAFE_C_SSP); /* vector-set! in tbig apparently */
-	      choose_c_function(sc, expr, func, 3);
-	      return(OPT_F);
-	    }
-	  return(set_any_c_np(sc, func, expr, e, 3, hop + OP_SAFE_C_3P));
-	}
+          ((is_maybe_safe(func)) && (unsafe_is_safe(sc, arg3, e))))
+        {
+          if (optimize_safe_c_func_three_args(sc, expr, func, hop, pairs, symbols, quotes, e) == OPT_T)
+            return(OPT_T);
+          if ((is_normal_symbol(arg1)) && (is_normal_symbol(arg2)))
+            {
+              set_opt3_pair(expr, arg3);
+              set_unsafe_optimize_op(expr, hop + OP_SAFE_C_SSP); /* vector-set! in tbig apparently */
+              choose_c_function(sc, expr, func, 3);
+              return(OPT_F);
+            }
+          return(set_any_c_np(sc, func, expr, e, 3, hop + OP_SAFE_C_3P));
+        }
       /* func is not safe */
       if (fx_count(sc, expr) == 3)
-	{
-	  set_optimized(expr);
-	  fx_annotate_args(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), 3);
-	  if (is_semisafe(func))
-	    set_optimize_op(expr, hop + (((is_normal_symbol(arg1)) && (is_normal_symbol(arg3))) ? OP_CL_SAS : OP_CL_NA));
-	  else
-	    if ((fx_proc(cdr(expr)) == fx_c) && (fx_proc(cddr(expr)) == fx_c) && (fx_proc(cdddr(expr)) == fx_c))
-	      set_optimize_op(expr, hop + OP_C_NC);
-	    else set_optimize_op(expr, hop + OP_C_NA);
-	  choose_c_function(sc, expr, func, 3);
-	  set_unsafe(expr);
-	  return(OPT_F);
-	}
+        {
+          set_optimized(expr);
+          fx_annotate_args(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), 3);
+          if (is_semisafe(func))
+            set_optimize_op(expr, hop + (((is_normal_symbol(arg1)) && (is_normal_symbol(arg3))) ? OP_CL_SAS : OP_CL_NA));
+          else
+            if ((fx_proc(cdr(expr)) == fx_c) && (fx_proc(cddr(expr)) == fx_c) && (fx_proc(cdddr(expr)) == fx_c))
+              set_optimize_op(expr, hop + OP_C_NC);
+            else set_optimize_op(expr, hop + OP_C_NA);
+          choose_c_function(sc, expr, func, 3);
+          set_unsafe(expr);
+          return(OPT_F);
+        }
 
       /* (define (hi) (catch #t (lambda () 1) (lambda args 2)))
        *   first arg list must be (), second a symbol
        */
       if (c_function_call(func) == g_catch)
-	{
-	  if (((bad_pairs == 2) && (!is_pair(arg1))) ||
-	      ((bad_pairs == 3) && (is_quote(car(arg1)))))
-	    {
-	      s7_pointer body_lambda = arg2, error_lambda = arg3;
-	      if ((is_ok_lambda(sc, body_lambda)) &&
-		  (is_ok_lambda(sc, error_lambda)) &&
-		  (is_null(cadr(body_lambda))) &&
-		  (((is_symbol(cadr(error_lambda))) &&                /* (lambda args ... */
-		    (!is_probably_constant(cadr(error_lambda)))) ||
-		   ((is_pair(cadr(error_lambda))) &&                  /* (lambda (type info) ... */
-		    (is_pair(cdadr(error_lambda))) &&
-		    (is_null(cddadr(error_lambda))) &&
-		    (!is_probably_constant(caadr(error_lambda))) &&   /* (lambda (pi ...) ...) */
-		    (!is_probably_constant(cadadr(error_lambda))))))
-		{
-		  s7_pointer error_result = caddr(error_lambda);
-		  set_unsafely_optimized(expr);
-		  if ((arg1 == sc->T) &&                              /* tag is #t */
-		      (is_null(cdddr(error_lambda))) &&               /* error lambda body is one expr */
-		      ((!is_symbol(error_result)) ||                  /* (lambda args #f) */
-		       ((is_pair(cadr(error_lambda))) &&
-			(error_result == caadr(error_lambda)))) &&    /* (lambda (type info) type) */
-		      ((!is_pair(error_result)) ||
-		       (is_quote(car(error_result))) ||               /* (lambda args 'a) */
-		       ((car(error_result) == sc->car_symbol) &&
-			(is_pair(cdr(error_result))) &&               /* (lambda (type info) (car)) */
-			(cadr(error_result) == cadr(error_lambda))))) /* (lambda args (car args) -> error-type */
-		    {
-		      set_optimize_op(expr, OP_C_CATCH_ALL);          /* catch_all* = #t tag, error handling can skip to the simple lambda body */
-		      set_c_function(expr, func);
-
-		      if (is_pair(error_result))
-			error_result = (is_quote(car(error_result))) ? cadr(error_result) : sc->unused;
-		      else
-			if (is_symbol(error_result))
-			  error_result = sc->unused;
-		      set_opt2_con(expr, error_result);               /* for op_c_catch_all|_a -> stack */
-
-		      set_opt1_pair(cdr(expr), cddr(body_lambda));
-		      if (is_null(cdddr(body_lambda)))
-			{
-			  if (is_fxable(sc, caddr(body_lambda)))
-			    {
-			      set_optimize_op(expr, OP_C_CATCH_ALL_A);
-			      set_fx_direct(cddr(body_lambda), fx_choose(sc, cddr(body_lambda), sc->curlet, let_symbol_is_safe));
-			    }
-			  else
-			    {
-			      set_opt1_pair(cdr(expr), caddr(body_lambda));
-			      set_optimize_op(expr, OP_C_CATCH_ALL_O);
-			      /* fn got no hits */
-			    }}}
-		  else
-		    {
-		      set_optimize_op(expr, OP_C_CATCH); /* mainly c_catch_p, but this is not a common case */
-		      choose_c_function(sc, expr, func, 3);
-		    }
-		  return(OPT_F);
-		}}}
+        {
+          if (((bad_pairs == 2) && (!is_pair(arg1))) ||
+              ((bad_pairs == 3) && (is_quote(car(arg1)))))
+            {
+              s7_pointer body_lambda = arg2, error_lambda = arg3;
+              if ((is_ok_lambda(sc, body_lambda)) &&
+                  (is_ok_lambda(sc, error_lambda)) &&
+                  (is_null(cadr(body_lambda))) &&
+                  (((is_symbol(cadr(error_lambda))) &&                /* (lambda args ... */
+                    (!is_probably_constant(cadr(error_lambda)))) ||
+                   ((is_pair(cadr(error_lambda))) &&                  /* (lambda (type info) ... */
+                    (is_pair(cdadr(error_lambda))) &&
+                    (is_null(cddadr(error_lambda))) &&
+                    (!is_probably_constant(caadr(error_lambda))) &&   /* (lambda (pi ...) ...) */
+                    (!is_probably_constant(cadadr(error_lambda))))))
+                {
+                  s7_pointer error_result = caddr(error_lambda);
+                  set_unsafely_optimized(expr);
+                  if ((arg1 == sc->T) &&                              /* tag is #t */
+                      (is_null(cdddr(error_lambda))) &&               /* error lambda body is one expr */
+                      ((!is_symbol(error_result)) ||                  /* (lambda args #f) */
+                       ((is_pair(cadr(error_lambda))) &&
+                        (error_result == caadr(error_lambda)))) &&    /* (lambda (type info) type) */
+                      ((!is_pair(error_result)) ||
+                       (is_quote(car(error_result))) ||               /* (lambda args 'a) */
+                       ((car(error_result) == sc->car_symbol) &&
+                        (is_pair(cdr(error_result))) &&               /* (lambda (type info) (car)) */
+                        (cadr(error_result) == cadr(error_lambda))))) /* (lambda args (car args) -> error-type */
+                    {
+                      set_optimize_op(expr, OP_C_CATCH_ALL);          /* catch_all* = #t tag, error handling can skip to the simple lambda body */
+                      set_c_function(expr, func);
+
+                      if (is_pair(error_result))
+                        error_result = (is_quote(car(error_result))) ? cadr(error_result) : sc->unused;
+                      else
+                        if (is_symbol(error_result))
+                          error_result = sc->unused;
+                      set_opt2_con(expr, error_result);               /* for op_c_catch_all|_a -> stack */
+
+                      set_opt1_pair(cdr(expr), cddr(body_lambda));
+                      if (is_null(cdddr(body_lambda)))
+                        {
+                          if (is_fxable(sc, caddr(body_lambda)))
+                            {
+                              set_optimize_op(expr, OP_C_CATCH_ALL_A);
+                              set_fx_direct(cddr(body_lambda), fx_choose(sc, cddr(body_lambda), sc->curlet, let_symbol_is_safe));
+                            }
+                          else
+                            {
+                              set_opt1_pair(cdr(expr), caddr(body_lambda));
+                              set_optimize_op(expr, OP_C_CATCH_ALL_O);
+                              /* fn got no hits */
+                            }}}
+                  else
+                    {
+                      set_optimize_op(expr, OP_C_CATCH); /* mainly c_catch_p, but this is not a common case */
+                      choose_c_function(sc, expr, func, 3);
+                    }
+                  return(OPT_F);
+                }}}
 
       if ((is_semisafe(func)) &&
-	  (is_symbol(car(expr))) && (car(expr) != sc->values_symbol) &&
-	  (is_fxable(sc, arg2)) && (is_fxable(sc, arg3)) &&
-	  (is_pair(arg1)) && (car(arg1) == sc->lambda_symbol))
-	{
-	  choose_c_function(sc, expr, func, 3);
-	  if (((fn_proc(expr) == g_for_each) || (fn_proc(expr) == g_map)) &&
-	      (is_proper_list_2(sc, cadr(arg1))) &&                                /* two parameters */
-	      (is_symbol(caadr(arg1))) && (!is_possibly_constant(caadr(arg1))) &&  /* parameter name not trouble */
-	      (is_symbol(cadadr(arg1))) && (!is_possibly_constant(cadadr(arg1))))
-	    {
-	      fx_annotate_args(sc, cddr(expr), e);
-	      check_lambda(sc, arg1, true);        /* this changes symbol_list */
-
-	      clear_symbol_list(sc);               /* so restore it */
-	      for (s7_pointer p = e; is_pair(p); p = cdr(p))
-		if (is_normal_symbol(car(p)))
-		  add_symbol_to_list(sc, car(p));
-
-	      set_fn(expr, (fn_proc(expr) == g_for_each) ? g_for_each_closure_2 : NULL);
-	      set_opt3_pair(expr, cdr(arg1));
-	      set_unsafe_optimize_op(expr, OP_MAP_FOR_EACH_FAA);
-	      return(OPT_F);
-	    }}
+          (is_symbol(car(expr))) && (car(expr) != sc->values_symbol) &&
+          (is_fxable(sc, arg2)) && (is_fxable(sc, arg3)) &&
+          (is_pair(arg1)) && (car(arg1) == sc->lambda_symbol))
+        {
+          choose_c_function(sc, expr, func, 3);
+          if (((fn_proc(expr) == g_for_each) || (fn_proc(expr) == g_map)) &&
+              (is_proper_list_2(sc, cadr(arg1))) &&                                /* two parameters */
+              (is_symbol(caadr(arg1))) && (!is_possibly_constant(caadr(arg1))) &&  /* parameter name not trouble */
+              (is_symbol(cadadr(arg1))) && (!is_possibly_constant(cadadr(arg1))))
+            {
+              fx_annotate_args(sc, cddr(expr), e);
+              check_lambda(sc, arg1, true);        /* this changes symbol_list */
+
+              clear_symbol_list(sc);               /* so restore it */
+              for (s7_pointer p = e; is_pair(p); p = cdr(p))
+                if (is_normal_symbol(car(p)))
+                  add_symbol_to_list(sc, car(p));
+
+              set_fn(expr, (fn_proc(expr) == g_for_each) ? g_for_each_closure_2 : NULL);
+              set_opt3_pair(expr, cdr(arg1));
+              set_unsafe_optimize_op(expr, OP_MAP_FOR_EACH_FAA);
+              return(OPT_F);
+            }}
 
       if ((is_safe_procedure(func)) ||
-	  ((is_semisafe(func)) &&
-	   (((car(expr) != sc->assoc_symbol) && (car(expr) != sc->member_symbol)) ||
-	    (unsafe_is_safe(sc, arg3, e)))))
-	return(set_any_c_np(sc, func, expr, e, 3, hop + OP_SAFE_C_3P));
+          ((is_semisafe(func)) &&
+           (((car(expr) != sc->assoc_symbol) && (car(expr) != sc->member_symbol)) ||
+            (unsafe_is_safe(sc, arg3, e)))))
+        return(set_any_c_np(sc, func, expr, e, 3, hop + OP_SAFE_C_3P));
       return(set_any_c_np(sc, func, expr, e, 3, hop + OP_ANY_C_NP));
     }
 
@@ -72782,90 +72782,90 @@ static opt_t optimize_func_three_args(s7_scheme *sc, s7_pointer expr, s7_pointer
     {
       int32_t arit = closure_arity_to_int(sc, func);
       if (arit != 3)
-	{
-	  if (is_symbol(closure_args(func)))
-	    return(optimize_closure_sym(sc, expr, func, hop, 3, e));
-	  return(OPT_F);
-	}
+        {
+          if (is_symbol(closure_args(func)))
+            return(optimize_closure_sym(sc, expr, func, hop, 3, e));
+          return(OPT_F);
+        }
       if (is_immutable(func)) hop = 1;
 
       if (symbols == 3)
-	{
-	  s7_pointer body = closure_body(func);
-	  bool one_form = is_null(cdr(body));
-	  set_opt1_lambda_add(expr, func);
-	  set_opt3_arglen(cdr(expr), 3);
-
-	  if (is_safe_closure(func))
-	    {
-	      if ((one_form) &&
-		  (is_fxable(sc, car(body))))
-		{
-		  set_opt2_sym(expr, arg2);
-		  set_opt3_sym(expr, arg3);
-		  fx_annotate_arg(sc, body, e);
-		  fx_tree(sc, body, car(closure_args(func)), cadr(closure_args(func)), caddr(closure_args(func)), false);
-		  set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_3S_A);
-		  set_closure_one_form_fx_arg(func);
-		}
-	      else set_optimize_op(expr, hop + OP_SAFE_CLOSURE_3S);
-	      return(OPT_T);
-	    }
-	  set_unsafe_optimize_op(expr, hop + ((one_form) ? OP_CLOSURE_3S_O : OP_CLOSURE_3S));
-	  return(OPT_F);
-	}
+        {
+          s7_pointer body = closure_body(func);
+          bool one_form = is_null(cdr(body));
+          set_opt1_lambda_add(expr, func);
+          set_opt3_arglen(cdr(expr), 3);
+
+          if (is_safe_closure(func))
+            {
+              if ((one_form) &&
+                  (is_fxable(sc, car(body))))
+                {
+                  set_opt2_sym(expr, arg2);
+                  set_opt3_sym(expr, arg3);
+                  fx_annotate_arg(sc, body, e);
+                  fx_tree(sc, body, car(closure_args(func)), cadr(closure_args(func)), caddr(closure_args(func)), false);
+                  set_safe_optimize_op(expr, hop + OP_SAFE_CLOSURE_3S_A);
+                  set_closure_one_form_fx_arg(func);
+                }
+              else set_optimize_op(expr, hop + OP_SAFE_CLOSURE_3S);
+              return(OPT_T);
+            }
+          set_unsafe_optimize_op(expr, hop + ((one_form) ? OP_CLOSURE_3S_O : OP_CLOSURE_3S));
+          return(OPT_F);
+        }
 
       if (fx_count(sc, expr) == 3)
-	{
-	  if (is_safe_closure(func))
-	    {
-	      if ((!is_pair(arg2)) && (!is_pair(arg3)))
-		set_optimize_op(expr, hop + OP_SAFE_CLOSURE_AGG);
-	      else
-		if (is_normal_symbol(arg1))
-		  set_optimize_op(expr, hop + ((is_normal_symbol(arg2)) ? OP_SAFE_CLOSURE_SSA : OP_SAFE_CLOSURE_SAA));
-		else set_optimize_op(expr, hop + OP_SAFE_CLOSURE_3A);
-	    }
-	  else
-	    if ((is_normal_symbol(arg2)) && (is_normal_symbol(arg3)))
-	      set_optimize_op(expr, hop + OP_CLOSURE_ASS);
-	    else
-	      if (is_normal_symbol(arg1))
-		set_optimize_op(expr, hop + ((is_normal_symbol(arg3)) ? OP_CLOSURE_SAS : OP_CLOSURE_SAA));
-	      else
-		if (is_normal_symbol(arg3))
-		  set_optimize_op(expr, hop + OP_CLOSURE_AAS);
-		else set_optimize_op(expr, hop + ((is_normal_symbol(arg2)) ?  OP_CLOSURE_ASA : OP_CLOSURE_3A));
-	  set_unsafely_optimized(expr);
-	  fx_annotate_args(sc, cdr(expr), e);
-
-	  if (is_fx_treeable(cdr(expr)))
-	    fx_tree(sc, closure_body(func), car(closure_args(func)), cadr(closure_args(func)), caddr(closure_args(func)), false);
-
-	  set_opt1_lambda_add(expr, func);
-	  set_opt3_arglen(cdr(expr), 3);
-	  return(OPT_F);
-	}
+        {
+          if (is_safe_closure(func))
+            {
+              if ((!is_pair(arg2)) && (!is_pair(arg3)))
+                set_optimize_op(expr, hop + OP_SAFE_CLOSURE_AGG);
+              else
+                if (is_normal_symbol(arg1))
+                  set_optimize_op(expr, hop + ((is_normal_symbol(arg2)) ? OP_SAFE_CLOSURE_SSA : OP_SAFE_CLOSURE_SAA));
+                else set_optimize_op(expr, hop + OP_SAFE_CLOSURE_3A);
+            }
+          else
+            if ((is_normal_symbol(arg2)) && (is_normal_symbol(arg3)))
+              set_optimize_op(expr, hop + OP_CLOSURE_ASS);
+            else
+              if (is_normal_symbol(arg1))
+                set_optimize_op(expr, hop + ((is_normal_symbol(arg3)) ? OP_CLOSURE_SAS : OP_CLOSURE_SAA));
+              else
+                if (is_normal_symbol(arg3))
+                  set_optimize_op(expr, hop + OP_CLOSURE_AAS);
+                else set_optimize_op(expr, hop + ((is_normal_symbol(arg2)) ?  OP_CLOSURE_ASA : OP_CLOSURE_3A));
+          set_unsafely_optimized(expr);
+          fx_annotate_args(sc, cdr(expr), e);
+
+          if (is_fx_treeable(cdr(expr)))
+            fx_tree(sc, closure_body(func), car(closure_args(func)), cadr(closure_args(func)), caddr(closure_args(func)), false);
+
+          set_opt1_lambda_add(expr, func);
+          set_opt3_arglen(cdr(expr), 3);
+          return(OPT_F);
+        }
       return(set_any_closure_np(sc, func, expr, e, 3, hop + OP_ANY_CLOSURE_3P));
     }
 
   if (is_closure_star(func))
     {
       if ((!lambda_has_simple_defaults(func)) ||
-	  (closure_star_arity_to_int(sc, func) == 0) ||
-	  (closure_star_arity_to_int(sc, func) == 1))
-	return(OPT_F);
+          (closure_star_arity_to_int(sc, func) == 0) ||
+          (closure_star_arity_to_int(sc, func) == 1))
+        return(OPT_F);
       if (fx_count(sc, expr) == 3)
-	{
-	  if (is_immutable(func)) hop = 1;
-	  if ((is_safe_closure(func)) && (closure_star_arity_to_int(sc, func) == 3))
-	    set_optimize_op(expr, OP_SAFE_CLOSURE_STAR_3A);
-	  else set_unsafe_optimize_op(expr, hop + ((is_safe_closure(func) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA)));
-	  fx_annotate_args(sc, cdr(expr), e);
-	  set_opt1_lambda_add(expr, func);
-	  set_opt3_arglen(cdr(expr), 3);
-	  return(OPT_F);
-	}}
+        {
+          if (is_immutable(func)) hop = 1;
+          if ((is_safe_closure(func)) && (closure_star_arity_to_int(sc, func) == 3))
+            set_optimize_op(expr, OP_SAFE_CLOSURE_STAR_3A);
+          else set_unsafe_optimize_op(expr, hop + ((is_safe_closure(func) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA)));
+          fx_annotate_args(sc, cdr(expr), e);
+          set_opt1_lambda_add(expr, func);
+          set_opt3_arglen(cdr(expr), 3);
+          return(OPT_F);
+        }}
 
   if ((is_c_function_star(func)) &&
       (fx_count(sc, expr) == 3) &&
@@ -72889,90 +72889,90 @@ static bool symbols_are_safe(s7_scheme *sc, s7_pointer args, s7_pointer e)
     {
       s7_pointer arg = car(p);
       if ((is_normal_symbol(arg)) &&
-	  (!arg_findable(sc, arg, e)))
-	return(false);
+          (!arg_findable(sc, arg, e)))
+        return(false);
     }
   return(true);
 }
 
 static opt_t optimize_func_many_args(s7_scheme *sc, s7_pointer expr, s7_pointer func, int32_t hop, int32_t args,
-				     int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
+                                     int32_t pairs, int32_t symbols, int32_t quotes, int32_t bad_pairs, s7_pointer e)
 {
   bool func_is_closure;
   if (quotes > 0)
     {
       if (direct_memq(sc->quote_symbol, e))
-	return(OPT_OOPS);
+        return(OPT_OOPS);
       if ((bad_pairs == quotes) &&
-	  (is_symbol(car(expr))) &&
-	  (is_constant_symbol(sc, car(expr))))
-	hop = 1;
+          (is_symbol(car(expr))) &&
+          (is_constant_symbol(sc, car(expr))))
+        hop = 1;
     }
   if ((is_c_function(func)) && (c_function_is_aritable(func, args)))
     {
       if (hop == 0) hop = hop_if_constant(sc, car(expr));
       if (is_safe_procedure(func))
-	{
-	  if (pairs == 0)
-	    {
-	      if (symbols == 0)
-		{
-		  set_safe_optimize_op(expr, hop + OP_SAFE_C_NC);
-		  choose_c_function(sc, expr, func, args);
-		  return(OPT_T);
-		}
-	      if (symbols == args)
-		{
-		  if (symbols_are_safe(sc, cdr(expr), e))
-		    set_safe_optimize_op(expr, hop + OP_SAFE_C_NS);
-		  else
-		    {
-		      set_safe_optimize_op(expr, hop + ((args == 4) ? OP_SAFE_C_4A : OP_SAFE_C_NA));
-		      fx_annotate_args(sc, cdr(expr), e);
-		    }
-		  set_opt3_arglen(cdr(expr), args);
-		  choose_c_function(sc, expr, func, args);
-		  return(OPT_T);
-		}}
-
-	  if (fx_count(sc, expr) == args)
-	    {
-	      s7_pointer p;
-	      set_optimized(expr);
-	      set_optimize_op(expr, hop + ((args == 4) ? OP_SAFE_C_4A : OP_SAFE_C_NA));
-	      fx_annotate_args(sc, cdr(expr), e);
-	      set_opt3_arglen(cdr(expr), args);
-	      choose_c_function(sc, expr, func, args);
-
-	      for (p = cdr(expr); (is_pair(p)) && (is_pair(cdr(p))); p = cddr(p))
-		{
-		  if (is_normal_symbol(car(p)))
-		    break;
-		  if ((is_pair(car(p))) &&
-		      ((!is_pair(cdar(p))) || (!is_quote(caar(p)))))
-		    break;
-		}
-	      if (is_null(p))
-		{
-		  set_optimize_op(expr, hop + OP_SAFE_C_ALL_CA);
-		  for (p = cdr(expr); is_pair(p); p = cddr(p))
-		    {
-		      clear_has_fx(p);
-		      set_opt2_con(p, (is_pair(car(p))) ? cadar(p) : car(p));
-		    }}
-	      return(OPT_T);
-	    }
-	  return(set_any_c_np(sc, func, expr, e, args, hop + OP_ANY_C_NP));
-	}
+        {
+          if (pairs == 0)
+            {
+              if (symbols == 0)
+                {
+                  set_safe_optimize_op(expr, hop + OP_SAFE_C_NC);
+                  choose_c_function(sc, expr, func, args);
+                  return(OPT_T);
+                }
+              if (symbols == args)
+                {
+                  if (symbols_are_safe(sc, cdr(expr), e))
+                    set_safe_optimize_op(expr, hop + OP_SAFE_C_NS);
+                  else
+                    {
+                      set_safe_optimize_op(expr, hop + ((args == 4) ? OP_SAFE_C_4A : OP_SAFE_C_NA));
+                      fx_annotate_args(sc, cdr(expr), e);
+                    }
+                  set_opt3_arglen(cdr(expr), args);
+                  choose_c_function(sc, expr, func, args);
+                  return(OPT_T);
+                }}
+
+          if (fx_count(sc, expr) == args)
+            {
+              s7_pointer p;
+              set_optimized(expr);
+              set_optimize_op(expr, hop + ((args == 4) ? OP_SAFE_C_4A : OP_SAFE_C_NA));
+              fx_annotate_args(sc, cdr(expr), e);
+              set_opt3_arglen(cdr(expr), args);
+              choose_c_function(sc, expr, func, args);
+
+              for (p = cdr(expr); (is_pair(p)) && (is_pair(cdr(p))); p = cddr(p))
+                {
+                  if (is_normal_symbol(car(p)))
+                    break;
+                  if ((is_pair(car(p))) &&
+                      ((!is_pair(cdar(p))) || (!is_quote(caar(p)))))
+                    break;
+                }
+              if (is_null(p))
+                {
+                  set_optimize_op(expr, hop + OP_SAFE_C_ALL_CA);
+                  for (p = cdr(expr); is_pair(p); p = cddr(p))
+                    {
+                      clear_has_fx(p);
+                      set_opt2_con(p, (is_pair(car(p))) ? cadar(p) : car(p));
+                    }}
+              return(OPT_T);
+            }
+          return(set_any_c_np(sc, func, expr, e, args, hop + OP_ANY_C_NP));
+        }
       /* c_func is not safe */
       if (fx_count(sc, expr) == args) /* trigger_size doesn't matter for unsafe funcs */
-	{
-	  fx_annotate_args(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), args);
-	  set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_NA : OP_C_NA));
-	  choose_c_function(sc, expr, func, args);
-	  return(OPT_F);
-	}
+        {
+          fx_annotate_args(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), args);
+          set_unsafe_optimize_op(expr, hop + ((is_semisafe(func)) ? OP_CL_NA : OP_C_NA));
+          choose_c_function(sc, expr, func, args);
+          return(OPT_F);
+        }
       return(set_any_c_np(sc, func, expr, e, args, hop + OP_ANY_C_NP)); /* was num_args=3! 2-Sep-20 */
     }
 
@@ -72981,34 +72981,34 @@ static opt_t optimize_func_many_args(s7_scheme *sc, s7_pointer expr, s7_pointer
     {
       int32_t arit = closure_arity_to_int(sc, func);
       if (arit != args)
-	{
-	  if (is_symbol(closure_args(func)))
-	    return(optimize_closure_sym(sc, expr, func, hop, args, e));
-	  return(OPT_F);
-	}
+        {
+          if (is_symbol(closure_args(func)))
+            return(optimize_closure_sym(sc, expr, func, hop, args, e));
+          return(OPT_F);
+        }
       if (is_immutable(func)) hop = 1;
 
       if (fx_count(sc, expr) == args)
-	{
-	  bool safe_case = is_safe_closure(func);
-	  set_unsafely_optimized(expr);
-	  set_unsafe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_NA : ((args == 4) ? OP_CLOSURE_4A : OP_CLOSURE_NA)));
-	  fx_annotate_args(sc, cdr(expr), e);
-	  set_opt3_arglen(cdr(expr), args);
-	  set_opt1_lambda_add(expr, func);
-
-	  if ((symbols == args) &&
-	      (symbols_are_safe(sc, cdr(expr), e)))
-	    {
-	      if (safe_case)
-		set_optimize_op(expr, hop + OP_SAFE_CLOSURE_NS);
-	      else set_optimize_op(expr, hop + ((args == 4) ? ((is_null(cdr(closure_body(func)))) ? OP_CLOSURE_4S_O : OP_CLOSURE_4S) :
-						((args == 5) ? OP_CLOSURE_5S : OP_CLOSURE_NS)));
-	    }
-	  return(OPT_F);
-	}
+        {
+          bool safe_case = is_safe_closure(func);
+          set_unsafely_optimized(expr);
+          set_unsafe_optimize_op(expr, hop + ((safe_case) ? OP_SAFE_CLOSURE_NA : ((args == 4) ? OP_CLOSURE_4A : OP_CLOSURE_NA)));
+          fx_annotate_args(sc, cdr(expr), e);
+          set_opt3_arglen(cdr(expr), args);
+          set_opt1_lambda_add(expr, func);
+
+          if ((symbols == args) &&
+              (symbols_are_safe(sc, cdr(expr), e)))
+            {
+              if (safe_case)
+                set_optimize_op(expr, hop + OP_SAFE_CLOSURE_NS);
+              else set_optimize_op(expr, hop + ((args == 4) ? ((is_null(cdr(closure_body(func)))) ? OP_CLOSURE_4S_O : OP_CLOSURE_4S) :
+                                                ((args == 5) ? OP_CLOSURE_5S : OP_CLOSURE_NS)));
+            }
+          return(OPT_F);
+        }
       if (args == 4)
-	return(set_any_closure_np(sc, func, expr, e, 4, hop + OP_ANY_CLOSURE_4P));
+        return(set_any_closure_np(sc, func, expr, e, 4, hop + OP_ANY_CLOSURE_4P));
       return(set_any_closure_np(sc, func, expr, e, args, hop + OP_ANY_CLOSURE_NP));
     }
 
@@ -73035,7 +73035,7 @@ static opt_t optimize_func_many_args(s7_scheme *sc, s7_pointer expr, s7_pointer
     {
       set_unsafely_optimized(expr);
       if (func_is_closure)
-	set_optimize_op(expr, hop + ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_NA : ((args == 4) ? OP_CLOSURE_4A : OP_CLOSURE_NA)));
+        set_optimize_op(expr, hop + ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_NA : ((args == 4) ? OP_CLOSURE_4A : OP_CLOSURE_NA)));
       else set_optimize_op(expr, hop + ((is_safe_closure(func)) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA));
       fx_annotate_args(sc, cdr(expr), e);
       set_opt3_arglen(cdr(expr), args);
@@ -73051,10 +73051,10 @@ static bool vars_syntax_ok(s7_pointer vars)
     {
       s7_pointer var = car(p);
       if ((!is_pair(var)) ||
-	  (!is_symbol(car(var))) ||
-	  (!is_pair(cdr(var))) ||
-	  (is_pair(cddr(var))))
-	return(false);
+          (!is_symbol(car(var))) ||
+          (!is_pair(cdr(var))) ||
+          (is_pair(cddr(var))))
+        return(false);
     }
   return(true);
 }
@@ -73070,15 +73070,15 @@ static bool vars_opt_ok(s7_scheme *sc, s7_pointer vars, int32_t hop, s7_pointer
       s7_pointer init = cadr(var);
       /* if ((is_slot(global_slot(car(var)))) && (is_c_function(global_value(car(var))))) return(false); */ /* too draconian (see snd-test) */
       if ((is_normal_symbol(car(var))) && (is_global(car(var)))) /* (define (f) (let ((+ -)) (with-let (curlet) (#_integer? (+))))) (f) */
-	{
-	  s7_int old_pl = sc->print_length;
-	  sc->print_length = 80;
-	  /* fprintf(stderr, "set %s local in %s\n", display(car(var)), display_truncated(vars)); */
-	  /* locals in tall: initial_dur, bump, fft_window ?? none of these look problematic! */
-	  sc->print_length = old_pl;
-	  set_local(car(var));
-	  return(false);
-	}
+        {
+          s7_int old_pl = sc->print_length;
+          sc->print_length = 80;
+          /* fprintf(stderr, "set %s local in %s\n", display(car(var)), display_truncated(vars)); */
+          /* locals in tall: initial_dur, bump, fft_window ?? none of these look problematic! */
+          sc->print_length = old_pl;
+          set_local(car(var));
+          return(false);
+        }
       /* also too draconian (tall for example) but +/- above is broken now (returns #t)
        *   perhaps set_local could be undone upon leaving the let if there's no capture possible
        */
@@ -73086,9 +73086,9 @@ static bool vars_opt_ok(s7_scheme *sc, s7_pointer vars, int32_t hop, s7_pointer
       s7_pointer init = cadar(p);
 #endif
       if ((is_pair(init)) &&
-	  (!is_checked(init)) &&
-	  (optimize_expression(sc, init, hop, e, false) == OPT_OOPS))
-	return(false);
+          (!is_checked(init)) &&
+          (optimize_expression(sc, init, hop, e, false) == OPT_OOPS))
+        return(false);
     }
   return(true);
 }
@@ -73110,57 +73110,57 @@ static opt_t optimize_syntax(s7_scheme *sc, s7_pointer expr, s7_pointer func, in
     case OP_LET: case OP_LETREC:
     case OP_LET_STAR: case OP_LETREC_STAR:
       if (is_symbol(cadr(expr)))
-	{
-	  if (!is_pair(cddr(expr))) /* (let name . x) */
-	    return(OPT_F);
-	  vars = caddr(expr);
-	  if (!is_list(vars)) return(OPT_OOPS);
-	  body = cdddr(expr);
-	}
+        {
+          if (!is_pair(cddr(expr))) /* (let name . x) */
+            return(OPT_F);
+          vars = caddr(expr);
+          if (!is_list(vars)) return(OPT_OOPS);
+          body = cdddr(expr);
+        }
       else
-	{
-	  vars = cadr(expr);
-	  body = cddr(expr);
-	  if (is_null(vars))
-	    e = cons(sc, sc->nil, e); /* () in e = empty let */
-	  else
-	    if (!is_pair(vars))
-	      return(OPT_OOPS);
-	}
+        {
+          vars = cadr(expr);
+          body = cddr(expr);
+          if (is_null(vars))
+            e = cons(sc, sc->nil, e); /* () in e = empty let */
+          else
+            if (!is_pair(vars))
+              return(OPT_OOPS);
+        }
       if (!is_pair(body)) return(OPT_OOPS);
 
       if (!vars_syntax_ok(vars))
-	return(OPT_OOPS);
+        return(OPT_OOPS);
 
       if ((op == OP_LETREC) || (op == OP_LETREC_STAR))
-	{
-	  e = collect_variables(sc, vars, e);
-	  if (!vars_opt_ok(sc, vars, hop, e))
-	    return(OPT_OOPS);
-	}
+        {
+          e = collect_variables(sc, vars, e);
+          if (!vars_opt_ok(sc, vars, hop, e))
+            return(OPT_OOPS);
+        }
       else
-	if (op == OP_LET)
-	  {
-	    if (!vars_opt_ok(sc, vars, hop, e))
-	      return(OPT_OOPS);
-	    e = collect_variables(sc, vars, e);
-	  }
-	else
-	  for (s7_pointer p = vars; is_pair(p); p = cdr(p))
-	    {
-	      s7_pointer var = car(p);
-	      if ((is_pair(cadr(var))) &&
-		  (!is_checked(cadr(var))) &&
-		  (optimize_expression(sc, cadr(var), hop, e, false) == OPT_OOPS))
-		return(OPT_OOPS);
-	      e = cons(sc, add_symbol_to_list(sc, car(var)), e);
-	      sc->w = e;
-	    }
+        if (op == OP_LET)
+          {
+            if (!vars_opt_ok(sc, vars, hop, e))
+              return(OPT_OOPS);
+            e = collect_variables(sc, vars, e);
+          }
+        else
+          for (s7_pointer p = vars; is_pair(p); p = cdr(p))
+            {
+              s7_pointer var = car(p);
+              if ((is_pair(cadr(var))) &&
+                  (!is_checked(cadr(var))) &&
+                  (optimize_expression(sc, cadr(var), hop, e, false) == OPT_OOPS))
+                return(OPT_OOPS);
+              e = cons(sc, add_symbol_to_list(sc, car(var)), e);
+              sc->w = e;
+            }
       if (is_symbol(cadr(expr)))
-	{
-	  e = cons(sc, add_symbol_to_list(sc, cadr(expr)), e);
-	  sc->w = e;
-	}
+        {
+          e = cons(sc, add_symbol_to_list(sc, cadr(expr)), e);
+          sc->w = e;
+        }
       break;
 
     case OP_LET_TEMPORARILY:
@@ -73168,15 +73168,15 @@ static opt_t optimize_syntax(s7_scheme *sc, s7_pointer expr, s7_pointer func, in
       if (!is_list(vars)) return(OPT_OOPS);
       body = cddr(expr);
       for (s7_pointer p = vars; is_pair(p); p = cdr(p))
-	{
-	  s7_pointer var = car(vars);
-	  if ((is_pair(var)) &&
-	      (is_pair(cdr(var))) &&
-	      (is_pair(cadr(var))) &&
-	      (!is_checked(cadr(var))) &&
-	      (optimize_expression(sc, cadr(var), hop, e, false) == OPT_OOPS))
-	    return(OPT_OOPS);
-	}
+        {
+          s7_pointer var = car(vars);
+          if ((is_pair(var)) &&
+              (is_pair(cdr(var))) &&
+              (is_pair(cadr(var))) &&
+              (!is_checked(cadr(var))) &&
+              (optimize_expression(sc, cadr(var), hop, e, false) == OPT_OOPS))
+            return(OPT_OOPS);
+        }
       /* e = cons(sc, sc->nil, e); */ /* !? currently let-temporarily does not make a new let, so it is like begin? */
       body_export_ok = export_ok;     /* (list x (let-temporarily () (define x 0))) just as in begin */
       break;
@@ -73184,34 +73184,34 @@ static opt_t optimize_syntax(s7_scheme *sc, s7_pointer expr, s7_pointer func, in
     case OP_DO:
       vars = cadr(expr);
       if (is_null(vars))
-	e = cons(sc, sc->nil, e);
+        e = cons(sc, sc->nil, e);
       else
-	if (!is_pair(vars))
-	  return(OPT_OOPS);
+        if (!is_pair(vars))
+          return(OPT_OOPS);
       body = cddr(expr);
 
       for (s7_pointer p = vars; is_pair(p); p = cdr(p))
-	{
-	  s7_pointer var = car(p);
-	  if ((!is_pair(var)) ||
-	      (!is_symbol(car(var))) ||
-	      (!is_pair(cdr(var))))
-	    return(OPT_OOPS);
-	  if ((is_pair(cadr(var))) &&
-	      (!is_checked(cadr(var))) &&
-	      (optimize_expression(sc, cadr(var), hop, e, false) == OPT_OOPS)) /* the init field -- locals are not defined yet */
-	    return(OPT_OOPS);
-	}
+        {
+          s7_pointer var = car(p);
+          if ((!is_pair(var)) ||
+              (!is_symbol(car(var))) ||
+              (!is_pair(cdr(var))))
+            return(OPT_OOPS);
+          if ((is_pair(cadr(var))) &&
+              (!is_checked(cadr(var))) &&
+              (optimize_expression(sc, cadr(var), hop, e, false) == OPT_OOPS)) /* the init field -- locals are not defined yet */
+            return(OPT_OOPS);
+        }
       e = collect_variables(sc, vars, e);
       for (s7_pointer p = vars; is_pair(p); p = cdr(p))
-	{
-	  s7_pointer var = cddar(p);
-	  if ((is_pair(var)) &&
-	      (is_pair(car(var))) &&
-	      (!is_checked(car(var))) &&
-	      (optimize_expression(sc, car(var), hop, e, false) == OPT_OOPS)) /* the step field -- locals are defined */
-	    return(OPT_OOPS);
-	}
+        {
+          s7_pointer var = cddar(p);
+          if ((is_pair(var)) &&
+              (is_pair(car(var))) &&
+              (!is_checked(car(var))) &&
+              (optimize_expression(sc, car(var), hop, e, false) == OPT_OOPS)) /* the step field -- locals are defined */
+            return(OPT_OOPS);
+        }
       break;
 
     case OP_BEGIN:
@@ -73241,95 +73241,95 @@ static opt_t optimize_syntax(s7_scheme *sc, s7_pointer expr, s7_pointer func, in
       vars = cadr(expr);
       body = cddr(expr);
       if (is_pair(vars))
-	{
-	  if ((export_ok) &&
-	      (is_symbol(car(vars))))
-	    {
-	      add_symbol_to_list(sc, car(vars));
-	      if (is_pair(e))
-		{
-		  if (car(e) != sc->if_keyword)
-		    set_cdr(e, cons(sc, car(vars), cdr(e))); /* export it */
-		  else add_symbol_to_list(sc, symbol_to_keyword(sc, car(vars)));
-		}
-	      else e = cons(sc, car(vars), e);
-	    }
-	  e = collect_parameters(sc, cdr(vars), e);
-	  body_export_ok = export_ok;
-	}
+        {
+          if ((export_ok) &&
+              (is_symbol(car(vars))))
+            {
+              add_symbol_to_list(sc, car(vars));
+              if (is_pair(e))
+                {
+                  if (car(e) != sc->if_keyword)
+                    set_cdr(e, cons(sc, car(vars), cdr(e))); /* export it */
+                  else add_symbol_to_list(sc, symbol_to_keyword(sc, car(vars)));
+                }
+              else e = cons(sc, car(vars), e);
+            }
+          e = collect_parameters(sc, cdr(vars), e);
+          body_export_ok = export_ok;
+        }
       else
-	{
-	  if ((export_ok) &&
-	      (is_symbol(vars)))
-	    {
-	      /* actually if this is defining a function, the name should probably be included in the local let
-	       *   but that's next-to-impossible to guarantee unless it's (define x (lambda...)) of course.
-	       */
-	      sc->temp9 = e;
-	      for (s7_pointer p = body; is_pair(p); p = cdr(p))
-		if ((is_pair(car(p))) &&
-		    (!is_checked(car(p))) && /* ((full_type(p) & (TYPE_MASK | T_CHECKED)) == T_PAIR) is not faster */
-		    (optimize_expression(sc, car(p), hop, e, false) == OPT_OOPS)) /* "body" here is not body in terms of export_ok */
-		  {
-		    sc->temp9 = sc->unused;
-		    return(OPT_OOPS);
-		  }
-	      sc->temp9 = sc->unused;
-
-	      add_symbol_to_list(sc, vars);
-	      if (is_pair(e))
-		{
-		  if (car(e) != sc->if_keyword)
-		    set_cdr(e, cons(sc, vars, cdr(e)));     /* export it */
-		  else add_symbol_to_list(sc, symbol_to_keyword(sc, vars));
-		}
-	      /* else e = cons(sc, vars, e); */ /* ?? should this be set-cdr etc? */
-	      return(OPT_F);
-	    }
-	  body_export_ok = false;
-	}
+        {
+          if ((export_ok) &&
+              (is_symbol(vars)))
+            {
+              /* actually if this is defining a function, the name should probably be included in the local let
+               *   but that's next-to-impossible to guarantee unless it's (define x (lambda...)) of course.
+               */
+              sc->temp9 = e;
+              for (s7_pointer p = body; is_pair(p); p = cdr(p))
+                if ((is_pair(car(p))) &&
+                    (!is_checked(car(p))) && /* ((full_type(p) & (TYPE_MASK | T_CHECKED)) == T_PAIR) is not faster */
+                    (optimize_expression(sc, car(p), hop, e, false) == OPT_OOPS)) /* "body" here is not body in terms of export_ok */
+                  {
+                    sc->temp9 = sc->unused;
+                    return(OPT_OOPS);
+                  }
+              sc->temp9 = sc->unused;
+
+              add_symbol_to_list(sc, vars);
+              if (is_pair(e))
+                {
+                  if (car(e) != sc->if_keyword)
+                    set_cdr(e, cons(sc, vars, cdr(e)));     /* export it */
+                  else add_symbol_to_list(sc, symbol_to_keyword(sc, vars));
+                }
+              /* else e = cons(sc, vars, e); */ /* ?? should this be set-cdr etc? */
+              return(OPT_F);
+            }
+          body_export_ok = false;
+        }
       break;
 
     case OP_LAMBDA: case OP_LAMBDA_STAR:
     case OP_MACRO:  case OP_MACRO_STAR:
       vars = cadr(expr);
       if (is_null(vars))
-	e = cons(sc, sc->nil, e);
+        e = cons(sc, sc->nil, e);
       else
-	if ((!is_pair(vars)) && (!is_symbol(vars)))
-	  return(OPT_OOPS);
+        if ((!is_pair(vars)) && (!is_symbol(vars)))
+          return(OPT_OOPS);
       e = collect_parameters(sc, vars, e);
       body = cddr(expr);
       break;
 
     case OP_SET:
       if ((is_pair(cadr(expr))) && (caadr(expr) == sc->outlet_symbol))
-	return(OPT_OOPS);
+        return(OPT_OOPS);
       if (!is_pair(cddr(expr)))
-	return(OPT_OOPS);
+        return(OPT_OOPS);
       if ((is_pair(cadr(expr))) &&
-	  (!is_checked(cadr(expr))))
-	{
-	  bool old_in_with_let = sc->in_with_let;
-	  set_checked(cadr(expr));
-	  if (caadr(expr) == sc->with_let_symbol) sc->in_with_let = true;
-	  for (s7_pointer lp = cdadr(expr); is_pair(lp); lp = cdr(lp))
-	    if ((is_pair(car(lp))) &&
-		(!is_checked(car(lp))) &&
-		(optimize_expression(sc, car(lp), hop, e, body_export_ok) == OPT_OOPS))
-	      {
-		sc->in_with_let = old_in_with_let;
-		return(OPT_OOPS);
-	      }
-	  sc->in_with_let = old_in_with_let;
-	}
+          (!is_checked(cadr(expr))))
+        {
+          bool old_in_with_let = sc->in_with_let;
+          set_checked(cadr(expr));
+          if (caadr(expr) == sc->with_let_symbol) sc->in_with_let = true;
+          for (s7_pointer lp = cdadr(expr); is_pair(lp); lp = cdr(lp))
+            if ((is_pair(car(lp))) &&
+                (!is_checked(car(lp))) &&
+                (optimize_expression(sc, car(lp), hop, e, body_export_ok) == OPT_OOPS))
+              {
+                sc->in_with_let = old_in_with_let;
+                return(OPT_OOPS);
+              }
+          sc->in_with_let = old_in_with_let;
+        }
       if ((is_pair(caddr(expr))) &&
-	  (!is_checked(caddr(expr))) &&
-	  (optimize_expression(sc, caddr(expr), hop, e, body_export_ok) == OPT_OOPS))
-	return(OPT_OOPS);
+          (!is_checked(caddr(expr))) &&
+          (optimize_expression(sc, caddr(expr), hop, e, body_export_ok) == OPT_OOPS))
+        return(OPT_OOPS);
 
       if ((is_pair(cadr(expr))) && (caadr(expr) == sc->s7_starlet_symbol))
-	return(OPT_T);
+        return(OPT_T);
       return(OPT_F);
 
     case OP_WITH_LET:
@@ -73338,81 +73338,81 @@ static opt_t optimize_syntax(s7_scheme *sc, s7_pointer expr, s7_pointer func, in
        * returns 1 if hop is 1, but -2 otherwise.  (with-let (unlet)...) is safe however.
        */
       {
-	bool old_with_let = sc->in_with_let;
-	sc->in_with_let = (old_with_let) || (!is_pair(body)) || (!is_pair(car(body))) ||
-	                  ((caar(body) != sc->unlet_symbol) && /* (caar(body) != sc->rootlet_symbol) && */ (caar(body) != sc->curlet_symbol));
-	/* not rootlet here: (let ((i 0)) (_rd3_ (with-let (rootlet) ((null? i) i)))) */
-	for (s7_pointer p = body; is_pair(p); p = cdr(p))
-	  if ((is_pair(car(p))) &&
-	      (!is_checked(car(p))) &&
-	      (optimize_expression(sc, car(p), 0, sc->nil, body_export_ok) == OPT_OOPS))
-	    {
-	      sc->in_with_let = old_with_let;
-	      return(OPT_OOPS);
-	    }
-	sc->in_with_let = old_with_let;
-	return(OPT_F);
+        bool old_with_let = sc->in_with_let;
+        sc->in_with_let = (old_with_let) || (!is_pair(body)) || (!is_pair(car(body))) ||
+                          ((caar(body) != sc->unlet_symbol) && /* (caar(body) != sc->rootlet_symbol) && */ (caar(body) != sc->curlet_symbol));
+        /* not rootlet here: (let ((i 0)) (_rd3_ (with-let (rootlet) ((null? i) i)))) */
+        for (s7_pointer p = body; is_pair(p); p = cdr(p))
+          if ((is_pair(car(p))) &&
+              (!is_checked(car(p))) &&
+              (optimize_expression(sc, car(p), 0, sc->nil, body_export_ok) == OPT_OOPS))
+            {
+              sc->in_with_let = old_with_let;
+              return(OPT_OOPS);
+            }
+        sc->in_with_let = old_with_let;
+        return(OPT_F);
       }
 
     case OP_CASE:
       if ((is_pair(cadr(expr))) &&
-	  (!is_checked(cadr(expr))) &&
-	  (optimize_expression(sc, cadr(expr), hop, e, false) == OPT_OOPS))
-	return(OPT_OOPS);
+          (!is_checked(cadr(expr))) &&
+          (optimize_expression(sc, cadr(expr), hop, e, false) == OPT_OOPS))
+        return(OPT_OOPS);
       for (s7_pointer p = cddr(expr); is_pair(p); p = cdr(p))
-	if ((is_pair(car(p))) &&
-	    (is_pair(cdar(p))))
-	  for (s7_pointer rst = cdar(p); is_pair(rst); rst = cdr(rst))
-	    if ((is_pair(car(rst))) &&
-		(!is_checked(car(rst))) &&
-		(optimize_expression(sc, car(rst), hop, e, false) == OPT_OOPS))
-	      return(OPT_OOPS);
+        if ((is_pair(car(p))) &&
+            (is_pair(cdar(p))))
+          for (s7_pointer rst = cdar(p); is_pair(rst); rst = cdr(rst))
+            if ((is_pair(car(rst))) &&
+                (!is_checked(car(rst))) &&
+                (optimize_expression(sc, car(rst), hop, e, false) == OPT_OOPS))
+              return(OPT_OOPS);
       return(OPT_F);
 
     case OP_COND: /* split opt is necessary: (cond (lambda (x) ...)) */
       for (s7_pointer p = cdr(expr); is_pair(p); p = cdr(p))
-	if (is_pair(car(p)))
-	  {
-	    s7_pointer test = caar(p);
-	    e = cons(sc, sc->if_keyword, e);  /* I think this is a marker in case define is encountered? (see above) */
-	    if ((is_pair(test)) &&
-		(!is_checked(test)) &&
-		(optimize_expression(sc, test, hop, e, false) == OPT_OOPS))
-	      return(OPT_OOPS);
-	    for (s7_pointer rst = cdar(p); is_pair(rst); rst = cdr(rst))
-	      if ((is_pair(car(rst))) &&
-		  (!is_checked(car(rst))) &&
-		  (optimize_expression(sc, car(rst), hop, e, false) == OPT_OOPS))
-		return(OPT_OOPS);
-	  }
+        if (is_pair(car(p)))
+          {
+            s7_pointer test = caar(p);
+            e = cons(sc, sc->if_keyword, e);  /* I think this is a marker in case define is encountered? (see above) */
+            if ((is_pair(test)) &&
+                (!is_checked(test)) &&
+                (optimize_expression(sc, test, hop, e, false) == OPT_OOPS))
+              return(OPT_OOPS);
+            for (s7_pointer rst = cdar(p); is_pair(rst); rst = cdr(rst))
+              if ((is_pair(car(rst))) &&
+                  (!is_checked(car(rst))) &&
+                  (optimize_expression(sc, car(rst), hop, e, false) == OPT_OOPS))
+                return(OPT_OOPS);
+          }
       {
-	s7_pointer p;
-	for (p = cdr(expr); is_pair(p); p = cdr(p))
-	  {
-	    s7_pointer q;
-	    if ((!is_pair(car(p))) || (!is_fxable(sc, caar(p))))
-	      break;
-	    if (!is_pair(cdar(p)))
-	      break;
-	    for (q = cdar(p); is_pair(q); q = cdr(q))
-	      if ((car(q) == sc->feed_to_symbol) || (!is_fxable(sc, car(q))))
-		break;
-	    if (!is_null(q)) break;
-	  }
-	if (!is_null(p)) return(OPT_F);
-	set_safe_optimize_op(expr, OP_COND_NA_NA);
+        s7_pointer p;
+        for (p = cdr(expr); is_pair(p); p = cdr(p))
+          {
+            s7_pointer q;
+            if ((!is_pair(car(p))) || (!is_fxable(sc, caar(p))))
+              break;
+            if (!is_pair(cdar(p)))
+              break;
+            for (q = cdar(p); is_pair(q); q = cdr(q))
+              if ((car(q) == sc->feed_to_symbol) || (!is_fxable(sc, car(q))))
+                break;
+            if (!is_null(q)) break;
+          }
+        if (!is_null(p)) return(OPT_F);
+        set_safe_optimize_op(expr, OP_COND_NA_NA);
       }
       for (s7_pointer p = cdr(expr); is_pair(p); p = cdr(p))
-	{
-	  set_fx_direct(car(p), fx_choose(sc, car(p), e, pair_symbol_is_safe));
-	  for (s7_pointer q = cdar(p); is_pair(q); q = cdr(q))
-	    set_fx_direct(q, fx_choose(sc, q, e, pair_symbol_is_safe));
-	}
+        {
+          set_fx_direct(car(p), fx_choose(sc, car(p), e, pair_symbol_is_safe));
+          for (s7_pointer q = cdar(p); is_pair(q); q = cdr(q))
+            set_fx_direct(q, fx_choose(sc, q, e, pair_symbol_is_safe));
+        }
       return(OPT_T);
 
     case OP_IF: case OP_WHEN: case OP_UNLESS:
       if ((!is_pair(cdr(expr))) || (!is_pair(cddr(expr))))
-	return(OPT_OOPS);
+        return(OPT_OOPS);
     case OP_OR: case OP_AND:
       e = cons(sc, sc->if_keyword, e);
       break;
@@ -73423,11 +73423,11 @@ static opt_t optimize_syntax(s7_scheme *sc, s7_pointer expr, s7_pointer func, in
   sc->temp9 = e;
   for (s7_pointer p = body; is_pair(p); p = cdr(p))
     if ((is_pair(car(p))) &&
-	(!is_checked(car(p))) && /* ((full_type(p) & (TYPE_MASK | T_CHECKED)) == T_PAIR) is not faster */
-	(optimize_expression(sc, car(p), hop, e, body_export_ok) == OPT_OOPS))
+        (!is_checked(car(p))) && /* ((full_type(p) & (TYPE_MASK | T_CHECKED)) == T_PAIR) is not faster */
+        (optimize_expression(sc, car(p), hop, e, body_export_ok) == OPT_OOPS))
       {
-	sc->temp9 = sc->unused;
-	return(OPT_OOPS);
+        sc->temp9 = sc->unused;
+        return(OPT_OOPS);
       }
   sc->temp9 = sc->unused;
 
@@ -73436,148 +73436,148 @@ static opt_t optimize_syntax(s7_scheme *sc, s7_pointer expr, s7_pointer func, in
        (symbol_id(car(expr)) == 0)))
     {
       if (op == OP_IF)
-	{
-	  s7_pointer test = cdr(expr), b1, b2, p;
-	  for (p = cdr(expr); is_pair(p); p = cdr(p))
-	    if (!is_fxable(sc, car(p)))
-	      return(OPT_F);
-	  if (!is_null(p)) return(OPT_OOPS);
-	  if ((is_pair(cdr(test))) && (is_pair(cddr(test))) && (!is_null(cdddr(test))))
-	    return(OPT_OOPS);
-
-	  for (p = cdr(expr); is_pair(p); p = cdr(p))
-	    set_fx_direct(p, fx_choose(sc, p, e, pair_symbol_is_safe));
-
-	  b1 = cdr(test);
-	  b2 = cdr(b1);
-	  if ((fx_proc(b1) == fx_q) &&
-	      (is_pair(b2)))
-	    {
-	      set_opt3_con(test, cadar(b1));
-	      if (fx_proc(b2) == fx_q)
-		{
-		  set_safe_optimize_op(expr, OP_IF_A_C_C);
-		  set_opt1_con(expr, cadar(b1));
-		  set_opt2_con(expr, cadar(b2));
-		  return(OPT_T);
-		}
-	      set_opt1_pair(expr, b1);
-	      set_opt2_pair(expr, b2);
-	      set_safe_optimize_op(expr, OP_IF_A_A_A);
-	    }
-	  else
-	    {
-	      if ((is_pair(car(test))) &&
-		  (caar(test) == sc->not_symbol) &&
-		  (is_fxable(sc, cadar(test))))
-		{
-		  set_fx_direct(cdar(test), fx_choose(sc, cdar(test), e, pair_symbol_is_safe));
-		  set_opt1_pair(expr, cdar(test));
-		  set_opt2_pair(expr, b1);
-		  if (is_pair(b2)) set_opt3_pair(expr, b2);
-		  set_safe_optimize_op(expr, (is_null(b2)) ? OP_IF_NOT_A_A : OP_IF_NOT_A_A_A);
-		}
-	      else
-		{
-		  if ((is_pair(b2)) && (fx_proc(b1) == fx_c) && (fx_proc(b2) == fx_c))
-		    {
-		      set_safe_optimize_op(expr, OP_IF_A_C_C);
-		      set_opt1_con(expr, car(b1));
-		      set_opt2_con(expr, car(b2));
-		      return(OPT_T);
-		    }
-		  if ((fx_proc(test) == fx_and_2a) && (fx_proc(b1) == fx_s))
-		    {
-		      set_opt1_pair(expr, cdadr(expr));
-		      set_opt2_pair(expr, cddadr(expr));
-		      set_opt3_sym(expr, car(b1));
-		      set_safe_optimize_op(expr, OP_IF_AND2_S_A);
-		      return(OPT_T);
-		    }
-		  set_opt1_pair(expr, b1);
-		  if (is_pair(b2)) set_opt2_pair(expr, b2);
-		  set_safe_optimize_op(expr, (is_null(b2)) ? OP_IF_A_A : ((fx_proc(test) == fx_s) ? OP_IF_S_A_A : OP_IF_A_A_A));
-		}}
-	  return(OPT_T);
-	}
+        {
+          s7_pointer test = cdr(expr), b1, b2, p;
+          for (p = cdr(expr); is_pair(p); p = cdr(p))
+            if (!is_fxable(sc, car(p)))
+              return(OPT_F);
+          if (!is_null(p)) return(OPT_OOPS);
+          if ((is_pair(cdr(test))) && (is_pair(cddr(test))) && (!is_null(cdddr(test))))
+            return(OPT_OOPS);
+
+          for (p = cdr(expr); is_pair(p); p = cdr(p))
+            set_fx_direct(p, fx_choose(sc, p, e, pair_symbol_is_safe));
+
+          b1 = cdr(test);
+          b2 = cdr(b1);
+          if ((fx_proc(b1) == fx_q) &&
+              (is_pair(b2)))
+            {
+              set_opt3_con(test, cadar(b1));
+              if (fx_proc(b2) == fx_q)
+                {
+                  set_safe_optimize_op(expr, OP_IF_A_C_C);
+                  set_opt1_con(expr, cadar(b1));
+                  set_opt2_con(expr, cadar(b2));
+                  return(OPT_T);
+                }
+              set_opt1_pair(expr, b1);
+              set_opt2_pair(expr, b2);
+              set_safe_optimize_op(expr, OP_IF_A_A_A);
+            }
+          else
+            {
+              if ((is_pair(car(test))) &&
+                  (caar(test) == sc->not_symbol) &&
+                  (is_fxable(sc, cadar(test))))
+                {
+                  set_fx_direct(cdar(test), fx_choose(sc, cdar(test), e, pair_symbol_is_safe));
+                  set_opt1_pair(expr, cdar(test));
+                  set_opt2_pair(expr, b1);
+                  if (is_pair(b2)) set_opt3_pair(expr, b2);
+                  set_safe_optimize_op(expr, (is_null(b2)) ? OP_IF_NOT_A_A : OP_IF_NOT_A_A_A);
+                }
+              else
+                {
+                  if ((is_pair(b2)) && (fx_proc(b1) == fx_c) && (fx_proc(b2) == fx_c))
+                    {
+                      set_safe_optimize_op(expr, OP_IF_A_C_C);
+                      set_opt1_con(expr, car(b1));
+                      set_opt2_con(expr, car(b2));
+                      return(OPT_T);
+                    }
+                  if ((fx_proc(test) == fx_and_2a) && (fx_proc(b1) == fx_s))
+                    {
+                      set_opt1_pair(expr, cdadr(expr));
+                      set_opt2_pair(expr, cddadr(expr));
+                      set_opt3_sym(expr, car(b1));
+                      set_safe_optimize_op(expr, OP_IF_AND2_S_A);
+                      return(OPT_T);
+                    }
+                  set_opt1_pair(expr, b1);
+                  if (is_pair(b2)) set_opt2_pair(expr, b2);
+                  set_safe_optimize_op(expr, (is_null(b2)) ? OP_IF_A_A : ((fx_proc(test) == fx_s) ? OP_IF_S_A_A : OP_IF_A_A_A));
+                }}
+          return(OPT_T);
+        }
       else
-	{
-	  if ((op == OP_OR) || (op == OP_AND))
-	    {
-	      int32_t args, pairs = 0;
-	      s7_pointer p, sym = NULL;
-	      bool c_s_is_ok = true;
-
-	      for (p = cdr(expr); is_pair(p); p = cdr(p))
-		if (!is_fxable(sc, car(p)))
-		  return(OPT_F);
-	      if (!is_null(p)) return(OPT_OOPS);
-	      for (args = 0, p = cdr(expr); is_pair(p); p = cdr(p), args++) /* this only applies to or/and */
-		if (is_pair(car(p)))
-		  {
-		    pairs++;
-		    if ((c_s_is_ok) &&
-			((!is_h_safe_c_s(car(p))) ||
-			 ((sym) && (sym != cadar(p)))))
-		      c_s_is_ok = false;
-		    else sym = (is_pair(cdar(p))) ? cadar(p) : sc->unspecified;
-		  }
-
-	      if ((c_s_is_ok) && (args == 2) && (pairs == 2))
-		{
-		  if (op == OP_OR)
-		    {
-		      set_opt3_sym(cdr(expr), cadadr(expr));
-		      if ((is_symbol(caadr(expr))) && (symbol_type(caadr(expr)) > 0) && (is_global(caadr(expr))) &&
-			  ((is_symbol(caaddr(expr))) && (symbol_type(caaddr(expr)) > 0) && (is_global(caaddr(expr)))))
-			{
-			  set_opt3_int(expr, symbol_type(caadr(expr)));
-			  set_opt2_int(cdr(expr), symbol_type(caaddr(expr)));
-			  set_safe_optimize_op(expr, OP_OR_S_TYPE_2);
-			}
-		      else set_safe_optimize_op(expr, OP_OR_S_2);
-		    }
-		  else
-		    {
-		      set_opt3_sym(cdr(expr), cadadr(expr));
-		      set_safe_optimize_op(expr, OP_AND_S_2);
-		    }
-		  return(OPT_T);
-		}
-
-	      for (p = cdr(expr); is_pair(p); p = cdr(p))
-		set_fx_direct(p, fx_choose(sc, p, e, pair_symbol_is_safe));
-	      if (op == OP_OR)
-		{
-		  if (args == 2)
-		    set_safe_optimize_op(expr, OP_OR_2A);
-		  else
-		    {
-		      if (args == 3)
-			set_safe_optimize_op(expr, OP_OR_3A);
-		      else set_safe_optimize_op(expr, OP_OR_N);
-		    }
-		  return(OPT_T);
-		}
-	      if (args == 2)
-		set_safe_optimize_op(expr, OP_AND_2A);
-	      else set_safe_optimize_op(expr, (args == 3) ? OP_AND_3A : OP_AND_N);
-	      return(OPT_T);
-	    }
-	  else
-	    if (op == OP_BEGIN)
-	      {
-		s7_pointer p;
-		if (!is_pair(cdr(expr))) return(OPT_F);
-		for (p = cdr(expr); is_pair(p); p = cdr(p))
-		  if (!is_fxable(sc, car(p)))
-		    return(OPT_F);
-		if (!is_null(p)) return(OPT_OOPS);
-		for (p = cdr(expr); is_pair(p); p = cdr(p))
-		  set_fx_direct(p, fx_choose(sc, p, e, pair_symbol_is_safe));
-		set_safe_optimize_op(expr, ((is_pair(cddr(expr))) && (is_null(cdddr(expr)))) ? OP_BEGIN_AA : OP_BEGIN_NA);
-		return(OPT_T);
-	      }}}   /* fully fxable lets don't happen much: even let-2a-a is scarcely used */
+        {
+          if ((op == OP_OR) || (op == OP_AND))
+            {
+              int32_t args, pairs = 0;
+              s7_pointer p, sym = NULL;
+              bool c_s_is_ok = true;
+
+              for (p = cdr(expr); is_pair(p); p = cdr(p))
+                if (!is_fxable(sc, car(p)))
+                  return(OPT_F);
+              if (!is_null(p)) return(OPT_OOPS);
+              for (args = 0, p = cdr(expr); is_pair(p); p = cdr(p), args++) /* this only applies to or/and */
+                if (is_pair(car(p)))
+                  {
+                    pairs++;
+                    if ((c_s_is_ok) &&
+                        ((!is_h_safe_c_s(car(p))) ||
+                         ((sym) && (sym != cadar(p)))))
+                      c_s_is_ok = false;
+                    else sym = (is_pair(cdar(p))) ? cadar(p) : sc->unspecified;
+                  }
+
+              if ((c_s_is_ok) && (args == 2) && (pairs == 2))
+                {
+                  if (op == OP_OR)
+                    {
+                      set_opt3_sym(cdr(expr), cadadr(expr));
+                      if ((is_symbol(caadr(expr))) && (symbol_type(caadr(expr)) > 0) && (is_global(caadr(expr))) &&
+                          ((is_symbol(caaddr(expr))) && (symbol_type(caaddr(expr)) > 0) && (is_global(caaddr(expr)))))
+                        {
+                          set_opt3_int(expr, symbol_type(caadr(expr)));
+                          set_opt2_int(cdr(expr), symbol_type(caaddr(expr)));
+                          set_safe_optimize_op(expr, OP_OR_S_TYPE_2);
+                        }
+                      else set_safe_optimize_op(expr, OP_OR_S_2);
+                    }
+                  else
+                    {
+                      set_opt3_sym(cdr(expr), cadadr(expr));
+                      set_safe_optimize_op(expr, OP_AND_S_2);
+                    }
+                  return(OPT_T);
+                }
+
+              for (p = cdr(expr); is_pair(p); p = cdr(p))
+                set_fx_direct(p, fx_choose(sc, p, e, pair_symbol_is_safe));
+              if (op == OP_OR)
+                {
+                  if (args == 2)
+                    set_safe_optimize_op(expr, OP_OR_2A);
+                  else
+                    {
+                      if (args == 3)
+                        set_safe_optimize_op(expr, OP_OR_3A);
+                      else set_safe_optimize_op(expr, OP_OR_N);
+                    }
+                  return(OPT_T);
+                }
+              if (args == 2)
+                set_safe_optimize_op(expr, OP_AND_2A);
+              else set_safe_optimize_op(expr, (args == 3) ? OP_AND_3A : OP_AND_N);
+              return(OPT_T);
+            }
+          else
+            if (op == OP_BEGIN)
+              {
+                s7_pointer p;
+                if (!is_pair(cdr(expr))) return(OPT_F);
+                for (p = cdr(expr); is_pair(p); p = cdr(p))
+                  if (!is_fxable(sc, car(p)))
+                    return(OPT_F);
+                if (!is_null(p)) return(OPT_OOPS);
+                for (p = cdr(expr); is_pair(p); p = cdr(p))
+                  set_fx_direct(p, fx_choose(sc, p, e, pair_symbol_is_safe));
+                set_safe_optimize_op(expr, ((is_pair(cddr(expr))) && (is_null(cdddr(expr)))) ? OP_BEGIN_AA : OP_BEGIN_NA);
+                return(OPT_T);
+              }}}   /* fully fxable lets don't happen much: even let-2a-a is scarcely used */
   return(OPT_F);
 }
 
@@ -73590,45 +73590,45 @@ static opt_t optimize_funcs(s7_scheme *sc, s7_pointer expr, s7_pointer func, int
     {
       s7_pointer car_p = car(p);
       if (is_normal_symbol(car_p)) /* for opt func */
-	symbols++;
+        symbols++;
       else
-	if (is_pair(car_p))
-	  {
-	    pairs++;
-	    if (!is_checked(car_p))
-	      {
-		opt_t res;
-		if ((is_pair(car(car_p))) && (caar(car_p) == sc->let_symbol))
-		  res = OPT_F;
-		else res = optimize_expression(sc, car_p, orig_hop, e, false);
-		if (res == OPT_F)
-		  {
-		    bad_pairs++;
-		    if (is_proper_quote(sc, car_p))
-		      quotes++;
-		  }
-		else
-		  if (res == OPT_OOPS)
-		    return(OPT_OOPS);
-	      }
-	    else
-	      if ((!is_optimized(car_p)) ||
-		  (is_unsafe(car_p)))
-		{
-		  bad_pairs++;
-		  if (is_proper_quote(sc, car_p))
-		    quotes++;
-		}}}
+        if (is_pair(car_p))
+          {
+            pairs++;
+            if (!is_checked(car_p))
+              {
+                opt_t res;
+                if ((is_pair(car(car_p))) && (caar(car_p) == sc->let_symbol))
+                  res = OPT_F;
+                else res = optimize_expression(sc, car_p, orig_hop, e, false);
+                if (res == OPT_F)
+                  {
+                    bad_pairs++;
+                    if (is_proper_quote(sc, car_p))
+                      quotes++;
+                  }
+                else
+                  if (res == OPT_OOPS)
+                    return(OPT_OOPS);
+              }
+            else
+              if ((!is_optimized(car_p)) ||
+                  (is_unsafe(car_p)))
+                {
+                  bad_pairs++;
+                  if (is_proper_quote(sc, car_p))
+                    quotes++;
+                }}}
   if (is_null(p))            /* if not null, dotted list of args, (cons 1 . 2) etc -- error perhaps? */
     {
       switch (args)
-	{
-	case 0:  return(optimize_thunk(sc, expr, func, hop, e));
-	case 1:  return(optimize_func_one_arg(sc, expr, func, hop, pairs, symbols, quotes, bad_pairs, e));
-	case 2:  return(optimize_func_two_args(sc, expr, func, hop, pairs, symbols, quotes, bad_pairs, e));
-	case 3:  return(optimize_func_three_args(sc, expr, func, hop, pairs, symbols, quotes, bad_pairs, e));
-	default: return(optimize_func_many_args(sc, expr, func, hop, args, pairs, symbols, quotes, bad_pairs, e));
-	}}
+        {
+        case 0:  return(optimize_thunk(sc, expr, func, hop, e));
+        case 1:  return(optimize_func_one_arg(sc, expr, func, hop, pairs, symbols, quotes, bad_pairs, e));
+        case 2:  return(optimize_func_two_args(sc, expr, func, hop, pairs, symbols, quotes, bad_pairs, e));
+        case 3:  return(optimize_func_three_args(sc, expr, func, hop, pairs, symbols, quotes, bad_pairs, e));
+        default: return(optimize_func_many_args(sc, expr, func, hop, args, pairs, symbols, quotes, bad_pairs, e));
+        }}
   return(OPT_OOPS); /* was OPT_F, but this is always an error */
 }
 
@@ -73642,165 +73642,165 @@ static opt_t optimize_expression(s7_scheme *sc, s7_pointer expr, int32_t hop, s7
     {
       s7_pointer slot;
       if (is_syntactic_symbol(car_expr))
-	{
-	  if (!is_pair(cdr(expr)))
-	    return(OPT_OOPS);
-	  return(optimize_syntax(sc, expr, T_Syn(global_value(car_expr)), hop, e, export_ok));
-	}
+        {
+          if (!is_pair(cdr(expr)))
+            return(OPT_OOPS);
+          return(optimize_syntax(sc, expr, T_Syn(global_value(car_expr)), hop, e, export_ok));
+        }
       slot = find_uncomplicated_symbol(sc, car_expr, e); /* local vars (recursive calls too??) are considered complicated */
       if (is_slot(slot))
-	{
-	  s7_pointer func = slot_value(slot);
-	  if (is_syntax(func))                           /* not is_syntactic -- here we have the value */
-	    return((is_pair(cdr(expr))) ? optimize_syntax(sc, expr, func, hop, e, export_ok) : OPT_OOPS);  /* e can be extended via set-cdr! here */
-
-	  if (is_any_macro(func))
-	    return(OPT_F);
-
-	  /* we miss implicit indexing here because at this time, the data are not set */
-	  if ((is_t_procedure(func)) ||                  /* t_procedure_p: c_funcs, closures, etc */
-	      ((is_applicable(func)) &&
-	       (is_safe_procedure(func))))               /* built-in applicable objects like vectors */
-	    {
-	      if ((hop != 0) &&
-		  ((is_any_closure(func)) ||             /* see use-redef in s7test -- I'm not sure about this */
-		   ((!is_global(car_expr)) &&
-		    ((!is_slot(global_slot(car_expr))) ||
-		     (global_value(car_expr) != func)))) &&
-		  (!is_immutable(car_expr)) && /* list|apply-values -- can't depend on opt1 here because it might not be global, or might be redefined locally */
-		  (!is_immutable_slot(slot)))       /* (define-constant...) */
-		{
-		  /* (let () (define (f2 a) (+ a 1)) (define (f1 a) (f2 a)) (define (f2 a) (- a)) (f1 12))
-		   * (let () (define (f2 a) (+ a 1)) (define (f1 a) (f2 a)) (define (f2 a) (- a 1)) (f1 12))
-		   * and similar define* cases
-		   */
-		  hop = 0;
-		  /* this is very tricky!  See s7test for some cases.  Basically, we need to protect a recursive call
-		   *   of the current function being optimized from being confused with some previous definition
-		   *   of the same name.  But method lists have global names so the global bit is off even though the
-		   *   thing is actually a safe global.  But no closure can be considered safe in the hop sense --
-		   *   even a global function might be redefined at any time, and previous uses of it in other functions
-		   *   need to reflect its new value.
-		   *   So, closures are always checked, but built-in functions are used as if never redefined until that redefinition.
-		   * Syntax handling is already impure in s7, so the special handling of built-in functions doesn't
-		   *   offend me much.  Consider each a sort of reader macro until someone redefines it -- previous
-		   *   uses might not be affected because they might have been optimized away -- the result depends on the
-		   *   current optimizer.
-		   * Another case (from K Matheussen):
-		   *   (define (call-func func arg1 arg2) (define (call) (func arg1 arg2)) (call)) (call-func + 1 2.5) (call-func - 5 2)
-		   *   when we get here originally "func" is +, hop=1, but just checking for !is_global(car_expr) is
-		   *   not good enough -- if we load mockery.scm, nothing is global!
-		   * Yet another case (define (test-abs) (define (abs x) (+ x 1)) (format *stderr* "abs ~A~%" (abs -1)))
-		   *   when optimize_syntax sees the (define abs ...), it inserts abs into e so that the caller's e is extended (set-cdr!)
-		   *   so that find_uncomplicated_symbol above will be unhappy when we reach (abs -1) as the format arg.
-		   *   This can be confused if lambda is redefined at some point, but...
-		   */
-		}
-	      return(optimize_funcs(sc, expr, func, hop, orig_hop, e));
-	    }}
+        {
+          s7_pointer func = slot_value(slot);
+          if (is_syntax(func))                           /* not is_syntactic -- here we have the value */
+            return((is_pair(cdr(expr))) ? optimize_syntax(sc, expr, func, hop, e, export_ok) : OPT_OOPS);  /* e can be extended via set-cdr! here */
+
+          if (is_any_macro(func))
+            return(OPT_F);
+
+          /* we miss implicit indexing here because at this time, the data are not set */
+          if ((is_t_procedure(func)) ||                  /* t_procedure_p: c_funcs, closures, etc */
+              ((is_applicable(func)) &&
+               (is_safe_procedure(func))))               /* built-in applicable objects like vectors */
+            {
+              if ((hop != 0) &&
+                  ((is_any_closure(func)) ||             /* see use-redef in s7test -- I'm not sure about this */
+                   ((!is_global(car_expr)) &&
+                    ((!is_slot(global_slot(car_expr))) ||
+                     (global_value(car_expr) != func)))) &&
+                  (!is_immutable(car_expr)) && /* list|apply-values -- can't depend on opt1 here because it might not be global, or might be redefined locally */
+                  (!is_immutable_slot(slot)))       /* (define-constant...) */
+                {
+                  /* (let () (define (f2 a) (+ a 1)) (define (f1 a) (f2 a)) (define (f2 a) (- a)) (f1 12))
+                   * (let () (define (f2 a) (+ a 1)) (define (f1 a) (f2 a)) (define (f2 a) (- a 1)) (f1 12))
+                   * and similar define* cases
+                   */
+                  hop = 0;
+                  /* this is very tricky!  See s7test for some cases.  Basically, we need to protect a recursive call
+                   *   of the current function being optimized from being confused with some previous definition
+                   *   of the same name.  But method lists have global names so the global bit is off even though the
+                   *   thing is actually a safe global.  But no closure can be considered safe in the hop sense --
+                   *   even a global function might be redefined at any time, and previous uses of it in other functions
+                   *   need to reflect its new value.
+                   *   So, closures are always checked, but built-in functions are used as if never redefined until that redefinition.
+                   * Syntax handling is already impure in s7, so the special handling of built-in functions doesn't
+                   *   offend me much.  Consider each a sort of reader macro until someone redefines it -- previous
+                   *   uses might not be affected because they might have been optimized away -- the result depends on the
+                   *   current optimizer.
+                   * Another case (from K Matheussen):
+                   *   (define (call-func func arg1 arg2) (define (call) (func arg1 arg2)) (call)) (call-func + 1 2.5) (call-func - 5 2)
+                   *   when we get here originally "func" is +, hop=1, but just checking for !is_global(car_expr) is
+                   *   not good enough -- if we load mockery.scm, nothing is global!
+                   * Yet another case (define (test-abs) (define (abs x) (+ x 1)) (format *stderr* "abs ~A~%" (abs -1)))
+                   *   when optimize_syntax sees the (define abs ...), it inserts abs into e so that the caller's e is extended (set-cdr!)
+                   *   so that find_uncomplicated_symbol above will be unhappy when we reach (abs -1) as the format arg.
+                   *   This can be confused if lambda is redefined at some point, but...
+                   */
+                }
+              return(optimize_funcs(sc, expr, func, hop, orig_hop, e));
+            }}
       else
-	if ((sc->undefined_identifier_warnings) &&
-	    (slot == sc->undefined) &&           /* car_expr is not in e or global */
-	    (symbol_tag(car_expr) == 0))         /*    and we haven't looked it up earlier */
-	  {
-	    s7_pointer p = current_input_port(sc);
-	    if ((is_input_port(p)) &&
-		(port_file(p) != stdin) &&
-		(!port_is_closed(p)) &&
-		(port_filename(p)))
-	      s7_warn(sc, 1024, "%s might be undefined (%s %u)\n", display(car_expr), port_filename(p), port_line_number(p));
-	    else s7_warn(sc, 1024, "; %s might be undefined\n", display(car_expr));
-	    symbol_set_tag(car_expr, 1);        /* one warning is enough */
-	  }
+        if ((sc->undefined_identifier_warnings) &&
+            (slot == sc->undefined) &&           /* car_expr is not in e or global */
+            (symbol_tag(car_expr) == 0))         /*    and we haven't looked it up earlier */
+          {
+            s7_pointer p = current_input_port(sc);
+            if ((is_input_port(p)) &&
+                (port_file(p) != stdin) &&
+                (!port_is_closed(p)) &&
+                (port_filename(p)))
+              s7_warn(sc, 1024, "%s might be undefined (%s %u)\n", display(car_expr), port_filename(p), port_line_number(p));
+            else s7_warn(sc, 1024, "; %s might be undefined\n", display(car_expr));
+            symbol_set_tag(car_expr, 1);        /* one warning is enough */
+          }
 
       /* car_expr is a symbol but it's not a built-in procedure or a safe case = vector etc */
       {
-	/* else maybe it's something like a let variable binding: (sqrtfreq (sqrt frequency)) */
-	s7_pointer p;
-	int32_t len = 0, pairs = 0, symbols = 0;
-
-	for (p = cdr(expr); is_pair(p); p = cdr(p), len++)
-	  {
-	    s7_pointer car_p = car(p);
-	    if (is_pair(car_p))
-	      {
-		pairs++;
-		if ((!is_checked(car_p)) &&
-		    (optimize_expression(sc, car_p, hop, e, false) == OPT_OOPS))
-		  return(OPT_OOPS);
-	      }
-	    else
-	      if (is_symbol(car_p))
-		symbols++;
-	  }
-	if ((is_null(p)) &&              /* (+ 1 . 2) */
-	    (!is_optimized(expr)))
-	  {
-	    /* len=0 case is almost entirely arglists */
-	    set_opt1_con(expr, sc->unused);
-
-	    if (pairs == 0)
-	      {
-		if (len == 0)
-		  {
-		    /* hoping to catch object application here, as in readers in Snd */
-		    set_unsafe_optimize_op(expr, OP_UNKNOWN);
-		    return(OPT_F);
-		  }
-		if (len == 1)
-		  {
-		    if (!is_quote(car_expr)) /* !! quote can be redefined locally, unsetting the T_SYNTACTIC flag -- can this happen elsewhere? */
-		      set_unsafe_optimize_op(expr, (is_normal_symbol(cadr(expr))) ? OP_UNKNOWN_S : OP_UNKNOWN_A);
-		    fx_annotate_arg(sc, cdr(expr), e); /* g->a later if closure */
-		    return(OPT_F);
-		  }
-		if (len == 2)
-		  {
-		    set_unsafely_optimized(expr);
-		    set_optimize_op(expr, OP_UNKNOWN_GG);
-		    return(OPT_F);
-		  }
-		if (len >= 3)
-		  {
-		    if (len == symbols)
-		      {
-			set_unsafe_optimize_op(expr, OP_UNKNOWN_NS);
-			set_opt3_arglen(cdr(expr), len);
-			return(OPT_F);
-		      }
-		    if (fx_count(sc, expr) == len)
-		      {
-			set_unsafe_optimize_op(expr, OP_UNKNOWN_NA);
-			set_opt3_arglen(cdr(expr), len);
-			return(OPT_F);
-		      }}}
-	    else /* pairs != 0 */
-	      {
-		s7_pointer arg1 = cadr(expr);
-		if ((pairs == 1) && (len == 1))
-		  {
-		    if ((is_quote(car_expr)) &&
-			(direct_memq(sc->quote_symbol, e)))
-		      return(OPT_OOPS);
-
-		    if (is_fxable(sc, arg1))
-		      {
-			set_opt3_arglen(cdr(expr), 1);
-			fx_annotate_arg(sc, cdr(expr), e);
-			set_unsafe_optimize_op(expr, OP_UNKNOWN_A);
-			return(OPT_F);
-		      }}
-		if (fx_count(sc, expr) == len)
-		  {
-		    set_unsafe_optimize_op(expr, (len == 1) ? OP_UNKNOWN_A : ((len == 2) ? OP_UNKNOWN_AA : OP_UNKNOWN_NA));
-		    set_opt3_arglen(cdr(expr), len);
-		    if (len <= 2) fx_annotate_args(sc, cdr(expr), e);
-		    return(OPT_F);
-		  }
-		set_unsafe_optimize_op(expr, OP_UNKNOWN_NP);
-		set_opt3_arglen(cdr(expr), len);
-		return(OPT_F);
-	      }}}}
+        /* else maybe it's something like a let variable binding: (sqrtfreq (sqrt frequency)) */
+        s7_pointer p;
+        int32_t len = 0, pairs = 0, symbols = 0;
+
+        for (p = cdr(expr); is_pair(p); p = cdr(p), len++)
+          {
+            s7_pointer car_p = car(p);
+            if (is_pair(car_p))
+              {
+                pairs++;
+                if ((!is_checked(car_p)) &&
+                    (optimize_expression(sc, car_p, hop, e, false) == OPT_OOPS))
+                  return(OPT_OOPS);
+              }
+            else
+              if (is_symbol(car_p))
+                symbols++;
+          }
+        if ((is_null(p)) &&              /* (+ 1 . 2) */
+            (!is_optimized(expr)))
+          {
+            /* len=0 case is almost entirely arglists */
+            set_opt1_con(expr, sc->unused);
+
+            if (pairs == 0)
+              {
+                if (len == 0)
+                  {
+                    /* hoping to catch object application here, as in readers in Snd */
+                    set_unsafe_optimize_op(expr, OP_UNKNOWN);
+                    return(OPT_F);
+                  }
+                if (len == 1)
+                  {
+                    if (!is_quote(car_expr)) /* !! quote can be redefined locally, unsetting the T_SYNTACTIC flag -- can this happen elsewhere? */
+                      set_unsafe_optimize_op(expr, (is_normal_symbol(cadr(expr))) ? OP_UNKNOWN_S : OP_UNKNOWN_A);
+                    fx_annotate_arg(sc, cdr(expr), e); /* g->a later if closure */
+                    return(OPT_F);
+                  }
+                if (len == 2)
+                  {
+                    set_unsafely_optimized(expr);
+                    set_optimize_op(expr, OP_UNKNOWN_GG);
+                    return(OPT_F);
+                  }
+                if (len >= 3)
+                  {
+                    if (len == symbols)
+                      {
+                        set_unsafe_optimize_op(expr, OP_UNKNOWN_NS);
+                        set_opt3_arglen(cdr(expr), len);
+                        return(OPT_F);
+                      }
+                    if (fx_count(sc, expr) == len)
+                      {
+                        set_unsafe_optimize_op(expr, OP_UNKNOWN_NA);
+                        set_opt3_arglen(cdr(expr), len);
+                        return(OPT_F);
+                      }}}
+            else /* pairs != 0 */
+              {
+                s7_pointer arg1 = cadr(expr);
+                if ((pairs == 1) && (len == 1))
+                  {
+                    if ((is_quote(car_expr)) &&
+                        (direct_memq(sc->quote_symbol, e)))
+                      return(OPT_OOPS);
+
+                    if (is_fxable(sc, arg1))
+                      {
+                        set_opt3_arglen(cdr(expr), 1);
+                        fx_annotate_arg(sc, cdr(expr), e);
+                        set_unsafe_optimize_op(expr, OP_UNKNOWN_A);
+                        return(OPT_F);
+                      }}
+                if (fx_count(sc, expr) == len)
+                  {
+                    set_unsafe_optimize_op(expr, (len == 1) ? OP_UNKNOWN_A : ((len == 2) ? OP_UNKNOWN_AA : OP_UNKNOWN_NA));
+                    set_opt3_arglen(cdr(expr), len);
+                    if (len <= 2) fx_annotate_args(sc, cdr(expr), e);
+                    return(OPT_F);
+                  }
+                set_unsafe_optimize_op(expr, OP_UNKNOWN_NP);
+                set_opt3_arglen(cdr(expr), len);
+                return(OPT_F);
+              }}}}
   else
     {
       /* car(expr) is not a symbol, but there might be interesting stuff here */
@@ -73808,26 +73808,26 @@ static opt_t optimize_expression(s7_scheme *sc, s7_pointer expr, int32_t hop, s7
       s7_pointer p;
 
       if ((car_expr == sc->quote_function) && (is_pair(cdr(expr)))) /* very common */
-	return(optimize_syntax(sc, expr, sc->quote_function, hop, e, export_ok));
+        return(optimize_syntax(sc, expr, sc->quote_function, hop, e, export_ok));
 
       if (is_c_function(car_expr)) /* (#_abs x) etc */
-	return(optimize_funcs(sc, expr, car_expr, 1, orig_hop, e));
+        return(optimize_funcs(sc, expr, car_expr, 1, orig_hop, e));
 
       if (is_syntax(car_expr)) /* (#_cond...) etc */
-	{
-	  if (!is_pair(cdr(expr)))
-	    return(OPT_OOPS);
-	  return(optimize_syntax(sc, expr, car_expr, orig_hop, e, export_ok));
-	}
+        {
+          if (!is_pair(cdr(expr)))
+            return(OPT_OOPS);
+          return(optimize_syntax(sc, expr, car_expr, orig_hop, e, export_ok));
+        }
       if (is_any_macro(car_expr))
-	return(OPT_F);
+        return(OPT_F);
 
       /* if car is a pair, we can't easily tell whether its value is (say) + or cond, so we need to catch this case and fixup fx settings */
       for (p = expr; is_pair(p); p = cdr(p))
-	if (((is_symbol(car(p))) && (is_syntactic_symbol(car(p)))) ||
-	    ((is_pair(car(p))) && (!is_checked(car(p))) &&
-	     (optimize_expression(sc, car(p), hop, e, false) == OPT_OOPS)))
-	  return(OPT_OOPS);
+        if (((is_symbol(car(p))) && (is_syntactic_symbol(car(p)))) ||
+            ((is_pair(car(p))) && (!is_checked(car(p))) &&
+             (optimize_expression(sc, car(p), hop, e, false) == OPT_OOPS)))
+          return(OPT_OOPS);
       /* here we get for example:
        *  ((if (not (let? p)) write write-to-vector) obj p) ; not uncomplicated/c-function [((if 3d fourth third) p) in index]
        *  ((if (symbol? (cadr f)) cadr (if (pair? (cadr f)) caadr not)) f) ; fx not symbol -- opif_a_aaq_a
@@ -73845,20 +73845,20 @@ static opt_t optimize(s7_scheme *sc, s7_pointer code, int32_t hop, s7_pointer e)
       s7_pointer obj = car(x);
       set_checked(x);
       if (is_pair(obj))
-	{
-	  if ((!is_checked(obj)) &&
-	      (optimize_expression(sc, obj, hop, e, true) == OPT_OOPS))
-	    {
-	      s7_pointer p;
-	      for (p = cdr(x); is_pair(p); p = cdr(p));
-	      if (!is_null(p))
-		syntax_error_nr(sc, "stray dot in function body: ~S", 30, code);
-	      return(OPT_OOPS);
-	    }}
+        {
+          if ((!is_checked(obj)) &&
+              (optimize_expression(sc, obj, hop, e, true) == OPT_OOPS))
+            {
+              s7_pointer p;
+              for (p = cdr(x); is_pair(p); p = cdr(p));
+              if (!is_null(p))
+                syntax_error_nr(sc, "stray dot in function body: ~S", 30, code);
+              return(OPT_OOPS);
+            }}
       else /* new 22-Sep-19, but I don't think this saves anything over falling into trailers */
-	if (is_symbol(obj))
-	  set_optimize_op(obj, (is_keyword(obj)) ? OP_CONSTANT : OP_SYMBOL);
-	else set_optimize_op(obj, OP_CONSTANT);
+        if (is_symbol(obj))
+          set_optimize_op(obj, (is_keyword(obj)) ? OP_CONSTANT : OP_SYMBOL);
+        else set_optimize_op(obj, OP_CONSTANT);
     }
   if (!is_list(x))
     syntax_error_nr(sc, "stray dot in function body: ~S", 30, code);
@@ -73871,7 +73871,7 @@ static bool symbol_is_in_arg_list(const s7_pointer sym, s7_pointer lst)
   s7_pointer x;
   for (x = lst; is_pair(x); x = cdr(x))
     if ((sym == car(x)) ||
-	((is_pair(car(x))) && (sym == caar(x))))
+        ((is_pair(car(x))) && (sym == caar(x))))
       return(true);
   return(sym == x);
 }
@@ -73884,8 +73884,8 @@ static void check_lambda_args(s7_scheme *sc, s7_pointer args, int32_t *arity, s7
   if (!is_list(args))
     {
       if (is_constant(sc, args))                       /* (lambda :a ...) or (define (f :a) ...) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "lambda parameter is a constant: (~S ~S ...)", 43), car(form), cadr(form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "lambda parameter is a constant: (~S ~S ...)", 43), car(form), cadr(form)));
       /* we currently accept (lambda i i . i) (lambda quote i)  (lambda : : . #()) (lambda : 1 . "")
        *   at this level, but when the lambda form is evaluated, it will trigger an error.
        */
@@ -73897,33 +73897,33 @@ static void check_lambda_args(s7_scheme *sc, s7_pointer args, int32_t *arity, s7
     {
       s7_pointer car_x = car(x);
       if (is_constant(sc, car_x))                      /* (lambda (pi) pi), constant here means not a symbol */
-	{
-	  if (is_pair(car_x))                          /* (lambda ((:hi . "hi") . "hi") 1) */
-	    error_nr(sc, sc->syntax_error_symbol,      /* don't use ~A here or below, (lambda #\null do) for example */
-		     set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is a pair (perhaps use lambda*?): (~S ~S ...)", 65),
-				 car_x, car(form), cadr(form)));
-	  if ((car_x == sc->rest_keyword) &&
-	      ((car(form) == sc->define_symbol) || (car(form) == sc->lambda_symbol)))
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_5(sc, wrap_string(sc, "lambda parameter is ~S? (~S ~S ...), perhaps use ~S", 51),
-				 car_x, car(form), cadr(form),
-				 (car(form) == sc->define_symbol) ? sc->define_star_symbol : sc->lambda_star_symbol));
-	  error_nr(sc, sc->syntax_error_symbol,        /* (lambda (a :b c) 1) */
-		   set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is a constant: (~S ~S ...)", 46),
-			       car_x, car(form), cadr(form)));
-	}
+        {
+          if (is_pair(car_x))                          /* (lambda ((:hi . "hi") . "hi") 1) */
+            error_nr(sc, sc->syntax_error_symbol,      /* don't use ~A here or below, (lambda #\null do) for example */
+                     set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is a pair (perhaps use lambda*?): (~S ~S ...)", 65),
+                                 car_x, car(form), cadr(form)));
+          if ((car_x == sc->rest_keyword) &&
+              ((car(form) == sc->define_symbol) || (car(form) == sc->lambda_symbol)))
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_5(sc, wrap_string(sc, "lambda parameter is ~S? (~S ~S ...), perhaps use ~S", 51),
+                                 car_x, car(form), cadr(form),
+                                 (car(form) == sc->define_symbol) ? sc->define_star_symbol : sc->lambda_star_symbol));
+          error_nr(sc, sc->syntax_error_symbol,        /* (lambda (a :b c) 1) */
+                   set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is a constant: (~S ~S ...)", 46),
+                               car_x, car(form), cadr(form)));
+        }
       if (symbol_is_in_arg_list(car_x, cdr(x)))       /* (lambda (a a) ...) or (lambda (a . a) ...) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is used twice in the parameter list, (~S ~S ...)", 68),
-			     car_x, car(form), cadr(form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is used twice in the parameter list, (~S ~S ...)", 68),
+                             car_x, car(form), cadr(form)));
       set_local(car_x);
     }
   if (is_not_null(x))
     {
       if (is_constant(sc, x))                         /* (lambda (a . 0.0) a) or (lambda (a . :b) a) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_4(sc, wrap_string(sc, "lambda :rest parameter ~S is a constant in (~S ~S ...)", 54),
-			     x, car(form), cadr(form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_4(sc, wrap_string(sc, "lambda :rest parameter ~S is a constant in (~S ~S ...)", 54),
+                             x, car(form), cadr(form)));
       i = -i - 1;
     }
   if (arity) (*arity) = i;
@@ -73937,8 +73937,8 @@ static s7_pointer check_lambda_star_args(s7_scheme *sc, s7_pointer args, s7_poin
   if (!is_list(args))
     {
       if (is_constant(sc, args))                                /* (lambda* :a ...) or (define* (f . :a) ...) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "lambda* parameter is a constant: (~S ~S ...)", 44), car(form), cadr(form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "lambda* parameter is a constant: (~S ~S ...)", 44), car(form), cadr(form)));
       if (is_symbol(args)) set_local(args);
       return(args);
     }
@@ -73949,96 +73949,96 @@ static s7_pointer check_lambda_star_args(s7_scheme *sc, s7_pointer args, s7_poin
     {
       s7_pointer car_w = car(w);
       if (is_pair(car_w))
-	{
-	  has_defaults = true;
-	  if (is_constant(sc, car(car_w)))                      /* (lambda* ((:a 1)) ...) */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is a constant: (~S ~S ...)", 47),
-				 car(car_w), car(form), cadr(form)));
-	  if (symbol_is_in_arg_list(caar(w), cdr(w)))           /* (lambda* ((a 1) a) ...) */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S occurs twice in the argument list: (~S ~S ...)", 67),
-				 car(car_w), car(form), cadr(form)));
-	  if (!is_pair(cdr(car_w)))
-	    {
-	      if (is_null(cdr(car_w)))                          /* (lambda* ((a)) ...) */
-		error_nr(sc, sc->syntax_error_symbol,
-			 set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S default value missing in (~S ~S ...)", 57),
-				     car_w, car(form), cadr(form)));
-	      error_nr(sc, sc->syntax_error_symbol,             /* (lambda* ((a . 0.0)) a) */
-		       set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is a dotted pair in (~S ~S ...)", 52),
-				   car_w, car(form), cadr(form)));
-	    }
-	  if ((is_pair(cadr(car_w))) &&                         /* (lambda* ((a (quote . -1))) ...) */
-	      (s7_list_length(sc, cadr(car_w)) < 0))
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S default value is not a proper list in (~S ~S ...)", 70),
-				 car_w, car(form), cadr(form)));
-	  if (is_not_null(cddr(car_w)))                         /* (lambda* ((a 0.0 'hi)) a) */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S has multiple default values in (~S ~S ...)", 63),
-				 car_w, car(form), cadr(form)));
-
-	  set_local(car(car_w));
-	}
+        {
+          has_defaults = true;
+          if (is_constant(sc, car(car_w)))                      /* (lambda* ((:a 1)) ...) */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is a constant: (~S ~S ...)", 47),
+                                 car(car_w), car(form), cadr(form)));
+          if (symbol_is_in_arg_list(caar(w), cdr(w)))           /* (lambda* ((a 1) a) ...) */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S occurs twice in the argument list: (~S ~S ...)", 67),
+                                 car(car_w), car(form), cadr(form)));
+          if (!is_pair(cdr(car_w)))
+            {
+              if (is_null(cdr(car_w)))                          /* (lambda* ((a)) ...) */
+                error_nr(sc, sc->syntax_error_symbol,
+                         set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S default value missing in (~S ~S ...)", 57),
+                                     car_w, car(form), cadr(form)));
+              error_nr(sc, sc->syntax_error_symbol,             /* (lambda* ((a . 0.0)) a) */
+                       set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is a dotted pair in (~S ~S ...)", 52),
+                                   car_w, car(form), cadr(form)));
+            }
+          if ((is_pair(cadr(car_w))) &&                         /* (lambda* ((a (quote . -1))) ...) */
+              (s7_list_length(sc, cadr(car_w)) < 0))
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S default value is not a proper list in (~S ~S ...)", 70),
+                                 car_w, car(form), cadr(form)));
+          if (is_not_null(cddr(car_w)))                         /* (lambda* ((a 0.0 'hi)) a) */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S has multiple default values in (~S ~S ...)", 63),
+                                 car_w, car(form), cadr(form)));
+
+          set_local(car(car_w));
+        }
       else
-	if (car_w != sc->rest_keyword)
-	  {
-	    if (is_constant(sc, car_w))
-	      {
-		if (car_w != sc->allow_other_keys_keyword)
-		  error_nr(sc, sc->syntax_error_symbol,         /* (lambda* (pi) ...) */
-			   set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is a constant: (~S ~S ...)", 47),
-				       car_w, car(form), cadr(form)));
-		if (is_not_null(cdr(w)))                        /* (lambda* (:allow-other-keys x) x) */
-		  error_nr(sc, sc->syntax_error_symbol,
-			   set_elist_3(sc, wrap_string(sc, ":allow-other-keys should be the last parameter: (~S ~S ...)", 59),
-				       car(form), cadr(form)));
-		if (w == top)                                   /* (lambda* (:allow-other-keys) 1) */
-		  error_nr(sc, sc->syntax_error_symbol,
-			   set_elist_3(sc, wrap_string(sc, ":allow-other-keys can't be the only parameter: (~S ~S ...)", 58),
-				       car(form), cadr(form)));
-		set_allow_other_keys(top);
-		set_cdr(v, sc->nil);
-	      }
-	    if (symbol_is_in_arg_list(car_w, cdr(w)))           /* (lambda* (a a) ...) or (lambda* (a . a) ...) */
-	      error_nr(sc, sc->syntax_error_symbol,
-		       set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is used twice in the parameter list: (~S ~S ...)", 69),
-				   car_w, car(form), cadr(form)));
-
-	    if (!is_keyword(car_w)) set_local(car_w);
-	  }
-	else
-	  {
-	    has_defaults = true;
-	    if (!is_pair(cdr(w)))                               /* (lambda* (:rest) ...) */
-	      error_nr(sc, sc->syntax_error_symbol,
-		       set_elist_3(sc, wrap_string(sc, "lambda* :rest parameter missing in (~S ~S ...)", 46),
-				   car(form), cadr(form)));
-	    if (!is_symbol(cadr(w)))                            /* (lambda* (:rest (a 1)) ...) */
-	      {
-		if (!is_pair(cadr(w)))                          /* (lambda* (:rest 1) ...) */
-		  error_nr(sc, sc->syntax_error_symbol,
-			   set_elist_4(sc, wrap_string(sc, "lambda* :rest parameter is not a symbol: ~S in (~S ~S ...)", 58),
-				       w, car(form), cadr(form)));
-		error_nr(sc, sc->syntax_error_symbol,           /* (lambda* (:rest '(1 2)) 1) */
-			 set_elist_4(sc, wrap_string(sc, "lambda* :rest parameter can't have a default value: ~S in (~S ~S ...)", 69),
-				     w, car(form), cadr(form)));
-	      }
-	    if (is_constant(sc, cadr(w)))                       /* (lambda* (a :rest x) ...) where x is locally a constant */
-	      error_nr(sc, sc->wrong_type_arg_symbol,
-		       set_elist_4(sc, wrap_string(sc, "lambda*: ~S is immutable, so it can't be the :rest parameter name: (~S ~S ...)", 78),
-				   cadr(w), car(form), cadr(form)));
-	    set_local(cadr(w));
-	  }}
+        if (car_w != sc->rest_keyword)
+          {
+            if (is_constant(sc, car_w))
+              {
+                if (car_w != sc->allow_other_keys_keyword)
+                  error_nr(sc, sc->syntax_error_symbol,         /* (lambda* (pi) ...) */
+                           set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is a constant: (~S ~S ...)", 47),
+                                       car_w, car(form), cadr(form)));
+                if (is_not_null(cdr(w)))                        /* (lambda* (:allow-other-keys x) x) */
+                  error_nr(sc, sc->syntax_error_symbol,
+                           set_elist_3(sc, wrap_string(sc, ":allow-other-keys should be the last parameter: (~S ~S ...)", 59),
+                                       car(form), cadr(form)));
+                if (w == top)                                   /* (lambda* (:allow-other-keys) 1) */
+                  error_nr(sc, sc->syntax_error_symbol,
+                           set_elist_3(sc, wrap_string(sc, ":allow-other-keys can't be the only parameter: (~S ~S ...)", 58),
+                                       car(form), cadr(form)));
+                set_allow_other_keys(top);
+                set_cdr(v, sc->nil);
+              }
+            if (symbol_is_in_arg_list(car_w, cdr(w)))           /* (lambda* (a a) ...) or (lambda* (a . a) ...) */
+              error_nr(sc, sc->syntax_error_symbol,
+                       set_elist_4(sc, wrap_string(sc, "lambda* parameter ~S is used twice in the parameter list: (~S ~S ...)", 69),
+                                   car_w, car(form), cadr(form)));
+
+            if (!is_keyword(car_w)) set_local(car_w);
+          }
+        else
+          {
+            has_defaults = true;
+            if (!is_pair(cdr(w)))                               /* (lambda* (:rest) ...) */
+              error_nr(sc, sc->syntax_error_symbol,
+                       set_elist_3(sc, wrap_string(sc, "lambda* :rest parameter missing in (~S ~S ...)", 46),
+                                   car(form), cadr(form)));
+            if (!is_symbol(cadr(w)))                            /* (lambda* (:rest (a 1)) ...) */
+              {
+                if (!is_pair(cadr(w)))                          /* (lambda* (:rest 1) ...) */
+                  error_nr(sc, sc->syntax_error_symbol,
+                           set_elist_4(sc, wrap_string(sc, "lambda* :rest parameter is not a symbol: ~S in (~S ~S ...)", 58),
+                                       w, car(form), cadr(form)));
+                error_nr(sc, sc->syntax_error_symbol,           /* (lambda* (:rest '(1 2)) 1) */
+                         set_elist_4(sc, wrap_string(sc, "lambda* :rest parameter can't have a default value: ~S in (~S ~S ...)", 69),
+                                     w, car(form), cadr(form)));
+              }
+            if (is_constant(sc, cadr(w)))                       /* (lambda* (a :rest x) ...) where x is locally a constant */
+              error_nr(sc, sc->wrong_type_arg_symbol,
+                       set_elist_4(sc, wrap_string(sc, "lambda*: ~S is immutable, so it can't be the :rest parameter name: (~S ~S ...)", 78),
+                                   cadr(w), car(form), cadr(form)));
+            set_local(cadr(w));
+          }}
   if (is_not_null(w))
     {
       if (is_constant(sc, w))                                   /* (lambda* (a . 0.0) a) or (lambda* (a . :b) a) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_4(sc, wrap_string(sc, "lambda* :rest parameter ~S is a constant, (~S ~S ...)", 53),
-			     w, car(form), cadr(form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_4(sc, wrap_string(sc, "lambda* :rest parameter ~S is a constant, (~S ~S ...)", 53),
+                             w, car(form), cadr(form)));
       if (is_symbol(w))
-	set_local(w);
+        set_local(w);
     }
   else
     if ((body) && (!has_defaults) && (is_pair(args)))
@@ -74068,348 +74068,348 @@ static body_t form_is_safe(s7_scheme *sc, s7_pointer func, s7_pointer x, bool at
     {
       if (!is_pair(cdr(x))) return(UNSAFE_BODY);
       switch (symbol_syntax_op_checked(x))
-	/* symbol_syntax_op(expr) here gets tangled in fx_annotation order problems! -- fix this?!?
-	 *   it appears that safe bodies are marked unsafe because the opts are out-of-order?
-	 */
-	{
-	case OP_OR: case OP_AND: case OP_BEGIN:	case OP_WITH_BAFFLE:
-	  return(body_is_safe(sc, func, cdr(x), at_end));
-
-	case OP_MACROEXPAND:
-	  return(UNSAFE_BODY);
-
-	case OP_QUOTE: case OP_QUOTE_UNCHECKED:
-	  return(((!is_pair(cdr(x))) || (!is_null(cddr(x)))) ? UNSAFE_BODY : VERY_SAFE_BODY);  /* (quote . 1) or (quote 1 2) etc */
-
-	case OP_IF:
-	  if (!is_pair(cddr(x))) return(UNSAFE_BODY);
-	  if (is_pair(cadr(x)))
-	    {
-	      result = form_is_safe(sc, func, cadr(x), false);
-	      if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-	    }
-	  if (is_pair(caddr(x)))
-	    {
-	      result = min_body(result, form_is_safe(sc, func, caddr(x), at_end));
-	      if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-	    }
-	  if ((is_pair(cdddr(x))) &&
-	      (is_pair(cadddr(x))))
-	    return(min_body(result, form_is_safe(sc, func, cadddr(x), at_end)));
-	  return(result);
-
-	case OP_WHEN: case OP_UNLESS:
-	  if (!is_pair(cddr(x))) return(UNSAFE_BODY);
-	  if (is_pair(cadr(x)))
-	    {
-	      result = form_is_safe(sc, func, cadr(x), false);
-	      if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-	    }
-	  return(min_body(result, body_is_safe(sc, func, cddr(x), at_end)));
-
-	case OP_COND:
-	  {
-	    bool follow = false;
-	    s7_pointer p = cdr(x);
-	    for (s7_pointer sp = x; is_pair(p); p = cdr(p))
-	      {
-		s7_pointer ex = car(p);
-		if (!is_pair(ex)) return(UNSAFE_BODY);
-		if (is_pair(car(ex)))
-		  {
-		    result = min_body(result, form_is_safe(sc, func, car(ex), false));
-		    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-		  }
-		if (is_pair(cdr(ex)))
-		  {
-		    result = min_body(result, body_is_safe(sc, func, cdr(ex), at_end));
-		    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-		  }
-		if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
-		follow = (!follow);
-	      }
-	    return((is_null(p)) ? result : UNSAFE_BODY);
-	  }
-
-	case OP_CASE:
-	  {
-	    bool follow = false;
-	    s7_pointer sp, p;
-	    if (!is_pair(cddr(x))) return(UNSAFE_BODY);
-	    if (is_pair(cadr(x)))
-	      {
-		result = form_is_safe(sc, func, cadr(x), false);
-		if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-	      }
-	    sp = cdr(x);
-	    for (p = cdr(sp); is_pair(p); p = cdr(p))
-	      {
-		if (!is_pair(car(p))) return(UNSAFE_BODY);
-		if (is_pair(cdar(p)))
-		  {
-		    result = min_body(result, body_is_safe(sc, func, cdar(p), at_end)); /* null cdar(p) ok here */
-		    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-		  }
-		if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
-		follow = (!follow);
-	      }
-	    return(result);
-	  }
-
-	case OP_SET:
-	  /* if we set func, we have to abandon the tail call scan: (let () (define (hi a) (let ((v (vector 1 2 3))) (set! hi v) (hi a))) (hi 1)) */
-	  if (!is_pair(cddr(x))) return(UNSAFE_BODY);
-	  if (cadr(x) == func) return(UNSAFE_BODY);
-
-	  /* car(x) is set!, cadr(x) is settee or obj, caddr(x) is val */
-	  if (is_pair(caddr(x)))
-	    {
-	      result = form_is_safe(sc, func, caddr(x), false);
-	      if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-	    }
-	  return((is_pair(cadr(x))) ? min_body(result, form_is_safe(sc, func, cadr(x), false)) : result);
-	  /* not OP_DEFINE even in simple cases (safe_closure assumes constant funclet) */
-
-	case OP_WITH_LET:
-	  if (!is_pair(cddr(x))) return(UNSAFE_BODY);
-	  return((is_pair(cadr(x))) ? UNSAFE_BODY : min_body(body_is_safe(sc, sc->F, cddr(x), at_end), SAFE_BODY));
-	  /* shadowing can happen in with-let -- symbols are global so local_slots are shadowable */
-
-	case OP_LET_TEMPORARILY:
-	  if (!is_pair(cadr(x))) return(UNSAFE_BODY);
-	  for (s7_pointer p = cadr(x); is_pair(p); p = cdr(p))
-	    {
-	      if ((!is_pair(car(p))) ||
-		  (!is_pair(cdar(p))))
-		return(UNSAFE_BODY);
-	      if (is_pair(cadar(p)))
-		{
-		  result = min_body(result, form_is_safe(sc, sc->F, cadar(p), false));
-		  if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-		}}
-	  return(min_body(result, body_is_safe(sc, sc->F, cddr(x), at_end)));
-
-	  /* in the name binders, we first have to check that "func" actually is the same thing as the caller's func */
-	case OP_LET: case OP_LET_STAR: case OP_LETREC: case OP_LETREC_STAR:
-	  {
-	    bool follow = false;
-	    s7_pointer let_name, sp, vars = cadr(x), body = cddr(x);
-	    if (is_symbol(vars))
-	      {
-		if (!is_pair(body)) return(UNSAFE_BODY);        /* (let name . res) */
-		if (vars == func) return(UNSAFE_BODY);          /* named let shadows caller */
-		let_name = vars;
-		vars = caddr(x);
-		body = cdddr(x);
-		if (is_symbol(func))
-		  add_symbol_to_list(sc, func);
-	      }
-	    else let_name = func;
-
-	    for (sp = NULL; is_pair(vars); vars = cdr(vars))
-	      {
-		s7_pointer let_var = car(vars), var_name;
-
-		if ((!is_pair(let_var)) ||
-		    (!is_pair(cdr(let_var))))
-		  return(UNSAFE_BODY);
-		var_name = car(let_var);
-		if ((!is_symbol(var_name)) ||
-		    (var_name == let_name) || /* let var shadows caller */
-		    (var_name == func))
-		  return(UNSAFE_BODY);
-		add_symbol_to_list(sc, var_name);
-
-		if (is_pair(cadr(let_var)))
-		  {
-		    result = min_body(result, form_is_safe(sc, let_name, cadr(let_var), false));
-		    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-		  }
-		follow = (!follow);
-		if (follow)
-		  {
-		    if (!sp)
-		      sp = vars;
-		    else
-		      {
-			sp = cdr(sp);
-			if (vars == sp) return(UNSAFE_BODY);
-		      }}}
-	    return(min_body(result, body_is_safe(sc, let_name, body, (let_name != func) || at_end)));
-	  }
-
-	case OP_DO:	  /* (do (...) (...) ...) */
-	  if (!is_pair(cddr(x))) return(UNSAFE_BODY);
-	  if (is_pair(cadr(x)))
-	    {
-	      s7_pointer vars = cadr(x);
-	      s7_pointer sp = vars;
-	      for (bool follow = false; is_pair(vars); vars = cdr(vars))
-		{
-		  s7_pointer do_var = car(vars);
-		  if ((!is_pair(do_var)) ||
-		      (!is_pair(cdr(do_var))) ||   /* (do ((a . 1) (b . 2)) ...) */
-		      (car(do_var) == func) ||
-		      (!is_symbol(car(do_var))))
-		    return(UNSAFE_BODY);
-
-		  add_symbol_to_list(sc, car(do_var));
-
-		  if (is_pair(cadr(do_var)))
-		    result = min_body(result, form_is_safe(sc, func, cadr(do_var), false));
-		  if ((is_pair(cddr(do_var))) && (is_pair(caddr(do_var))))
-		    result = min_body(result, form_is_safe(sc, func, caddr(do_var), false));
-		  if (result == UNSAFE_BODY)
-		    return(UNSAFE_BODY);
-		  if (sp != vars)
-		    {
-		      if (follow) {sp = cdr(sp); if (vars == sp) return(UNSAFE_BODY);}
-		      follow = (!follow);
-		    }}}
-	  if (is_pair(caddr(x)))
-	    result = min_body(result, body_is_safe(sc, func, caddr(x), at_end));
-	  return(min_body(result, body_is_safe(sc, func, cdddr(x), false)));
-
-	  /* define and friends are not safe: (define (a) (define b 3)...) tries to put b in the current let,
-	   *   but in a safe func, that's a constant.  See s7test L 1865 for an example.
-	   */
-	default:
-	  /* OP_LAMBDA is major case here */
-	  /* try to catch weird cases like:
-	   * (let () (define (hi1 a) (define (hi1 b) (+ b 1)) (hi1 a)) (hi1 1))
-	   * (let () (define (hi1 a) (define (ho1 b) b) (define (hi1 b) (+ b 1)) (hi1 a)) (hi1 1))
-	   */
-	  return(UNSAFE_BODY);
-	}}
+        /* symbol_syntax_op(expr) here gets tangled in fx_annotation order problems! -- fix this?!?
+         *   it appears that safe bodies are marked unsafe because the opts are out-of-order?
+         */
+        {
+        case OP_OR: case OP_AND: case OP_BEGIN:        case OP_WITH_BAFFLE:
+          return(body_is_safe(sc, func, cdr(x), at_end));
+
+        case OP_MACROEXPAND:
+          return(UNSAFE_BODY);
+
+        case OP_QUOTE: case OP_QUOTE_UNCHECKED:
+          return(((!is_pair(cdr(x))) || (!is_null(cddr(x)))) ? UNSAFE_BODY : VERY_SAFE_BODY);  /* (quote . 1) or (quote 1 2) etc */
+
+        case OP_IF:
+          if (!is_pair(cddr(x))) return(UNSAFE_BODY);
+          if (is_pair(cadr(x)))
+            {
+              result = form_is_safe(sc, func, cadr(x), false);
+              if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+            }
+          if (is_pair(caddr(x)))
+            {
+              result = min_body(result, form_is_safe(sc, func, caddr(x), at_end));
+              if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+            }
+          if ((is_pair(cdddr(x))) &&
+              (is_pair(cadddr(x))))
+            return(min_body(result, form_is_safe(sc, func, cadddr(x), at_end)));
+          return(result);
+
+        case OP_WHEN: case OP_UNLESS:
+          if (!is_pair(cddr(x))) return(UNSAFE_BODY);
+          if (is_pair(cadr(x)))
+            {
+              result = form_is_safe(sc, func, cadr(x), false);
+              if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+            }
+          return(min_body(result, body_is_safe(sc, func, cddr(x), at_end)));
+
+        case OP_COND:
+          {
+            bool follow = false;
+            s7_pointer p = cdr(x);
+            for (s7_pointer sp = x; is_pair(p); p = cdr(p))
+              {
+                s7_pointer ex = car(p);
+                if (!is_pair(ex)) return(UNSAFE_BODY);
+                if (is_pair(car(ex)))
+                  {
+                    result = min_body(result, form_is_safe(sc, func, car(ex), false));
+                    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+                  }
+                if (is_pair(cdr(ex)))
+                  {
+                    result = min_body(result, body_is_safe(sc, func, cdr(ex), at_end));
+                    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+                  }
+                if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
+                follow = (!follow);
+              }
+            return((is_null(p)) ? result : UNSAFE_BODY);
+          }
+
+        case OP_CASE:
+          {
+            bool follow = false;
+            s7_pointer sp, p;
+            if (!is_pair(cddr(x))) return(UNSAFE_BODY);
+            if (is_pair(cadr(x)))
+              {
+                result = form_is_safe(sc, func, cadr(x), false);
+                if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+              }
+            sp = cdr(x);
+            for (p = cdr(sp); is_pair(p); p = cdr(p))
+              {
+                if (!is_pair(car(p))) return(UNSAFE_BODY);
+                if (is_pair(cdar(p)))
+                  {
+                    result = min_body(result, body_is_safe(sc, func, cdar(p), at_end)); /* null cdar(p) ok here */
+                    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+                  }
+                if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
+                follow = (!follow);
+              }
+            return(result);
+          }
+
+        case OP_SET:
+          /* if we set func, we have to abandon the tail call scan: (let () (define (hi a) (let ((v (vector 1 2 3))) (set! hi v) (hi a))) (hi 1)) */
+          if (!is_pair(cddr(x))) return(UNSAFE_BODY);
+          if (cadr(x) == func) return(UNSAFE_BODY);
+
+          /* car(x) is set!, cadr(x) is settee or obj, caddr(x) is val */
+          if (is_pair(caddr(x)))
+            {
+              result = form_is_safe(sc, func, caddr(x), false);
+              if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+            }
+          return((is_pair(cadr(x))) ? min_body(result, form_is_safe(sc, func, cadr(x), false)) : result);
+          /* not OP_DEFINE even in simple cases (safe_closure assumes constant funclet) */
+
+        case OP_WITH_LET:
+          if (!is_pair(cddr(x))) return(UNSAFE_BODY);
+          return((is_pair(cadr(x))) ? UNSAFE_BODY : min_body(body_is_safe(sc, sc->F, cddr(x), at_end), SAFE_BODY));
+          /* shadowing can happen in with-let -- symbols are global so local_slots are shadowable */
+
+        case OP_LET_TEMPORARILY:
+          if (!is_pair(cadr(x))) return(UNSAFE_BODY);
+          for (s7_pointer p = cadr(x); is_pair(p); p = cdr(p))
+            {
+              if ((!is_pair(car(p))) ||
+                  (!is_pair(cdar(p))))
+                return(UNSAFE_BODY);
+              if (is_pair(cadar(p)))
+                {
+                  result = min_body(result, form_is_safe(sc, sc->F, cadar(p), false));
+                  if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+                }}
+          return(min_body(result, body_is_safe(sc, sc->F, cddr(x), at_end)));
+
+          /* in the name binders, we first have to check that "func" actually is the same thing as the caller's func */
+        case OP_LET: case OP_LET_STAR: case OP_LETREC: case OP_LETREC_STAR:
+          {
+            bool follow = false;
+            s7_pointer let_name, sp, vars = cadr(x), body = cddr(x);
+            if (is_symbol(vars))
+              {
+                if (!is_pair(body)) return(UNSAFE_BODY);        /* (let name . res) */
+                if (vars == func) return(UNSAFE_BODY);          /* named let shadows caller */
+                let_name = vars;
+                vars = caddr(x);
+                body = cdddr(x);
+                if (is_symbol(func))
+                  add_symbol_to_list(sc, func);
+              }
+            else let_name = func;
+
+            for (sp = NULL; is_pair(vars); vars = cdr(vars))
+              {
+                s7_pointer let_var = car(vars), var_name;
+
+                if ((!is_pair(let_var)) ||
+                    (!is_pair(cdr(let_var))))
+                  return(UNSAFE_BODY);
+                var_name = car(let_var);
+                if ((!is_symbol(var_name)) ||
+                    (var_name == let_name) || /* let var shadows caller */
+                    (var_name == func))
+                  return(UNSAFE_BODY);
+                add_symbol_to_list(sc, var_name);
+
+                if (is_pair(cadr(let_var)))
+                  {
+                    result = min_body(result, form_is_safe(sc, let_name, cadr(let_var), false));
+                    if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+                  }
+                follow = (!follow);
+                if (follow)
+                  {
+                    if (!sp)
+                      sp = vars;
+                    else
+                      {
+                        sp = cdr(sp);
+                        if (vars == sp) return(UNSAFE_BODY);
+                      }}}
+            return(min_body(result, body_is_safe(sc, let_name, body, (let_name != func) || at_end)));
+          }
+
+        case OP_DO:          /* (do (...) (...) ...) */
+          if (!is_pair(cddr(x))) return(UNSAFE_BODY);
+          if (is_pair(cadr(x)))
+            {
+              s7_pointer vars = cadr(x);
+              s7_pointer sp = vars;
+              for (bool follow = false; is_pair(vars); vars = cdr(vars))
+                {
+                  s7_pointer do_var = car(vars);
+                  if ((!is_pair(do_var)) ||
+                      (!is_pair(cdr(do_var))) ||   /* (do ((a . 1) (b . 2)) ...) */
+                      (car(do_var) == func) ||
+                      (!is_symbol(car(do_var))))
+                    return(UNSAFE_BODY);
+
+                  add_symbol_to_list(sc, car(do_var));
+
+                  if (is_pair(cadr(do_var)))
+                    result = min_body(result, form_is_safe(sc, func, cadr(do_var), false));
+                  if ((is_pair(cddr(do_var))) && (is_pair(caddr(do_var))))
+                    result = min_body(result, form_is_safe(sc, func, caddr(do_var), false));
+                  if (result == UNSAFE_BODY)
+                    return(UNSAFE_BODY);
+                  if (sp != vars)
+                    {
+                      if (follow) {sp = cdr(sp); if (vars == sp) return(UNSAFE_BODY);}
+                      follow = (!follow);
+                    }}}
+          if (is_pair(caddr(x)))
+            result = min_body(result, body_is_safe(sc, func, caddr(x), at_end));
+          return(min_body(result, body_is_safe(sc, func, cdddr(x), false)));
+
+          /* define and friends are not safe: (define (a) (define b 3)...) tries to put b in the current let,
+           *   but in a safe func, that's a constant.  See s7test L 1865 for an example.
+           */
+        default:
+          /* OP_LAMBDA is major case here */
+          /* try to catch weird cases like:
+           * (let () (define (hi1 a) (define (hi1 b) (+ b 1)) (hi1 a)) (hi1 1))
+           * (let () (define (hi1 a) (define (ho1 b) b) (define (hi1 b) (+ b 1)) (hi1 a)) (hi1 1))
+           */
+          return(UNSAFE_BODY);
+        }}
   else /* car(x) is not syntactic */
     {
       if (expr == func) /* try to catch tail call, expr is car(x) */
-	{
-	  bool follow = false;
-	  s7_pointer sp = x, p;
-	  sc->got_rec = true; /* (walk (car tree)) lint and almost all others in s7test */
-	  set_rec_tc_args(sc, proper_list_length(cdr(x)));
-	  if (!at_end) {result = RECUR_BODY; sc->not_tc = true;}
-	  for (p = cdr(x); is_pair(p); p = cdr(p))
-	    {
-	      if (is_pair(car(p)))
-		{
-		  if (caar(p) == func)    /* func called as arg, so not tail call */
-		    {
-		      sc->not_tc = true;
-		      result = RECUR_BODY;
-		    }
-		  result = min_body(result, form_is_safe(sc, func, car(p), false));
-		  if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-		}
-	      else
-		if (car(p) == func) /* func itself as arg */
-		  return(UNSAFE_BODY);
-
-	      if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
-	      follow = (!follow);
-	    }
-	  if ((at_end) && (!sc->not_tc) && (is_null(p))) /* tail call, so safe */
-	    {
-	      sc->got_tc = true;
-	      set_rec_tc_args(sc, proper_list_length(cdr(x)));
-	      return(result);
-	    }
-	  if (result != UNSAFE_BODY) result = RECUR_BODY;
-	  return(result);
-	}
+        {
+          bool follow = false;
+          s7_pointer sp = x, p;
+          sc->got_rec = true; /* (walk (car tree)) lint and almost all others in s7test */
+          set_rec_tc_args(sc, proper_list_length(cdr(x)));
+          if (!at_end) {result = RECUR_BODY; sc->not_tc = true;}
+          for (p = cdr(x); is_pair(p); p = cdr(p))
+            {
+              if (is_pair(car(p)))
+                {
+                  if (caar(p) == func)    /* func called as arg, so not tail call */
+                    {
+                      sc->not_tc = true;
+                      result = RECUR_BODY;
+                    }
+                  result = min_body(result, form_is_safe(sc, func, car(p), false));
+                  if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+                }
+              else
+                if (car(p) == func) /* func itself as arg */
+                  return(UNSAFE_BODY);
+
+              if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
+              follow = (!follow);
+            }
+          if ((at_end) && (!sc->not_tc) && (is_null(p))) /* tail call, so safe */
+            {
+              sc->got_tc = true;
+              set_rec_tc_args(sc, proper_list_length(cdr(x)));
+              return(result);
+            }
+          if (result != UNSAFE_BODY) result = RECUR_BODY;
+          return(result);
+        }
 
       if (is_symbol(expr)) /* expr=car(x) */
-	{
-	  s7_pointer f, f_slot;
-	  bool c_safe;
-
-	  if (symbol_is_in_list(sc, expr)) return(UNSAFE_BODY);
-	  if ((is_slot(global_slot(expr))) && (is_syntax(global_value(expr))))
-	    return(UNSAFE_BODY); /* syntax hidden behind some other name */
-
-	  f_slot = s7_slot(sc, expr);
-	  if (!is_slot(f_slot)) return(UNSAFE_BODY);
-
-	  f = slot_value(f_slot);
-	  if (is_c_function(f))
-	    {
-	      if ((expr == sc->apply_symbol) && (is_pair(cdr(x))) && (is_symbol(cadr(x)))) /* (apply <safe_c_function> ...) */
-		{
-		  s7_pointer cadr_f = lookup_unexamined(sc, cadr(x)); /* "unexamined" to skip unbound_variable */
-		  c_safe = ((cadr_f) && /* (cadr_f != sc->undefined) && */
-			    ((is_safe_c_function(cadr_f)) ||
-			     ((is_closure(cadr_f)) && (is_very_safe_closure(cadr_f)))));
-		}
-	      else c_safe = (is_safe_or_scope_safe_procedure(f));
-	    }
-	  else c_safe = false;
-
-	  result = ((is_simple_sequence(f)) || /* was is_sequence? */
-		    ((is_closure(f)) && (is_very_safe_closure(f))) ||
-		    ((c_safe) && ((is_immutable_slot(f_slot)) || (is_global(expr))))) ? VERY_SAFE_BODY : SAFE_BODY;
-
-	  if ((c_safe) ||
-	      ((is_any_closure(f)) && (is_safe_closure(f))) ||
-	      (is_simple_sequence(f)))  /* was is_sequence? */
-	    {
-	      bool follow = false;
-	      s7_pointer sp = x, p = cdr(x);
-
-	      for (; is_pair(p); p = cdr(p))
-		{
-		  if (is_unquoted_pair(car(p)))
-		    {
-		      if (caar(p) == func)
-			{
-			  sc->got_rec = true; /* (+ 1 (recur (- x 1))) t123 (and others) */
-			  set_rec_tc_args(sc, proper_list_length(cdar(p)));
-			  return(RECUR_BODY);
-			}
-		      if ((is_c_function(f)) && (is_scope_safe(f)) &&
-			  (caar(p) == sc->lambda_symbol))
-			{
-			  s7_pointer largs, lbody, q;
-			  body_t lresult;
-
-			  if (!is_pair(cdar(p))) /* (lambda . /) */
-			    return(UNSAFE_BODY);
-			  largs = cadar(p);
-			  lbody = cddar(p);
-			  for (q = largs; is_pair(q); q = cdr(q))
-			    {
-			      if (!is_symbol(car(q)))
-				return(UNSAFE_BODY);
-			      add_symbol_to_list(sc, car(q));
-			    }
-			  lresult = body_is_safe(sc, func, lbody, false);
-			  result = min_body(result, lresult);
-			}
-		      else result = min_body(result, form_is_safe(sc, func, car(p), false));
-		      if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-		    }
-		  else
-		    if (car(p) == func)          /* the current function passed as an argument to something */
-		      return(UNSAFE_BODY);
-
-		  if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
-		  follow = (!follow);
-		}
-	      return((is_null(p)) ? result : UNSAFE_BODY);
-	    }
-	  if ((is_safe_quote(expr)) &&
-	      (is_proper_list_1(sc, cdr(x))))
-	    return(result);
-
-	  if (expr == sc->values_symbol)      /* (values) is safe, as is (values x) if x is: (values (define...)) */
-	    {
-	      if (is_null(cdr(x))) return(result);
-	      if ((is_pair(cdr(x))) && (is_null(cddr(x))))
-		return((is_pair(cadr(x))) ? min_body(result, form_is_safe(sc, func, cadr(x), false)) : result);
-	    }}
+        {
+          s7_pointer f, f_slot;
+          bool c_safe;
+
+          if (symbol_is_in_list(sc, expr)) return(UNSAFE_BODY);
+          if ((is_slot(global_slot(expr))) && (is_syntax(global_value(expr))))
+            return(UNSAFE_BODY); /* syntax hidden behind some other name */
+
+          f_slot = s7_slot(sc, expr);
+          if (!is_slot(f_slot)) return(UNSAFE_BODY);
+
+          f = slot_value(f_slot);
+          if (is_c_function(f))
+            {
+              if ((expr == sc->apply_symbol) && (is_pair(cdr(x))) && (is_symbol(cadr(x)))) /* (apply <safe_c_function> ...) */
+                {
+                  s7_pointer cadr_f = lookup_unexamined(sc, cadr(x)); /* "unexamined" to skip unbound_variable */
+                  c_safe = ((cadr_f) && /* (cadr_f != sc->undefined) && */
+                            ((is_safe_c_function(cadr_f)) ||
+                             ((is_closure(cadr_f)) && (is_very_safe_closure(cadr_f)))));
+                }
+              else c_safe = (is_safe_or_scope_safe_procedure(f));
+            }
+          else c_safe = false;
+
+          result = ((is_simple_sequence(f)) || /* was is_sequence? */
+                    ((is_closure(f)) && (is_very_safe_closure(f))) ||
+                    ((c_safe) && ((is_immutable_slot(f_slot)) || (is_global(expr))))) ? VERY_SAFE_BODY : SAFE_BODY;
+
+          if ((c_safe) ||
+              ((is_any_closure(f)) && (is_safe_closure(f))) ||
+              (is_simple_sequence(f)))  /* was is_sequence? */
+            {
+              bool follow = false;
+              s7_pointer sp = x, p = cdr(x);
+
+              for (; is_pair(p); p = cdr(p))
+                {
+                  if (is_unquoted_pair(car(p)))
+                    {
+                      if (caar(p) == func)
+                        {
+                          sc->got_rec = true; /* (+ 1 (recur (- x 1))) t123 (and others) */
+                          set_rec_tc_args(sc, proper_list_length(cdar(p)));
+                          return(RECUR_BODY);
+                        }
+                      if ((is_c_function(f)) && (is_scope_safe(f)) &&
+                          (caar(p) == sc->lambda_symbol))
+                        {
+                          s7_pointer largs, lbody, q;
+                          body_t lresult;
+
+                          if (!is_pair(cdar(p))) /* (lambda . /) */
+                            return(UNSAFE_BODY);
+                          largs = cadar(p);
+                          lbody = cddar(p);
+                          for (q = largs; is_pair(q); q = cdr(q))
+                            {
+                              if (!is_symbol(car(q)))
+                                return(UNSAFE_BODY);
+                              add_symbol_to_list(sc, car(q));
+                            }
+                          lresult = body_is_safe(sc, func, lbody, false);
+                          result = min_body(result, lresult);
+                        }
+                      else result = min_body(result, form_is_safe(sc, func, car(p), false));
+                      if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+                    }
+                  else
+                    if (car(p) == func)          /* the current function passed as an argument to something */
+                      return(UNSAFE_BODY);
+
+                  if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
+                  follow = (!follow);
+                }
+              return((is_null(p)) ? result : UNSAFE_BODY);
+            }
+          if ((is_safe_quote(expr)) &&
+              (is_proper_list_1(sc, cdr(x))))
+            return(result);
+
+          if (expr == sc->values_symbol)      /* (values) is safe, as is (values x) if x is: (values (define...)) */
+            {
+              if (is_null(cdr(x))) return(result);
+              if ((is_pair(cdr(x))) && (is_null(cddr(x))))
+                return((is_pair(cadr(x))) ? min_body(result, form_is_safe(sc, func, cadr(x), false)) : result);
+            }}
       else
-	if (expr == sc->quote_function)
-	  return(((!is_pair(cdr(x))) || (!is_null(cddr(x)))) ? UNSAFE_BODY : VERY_SAFE_BODY);  /* (#_quote . 1) or (#_quote 1 2) etc */
+        if (expr == sc->quote_function)
+          return(((!is_pair(cdr(x))) || (!is_null(cddr(x)))) ? UNSAFE_BODY : VERY_SAFE_BODY);  /* (#_quote . 1) or (#_quote 1 2) etc */
 
       return(UNSAFE_BODY); /* not recur_body here if at_end -- possible defines in body etc */
     }
@@ -74424,15 +74424,15 @@ static body_t body_is_safe(s7_scheme *sc, s7_pointer func, s7_pointer body, bool
   for (s7_pointer sp = body; is_pair(p); p = cdr(p))
     {
       if (is_pair(car(p)))
-	{
-	  result = min_body(result, form_is_safe(sc, func, car(p), (at_end) && (is_null(cdr(p)))));
-	  if (result == UNSAFE_BODY) return(UNSAFE_BODY);
-	}
+        {
+          result = min_body(result, form_is_safe(sc, func, car(p), (at_end) && (is_null(cdr(p)))));
+          if (result == UNSAFE_BODY) return(UNSAFE_BODY);
+        }
       if (p != body)
-	{
-	  if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
-	  follow = (!follow);
-	}}
+        {
+          if (follow) {sp = cdr(sp); if (p == sp) return(UNSAFE_BODY);}
+          follow = (!follow);
+        }}
   return((is_null(p)) ? result : UNSAFE_BODY);
 }
 
@@ -74442,7 +74442,7 @@ static bool tree_has_definers_or_binders(s7_scheme *sc, s7_pointer tree)
     if (tree_has_definers_or_binders(sc, car(p)))
       return(true);
   return((is_symbol(tree)) &&
-	 (is_definer_or_binder(tree)));
+         (is_definer_or_binder(tree)));
 }
 
 static bool check_recur_if(s7_scheme *sc, const s7_pointer name, int32_t vars, s7_pointer args, s7_pointer body)
@@ -74455,228 +74455,228 @@ static bool check_recur_if(s7_scheme *sc, const s7_pointer name, int32_t vars, s
       s7_pointer false_p = cadr(obody);      /* if_a_a_(if...) */
 
       if ((vars <= 2) &&
-	  (is_fxable(sc, true_p)) &&
-	  (is_proper_list_4(sc, false_p)))
-	{
-	  if (car(false_p) == sc->if_symbol)
-	    {
-	      s7_pointer test2 = cadr(false_p);
-	      s7_pointer true2 = caddr(false_p);
-	      s7_pointer false2 = cadddr(false_p);
-	      if ((is_fxable(sc, test2)) &&
-		  (is_proper_list_3(sc, false2)) &&  /* opa_laaq or oplaa_laaq */
-		  (is_h_optimized(false2)))          /* the c-op */
-		{
-		  s7_pointer la1 = cadr(false2);
-		  s7_pointer la2 = caddr(false2);
-		  if ((is_fxable(sc, true2)) &&
-		      (((vars == 1) && (is_proper_list_2(sc, la1)) && (is_proper_list_2(sc, la2))) ||
-		       (((vars == 2) && (is_proper_list_3(sc, la1)) && (is_proper_list_3(sc, la2))))) &&
-		      (car(la1) == name) &&  	     (car(la2) == name) &&
-		      (is_fxable(sc, cadr(la1))) &&  (is_fxable(sc, cadr(la2))) &&
-		      ((vars == 1) || ((is_fxable(sc, caddr(la1))) && (is_fxable(sc, caddr(la2))))))
-		    {
-		      set_safe_optimize_op(body, (vars == 1) ? OP_RECUR_IF_A_A_IF_A_A_opLA_LAq : OP_RECUR_IF_A_A_IF_A_A_opLAA_LAAq);
-		      fx_annotate_arg(sc, cdr(body), args);
-		      fx_annotate_arg(sc, obody, args);
-		      fx_annotate_args(sc, cdr(false_p), args);
-		      fx_annotate_args(sc, cdr(la1), args);
-		      fx_annotate_args(sc, cdr(la2), args);
-		      fx_tree(sc, cdr(body), car(args), (vars == 2) ? cadr(args) : NULL, NULL, false);
-		      set_opt1_pair(body, cdr(false_p));
-		      set_opt3_pair(body, false2);
-		      set_opt3_pair(false2, cdr(la2));
-		      return(true);
-		    }
-		  if ((vars == 2) && (is_proper_list_3(sc, true2)) &&
-		      (car(true2) == name) &&
-		      (is_fxable(sc, cadr(true2))) && (is_fxable(sc, caddr(true2))) &&
-		      (is_fxable(sc, cadr(false2))) &&
-		      (is_proper_list_3(sc, la2)) &&
-		      (car(la2) == name) &&          /* actually, not needed because func is TC (not RECUR) if not == name */
-		      (is_fxable(sc, cadr(la2))) &&
-		      (is_fxable(sc, caddr(la2))))
-		    {
-		      set_safe_optimize_op(body, OP_RECUR_IF_A_A_IF_A_LAA_opA_LAAq);
-		      fx_annotate_arg(sc, cdr(body), args);       /* if_(A)... */
-		      fx_annotate_arg(sc, obody, args);           /* if_a_(A)... */
-		      fx_annotate_arg(sc, cdr(false_p), args);    /* if_a_a_if_(A)... */
-		      fx_annotate_args(sc, cdr(true2), args);     /* if_a_a_if_a_l(AA)... */
-		      fx_annotate_arg(sc, cdr(false2), args);     /* if_a_a_if_a_laa_op(A).. */
-		      fx_annotate_args(sc, cdr(la2), args);       /* if_a_a_if_a_laa_opa_l(AA)q */
-		      fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
-		      set_opt3_pair(body, false2);
-		      set_opt3_pair(false2, la2);
-		      return(true);
-		    }}}
-
-	  if (car(false_p) == sc->and_symbol)
-	    {
-	      s7_pointer a1 = cadr(false_p);
-	      s7_pointer a2 = caddr(false_p);
-	      s7_pointer a3 = cadddr(false_p);
-	      if ((is_fxable(sc, a1)) &&
-		  (is_proper_list_3(sc, a2)) && (is_proper_list_3(sc, a3)) &&
-		  (car(a2) == name) && (car(a3) == name) &&
-		  (is_fxable(sc, cadr(a2))) && (is_fxable(sc, cadr(a3))) &&
-		  (is_fxable(sc, caddr(a2))) && (is_fxable(sc, caddr(a3))))
-		{
-		  set_safe_optimize_op(body, OP_RECUR_IF_A_A_AND_A_LAA_LAA);
-		  fx_annotate_arg(sc, cdr(body), args);       /* if_(A)... */
-		  fx_annotate_arg(sc, cddr(body), args);      /* if_a_(A)... */
-		  fx_annotate_arg(sc, cdr(false_p), args);    /* if_a_a_and_(A)... */
-		  fx_annotate_args(sc, cdr(a2), args);        /* if_a_a_and_a_l(AA)... */
-		  fx_annotate_args(sc, cdr(a3), args);        /* if_a_a_and_a_laa_l(AA) */
-		  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
-		  set_opt3_pair(body, false_p);
-		  return(true);
-		}}}
+          (is_fxable(sc, true_p)) &&
+          (is_proper_list_4(sc, false_p)))
+        {
+          if (car(false_p) == sc->if_symbol)
+            {
+              s7_pointer test2 = cadr(false_p);
+              s7_pointer true2 = caddr(false_p);
+              s7_pointer false2 = cadddr(false_p);
+              if ((is_fxable(sc, test2)) &&
+                  (is_proper_list_3(sc, false2)) &&  /* opa_laaq or oplaa_laaq */
+                  (is_h_optimized(false2)))          /* the c-op */
+                {
+                  s7_pointer la1 = cadr(false2);
+                  s7_pointer la2 = caddr(false2);
+                  if ((is_fxable(sc, true2)) &&
+                      (((vars == 1) && (is_proper_list_2(sc, la1)) && (is_proper_list_2(sc, la2))) ||
+                       (((vars == 2) && (is_proper_list_3(sc, la1)) && (is_proper_list_3(sc, la2))))) &&
+                      (car(la1) == name) &&               (car(la2) == name) &&
+                      (is_fxable(sc, cadr(la1))) &&  (is_fxable(sc, cadr(la2))) &&
+                      ((vars == 1) || ((is_fxable(sc, caddr(la1))) && (is_fxable(sc, caddr(la2))))))
+                    {
+                      set_safe_optimize_op(body, (vars == 1) ? OP_RECUR_IF_A_A_IF_A_A_opLA_LAq : OP_RECUR_IF_A_A_IF_A_A_opLAA_LAAq);
+                      fx_annotate_arg(sc, cdr(body), args);
+                      fx_annotate_arg(sc, obody, args);
+                      fx_annotate_args(sc, cdr(false_p), args);
+                      fx_annotate_args(sc, cdr(la1), args);
+                      fx_annotate_args(sc, cdr(la2), args);
+                      fx_tree(sc, cdr(body), car(args), (vars == 2) ? cadr(args) : NULL, NULL, false);
+                      set_opt1_pair(body, cdr(false_p));
+                      set_opt3_pair(body, false2);
+                      set_opt3_pair(false2, cdr(la2));
+                      return(true);
+                    }
+                  if ((vars == 2) && (is_proper_list_3(sc, true2)) &&
+                      (car(true2) == name) &&
+                      (is_fxable(sc, cadr(true2))) && (is_fxable(sc, caddr(true2))) &&
+                      (is_fxable(sc, cadr(false2))) &&
+                      (is_proper_list_3(sc, la2)) &&
+                      (car(la2) == name) &&          /* actually, not needed because func is TC (not RECUR) if not == name */
+                      (is_fxable(sc, cadr(la2))) &&
+                      (is_fxable(sc, caddr(la2))))
+                    {
+                      set_safe_optimize_op(body, OP_RECUR_IF_A_A_IF_A_LAA_opA_LAAq);
+                      fx_annotate_arg(sc, cdr(body), args);       /* if_(A)... */
+                      fx_annotate_arg(sc, obody, args);           /* if_a_(A)... */
+                      fx_annotate_arg(sc, cdr(false_p), args);    /* if_a_a_if_(A)... */
+                      fx_annotate_args(sc, cdr(true2), args);     /* if_a_a_if_a_l(AA)... */
+                      fx_annotate_arg(sc, cdr(false2), args);     /* if_a_a_if_a_laa_op(A).. */
+                      fx_annotate_args(sc, cdr(la2), args);       /* if_a_a_if_a_laa_opa_l(AA)q */
+                      fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
+                      set_opt3_pair(body, false2);
+                      set_opt3_pair(false2, la2);
+                      return(true);
+                    }}}
+
+          if (car(false_p) == sc->and_symbol)
+            {
+              s7_pointer a1 = cadr(false_p);
+              s7_pointer a2 = caddr(false_p);
+              s7_pointer a3 = cadddr(false_p);
+              if ((is_fxable(sc, a1)) &&
+                  (is_proper_list_3(sc, a2)) && (is_proper_list_3(sc, a3)) &&
+                  (car(a2) == name) && (car(a3) == name) &&
+                  (is_fxable(sc, cadr(a2))) && (is_fxable(sc, cadr(a3))) &&
+                  (is_fxable(sc, caddr(a2))) && (is_fxable(sc, caddr(a3))))
+                {
+                  set_safe_optimize_op(body, OP_RECUR_IF_A_A_AND_A_LAA_LAA);
+                  fx_annotate_arg(sc, cdr(body), args);       /* if_(A)... */
+                  fx_annotate_arg(sc, cddr(body), args);      /* if_a_(A)... */
+                  fx_annotate_arg(sc, cdr(false_p), args);    /* if_a_a_and_(A)... */
+                  fx_annotate_args(sc, cdr(a2), args);        /* if_a_a_and_a_l(AA)... */
+                  fx_annotate_args(sc, cdr(a3), args);        /* if_a_a_and_a_laa_l(AA) */
+                  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
+                  set_opt3_pair(body, false_p);
+                  return(true);
+                }}}
 
       if ((is_fxable(sc, true_p)) &&
-	  (is_pair(false_p)) &&
-	  (is_h_optimized(false_p)) &&
-	  (is_pair(cdr(false_p))) &&
-	  (is_pair(cddr(false_p))))
-	orig = false_p;
+          (is_pair(false_p)) &&
+          (is_h_optimized(false_p)) &&
+          (is_pair(cdr(false_p))) &&
+          (is_pair(cddr(false_p))))
+        orig = false_p;
       else
-	if ((is_fxable(sc, false_p)) &&
-	    (is_pair(true_p)) &&
-	    (is_h_optimized(true_p)) &&
-	    (is_pair(cdr(true_p))) &&
-	    (is_pair(cddr(true_p))))
-	  {
-	    orig = true_p;
-	    /* true_p = false_p; */
-	    false_p = orig;
-	    obody = cdr(obody);
-	  }
+        if ((is_fxable(sc, false_p)) &&
+            (is_pair(true_p)) &&
+            (is_h_optimized(true_p)) &&
+            (is_pair(cdr(true_p))) &&
+            (is_pair(cddr(true_p))))
+          {
+            orig = true_p;
+            /* true_p = false_p; */
+            false_p = orig;
+            obody = cdr(obody);
+          }
 
       if (orig)
-	{
-	  if (is_null(cdddr(false_p))) /* 2 args to outer (c) func */
-	    {
-	      if ((is_fxable(sc, cadr(false_p))) || (is_fxable(sc, caddr(false_p))))
-		{
-		  s7_pointer la = (is_fxable(sc, cadr(false_p))) ? caddr(false_p) : cadr(false_p);
-		  if ((is_pair(la)) &&
-		      (car(la) == name) &&
-		      (is_pair(cdr(la))) &&
-		      (is_fxable(sc, cadr(la))))
-		    {
-		      if ((vars == 1) && (is_null(cddr(la))))
-			set_safe_optimize_op(body, (orig == cadddr(body)) ?
-					     ((la == cadr(false_p)) ? OP_RECUR_IF_A_A_opLA_Aq : OP_RECUR_IF_A_A_opA_LAq) :
-					     ((la == cadr(false_p)) ? OP_RECUR_IF_A_opLA_Aq_A : OP_RECUR_IF_A_opA_LAq_A));
-		      else
-			if ((vars == 2) &&
-			    (is_pair(cddr(la))) && (is_fxable(sc, caddr(la))) &&
-			    (is_null(cdddr(la))))
-			  set_safe_optimize_op(body, (orig == cadddr(body)) ? OP_RECUR_IF_A_A_opA_LAAq : OP_RECUR_IF_A_opA_LAAq_A);
-			else
-			  {
-			    if ((vars == 3) &&
-				(is_pair(cddr(la))) && (is_fxable(sc, caddr(la))) &&
-				(is_pair(cdddr(la))) && (is_fxable(sc, cadddr(la))) &&
-				(is_null(cddddr(la))) &&
-				(orig == cadddr(body)))
-			      set_safe_optimize_op(body, OP_RECUR_IF_A_A_opA_L3Aq);
-			    else return(false);
-			  }
-		      fx_annotate_arg(sc, cdr(body), args);
-		      fx_annotate_arg(sc, obody, args);
-		      fx_annotate_arg(sc, (la == cadr(false_p)) ? cddr(false_p) : cdr(false_p), args);
-		      fx_annotate_args(sc, cdr(la), args);
-		      fx_tree(sc, cdr(body), car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, false);
-		      set_opt3_pair(body, false_p);
-		      set_opt3_pair(false_p, la);
-		      return(true);
-		    }}
-	      else
-		{
-		  s7_pointer la1 = cadr(false_p);
-		  s7_pointer la2 = caddr(false_p);
-		  if ((vars == 1) &&
-		      (is_proper_list_2(sc, la1)) && (is_proper_list_2(sc, la2)) &&
-		      (car(la1) == name) && (car(la2) == name) &&
-		      (is_fxable(sc, cadr(la1))) && (is_fxable(sc, cadr(la2))))
-		    {
-		      set_safe_optimize_op(body, (orig == cadddr(body)) ? OP_RECUR_IF_A_A_opLA_LAq : OP_RECUR_IF_A_opLA_LAq_A);
-		      fx_annotate_arg(sc, cdr(body), args);
-		      fx_annotate_arg(sc, obody, args);
-		      fx_annotate_arg(sc, cdr(la1), args);
-		      fx_annotate_arg(sc, cdr(la2), args);
-		      fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
-		      set_opt3_pair(body, false_p);
-		      set_opt3_pair(false_p, la2);
-		      return(true);
-		    }}}
-	  else /* 3 args to c func */
-	    {
-	      if ((vars == 1) &&
-		  (is_pair(cdddr(false_p))) &&
-		  (is_null(cddddr(false_p))))
-		{
-		  s7_pointer la1 = cadr(false_p);
-		  s7_pointer la2 = caddr(false_p);
-		  s7_pointer la3 = cadddr(false_p);
-		  if ((is_proper_list_2(sc, la2)) && (is_proper_list_2(sc, la3)) &&
-		      (car(la2) == name) && (car(la3) == name) &&
-		      (is_fxable(sc, cadr(la2))) && (is_fxable(sc, cadr(la3))))
-		    {
-		      if ((is_proper_list_2(sc, la1)) && (car(la1) == name) && (is_fxable(sc, cadr(la1))))
-			{
-			  if (orig != cadddr(body))
-			    return(false);
-			  set_safe_optimize_op(body, OP_RECUR_IF_A_A_opLA_LA_LAq);
-			  fx_annotate_arg(sc, cdr(la1), args);
-			}
-		      else
-			if (is_fxable(sc, la1))
-			  {
-			    set_safe_optimize_op(body, (orig == cadddr(body)) ? OP_RECUR_IF_A_A_opA_LA_LAq : OP_RECUR_IF_A_opA_LA_LAq_A);
-			    fx_annotate_arg(sc, cdr(false_p), args);
-			  }
-			else return(false);
-		      fx_annotate_arg(sc, cdr(body), args);
-		      fx_annotate_arg(sc, obody, args);
-		      fx_annotate_arg(sc, cdr(la2), args);
-		      fx_annotate_arg(sc, cdr(la3), args);
-		      fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
-		      set_opt3_pair(body, false_p);
-		      set_opt3_pair(false_p, la3);
-		      return(true);
-		    }}}}}
+        {
+          if (is_null(cdddr(false_p))) /* 2 args to outer (c) func */
+            {
+              if ((is_fxable(sc, cadr(false_p))) || (is_fxable(sc, caddr(false_p))))
+                {
+                  s7_pointer la = (is_fxable(sc, cadr(false_p))) ? caddr(false_p) : cadr(false_p);
+                  if ((is_pair(la)) &&
+                      (car(la) == name) &&
+                      (is_pair(cdr(la))) &&
+                      (is_fxable(sc, cadr(la))))
+                    {
+                      if ((vars == 1) && (is_null(cddr(la))))
+                        set_safe_optimize_op(body, (orig == cadddr(body)) ?
+                                             ((la == cadr(false_p)) ? OP_RECUR_IF_A_A_opLA_Aq : OP_RECUR_IF_A_A_opA_LAq) :
+                                             ((la == cadr(false_p)) ? OP_RECUR_IF_A_opLA_Aq_A : OP_RECUR_IF_A_opA_LAq_A));
+                      else
+                        if ((vars == 2) &&
+                            (is_pair(cddr(la))) && (is_fxable(sc, caddr(la))) &&
+                            (is_null(cdddr(la))))
+                          set_safe_optimize_op(body, (orig == cadddr(body)) ? OP_RECUR_IF_A_A_opA_LAAq : OP_RECUR_IF_A_opA_LAAq_A);
+                        else
+                          {
+                            if ((vars == 3) &&
+                                (is_pair(cddr(la))) && (is_fxable(sc, caddr(la))) &&
+                                (is_pair(cdddr(la))) && (is_fxable(sc, cadddr(la))) &&
+                                (is_null(cddddr(la))) &&
+                                (orig == cadddr(body)))
+                              set_safe_optimize_op(body, OP_RECUR_IF_A_A_opA_L3Aq);
+                            else return(false);
+                          }
+                      fx_annotate_arg(sc, cdr(body), args);
+                      fx_annotate_arg(sc, obody, args);
+                      fx_annotate_arg(sc, (la == cadr(false_p)) ? cddr(false_p) : cdr(false_p), args);
+                      fx_annotate_args(sc, cdr(la), args);
+                      fx_tree(sc, cdr(body), car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, false);
+                      set_opt3_pair(body, false_p);
+                      set_opt3_pair(false_p, la);
+                      return(true);
+                    }}
+              else
+                {
+                  s7_pointer la1 = cadr(false_p);
+                  s7_pointer la2 = caddr(false_p);
+                  if ((vars == 1) &&
+                      (is_proper_list_2(sc, la1)) && (is_proper_list_2(sc, la2)) &&
+                      (car(la1) == name) && (car(la2) == name) &&
+                      (is_fxable(sc, cadr(la1))) && (is_fxable(sc, cadr(la2))))
+                    {
+                      set_safe_optimize_op(body, (orig == cadddr(body)) ? OP_RECUR_IF_A_A_opLA_LAq : OP_RECUR_IF_A_opLA_LAq_A);
+                      fx_annotate_arg(sc, cdr(body), args);
+                      fx_annotate_arg(sc, obody, args);
+                      fx_annotate_arg(sc, cdr(la1), args);
+                      fx_annotate_arg(sc, cdr(la2), args);
+                      fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
+                      set_opt3_pair(body, false_p);
+                      set_opt3_pair(false_p, la2);
+                      return(true);
+                    }}}
+          else /* 3 args to c func */
+            {
+              if ((vars == 1) &&
+                  (is_pair(cdddr(false_p))) &&
+                  (is_null(cddddr(false_p))))
+                {
+                  s7_pointer la1 = cadr(false_p);
+                  s7_pointer la2 = caddr(false_p);
+                  s7_pointer la3 = cadddr(false_p);
+                  if ((is_proper_list_2(sc, la2)) && (is_proper_list_2(sc, la3)) &&
+                      (car(la2) == name) && (car(la3) == name) &&
+                      (is_fxable(sc, cadr(la2))) && (is_fxable(sc, cadr(la3))))
+                    {
+                      if ((is_proper_list_2(sc, la1)) && (car(la1) == name) && (is_fxable(sc, cadr(la1))))
+                        {
+                          if (orig != cadddr(body))
+                            return(false);
+                          set_safe_optimize_op(body, OP_RECUR_IF_A_A_opLA_LA_LAq);
+                          fx_annotate_arg(sc, cdr(la1), args);
+                        }
+                      else
+                        if (is_fxable(sc, la1))
+                          {
+                            set_safe_optimize_op(body, (orig == cadddr(body)) ? OP_RECUR_IF_A_A_opA_LA_LAq : OP_RECUR_IF_A_opA_LA_LAq_A);
+                            fx_annotate_arg(sc, cdr(false_p), args);
+                          }
+                        else return(false);
+                      fx_annotate_arg(sc, cdr(body), args);
+                      fx_annotate_arg(sc, obody, args);
+                      fx_annotate_arg(sc, cdr(la2), args);
+                      fx_annotate_arg(sc, cdr(la3), args);
+                      fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
+                      set_opt3_pair(body, false_p);
+                      set_opt3_pair(false_p, la3);
+                      return(true);
+                    }}}}}
 
       if ((vars == 3) &&
-	  (is_fxable(sc, test)))
-	{
-	  s7_pointer true_p = caddr(body);
-	  s7_pointer false_p = cadddr(body);
-	  if ((is_fxable(sc, true_p)) &&
-	      (is_proper_list_4(sc, false_p)) &&
-	      (car(false_p) == name))
-	    {
-	      s7_pointer l3a = cdr(false_p);
-	      s7_pointer la1 = car(l3a);
-	      s7_pointer la2 = cadr(l3a);
-	      s7_pointer la3 = caddr(l3a);
-	      if ((is_proper_list_4(sc, la1)) && (is_proper_list_4(sc, la2)) && (is_proper_list_4(sc, la3)) &&
-		  (car(la1) == name) && (car(la2) == name) && (car(la3) == name) &&
-		  (is_fxable(sc, cadr(la1))) && (is_fxable(sc, cadr(la2))) && (is_fxable(sc, cadr(la3))) &&
-		  (is_fxable(sc, caddr(la1))) && (is_fxable(sc, caddr(la2))) && (is_fxable(sc, caddr(la3))) &&
-		  (is_fxable(sc, cadddr(la1))) && (is_fxable(sc, cadddr(la2))) && (is_fxable(sc, cadddr(la3))))
-		{
-		  set_safe_optimize_op(body, OP_RECUR_IF_A_A_LopL3A_L3A_L3Aq);
-		  fx_annotate_args(sc, cdr(la1), args);
-		  fx_annotate_args(sc, cdr(la2), args);
-		  fx_annotate_args(sc, cdr(la3), args);
-		  fx_annotate_arg(sc, cdr(body), args);
-		  fx_annotate_arg(sc, cddr(body), args);
-		  fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
-		  set_opt3_pair(body, false_p);
-		  set_opt3_pair(false_p, la3);
-		  return(true);
-		}}}
+          (is_fxable(sc, test)))
+        {
+          s7_pointer true_p = caddr(body);
+          s7_pointer false_p = cadddr(body);
+          if ((is_fxable(sc, true_p)) &&
+              (is_proper_list_4(sc, false_p)) &&
+              (car(false_p) == name))
+            {
+              s7_pointer l3a = cdr(false_p);
+              s7_pointer la1 = car(l3a);
+              s7_pointer la2 = cadr(l3a);
+              s7_pointer la3 = caddr(l3a);
+              if ((is_proper_list_4(sc, la1)) && (is_proper_list_4(sc, la2)) && (is_proper_list_4(sc, la3)) &&
+                  (car(la1) == name) && (car(la2) == name) && (car(la3) == name) &&
+                  (is_fxable(sc, cadr(la1))) && (is_fxable(sc, cadr(la2))) && (is_fxable(sc, cadr(la3))) &&
+                  (is_fxable(sc, caddr(la1))) && (is_fxable(sc, caddr(la2))) && (is_fxable(sc, caddr(la3))) &&
+                  (is_fxable(sc, cadddr(la1))) && (is_fxable(sc, cadddr(la2))) && (is_fxable(sc, cadddr(la3))))
+                {
+                  set_safe_optimize_op(body, OP_RECUR_IF_A_A_LopL3A_L3A_L3Aq);
+                  fx_annotate_args(sc, cdr(la1), args);
+                  fx_annotate_args(sc, cdr(la2), args);
+                  fx_annotate_args(sc, cdr(la3), args);
+                  fx_annotate_arg(sc, cdr(body), args);
+                  fx_annotate_arg(sc, cddr(body), args);
+                  fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
+                  set_opt3_pair(body, false_p);
+                  set_opt3_pair(false_p, la3);
+                  return(true);
+                }}}
   return(false);
 }
 
@@ -74697,164 +74697,164 @@ static bool check_recur(s7_scheme *sc, s7_pointer name, int32_t vars, s7_pointer
       s7_pointer la1 = caddr(or_p);
       s7_pointer la2 = cadddr(or_p);
       if ((is_fxable(sc, cadr(or_p))) &&
-	  (proper_list_length(la1) == 3) &&
-	  (proper_list_length(la2) == 3) &&
-	  (car(la1) == name) &&
-	  (car(la2) == name) &&
-	  (is_fxable(sc, cadr(la1))) &&
-	  (is_fxable(sc, caddr(la1))) &&
-	  (is_fxable(sc, cadr(la2))) &&
-	  (is_fxable(sc, caddr(la2))))
-	{
-	  set_safe_optimize_op(body, OP_RECUR_AND_A_OR_A_LAA_LAA);
-	  fx_annotate_args(sc, cdr(la1), args);
-	  fx_annotate_args(sc, cdr(la2), args);
-	  fx_annotate_arg(sc, cdr(body), args);
-	  fx_annotate_arg(sc, cdr(or_p), args);
-	  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
-	  set_opt3_pair(body, or_p);
-	  return(true);
-	}}
+          (proper_list_length(la1) == 3) &&
+          (proper_list_length(la2) == 3) &&
+          (car(la1) == name) &&
+          (car(la2) == name) &&
+          (is_fxable(sc, cadr(la1))) &&
+          (is_fxable(sc, caddr(la1))) &&
+          (is_fxable(sc, cadr(la2))) &&
+          (is_fxable(sc, caddr(la2))))
+        {
+          set_safe_optimize_op(body, OP_RECUR_AND_A_OR_A_LAA_LAA);
+          fx_annotate_args(sc, cdr(la1), args);
+          fx_annotate_args(sc, cdr(la2), args);
+          fx_annotate_arg(sc, cdr(body), args);
+          fx_annotate_arg(sc, cdr(or_p), args);
+          fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
+          set_opt3_pair(body, or_p);
+          return(true);
+        }}
 
   if (car(body) == sc->cond_symbol)
     {
       s7_pointer clause = cadr(body), clause2 = NULL;
       if ((is_proper_list_1(sc, (cdr(clause)))) &&
-	  (is_fxable(sc, car(clause))) &&
-	  (is_fxable(sc, cadr(clause))))
-	{
-	  s7_pointer la_clause = caddr(body);
-	  s7_int len = proper_list_length(body);
-	  if (len == 4)
-	    {
-	      if ((is_proper_list_2(sc, la_clause)) &&
-		  (is_fxable(sc, car(la_clause))))
-		{
-		  clause2 = la_clause;
-		  la_clause = cadddr(body);
-		}
-	      else return(false);
-	    }
-	  if ((is_proper_list_2(sc, la_clause)) &&
-	      ((car(la_clause) == sc->else_symbol) || (car(la_clause) == sc->T)) &&
-	      (is_pair(cadr(la_clause))))
-	    {
-	      la_clause = cadr(la_clause); /* (c_op arg (recur par)) or (c_op (recur) (recur)) or (op|l a laa) */
-	      if (is_proper_list_2(sc, cdr(la_clause)))
-		{
-		  if (is_h_optimized(la_clause))
-		    {
-		      if ((is_fxable(sc, cadr(la_clause))) &&
-			  ((len == 3) ||
-			   ((len == 4) && (vars == 2) &&
-			    (is_proper_list_3(sc, cadr(clause2))) &&
-			    (caadr(clause2) == name))))
-			{
-			  s7_pointer la = caddr(la_clause);
-			  if ((is_pair(la)) &&
-			      (car(la) == name) &&
-			      (is_pair(cdr(la))) &&
-			      (is_fxable(sc, cadr(la))) &&
-			      (((vars == 1) && (is_null(cddr(la)))) ||
-			       ((vars == 2) &&
-				(is_pair(cddr(la))) &&
-				(is_fxable(sc, caddr(la))) &&
-				(is_null(cdddr(la))))))
-			    {
-			      if (len == 3)
-				set_safe_optimize_op(body, (vars == 1) ? OP_RECUR_COND_A_A_opA_LAq : OP_RECUR_COND_A_A_opA_LAAq);
-			      else
-				{
-				  s7_pointer laa = cadr(clause2);
-				  if ((is_fxable(sc, cadr(laa))) && /* args to first laa */
-				      (is_fxable(sc, caddr(laa))))
-				    {
-				      set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_LAA_opA_LAAq);
-				      fx_annotate_arg(sc, clause2, args);
-				      fx_annotate_args(sc, cdr(laa), args);
-				    }
-				  else return(false);
-				}
-			      fx_annotate_args(sc, clause, args);
-			      fx_annotate_arg(sc, cdr(la_clause), args);
-			      fx_annotate_args(sc, cdr(la), args);
-			      fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
-			      set_opt3_pair(body, la_clause);
-			      set_opt3_pair(la_clause, la);
-			      return(true);
-			    }}
-		      else
-			{
-			  if ((len == 4) &&
-			      (is_fxable(sc, cadr(clause2))))
-			    {
-			      s7_pointer la1 = cadr(la_clause);
-			      s7_pointer la2 = caddr(la_clause);
-			      bool happy = false;
-
-			      if ((vars == 1) &&
-				  (is_proper_list_2(sc, la1)) && (is_proper_list_2(sc, la2)) &&
-				  (car(la1) == name) && (car(la2) == name) && (is_fxable(sc, cadr(la1))) && (is_fxable(sc, cadr(la2))))
-				{
-				  set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_A_opLA_LAq);
-				  fx_annotate_arg(sc, cdr(la1), args);
-				  happy = true;
-				}
-			      else
-				if ((vars == 2) &&
-				    /* (is_fxable(sc, cadr(clause2))) && */
-				    (is_proper_list_3(sc, la2)) && (car(la2) == name) && (is_fxable(sc, cadr(la2))) && (is_fxable(sc, caddr(la2))))
-				  {
-				    if (is_fxable(sc, la1))
-				      {
-					set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_A_opA_LAAq);
-					fx_annotate_arg(sc, cdr(la_clause), args);
-					happy = true;
-				      }
-				    else
-				      if ((is_proper_list_3(sc, la1)) &&
-					  (car(la1) == name) &&
-					  (is_fxable(sc, cadr(la1))) &&
-					  (is_fxable(sc, caddr(la1))))
-					{
-					  set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_A_opLAA_LAAq);
-					  fx_annotate_args(sc, cdr(la1), args);
-					  happy = true;
-					}}
-			      if (happy)
-				{
-				  set_opt3_pair(la_clause, cdr(la2));
-				  fx_annotate_args(sc, clause, args);
-				  fx_annotate_args(sc, clause2, args);
-				  fx_annotate_args(sc, cdr(la2), args);
-				  fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
-				  set_opt3_pair(body, la_clause);
-				  return(true);
-				}}}}
-		  else
-		    {
-		      if (clause2)
-			{
-			  s7_pointer laa = cadr(clause2);
-			  if ((vars == 2) && (len == 4) &&
-			      (is_proper_list_3(sc, laa)) && (car(laa) == name) && (is_fxable(sc, cadr(laa))) && (is_fxable(sc, caddr(laa))))
-			    {
-			      s7_pointer la1 = cadr(la_clause);
-			      s7_pointer la2 = caddr(la_clause);
-			      if ((is_fxable(sc, la1)) &&
-				  (is_proper_list_3(sc, la2)) && (car(la2) == name) && (is_fxable(sc, cadr(la2))) && (is_fxable(sc, caddr(la2))))
-				{
-				  set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_LAA_LopA_LAAq);
-				  fx_annotate_args(sc, clause, args);
-				  fx_annotate_arg(sc, clause2, args);
-				  fx_annotate_args(sc, cdr(laa), args);
-				  fx_annotate_arg(sc, cdr(la_clause), args);
-				  fx_annotate_args(sc, cdr(la2), args);
-				  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
-				  set_opt3_pair(body, la_clause);
-				  set_opt3_pair(la_clause, cdr(la2));
-				  return(true);
-				}}}}}}}}
+          (is_fxable(sc, car(clause))) &&
+          (is_fxable(sc, cadr(clause))))
+        {
+          s7_pointer la_clause = caddr(body);
+          s7_int len = proper_list_length(body);
+          if (len == 4)
+            {
+              if ((is_proper_list_2(sc, la_clause)) &&
+                  (is_fxable(sc, car(la_clause))))
+                {
+                  clause2 = la_clause;
+                  la_clause = cadddr(body);
+                }
+              else return(false);
+            }
+          if ((is_proper_list_2(sc, la_clause)) &&
+              ((car(la_clause) == sc->else_symbol) || (car(la_clause) == sc->T)) &&
+              (is_pair(cadr(la_clause))))
+            {
+              la_clause = cadr(la_clause); /* (c_op arg (recur par)) or (c_op (recur) (recur)) or (op|l a laa) */
+              if (is_proper_list_2(sc, cdr(la_clause)))
+                {
+                  if (is_h_optimized(la_clause))
+                    {
+                      if ((is_fxable(sc, cadr(la_clause))) &&
+                          ((len == 3) ||
+                           ((len == 4) && (vars == 2) &&
+                            (is_proper_list_3(sc, cadr(clause2))) &&
+                            (caadr(clause2) == name))))
+                        {
+                          s7_pointer la = caddr(la_clause);
+                          if ((is_pair(la)) &&
+                              (car(la) == name) &&
+                              (is_pair(cdr(la))) &&
+                              (is_fxable(sc, cadr(la))) &&
+                              (((vars == 1) && (is_null(cddr(la)))) ||
+                               ((vars == 2) &&
+                                (is_pair(cddr(la))) &&
+                                (is_fxable(sc, caddr(la))) &&
+                                (is_null(cdddr(la))))))
+                            {
+                              if (len == 3)
+                                set_safe_optimize_op(body, (vars == 1) ? OP_RECUR_COND_A_A_opA_LAq : OP_RECUR_COND_A_A_opA_LAAq);
+                              else
+                                {
+                                  s7_pointer laa = cadr(clause2);
+                                  if ((is_fxable(sc, cadr(laa))) && /* args to first laa */
+                                      (is_fxable(sc, caddr(laa))))
+                                    {
+                                      set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_LAA_opA_LAAq);
+                                      fx_annotate_arg(sc, clause2, args);
+                                      fx_annotate_args(sc, cdr(laa), args);
+                                    }
+                                  else return(false);
+                                }
+                              fx_annotate_args(sc, clause, args);
+                              fx_annotate_arg(sc, cdr(la_clause), args);
+                              fx_annotate_args(sc, cdr(la), args);
+                              fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
+                              set_opt3_pair(body, la_clause);
+                              set_opt3_pair(la_clause, la);
+                              return(true);
+                            }}
+                      else
+                        {
+                          if ((len == 4) &&
+                              (is_fxable(sc, cadr(clause2))))
+                            {
+                              s7_pointer la1 = cadr(la_clause);
+                              s7_pointer la2 = caddr(la_clause);
+                              bool happy = false;
+
+                              if ((vars == 1) &&
+                                  (is_proper_list_2(sc, la1)) && (is_proper_list_2(sc, la2)) &&
+                                  (car(la1) == name) && (car(la2) == name) && (is_fxable(sc, cadr(la1))) && (is_fxable(sc, cadr(la2))))
+                                {
+                                  set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_A_opLA_LAq);
+                                  fx_annotate_arg(sc, cdr(la1), args);
+                                  happy = true;
+                                }
+                              else
+                                if ((vars == 2) &&
+                                    /* (is_fxable(sc, cadr(clause2))) && */
+                                    (is_proper_list_3(sc, la2)) && (car(la2) == name) && (is_fxable(sc, cadr(la2))) && (is_fxable(sc, caddr(la2))))
+                                  {
+                                    if (is_fxable(sc, la1))
+                                      {
+                                        set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_A_opA_LAAq);
+                                        fx_annotate_arg(sc, cdr(la_clause), args);
+                                        happy = true;
+                                      }
+                                    else
+                                      if ((is_proper_list_3(sc, la1)) &&
+                                          (car(la1) == name) &&
+                                          (is_fxable(sc, cadr(la1))) &&
+                                          (is_fxable(sc, caddr(la1))))
+                                        {
+                                          set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_A_opLAA_LAAq);
+                                          fx_annotate_args(sc, cdr(la1), args);
+                                          happy = true;
+                                        }}
+                              if (happy)
+                                {
+                                  set_opt3_pair(la_clause, cdr(la2));
+                                  fx_annotate_args(sc, clause, args);
+                                  fx_annotate_args(sc, clause2, args);
+                                  fx_annotate_args(sc, cdr(la2), args);
+                                  fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
+                                  set_opt3_pair(body, la_clause);
+                                  return(true);
+                                }}}}
+                  else
+                    {
+                      if (clause2)
+                        {
+                          s7_pointer laa = cadr(clause2);
+                          if ((vars == 2) && (len == 4) &&
+                              (is_proper_list_3(sc, laa)) && (car(laa) == name) && (is_fxable(sc, cadr(laa))) && (is_fxable(sc, caddr(laa))))
+                            {
+                              s7_pointer la1 = cadr(la_clause);
+                              s7_pointer la2 = caddr(la_clause);
+                              if ((is_fxable(sc, la1)) &&
+                                  (is_proper_list_3(sc, la2)) && (car(la2) == name) && (is_fxable(sc, cadr(la2))) && (is_fxable(sc, caddr(la2))))
+                                {
+                                  set_safe_optimize_op(body, OP_RECUR_COND_A_A_A_LAA_LopA_LAAq);
+                                  fx_annotate_args(sc, clause, args);
+                                  fx_annotate_arg(sc, clause2, args);
+                                  fx_annotate_args(sc, cdr(laa), args);
+                                  fx_annotate_arg(sc, cdr(la_clause), args);
+                                  fx_annotate_args(sc, cdr(la2), args);
+                                  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
+                                  set_opt3_pair(body, la_clause);
+                                  set_opt3_pair(la_clause, cdr(la2));
+                                  return(true);
+                                }}}}}}}}
   return(false);
 }
 
@@ -74865,41 +74865,41 @@ static bool check_tc_when(s7_scheme *sc, const s7_pointer name, int32_t vars, s7
     {
       s7_pointer p;
       for (p = cddr(body); is_pair(cdr(p)); p = cdr(p))
-	if (!is_fxable(sc, car(p)))
-	  break;
+        if (!is_fxable(sc, car(p)))
+          break;
       if ((is_proper_list_1(sc, p)) &&     /* i.e. p is the last form in the when body */
-	  (is_pair(car(p))) &&
-	  (caar(p) == name))
-	{
-	  s7_pointer laa = car(p);
-	  set_opt3_pair(body, p);
-	  if ((is_pair(cdr(laa))) && (is_fxable(sc, cadr(laa))))
-	    {
-	      if (is_null(cddr(laa)))
-		{
-		  if (vars != 1) return(false);
-		  set_safe_optimize_op(body, OP_TC_WHEN_LA);
-		}
-	      else
-		if (is_fxable(sc, caddr(laa)))
-		  {
-		    if (is_null(cdddr(laa)))
-		      {
-			if (vars != 2) return(false);
-			set_safe_optimize_op(body, OP_TC_WHEN_LAA);
-		      }
-		    else
-		      if ((vars == 3) && (is_fxable(sc, cadddr(laa))) && (is_null(cddddr(laa))))
-			set_safe_optimize_op(body, OP_TC_WHEN_L3A);
-		      else return(false);
-		  }
-	      fx_annotate_arg(sc, cdr(body), args);
-	      for (p = cddr(body); is_pair(cdr(p)); p = cdr(p))
-		fx_annotate_arg(sc, p, args);
-	      fx_annotate_args(sc, cdr(laa), args);
-	      fx_tree(sc, cdr(body), car(args), (is_pair(cdr(args))) ? cadr(args) : NULL, ((is_pair(cdr(args))) && (is_pair(cddr(args)))) ? caddr(args) : NULL, false);
-	      return(true);
-	    }}}
+          (is_pair(car(p))) &&
+          (caar(p) == name))
+        {
+          s7_pointer laa = car(p);
+          set_opt3_pair(body, p);
+          if ((is_pair(cdr(laa))) && (is_fxable(sc, cadr(laa))))
+            {
+              if (is_null(cddr(laa)))
+                {
+                  if (vars != 1) return(false);
+                  set_safe_optimize_op(body, OP_TC_WHEN_LA);
+                }
+              else
+                if (is_fxable(sc, caddr(laa)))
+                  {
+                    if (is_null(cdddr(laa)))
+                      {
+                        if (vars != 2) return(false);
+                        set_safe_optimize_op(body, OP_TC_WHEN_LAA);
+                      }
+                    else
+                      if ((vars == 3) && (is_fxable(sc, cadddr(laa))) && (is_null(cddddr(laa))))
+                        set_safe_optimize_op(body, OP_TC_WHEN_L3A);
+                      else return(false);
+                  }
+              fx_annotate_arg(sc, cdr(body), args);
+              for (p = cddr(body); is_pair(cdr(p)); p = cdr(p))
+                fx_annotate_arg(sc, p, args);
+              fx_annotate_args(sc, cdr(laa), args);
+              fx_tree(sc, cdr(body), car(args), (is_pair(cdr(args))) ? cadr(args) : NULL, ((is_pair(cdr(args))) && (is_pair(cddr(args)))) ? caddr(args) : NULL, false);
+              return(true);
+            }}}
   return(false);
 }
 
@@ -74913,49 +74913,49 @@ static bool check_tc_case(s7_scheme *sc, s7_pointer name, s7_pointer args, s7_po
     {
       s7_pointer clause = car(clauses), result;
       if (is_proper_list_1(sc, car(clause)))
-	{
-	  if (!is_simple(caar(clause)))
-	    return(false); /* even if key is a small int, selector might be a mutable alias of that, so = will fail */
-	  set_opt1_any(clauses, caar(clause));
-	}
+        {
+          if (!is_simple(caar(clause)))
+            return(false); /* even if key is a small int, selector might be a mutable alias of that, so = will fail */
+          set_opt1_any(clauses, caar(clause));
+        }
       else
-	{
-	  if ((car(clause) != sc->else_symbol) ||
-	      (!is_null(cdr(clauses))))
-	    return(false);
-	  got_else = true;
-	}
+        {
+          if ((car(clause) != sc->else_symbol) ||
+              (!is_null(cdr(clauses))))
+            return(false);
+          got_else = true;
+        }
       set_opt2_any(clauses, NULL);
       result = cdr(clause);
       if (is_null(result))
-	return(false);
+        return(false);
       if (is_proper_list_1(sc, result))
-	{
-	  if (is_fxable(sc, car(result)))
-	    {
-	      fx_annotate_arg(sc, result, args);
-	      set_opt2_any(clauses, result);
-	    }
-	  else
-	    if ((is_proper_list_2(sc, car(result))) &&
-		(caar(result) == name) &&
-		(is_fxable(sc, cadar(result))))
-	      {
-		set_has_tc(car(result));
-		set_opt2_any(clauses, car(result));
-		fx_annotate_arg(sc, cdar(result), args);
-	      }
-	    else results_fxable = false;
-	}
+        {
+          if (is_fxable(sc, car(result)))
+            {
+              fx_annotate_arg(sc, result, args);
+              set_opt2_any(clauses, result);
+            }
+          else
+            if ((is_proper_list_2(sc, car(result))) &&
+                (caar(result) == name) &&
+                (is_fxable(sc, cadar(result))))
+              {
+                set_has_tc(car(result));
+                set_opt2_any(clauses, car(result));
+                fx_annotate_arg(sc, cdar(result), args);
+              }
+            else results_fxable = false;
+        }
       else results_fxable = false;
       if (!opt2_any(clauses))
-	{
-	  if (car(result) == sc->feed_to_symbol)
-	    return(false);
-	  if (tree_count(sc, name, result, 0) != 0)
-	    return(false);
-	  set_opt2_any(clauses, result);
-	}}
+        {
+          if (car(result) == sc->feed_to_symbol)
+            return(false);
+          if (tree_count(sc, name, result, 0) != 0)
+            return(false);
+          set_opt2_any(clauses, result);
+        }}
   if ((!got_else) || (!is_null(clauses)))
     return(false);
   set_optimize_op(body, OP_TC_CASE_LA);
@@ -74973,145 +74973,145 @@ static bool check_tc_cond(s7_scheme *sc, s7_pointer name, int32_t vars, s7_point
     {
       p = cdr(p);
       if ((is_pair(p)) && (is_null(cdr(p))) && ((caar(p) == sc->else_symbol) || (caar(p) == sc->T)))
-	{
-	  s7_pointer else_clause;
-	  if (((vars != 1) && (vars != 2)) || (tree_count(sc, name, body, 0) != 1)) return(false);
-	  else_clause = cdar(p);
-	  if (is_proper_list_1(sc, else_clause))
-	    {
-	      s7_pointer la = car(else_clause);
-	      fx_annotate_arg(sc, clause1, args);
-	      if ((is_pair(la)) && (car(la) == name) && (is_pair(cdr(la))))
-		{
-		  if ((is_fxable(sc, cadr(la))) &&
-		      ((((vars == 1) && (is_null(cddr(la)))) ||
-			((vars == 2) && (is_pair(cddr(la))) && (is_null(cdddr(la))) && (is_fxable(sc, caddr(la)))))))
-		    {
-		      bool zs_fxable = is_fxable(sc, cadr(clause1));
-		      set_optimize_op(body, (vars == 1) ? OP_TC_COND_A_Z_LA : OP_TC_COND_A_Z_LAA);
-		      if (zs_fxable) fx_annotate_arg(sc, cdr(clause1), args);
-		      fx_annotate_args(sc, cdr(la), args);
-		      fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
-		      if (zs_fxable) set_optimized(body);
-		      set_opt1_pair(cdr(body), cdadr(body));
-		      set_opt3_pair(cdr(body), cdadr(caddr(body)));
-		      return(zs_fxable);
-		    }}
-	      else
-		{
-		  la = cadr(clause1);
-		  if ((is_pair(la)) && (car(la) == name) && (is_pair(cdr(la))))
-		    {
-		      if ((is_fxable(sc, cadr(la))) &&
-			  (((vars == 1) && (is_null(cddr(la)))) ||
-			   ((vars == 2) && (is_pair(cddr(la))) && (is_null(cdddr(la))) && (is_fxable(sc, caddr(la))))))
-			{
-			  bool zs_fxable = is_fxable(sc, car(else_clause));
-			  set_optimize_op(body, (vars == 1) ? OP_TC_COND_A_LA_Z : OP_TC_COND_A_LAA_Z);
-			  if (zs_fxable) fx_annotate_arg(sc, else_clause, args);
-			  fx_annotate_args(sc, cdr(la), args);
-			  fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
-			  if (zs_fxable) set_optimized(body);
-			  set_opt1_pair(cdr(body), cdaddr(body));
-			  set_opt3_pair(cdr(body), cdadr(cadr(body)));
-			  return(zs_fxable);
-			}}}}
-	  return(false);
-	}
+        {
+          s7_pointer else_clause;
+          if (((vars != 1) && (vars != 2)) || (tree_count(sc, name, body, 0) != 1)) return(false);
+          else_clause = cdar(p);
+          if (is_proper_list_1(sc, else_clause))
+            {
+              s7_pointer la = car(else_clause);
+              fx_annotate_arg(sc, clause1, args);
+              if ((is_pair(la)) && (car(la) == name) && (is_pair(cdr(la))))
+                {
+                  if ((is_fxable(sc, cadr(la))) &&
+                      ((((vars == 1) && (is_null(cddr(la)))) ||
+                        ((vars == 2) && (is_pair(cddr(la))) && (is_null(cdddr(la))) && (is_fxable(sc, caddr(la)))))))
+                    {
+                      bool zs_fxable = is_fxable(sc, cadr(clause1));
+                      set_optimize_op(body, (vars == 1) ? OP_TC_COND_A_Z_LA : OP_TC_COND_A_Z_LAA);
+                      if (zs_fxable) fx_annotate_arg(sc, cdr(clause1), args);
+                      fx_annotate_args(sc, cdr(la), args);
+                      fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
+                      if (zs_fxable) set_optimized(body);
+                      set_opt1_pair(cdr(body), cdadr(body));
+                      set_opt3_pair(cdr(body), cdadr(caddr(body)));
+                      return(zs_fxable);
+                    }}
+              else
+                {
+                  la = cadr(clause1);
+                  if ((is_pair(la)) && (car(la) == name) && (is_pair(cdr(la))))
+                    {
+                      if ((is_fxable(sc, cadr(la))) &&
+                          (((vars == 1) && (is_null(cddr(la)))) ||
+                           ((vars == 2) && (is_pair(cddr(la))) && (is_null(cdddr(la))) && (is_fxable(sc, caddr(la))))))
+                        {
+                          bool zs_fxable = is_fxable(sc, car(else_clause));
+                          set_optimize_op(body, (vars == 1) ? OP_TC_COND_A_LA_Z : OP_TC_COND_A_LAA_Z);
+                          if (zs_fxable) fx_annotate_arg(sc, else_clause, args);
+                          fx_annotate_args(sc, cdr(la), args);
+                          fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
+                          if (zs_fxable) set_optimized(body);
+                          set_opt1_pair(cdr(body), cdaddr(body));
+                          set_opt3_pair(cdr(body), cdadr(cadr(body)));
+                          return(zs_fxable);
+                        }}}}
+          return(false);
+        }
       if (is_proper_list_2(sc, p))
-	{
-	  s7_pointer clause2 = car(p);
-	  if ((is_proper_list_2(sc, clause2)) &&
-	      (is_fxable(sc, car(clause2))))
-	    {
-	      s7_pointer else_p = cdr(p);
-	      s7_pointer else_clause = car(else_p);
-
-	      if ((is_proper_list_2(sc, else_clause)) &&
-		  ((car(else_clause) == sc->else_symbol) || (car(else_clause) == sc->T)))
-		{
-		  bool zs_fxable = true;
-		  if ((vars == 2) && /* ...laa_laa case */
-		      (is_proper_list_3(sc, cadr(clause2))) && (caadr(clause2) == name) &&
-		      (is_fxable(sc, cadadr(clause2))) && (is_safe_fxable(sc, caddadr(clause2))) &&
-		      (is_proper_list_3(sc, cadr(else_clause))) && (caadr(else_clause) == name) &&
-		      (is_fxable(sc, cadadr(else_clause))) && (is_safe_fxable(sc, caddadr(else_clause))))
-		    {
-		      set_optimize_op(body, OP_TC_COND_A_Z_A_LAA_LAA);
-		      if (is_fxable(sc, cadr(clause1)))
-			fx_annotate_args(sc, clause1, args);
-		      else
-			{
-			  fx_annotate_arg(sc, clause1, args);
-			  zs_fxable = false;
-			}
-		      fx_annotate_arg(sc, clause2, args);
-		      fx_annotate_args(sc, cdadr(clause2), args);
-		      fx_annotate_args(sc, cdadr(else_clause), args);
-		      fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
-		      set_opt3_pair(body, cadr(else_clause));
-		      if (zs_fxable) set_optimized(body);
-		      return(zs_fxable);
-		    }
-
-		  if ((tree_count(sc, name, body, 0) == 1) && /* needed to filter out cond_a_a_a_laa_opa_laa */
-
-		      (((is_pair(cadr(else_clause))) && (caadr(else_clause) == name) &&
-			(is_pair(cdadr(else_clause))) && (is_fxable(sc, cadadr(else_clause))) &&
-			(((vars == 1) && (is_null(cddadr(else_clause)))) ||
-			 ((vars == 2) && (is_proper_list_3(sc, cadr(else_clause))) && (is_fxable(sc, caddadr(else_clause)))))) ||
-
-		       ((is_pair(cadr(clause2))) && (caadr(clause2) == name) &&
-			(is_pair(cdadr(clause2))) && (is_fxable(sc, cadadr(clause2))) &&
-			(((vars == 1) && (is_null(cddadr(clause2)))) ||
-			 ((vars == 2) && (is_pair(cddadr(clause2))) && (is_fxable(sc, caddadr(clause2))) && (is_null(cdddr(cadr(clause2)))))))))
-		    {
-		      s7_pointer test2 = clause2;
-		      s7_pointer la_test = else_clause;
-		      if (vars == 1)
-			{
-			  if ((is_pair(cadr(else_clause))) && (caadr(else_clause) == name))
-			    set_optimize_op(body, OP_TC_COND_A_Z_A_Z_LA);
-			  else
-			    {
-			      set_optimize_op(body, OP_TC_COND_A_Z_A_LA_Z);
-			      test2 = else_clause;
-			      la_test = clause2;
-			      fx_annotate_arg(sc, clause2, args);
-			    }}
-		      else
-			if ((is_pair(cadr(else_clause))) && (caadr(else_clause) == name))
-			  {
-			    set_opt3_pair(body, cdadr(else_clause));
-			    set_optimize_op(body, OP_TC_COND_A_Z_A_Z_LAA);
-			  }
-			else
-			  {
-			    set_optimize_op(body, OP_TC_COND_A_Z_A_LAA_Z);
-			    test2 = else_clause;
-			    la_test = clause2;
-			    set_opt3_pair(body, cdadr(la_test));
-			    fx_annotate_arg(sc, clause2, args);
-			  }
-		      if (is_fxable(sc, cadr(clause1)))
-			fx_annotate_args(sc, clause1, args);
-		      else
-			{
-			  fx_annotate_arg(sc, clause1, args);
-			  zs_fxable = false;
-			}
-		      if (is_fxable(sc, cadr(test2)))
-			fx_annotate_args(sc, test2, args);
-		      else
-			{
-			  fx_annotate_arg(sc, test2, args);
-			  zs_fxable = false;
-			}
-		      fx_annotate_args(sc, cdadr(la_test), args);
-		      fx_tree(sc, cdr(body), car(args), (vars == 2) ? cadr(args) : NULL, NULL, false);
-		      if (zs_fxable) set_optimized(body);
-		      return(zs_fxable);
-		    }}}}}
+        {
+          s7_pointer clause2 = car(p);
+          if ((is_proper_list_2(sc, clause2)) &&
+              (is_fxable(sc, car(clause2))))
+            {
+              s7_pointer else_p = cdr(p);
+              s7_pointer else_clause = car(else_p);
+
+              if ((is_proper_list_2(sc, else_clause)) &&
+                  ((car(else_clause) == sc->else_symbol) || (car(else_clause) == sc->T)))
+                {
+                  bool zs_fxable = true;
+                  if ((vars == 2) && /* ...laa_laa case */
+                      (is_proper_list_3(sc, cadr(clause2))) && (caadr(clause2) == name) &&
+                      (is_fxable(sc, cadadr(clause2))) && (is_safe_fxable(sc, caddadr(clause2))) &&
+                      (is_proper_list_3(sc, cadr(else_clause))) && (caadr(else_clause) == name) &&
+                      (is_fxable(sc, cadadr(else_clause))) && (is_safe_fxable(sc, caddadr(else_clause))))
+                    {
+                      set_optimize_op(body, OP_TC_COND_A_Z_A_LAA_LAA);
+                      if (is_fxable(sc, cadr(clause1)))
+                        fx_annotate_args(sc, clause1, args);
+                      else
+                        {
+                          fx_annotate_arg(sc, clause1, args);
+                          zs_fxable = false;
+                        }
+                      fx_annotate_arg(sc, clause2, args);
+                      fx_annotate_args(sc, cdadr(clause2), args);
+                      fx_annotate_args(sc, cdadr(else_clause), args);
+                      fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
+                      set_opt3_pair(body, cadr(else_clause));
+                      if (zs_fxable) set_optimized(body);
+                      return(zs_fxable);
+                    }
+
+                  if ((tree_count(sc, name, body, 0) == 1) && /* needed to filter out cond_a_a_a_laa_opa_laa */
+
+                      (((is_pair(cadr(else_clause))) && (caadr(else_clause) == name) &&
+                        (is_pair(cdadr(else_clause))) && (is_fxable(sc, cadadr(else_clause))) &&
+                        (((vars == 1) && (is_null(cddadr(else_clause)))) ||
+                         ((vars == 2) && (is_proper_list_3(sc, cadr(else_clause))) && (is_fxable(sc, caddadr(else_clause)))))) ||
+
+                       ((is_pair(cadr(clause2))) && (caadr(clause2) == name) &&
+                        (is_pair(cdadr(clause2))) && (is_fxable(sc, cadadr(clause2))) &&
+                        (((vars == 1) && (is_null(cddadr(clause2)))) ||
+                         ((vars == 2) && (is_pair(cddadr(clause2))) && (is_fxable(sc, caddadr(clause2))) && (is_null(cdddr(cadr(clause2)))))))))
+                    {
+                      s7_pointer test2 = clause2;
+                      s7_pointer la_test = else_clause;
+                      if (vars == 1)
+                        {
+                          if ((is_pair(cadr(else_clause))) && (caadr(else_clause) == name))
+                            set_optimize_op(body, OP_TC_COND_A_Z_A_Z_LA);
+                          else
+                            {
+                              set_optimize_op(body, OP_TC_COND_A_Z_A_LA_Z);
+                              test2 = else_clause;
+                              la_test = clause2;
+                              fx_annotate_arg(sc, clause2, args);
+                            }}
+                      else
+                        if ((is_pair(cadr(else_clause))) && (caadr(else_clause) == name))
+                          {
+                            set_opt3_pair(body, cdadr(else_clause));
+                            set_optimize_op(body, OP_TC_COND_A_Z_A_Z_LAA);
+                          }
+                        else
+                          {
+                            set_optimize_op(body, OP_TC_COND_A_Z_A_LAA_Z);
+                            test2 = else_clause;
+                            la_test = clause2;
+                            set_opt3_pair(body, cdadr(la_test));
+                            fx_annotate_arg(sc, clause2, args);
+                          }
+                      if (is_fxable(sc, cadr(clause1)))
+                        fx_annotate_args(sc, clause1, args);
+                      else
+                        {
+                          fx_annotate_arg(sc, clause1, args);
+                          zs_fxable = false;
+                        }
+                      if (is_fxable(sc, cadr(test2)))
+                        fx_annotate_args(sc, test2, args);
+                      else
+                        {
+                          fx_annotate_arg(sc, test2, args);
+                          zs_fxable = false;
+                        }
+                      fx_annotate_args(sc, cdadr(la_test), args);
+                      fx_tree(sc, cdr(body), car(args), (vars == 2) ? cadr(args) : NULL, NULL, false);
+                      if (zs_fxable) set_optimized(body);
+                      return(zs_fxable);
+                    }}}}}
   return(false);
 }
 
@@ -75123,113 +75123,113 @@ static bool check_tc_let(s7_scheme *sc, const s7_pointer name, int32_t vars, s7_
     {
       s7_pointer test_expr = cadr(let_body);
       if (is_fxable(sc, test_expr))
-	{
-	  if ((car(let_body) == sc->if_symbol) && (is_pair(cdddr(let_body))))
-	    {
-	      s7_pointer laa = cadddr(let_body);
-	      if ((is_pair(laa)) && /* else caddr is laa and cadddr is z */
-		  (car(laa) == name) &&
-		  (((vars == 1) && (is_proper_list_2(sc, laa))) ||
-		   ((vars == 2) && (is_proper_list_3(sc, laa)) && (is_safe_fxable(sc, caddr(laa))))) &&
-		  (is_fxable(sc, cadr(laa))))
-		{
-		  bool z_fxable;
-		  set_optimize_op(body, (vars == 1) ? OP_TC_LET_IF_A_Z_LA : OP_TC_LET_IF_A_Z_LAA);
-		  fx_annotate_arg(sc, cdaadr(body), args);  /* let var binding, caadr: (x (- y 1)) etc */
-		  fx_tree(sc, cdaadr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false); /* these are references to laa args, applied to the let var binding */
-		  fx_annotate_arg(sc, cdr(let_body), args); /* test_expr */
-		  fx_annotate_args(sc, cdr(laa), args);
-		  z_fxable = is_fxable(sc, caddr(let_body));
-		  if (z_fxable) fx_annotate_arg(sc, cddr(let_body), args);
-		  fx_tree(sc, cdr(let_body), car(caadr(body)), NULL, NULL, false);
-		  fx_tree_outer(sc, cdr(let_body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
-		  if (z_fxable) set_optimized(body);
-		  return(z_fxable);
-		}}
-	  else
-	    {
-	      s7_pointer p;
-	      for (p = cddr(let_body); is_pair(cdr(p)); p = cdr(p))
-		if (!is_fxable(sc, car(p)))
-		  break;
-	      if ((is_proper_list_1(sc, p)) &&
-		  (is_proper_list_3(sc, car(p))) &&
-		  (caar(p) == name))
-		{
-		  s7_pointer laa = car(p);
-		  if ((is_fxable(sc, cadr(laa))) &&
-		      (is_safe_fxable(sc, caddr(laa))))
-		    {
-		      set_optimize_op(body, (car(let_body) == sc->when_symbol) ? OP_TC_LET_WHEN_LAA : OP_TC_LET_UNLESS_LAA);
-		      fx_annotate_arg(sc, cdaadr(body), args);  /* outer var */
-		      fx_annotate_arg(sc, cdr(let_body), args); /* test */
-		      for (p = cddr(let_body); is_pair(cdr(p)); p = cdr(p))
-			fx_annotate_arg(sc, p, args);
-		      fx_annotate_args(sc, cdr(laa), args);
-		      fx_tree(sc, cdaadr(body), car(args), cadr(args), NULL, false); /* these are references to the outer let */
-		      fx_tree(sc, cdr(let_body), car(caadr(body)), NULL, NULL, false);
-		      fx_tree_outer(sc, cdr(let_body), car(args), cadr(args), NULL, false);
-		      set_optimized(body);
-		      return(true);
-		    }}}}}
+        {
+          if ((car(let_body) == sc->if_symbol) && (is_pair(cdddr(let_body))))
+            {
+              s7_pointer laa = cadddr(let_body);
+              if ((is_pair(laa)) && /* else caddr is laa and cadddr is z */
+                  (car(laa) == name) &&
+                  (((vars == 1) && (is_proper_list_2(sc, laa))) ||
+                   ((vars == 2) && (is_proper_list_3(sc, laa)) && (is_safe_fxable(sc, caddr(laa))))) &&
+                  (is_fxable(sc, cadr(laa))))
+                {
+                  bool z_fxable;
+                  set_optimize_op(body, (vars == 1) ? OP_TC_LET_IF_A_Z_LA : OP_TC_LET_IF_A_Z_LAA);
+                  fx_annotate_arg(sc, cdaadr(body), args);  /* let var binding, caadr: (x (- y 1)) etc */
+                  fx_tree(sc, cdaadr(body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false); /* these are references to laa args, applied to the let var binding */
+                  fx_annotate_arg(sc, cdr(let_body), args); /* test_expr */
+                  fx_annotate_args(sc, cdr(laa), args);
+                  z_fxable = is_fxable(sc, caddr(let_body));
+                  if (z_fxable) fx_annotate_arg(sc, cddr(let_body), args);
+                  fx_tree(sc, cdr(let_body), car(caadr(body)), NULL, NULL, false);
+                  fx_tree_outer(sc, cdr(let_body), car(args), (vars == 1) ? NULL : cadr(args), NULL, false);
+                  if (z_fxable) set_optimized(body);
+                  return(z_fxable);
+                }}
+          else
+            {
+              s7_pointer p;
+              for (p = cddr(let_body); is_pair(cdr(p)); p = cdr(p))
+                if (!is_fxable(sc, car(p)))
+                  break;
+              if ((is_proper_list_1(sc, p)) &&
+                  (is_proper_list_3(sc, car(p))) &&
+                  (caar(p) == name))
+                {
+                  s7_pointer laa = car(p);
+                  if ((is_fxable(sc, cadr(laa))) &&
+                      (is_safe_fxable(sc, caddr(laa))))
+                    {
+                      set_optimize_op(body, (car(let_body) == sc->when_symbol) ? OP_TC_LET_WHEN_LAA : OP_TC_LET_UNLESS_LAA);
+                      fx_annotate_arg(sc, cdaadr(body), args);  /* outer var */
+                      fx_annotate_arg(sc, cdr(let_body), args); /* test */
+                      for (p = cddr(let_body); is_pair(cdr(p)); p = cdr(p))
+                        fx_annotate_arg(sc, p, args);
+                      fx_annotate_args(sc, cdr(laa), args);
+                      fx_tree(sc, cdaadr(body), car(args), cadr(args), NULL, false); /* these are references to the outer let */
+                      fx_tree(sc, cdr(let_body), car(caadr(body)), NULL, NULL, false);
+                      fx_tree_outer(sc, cdr(let_body), car(args), cadr(args), NULL, false);
+                      set_optimized(body);
+                      return(true);
+                    }}}}}
   else
     {
       if (car(let_body) == sc->cond_symbol) /* vars=#loop pars, args=names thereof (arglist) */
-	{
-	  s7_pointer var_name;
-	  bool all_fxable = true;
-	  for (s7_pointer p = cdr(let_body); is_pair(p); p = cdr(p))
-	    {
-	      s7_pointer clause = car(p);
-	      if ((is_proper_list_2(sc, clause)) &&
-		  (is_fxable(sc, car(clause)))) /* test is ok */
-		{
-		  s7_pointer result;
-
-		  if ((!is_pair(cdr(p))) &&
-		      (car(clause) != sc->else_symbol) && (car(clause) != sc->T))
-		    return(false);
-		  result = cadr(clause);
-		  if ((is_pair(result)) &&
-		      (car(result) == name))    /* result is recursive call */
-		    {
-		      s7_int i = 0;
-		      for (s7_pointer arg = cdr(result); is_pair(arg); i++, arg = cdr(arg))
-			if (!is_fxable(sc, car(arg)))
-			  return(false);
-		      if (i != vars)
-			return(false);
-		    }}
-	      else return(false);
-	    }
-	  /* cond form looks ok */
-	  set_optimize_op(body, OP_TC_LET_COND);
-	  set_opt3_arglen(cdr(body), vars);
-	  fx_annotate_arg(sc, cdaadr(body), args);   /* let var */
-	  if (vars > 0)
-	    fx_tree(sc, cdaadr(body), car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, vars > 3);
-	  var_name = caaadr(body);
-	  for (s7_pointer p = cdr(let_body); is_pair(p); p = cdr(p))
-	    {
-	      s7_pointer clause = car(p);
-	      s7_pointer result = cadr(clause);
-	      fx_annotate_arg(sc, clause, args);
-	      if ((is_pair(result)) && (car(result) == name))
-		{
-		  set_has_tc(cdr(clause));
-		  fx_annotate_args(sc, cdr(result), args);
-		}
-	      else
-		if (is_fxable(sc, result))
-		  fx_annotate_arg(sc, cdr(clause), args);
-		else all_fxable = false;
-	      fx_tree(sc, clause, var_name, NULL, NULL, false); /* just 1 let var */
-	      if (vars > 0)
-		fx_tree_outer(sc, clause, car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, vars > 3);
-	    }
-	  if (all_fxable) set_optimized(body);
-	  return(all_fxable);
-	}}
+        {
+          s7_pointer var_name;
+          bool all_fxable = true;
+          for (s7_pointer p = cdr(let_body); is_pair(p); p = cdr(p))
+            {
+              s7_pointer clause = car(p);
+              if ((is_proper_list_2(sc, clause)) &&
+                  (is_fxable(sc, car(clause)))) /* test is ok */
+                {
+                  s7_pointer result;
+
+                  if ((!is_pair(cdr(p))) &&
+                      (car(clause) != sc->else_symbol) && (car(clause) != sc->T))
+                    return(false);
+                  result = cadr(clause);
+                  if ((is_pair(result)) &&
+                      (car(result) == name))    /* result is recursive call */
+                    {
+                      s7_int i = 0;
+                      for (s7_pointer arg = cdr(result); is_pair(arg); i++, arg = cdr(arg))
+                        if (!is_fxable(sc, car(arg)))
+                          return(false);
+                      if (i != vars)
+                        return(false);
+                    }}
+              else return(false);
+            }
+          /* cond form looks ok */
+          set_optimize_op(body, OP_TC_LET_COND);
+          set_opt3_arglen(cdr(body), vars);
+          fx_annotate_arg(sc, cdaadr(body), args);   /* let var */
+          if (vars > 0)
+            fx_tree(sc, cdaadr(body), car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, vars > 3);
+          var_name = caaadr(body);
+          for (s7_pointer p = cdr(let_body); is_pair(p); p = cdr(p))
+            {
+              s7_pointer clause = car(p);
+              s7_pointer result = cadr(clause);
+              fx_annotate_arg(sc, clause, args);
+              if ((is_pair(result)) && (car(result) == name))
+                {
+                  set_has_tc(cdr(clause));
+                  fx_annotate_args(sc, cdr(result), args);
+                }
+              else
+                if (is_fxable(sc, result))
+                  fx_annotate_arg(sc, cdr(clause), args);
+                else all_fxable = false;
+              fx_tree(sc, clause, var_name, NULL, NULL, false); /* just 1 let var */
+              if (vars > 0)
+                fx_tree_outer(sc, clause, car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, vars > 3);
+            }
+          if (all_fxable) set_optimized(body);
+          return(all_fxable);
+        }}
   return(false);
 }
 
@@ -75247,88 +75247,88 @@ static bool check_tc(s7_scheme *sc, s7_pointer name, int32_t vars, s7_pointer ar
     {
       s7_pointer orx = caddr(body);
       if (((car(orx) == sc->or_symbol) || (car(orx) == sc->and_symbol)) &&
-	  (car(body) != car(orx)) &&
-	  (is_fxable(sc, cadr(orx))))
-	{
-	  s7_int len = proper_list_length(orx);
-	  if ((len == 3) ||
-	      ((vars == 1) && (len == 4) && (tree_count(sc, name, orx, 0) == 1) && (is_fxable(sc, caddr(orx))))) /* the ...or|and_a_a_la case below? */
-	    {
-	      s7_pointer tc = (len == 3) ? caddr(orx) : cadddr(orx);
-	      if ((is_pair(tc)) &&
-		  (car(tc) == name) &&
-		  (is_pair(cdr(tc))) &&
-		  (is_fxable(sc, cadr(tc))) &&
-		  (((vars == 1) && (is_null(cddr(tc)))) ||
-		   ((vars == 2) && (is_pair(cddr(tc))) && (is_null(cdddr(tc))) && (is_safe_fxable(sc, caddr(tc)))) ||
-		   ((vars == 3) && (is_pair(cddr(tc))) && (is_pair(cdddr(tc))) && (is_null(cddddr(tc))) &&
-		    (is_safe_fxable(sc, caddr(tc))) && (is_safe_fxable(sc, cadddr(tc))))))
-		{
-		  if (vars == 1)
-		    set_safe_optimize_op(body, (car(body) == sc->and_symbol) ?
-					 ((len == 3) ? OP_TC_AND_A_OR_A_LA : OP_TC_AND_A_OR_A_A_LA) :
-					 ((len == 3) ? OP_TC_OR_A_AND_A_LA : OP_TC_OR_A_AND_A_A_LA));
-		  else
-		    if (vars == 2)
-		      set_safe_optimize_op(body, (car(body) == sc->and_symbol) ? OP_TC_AND_A_OR_A_LAA : OP_TC_OR_A_AND_A_LAA);
-		    else set_safe_optimize_op(body, (car(body) == sc->and_symbol) ? OP_TC_AND_A_OR_A_L3A : OP_TC_OR_A_AND_A_L3A);
-		  fx_annotate_arg(sc, cdr(body), args);
-		  fx_annotate_arg(sc, cdr(orx), args);
-		  if (len == 4) fx_annotate_arg(sc, cddr(orx), args);
-		  fx_annotate_args(sc, cdr(tc), args);
-		  /* if ((fx_proc(cdr(tc)) == fx_c_sca) && (fn_proc(cadr(tc)) == g_substring)) -> g_substring_uncopied); */
-		  /*   for that to be safe we need to be sure nothing in the body looks for null-termination (e.g.. string->number) */
-		  fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), (vars == 3) ? caddr(args) : NULL, false);
-		  return(true);
-		}}}
+          (car(body) != car(orx)) &&
+          (is_fxable(sc, cadr(orx))))
+        {
+          s7_int len = proper_list_length(orx);
+          if ((len == 3) ||
+              ((vars == 1) && (len == 4) && (tree_count(sc, name, orx, 0) == 1) && (is_fxable(sc, caddr(orx))))) /* the ...or|and_a_a_la case below? */
+            {
+              s7_pointer tc = (len == 3) ? caddr(orx) : cadddr(orx);
+              if ((is_pair(tc)) &&
+                  (car(tc) == name) &&
+                  (is_pair(cdr(tc))) &&
+                  (is_fxable(sc, cadr(tc))) &&
+                  (((vars == 1) && (is_null(cddr(tc)))) ||
+                   ((vars == 2) && (is_pair(cddr(tc))) && (is_null(cdddr(tc))) && (is_safe_fxable(sc, caddr(tc)))) ||
+                   ((vars == 3) && (is_pair(cddr(tc))) && (is_pair(cdddr(tc))) && (is_null(cddddr(tc))) &&
+                    (is_safe_fxable(sc, caddr(tc))) && (is_safe_fxable(sc, cadddr(tc))))))
+                {
+                  if (vars == 1)
+                    set_safe_optimize_op(body, (car(body) == sc->and_symbol) ?
+                                         ((len == 3) ? OP_TC_AND_A_OR_A_LA : OP_TC_AND_A_OR_A_A_LA) :
+                                         ((len == 3) ? OP_TC_OR_A_AND_A_LA : OP_TC_OR_A_AND_A_A_LA));
+                  else
+                    if (vars == 2)
+                      set_safe_optimize_op(body, (car(body) == sc->and_symbol) ? OP_TC_AND_A_OR_A_LAA : OP_TC_OR_A_AND_A_LAA);
+                    else set_safe_optimize_op(body, (car(body) == sc->and_symbol) ? OP_TC_AND_A_OR_A_L3A : OP_TC_OR_A_AND_A_L3A);
+                  fx_annotate_arg(sc, cdr(body), args);
+                  fx_annotate_arg(sc, cdr(orx), args);
+                  if (len == 4) fx_annotate_arg(sc, cddr(orx), args);
+                  fx_annotate_args(sc, cdr(tc), args);
+                  /* if ((fx_proc(cdr(tc)) == fx_c_sca) && (fn_proc(cadr(tc)) == g_substring)) -> g_substring_uncopied); */
+                  /*   for that to be safe we need to be sure nothing in the body looks for null-termination (e.g.. string->number) */
+                  fx_tree(sc, cdr(body), car(args), (vars == 1) ? NULL : cadr(args), (vars == 3) ? caddr(args) : NULL, false);
+                  return(true);
+                }}}
       else
-	{
-	  if ((vars == 1) &&
-	      (car(body) == sc->or_symbol) &&
-	      (is_fxable(sc, orx)) &&
-	      (is_pair(cdddr(body))) &&
-	      (is_pair(cadddr(body))))
-	    {
-	      s7_pointer and_p = cadddr(body);
-	      if ((is_proper_list_4(sc, and_p)) &&
-		  (car(and_p) == sc->and_symbol) &&
-		  (is_fxable(sc, cadr(and_p))) &&
-		  (is_fxable(sc, caddr(and_p))))
-		{
-		  s7_pointer la = cadddr(and_p);
-		  if ((is_proper_list_2(sc, la)) &&
-		      (car(la) == name) &&
-		      (is_fxable(sc, cadr(la))))
-		    {
-		      set_safe_optimize_op(body, OP_TC_OR_A_A_AND_A_A_LA);
-		      fx_annotate_arg(sc, cdr(body), args);
-		      fx_annotate_arg(sc, cddr(body), args);
-		      fx_annotate_arg(sc, cdr(and_p), args);
-		      fx_annotate_arg(sc, cddr(and_p), args);
-		      fx_annotate_args(sc, cdr(la), args);
-		      fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
-		      return(true);
-		    }}}
-	  else
- 	    {
- 	      if ((vars == 1) && (car(body) == sc->and_symbol) && (car(orx) == sc->if_symbol) &&
- 		  (is_proper_list_4(sc, orx)) && (is_fxable(sc, cadr(orx))) && (tree_count(sc, name, orx, 0) == 1))
- 		{
-		  bool z_first = ((is_pair(cadddr(orx))) && (car(cadddr(orx)) == name));
- 		  s7_pointer la = (z_first) ? cadddr(orx) : caddr(orx);
- 		  if ((car(la) == name) && (is_proper_list_2(sc, la)) && (is_fxable(sc, cadr(la))))
- 		    {
-		      bool z_fxable = true;
-		      s7_pointer z = (z_first) ? cddr(orx) : cdddr(orx);
- 		      set_optimize_op(body, (z_first) ? OP_TC_AND_A_IF_A_Z_LA : OP_TC_AND_A_IF_A_LA_Z);
- 		      fx_annotate_arg(sc, cdr(body), args);
- 		      fx_annotate_arg(sc, cdr(orx), args);
- 		      fx_annotate_arg(sc, cdr(la), args);
- 		      if (is_fxable(sc, car(z))) fx_annotate_arg(sc, z, args); else z_fxable = false;
- 		      fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
-		      if (z_fxable) set_optimized(body);
- 		      return(z_fxable);
-		    }}}}}
+        {
+          if ((vars == 1) &&
+              (car(body) == sc->or_symbol) &&
+              (is_fxable(sc, orx)) &&
+              (is_pair(cdddr(body))) &&
+              (is_pair(cadddr(body))))
+            {
+              s7_pointer and_p = cadddr(body);
+              if ((is_proper_list_4(sc, and_p)) &&
+                  (car(and_p) == sc->and_symbol) &&
+                  (is_fxable(sc, cadr(and_p))) &&
+                  (is_fxable(sc, caddr(and_p))))
+                {
+                  s7_pointer la = cadddr(and_p);
+                  if ((is_proper_list_2(sc, la)) &&
+                      (car(la) == name) &&
+                      (is_fxable(sc, cadr(la))))
+                    {
+                      set_safe_optimize_op(body, OP_TC_OR_A_A_AND_A_A_LA);
+                      fx_annotate_arg(sc, cdr(body), args);
+                      fx_annotate_arg(sc, cddr(body), args);
+                      fx_annotate_arg(sc, cdr(and_p), args);
+                      fx_annotate_arg(sc, cddr(and_p), args);
+                      fx_annotate_args(sc, cdr(la), args);
+                      fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
+                      return(true);
+                    }}}
+          else
+             {
+               if ((vars == 1) && (car(body) == sc->and_symbol) && (car(orx) == sc->if_symbol) &&
+                   (is_proper_list_4(sc, orx)) && (is_fxable(sc, cadr(orx))) && (tree_count(sc, name, orx, 0) == 1))
+                 {
+                  bool z_first = ((is_pair(cadddr(orx))) && (car(cadddr(orx)) == name));
+                   s7_pointer la = (z_first) ? cadddr(orx) : caddr(orx);
+                   if ((car(la) == name) && (is_proper_list_2(sc, la)) && (is_fxable(sc, cadr(la))))
+                     {
+                      bool z_fxable = true;
+                      s7_pointer z = (z_first) ? cddr(orx) : cdddr(orx);
+                       set_optimize_op(body, (z_first) ? OP_TC_AND_A_IF_A_Z_LA : OP_TC_AND_A_IF_A_LA_Z);
+                       fx_annotate_arg(sc, cdr(body), args);
+                       fx_annotate_arg(sc, cdr(orx), args);
+                       fx_annotate_arg(sc, cdr(la), args);
+                       if (is_fxable(sc, car(z))) fx_annotate_arg(sc, z, args); else z_fxable = false;
+                       fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
+                      if (z_fxable) set_optimized(body);
+                       return(z_fxable);
+                    }}}}}
 
   if ((vars == 3) &&
       (((car(body) == sc->or_symbol) && (is_proper_list_2(sc, cdr(body)))) ||
@@ -75337,26 +75337,26 @@ static bool check_tc(s7_scheme *sc, s7_pointer name, int32_t vars, s7_pointer ar
     {
       s7_pointer and_p = (car(body) == sc->or_symbol) ? caddr(body) : cadddr(body);
       if ((is_proper_list_4(sc, and_p)) &&
-	  (car(and_p) == sc->and_symbol) &&
-	  (is_fxable(sc, cadr(and_p))) &&
-	  (is_fxable(sc, caddr(and_p))))
-	{
-	  s7_pointer la = cadddr(and_p);
-	  if ((is_proper_list_4(sc, la)) &&
-	      (car(la) == name) &&
-	      (is_fxable(sc, cadr(la))) &&
-	      (is_safe_fxable(sc, caddr(la))) &&
-	      (is_safe_fxable(sc, cadddr(la))))
-	    {
-	      set_safe_optimize_op(body, OP_TC_OR_A_AND_A_A_L3A);
-	      set_opt3_pair(cdr(body), (car(body) == sc->or_symbol) ? cdaddr(body) : cdr(cadddr(body)));
-	      fx_annotate_arg(sc, cdr(body), args);
-	      fx_annotate_arg(sc, cdr(and_p), args);
-	      fx_annotate_arg(sc, cddr(and_p), args);
-	      fx_annotate_args(sc, cdr(la), args);
-	      fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
-	      return(true);
-	    }}}
+          (car(and_p) == sc->and_symbol) &&
+          (is_fxable(sc, cadr(and_p))) &&
+          (is_fxable(sc, caddr(and_p))))
+        {
+          s7_pointer la = cadddr(and_p);
+          if ((is_proper_list_4(sc, la)) &&
+              (car(la) == name) &&
+              (is_fxable(sc, cadr(la))) &&
+              (is_safe_fxable(sc, caddr(la))) &&
+              (is_safe_fxable(sc, cadddr(la))))
+            {
+              set_safe_optimize_op(body, OP_TC_OR_A_AND_A_A_L3A);
+              set_opt3_pair(cdr(body), (car(body) == sc->or_symbol) ? cdaddr(body) : cdr(cadddr(body)));
+              fx_annotate_arg(sc, cdr(body), args);
+              fx_annotate_arg(sc, cdr(and_p), args);
+              fx_annotate_arg(sc, cddr(and_p), args);
+              fx_annotate_args(sc, cdr(la), args);
+              fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
+              return(true);
+            }}}
 
   if (((vars >= 1) && (vars <= 3)) &&
       (car(body) == sc->if_symbol) &&
@@ -75364,205 +75364,205 @@ static bool check_tc(s7_scheme *sc, s7_pointer name, int32_t vars, s7_pointer ar
     {
       s7_pointer test = cadr(body);
       if (is_fxable(sc, test))
-	{
-	  s7_pointer true_p = caddr(body);
-	  s7_pointer false_p = cadddr(body);
-	  s7_int true_len = proper_list_length(true_p);
-	  s7_int false_len = proper_list_length(false_p);
-
-	  fx_annotate_arg(sc, cdr(body), args);
-
-	  if (vars == 1)
-	    {
-	      if ((false_len == 2) &&
-		  (car(false_p) == name) &&
-		  (is_fxable(sc, cadr(false_p))))
-		{
-		  set_optimize_op(body, OP_TC_IF_A_Z_LA);
-		  fx_annotate_arg(sc, cdr(false_p), args);  /* arg */
-		  set_opt1_pair(cdr(body), cddr(body));
-		  set_opt3_pair(cdr(body), cdar(cdddr(body)));
-		  if (!is_fxable(sc, true_p)) return(false);
-		  fx_annotate_arg(sc, cddr(body), args);    /* result */
-		  fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
-		  set_optimized(body); /* split here and elsewhere from set_optimize_op is deliberate */
-		  return(true);
-		}
-	      if ((true_len == 2) &&
-		  (car(true_p) == name) &&
-		  (is_fxable(sc, cadr(true_p))))
-		{
-		  set_optimize_op(body, OP_TC_IF_A_LA_Z);
-		  fx_annotate_arg(sc, cdr(true_p), args);   /* arg */
-		  set_opt1_pair(cdr(body), cdddr(body));
-		  set_opt3_pair(cdr(body), cdar(cddr(body)));
-		  if (!is_fxable(sc, false_p)) return(false);
-		  fx_annotate_arg(sc, cdddr(body), args);    /* result */
-		  fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
-		  set_optimized(body);
-		  return(true);
-		}}
-
-	  if (vars == 2)
-	    {
-	      if ((false_len == 3) &&
-		  (car(false_p) == name) &&
-		  (is_fxable(sc, cadr(false_p))) &&
-		  (is_safe_fxable(sc, caddr(false_p))))
-		{
-		  set_optimize_op(body, OP_TC_IF_A_Z_LAA);
-		  fx_annotate_args(sc, cdr(false_p), args);
-		  set_opt1_pair(cdr(body), cddr(body)); /* body == code in op, if_z */
-		  set_opt3_pair(cdr(body), cdar(cdddr(body))); /* la */
-		  if (!is_fxable(sc, true_p)) return(false);
-		  fx_annotate_arg(sc, cddr(body), args);
-		  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
-		  set_optimized(body);
-		  return(true);
-		}
-	      if ((true_len == 3) &&
-		  (car(true_p) == name) &&
-		  (is_fxable(sc, cadr(true_p))) &&
-		  (is_safe_fxable(sc, caddr(true_p))))
-		{
-		  set_optimize_op(body, OP_TC_IF_A_LAA_Z);
-		  fx_annotate_args(sc, cdr(true_p), args);
-		  set_opt1_pair(cdr(body), cdddr(body));
-		  set_opt3_pair(cdr(body), cdar(cddr(body)));
-		  if (!is_fxable(sc, false_p)) return(false);
-		  fx_annotate_arg(sc, cdddr(body), args);
-		  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
-		  set_optimized(body);
-		  return(true);
-		}}
-
-	  if (vars == 3)
-	    {
-	      if ((false_len == 4) &&
-		  (car(false_p) == name) &&
-		  (is_fxable(sc, cadr(false_p))) && (is_safe_fxable(sc, caddr(false_p))) && (is_safe_fxable(sc, cadddr(false_p))))
-		{
-		  set_optimize_op(body, OP_TC_IF_A_Z_L3A);
-		  fx_annotate_args(sc, cdr(false_p), args);
-		  set_opt1_pair(cdr(body), cddr(body));
-		  set_opt3_pair(cdr(body), cdar(cdddr(body)));
-		  if (!is_fxable(sc, true_p)) return(false);
-		  fx_annotate_arg(sc, cddr(body), args);
-		  fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
-		  set_optimized(body);
-		  return(true);
-		}
-	      if ((true_len == 4) &&
-		  (car(true_p) == name) &&
-		  (is_fxable(sc, cadr(true_p))) && (is_safe_fxable(sc, caddr(true_p))) && (is_safe_fxable(sc, cadddr(true_p))))
-		{
-		  set_optimize_op(body, OP_TC_IF_A_L3A_Z);
-		  fx_annotate_args(sc, cdr(true_p), args);
-		  set_opt1_pair(cdr(body), cdddr(body));
-		  set_opt3_pair(cdr(body), cdar(cddr(body)));
-		  if (!is_fxable(sc, false_p)) return(false);
-		  fx_annotate_arg(sc, cdddr(body), args);
-		  fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
-		  set_optimized(body);
-		  return(true);
-		}}
-
- 	  if ((false_len == 4) &&
- 	      (car(false_p) == sc->if_symbol))
- 	    {
- 	      s7_pointer in_test = cadr(false_p);
-	      s7_pointer in_true = caddr(false_p);
-	      s7_pointer in_false = cadddr(false_p);
- 	      if (is_fxable(sc, in_test))
-		{
-		  s7_pointer la = NULL, z;
-		  if ((is_pair(in_false)) &&
-		      (car(in_false) == name) &&
-		      (is_pair(cdr(in_false))) &&
-		      (is_fxable(sc, cadr(in_false))))
-		    {
-		      la = in_false;
-		      z = cddr(false_p);
-		    }
-		  else
-		    if ((is_pair(in_true)) &&
-			(car(in_true) == name) &&
-			(is_pair(cdr(in_true))) &&
-			(is_fxable(sc, cadr(in_true))))
-		      {
-			la = in_true;
-			z = cdddr(false_p);
-		      }
-		  if ((la) && ((vars == 3) || (!s7_tree_memq(sc, name, car(z)))))
-		    {
-		      if (((vars == 1) && (is_null(cddr(la)))) ||
-			  ((vars == 2) && (is_pair(cddr(la))) && (is_null(cdddr(la))) && (is_safe_fxable(sc, caddr(la)))) ||
-			  ((vars == 3) && (is_proper_list_4(sc, in_true)) && (car(in_true) == name) &&
-			   (is_proper_list_4(sc, in_false)) && (is_safe_fxable(sc, caddr(la))) && (is_safe_fxable(sc, cadddr(la))) &&
-			   (is_fxable(sc, cadr(in_true))) && (is_safe_fxable(sc, caddr(in_true))) && (is_safe_fxable(sc, cadddr(in_true)))))
-			{
-			  bool zs_fxable = true;
-			  if (vars == 1)
-			    set_optimize_op(body, (la == in_false) ? OP_TC_IF_A_Z_IF_A_Z_LA : OP_TC_IF_A_Z_IF_A_LA_Z);
-			  else
-			    if (vars == 2)
-			      set_optimize_op(body, (la == in_false) ? OP_TC_IF_A_Z_IF_A_Z_LAA : OP_TC_IF_A_Z_IF_A_LAA_Z);
-			    else set_optimize_op(body, OP_TC_IF_A_Z_IF_A_L3A_L3A);
-			  if (is_fxable(sc, true_p))             /* outer (z) result */
-			    fx_annotate_arg(sc, cddr(body), args);
-			  else zs_fxable = false;
-			  fx_annotate_arg(sc, cdr(false_p), args);  /* inner test */
-			  fx_annotate_args(sc, cdr(la), args);      /* la arg(s) */
-			  if (vars == 3)
-			    fx_annotate_args(sc, cdr(in_true), args);
-			  else
-			    if (is_fxable(sc, car(z)))
-			      fx_annotate_arg(sc, z, args);       /* inner (z) result */
-			    else zs_fxable = false;
-			  if ((has_fx(cddr(body))) && (has_fx(z)))
-			    fx_tree(sc, cdr(body), car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, false);
-			  if (zs_fxable) set_optimized(body);
-			  return(zs_fxable);
-			}}}}
-
-	  if ((vars == 2) &&
-	      (false_len == 3) &&
-	      (car(false_p) == sc->let_star_symbol))
-	    {
-	      s7_pointer letv = cadr(false_p), letb, v;
-
-	      if (!is_pair(letv)) return(false);
-	      letb = caddr(false_p);
-	      for (v = letv; is_pair(v); v = cdr(v))
-		if (!is_fxable(sc, cadar(v)))
-		  return(false);
-	      if ((is_proper_list_4(sc, letb)) &&
-		  (car(letb) == sc->if_symbol) &&
-		  (is_fxable(sc, cadr(letb))))
-		{
-		  s7_pointer laa = cadddr(letb);
-		  if ((car(laa) == name) &&
-		      (is_proper_list_3(sc, laa)) &&
-		      (is_fxable(sc, cadr(laa))) &&
-		      (is_safe_fxable(sc, caddr(laa))))
-		    {
-		      bool zs_fxable;
-		      set_safe_optimize_op(body, OP_TC_IF_A_Z_LET_IF_A_Z_LAA);
-		      fx_annotate_args(sc, cdr(laa), args);
-		      zs_fxable = is_fxable(sc, caddr(letb));
-		      fx_annotate_args(sc, cdr(letb), args);
-		      for (v = letv; is_pair(v); v = cdr(v))
-			fx_annotate_arg(sc, cdar(v), args);
-		      fx_tree(sc, cdar(letv), car(args), cadr(args), NULL, true); /* first var of let*, second var of let* can't be fx_treed */
-		      fx_tree(sc, cdr(body), car(args), cadr(args), NULL, true);  /* these are references to the outer let */
-		      fx_tree(sc, cdr(laa), caar(letv), (is_pair(cdr(letv))) ? caadr(letv) : NULL, NULL, true);
-		      fx_tree(sc, cdr(letb), caar(letv), (is_pair(cdr(letv))) ? caadr(letv) : NULL, NULL, true);
-		      fx_tree_outer(sc, cddr(letb), car(args), cadr(args), NULL, true);
-		      if (!is_fxable(sc, caddr(body)))
-			return(false);
-		      fx_annotate_arg(sc, cddr(body), args);
-		      return(zs_fxable);
-		    }}}}}
+        {
+          s7_pointer true_p = caddr(body);
+          s7_pointer false_p = cadddr(body);
+          s7_int true_len = proper_list_length(true_p);
+          s7_int false_len = proper_list_length(false_p);
+
+          fx_annotate_arg(sc, cdr(body), args);
+
+          if (vars == 1)
+            {
+              if ((false_len == 2) &&
+                  (car(false_p) == name) &&
+                  (is_fxable(sc, cadr(false_p))))
+                {
+                  set_optimize_op(body, OP_TC_IF_A_Z_LA);
+                  fx_annotate_arg(sc, cdr(false_p), args);  /* arg */
+                  set_opt1_pair(cdr(body), cddr(body));
+                  set_opt3_pair(cdr(body), cdar(cdddr(body)));
+                  if (!is_fxable(sc, true_p)) return(false);
+                  fx_annotate_arg(sc, cddr(body), args);    /* result */
+                  fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
+                  set_optimized(body); /* split here and elsewhere from set_optimize_op is deliberate */
+                  return(true);
+                }
+              if ((true_len == 2) &&
+                  (car(true_p) == name) &&
+                  (is_fxable(sc, cadr(true_p))))
+                {
+                  set_optimize_op(body, OP_TC_IF_A_LA_Z);
+                  fx_annotate_arg(sc, cdr(true_p), args);   /* arg */
+                  set_opt1_pair(cdr(body), cdddr(body));
+                  set_opt3_pair(cdr(body), cdar(cddr(body)));
+                  if (!is_fxable(sc, false_p)) return(false);
+                  fx_annotate_arg(sc, cdddr(body), args);    /* result */
+                  fx_tree(sc, cdr(body), car(args), NULL, NULL, false);
+                  set_optimized(body);
+                  return(true);
+                }}
+
+          if (vars == 2)
+            {
+              if ((false_len == 3) &&
+                  (car(false_p) == name) &&
+                  (is_fxable(sc, cadr(false_p))) &&
+                  (is_safe_fxable(sc, caddr(false_p))))
+                {
+                  set_optimize_op(body, OP_TC_IF_A_Z_LAA);
+                  fx_annotate_args(sc, cdr(false_p), args);
+                  set_opt1_pair(cdr(body), cddr(body)); /* body == code in op, if_z */
+                  set_opt3_pair(cdr(body), cdar(cdddr(body))); /* la */
+                  if (!is_fxable(sc, true_p)) return(false);
+                  fx_annotate_arg(sc, cddr(body), args);
+                  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
+                  set_optimized(body);
+                  return(true);
+                }
+              if ((true_len == 3) &&
+                  (car(true_p) == name) &&
+                  (is_fxable(sc, cadr(true_p))) &&
+                  (is_safe_fxable(sc, caddr(true_p))))
+                {
+                  set_optimize_op(body, OP_TC_IF_A_LAA_Z);
+                  fx_annotate_args(sc, cdr(true_p), args);
+                  set_opt1_pair(cdr(body), cdddr(body));
+                  set_opt3_pair(cdr(body), cdar(cddr(body)));
+                  if (!is_fxable(sc, false_p)) return(false);
+                  fx_annotate_arg(sc, cdddr(body), args);
+                  fx_tree(sc, cdr(body), car(args), cadr(args), NULL, false);
+                  set_optimized(body);
+                  return(true);
+                }}
+
+          if (vars == 3)
+            {
+              if ((false_len == 4) &&
+                  (car(false_p) == name) &&
+                  (is_fxable(sc, cadr(false_p))) && (is_safe_fxable(sc, caddr(false_p))) && (is_safe_fxable(sc, cadddr(false_p))))
+                {
+                  set_optimize_op(body, OP_TC_IF_A_Z_L3A);
+                  fx_annotate_args(sc, cdr(false_p), args);
+                  set_opt1_pair(cdr(body), cddr(body));
+                  set_opt3_pair(cdr(body), cdar(cdddr(body)));
+                  if (!is_fxable(sc, true_p)) return(false);
+                  fx_annotate_arg(sc, cddr(body), args);
+                  fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
+                  set_optimized(body);
+                  return(true);
+                }
+              if ((true_len == 4) &&
+                  (car(true_p) == name) &&
+                  (is_fxable(sc, cadr(true_p))) && (is_safe_fxable(sc, caddr(true_p))) && (is_safe_fxable(sc, cadddr(true_p))))
+                {
+                  set_optimize_op(body, OP_TC_IF_A_L3A_Z);
+                  fx_annotate_args(sc, cdr(true_p), args);
+                  set_opt1_pair(cdr(body), cdddr(body));
+                  set_opt3_pair(cdr(body), cdar(cddr(body)));
+                  if (!is_fxable(sc, false_p)) return(false);
+                  fx_annotate_arg(sc, cdddr(body), args);
+                  fx_tree(sc, cdr(body), car(args), cadr(args), caddr(args), false);
+                  set_optimized(body);
+                  return(true);
+                }}
+
+           if ((false_len == 4) &&
+               (car(false_p) == sc->if_symbol))
+             {
+               s7_pointer in_test = cadr(false_p);
+              s7_pointer in_true = caddr(false_p);
+              s7_pointer in_false = cadddr(false_p);
+               if (is_fxable(sc, in_test))
+                {
+                  s7_pointer la = NULL, z;
+                  if ((is_pair(in_false)) &&
+                      (car(in_false) == name) &&
+                      (is_pair(cdr(in_false))) &&
+                      (is_fxable(sc, cadr(in_false))))
+                    {
+                      la = in_false;
+                      z = cddr(false_p);
+                    }
+                  else
+                    if ((is_pair(in_true)) &&
+                        (car(in_true) == name) &&
+                        (is_pair(cdr(in_true))) &&
+                        (is_fxable(sc, cadr(in_true))))
+                      {
+                        la = in_true;
+                        z = cdddr(false_p);
+                      }
+                  if ((la) && ((vars == 3) || (!s7_tree_memq(sc, name, car(z)))))
+                    {
+                      if (((vars == 1) && (is_null(cddr(la)))) ||
+                          ((vars == 2) && (is_pair(cddr(la))) && (is_null(cdddr(la))) && (is_safe_fxable(sc, caddr(la)))) ||
+                          ((vars == 3) && (is_proper_list_4(sc, in_true)) && (car(in_true) == name) &&
+                           (is_proper_list_4(sc, in_false)) && (is_safe_fxable(sc, caddr(la))) && (is_safe_fxable(sc, cadddr(la))) &&
+                           (is_fxable(sc, cadr(in_true))) && (is_safe_fxable(sc, caddr(in_true))) && (is_safe_fxable(sc, cadddr(in_true)))))
+                        {
+                          bool zs_fxable = true;
+                          if (vars == 1)
+                            set_optimize_op(body, (la == in_false) ? OP_TC_IF_A_Z_IF_A_Z_LA : OP_TC_IF_A_Z_IF_A_LA_Z);
+                          else
+                            if (vars == 2)
+                              set_optimize_op(body, (la == in_false) ? OP_TC_IF_A_Z_IF_A_Z_LAA : OP_TC_IF_A_Z_IF_A_LAA_Z);
+                            else set_optimize_op(body, OP_TC_IF_A_Z_IF_A_L3A_L3A);
+                          if (is_fxable(sc, true_p))             /* outer (z) result */
+                            fx_annotate_arg(sc, cddr(body), args);
+                          else zs_fxable = false;
+                          fx_annotate_arg(sc, cdr(false_p), args);  /* inner test */
+                          fx_annotate_args(sc, cdr(la), args);      /* la arg(s) */
+                          if (vars == 3)
+                            fx_annotate_args(sc, cdr(in_true), args);
+                          else
+                            if (is_fxable(sc, car(z)))
+                              fx_annotate_arg(sc, z, args);       /* inner (z) result */
+                            else zs_fxable = false;
+                          if ((has_fx(cddr(body))) && (has_fx(z)))
+                            fx_tree(sc, cdr(body), car(args), (vars > 1) ? cadr(args) : NULL, (vars > 2) ? caddr(args) : NULL, false);
+                          if (zs_fxable) set_optimized(body);
+                          return(zs_fxable);
+                        }}}}
+
+          if ((vars == 2) &&
+              (false_len == 3) &&
+              (car(false_p) == sc->let_star_symbol))
+            {
+              s7_pointer letv = cadr(false_p), letb, v;
+
+              if (!is_pair(letv)) return(false);
+              letb = caddr(false_p);
+              for (v = letv; is_pair(v); v = cdr(v))
+                if (!is_fxable(sc, cadar(v)))
+                  return(false);
+              if ((is_proper_list_4(sc, letb)) &&
+                  (car(letb) == sc->if_symbol) &&
+                  (is_fxable(sc, cadr(letb))))
+                {
+                  s7_pointer laa = cadddr(letb);
+                  if ((car(laa) == name) &&
+                      (is_proper_list_3(sc, laa)) &&
+                      (is_fxable(sc, cadr(laa))) &&
+                      (is_safe_fxable(sc, caddr(laa))))
+                    {
+                      bool zs_fxable;
+                      set_safe_optimize_op(body, OP_TC_IF_A_Z_LET_IF_A_Z_LAA);
+                      fx_annotate_args(sc, cdr(laa), args);
+                      zs_fxable = is_fxable(sc, caddr(letb));
+                      fx_annotate_args(sc, cdr(letb), args);
+                      for (v = letv; is_pair(v); v = cdr(v))
+                        fx_annotate_arg(sc, cdar(v), args);
+                      fx_tree(sc, cdar(letv), car(args), cadr(args), NULL, true); /* first var of let*, second var of let* can't be fx_treed */
+                      fx_tree(sc, cdr(body), car(args), cadr(args), NULL, true);  /* these are references to the outer let */
+                      fx_tree(sc, cdr(laa), caar(letv), (is_pair(cdr(letv))) ? caadr(letv) : NULL, NULL, true);
+                      fx_tree(sc, cdr(letb), caar(letv), (is_pair(cdr(letv))) ? caadr(letv) : NULL, NULL, true);
+                      fx_tree_outer(sc, cddr(letb), car(args), cadr(args), NULL, true);
+                      if (!is_fxable(sc, caddr(body)))
+                        return(false);
+                      fx_annotate_arg(sc, cddr(body), args);
+                      return(zs_fxable);
+                    }}}}}
 
   /* let */
   if ((is_proper_list_3(sc, body)) &&
@@ -75597,10 +75597,10 @@ static void mark_fx_treeable(s7_scheme *sc, s7_pointer body)
   if (is_pair(body)) /* slightly faster than the other way of writing this */
     {
       if (is_pair(car(body)))
-	{
-	  set_is_fx_treeable(body);
-	  mark_fx_treeable(sc, car(body));
-	}
+        {
+          set_is_fx_treeable(body);
+          mark_fx_treeable(sc, car(body));
+        }
       mark_fx_treeable(sc, cdr(body));
     }
 }
@@ -75611,9 +75611,9 @@ static void optimize_lambda(s7_scheme *sc, bool unstarred_lambda, s7_pointer fun
   if (SHOW_EVAL_OPS) fprintf(stderr, "  %s[%d]: %s\n", __func__, __LINE__, display_truncated(body));
   if (len < 0)                /* (define (hi) 1 . 2) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~A: function body messed up, ~A", 31),
-			 (unstarred_lambda) ? sc->lambda_symbol : sc->lambda_star_symbol,
-			 sc->code));
+             set_elist_3(sc, wrap_string(sc, "~A: function body messed up, ~A", 31),
+                         (unstarred_lambda) ? sc->lambda_symbol : sc->lambda_star_symbol,
+                         sc->code));
   if (len > 0)  /* i.e. not circular */
     {
       body_t result;
@@ -75621,9 +75621,9 @@ static void optimize_lambda(s7_scheme *sc, bool unstarred_lambda, s7_pointer fun
 
       clear_symbol_list(sc);
       for (p = args; is_pair(p); p = cdr(p))
-	add_symbol_to_list(sc, (is_symbol(car(p))) ? car(p) : caar(p));
+        add_symbol_to_list(sc, (is_symbol(car(p))) ? car(p) : caar(p));
       if (!is_null(p))
-	add_symbol_to_list(sc, p);
+        add_symbol_to_list(sc, p);
       sc->got_tc = false;
       sc->not_tc = false;
       sc->got_rec = false;
@@ -75633,77 +75633,77 @@ static void optimize_lambda(s7_scheme *sc, bool unstarred_lambda, s7_pointer fun
 
       /* if the body is safe, we can optimize the calling sequence */
       if (!unstarred_lambda)
-	{
-	  bool happy = true;
-	  /* check default vals -- if none is an expression or symbol, set simple args */
-	  for (p = args; is_pair(p); p = cdr(p))
-	    {
-	      s7_pointer arg = car(p);
-	      if ((is_pair(arg)) &&                   /* has default value */
-		  (is_pair(cdr(arg))) &&              /*   is not a ridiculous improper list */
-		  ((is_symbol(cadr(arg))) ||          /*   if default value might involve eval in any way, it isn't simple */
-		   (is_unquoted_pair(cadr(arg)))))    /*   pair as default only ok if it is (quote ...) */
-		{
-		  happy = false;
-		  if ((result > UNSAFE_BODY) &&
-		      (tree_has_definers_or_binders(sc, cadr(arg)))) /* if the default has a definer, body is not safe (funclet is not stable) */
-		    result = UNSAFE_BODY;
-		  break;
-		}}
-	  if (happy)
-	    lambda_set_simple_defaults(body);
-	}
+        {
+          bool happy = true;
+          /* check default vals -- if none is an expression or symbol, set simple args */
+          for (p = args; is_pair(p); p = cdr(p))
+            {
+              s7_pointer arg = car(p);
+              if ((is_pair(arg)) &&                   /* has default value */
+                  (is_pair(cdr(arg))) &&              /*   is not a ridiculous improper list */
+                  ((is_symbol(cadr(arg))) ||          /*   if default value might involve eval in any way, it isn't simple */
+                   (is_unquoted_pair(cadr(arg)))))    /*   pair as default only ok if it is (quote ...) */
+                {
+                  happy = false;
+                  if ((result > UNSAFE_BODY) &&
+                      (tree_has_definers_or_binders(sc, cadr(arg)))) /* if the default has a definer, body is not safe (funclet is not stable) */
+                    result = UNSAFE_BODY;
+                  break;
+                }}
+          if (happy)
+            lambda_set_simple_defaults(body);
+        }
       if (result >= SAFE_BODY) /* not RECUR_BODY here (need new let for cons-r in s7test) */
-	{
-	  set_safe_closure_body(body);
-	  if (result == VERY_SAFE_BODY)
-	    set_very_safe_closure_body(body);
-	}
+        {
+          set_safe_closure_body(body);
+          if (result == VERY_SAFE_BODY)
+            set_very_safe_closure_body(body);
+        }
       if (is_symbol(func))
-	{
-	  lst = list_1(sc, add_symbol_to_list(sc, func));
-	  sc->temp1 = lst;
-	}
+        {
+          lst = list_1(sc, add_symbol_to_list(sc, func));
+          sc->temp1 = lst;
+        }
       else lst = sc->nil;
 
       if (optimize(sc, body, 1, cleared_args = collect_parameters(sc, args, lst)) == OPT_OOPS)
-	clear_all_optimizations(sc, body);
+        clear_all_optimizations(sc, body);
       else
-	if (result >= RECUR_BODY)
-	  {
-	    int32_t nvars;
-	    mark_fx_treeable(sc, body);
-
-	    for (nvars = 0, p = args; (is_pair(p)) && (!is_symbol_and_keyword(car(p))); nvars++, p = cdr(p));
-	    if ((is_null(p)) &&
-		(nvars > 0))
-	      {
-		fx_annotate_args(sc, body, cleared_args); /* almost useless -- we need a recursive traversal here but that collides with check_if et al */
-		fx_tree(sc, body, /* this usually costs more than it saves! */
-			(is_pair(car(args))) ? caar(args) : car(args),
-			(nvars > 1) ? ((is_pair(cadr(args))) ? caadr(args) : cadr(args)) : NULL,
-			(nvars > 2) ? ((is_pair(caddr(args))) ? caaddr(args) : caddr(args)) : NULL,
-			nvars > 3);
-	      }
-	    if (((unstarred_lambda) || ((is_null(p)) && (nvars == sc->rec_tc_args))) &&
-		(is_null(cdr(body))))
-	      { /* (if <a> #t|#f...) happens only rarely */
-		if (sc->got_tc)
-		  {
-		    if (check_tc(sc, func, nvars, args, car(body)))
-		      set_safe_closure_body(body);	      /* (very_)safe_closure set above if > RECUR_BODY */
-		    /* if not check_tc, car(body) is either not a tc op or it is not optimized so that is_fxable will return false */
-		  }
-		if ((sc->got_rec) &&
-		    (!is_tc_op(optimize_op(car(body)))) &&
-		    (check_recur(sc, func, nvars, args, car(body))))
-		  set_safe_closure_body(body);
-	      }}
+        if (result >= RECUR_BODY)
+          {
+            int32_t nvars;
+            mark_fx_treeable(sc, body);
+
+            for (nvars = 0, p = args; (is_pair(p)) && (!is_symbol_and_keyword(car(p))); nvars++, p = cdr(p));
+            if ((is_null(p)) &&
+                (nvars > 0))
+              {
+                fx_annotate_args(sc, body, cleared_args); /* almost useless -- we need a recursive traversal here but that collides with check_if et al */
+                fx_tree(sc, body, /* this usually costs more than it saves! */
+                        (is_pair(car(args))) ? caar(args) : car(args),
+                        (nvars > 1) ? ((is_pair(cadr(args))) ? caadr(args) : cadr(args)) : NULL,
+                        (nvars > 2) ? ((is_pair(caddr(args))) ? caaddr(args) : caddr(args)) : NULL,
+                        nvars > 3);
+              }
+            if (((unstarred_lambda) || ((is_null(p)) && (nvars == sc->rec_tc_args))) &&
+                (is_null(cdr(body))))
+              { /* (if <a> #t|#f...) happens only rarely */
+                if (sc->got_tc)
+                  {
+                    if (check_tc(sc, func, nvars, args, car(body)))
+                      set_safe_closure_body(body);              /* (very_)safe_closure set above if > RECUR_BODY */
+                    /* if not check_tc, car(body) is either not a tc op or it is not optimized so that is_fxable will return false */
+                  }
+                if ((sc->got_rec) &&
+                    (!is_tc_op(optimize_op(car(body)))) &&
+                    (check_recur(sc, func, nvars, args, car(body))))
+                  set_safe_closure_body(body);
+              }}
       if (is_symbol(func))
-	{
-	  sc->temp1 = sc->unused;
-	  free_cell(sc, lst);
-	}
+        {
+          sc->temp1 = sc->unused;
+          free_cell(sc, lst);
+        }
       sc->got_tc = false;
       sc->not_tc = false;
       sc->got_rec = false;
@@ -75749,9 +75749,9 @@ static int32_t check_lambda(s7_scheme *sc, s7_pointer form, bool opt)
     optimize_lambda(sc, true, sc->unused, car(code), body);
   else
     if (optimize(sc, body, 0,
-		 /* ((sc->op_stack_now > sc->op_stack) && (is_c_function((*(sc->op_stack_now - 1)))) && (is_scope_safe((*(sc->op_stack_now - 1))))) ? 1 : 0, */
-		 /* this works except when someone resets outlet(curlet) after defining a local function! */
-		 collect_parameters(sc, car(code), sc->nil)) == OPT_OOPS)
+                 /* ((sc->op_stack_now > sc->op_stack) && (is_c_function((*(sc->op_stack_now - 1)))) && (is_scope_safe((*(sc->op_stack_now - 1))))) ? 1 : 0, */
+                 /* this works except when someone resets outlet(curlet) after defining a local function! */
+                 collect_parameters(sc, car(code), sc->nil)) == OPT_OOPS)
       clear_all_optimizations(sc, body);
   pair_set_syntax_op(form, OP_LAMBDA_UNCHECKED);
   if (arity < -1) arity++; /* confusing! at least 0 = (), but (lambda arg...) has same "arity" here as (lambda (a . b)...)? */
@@ -75789,7 +75789,7 @@ static void check_lambda_star(s7_scheme *sc)
       (stack_top_op(sc) != OP_DEFINE1))
     {
       if (optimize(sc, cdr(code), 0, collect_parameters(sc, car(code), sc->nil)) == OPT_OOPS)
-	clear_all_optimizations(sc, cdr(code));
+        clear_all_optimizations(sc, cdr(code));
     }
   else optimize_lambda(sc, false, sc->unused, car(code), cdr(code));
 
@@ -75802,7 +75802,7 @@ static void check_lambda_star(s7_scheme *sc)
 static inline bool is_undefined_feed_to(s7_scheme *sc, const s7_pointer sym)
 {
   return((sym == sc->feed_to_symbol) &&
-	 ((symbol_ctr(sc->feed_to_symbol) == 0) || (s7_symbol_value(sc, sc->feed_to_symbol) == sc->undefined)));
+         ((symbol_ctr(sc->feed_to_symbol) == 0) || (s7_symbol_value(sc, sc->feed_to_symbol) == sc->undefined)));
 }
 
 static bool is_all_fxable(s7_scheme *sc, s7_pointer x)
@@ -75832,85 +75832,85 @@ static s7_pointer check_case(s7_scheme *sc)
     {
       s7_pointer y, car_x;
       if (!is_pair(car(x)))
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "case clause ~S messed up in ~A", sc->print_length),
-			     x, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "case clause ~S messed up in ~A", sc->print_length),
+                             x, object_to_string_truncated(sc, form)));
       car_x = car(x);
 
       if (!is_list(cdr(car_x)))                                      /* (case 1 ((1))) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "case clause result ~S is messed up in ~A", sc->print_length),
-			     car_x, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "case clause result ~S is messed up in ~A", sc->print_length),
+                             car_x, object_to_string_truncated(sc, form)));
       if ((bodies_simple) &&
-	  ((is_null(cdr(car_x))) || (!is_null(cddr(car_x)))))
-	bodies_simple = false;
+          ((is_null(cdr(car_x))) || (!is_null(cddr(car_x)))))
+        bodies_simple = false;
 
       use_fx = ((use_fx) && (is_pair(cdr(car_x))) && (is_all_fxable(sc, cdr(car_x))));
       y = car(car_x);
       if (!is_pair(y))
-	{
-	  if ((y != sc->else_symbol) &&                              /* (case 1 (2 1)) */
-	      ((!is_symbol(y)) ||
-	       (s7_symbol_value(sc, y) != sc->else_symbol)))         /* "proper list" below because: (case 1 (() 2) ... */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_4(sc, wrap_string(sc, "case clause key-list ~S in ~S is not a proper list or 'else', in ~A", 67),
-				 y, car_x, object_to_string_truncated(sc, form)));
-	  has_else = true;
-	  if (is_not_null(cdr(x)))                                  /* (case 1 (else 1) ((2) 1)) */
-	    syntax_error_nr(sc, "case 'else' clause is not the last clause: ~S", 45, x);
-	  if (!is_null(cdr(car_x)))                                  /* else (else) so return selector */
-	    {
-	      if (is_pair(cddr(car_x)))
-		{
-		  set_opt3_any(code, cdr(car_x));
-		  bodies_simple = false;
-		}
-	      else
-		{
-		  set_opt3_any(code, ((bodies_simple) && (keys_single)) ? cadr(car_x) : cdr(car_x));
-		  set_opt1_clause(x, cadr(car_x));
-		}}}
+        {
+          if ((y != sc->else_symbol) &&                              /* (case 1 (2 1)) */
+              ((!is_symbol(y)) ||
+               (s7_symbol_value(sc, y) != sc->else_symbol)))         /* "proper list" below because: (case 1 (() 2) ... */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_4(sc, wrap_string(sc, "case clause key-list ~S in ~S is not a proper list or 'else', in ~A", 67),
+                                 y, car_x, object_to_string_truncated(sc, form)));
+          has_else = true;
+          if (is_not_null(cdr(x)))                                  /* (case 1 (else 1) ((2) 1)) */
+            syntax_error_nr(sc, "case 'else' clause is not the last clause: ~S", 45, x);
+          if (!is_null(cdr(car_x)))                                  /* else (else) so return selector */
+            {
+              if (is_pair(cddr(car_x)))
+                {
+                  set_opt3_any(code, cdr(car_x));
+                  bodies_simple = false;
+                }
+              else
+                {
+                  set_opt3_any(code, ((bodies_simple) && (keys_single)) ? cadr(car_x) : cdr(car_x));
+                  set_opt1_clause(x, cadr(car_x));
+                }}}
       else
-	{
-	  if (!is_simple(car(y))) keys_simple = false;
-	  if (!is_null(cdr(y)))   keys_single = false;
-	  if (key_type == T_FREE)
-	    key_type = type(car(y));
-	  else
-	    if (key_type != type(car(y)))
-	      key_type = NUM_TYPES;
-	  if (key_type == T_SYMBOL) set_case_key(car(y));
-
-	  for (y = cdr(y); is_pair(y); y = cdr(y))
-	    {
-	      if (!is_simple(car(y)))
-		keys_simple = false;
-	      if (key_type != type(car(y)))
-		key_type = NUM_TYPES;
-	      if (key_type == T_SYMBOL) set_case_key(car(y));
-	    }
-	  if (!is_null(y))                                        /* (case () ((1 . 2) . hi) . hi) */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_3(sc, wrap_string(sc, "case key list ~S is improper, in ~A", 35),
-				 car_x, object_to_string_truncated(sc, form)));
-	}
+        {
+          if (!is_simple(car(y))) keys_simple = false;
+          if (!is_null(cdr(y)))   keys_single = false;
+          if (key_type == T_FREE)
+            key_type = type(car(y));
+          else
+            if (key_type != type(car(y)))
+              key_type = NUM_TYPES;
+          if (key_type == T_SYMBOL) set_case_key(car(y));
+
+          for (y = cdr(y); is_pair(y); y = cdr(y))
+            {
+              if (!is_simple(car(y)))
+                keys_simple = false;
+              if (key_type != type(car(y)))
+                key_type = NUM_TYPES;
+              if (key_type == T_SYMBOL) set_case_key(car(y));
+            }
+          if (!is_null(y))                                        /* (case () ((1 . 2) . hi) . hi) */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_3(sc, wrap_string(sc, "case key list ~S is improper, in ~A", 35),
+                                 car_x, object_to_string_truncated(sc, form)));
+        }
       y = car_x;
       if (!s7_is_proper_list(sc, cdr(y)))                         /* (case 2 ((1 2) 1 . 2)) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "case: stray dot? ~S in ~A", 25),
-			     y, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "case: stray dot? ~S in ~A", 25),
+                             y, object_to_string_truncated(sc, form)));
       if ((is_pair(cdr(y))) && (is_undefined_feed_to(sc, cadr(y))))
-	{
-	  has_feed_to = true;
-	  if (!is_pair(cddr(y)))                                  /* (case 1 (else =>)) */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_3(sc, wrap_string(sc, "case: '=>' target missing: ~S in ~A", 35),
-				 y, object_to_string_truncated(sc, form)));
-	  if (is_pair(cdddr(y)))                                  /* (case 1 (else => + - *)) */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_3(sc, wrap_string(sc, "case: '=>' has too many targets: ~S in ~A", 41),
-				 y, object_to_string_truncated(sc, form)));
-	}}
+        {
+          has_feed_to = true;
+          if (!is_pair(cddr(y)))                                  /* (case 1 (else =>)) */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_3(sc, wrap_string(sc, "case: '=>' target missing: ~S in ~A", 35),
+                                 y, object_to_string_truncated(sc, form)));
+          if (is_pair(cdddr(y)))                                  /* (case 1 (else => + - *)) */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_3(sc, wrap_string(sc, "case: '=>' has too many targets: ~S in ~A", 41),
+                                 y, object_to_string_truncated(sc, form)));
+        }}
   if (is_not_null(x))                                             /* (case x ((1 2)) . 1) */
     syntax_error_nr(sc, "case: stray dot? ~S", 19, form);
 
@@ -75918,21 +75918,21 @@ static s7_pointer check_case(s7_scheme *sc)
       (bodies_simple))
     {
       for (x = cdr(code); is_not_null(x); x = cdr(x))
-	{
-	  set_opt2_any(x, caar(x));
-	  if (is_pair(opt2_any(x)))
-	    {
-	      set_opt2_any(x, car(opt2_any(x)));
-	      if (is_pair(cdar(x)))
-		set_opt1_clause(x, cadar(x));
-	    }}}
+        {
+          set_opt2_any(x, caar(x));
+          if (is_pair(opt2_any(x)))
+            {
+              set_opt2_any(x, car(opt2_any(x)));
+              if (is_pair(cdar(x)))
+                set_opt1_clause(x, cadar(x));
+            }}}
   else
     for (x = cdr(code); is_not_null(x); x = cdr(x))
       {
-	set_opt2_any(x, caar(x));
-	if ((is_pair(opt2_any(x))) &&
-	    (is_pair(cdar(x))))
-	  set_opt1_clause(x, cadar(x));
+        set_opt2_any(x, caar(x));
+        if ((is_pair(opt2_any(x))) &&
+            (is_pair(cdar(x))))
+          set_opt1_clause(x, cadar(x));
       }
   if (key_type == T_INTEGER)
     set_has_integer_keys(form);
@@ -75944,62 +75944,62 @@ static s7_pointer check_case(s7_scheme *sc)
       (!keys_single))
     {
       if (!keys_simple)  /* x_g_g */
-	{
-	  if (is_fxable(sc, car(code)))
-	    {
-	      pair_set_syntax_op(form, OP_CASE_A_G_G);
-	      set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
-	      if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
-	    }
-	  else pair_set_syntax_op(form, OP_CASE_P_G_G);
-	}
+        {
+          if (is_fxable(sc, car(code)))
+            {
+              pair_set_syntax_op(form, OP_CASE_A_G_G);
+              set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
+              if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
+            }
+          else pair_set_syntax_op(form, OP_CASE_P_G_G);
+        }
       else             /* x_e_g */
-	{
-	  if (!has_else) set_opt3_any(code, sc->unused); /* affects all that goto CASE_E_G */
-	  if (is_fxable(sc, car(code)))
-	    {
-	      pair_set_syntax_op(form, (key_type == T_SYMBOL) ? OP_CASE_A_S_G : OP_CASE_A_E_G);
-	      set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
-	      if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
-	    }
-	  else pair_set_syntax_op(form, OP_CASE_P_E_G);
-	}}
+        {
+          if (!has_else) set_opt3_any(code, sc->unused); /* affects all that goto CASE_E_G */
+          if (is_fxable(sc, car(code)))
+            {
+              pair_set_syntax_op(form, (key_type == T_SYMBOL) ? OP_CASE_A_S_G : OP_CASE_A_E_G);
+              set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
+              if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
+            }
+          else pair_set_syntax_op(form, OP_CASE_P_E_G);
+        }}
   else                 /* x_x_s */
     if (!keys_simple)  /* x_g|i_s */
       {
-	if (is_fxable(sc, car(code)))
-	  {
-	    pair_set_syntax_op(form, ((!WITH_GMP) && (key_type == T_INTEGER)) ? OP_CASE_A_I_S : OP_CASE_A_G_S);
-	    set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
-	    if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
-	  }
-	else pair_set_syntax_op(form, ((!WITH_GMP) && (key_type == T_INTEGER)) ? OP_CASE_P_I_S : OP_CASE_P_G_S);
+        if (is_fxable(sc, car(code)))
+          {
+            pair_set_syntax_op(form, ((!WITH_GMP) && (key_type == T_INTEGER)) ? OP_CASE_A_I_S : OP_CASE_A_G_S);
+            set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
+            if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
+          }
+        else pair_set_syntax_op(form, ((!WITH_GMP) && (key_type == T_INTEGER)) ? OP_CASE_P_I_S : OP_CASE_P_G_S);
       }
     else              /* x_e_s */
       if (is_fxable(sc, car(code)))
-	{
-	  pair_set_syntax_op(form, OP_CASE_A_E_S);
-	  set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
-	  if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
-	}
+        {
+          pair_set_syntax_op(form, OP_CASE_A_E_S);
+          set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
+          if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree_in(sc, code);
+        }
       else pair_set_syntax_op(form, OP_CASE_P_E_S);
 
   if ((use_fx) && (has_else) && (!has_feed_to))
     {
       opcode_t op = optimize_op(form);
       if ((op == OP_CASE_A_E_S) || (op == OP_CASE_A_G_S) || (op == OP_CASE_A_S_G) || ((!WITH_GMP) && (op == OP_CASE_A_I_S)))
-	{
-	  pair_set_syntax_op(form,
-			     (op == OP_CASE_A_I_S) ? OP_CASE_A_I_S_A :
-			       ((op == OP_CASE_A_E_S) ? OP_CASE_A_E_S_A :
-				 ((op == OP_CASE_A_S_G) ? OP_CASE_A_S_G_A : OP_CASE_A_G_S_A)));
-	  for (x = cdr(code); is_pair(x); x = cdr(x))
-	    {
-	      s7_pointer clause = cdar(x);
-	      fx_annotate_args(sc, clause, sc->curlet);
-	      if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, clause);
-	      if (is_null(cdr(x))) set_opt3_any(code, clause);
-	    }}}
+        {
+          pair_set_syntax_op(form,
+                             (op == OP_CASE_A_I_S) ? OP_CASE_A_I_S_A :
+                               ((op == OP_CASE_A_E_S) ? OP_CASE_A_E_S_A :
+                                 ((op == OP_CASE_A_S_G) ? OP_CASE_A_S_G_A : OP_CASE_A_G_S_A)));
+          for (x = cdr(code); is_pair(x); x = cdr(x))
+            {
+              s7_pointer clause = cdar(x);
+              fx_annotate_args(sc, clause, sc->curlet);
+              if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, clause);
+              if (is_null(cdr(x))) set_opt3_any(code, clause);
+            }}}
   carc = cadr(form);
   if (!is_pair(carc))
     {
@@ -76019,14 +76019,14 @@ static bool op_case_i_s(s7_scheme *sc)
   if (else_clause != sc->unspecified)
     {
       if (is_t_integer(selector))
-	{
-	  s7_int val = integer(selector);
-	  for (s7_pointer x = cddr(sc->code); is_pair(cdr(x)); x = cdr(x))
-	    if (integer(opt2_any(x)) == val)
-	      {
-		sc->code = opt1_clause(x);
-		return(false);
-	      }}
+        {
+          s7_int val = integer(selector);
+          for (s7_pointer x = cddr(sc->code); is_pair(cdr(x)); x = cdr(x))
+            if (integer(opt2_any(x)) == val)
+              {
+                sc->code = opt1_clause(x);
+                return(false);
+              }}
       sc->code = else_clause;
       return(false);
     }
@@ -76034,11 +76034,11 @@ static bool op_case_i_s(s7_scheme *sc)
     {
       s7_int val = integer(selector);
       for (s7_pointer x = cddr(sc->code); is_pair(x); x = cdr(x))
-	if (integer(opt2_any(x)) == val)
-	  {
-	    sc->code = opt1_clause(x);
-	    return(false);
-	  }}
+        if (integer(opt2_any(x)) == val)
+          {
+            sc->code = opt1_clause(x);
+            return(false);
+          }}
   sc->value = sc->unspecified;
   return(true);
 }
@@ -76050,8 +76050,8 @@ static inline s7_pointer fx_case_a_i_s_a(s7_scheme *sc, s7_pointer code) /* inli
     {
       s7_int val = integer(selector);
       for (s7_pointer x = cddr(sc->code); is_pair(cdr(x)); x = cdr(x))
-	if (integer(opt2_any(x)) == val)
-	  return(fx_call(sc, cdar(x)));
+        if (integer(opt2_any(x)) == val)
+          return(fx_call(sc, cdar(x)));
     }
   return(fx_call(sc, opt3_any(cdr(code))));
 }
@@ -76063,16 +76063,16 @@ static bool op_case_e_g_1(s7_scheme *sc, const s7_pointer selector, bool ok)
   if (ok)
     {
       for (x = cddr(sc->code); is_pair(x); x = cdr(x))
-	{
-	  s7_pointer y = opt2_any(x);
-	  if (!is_pair(y)) /* i.e. else? */
-	    goto ELSE_CASE_1;
-	  do {
-	    if (car(y) == selector)
-	      goto ELSE_CASE_1;
-	    y = cdr(y);
-	  } while (is_pair(y));
-	}
+        {
+          s7_pointer y = opt2_any(x);
+          if (!is_pair(y)) /* i.e. else? */
+            goto ELSE_CASE_1;
+          do {
+            if (car(y) == selector)
+              goto ELSE_CASE_1;
+            y = cdr(y);
+          } while (is_pair(y));
+        }
       sc->value = sc->unspecified;
       pop_stack(sc);
       return(true);
@@ -76127,14 +76127,14 @@ static s7_pointer fx_case_a_s_g_a(s7_scheme *sc, s7_pointer code)
   if (is_case_key(selector))
     for (s7_pointer x = cddr(sc->code); is_pair(x); x = cdr(x))
       {
-	s7_pointer y = opt2_any(x);
-	if (!is_pair(y)) /* i.e. else? */
-	  return(fx_call_all(sc, cdar(x))); /* else clause */
-	do {
-	  if (car(y) == selector)
-	    return(fx_call_all(sc, cdar(x)));
-	  y = cdr(y);
-	} while (is_pair(y));
+        s7_pointer y = opt2_any(x);
+        if (!is_pair(y)) /* i.e. else? */
+          return(fx_call_all(sc, cdar(x))); /* else clause */
+        do {
+          if (car(y) == selector)
+            return(fx_call_all(sc, cdar(x)));
+          y = cdr(y);
+        } while (is_pair(y));
       }
   return(fx_call_all(sc, opt3_any(cdr(code)))); /* selector is not a case-key */
 }
@@ -76151,31 +76151,31 @@ static bool op_case_g_g(s7_scheme *sc)
       s7_int selector;
       sc->code = cddr(sc->code);
       if (is_t_integer(sc->value))
-	selector = integer(sc->value);
+        selector = integer(sc->value);
       else
-	{
+        {
 #if WITH_GMP
-	  if ((is_t_big_integer(sc->value)) && (mpz_fits_slong_p(big_integer(sc->value))))
-	    selector = mpz_get_si(big_integer(sc->value));
-	  else
-#endif
-	    {
-	      for (x = sc->code; is_pair(x); x = cdr(x))
-		if (!is_pair(caar(x)))
-		  goto ELSE_CASE;
-	      sc->value = sc->unspecified;
-	      pop_stack(sc);
-	      return(true);
-	    }}
+          if ((is_t_big_integer(sc->value)) && (mpz_fits_slong_p(big_integer(sc->value))))
+            selector = mpz_get_si(big_integer(sc->value));
+          else
+#endif
+            {
+              for (x = sc->code; is_pair(x); x = cdr(x))
+                if (!is_pair(caar(x)))
+                  goto ELSE_CASE;
+              sc->value = sc->unspecified;
+              pop_stack(sc);
+              return(true);
+            }}
       for (x = sc->code; is_pair(x); x = cdr(x))
-	{
-	  s7_pointer y = caar(x);
-	  if (!is_pair(y))
-	    goto ELSE_CASE;
-	  for (; is_pair(y); y = cdr(y))
-	    if (integer(car(y)) == selector)
-	      goto ELSE_CASE;
-	}
+        {
+          s7_pointer y = caar(x);
+          if (!is_pair(y))
+            goto ELSE_CASE;
+          for (; is_pair(y); y = cdr(y))
+            if (integer(car(y)) == selector)
+              goto ELSE_CASE;
+        }
       sc->value = sc->unspecified;
       pop_stack(sc);
       return(true);
@@ -76184,16 +76184,16 @@ static bool op_case_g_g(s7_scheme *sc)
   if (is_simple(sc->value))
     {
       for (x = sc->code; is_pair(x); x = cdr(x))
-	{
-	  s7_pointer y = caar(x);
-	  if (!is_pair(y))
-	    goto ELSE_CASE;
-	  do {
-	    if (car(y) == sc->value)
-	      goto ELSE_CASE;
-	    y = cdr(y);
-	  } while (is_pair(y));
-	}
+        {
+          s7_pointer y = caar(x);
+          if (!is_pair(y))
+            goto ELSE_CASE;
+          do {
+            if (car(y) == sc->value)
+              goto ELSE_CASE;
+            y = cdr(y);
+          } while (is_pair(y));
+        }
       sc->value = sc->unspecified;
       pop_stack(sc);
       return(true);
@@ -76202,10 +76202,10 @@ static bool op_case_g_g(s7_scheme *sc)
     {
       s7_pointer y = caar(x);
       if (!is_pair(y))
-	goto ELSE_CASE;
+        goto ELSE_CASE;
       for (; is_pair(y); y = cdr(y))
-	if (s7_is_eqv(sc, car(y), sc->value))
-	  goto ELSE_CASE;
+        if (s7_is_eqv(sc, car(y), sc->value))
+          goto ELSE_CASE;
     }
   sc->value = sc->unspecified; /* this was sc->nil but the spec says case value is unspecified if no clauses match */
   pop_stack(sc);
@@ -76238,10 +76238,10 @@ static void op_case_e_s(s7_scheme *sc)
   if (is_simple(selector))
     for (s7_pointer x = cddr(sc->code); is_pair(x); x = cdr(x))
       if (opt2_any(x) == selector)
-	{
-	  sc->code = opt1_clause(x);
-	  return;
-	}
+        {
+          sc->code = opt1_clause(x);
+          return;
+        }
   sc->code = opt3_any(cdr(sc->code));
 }
 
@@ -76251,7 +76251,7 @@ static s7_pointer fx_case_a_e_s_a(s7_scheme *sc, s7_pointer code)
   if (is_simple(selector))
     for (s7_pointer x = cddr(code); is_pair(x); x = cdr(x))
       if (opt2_any(x) == selector)
-	return(fx_call(sc, cdar(x)));
+        return(fx_call(sc, cdar(x)));
   return(fx_call(sc, opt3_any(cdr(code))));
 }
 
@@ -76261,8 +76261,8 @@ static void op_case_g_s(s7_scheme *sc)
   for (s7_pointer x = cddr(sc->code); is_pair(x); x = cdr(x))
     if (s7_is_eqv(sc, opt2_any(x), selector))
       {
-	sc->code = opt1_clause(x);
-	return;
+        sc->code = opt1_clause(x);
+        return;
       }
   sc->code = opt3_any(cdr(sc->code));
 }
@@ -76290,8 +76290,8 @@ static void check_let_a_body(s7_scheme *sc, s7_pointer form)
   else
     if (is_pair(cadr(code)))
       {
-	pair_set_syntax_op(form, OP_LET_A_P_OLD);
-	if (is_fx_treeable(cdaar(code))) fx_tree(sc, cdr(code), caaar(code), NULL, NULL, false);
+        pair_set_syntax_op(form, OP_LET_A_P_OLD);
+        if (is_fx_treeable(cdaar(code))) fx_tree(sc, cdr(code), caaar(code), NULL, NULL, false);
       }
 }
 
@@ -76305,50 +76305,50 @@ static void check_let_one_var(s7_scheme *sc, s7_pointer form, s7_pointer start)
       set_opt2_sym(cdr(code), car(binding)); /* these don't collide -- cdr(code) and code */
       set_opt2_pair(code, cadr(binding));
       if (is_optimized(cadr(binding)))
-	{
-	  if ((optimize_op(cadr(binding)) == HOP_SAFE_C_SS) &&
-	      (fn_proc(cadr(binding)) == g_assq))
-	    {
-	      set_opt2_sym(code, cadadr(binding));
-	      pair_set_syntax_op(form, OP_LET_opaSSq_OLD);
-	      set_opt3_sym(cdr(code), caddadr(binding));
-	      set_opt1_sym(code, car(binding));
-	    }
-	  else
-	    if (is_fxable(sc, cadr(binding)))
-	      {
-		set_opt2_pair(code, binding);
-		pair_set_syntax_op(form, OP_LET_A_OLD);
-		fx_annotate_arg(sc, cdr(binding), sc->curlet);
-		if (is_null(cddr(code)))
-		  check_let_a_body(sc, form);
-		else
-		  {
-		    s7_pointer p;
-		    for (p = cdr(code); is_pair(p); p = cdr(p))
-		      if (!is_fxable(sc, car(p)))
-			break;
-		    if (is_null(p))
-		      {
-			pair_set_syntax_op(form, OP_LET_A_NA_OLD);
-			fx_annotate_args(sc, cdr(code), set_plist_1(sc, car(binding)));
-			fx_tree(sc, cdr(code), car(binding), NULL, NULL, false);
-			return;
-		      }
-		    if (is_fx_treeable(cdr(code))) fx_tree(sc, cdr(code), car(binding), NULL, NULL, false);
-		  }}}}
+        {
+          if ((optimize_op(cadr(binding)) == HOP_SAFE_C_SS) &&
+              (fn_proc(cadr(binding)) == g_assq))
+            {
+              set_opt2_sym(code, cadadr(binding));
+              pair_set_syntax_op(form, OP_LET_opaSSq_OLD);
+              set_opt3_sym(cdr(code), caddadr(binding));
+              set_opt1_sym(code, car(binding));
+            }
+          else
+            if (is_fxable(sc, cadr(binding)))
+              {
+                set_opt2_pair(code, binding);
+                pair_set_syntax_op(form, OP_LET_A_OLD);
+                fx_annotate_arg(sc, cdr(binding), sc->curlet);
+                if (is_null(cddr(code)))
+                  check_let_a_body(sc, form);
+                else
+                  {
+                    s7_pointer p;
+                    for (p = cdr(code); is_pair(p); p = cdr(p))
+                      if (!is_fxable(sc, car(p)))
+                        break;
+                    if (is_null(p))
+                      {
+                        pair_set_syntax_op(form, OP_LET_A_NA_OLD);
+                        fx_annotate_args(sc, cdr(code), set_plist_1(sc, car(binding)));
+                        fx_tree(sc, cdr(code), car(binding), NULL, NULL, false);
+                        return;
+                      }
+                    if (is_fx_treeable(cdr(code))) fx_tree(sc, cdr(code), car(binding), NULL, NULL, false);
+                  }}}}
   else
     {
       set_opt2_pair(code, binding);
       pair_set_syntax_op(form, OP_LET_A_OLD);
       fx_annotate_arg(sc, cdr(binding), sc->curlet);
       if (is_null(cddr(code)))
-	check_let_a_body(sc, form);
+        check_let_a_body(sc, form);
       else
-	{
-	  fx_annotate_args(sc, cdr(code), set_plist_1(sc, caaar(code))); /* no effect if not syntactic -- how to fix? */
-	  if (is_fx_treeable(cdr(code))) fx_tree(sc, cdr(code), car(binding), NULL, NULL, false);
-	}}
+        {
+          fx_annotate_args(sc, cdr(code), set_plist_1(sc, caaar(code))); /* no effect if not syntactic -- how to fix? */
+          if (is_fx_treeable(cdr(code))) fx_tree(sc, cdr(code), car(binding), NULL, NULL, false);
+        }}
   if ((optimize_op(form) == OP_LET_A_OLD) &&
       (is_pair(cddr(code))) && (is_null(cdddr(code))))
     pair_set_syntax_op(form, OP_LET_A_OLD_2);
@@ -76372,18 +76372,18 @@ static s7_pointer check_named_let(s7_scheme *sc, int32_t vars)
 
       sc->args = T_Pair(safe_list_if_possible(sc, vars));
       for (s7_pointer ex = cadr(code), exp = sc->args; is_pair(ex); ex = cdr(ex), exp = cdr(exp))
-	{
-	  s7_pointer val = cdar(ex);
-	  s7_function fx = fx_choose(sc, val, sc->curlet, let_symbol_is_safe);
-	  if (fx) set_fx_direct(val, fx); else fx_ok = false;
-	  set_car(exp, caar(ex));
-	}
+        {
+          s7_pointer val = cdar(ex);
+          s7_function fx = fx_choose(sc, val, sc->curlet, let_symbol_is_safe);
+          if (fx) set_fx_direct(val, fx); else fx_ok = false;
+          set_car(exp, caar(ex));
+        }
       if (fx_ok)
-	{
-	  set_opt1_pair(code, caadr(code));
-	  if (vars == 2) set_opt3_pair(code, cadadr(code));
-	  pair_set_syntax_op(sc->code, (vars == 1) ? OP_NAMED_LET_A : ((vars == 2) ? OP_NAMED_LET_AA : OP_NAMED_LET_NA));
-	}
+        {
+          set_opt1_pair(code, caadr(code));
+          if (vars == 2) set_opt3_pair(code, cadadr(code));
+          pair_set_syntax_op(sc->code, (vars == 1) ? OP_NAMED_LET_A : ((vars == 2) ? OP_NAMED_LET_AA : OP_NAMED_LET_NA));
+        }
       optimize_lambda(sc, true, car(code), sc->args, cddr(code)); /* car(code) is the name */
       if (!in_heap(sc->args)) clear_list_in_use(sc->args);
       sc->args = sc->nil;
@@ -76400,7 +76400,7 @@ static s7_pointer check_let(s7_scheme *sc) /* called only from op_let */
   if (!is_pair(code))               /* (let . 1) */
     {
       if (is_null(code))            /* (let) */
-	syntax_error_nr(sc, "let has no variables or body: ~A", 32, form);
+        syntax_error_nr(sc, "let has no variables or body: ~A", 32, form);
       syntax_error_nr(sc, "let form is an improper list? ~A", 32, form);
     }
 
@@ -76415,15 +76415,15 @@ static s7_pointer check_let(s7_scheme *sc) /* called only from op_let */
   if (named_let)
     {
       if (!is_list(cadr(code)))             /* (let hi #t) */
-	syntax_error_nr(sc, "let variable list is messed up: ~A", 34, form);
+        syntax_error_nr(sc, "let variable list is messed up: ~A", 34, form);
       if (!is_pair(cddr(code)))             /* (let hi () . =>) or (let hi () ) */
-	{
-	  if (is_null(cddr(code)))
-	    syntax_error_nr(sc, "named let has no body: ~A", 25 , form);
-	  syntax_error_nr(sc, "named let stray dot? ~A", 23, form);
-	}
+        {
+          if (is_null(cddr(code)))
+            syntax_error_nr(sc, "named let has no body: ~A", 25 , form);
+          syntax_error_nr(sc, "named let stray dot? ~A", 23, form);
+        }
       if (is_constant_symbol(sc, car(code)))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_symbol, form));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_symbol, form));
       set_local(car(code));
       start = cadr(code);
     }
@@ -76435,41 +76435,41 @@ static s7_pointer check_let(s7_scheme *sc) /* called only from op_let */
       s7_pointer y, carx = car(x);
 
       if ((!is_pair(carx)) || (is_null(cdr(carx))))  /* (let ((x)) ...) or (let ((x 1) . (y 2)) ...) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "let variable declaration, but no value?: ~A in ~A", 49),
-			     x, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "let variable declaration, but no value?: ~A in ~A", 49),
+                             x, object_to_string_truncated(sc, form)));
 
       if (!(is_pair(cdr(carx))))                     /* (let ((x . 1))...) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "let variable declaration, ~A, is not a proper list in ~A", 56),
-			     x, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "let variable declaration, ~A, is not a proper list in ~A", 56),
+                             x, object_to_string_truncated(sc, form)));
 
       if (is_not_null(cddr(carx)))                   /* (let ((x 1 2 3)) ...) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "let variable declaration, ~A, has more than one value in ~A", 59),
-			     x, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "let variable declaration, ~A, has more than one value in ~A", 59),
+                             x, object_to_string_truncated(sc, form)));
       y = car(carx);
       if (!(is_symbol(y)))
-	{
-	  if (is_c_function(y))                      /* (let ((#_abs 3)) ...) */
-	    {
-	      s7_pointer sym = c_function_name_to_symbol(sc, y);
-	      if (is_slot(initial_slot(sym)))
-		error_nr(sc, sc->syntax_error_symbol,
-			 set_elist_2(sc, wrap_string(sc, "variable name #_~S in let is a function, not a symbol", 53), y));
-	    }
-	  error_nr(sc, sc->syntax_error_symbol,
-		   set_elist_4(sc, wrap_string(sc, "bad variable name ~W in let (it is ~A, not a symbol) in ~A", 58),
-			       y, object_type_name(sc, y),
-			       object_to_string_truncated(sc, form)));
-	}
+        {
+          if (is_c_function(y))                      /* (let ((#_abs 3)) ...) */
+            {
+              s7_pointer sym = c_function_name_to_symbol(sc, y);
+              if (is_slot(initial_slot(sym)))
+                error_nr(sc, sc->syntax_error_symbol,
+                         set_elist_2(sc, wrap_string(sc, "variable name #_~S in let is a function, not a symbol", 53), y));
+            }
+          error_nr(sc, sc->syntax_error_symbol,
+                   set_elist_4(sc, wrap_string(sc, "bad variable name ~W in let (it is ~A, not a symbol) in ~A", 58),
+                               y, object_type_name(sc, y),
+                               object_to_string_truncated(sc, form)));
+        }
       if (is_constant_symbol(sc, y))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_symbol, x));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_symbol, x));
 
       /* check for name collisions -- not sure this is required by Scheme */
       if (symbol_is_in_list(sc, y))
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "duplicate identifier in let: ~S in ~S", 37), y, form));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "duplicate identifier in let: ~S in ~S", 37), y, form));
       add_symbol_to_list(sc, y);
       set_local(y);
     }
@@ -76490,39 +76490,39 @@ static s7_pointer check_let(s7_scheme *sc) /* called only from op_let */
     {
       pair_set_syntax_op(form, OP_LET_UNCHECKED);
       if (vars == 1)
-	check_let_one_var(sc, form, start);
+        check_let_one_var(sc, form, start);
       else
-	{
-	  /* this used to check that vars < gc_trigger_size, but I can't see why */
-	  opcode_t opt = OP_UNOPT;
-	  for (s7_pointer p = start; is_pair(p); p = cdr(p))
-	    {
-	      x = car(p);
-	      if (is_fxable(sc, cadr(x)))
-		{
-		  set_fx_direct(cdr(x), fx_choose(sc, cdr(x), sc->curlet, let_symbol_is_safe));
-		  if (opt == OP_UNOPT)
-		    opt = OP_LET_NA_OLD;
-		}
-	      else opt = OP_LET_UNCHECKED;
-	    }
-	  pair_set_syntax_op(form, opt);
-	  if ((opt == OP_LET_NA_OLD) &&
-	      (is_null(cddr(code))))        /* 1 form in body */
-	    {
-	      if (vars == 2)
-		{
-		  pair_set_syntax_op(form, OP_LET_2A_OLD);
-		  set_opt1_pair(code, caar(code));
-		  set_opt2_pair(code, cadar(code));
-		}
-	      else
-		if (vars == 3)
-		  {
-		    pair_set_syntax_op(form, OP_LET_3A_OLD);
-		    set_opt1_pair(code, cadar(code));
-		    set_opt2_pair(code, caddar(code));
-		  }}}}
+        {
+          /* this used to check that vars < gc_trigger_size, but I can't see why */
+          opcode_t opt = OP_UNOPT;
+          for (s7_pointer p = start; is_pair(p); p = cdr(p))
+            {
+              x = car(p);
+              if (is_fxable(sc, cadr(x)))
+                {
+                  set_fx_direct(cdr(x), fx_choose(sc, cdr(x), sc->curlet, let_symbol_is_safe));
+                  if (opt == OP_UNOPT)
+                    opt = OP_LET_NA_OLD;
+                }
+              else opt = OP_LET_UNCHECKED;
+            }
+          pair_set_syntax_op(form, opt);
+          if ((opt == OP_LET_NA_OLD) &&
+              (is_null(cddr(code))))        /* 1 form in body */
+            {
+              if (vars == 2)
+                {
+                  pair_set_syntax_op(form, OP_LET_2A_OLD);
+                  set_opt1_pair(code, caar(code));
+                  set_opt2_pair(code, cadar(code));
+                }
+              else
+                if (vars == 3)
+                  {
+                    pair_set_syntax_op(form, OP_LET_3A_OLD);
+                    set_opt1_pair(code, cadar(code));
+                    set_opt2_pair(code, caddar(code));
+                  }}}}
 
   /* if safe_c or safe_closure as car(body), null cdr(body), see if only vars as args
    *   symbol_list is intact??
@@ -76530,13 +76530,13 @@ static s7_pointer check_let(s7_scheme *sc) /* called only from op_let */
   if (optimize_op(form) >= OP_LET_NA_OLD)
     {
       if ((!in_heap(form)) &&
-	  (body_is_safe(sc, sc->unused, cdr(code), true) >= SAFE_BODY)) /* recur_body is apparently never hit */
-	set_opt3_let(code, make_semipermanent_let(sc, car(code)));
+          (body_is_safe(sc, sc->unused, cdr(code), true) >= SAFE_BODY)) /* recur_body is apparently never hit */
+        set_opt3_let(code, make_semipermanent_let(sc, car(code)));
       else
-	{
-	  set_optimize_op(form, optimize_op(form) + 1); /* *_old -> *_new */
-	  set_opt3_let(code, sc->rootlet);
-	}}
+        {
+          set_optimize_op(form, optimize_op(form) + 1); /* *_old -> *_new */
+          set_opt3_let(code, sc->rootlet);
+        }}
 
   /* fx_tree inits */
   if ((is_pair(code)) &&
@@ -76547,21 +76547,21 @@ static s7_pointer check_let(s7_scheme *sc) /* called only from op_let */
       s7_pointer s1 = let_slots(sc->curlet), s2 = next_slot(s1), s3 = NULL;
       bool more_vars = false;
       if (tis_slot(s2))
-	{
-	  if (tis_slot(next_slot(s2)))
-	    {
-	      s3 = next_slot(s2);
-	      more_vars = tis_slot(next_slot(s3));
-	      s3 = slot_symbol(s3);
-	    }
-	  s2 = slot_symbol(s2);
-	}
+        {
+          if (tis_slot(next_slot(s2)))
+            {
+              s3 = next_slot(s2);
+              more_vars = tis_slot(next_slot(s3));
+              s3 = slot_symbol(s3);
+            }
+          s2 = slot_symbol(s2);
+        }
       s1 = slot_symbol(s1);
       for (s7_pointer p = car(code); is_pair(p); p = cdr(p)) /* var list */
-	{
-	  s7_pointer init = cdar(p);
-	  fx_tree(sc, init, s1, s2, s3, more_vars);
-	}}
+        {
+          s7_pointer init = cdar(p);
+          fx_tree(sc, init, s1, s2, s3, more_vars);
+        }}
   return(code);
 }
 
@@ -76614,31 +76614,31 @@ static bool op_let1(s7_scheme *sc)
     {
       sc->args = cons(sc, sc->value, sc->args);
       if (is_pair(sc->code))
-	{
-	  x = cdar(sc->code);
-	  if (has_fx(x))
-	    {
+        {
+          x = cdar(sc->code);
+          if (has_fx(x))
+            {
 #if S7_DEBUGGING
-	      s7_pointer old_args = sc->args;
+              s7_pointer old_args = sc->args;
 #endif
-	      sc->value = fx_call(sc, x);
+              sc->value = fx_call(sc, x);
 #if S7_DEBUGGING
-	      if (sc->args != old_args)
-		{
-		  fprintf(stderr, "%s[%d]: %s %s\n", __func__, __LINE__, display(old_args), display(sc->args));
-		  gdb_break();
-		}
-#endif
-	    }
-	  else
-	    {
-	      check_stack_size(sc);
-	      push_stack(sc, OP_LET1, sc->args, cdr(sc->code));
-	      sc->code = car(x);
-	      return(false);
-	    }
-	  sc->code = cdr(sc->code);
-	}
+              if (sc->args != old_args)
+                {
+                  fprintf(stderr, "%s[%d]: %s %s\n", __func__, __LINE__, display(old_args), display(sc->args));
+                  gdb_break();
+                }
+#endif
+            }
+          else
+            {
+              check_stack_size(sc);
+              push_stack(sc, OP_LET1, sc->args, cdr(sc->code));
+              sc->code = car(x);
+              return(false);
+            }
+          sc->code = cdr(sc->code);
+        }
       else break;
     }
   x = proper_list_reverse_in_place(sc, sc->args);
@@ -76664,15 +76664,15 @@ static bool op_let1(s7_scheme *sc)
       y = args;
 
       for (x = cdr(x); is_not_null(y); x = cdr(x))
-	{
-	  sym = caar(x);
-	  args = cdr(args);
-	  reuse_as_slot(y, sym, unchecked_car(y));
-	  symbol_set_local_slot(sym, id, y);
-	  slot_set_next(sp, y);
-	  sp = y;
-	  y = args;
-	}
+        {
+          sym = caar(x);
+          args = cdr(args);
+          reuse_as_slot(y, sym, unchecked_car(y));
+          symbol_set_local_slot(sym, id, y);
+          slot_set_next(sp, y);
+          sp = y;
+          y = args;
+        }
       slot_set_next(sp, slot_end);
     }
   sc->code = T_Pair(cdr(sc->code));
@@ -76695,19 +76695,19 @@ static bool op_let(s7_scheme *sc)
       sc->code = sc->value;
       set_curlet(sc, make_let(sc, sc->curlet));
       if (named_let)  /* see also below -- there are 3 cases */
-	{
-	  s7_pointer body = cddr(sc->code);
-	  set_opt2_int(cdr(sc->code), 0);
-	  sc->x = make_closure_unchecked(sc, sc->nil, body, T_CLOSURE, 0);
-	  /* args = () in new closure, see NAMED_LET_NO_VARS above */
-	  /* if this is a safe closure, we can build its let in advance and name it (a thunk in this case) */
-	  set_funclet(closure_let(sc->x));
-	  funclet_set_function(closure_let(sc->x), car(sc->code));
-	  add_slot_checked(sc, sc->curlet, car(sc->code), sc->x);
-	  set_curlet(sc, make_let(sc, sc->curlet)); /* inner let */
-	  sc->code = T_Pair(body);
-	  sc->x = sc->unused;
-	}
+        {
+          s7_pointer body = cddr(sc->code);
+          set_opt2_int(cdr(sc->code), 0);
+          sc->x = make_closure_unchecked(sc, sc->nil, body, T_CLOSURE, 0);
+          /* args = () in new closure, see NAMED_LET_NO_VARS above */
+          /* if this is a safe closure, we can build its let in advance and name it (a thunk in this case) */
+          set_funclet(closure_let(sc->x));
+          funclet_set_function(closure_let(sc->x), car(sc->code));
+          add_slot_checked(sc, sc->curlet, car(sc->code), sc->x);
+          set_curlet(sc, make_let(sc, sc->curlet)); /* inner let */
+          sc->code = T_Pair(body);
+          sc->x = sc->unused;
+        }
       else sc->code = T_Pair(cdr(sc->code));
       return(true);
     }
@@ -76951,10 +76951,10 @@ static Inline void inline_op_let_na_new(s7_scheme *sc) /* called once in eval, c
       s7_pointer arg = cdar(p);
       sc->value = fx_call(sc, arg);
       if (!sp)
-	{
-	  add_slot(sc, let, caar(p), sc->value);
-	  sp = let_slots(let);
-	}
+        {
+          add_slot(sc, let, caar(p), sc->value);
+          sp = let_slots(let);
+        }
       else sp = inline_add_slot_at_end(sc, let_id(let), sp, caar(p), sc->value);
     }
   sc->let_number++;
@@ -77038,15 +77038,15 @@ static bool check_let_star(s7_scheme *sc)
   if (named_let)
     {
       if (!is_list(cadr(code)))                 /* (let* hi #t) */
-	syntax_error_nr(sc, "let* variable list is messed up: ~A", 35, form);
+        syntax_error_nr(sc, "let* variable list is messed up: ~A", 35, form);
       if (!is_pair(cddr(code)))                 /* (let* hi () . =>) or (let* hi () ) */
-	{
-	  if (is_null(cddr(code)))
-	    syntax_error_nr(sc, "named let* has no body: ~A", 26, form);
-	  syntax_error_nr(sc, "named let* stray dot? ~A", 24, form);
-	}
+        {
+          if (is_null(cddr(code)))
+            syntax_error_nr(sc, "named let* has no body: ~A", 26, form);
+          syntax_error_nr(sc, "named let* stray dot? ~A", 24, form);
+        }
       if (is_constant_symbol(sc, car(code)))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_star_symbol, form));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_star_symbol, form));
       set_local(car(code));
     }
   else
@@ -77058,39 +77058,39 @@ static bool check_let_star(s7_scheme *sc)
     {
       s7_pointer var, var_and_val = car(vars);
       if (!is_pair(var_and_val))                    /* (let* (3) ... */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "let* variable list, ~A, is messed up in ~A", 42),
-			     var_and_val, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "let* variable list, ~A, is messed up in ~A", 42),
+                             var_and_val, object_to_string_truncated(sc, form)));
 
       if (!(is_pair(cdr(var_and_val))))             /* (let* ((x . 1))...) */
-	{
-	  if (is_null(cdr(var_and_val)))
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_3(sc, wrap_string(sc, "let* variable declaration, but no value?: ~A in ~A", 50),
-				 var_and_val, object_to_string_truncated(sc, form)));
-	  error_nr(sc, sc->syntax_error_symbol,
-		   set_elist_3(sc, wrap_string(sc, "let* variable declaration is not a proper list: ~A in ~A", 56),
-			       var_and_val, object_to_string_truncated(sc, form)));
-	}
+        {
+          if (is_null(cdr(var_and_val)))
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_3(sc, wrap_string(sc, "let* variable declaration, but no value?: ~A in ~A", 50),
+                                 var_and_val, object_to_string_truncated(sc, form)));
+          error_nr(sc, sc->syntax_error_symbol,
+                   set_elist_3(sc, wrap_string(sc, "let* variable declaration is not a proper list: ~A in ~A", 56),
+                               var_and_val, object_to_string_truncated(sc, form)));
+        }
       if (!is_null(cddr(var_and_val)))              /* (let* ((c 1 2)) ...) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "let* variable declaration has more than one value?: ~A in ~A", 60),
-			     var_and_val, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "let* variable declaration has more than one value?: ~A in ~A", 60),
+                             var_and_val, object_to_string_truncated(sc, form)));
 
       var = car(var_and_val);
       if (!(is_symbol(var)))                        /* (let* ((3 1)) 1) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_4(sc, wrap_string(sc, "bad variable name ~W in let* (it is ~A, not a symbol) in ~A", 59),
-			     var, object_type_name(sc, var),
-			     object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_4(sc, wrap_string(sc, "bad variable name ~W in let* (it is ~A, not a symbol) in ~A", 59),
+                             var, object_type_name(sc, var),
+                             object_to_string_truncated(sc, form)));
 
       if (is_constant_symbol(sc, var))              /* (let* ((pi 3)) ...) */
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_star_symbol, var_and_val));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_star_symbol, var_and_val));
 
       if ((named_let) && (symbol_is_in_arg_list(var, cdr(vars)))) /* (let* loop ((a 1) (a 2)) ...) -- added 2-Dec-19 */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "named let* parameter, ~A, is used twice in the parameter list in ~A", 67),
-			     var, object_to_string_truncated(sc, form)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "named let* parameter, ~A, is used twice in the parameter list in ~A", 67),
+                             var, object_to_string_truncated(sc, form)));
       /* currently (let* ((a 1) (a (+ a 1))) a) is 2, not an error */
 
       if (symbol_is_in_list(sc, var)) shadowing = true;
@@ -77099,8 +77099,8 @@ static bool check_let_star(s7_scheme *sc)
     }
   if (!is_null(vars))
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_3(sc, wrap_string(sc, "let* variable list is not a proper list: ~A in ~A", 49),
-			 vars, object_to_string_truncated(sc, form)));
+             set_elist_3(sc, wrap_string(sc, "let* variable list is not a proper list: ~A in ~A", 49),
+                         vars, object_to_string_truncated(sc, form)));
 
   if (!s7_is_proper_list(sc, cdr(code)))
     syntax_error_nr(sc, "stray dot in let* body: ~S", 26, cdr(code));
@@ -77110,31 +77110,31 @@ static bool check_let_star(s7_scheme *sc)
   else
     for (vars = (named_let) ? cadr(code) : car(code); is_pair(vars); vars = cdr(vars))
       if (is_fxable(sc, cadar(vars)))
-	set_fx_direct(cdar(vars), fx_choose(sc, cdar(vars), sc->curlet, let_star_symbol_is_safe));
+        set_fx_direct(cdar(vars), fx_choose(sc, cdar(vars), sc->curlet, let_star_symbol_is_safe));
       else fxable = false;
 
   if (named_let)
     {
       if (is_null(cadr(code)))
-	{
-	  pair_set_syntax_op(form, OP_NAMED_LET_NO_VARS);
-	  set_opt1_pair(form, cdddr(form));
-	}
+        {
+          pair_set_syntax_op(form, OP_NAMED_LET_NO_VARS);
+          set_opt1_pair(form, cdddr(form));
+        }
       else
-	{
-	  pair_set_syntax_op(form, OP_NAMED_LET_STAR);
-	  set_opt2_con(code, cadr(caadr(code)));
-	}
+        {
+          pair_set_syntax_op(form, OP_NAMED_LET_STAR);
+          set_opt2_con(code, cadr(caadr(code)));
+        }
       sc->value = cdr(code);
       if (is_null(car(sc->value)))                   /* (let* name () ... */
-	{
-	  s7_pointer let_sym = car(code);
-	  set_curlet(sc, make_let(sc, sc->curlet));
-	  sc->code = T_Pair(cdr(sc->value));
-	  add_slot_checked(sc, sc->curlet, let_sym, make_closure_unchecked(sc, sc->nil, sc->code, T_CLOSURE_STAR, 0));
-	  set_curlet(sc, make_let(sc, sc->curlet));  /* inner let */
-	  return(false);
-	}
+        {
+          s7_pointer let_sym = car(code);
+          set_curlet(sc, make_let(sc, sc->curlet));
+          sc->code = T_Pair(cdr(sc->value));
+          add_slot_checked(sc, sc->curlet, let_sym, make_closure_unchecked(sc, sc->nil, sc->code, T_CLOSURE_STAR, 0));
+          set_curlet(sc, make_let(sc, sc->curlet));  /* inner let */
+          return(false);
+        }
       set_curlet(sc, make_let(sc, sc->curlet));
       push_stack(sc, OP_LET_STAR1, code, cadr(code));
       sc->code = cadr(caadr(code));               /* first var val */
@@ -77150,30 +77150,30 @@ static bool check_let_star(s7_scheme *sc)
   else
     if (is_null(cdar(code)))
       {
-	check_let_one_var(sc, form, car(code));   /* (let* ((var...))...) -> (let ((var...))...) */
-	if (optimize_op(form) >= OP_LET_NA_OLD)
-	  {
-	    if ((!in_heap(form)) &&
-		(body_is_safe(sc, sc->unused, cdr(code), true) >= SAFE_BODY))
-	      set_opt3_let(code, make_semipermanent_let(sc, car(code)));
-	    else
-	      {
-		set_optimize_op(form, optimize_op(form) + 1); /* *_old -> *_new */
-		set_opt3_let(code, sc->rootlet);
-	      }}}
+        check_let_one_var(sc, form, car(code));   /* (let* ((var...))...) -> (let ((var...))...) */
+        if (optimize_op(form) >= OP_LET_NA_OLD)
+          {
+            if ((!in_heap(form)) &&
+                (body_is_safe(sc, sc->unused, cdr(code), true) >= SAFE_BODY))
+              set_opt3_let(code, make_semipermanent_let(sc, car(code)));
+            else
+              {
+                set_optimize_op(form, optimize_op(form) + 1); /* *_old -> *_new */
+                set_opt3_let(code, sc->rootlet);
+              }}}
     else  /* multiple variables */
       {
-	if (fxable)
-	  {
-	    pair_set_syntax_op(form, OP_LET_STAR_NA);
-	    if ((is_null(cddr(code))) &&
-		(is_fxable(sc, cadr(code))))
-	      {
-		fx_annotate_arg(sc, cdr(code), sc->curlet);
-		pair_set_syntax_op(form, OP_LET_STAR_NA_A);
-	      }}
-	else pair_set_syntax_op(form, OP_LET_STAR2);
-	set_opt2_con(code, cadaar(code));
+        if (fxable)
+          {
+            pair_set_syntax_op(form, OP_LET_STAR_NA);
+            if ((is_null(cddr(code))) &&
+                (is_fxable(sc, cadr(code))))
+              {
+                fx_annotate_arg(sc, cdr(code), sc->curlet);
+                pair_set_syntax_op(form, OP_LET_STAR_NA_A);
+              }}
+        else pair_set_syntax_op(form, OP_LET_STAR2);
+        set_opt2_con(code, cadaar(code));
       }
   push_stack(sc, ((intptr_t)((shadowing) ? OP_LET_STAR_SHADOWED : OP_LET_STAR1)), code, car(code));
   /* args is the let body, saved for later, code is the list of vars+initial-values */
@@ -77189,16 +77189,16 @@ static bool op_let_star_shadowed(s7_scheme *sc)
       set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, caar(sc->code), sc->value));
       sc->code = cdr(sc->code);
       if (is_pair(sc->code))
-	{
-	  s7_pointer x = cdar(sc->code);
-	  if (has_fx(x))
-	    sc->value = fx_call(sc, x);
-	  else
-	    {
-	      push_stack_direct(sc, OP_LET_STAR_SHADOWED);
-	      sc->code = car(x);
-	      return(true);
-	    }}
+        {
+          s7_pointer x = cdar(sc->code);
+          if (has_fx(x))
+            sc->value = fx_call(sc, x);
+          else
+            {
+              push_stack_direct(sc, OP_LET_STAR_SHADOWED);
+              sc->code = car(x);
+              return(true);
+            }}
       else break;
     }
   sc->code = cdr(sc->args); /* original sc->code set in push_stack above */
@@ -77212,32 +77212,32 @@ static inline bool op_let_star1(s7_scheme *sc)
   while (true)
     {
       if (let_counter == sc->capture_let_counter)
-	{
-	  if (sp == NULL)
-	    {
-	      add_slot_checked(sc, sc->curlet, caar(sc->code), sc->value);
-	      sp = let_slots(sc->curlet);
-	    }
-	  else sp = inline_add_slot_at_end(sc, let_id(sc->curlet), sp, caar(sc->code), sc->value);
-	}
+        {
+          if (sp == NULL)
+            {
+              add_slot_checked(sc, sc->curlet, caar(sc->code), sc->value);
+              sp = let_slots(sc->curlet);
+            }
+          else sp = inline_add_slot_at_end(sc, let_id(sc->curlet), sp, caar(sc->code), sc->value);
+        }
       else
-	{
-	  set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, caar(sc->code), sc->value));
-	  sp = let_slots(sc->curlet);
-	  let_counter = sc->capture_let_counter;
-	}
+        {
+          set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, caar(sc->code), sc->value));
+          sp = let_slots(sc->curlet);
+          let_counter = sc->capture_let_counter;
+        }
       sc->code = cdr(sc->code);
       if (is_pair(sc->code))
-	{
-	  s7_pointer x = cdar(sc->code);
-	  if (has_fx(x))
-	    sc->value = fx_call(sc, x);
-	  else
-	    {
-	      push_stack_direct(sc, OP_LET_STAR1);
-	      sc->code = car(x);
-	      return(true);
-	    }}
+        {
+          s7_pointer x = cdar(sc->code);
+          if (has_fx(x))
+            sc->value = fx_call(sc, x);
+          else
+            {
+              push_stack_direct(sc, OP_LET_STAR1);
+              sc->code = car(x);
+              return(true);
+            }}
       else break;
     }
   sc->code = sc->args; /* original sc->code set in push_stack above */
@@ -77247,17 +77247,17 @@ static inline bool op_let_star1(s7_scheme *sc)
       /* now we need to declare the new function (in the outer let) -- must delay this because init might reference same-name outer func */
       /*   but the let name might be shadowed by a variable: (let* x ((x 1))...) so the name's symbol_id can be incorrect */
       if (symbol_id(name) > let_id(let_outlet(sc->curlet)))
-	{
-	  s7_int cur_id = symbol_id(name);
-	  s7_pointer cur_slot = local_slot(name);
-	  symbol_set_id_unchecked(name, let_id(let_outlet(sc->curlet)));
-	  add_slot_checked(sc, let_outlet(sc->curlet), name,
-			   make_closure_unchecked(sc, args, body, T_CLOSURE_STAR, (is_null(args)) ? 0 : CLOSURE_ARITY_NOT_SET));
-	  symbol_set_id_unchecked(name, cur_id);
-	  set_local_slot(name, cur_slot);
-	}
+        {
+          s7_int cur_id = symbol_id(name);
+          s7_pointer cur_slot = local_slot(name);
+          symbol_set_id_unchecked(name, let_id(let_outlet(sc->curlet)));
+          add_slot_checked(sc, let_outlet(sc->curlet), name,
+                           make_closure_unchecked(sc, args, body, T_CLOSURE_STAR, (is_null(args)) ? 0 : CLOSURE_ARITY_NOT_SET));
+          symbol_set_id_unchecked(name, cur_id);
+          set_local_slot(name, cur_slot);
+        }
       else add_slot_checked(sc, let_outlet(sc->curlet), name,
-			    make_closure_unchecked(sc, args, body, T_CLOSURE_STAR, (is_null(args)) ? 0 : CLOSURE_ARITY_NOT_SET));
+                            make_closure_unchecked(sc, args, body, T_CLOSURE_STAR, (is_null(args)) ? 0 : CLOSURE_ARITY_NOT_SET));
 
       sc->code = body;
     }
@@ -77275,20 +77275,20 @@ static void op_let_star_na(s7_scheme *sc)
     {
       s7_pointer val = fx_call(sc, cdar(p)); /* eval in outer let */
       if (let_counter == sc->capture_let_counter)
-	{
-	  if (!sp)
-	    {
-	      add_slot_checked(sc, sc->curlet, caar(p), val);
-	      sp = let_slots(sc->curlet);
-	    }
-	  else sp = inline_add_slot_at_end(sc, let_id(sc->curlet), sp, caar(p), val);
-	}
+        {
+          if (!sp)
+            {
+              add_slot_checked(sc, sc->curlet, caar(p), val);
+              sp = let_slots(sc->curlet);
+            }
+          else sp = inline_add_slot_at_end(sc, let_id(sc->curlet), sp, caar(p), val);
+        }
       else
-	{
-	  set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, caar(p), val));
-	  sp = let_slots(sc->curlet);
-	  let_counter = sc->capture_let_counter;
-	}}
+        {
+          set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, caar(p), val));
+          sp = let_slots(sc->curlet);
+          let_counter = sc->capture_let_counter;
+        }}
   sc->code = T_Pair(cdr(sc->code));
 }
 
@@ -77301,20 +77301,20 @@ static void op_let_star_na_a(s7_scheme *sc)
     {
       s7_pointer val = fx_call(sc, cdar(p));
       if (let_counter == sc->capture_let_counter)
-	{
-	  if (!sp)
-	    {
-	      add_slot_checked(sc, sc->curlet, caar(p), val);
-	      sp = let_slots(sc->curlet);
-	    }
-	  else sp = inline_add_slot_at_end(sc, let_id(sc->curlet), sp, caar(p), val);
-	}
+        {
+          if (!sp)
+            {
+              add_slot_checked(sc, sc->curlet, caar(p), val);
+              sp = let_slots(sc->curlet);
+            }
+          else sp = inline_add_slot_at_end(sc, let_id(sc->curlet), sp, caar(p), val);
+        }
       else
-	{
-	  set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, caar(p), val));
-	  sp = let_slots(sc->curlet);
-	  let_counter = sc->capture_let_counter;
-	}}
+        {
+          set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, caar(p), val));
+          sp = let_slots(sc->curlet);
+          let_counter = sc->capture_let_counter;
+        }}
   sc->value = fx_call(sc, cdr(sc->code));
 }
 
@@ -77352,33 +77352,33 @@ static void check_letrec(s7_scheme *sc, bool letrec)
     {
       s7_pointer y, carx;
       if (!is_pair(x))                        /* (letrec ((a 1) . 2) ...) */
-	syntax_error_with_caller_nr(sc, "~A: improper list of variables? ~A", 34, caller, sc->code);
+        syntax_error_with_caller_nr(sc, "~A: improper list of variables? ~A", 34, caller, sc->code);
 
       carx = car(x);
       if (!is_pair(carx))                     /* (letrec (1 2) #t) */
-	syntax_error_with_caller_nr(sc, "~A: bad variable ~S (should be a pair (name value))", 51, caller, carx);
+        syntax_error_with_caller_nr(sc, "~A: bad variable ~S (should be a pair (name value))", 51, caller, carx);
 
       y = car(carx);
       if (!(is_symbol(y)))
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_5(sc, wrap_string(sc, "bad variable name ~W in ~A (it is ~A, not a symbol) in ~A", 57),
-			     y, caller, object_type_name(sc, y),
-			     object_to_string_truncated(sc, sc->code)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_5(sc, wrap_string(sc, "bad variable name ~W in ~A (it is ~A, not a symbol) in ~A", 57),
+                             y, caller, object_type_name(sc, y),
+                             object_to_string_truncated(sc, sc->code)));
       if (is_constant_symbol(sc, y))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, caller, x));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, caller, x));
 
       if (!is_pair(cdr(carx)))                /* (letrec ((x . 1))...) */
-	{
-	  if (is_null(cdr(carx)))             /* (letrec ((x)) x) -- perhaps this is legal? */
-	    syntax_error_with_caller_nr(sc, "~A: variable declaration has no value?: ~A", 42, caller, carx);
-	  syntax_error_with_caller_nr(sc, "~A: variable declaration is not a proper list?: ~A", 50, caller, carx);
-	}
+        {
+          if (is_null(cdr(carx)))             /* (letrec ((x)) x) -- perhaps this is legal? */
+            syntax_error_with_caller_nr(sc, "~A: variable declaration has no value?: ~A", 42, caller, carx);
+          syntax_error_with_caller_nr(sc, "~A: variable declaration is not a proper list?: ~A", 50, caller, carx);
+        }
       if (is_not_null(cddr(carx)))            /* (letrec ((x 1 2 3)) ...) */
-	syntax_error_with_caller_nr(sc, "~A: variable declaration has more than one value?: ~A", 53, caller, carx);
+        syntax_error_with_caller_nr(sc, "~A: variable declaration has more than one value?: ~A", 53, caller, carx);
 
       /* check for name collisions -- this is needed in letrec* else which of the two legit values does our "rec" refer to, so to speak */
       if (symbol_is_in_list(sc, y))
-	syntax_error_with_caller_nr(sc, "~A: duplicate identifier: ~A", 28, caller, y);
+        syntax_error_with_caller_nr(sc, "~A: duplicate identifier: ~A", 28, caller, y);
       add_symbol_to_list(sc, y);
       set_local(y);
     }
@@ -77400,17 +77400,17 @@ static void letrec_setup_closures(s7_scheme *sc)
   for (s7_pointer slot = let_slots(sc->curlet); tis_slot(slot); slot = next_slot(slot))
     if (is_closure(slot_value(slot)))
       {
-	s7_pointer func = slot_value(slot);
-	if ((!is_safe_closure(func)) ||
-	    (!is_optimized(car(closure_body(func)))))
-	  optimize_lambda(sc, true, slot_symbol(slot), closure_args(func), closure_body(func));
-	if (is_safe_closure_body(closure_body(func)))
-	  {
-	    set_safe_closure(func);
-	    if (is_very_safe_closure_body(closure_body(func)))
-	      set_very_safe_closure(func);
-	  }
-	make_funclet(sc, func, slot_symbol(slot), closure_let(func));
+        s7_pointer func = slot_value(slot);
+        if ((!is_safe_closure(func)) ||
+            (!is_optimized(car(closure_body(func)))))
+          optimize_lambda(sc, true, slot_symbol(slot), closure_args(func), closure_body(func));
+        if (is_safe_closure_body(closure_body(func)))
+          {
+            set_safe_closure(func);
+            if (is_very_safe_closure_body(closure_body(func)))
+              set_very_safe_closure(func);
+          }
+        make_funclet(sc, func, slot_symbol(slot), closure_let(func));
       }
 }
 
@@ -77442,20 +77442,20 @@ static bool op_letrec_unchecked(s7_scheme *sc)
     {
       s7_pointer slot;
       for (s7_pointer x = car(code); is_not_null(x); x = cdr(x))
-	{
-	  slot = add_slot_checked(sc, sc->curlet, caar(x), sc->undefined);
-	  slot_set_pending_value(slot, sc->undefined);
-	  slot_set_expression(slot, cdar(x));
-	  set_checked_slot(slot);
-	}
+        {
+          slot = add_slot_checked(sc, sc->curlet, caar(x), sc->undefined);
+          slot_set_pending_value(slot, sc->undefined);
+          slot_set_expression(slot, cdar(x));
+          set_checked_slot(slot);
+        }
       for (slot = let_slots(sc->curlet); tis_slot(slot) && (has_fx(slot_expression(slot))); slot = next_slot(slot))
-	slot_set_pending_value(slot, fx_call(sc, slot_expression(slot)));
+        slot_set_pending_value(slot, fx_call(sc, slot_expression(slot)));
       if (tis_slot(slot))
-	{
-	  push_stack(sc, OP_LETREC1, slot, code);
-	  sc->code = car(slot_expression(slot));
-	  return(true);
-	}
+        {
+          push_stack(sc, OP_LETREC1, slot, code);
+          sc->code = car(slot_expression(slot));
+          return(true);
+        }
       op_letrec2(sc);
     }
   sc->code = T_Pair(cdr(code));
@@ -77492,20 +77492,20 @@ static bool op_letrec_star_unchecked(s7_scheme *sc)
     {
       s7_pointer slot;
       for (s7_pointer x = car(code); is_not_null(x); x = cdr(x))
-	{
-	  slot = add_slot_checked(sc, sc->curlet, caar(x), sc->undefined);
-	  slot_set_expression(slot, cdar(x));
-	}
+        {
+          slot = add_slot_checked(sc, sc->curlet, caar(x), sc->undefined);
+          slot_set_expression(slot, cdar(x));
+        }
       let_set_slots(sc->curlet, reverse_slots(let_slots(sc->curlet)));
 
       for (slot = let_slots(sc->curlet); tis_slot(slot) && (has_fx(slot_expression(slot))); slot = next_slot(slot))
-	slot_set_value(slot, fx_call(sc, slot_expression(slot)));
+        slot_set_value(slot, fx_call(sc, slot_expression(slot)));
       if (tis_slot(slot))
-	{
-	  push_stack(sc, OP_LETREC_STAR1, slot, code);
-	  sc->code = car(slot_expression(slot));
-	  return(true);
-	}}
+        {
+          push_stack(sc, OP_LETREC_STAR1, slot, code);
+          sc->code = car(slot_expression(slot));
+          return(true);
+        }}
   sc->code = T_Pair(cdr(code));
   return(false);
 }
@@ -77547,36 +77547,36 @@ static void check_let_temporarily(s7_scheme *sc)
     {
       s7_pointer carx, caarx;
       if (!is_pair(x))                        /* (let-temporarily ((a 1) . 2) ...) */
-	syntax_error_nr(sc, "let-temporarily: improper list of variables? ~A", 47, form);
+        syntax_error_nr(sc, "let-temporarily: improper list of variables? ~A", 47, form);
 
       carx = car(x);
       if (!is_pair(carx))                     /* (let-temporarily (1 2) #t) */
-	syntax_error_nr(sc, "let-temporarily: bad variable ~S (it should be a pair (name value))", 67, carx);
+        syntax_error_nr(sc, "let-temporarily: bad variable ~S (it should be a pair (name value))", 67, carx);
 
       caarx = car(carx);
       if (is_symbol(caarx))
-	{
-	  if (is_constant_symbol(sc, caarx)) /* (let-temporarily ((pi 3)) ...) */
-	    error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_temporarily_symbol, x));
-	}
+        {
+          if (is_constant_symbol(sc, caarx)) /* (let-temporarily ((pi 3)) ...) */
+            error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_temporarily_symbol, x));
+        }
       else
-	if (!is_pair(caarx))                 /* (let-temporarily ((1 2)) ...) */
-	  syntax_error_nr(sc, "let-temporarily: bad variable ~S (it should be a symbol or a pair)", 66, caarx);
+        if (!is_pair(caarx))                 /* (let-temporarily ((1 2)) ...) */
+          syntax_error_nr(sc, "let-temporarily: bad variable ~S (it should be a symbol or a pair)", 66, caarx);
 
       if (!is_pair(cdr(carx)))               /* (let-temporarily ((x . 1))...) */
-	syntax_error_nr(sc, "let-temporarily: variable declaration value is messed up: ~S", 60, carx);
+        syntax_error_nr(sc, "let-temporarily: variable declaration value is messed up: ~S", 60, carx);
 
       if (is_not_null(cddr(carx)))           /* (let-temporarily ((x 1 2 3)) ...) */
-	syntax_error_nr(sc, "let-temporarily: variable declaration has more than one value?: ~A", 66, carx);
+        syntax_error_nr(sc, "let-temporarily: variable declaration has more than one value?: ~A", 66, carx);
 
       if ((all_fx) &&
-	  ((!is_symbol(caarx)) || (!is_fxable(sc, cadr(carx))))) /* if all_fx, each var is (symbol fxable-expr) */
-	all_fx = false;
+          ((!is_symbol(caarx)) || (!is_fxable(sc, cadr(carx))))) /* if all_fx, each var is (symbol fxable-expr) */
+        all_fx = false;
       if ((all_s7) &&
-	  ((!is_pair(caarx)) || (car(caarx) != sc->s7_starlet_symbol) ||
-	   (!is_quoted_symbol(cadr(caarx))) || (is_keyword(cadr(cadr(caarx)))) ||
-	   (!is_fxable(sc, cadr(carx)))))
-	all_s7 = false;
+          ((!is_pair(caarx)) || (car(caarx) != sc->s7_starlet_symbol) ||
+           (!is_quoted_symbol(cadr(caarx))) || (is_keyword(cadr(cadr(caarx)))) ||
+           (!is_fxable(sc, cadr(carx)))))
+        all_s7 = false;
     }
   if (!s7_is_proper_list(sc, cdr(code)))
     syntax_error_nr(sc, "stray dot in let-temporarily body: ~S", 37, cdr(code));
@@ -77585,26 +77585,26 @@ static void check_let_temporarily(s7_scheme *sc)
     {
       pair_set_syntax_op(form, (all_fx) ? ((is_null(cdar(code))) ? OP_LET_TEMP_A : OP_LET_TEMP_NA) : OP_LET_TEMP_S7);
       for (x = car(code); is_pair(x); x = cdr(x))
-	fx_annotate_arg(sc, cdar(x), sc->curlet);
+        fx_annotate_arg(sc, cdar(x), sc->curlet);
 
       if ((optimize_op(form) == OP_LET_TEMP_A) && (is_pair(cdr(code))) && (is_null(cddr(code))) && (is_fxable(sc, cadr(code))))
-	{
-	  fx_annotate_arg(sc, cdr(code), sc->curlet);
-	  pair_set_syntax_op(form, OP_LET_TEMP_A_A);
-	}
+        {
+          fx_annotate_arg(sc, cdr(code), sc->curlet);
+          pair_set_syntax_op(form, OP_LET_TEMP_A_A);
+        }
       else
-	if (all_s7) /* not OP_LET_TEMP_NA */
-	  {
-	    s7_pointer var = caar(code);
-	    if ((is_fxable(sc, cadr(var))) &&  /* code: ((((*s7* 'openlets) fxable-expr)) ...) */
-		(is_null(cdar(code))))
-	      {
-		if ((is_quoted_symbol(cadar(var))) &&
-		    (s7_starlet_symbol(cadr(cadar(var))) == SL_OPENLETS)) /* (cadr(cadar(var)) == make_symbol_with_strlen(sc, "openlets"))) */
-		  {
-		    pair_set_syntax_op(form, OP_LET_TEMP_S7_DIRECT);
-		    set_opt1_pair(form, cdr(var));
-		  }}}
+        if (all_s7) /* not OP_LET_TEMP_NA */
+          {
+            s7_pointer var = caar(code);
+            if ((is_fxable(sc, cadr(var))) &&  /* code: ((((*s7* 'openlets) fxable-expr)) ...) */
+                (is_null(cdar(code))))
+              {
+                if ((is_quoted_symbol(cadar(var))) &&
+                    (s7_starlet_symbol(cadr(cadar(var))) == SL_OPENLETS)) /* (cadr(cadar(var)) == make_symbol_with_strlen(sc, "openlets"))) */
+                  {
+                    pair_set_syntax_op(form, OP_LET_TEMP_S7_DIRECT);
+                    set_opt1_pair(form, cdr(var));
+                  }}}
 
       if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) {fx_curlet_tree(sc, code); fx_curlet_tree_in(sc, code);}
     }
@@ -77612,20 +77612,20 @@ static void check_let_temporarily(s7_scheme *sc)
     {
       pair_set_syntax_op(form, OP_LET_TEMP_UNCHECKED);
       if ((is_pair(car(code))) && (is_null(cdar(code))) && (is_pair(caar(code))))
-	{
-	  s7_pointer var = caar(code);
-	  s7_pointer val = cadr(var);
-	  var = car(var);
-	  if ((is_pair(var)) && (car(var) == sc->setter_symbol) && (is_pair(cdr(var))) && (is_pair(cddr(var))) && (val == sc->F))
-	    {
-	      /* (let-temporarily (((setter (slot-symbol cp) (slot-env cp)) #f)) ...) reactive.scm */
-	      optimize_expression(sc, cadr(var), 0, sc->curlet, false);
-	      optimize_expression(sc, caddr(var), 0, sc->curlet, false);
-	      if ((is_fxable(sc, cadr(var))) && (is_fxable(sc, caddr(var))))
-		{
-		  fx_annotate_args(sc, cdr(var), sc->curlet);
-		  pair_set_syntax_op(form, OP_LET_TEMP_SETTER);
-		}}}}
+        {
+          s7_pointer var = caar(code);
+          s7_pointer val = cadr(var);
+          var = car(var);
+          if ((is_pair(var)) && (car(var) == sc->setter_symbol) && (is_pair(cdr(var))) && (is_pair(cddr(var))) && (val == sc->F))
+            {
+              /* (let-temporarily (((setter (slot-symbol cp) (slot-env cp)) #f)) ...) reactive.scm */
+              optimize_expression(sc, cadr(var), 0, sc->curlet, false);
+              optimize_expression(sc, caddr(var), 0, sc->curlet, false);
+              if ((is_fxable(sc, cadr(var))) && (is_fxable(sc, caddr(var))))
+                {
+                  fx_annotate_args(sc, cdr(var), sc->curlet);
+                  pair_set_syntax_op(form, OP_LET_TEMP_SETTER);
+                }}}}
 }
 
 static void op_let_temp_unchecked(s7_scheme *sc)
@@ -77642,7 +77642,7 @@ static void op_let_temp_init1_1(s7_scheme *sc)
     {
       clear_symbol_from_symbol(sc->value);
       if (is_immutable_symbol(sc->value))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_temporarily_symbol, sc->value));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, cant_bind_immutable_string, sc->let_temporarily_symbol, sc->value));
       sc->value = s7_symbol_value(sc, sc->value);
     }
   set_caddr(sc->args, cons(sc, sc->value, caddr(sc->args)));
@@ -77661,25 +77661,25 @@ static bool op_let_temp_init1(s7_scheme *sc)
       set_car(binding, cons_unchecked(sc, new_value, car(binding)));
       set_car(sc->args, cdar(sc->args));
       if (is_symbol(settee))                    /* get initial values */
-	set_caddr(sc->args, cons_unchecked(sc, lookup_checked(sc, settee), caddr(sc->args)));
+        set_caddr(sc->args, cons_unchecked(sc, lookup_checked(sc, settee), caddr(sc->args)));
       else
-	{
-	  if (is_pair(settee))
-	    {
-	      push_stack_direct(sc, OP_LET_TEMP_INIT1);
-	      sc->code = settee;
-	      return(true);
-	    }
-	  set_caddr(sc->args, cons_unchecked(sc, new_value, caddr(sc->args)));
-	}}
+        {
+          if (is_pair(settee))
+            {
+              push_stack_direct(sc, OP_LET_TEMP_INIT1);
+              sc->code = settee;
+              return(true);
+            }
+          set_caddr(sc->args, cons_unchecked(sc, new_value, caddr(sc->args)));
+        }}
   set_car(sc->args, cadr(sc->args));
   return(false);
 }
 
 typedef enum {goto_start, goto_begin, fall_through, goto_do_end_clauses, goto_safe_do_end_clauses,
-	      goto_eval, goto_apply_lambda, goto_do_end, goto_top_no_pop, goto_apply,
-	      goto_eval_args, goto_eval_args_top, goto_do_unchecked, goto_pop_read_list,
-	      goto_read_tok, goto_feed_to, goto_set_unchecked, goto_unopt} goto_t;
+              goto_eval, goto_apply_lambda, goto_do_end, goto_top_no_pop, goto_apply,
+              goto_eval_args, goto_eval_args_top, goto_do_unchecked, goto_pop_read_list,
+              goto_read_tok, goto_feed_to, goto_set_unchecked, goto_unopt} goto_t;
 
 static goto_t op_let_temp_init2(s7_scheme *sc)
 {
@@ -77691,25 +77691,25 @@ static goto_t op_let_temp_init2(s7_scheme *sc)
       set_car(p, cdar(p));
       set_car(sc->args, cdar(sc->args));
       if ((!is_symbol(settee)) || (is_pair(new_value)))
-	{
-	  if (is_symbol(settee))
-	    {
-	      push_stack_direct(sc, OP_LET_TEMP_INIT2);          /* (let-temporarily (((*s7* 'print-length) 32)) ...) */
-	      push_stack_no_args(sc, OP_SET_FROM_LET_TEMP, settee);
-	      sc->code = new_value;
-	      return(goto_eval);
-	    }
-	  sc->code = set_plist_3(sc, sc->set_symbol, settee, new_value);
-	  push_stack_direct(sc, OP_LET_TEMP_INIT2);
-	  return(goto_set_unchecked);
-	}
+        {
+          if (is_symbol(settee))
+            {
+              push_stack_direct(sc, OP_LET_TEMP_INIT2);          /* (let-temporarily (((*s7* 'print-length) 32)) ...) */
+              push_stack_no_args(sc, OP_SET_FROM_LET_TEMP, settee);
+              sc->code = new_value;
+              return(goto_eval);
+            }
+          sc->code = set_plist_3(sc, sc->set_symbol, settee, new_value);
+          push_stack_direct(sc, OP_LET_TEMP_INIT2);
+          return(goto_set_unchecked);
+        }
       slot = s7_slot(sc, settee);
       if (!is_slot(slot))
-	unbound_variable_error_nr(sc, settee);
+        unbound_variable_error_nr(sc, settee);
       if (is_immutable_slot(slot))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_temporarily_symbol, settee));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_temporarily_symbol, settee));
       if (is_symbol(new_value))
-	new_value = lookup_checked(sc, new_value);
+        new_value = lookup_checked(sc, new_value);
       slot_set_value(slot, (slot_has_setter(slot)) ? call_setter(sc, slot, new_value) : new_value);
     }
   set_car(sc->args, cadr(sc->args));
@@ -77735,31 +77735,31 @@ static bool op_let_temp_done1(s7_scheme *sc)
       set_car(sc->args, cdar(sc->args));
 
       if ((is_pair(settee)) && (car(settee) == sc->s7_starlet_symbol) &&  /* (let-temporarily (((*s7* (symbol "print-length")) 43))...) */
-	  ((is_symbol_and_keyword(cadr(settee))) ||
-	   (is_quoted_symbol(cadr(settee)))))
-	{
-	  s7_pointer sym = cadr(settee);
-	  if (is_pair(sym)) sym = cadr(sym);
-	  s7_starlet_set_1(sc, T_Sym(sym), sc->value);
-	}
+          ((is_symbol_and_keyword(cadr(settee))) ||
+           (is_quoted_symbol(cadr(settee)))))
+        {
+          s7_pointer sym = cadr(settee);
+          if (is_pair(sym)) sym = cadr(sym);
+          s7_starlet_set_1(sc, T_Sym(sym), sc->value);
+        }
       else
-	{
-	  s7_pointer slot;
-	  if (!is_symbol(settee))
-	    {
-	      push_stack_direct(sc, OP_LET_TEMP_DONE1); /* save args and (pending) body value==sc->code */
-	      if ((is_pair(sc->value)) || (is_symbol(sc->value)))
-		sc->code = set_plist_3(sc, sc->set_symbol, settee, set_plist_2(sc, sc->quote_function, sc->value));
-	      else sc->code = set_plist_3(sc, sc->set_symbol, settee, sc->value);
-	      return(false); /* goto set_unchecked */
-	    }
-	  slot = s7_slot(sc, settee);
-	  if (is_immutable_slot(slot))
-	    immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_temporarily_symbol, settee));
-	  if (slot_has_setter(slot))             /* maybe setter changed in let-temp body? else setter has already checked the init value */
-	    slot_set_value(slot, call_setter(sc, slot, sc->value));
-	  else slot_set_value(slot, sc->value);
-	}}
+        {
+          s7_pointer slot;
+          if (!is_symbol(settee))
+            {
+              push_stack_direct(sc, OP_LET_TEMP_DONE1); /* save args and (pending) body value==sc->code */
+              if ((is_pair(sc->value)) || (is_symbol(sc->value)))
+                sc->code = set_plist_3(sc, sc->set_symbol, settee, set_plist_2(sc, sc->quote_function, sc->value));
+              else sc->code = set_plist_3(sc, sc->set_symbol, settee, sc->value);
+              return(false); /* goto set_unchecked */
+            }
+          slot = s7_slot(sc, settee);
+          if (is_immutable_slot(slot))
+            immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_temporarily_symbol, settee));
+          if (slot_has_setter(slot))             /* maybe setter changed in let-temp body? else setter has already checked the init value */
+            slot_set_value(slot, call_setter(sc, slot, sc->value));
+          else slot_set_value(slot, sc->value);
+        }}
   pop_stack(sc); /* not unstack */
   sc->value = sc->code;
   if (is_multiple_value(sc->value))
@@ -77777,7 +77777,7 @@ static bool op_let_temp_s7(s7_scheme *sc) /* all entries are of the form ((*s7*
     {
       s7_pointer old_value, field = cadadr(caar(p)); /* p: (((*s7* 'expansions?) #f)) -- no keywords here (see check_let_temporarily) */
       if (s7_starlet_immutable_field[s7_starlet_symbol(field)])
-	immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "let-temporarily: can't set! (*s7* '~S)", 38), field));
+        immutable_object_error_nr(sc, set_elist_2(sc, wrap_string(sc, "let-temporarily: can't set! (*s7* '~S)", 38), field));
       old_value = s7_starlet(sc, s7_starlet_symbol(field));
       push_stack(sc, OP_LET_TEMP_S7_UNWIND, old_value, field);
     }
@@ -77851,9 +77851,9 @@ static bool op_let_temp_na(s7_scheme *sc) /* all entries are of the form (symbol
       s7_pointer settee = car(var);
       slot = s7_slot(sc, settee);
       if (!is_slot(slot))
-	unbound_variable_error_nr(sc, settee);
+        unbound_variable_error_nr(sc, settee);
       if (is_immutable_slot(slot))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_temporarily_symbol, settee));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->let_temporarily_symbol, settee));
       push_stack(sc, OP_LET_TEMP_UNWIND, slot_value(slot), slot);
     }
   for (p = car(sc->code); is_pair(p); p = cdr(p), end += 4)
@@ -77862,7 +77862,7 @@ static bool op_let_temp_na(s7_scheme *sc) /* all entries are of the form (symbol
       s7_pointer new_val = fx_call(sc, cdr(var));
       slot = end[0];
       if (slot_has_setter(slot))
-	slot_set_value(slot, call_setter(sc, slot, new_val)); /* s7_apply_function(sc, slot_setter(slot), set_plist_2(sc, settee, new_val))); */
+        slot_set_value(slot, call_setter(sc, slot, new_val)); /* s7_apply_function(sc, slot_setter(slot), set_plist_2(sc, settee, new_val))); */
       else slot_set_value(slot, new_val);
     }
   sc->code = cdr(sc->code);
@@ -77928,7 +77928,7 @@ static inline s7_pointer check_quote(s7_scheme *sc, s7_pointer code)
   if (!is_pair(cdr(code)))                    /* (quote . -1) */
     {
       if (is_null(cdr(code)))
-	syntax_error_nr(sc, "quote: not enough arguments: ~A", 31, code);
+        syntax_error_nr(sc, "quote: not enough arguments: ~A", 31, code);
       syntax_error_nr(sc, "quote: stray dot?: ~A", 21, code);
     }
   if (is_not_null(cddr(code)))             /* (quote . (1 2)) or (quote 1 1) */
@@ -77963,27 +77963,27 @@ static bool check_and(s7_scheme *sc, s7_pointer expr)
       (is_proper_list_1(sc, cdr(code))))
     {
       if ((fx_proc(code) == fx_is_pair_s) || (fx_proc(code) == fx_is_pair_t))
-	{
-	  pair_set_syntax_op(expr, OP_AND_PAIR_P);
-	  set_opt3_sym(expr, cadar(code));
-	  set_opt2_con(expr, cadr(code));
-	}
+        {
+          pair_set_syntax_op(expr, OP_AND_PAIR_P);
+          set_opt3_sym(expr, cadar(code));
+          set_opt2_con(expr, cadr(code));
+        }
       else pair_set_syntax_op(expr, (any_nils > 0) ? OP_AND_AP : OP_AND_2A);
     }
   else
     {
       pair_set_syntax_op(expr, (any_nils > 0) ? OP_AND_P : OP_AND_N);
       if ((any_nils == 1) && (len > 2))
-	{
-	  if (!has_fx(code))
-	    pair_set_syntax_op(expr, OP_AND_SAFE_P1);
-	  else
-	    if (!has_fx(cdr(code)))
-	      pair_set_syntax_op(expr, OP_AND_SAFE_P2);
-	    else
-	      if ((!has_fx(cddr(code))) && (len == 3))
-		pair_set_syntax_op(expr, OP_AND_SAFE_P3);
-	}}
+        {
+          if (!has_fx(code))
+            pair_set_syntax_op(expr, OP_AND_SAFE_P1);
+          else
+            if (!has_fx(cdr(code)))
+              pair_set_syntax_op(expr, OP_AND_SAFE_P2);
+            else
+              if ((!has_fx(cddr(code))) && (len == 3))
+                pair_set_syntax_op(expr, OP_AND_SAFE_P3);
+        }}
   if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
   set_current_code(sc, sc->code);
   return(false);
@@ -78087,12 +78087,12 @@ static void fb_if_annotate(s7_scheme *sc, s7_pointer code, s7_pointer form)
   if (optimize_op(form) == OP_IF_A_P)
     {
       if (is_fxable(sc, cadr(code)))
-	{
-	  pair_set_syntax_op(form, OP_IF_A_A);
-	  fx_annotate_arg(sc, cdr(code), sc->curlet);
-	  set_opt1_pair(form, cdr(code));
-	  fb_annotate(sc, form, code, OP_IF_B_A);
-	}
+        {
+          pair_set_syntax_op(form, OP_IF_A_A);
+          fx_annotate_arg(sc, cdr(code), sc->curlet);
+          set_opt1_pair(form, cdr(code));
+          fb_annotate(sc, form, code, OP_IF_B_A);
+        }
       else fb_annotate(sc, form, code, OP_IF_B_P);
     }
   if (optimize_op(form) == OP_IF_A_R)
@@ -78102,29 +78102,29 @@ static void fb_if_annotate(s7_scheme *sc, s7_pointer code, s7_pointer form)
   if (optimize_op(form) == OP_IF_A_P_P)
     {
       if (is_fxable(sc, cadr(code)))
-	{
-	  set_opt1_pair(form, cdr(code));
-	  if (is_fxable(sc, caddr(code)))
-	    {
-	      pair_set_syntax_op(form, OP_IF_A_A_A); /* b_a_a never happens? */
-	      set_opt2_pair(form, cddr(code));
-	    }
-	  else
-	    {
-	      pair_set_syntax_op(form, OP_IF_A_A_P);
-	      fb_annotate(sc, form, code, OP_IF_B_A_P);
-	    }
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	}
+        {
+          set_opt1_pair(form, cdr(code));
+          if (is_fxable(sc, caddr(code)))
+            {
+              pair_set_syntax_op(form, OP_IF_A_A_A); /* b_a_a never happens? */
+              set_opt2_pair(form, cddr(code));
+            }
+          else
+            {
+              pair_set_syntax_op(form, OP_IF_A_A_P);
+              fb_annotate(sc, form, code, OP_IF_B_A_P);
+            }
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+        }
       else
-	if (is_fxable(sc, caddr(code)))
-	  {
-	    pair_set_syntax_op(form, OP_IF_A_P_A);
-	    fx_annotate_args(sc, cdr(code), sc->curlet);
-	    set_opt2_pair(form, cddr(code));
-	    fb_annotate(sc, form, code, OP_IF_B_P_A);
-	  }
-	else fb_annotate(sc, form, code, OP_IF_B_P_P);
+        if (is_fxable(sc, caddr(code)))
+          {
+            pair_set_syntax_op(form, OP_IF_A_P_A);
+            fx_annotate_args(sc, cdr(code), sc->curlet);
+            set_opt2_pair(form, cddr(code));
+            fb_annotate(sc, form, code, OP_IF_B_P_A);
+          }
+        else fb_annotate(sc, form, code, OP_IF_B_P_P);
     }
 }
 
@@ -78154,169 +78154,169 @@ static void set_if_opts(s7_scheme *sc, s7_pointer form, bool one_branch, bool re
   if (is_pair(test))
     {
       if (is_optimized(test))
-	{
-	  if (is_h_safe_c_nc(test)) /* replace these with fx_and* */
-	    {
-	      pair_set_syntax_op(form, choose_if_optc(IF_A, one_branch, reversed, not_case));
-	      if (not_case)
-		{
-		  set_fx(cdar(code), fx_choose(sc, cdar(code), sc->curlet, let_symbol_is_safe));
-		  if (!reversed) set_opt3_pair(form, cdadr(form));
-		}
-	      else set_fx(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
-	      if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
-	      fb_if_annotate(sc, code, form);
-	      return;
-	    }
-	  if ((is_h_safe_c_s(test)) &&
-	      (is_symbol(car(test))))
-	    {
-	      uint8_t typ = symbol_type(car(test));
-	      if (typ > 0)
-		{
-		  pair_set_syntax_op(form, choose_if_optc(IF_IS_TYPE_S, one_branch, reversed, not_case));
-		  set_opt3_byte(code, typ);
-		  if (optimize_op(form) == OP_IF_IS_TYPE_S_P_P)
-		    {
-		      if (is_fxable(sc, caddr(code)))
-			{
-			  set_opt2_pair(form, cddr(code));
-			  if (is_fxable(sc, cadr(code)))
-			    {
-			      set_opt1_pair(form, cdr(code));
-			      fx_annotate_args(sc, cdr(code), sc->curlet);
-			      pair_set_syntax_op(form, OP_IF_IS_TYPE_S_A_A);
-			    }
-			  else
-			    {
-			      set_opt1_any(form, cadr(code));
-			      pair_set_syntax_op(form, OP_IF_IS_TYPE_S_P_A);
-			      fx_annotate_arg(sc, cddr(code), sc->curlet);
-			    }
-			  if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
-			}
-		      else
-			if (is_fxable(sc, cadr(code)))
-			  {
-			    set_opt2_any(form, caddr(code));
-			    set_opt1_pair(form, cdr(code));
-			    fx_annotate_arg(sc, cdr(code), sc->curlet);
-			    pair_set_syntax_op(form, OP_IF_IS_TYPE_S_A_P);
-			    if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
-			  }}}
-	      else
-		{
-		  pair_set_syntax_op(form, choose_if_optc(IF_opSq, one_branch, reversed, not_case));
-		  if (not_case) set_opt1_pair(code, cadar(code)); /* code is cdr(if...): ((not (f sym)) ...) */
-		}
-	      clear_has_fx(code);
-	      set_opt2_sym(code, cadr(test));
-	      return;
-	    }
-	  if (is_fxable(sc, test))
-	    {
-	      if ((optimize_op(test) == OP_OR_2A) || (optimize_op(test) == OP_AND_2A))
-		{
-		  if (optimize_op(test) == OP_OR_2A)
-		    pair_set_syntax_op(form, choose_if_optc(IF_OR2, one_branch, reversed, not_case));
-		  else pair_set_syntax_op(form, choose_if_optc(IF_AND2, one_branch, reversed, not_case));
-		  clear_has_fx(code);
-		  set_opt2_pair(code, cdr(test));
-		  set_opt3_pair(code, cddr(test));
-		  return;
-		}
-	      if (optimize_op(test) == OP_AND_3A)
-		{
-		  pair_set_syntax_op(form, choose_if_optc(IF_AND3, one_branch, reversed, not_case));
-		  clear_has_fx(code);
-		  set_opt2_pair(code, cdr(test));
-		  set_opt3_pair(code, cddr(test));
-		  set_opt1_pair(code, cdddr(test));
-		  return;
-		}
-
-	      pair_set_syntax_op(form, choose_if_optc(IF_A, one_branch, reversed, not_case));
-	      if (not_case)
-		{
-		  set_fx_direct(cdar(code), fx_choose(sc, cdar(code), sc->curlet, let_symbol_is_safe));
-		  if (!reversed) set_opt3_pair(form, cdadr(form));
-		}
-	      else set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
-	      fb_if_annotate(sc, code, form);
-	    }
-	  else
-	    {
-	      pair_set_syntax_op(form, choose_if_optc(IF_P, one_branch, reversed, not_case));
-	      set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
-	      set_opt3_any(code, (not_case) ? cadar(code) : car(code));
-	    }
-	  if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet))))
-	    fx_curlet_tree(sc, code);
-	}
+        {
+          if (is_h_safe_c_nc(test)) /* replace these with fx_and* */
+            {
+              pair_set_syntax_op(form, choose_if_optc(IF_A, one_branch, reversed, not_case));
+              if (not_case)
+                {
+                  set_fx(cdar(code), fx_choose(sc, cdar(code), sc->curlet, let_symbol_is_safe));
+                  if (!reversed) set_opt3_pair(form, cdadr(form));
+                }
+              else set_fx(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
+              if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
+              fb_if_annotate(sc, code, form);
+              return;
+            }
+          if ((is_h_safe_c_s(test)) &&
+              (is_symbol(car(test))))
+            {
+              uint8_t typ = symbol_type(car(test));
+              if (typ > 0)
+                {
+                  pair_set_syntax_op(form, choose_if_optc(IF_IS_TYPE_S, one_branch, reversed, not_case));
+                  set_opt3_byte(code, typ);
+                  if (optimize_op(form) == OP_IF_IS_TYPE_S_P_P)
+                    {
+                      if (is_fxable(sc, caddr(code)))
+                        {
+                          set_opt2_pair(form, cddr(code));
+                          if (is_fxable(sc, cadr(code)))
+                            {
+                              set_opt1_pair(form, cdr(code));
+                              fx_annotate_args(sc, cdr(code), sc->curlet);
+                              pair_set_syntax_op(form, OP_IF_IS_TYPE_S_A_A);
+                            }
+                          else
+                            {
+                              set_opt1_any(form, cadr(code));
+                              pair_set_syntax_op(form, OP_IF_IS_TYPE_S_P_A);
+                              fx_annotate_arg(sc, cddr(code), sc->curlet);
+                            }
+                          if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
+                        }
+                      else
+                        if (is_fxable(sc, cadr(code)))
+                          {
+                            set_opt2_any(form, caddr(code));
+                            set_opt1_pair(form, cdr(code));
+                            fx_annotate_arg(sc, cdr(code), sc->curlet);
+                            pair_set_syntax_op(form, OP_IF_IS_TYPE_S_A_P);
+                            if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
+                          }}}
+              else
+                {
+                  pair_set_syntax_op(form, choose_if_optc(IF_opSq, one_branch, reversed, not_case));
+                  if (not_case) set_opt1_pair(code, cadar(code)); /* code is cdr(if...): ((not (f sym)) ...) */
+                }
+              clear_has_fx(code);
+              set_opt2_sym(code, cadr(test));
+              return;
+            }
+          if (is_fxable(sc, test))
+            {
+              if ((optimize_op(test) == OP_OR_2A) || (optimize_op(test) == OP_AND_2A))
+                {
+                  if (optimize_op(test) == OP_OR_2A)
+                    pair_set_syntax_op(form, choose_if_optc(IF_OR2, one_branch, reversed, not_case));
+                  else pair_set_syntax_op(form, choose_if_optc(IF_AND2, one_branch, reversed, not_case));
+                  clear_has_fx(code);
+                  set_opt2_pair(code, cdr(test));
+                  set_opt3_pair(code, cddr(test));
+                  return;
+                }
+              if (optimize_op(test) == OP_AND_3A)
+                {
+                  pair_set_syntax_op(form, choose_if_optc(IF_AND3, one_branch, reversed, not_case));
+                  clear_has_fx(code);
+                  set_opt2_pair(code, cdr(test));
+                  set_opt3_pair(code, cddr(test));
+                  set_opt1_pair(code, cdddr(test));
+                  return;
+                }
+
+              pair_set_syntax_op(form, choose_if_optc(IF_A, one_branch, reversed, not_case));
+              if (not_case)
+                {
+                  set_fx_direct(cdar(code), fx_choose(sc, cdar(code), sc->curlet, let_symbol_is_safe));
+                  if (!reversed) set_opt3_pair(form, cdadr(form));
+                }
+              else set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
+              fb_if_annotate(sc, code, form);
+            }
+          else
+            {
+              pair_set_syntax_op(form, choose_if_optc(IF_P, one_branch, reversed, not_case));
+              set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
+              set_opt3_any(code, (not_case) ? cadar(code) : car(code));
+            }
+          if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet))))
+            fx_curlet_tree(sc, code);
+        }
       else
-	{
-	  pair_set_syntax_op(form, choose_if_optc(IF_P, one_branch, reversed, not_case));
-	  clear_has_fx(code);
-	  set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
-	  set_opt3_any(code, (not_case) ? cadar(code) : car(code));
-	  if (is_symbol_and_syntactic(car(test)))
-	    {
-	      pair_set_syntax_op(test, symbol_syntax_op_checked(test));
-	      if ((symbol_syntax_op(car(test)) == OP_AND) ||
-		  (symbol_syntax_op(car(test)) == OP_OR))
-		{
-		  opcode_t new_op;
-		  if (symbol_syntax_op(car(test)) == OP_AND)
-		    check_and(sc, test);
-		  else check_or(sc, test);
-		  new_op = symbol_syntax_op_checked(test);
-		  if ((new_op == OP_AND_P) || (new_op == OP_AND_AP) || (new_op == OP_AND_PAIR_P) ||
-		      (new_op == OP_AND_N) || (new_op == OP_AND_SAFE_P1) || (new_op == OP_AND_SAFE_P2) || (new_op == OP_AND_SAFE_P3))
-		    {
-		      pair_set_syntax_op(form, choose_if_optc(IF_ANDP, one_branch, reversed, not_case));
-		      set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
-		      set_opt3_pair(code, (not_case) ? cdadar(code) : cdar(code));
-		    }
-		  else
-		    if ((new_op == OP_OR_P) || (new_op == OP_OR_AP))
-		      {
-			pair_set_syntax_op(form, choose_if_optc(IF_ORP, one_branch, reversed, not_case));
-			set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
-			set_opt3_pair(code, (not_case) ? cdadar(code) : cdar(code));
-		      }}}}}
+        {
+          pair_set_syntax_op(form, choose_if_optc(IF_P, one_branch, reversed, not_case));
+          clear_has_fx(code);
+          set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
+          set_opt3_any(code, (not_case) ? cadar(code) : car(code));
+          if (is_symbol_and_syntactic(car(test)))
+            {
+              pair_set_syntax_op(test, symbol_syntax_op_checked(test));
+              if ((symbol_syntax_op(car(test)) == OP_AND) ||
+                  (symbol_syntax_op(car(test)) == OP_OR))
+                {
+                  opcode_t new_op;
+                  if (symbol_syntax_op(car(test)) == OP_AND)
+                    check_and(sc, test);
+                  else check_or(sc, test);
+                  new_op = symbol_syntax_op_checked(test);
+                  if ((new_op == OP_AND_P) || (new_op == OP_AND_AP) || (new_op == OP_AND_PAIR_P) ||
+                      (new_op == OP_AND_N) || (new_op == OP_AND_SAFE_P1) || (new_op == OP_AND_SAFE_P2) || (new_op == OP_AND_SAFE_P3))
+                    {
+                      pair_set_syntax_op(form, choose_if_optc(IF_ANDP, one_branch, reversed, not_case));
+                      set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
+                      set_opt3_pair(code, (not_case) ? cdadar(code) : cdar(code));
+                    }
+                  else
+                    if ((new_op == OP_OR_P) || (new_op == OP_OR_AP))
+                      {
+                        pair_set_syntax_op(form, choose_if_optc(IF_ORP, one_branch, reversed, not_case));
+                        set_opt2_any(code, (one_branch) ? cadr(code) : cdr(code));
+                        set_opt3_pair(code, (not_case) ? cdadar(code) : cdar(code));
+                      }}}}}
   else /* test is symbol or constant, but constant here is nutty */
     if (is_safe_symbol(test))
       {
-	pair_set_syntax_op(form, choose_if_optc(IF_S, one_branch, reversed, not_case));
-	if (not_case) set_opt1_sym(code, cadar(code)); /* code is cdr(if...): ((not sym) ...) */
-	if (optimize_op(form) == OP_IF_S_P_P)
-	  {
-	    if (is_fxable(sc, caddr(code)))
-	      {
-		if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
-		set_opt2_pair(form, cddr(code)); /* opt1_any set above to cadr(code) */
-		if (is_fxable(sc, cadr(code)))
-		  {
-		    pair_set_syntax_op(form, OP_IF_S_A_A);
-		    fx_annotate_args(sc, cdr(code), sc->curlet);
-		    set_opt1_pair(form, cdr(code));
-		  }
-		else
-		  {
-		    pair_set_syntax_op(form, OP_IF_S_P_A);
-		    fx_annotate_arg(sc, cddr(code), sc->curlet);
-		  }
-		if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
-	      }
-	    else
-	      if (is_fxable(sc, cadr(code)))
-		{
-		  pair_set_syntax_op(form, OP_IF_S_A_P);
-		  fx_annotate_arg(sc, cdr(code), sc->curlet);
-		  if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
-		  set_opt1_pair(form, cdr(code));
-		  set_opt2_any(form, caddr(code));
-		}}}
+        pair_set_syntax_op(form, choose_if_optc(IF_S, one_branch, reversed, not_case));
+        if (not_case) set_opt1_sym(code, cadar(code)); /* code is cdr(if...): ((not sym) ...) */
+        if (optimize_op(form) == OP_IF_S_P_P)
+          {
+            if (is_fxable(sc, caddr(code)))
+              {
+                if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
+                set_opt2_pair(form, cddr(code)); /* opt1_any set above to cadr(code) */
+                if (is_fxable(sc, cadr(code)))
+                  {
+                    pair_set_syntax_op(form, OP_IF_S_A_A);
+                    fx_annotate_args(sc, cdr(code), sc->curlet);
+                    set_opt1_pair(form, cdr(code));
+                  }
+                else
+                  {
+                    pair_set_syntax_op(form, OP_IF_S_P_A);
+                    fx_annotate_arg(sc, cddr(code), sc->curlet);
+                  }
+                if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
+              }
+            else
+              if (is_fxable(sc, cadr(code)))
+                {
+                  pair_set_syntax_op(form, OP_IF_S_A_P);
+                  fx_annotate_arg(sc, cdr(code), sc->curlet);
+                  if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
+                  set_opt1_pair(form, cdr(code));
+                  set_opt2_any(form, caddr(code));
+                }}}
 }
 
 /* (cond <> (else <>)) only happens in old-fashioned code, so set_if_opts covers if/when/unless but not cond */
@@ -78331,14 +78331,14 @@ static s7_pointer check_if(s7_scheme *sc, s7_pointer form)
   if (!is_pair(cdr_code))                            /* (if 1) */
     {
       if (is_null(cdr(code)))
-	syntax_error_nr(sc, "~S: if needs another clause", 27, form);
+        syntax_error_nr(sc, "~S: if needs another clause", 27, form);
       syntax_error_nr(sc, "~S: stray dot?", 14, form);    /* (if 1 . 2) */
     }
 
   if (is_pair(cdr(cdr_code)))
     {
       if (is_not_null(cddr(cdr_code)))               /* (if 1 2 3 4) */
-	syntax_error_nr(sc, "too many clauses for if: ~A", 27, form);
+        syntax_error_nr(sc, "too many clauses for if: ~A", 27, form);
     }
   else
     if (is_not_null(cdr(cdr_code)))                  /* (if 1 2 . 3) */
@@ -78393,36 +78393,36 @@ static void check_when(s7_scheme *sc)
     {
       s7_pointer test = car(code);
       if (is_safe_symbol(test))
-	{
-	  pair_set_syntax_op(form, OP_WHEN_S);
-	  set_opt2_con(form, cadr(code));
-	  set_opt3_pair(form, cddr(code));
-	}
+        {
+          pair_set_syntax_op(form, OP_WHEN_S);
+          set_opt2_con(form, cadr(code));
+          set_opt3_pair(form, cddr(code));
+        }
       else
-	/* fxable body doesn't happen very often -- a dozen or so hits in the standard tests */
-	if (is_fxable(sc, test))
-	  {
-	    pair_set_syntax_op(form, OP_WHEN_A);
-	    if (is_pair(car(code))) set_opt2_pair(form, cdar(code));
-	    set_opt3_pair(form, cdr(code));
-	    set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe)); /* "A" in when_a */
-
-	    if (fx_proc(code) == fx_and_2a)
-	      pair_set_syntax_op(form, OP_WHEN_AND_2A);
-	    else
-	      if (fx_proc(code) == fx_and_3a)
-		pair_set_syntax_op(form, OP_WHEN_AND_3A);
-	  }
-	else
-	  if ((is_pair(test)) && (car(test) == sc->and_symbol))
-	    {
-	      opcode_t new_op;
-	      pair_set_syntax_op(test, symbol_syntax_op_checked(test));
-	      check_and(sc, test);
-	      new_op = symbol_syntax_op_checked(test);
-	      if (new_op == OP_AND_AP)
-		pair_set_syntax_op(form, OP_WHEN_AND_AP);
-	    }}
+        /* fxable body doesn't happen very often -- a dozen or so hits in the standard tests */
+        if (is_fxable(sc, test))
+          {
+            pair_set_syntax_op(form, OP_WHEN_A);
+            if (is_pair(car(code))) set_opt2_pair(form, cdar(code));
+            set_opt3_pair(form, cdr(code));
+            set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe)); /* "A" in when_a */
+
+            if (fx_proc(code) == fx_and_2a)
+              pair_set_syntax_op(form, OP_WHEN_AND_2A);
+            else
+              if (fx_proc(code) == fx_and_3a)
+                pair_set_syntax_op(form, OP_WHEN_AND_3A);
+          }
+        else
+          if ((is_pair(test)) && (car(test) == sc->and_symbol))
+            {
+              opcode_t new_op;
+              pair_set_syntax_op(test, symbol_syntax_op_checked(test));
+              check_and(sc, test);
+              new_op = symbol_syntax_op_checked(test);
+              if (new_op == OP_AND_AP)
+                pair_set_syntax_op(form, OP_WHEN_AND_AP);
+            }}
   push_stack_no_args(sc, OP_WHEN_PP, cdr(code));
   set_current_code(sc, sc->code);
   sc->code = car(code);
@@ -78527,18 +78527,18 @@ static void check_unless(s7_scheme *sc)
   else
     if (is_safe_symbol(car(code)))
       {
-	pair_set_syntax_op(form, OP_UNLESS_S);
-	set_opt2_con(form, cadr(code));
-	set_opt3_pair(form, cddr(code));
+        pair_set_syntax_op(form, OP_UNLESS_S);
+        set_opt2_con(form, cadr(code));
+        set_opt3_pair(form, cddr(code));
       }
     else
       if (is_fxable(sc, car(code)))
-	{
-	  pair_set_syntax_op(form, OP_UNLESS_A);
-	  set_opt2_con(form, cadr(code));
-	  set_opt3_pair(form, cddr(code));
-	  set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
-	}
+        {
+          pair_set_syntax_op(form, OP_UNLESS_A);
+          set_opt2_con(form, cadr(code));
+          set_opt3_pair(form, cddr(code));
+          set_fx_direct(code, fx_choose(sc, code, sc->curlet, let_symbol_is_safe));
+        }
   push_stack_no_args(sc, OP_UNLESS_PP, cdr(code));
   set_current_code(sc, sc->code);
   sc->code = car(code);
@@ -78635,63 +78635,63 @@ static void check_define(s7_scheme *sc)
   if (!is_pair(cdr(code)))
     {
       if (is_null(cdr(code)))
-	syntax_error_with_caller_nr(sc, "~A: no value? ~A", 16, caller, sc->code);  /* (define var) */
+        syntax_error_with_caller_nr(sc, "~A: no value? ~A", 16, caller, sc->code);  /* (define var) */
       syntax_error_with_caller_nr(sc, "~A: stray dot? ~A", 17, caller, sc->code);   /* (define var . 1) */
     }
   if (!is_pair(car(code)))
     {
       if (is_not_null(cddr(code)))                                               /* (define var 1 . 2) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "~A: more than one value? ~A", 27), caller, print_truncate(sc, sc->code)));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "~A: more than one value? ~A", 27), caller, print_truncate(sc, sc->code)));
       if (starred)
-	syntax_error_nr(sc, "define* is restricted to functions: ~S", 38, sc->code);
+        syntax_error_nr(sc, "define* is restricted to functions: ~S", 38, sc->code);
 
       func = car(code);
       if (!is_symbol(func))                                                      /* (define 3 a) */
-	syntax_error_with_caller2_nr(sc, "~A: can't define ~W (~A); it should be a symbol", 47, caller, func, object_type_name(sc, func));
+        syntax_error_with_caller2_nr(sc, "~A: can't define ~W (~A); it should be a symbol", 47, caller, func, object_type_name(sc, func));
       if (is_keyword(func))                                                      /* (define :hi 1) */
-	syntax_error_with_caller_nr(sc, "~A ~A: keywords are constants", 29, caller, func);
+        syntax_error_with_caller_nr(sc, "~A ~A: keywords are constants", 29, caller, func);
       if (is_syntactic_symbol(func))                                             /* (define and a) */
-	{
-	  if (sc->safety > NO_SAFETY)
-	    s7_warn(sc, 256, "%s: syntactic keywords tend to behave badly if redefined: %s\n", display(func), display_truncated(sc->code));
-	  set_local(func);
-	}
+        {
+          if (sc->safety > NO_SAFETY)
+            s7_warn(sc, 256, "%s: syntactic keywords tend to behave badly if redefined: %s\n", display(func), display_truncated(sc->code));
+          set_local(func);
+        }
 
       if ((is_pair(cadr(code))) &&               /* look for (define sym (lambda ...)) and treat it like (define (sym ...)...) */
-	  ((caadr(code) == sc->lambda_symbol) ||
-	   (caadr(code) == sc->lambda_star_symbol)) &&
-	  (symbol_id(caadr(code)) == 0))
-	{
-	  if ((is_global(func)) && (is_slot(global_slot(func))) && (is_immutable(global_slot(func))) && (is_slot(initial_slot(func))))
-	    immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't ~A ~S: it is immutable", 28), caller, func));
-
-	  /* not is_global here because that bit might not be set for initial symbols (why not? -- redef as method etc) */
-	  if (!is_pair(cdadr(code)))                                             /* (define x (lambda . 1)) */
-	    syntax_error_with_caller_nr(sc, "~A: stray dot? ~A", 17, caller, sc->code);
-	  if (!is_pair(cddr(cadr(code))))                                        /* (define f (lambda (arg))) */
-	    syntax_error_with_caller_nr(sc, "~A: no body: ~A", 15, caller, sc->code);
-	  if (caadr(code) == sc->lambda_star_symbol)
-	    check_lambda_star_args(sc, cadadr(code), cddr(cadr(code)), cadr(code));
-	  else check_lambda_args(sc, cadadr(code), NULL, cadr(code));
-	  optimize_lambda(sc, caadr(code) == sc->lambda_symbol, func, cadadr(code), cddr(cadr(code)));
-	}}
+          ((caadr(code) == sc->lambda_symbol) ||
+           (caadr(code) == sc->lambda_star_symbol)) &&
+          (symbol_id(caadr(code)) == 0))
+        {
+          if ((is_global(func)) && (is_slot(global_slot(func))) && (is_immutable(global_slot(func))) && (is_slot(initial_slot(func))))
+            immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't ~A ~S: it is immutable", 28), caller, func));
+
+          /* not is_global here because that bit might not be set for initial symbols (why not? -- redef as method etc) */
+          if (!is_pair(cdadr(code)))                                             /* (define x (lambda . 1)) */
+            syntax_error_with_caller_nr(sc, "~A: stray dot? ~A", 17, caller, sc->code);
+          if (!is_pair(cddr(cadr(code))))                                        /* (define f (lambda (arg))) */
+            syntax_error_with_caller_nr(sc, "~A: no body: ~A", 15, caller, sc->code);
+          if (caadr(code) == sc->lambda_star_symbol)
+            check_lambda_star_args(sc, cadadr(code), cddr(cadr(code)), cadr(code));
+          else check_lambda_args(sc, cadadr(code), NULL, cadr(code));
+          optimize_lambda(sc, caadr(code) == sc->lambda_symbol, func, cadadr(code), cddr(cadr(code)));
+        }}
   else
     {
       func = caar(code);
       if (!is_symbol(func))                                                      /* (define (3 a) a) */
-	syntax_error_with_caller2_nr(sc, "~A: can't define ~S, ~A (should be a symbol)", 44, caller, func, object_type_name(sc, func));
+        syntax_error_with_caller2_nr(sc, "~A: can't define ~S, ~A (should be a symbol)", 44, caller, func, object_type_name(sc, func));
       if (is_syntactic_symbol(func))                                             /* (define (and a) a) */
-	{
-	  if (sc->safety > NO_SAFETY)
-	    s7_warn(sc, 256, "%s: syntactic keywords tend to behave badly if redefined: %s\n", display(func), display_truncated(sc->code));
-	  set_local(func);
-	}
+        {
+          if (sc->safety > NO_SAFETY)
+            s7_warn(sc, 256, "%s: syntactic keywords tend to behave badly if redefined: %s\n", display(func), display_truncated(sc->code));
+          set_local(func);
+        }
       if ((is_global(func)) && (is_slot(global_slot(func))) &&
-	  (is_immutable(global_slot(func))) && (is_slot(initial_slot(func))))     /* (define (abs x) 1) after (immutable! abs) */
-	immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't ~A ~S: it is immutable", 28), caller, func));
+          (is_immutable(global_slot(func))) && (is_slot(initial_slot(func))))     /* (define (abs x) 1) after (immutable! abs) */
+        immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "can't ~A ~S: it is immutable", 28), caller, func));
       if (starred)
-	set_cdar(code, check_lambda_star_args(sc, cdar(code), cdr(code), sc->code));
+        set_cdar(code, check_lambda_star_args(sc, cdar(code), cdr(code), sc->code));
       else check_lambda_args(sc, cdar(code), NULL, sc->code);
       optimize_lambda(sc, !starred, func, cdar(code), cdr(code));
     }
@@ -78699,8 +78699,8 @@ static void check_define(s7_scheme *sc)
   if (sc->cur_op == OP_DEFINE)
     {
       if ((is_pair(car(code))) &&
-	  (!is_possibly_constant(func)))
-	pair_set_syntax_op(sc->code, OP_DEFINE_FUNCHECKED);
+          (!is_possibly_constant(func)))
+        pair_set_syntax_op(sc->code, OP_DEFINE_FUNCHECKED);
       else pair_set_syntax_op(sc->code, OP_DEFINE_UNCHECKED);
     }
   else pair_set_syntax_op(sc->code, (starred) ? OP_DEFINE_STAR_UNCHECKED : OP_DEFINE_CONSTANT_UNCHECKED);
@@ -78720,10 +78720,10 @@ static bool op_define_unchecked(s7_scheme *sc)
       sc->value = make_closure(sc, cdar(code), cdr(code), T_CLOSURE_STAR, CLOSURE_ARITY_NOT_SET);
       /* closure_body might not be cdr(code) after make_closure (add_trace) */
       if ((is_pair(locp)) && (has_location(locp)))
-	{
-	  pair_set_location(closure_body(sc->value), pair_location(locp));
-	  set_has_location(closure_body(sc->value));
-	}
+        {
+          pair_set_location(closure_body(sc->value), pair_location(locp));
+          set_has_location(closure_body(sc->value));
+        }
       sc->code = caar(code);
       return(false);
     }
@@ -78733,11 +78733,11 @@ static bool op_define_unchecked(s7_scheme *sc)
       s7_pointer x = car(code);
       sc->code = cadr(code);
       if (is_pair(sc->code))
-	{
-	  push_stack_no_args(sc, OP_DEFINE1, x);
-	  sc->cur_op = optimize_op(sc->code);
-	  return(true);
-	}
+        {
+          push_stack_no_args(sc, OP_DEFINE1, x);
+          sc->cur_op = optimize_op(sc->code);
+          return(true);
+        }
       sc->value = (is_symbol(sc->code)) ? lookup_global(sc, sc->code) : sc->code;
       sc->code = x;
     }
@@ -78752,10 +78752,10 @@ static bool op_define_unchecked(s7_scheme *sc)
        */
       s7_pointer x = make_closure(sc, args, cdr(code), T_CLOSURE | ((!s7_is_proper_list(sc, args)) ? T_COPY_ARGS : 0), (is_null(args)) ? 0 : CLOSURE_ARITY_NOT_SET);
       if ((is_pair(locp)) && (has_location(locp)))
-	{
-	  pair_set_location(closure_body(x), pair_location(locp));
-	  set_has_location(closure_body(x));
-	}
+        {
+          pair_set_location(closure_body(x), pair_location(locp));
+          set_has_location(closure_body(x));
+        }
       sc->value = T_Ext(x);
       sc->code = caar(code);
     }
@@ -78783,72 +78783,72 @@ static s7_pointer make_funclet(s7_scheme *sc, s7_pointer new_func, s7_pointer fu
     {
       s7_pointer last_slot = NULL;
       if (is_closure(new_func))
-	{
-	  if (is_pair(arg))
-	    {
-	      last_slot = make_slot(sc, car(arg), sc->nil);
-	      slot_set_next(last_slot, slot_end);
-	      let_set_slots(new_let, last_slot);
-	      symbol_set_local_slot(car(arg), let_id(new_let), last_slot);
-	      for (arg = cdr(arg); is_pair(arg); arg = cdr(arg))
-		last_slot = inline_add_slot_at_end(sc, let_id(new_let), last_slot, car(arg), sc->nil);
-	    }
-	  if (is_symbol(arg))
-	    {
-	      if (last_slot)
-		last_slot = add_slot_at_end(sc, let_id(new_let), last_slot, arg, sc->nil);
-	      else
-		{
-		  last_slot = make_slot(sc, arg, sc->nil);
-		  slot_set_next(last_slot, slot_end);
-		  let_set_slots(new_let, last_slot);
-		  symbol_set_local_slot(arg, let_id(new_let), last_slot);
-		}
-	      set_is_rest_slot(last_slot);
-	    }}
+        {
+          if (is_pair(arg))
+            {
+              last_slot = make_slot(sc, car(arg), sc->nil);
+              slot_set_next(last_slot, slot_end);
+              let_set_slots(new_let, last_slot);
+              symbol_set_local_slot(car(arg), let_id(new_let), last_slot);
+              for (arg = cdr(arg); is_pair(arg); arg = cdr(arg))
+                last_slot = inline_add_slot_at_end(sc, let_id(new_let), last_slot, car(arg), sc->nil);
+            }
+          if (is_symbol(arg))
+            {
+              if (last_slot)
+                last_slot = add_slot_at_end(sc, let_id(new_let), last_slot, arg, sc->nil);
+              else
+                {
+                  last_slot = make_slot(sc, arg, sc->nil);
+                  slot_set_next(last_slot, slot_end);
+                  let_set_slots(new_let, last_slot);
+                  symbol_set_local_slot(arg, let_id(new_let), last_slot);
+                }
+              set_is_rest_slot(last_slot);
+            }}
       else /* closure_star */
-	{
-	  s7_pointer slot, first_default = sc->nil;
-	  let_set_slots(new_let, slot_end);
-	  for (; is_pair(arg); arg = cdr(arg))
-	    {
-	      s7_pointer par = car(arg);
-	      if (is_pair(par))
-		{
-		  s7_pointer val = cadr(par);
-		  slot = add_slot_checked(sc, new_let, car(par), sc->nil);
-		  slot_set_expression(slot, val);
-		  if ((is_symbol(val)) || (is_pair(val)))
-		    {
-		      if (is_null(first_default))
-			first_default = slot;
-		      set_slot_defaults(slot);
-		    }}
-	      else
-		if (is_keyword(par))
-		  {
-		    if (par == sc->rest_keyword)
-		      {
-			arg = cdr(arg);
-			slot = add_slot_checked(sc, new_let, car(arg), sc->nil);
-			slot_set_expression(slot, sc->nil);
-		      }}
-		else
-		  {
-		    slot = add_slot_checked(sc, new_let, par, sc->nil);
-		    slot_set_expression(slot, sc->F);
-		  }}
-	  if (is_symbol(arg))
-	    {
-	      slot = add_slot_checked(sc, new_let, arg, sc->nil);     /* set up rest arg */
-	      set_is_rest_slot(slot);
-	      slot_set_expression(slot, sc->nil);
-	    }
-	  if (tis_slot(let_slots(new_let)))
-	    {
-	      let_set_slots(new_let, reverse_slots(let_slots(new_let)));
-	      slot_set_pending_value(let_slots(new_let), first_default);
-	    }}
+        {
+          s7_pointer slot, first_default = sc->nil;
+          let_set_slots(new_let, slot_end);
+          for (; is_pair(arg); arg = cdr(arg))
+            {
+              s7_pointer par = car(arg);
+              if (is_pair(par))
+                {
+                  s7_pointer val = cadr(par);
+                  slot = add_slot_checked(sc, new_let, car(par), sc->nil);
+                  slot_set_expression(slot, val);
+                  if ((is_symbol(val)) || (is_pair(val)))
+                    {
+                      if (is_null(first_default))
+                        first_default = slot;
+                      set_slot_defaults(slot);
+                    }}
+              else
+                if (is_keyword(par))
+                  {
+                    if (par == sc->rest_keyword)
+                      {
+                        arg = cdr(arg);
+                        slot = add_slot_checked(sc, new_let, car(arg), sc->nil);
+                        slot_set_expression(slot, sc->nil);
+                      }}
+                else
+                  {
+                    slot = add_slot_checked(sc, new_let, par, sc->nil);
+                    slot_set_expression(slot, sc->F);
+                  }}
+          if (is_symbol(arg))
+            {
+              slot = add_slot_checked(sc, new_let, arg, sc->nil);     /* set up rest arg */
+              set_is_rest_slot(slot);
+              slot_set_expression(slot, sc->nil);
+            }
+          if (tis_slot(let_slots(new_let)))
+            {
+              let_set_slots(new_let, reverse_slots(let_slots(new_let)));
+              slot_set_pending_value(let_slots(new_let), first_default);
+            }}
       set_immutable_let(new_let);
     }
   else let_set_slots(new_let, slot_end); /* if unsafe closure, arg-holding-let will be created on each call */
@@ -78864,10 +78864,10 @@ static bool op_define_constant(s7_scheme *sc)
   if (is_symbol_and_keyword(car(code)))        /* (define-constant :rest :allow-other-keys) */
     {
       if (car(code) == cadr(code))             /* (define-constant pi pi) returns pi */
-	{
-	  sc->value = car(code);
-	  return(true);
-	}
+        {
+          sc->value = car(code);
+          return(true);
+        }
       syntax_error_with_caller_nr(sc, "~A ~A: keywords are constants", 29, sc->define_constant_symbol, car(code));
     }
   if ((is_symbol(car(code))) &&                /* (define-constant abs abs): "abs will not be touched" */
@@ -78895,7 +78895,7 @@ static void op_define_constant1(s7_scheme *sc)
       set_possibly_constant(sc->code);
       set_immutable_slot(slot);
       if (is_any_closure(slot_value(slot)))
-	set_immutable(slot_value(slot)); /* for the optimizer mainly */
+        set_immutable(slot_value(slot)); /* for the optimizer mainly */
     }
 }
 
@@ -78916,7 +78916,7 @@ static inline void define_funchecked(s7_scheme *sc)
     {
       set_safe_closure(new_func);
       if (is_very_safe_closure_body(cdr(code)))
-	set_very_safe_closure(new_func);
+        set_very_safe_closure(new_func);
       make_funclet(sc, new_func, sc->value, sc->curlet);
     }
   else closure_set_let(new_func, sc->curlet);  /* unsafe closures created by other functions do not support *function* */
@@ -78942,7 +78942,7 @@ static s7_pointer check_define_macro(s7_scheme *sc, opcode_t op, s7_pointer form
   if (is_syntactic_symbol(mac_name))
     {
       if (sc->safety > NO_SAFETY)
-	s7_warn(sc, 256, "%s: syntactic keywords tend to behave badly if redefined: %s\n", display(mac_name), display_truncated(sc->code));
+        s7_warn(sc, 256, "%s: syntactic keywords tend to behave badly if redefined: %s\n", display(mac_name), display_truncated(sc->code));
       set_local(mac_name);
     }
   if (is_constant_symbol(sc, mac_name))
@@ -78953,20 +78953,20 @@ static s7_pointer check_define_macro(s7_scheme *sc, opcode_t op, s7_pointer form
 
   if (s7_list_length(sc, cdr(sc->code)) < 0)                      /* (define-macro (hi) 1 . 2) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~A: macro body messed up, ~A", 28), caller, sc->code));
+             set_elist_3(sc, wrap_string(sc, "~A: macro body messed up, ~A", 28), caller, sc->code));
 
   args = cdar(sc->code);
   if ((!is_list(args)) &&
       (!is_symbol(args)))
     error_nr(sc, sc->syntax_error_symbol,                      /* (define-macro (mac . 1) ...) */
-	     set_elist_3(sc, wrap_string(sc, "macro ~A argument list is ~S?", 29), mac_name, args));
+             set_elist_3(sc, wrap_string(sc, "macro ~A argument list is ~S?", 29), mac_name, args));
 
   if ((op == OP_DEFINE_MACRO) || (op == OP_DEFINE_BACRO) || (op == OP_DEFINE_EXPANSION))
     {
       for (; is_pair(args); args = cdr(args))
-	if (!is_symbol(car(args)))
-	  error_nr(sc, sc->syntax_error_symbol,                /* (define-macro (mac 1) ...) */
-		   set_elist_3(sc, wrap_string(sc, "~A parameter name, ~A, is not a symbol", 38), caller, car(args)));
+        if (!is_symbol(car(args)))
+          error_nr(sc, sc->syntax_error_symbol,                /* (define-macro (mac 1) ...) */
+                   set_elist_3(sc, wrap_string(sc, "~A parameter name, ~A, is not a symbol", 38), caller, car(args)));
       check_lambda_args(sc, cdar(sc->code), NULL, form);
     }
   else set_cdar(sc->code, check_lambda_star_args(sc, args, NULL, form));
@@ -78986,20 +78986,20 @@ static s7_pointer check_macro(s7_scheme *sc, opcode_t op, s7_pointer form)
   if ((!is_list(args)) &&
       (!is_symbol(args)))
     error_nr(sc, sc->syntax_error_symbol,                      /* (macro #(0) ...) */
-	     set_elist_2(sc, wrap_string(sc, "macro parameter list is ~S?", 27), args));
+             set_elist_2(sc, wrap_string(sc, "macro parameter list is ~S?", 27), args));
 
   if ((op == OP_MACRO) || (op == OP_BACRO))
     {
       for (; is_pair(args); args = cdr(args))
-	if (!is_symbol(car(args)))
-	  error_nr(sc, sc->syntax_error_symbol,                /* (macro (1) ...) */
-		   set_elist_3(sc, wrap_string(sc, "~A parameter name, ~A, is not a symbol", 38), caller, car(args)));
+        if (!is_symbol(car(args)))
+          error_nr(sc, sc->syntax_error_symbol,                /* (macro (1) ...) */
+                   set_elist_3(sc, wrap_string(sc, "~A parameter name, ~A, is not a symbol", 38), caller, car(args)));
       check_lambda_args(sc, car(sc->code), NULL, form);
     }
   else set_car(sc->code, check_lambda_star_args(sc, args, NULL, form));
   if (s7_list_length(sc, cdr(sc->code)) < 0)                   /* (macro () 1 . 2) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~A: macro body messed up, ~A", 28), caller, form));
+             set_elist_3(sc, wrap_string(sc, "~A: macro body messed up, ~A", 28), caller, form));
 
   return(sc->code);
 }
@@ -79095,28 +79095,28 @@ static goto_t op_expansion(s7_scheme *sc)
       if (!is_let(sc->curlet)) set_curlet(sc, sc->rootlet);
 
       if ((symbol_id(symbol) == 0) ||
-	  (sc->curlet == sc->nil))
-	slot = global_slot(symbol);
+          (sc->curlet == sc->nil))
+        slot = global_slot(symbol);
       else slot = s7_slot(sc, symbol);
 
       sc->code = (is_slot(slot)) ? slot_value(slot) : sc->undefined;
       if ((!is_either_macro(sc->code)) || (!is_expansion(sc->code)))
-	clear_expansion(symbol);
+        clear_expansion(symbol);
       else
-	{
-	  /* call the reader macro */
-	  sc->args = cdr(sc->value);
-	  push_stack_no_code(sc, OP_EXPANSION, sc->nil);
-	  set_curlet(sc, make_let(sc, closure_let(sc->code)));
-	  transfer_macro_info(sc, sc->code);
-	  if (!is_macro_star(sc->code))
-	    return(goto_apply_lambda);
-	  apply_macro_star_1(sc);
-	  return(goto_begin);
-	  /* bacros don't seem to make sense here -- they are tied to the run-time environment,
-	   *   procedures would need to evaluate their arguments in rootlet
-	   */
-	}}
+        {
+          /* call the reader macro */
+          sc->args = cdr(sc->value);
+          push_stack_no_code(sc, OP_EXPANSION, sc->nil);
+          set_curlet(sc, make_let(sc, closure_let(sc->code)));
+          transfer_macro_info(sc, sc->code);
+          if (!is_macro_star(sc->code))
+            return(goto_apply_lambda);
+          apply_macro_star_1(sc);
+          return(goto_begin);
+          /* bacros don't seem to make sense here -- they are tied to the run-time environment,
+           *   procedures would need to evaluate their arguments in rootlet
+           */
+        }}
   return(fall_through);
 }
 
@@ -79185,7 +79185,7 @@ static goto_t op_macroexpand(s7_scheme *sc)
   if (!is_symbol(caar(sc->code)))
     {
       if (!is_any_macro(caar(sc->code)))
-	syntax_error_nr(sc, "macroexpand argument is not a macro call: ~A", 44, sc->code);
+        syntax_error_nr(sc, "macroexpand argument is not a macro call: ~A", 44, sc->code);
       sc->code = caar(sc->code);
       return(macroexpand(sc));
     }
@@ -79242,12 +79242,12 @@ static void op_finish_expansion(s7_scheme *sc)
   if (sc->value == sc->no_value)
     {
       if (stack_top_op(sc) != OP_LOAD_RETURN_IF_EOF) /* latter op if empty expansion at top-level */
-	{
-	  if (stack_top_op(sc) != OP_READ_LIST)      /* OP_EVAL_STRING: (eval-string "(reader-cond...)") where reader-cond returns (values) */
-	    sc->value = sc->F;                       /* (eval-string "") -> #f, was nil_string for awhile */
-	  else set_stack_top_op(sc, OP_READ_NEXT);
-	  /* OP_READ_DONE: (eval-string (object->string (with-input-from-string "(reader-cond ((provided? 'surreals) 123))" read))) */
-	}}
+        {
+          if (stack_top_op(sc) != OP_READ_LIST)      /* OP_EVAL_STRING: (eval-string "(reader-cond...)") where reader-cond returns (values) */
+            sc->value = sc->F;                       /* (eval-string "") -> #f, was nil_string for awhile */
+          else set_stack_top_op(sc, OP_READ_NEXT);
+          /* OP_READ_DONE: (eval-string (object->string (with-input-from-string "(reader-cond ((provided? 'surreals) 123))" read))) */
+        }}
   else
     if (is_pair(sc->value))
       sc->value = copy_body(sc, sc->value);
@@ -79267,8 +79267,8 @@ static void check_with_let(s7_scheme *sc)
     syntax_error_nr(sc, "stray dot in with-let body: ~S", 30, sc->code);
 
   pair_set_syntax_op(sc->code, ((is_normal_symbol(car(form))) &&
-				(is_normal_symbol(cadr(form))) && /* (with-let lt a) is not the same as (with-let lt :a) */
-				(is_null(cddr(form)))) ? OP_WITH_LET_S : OP_WITH_LET_UNCHECKED);
+                                (is_normal_symbol(cadr(form))) && /* (with-let lt a) is not the same as (with-let lt :a) */
+                                (is_null(cddr(form)))) ? OP_WITH_LET_S : OP_WITH_LET_UNCHECKED);
   set_current_code(sc, sc->code);
 }
 
@@ -79279,7 +79279,7 @@ static bool op_with_let_unchecked(s7_scheme *sc)
   if (!is_pair(sc->value))
     {
       if (is_symbol(sc->value))
-	sc->value = lookup_checked(sc, sc->value);
+        sc->value = lookup_checked(sc, sc->value);
       sc->code = cdr(sc->code);
       return(false);
     }
@@ -79298,15 +79298,15 @@ static s7_pointer fx_with_let_s(s7_scheme *sc, s7_pointer arg)
     {
       e = find_let(sc, e);
       if (!is_let(e))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "with-let takes an environment argument: ~A", 42), car(code)));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "with-let takes an environment argument: ~A", 42), car(code)));
     }
   val = let_ref(sc, e, sym); /* (with-let e s) -> (let-ref e s), "s" unevalled? */
   if (val == sc->undefined)  /* but sym can have the value #<undefined>: (with-let (inlet 'x #<undefined>) x) */
     {
       if ((e == sc->s7_starlet) && (is_slot(global_slot(sym)))) /* (let () (define (func) (with-let *s7* letrec*)) (func) (func)), .5 tlet */
-	return(global_value(sym));                              /* perhaps the e=*s7* check is not needed */
+        return(global_value(sym));                              /* perhaps the e=*s7* check is not needed */
       if (is_slot(lookup_slot_with_let(sc, sym, e)))
-	return(sc->undefined);
+        return(sc->undefined);
       unbound_variable_error_nr(sc, sym);
     }
   return(val);
@@ -79318,7 +79318,7 @@ static void activate_with_let(s7_scheme *sc, s7_pointer e)
     {
       s7_pointer new_e = find_let(sc, e); /* sc->nil here means no let found */
       if ((!is_let(new_e)) && (!has_closure_let(e)))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "with-let takes an environment argument: ~A", 42), e));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "with-let takes an environment argument: ~A", 42), e));
       e = new_e;
     }
   if (e == sc->rootlet)
@@ -79345,31 +79345,31 @@ static void check_cond(s7_scheme *sc)
   for (x = code; is_pair(x); x = cdr(x))
     if (!is_pair(car(x)))                                       /* (cond 1) or (cond (#t 1) 3) */
       error_nr(sc, sc->syntax_error_symbol,
-	       set_elist_3(sc, wrap_string(sc, "every clause in cond must be a pair: ~S in ~A", 45),
-			   car(x), object_to_string_truncated(sc, form)));
+               set_elist_3(sc, wrap_string(sc, "every clause in cond must be a pair: ~S in ~A", 45),
+                           car(x), object_to_string_truncated(sc, form)));
     else
       {
-	s7_pointer y = car(x);
-	if (!s7_is_proper_list(sc, cdr(y)))                     /* (cond (xxx . 1)) */
-	  error_nr(sc, sc->syntax_error_symbol,
-		   set_elist_3(sc, wrap_string(sc, "stray dot? ~S in ~A", 19),
-			       y, object_to_string_truncated(sc, form)));
-	if (is_pair(cdr(y)))
-	  {
-	    if (is_pair(cddr(y))) result_single = false;
-	    if (is_undefined_feed_to(sc, cadr(y)))
-	      {
-		has_feed_to = true;
-		if (!is_pair(cddr(y)))                         /* (cond (#t =>)) or (cond (#t => . 1)) */
-		  error_nr(sc, sc->syntax_error_symbol,
-			   set_elist_3(sc, wrap_string(sc, "cond: '=>' target missing?  ~S in ~A", 36),
-				       x, object_to_string_truncated(sc, form)));
-		if (is_pair(cdddr(y)))                         /* (cond (1 => + abs)) */
-		  error_nr(sc, sc->syntax_error_symbol,
-			   set_elist_3(sc, wrap_string(sc, "cond: '=>' has too many targets: ~S in ~A", 41),
-				       x, object_to_string_truncated(sc, form)));
-	      }}
-	else result_single = false;
+        s7_pointer y = car(x);
+        if (!s7_is_proper_list(sc, cdr(y)))                     /* (cond (xxx . 1)) */
+          error_nr(sc, sc->syntax_error_symbol,
+                   set_elist_3(sc, wrap_string(sc, "stray dot? ~S in ~A", 19),
+                               y, object_to_string_truncated(sc, form)));
+        if (is_pair(cdr(y)))
+          {
+            if (is_pair(cddr(y))) result_single = false;
+            if (is_undefined_feed_to(sc, cadr(y)))
+              {
+                has_feed_to = true;
+                if (!is_pair(cddr(y)))                         /* (cond (#t =>)) or (cond (#t => . 1)) */
+                  error_nr(sc, sc->syntax_error_symbol,
+                           set_elist_3(sc, wrap_string(sc, "cond: '=>' target missing?  ~S in ~A", 36),
+                                       x, object_to_string_truncated(sc, form)));
+                if (is_pair(cdddr(y)))                         /* (cond (1 => + abs)) */
+                  error_nr(sc, sc->syntax_error_symbol,
+                           set_elist_3(sc, wrap_string(sc, "cond: '=>' has too many targets: ~S in ~A", 41),
+                                       x, object_to_string_truncated(sc, form)));
+              }}
+        else result_single = false;
       }
   if (is_not_null(x))                                          /* (cond ((1 2)) . 1) */
     error_nr(sc, sc->syntax_error_symbol, set_elist_2(sc, wrap_string(sc, "cond: stray dot? ~S", 19), form));
@@ -79379,33 +79379,33 @@ static void check_cond(s7_scheme *sc)
       s7_pointer p = car(x);
       /* clear_has_fx(p); */ /* a kludge -- if has_fx here (and not re-fx'd below), someone messed up earlier -- but was fx_treeable set? */
       if (is_fxable(sc, car(p)))
-	fx_annotate_arg(sc, p, sc->curlet);
+        fx_annotate_arg(sc, p, sc->curlet);
       for (p = cdr(p); is_pair(p); p = cdr(p))
-	if (!has_fx(p))
-	  {
-	    s7_function f = fx_choose(sc, p, sc->curlet, let_symbol_is_safe);
-	    if (f) set_fx_direct(p, f); else result_fx = false;
-	  }}
+        if (!has_fx(p))
+          {
+            s7_function f = fx_choose(sc, p, sc->curlet, let_symbol_is_safe);
+            if (f) set_fx_direct(p, f); else result_fx = false;
+          }}
   if ((is_fx_treeable(code)) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, code);
 
   if (has_feed_to)
     {
       pair_set_syntax_op(form, OP_COND_UNCHECKED);
       if (is_null(cdr(code)))
-	{
-	  s7_pointer expr = car(code), f;
-	  f = caddr(expr);
-	  if ((is_proper_list_3(sc, f)) &&
-	      (car(f) == sc->lambda_symbol))
-	    {
-	      s7_pointer arg = cadr(f);
-	      if ((is_pair(arg)) &&
-		  (is_null(cdr(arg))) &&
-		  (is_symbol(car(arg)))) /* (define (hi) (cond (#t => (lambda (s) s)))) */
-		{
-		  set_opt2_lambda(code, caddar(code));  /* (lambda ...) above */
-		  pair_set_syntax_op(form, OP_COND_FEED);
-		}}}}
+        {
+          s7_pointer expr = car(code), f;
+          f = caddr(expr);
+          if ((is_proper_list_3(sc, f)) &&
+              (car(f) == sc->lambda_symbol))
+            {
+              s7_pointer arg = cadr(f);
+              if ((is_pair(arg)) &&
+                  (is_null(cdr(arg))) &&
+                  (is_symbol(car(arg)))) /* (define (hi) (cond (#t => (lambda (s) s)))) */
+                {
+                  set_opt2_lambda(code, caddar(code));  /* (lambda ...) above */
+                  pair_set_syntax_op(form, OP_COND_FEED);
+                }}}}
   else
     {
       s7_pointer p;
@@ -79414,28 +79414,28 @@ static void check_cond(s7_scheme *sc)
 
       pair_set_syntax_op(form, OP_COND_SIMPLE);
       for (i = 0, p = code; xopt && (is_pair(p)); i++, p = cdr(p))
-	xopt = ((has_fx(car(p))) && (is_pair(cdar(p))));
+        xopt = ((has_fx(car(p))) && (is_pair(cdar(p))));
       if (xopt)
-	{
-	  pair_set_syntax_op(form, (result_fx) ? OP_COND_NA_NA : ((result_single) ? OP_COND_NA_NP_O : OP_COND_NA_NP));
+        {
+          pair_set_syntax_op(form, (result_fx) ? OP_COND_NA_NA : ((result_single) ? OP_COND_NA_NP_O : OP_COND_NA_NP));
           if (result_single)
-	    {
-	      if (i == 2)
-		{
-		  p = caadr(code);
-		  if ((p == sc->else_symbol) || (p == sc->T))
-		    pair_set_syntax_op(form, OP_COND_NA_2E);
-		}
-	      else
-		if (i == 3)
-		  {
-		    p = caaddr(code);
-		    if ((p == sc->else_symbol) || (p == sc->T))
-		      pair_set_syntax_op(form, OP_COND_NA_3E);
-		  }}}
+            {
+              if (i == 2)
+                {
+                  p = caadr(code);
+                  if ((p == sc->else_symbol) || (p == sc->T))
+                    pair_set_syntax_op(form, OP_COND_NA_2E);
+                }
+              else
+                if (i == 3)
+                  {
+                    p = caaddr(code);
+                    if ((p == sc->else_symbol) || (p == sc->T))
+                      pair_set_syntax_op(form, OP_COND_NA_3E);
+                  }}}
       else
-	if (result_single)
-	  pair_set_syntax_op(form, OP_COND_SIMPLE_O);
+        if (result_single)
+          pair_set_syntax_op(form, OP_COND_SIMPLE_O);
     }
   set_opt3_any(code, caar(code));
 }
@@ -79484,57 +79484,57 @@ static bool op_cond1(s7_scheme *sc)
   while (true)
     {
       if (is_true(sc, sc->value)) /* test is true, so evaluate result */
-	{
-	  sc->code = cdar(sc->code);
-	  if (is_pair(sc->code))
-	    {
-	      if (is_null(cdr(sc->code)))
-		{
-		  if (has_fx(sc->code))
-		    {
-		      sc->value = fx_call(sc, sc->code);
-		      pop_stack(sc);
-		      return(true); /* goto top_no_pop */
-		    }
-		  sc->code = car(sc->code);
-		  sc->cur_op = optimize_op(sc->code);
-		  return(true);
-		}
-	      /* check_cond catches stray dots */
-	      if (is_undefined_feed_to(sc, car(sc->code)))
-		return(false);
-	      if (has_fx(sc->code))
-		{
-		  sc->value = fx_call(sc, sc->code);
-		  sc->code = cdr(sc->code);
-		  if (is_pair(cdr(sc->code)))
-		    push_stack_no_args(sc, sc->begin_op, cdr(sc->code));
-		}
-	      else push_stack_no_args(sc, sc->begin_op, T_Pair(cdr(sc->code)));
-	      sc->code = car(sc->code);
-	      sc->cur_op = optimize_op(sc->code);
-	      return(true);
-	    }
-	  if ((S7_DEBUGGING) && (is_multiple_value(sc->value))) fprintf(stderr, "cond1 mv case %s\n", display(sc->value));
-	  pop_stack(sc);
-	  return(true);
-	}
+        {
+          sc->code = cdar(sc->code);
+          if (is_pair(sc->code))
+            {
+              if (is_null(cdr(sc->code)))
+                {
+                  if (has_fx(sc->code))
+                    {
+                      sc->value = fx_call(sc, sc->code);
+                      pop_stack(sc);
+                      return(true); /* goto top_no_pop */
+                    }
+                  sc->code = car(sc->code);
+                  sc->cur_op = optimize_op(sc->code);
+                  return(true);
+                }
+              /* check_cond catches stray dots */
+              if (is_undefined_feed_to(sc, car(sc->code)))
+                return(false);
+              if (has_fx(sc->code))
+                {
+                  sc->value = fx_call(sc, sc->code);
+                  sc->code = cdr(sc->code);
+                  if (is_pair(cdr(sc->code)))
+                    push_stack_no_args(sc, sc->begin_op, cdr(sc->code));
+                }
+              else push_stack_no_args(sc, sc->begin_op, T_Pair(cdr(sc->code)));
+              sc->code = car(sc->code);
+              sc->cur_op = optimize_op(sc->code);
+              return(true);
+            }
+          if ((S7_DEBUGGING) && (is_multiple_value(sc->value))) fprintf(stderr, "cond1 mv case %s\n", display(sc->value));
+          pop_stack(sc);
+          return(true);
+        }
       sc->code = cdr(sc->code); /* go to next clause */
       if (is_null(sc->code))
-	{
-	  sc->value = sc->unspecified;
-	  pop_stack(sc);
-	  return(true);
-	}
+        {
+          sc->value = sc->unspecified;
+          pop_stack(sc);
+          return(true);
+        }
       if (has_fx(car(sc->code)))
-	sc->value = fx_call(sc, car(sc->code));
+        sc->value = fx_call(sc, car(sc->code));
       else
-	{
-	  push_stack_no_args_direct(sc, OP_COND1);
-	  sc->code = caar(sc->code);
-	  sc->cur_op = optimize_op(sc->code);
-	  return(true);
-	}}
+        {
+          push_stack_no_args_direct(sc, OP_COND1);
+          sc->code = caar(sc->code);
+          sc->cur_op = optimize_op(sc->code);
+          return(true);
+        }}
   return(true); /* make the compiler happy */
 }
 
@@ -79543,38 +79543,38 @@ static bool op_cond1_simple(s7_scheme *sc)
   while (true)
     {
       if (is_true(sc, sc->value))
-	{
-	  sc->code = T_Lst(cdar(sc->code));
-	  if (is_null(sc->code))
-	    {
-	      if ((S7_DEBUGGING) && (is_multiple_value(sc->value))) fprintf(stderr, "cond1_simple mv case %s\n", display(sc->value));
-	      pop_stack(sc);
-	      return(true);
-	    }
- 	  if (!has_fx(sc->code))
-	    return(false);
-	  sc->value = fx_call(sc, sc->code);
-	  sc->code = cdr(sc->code);
-	  if (is_pair(sc->code)) return(false); /* goto begin */
-	  pop_stack(sc);
-	  return(true); /* goto top_no_pop */
-	}
+        {
+          sc->code = T_Lst(cdar(sc->code));
+          if (is_null(sc->code))
+            {
+              if ((S7_DEBUGGING) && (is_multiple_value(sc->value))) fprintf(stderr, "cond1_simple mv case %s\n", display(sc->value));
+              pop_stack(sc);
+              return(true);
+            }
+           if (!has_fx(sc->code))
+            return(false);
+          sc->value = fx_call(sc, sc->code);
+          sc->code = cdr(sc->code);
+          if (is_pair(sc->code)) return(false); /* goto begin */
+          pop_stack(sc);
+          return(true); /* goto top_no_pop */
+        }
       sc->code = cdr(sc->code);
       if (is_null(sc->code))
-	{
-	  sc->value = sc->unspecified;
-	  pop_stack(sc);
-	  return(true);
-	}
+        {
+          sc->value = sc->unspecified;
+          pop_stack(sc);
+          return(true);
+        }
       if (has_fx(car(sc->code)))
-	sc->value = fx_call(sc, car(sc->code));
+        sc->value = fx_call(sc, car(sc->code));
       else
-	{
-	  push_stack_no_args_direct(sc, OP_COND1_SIMPLE);
-	  sc->code = caar(sc->code);
-	  sc->cur_op = optimize_op(sc->code);
-	  return(true);
-	}}
+        {
+          push_stack_no_args_direct(sc, OP_COND1_SIMPLE);
+          sc->code = caar(sc->code);
+          sc->cur_op = optimize_op(sc->code);
+          return(true);
+        }}
 }
 
 static bool op_cond1_simple_o(s7_scheme *sc)
@@ -79582,31 +79582,31 @@ static bool op_cond1_simple_o(s7_scheme *sc)
   while (true)
     {
       if (is_true(sc, sc->value))
-	{
- 	  sc->code = cdar(sc->code);
- 	  if (has_fx(sc->code))
- 	    {
- 	      sc->value = fx_call(sc, sc->code);
- 	      return(true); /* goto start */
- 	    }
- 	  sc->code = car(sc->code);
-	  return(false);
-	}
+        {
+           sc->code = cdar(sc->code);
+           if (has_fx(sc->code))
+             {
+               sc->value = fx_call(sc, sc->code);
+               return(true); /* goto start */
+             }
+           sc->code = car(sc->code);
+          return(false);
+        }
       sc->code = cdr(sc->code);
       if (is_null(sc->code))
-	{
-	  sc->value = sc->unspecified;
-	  return(true);
-	}
+        {
+          sc->value = sc->unspecified;
+          return(true);
+        }
       if (has_fx(car(sc->code)))
-	sc->value = fx_call(sc, car(sc->code));
+        sc->value = fx_call(sc, car(sc->code));
       else
-	{
-	  check_stack_size(sc); /* 4-May-21 snd-test */
-	  push_stack_no_args_direct(sc, OP_COND1_SIMPLE_O);
-	  sc->code = caar(sc->code);
-	  return(false);
-	}}
+        {
+          check_stack_size(sc); /* 4-May-21 snd-test */
+          push_stack_no_args_direct(sc, OP_COND1_SIMPLE_O);
+          sc->code = caar(sc->code);
+          return(false);
+        }}
 }
 
 static bool op_cond_na_np(s7_scheme *sc)  /* all tests are fxable, results may be a mixture, no =>, no missing results */
@@ -79614,17 +79614,17 @@ static bool op_cond_na_np(s7_scheme *sc)  /* all tests are fxable, results may b
   for (s7_pointer p = cdr(sc->code); is_pair(p); p = cdr(p))
     if (is_true(sc, fx_call(sc, car(p))))
       {
-	for (p = T_Lst(cdar(p)); is_pair(p); p = cdr(p))
-	  if (has_fx(T_Pair(p)))
-	    sc->value = fx_call(sc, p);
-	  else
-	    {
-	      if (is_pair(cdr(p)))
-		push_stack_no_args(sc, OP_COND_NA_NP_1, cdr(p));
-	      sc->code = car(p);
-	      return(false);
-	    }
-	return(true);
+        for (p = T_Lst(cdar(p)); is_pair(p); p = cdr(p))
+          if (has_fx(T_Pair(p)))
+            sc->value = fx_call(sc, p);
+          else
+            {
+              if (is_pair(cdr(p)))
+                push_stack_no_args(sc, OP_COND_NA_NP_1, cdr(p));
+              sc->code = car(p);
+              return(false);
+            }
+        return(true);
       }
   sc->value = sc->unspecified;
   return(true);
@@ -79637,10 +79637,10 @@ static bool op_cond_na_np_1(s7_scheme *sc)  /* continuing to handle a multi-stat
       sc->value = fx_call(sc, p);
     else
       {
-	if (is_pair(cdr(p)))
-	  push_stack_no_args(sc, OP_COND_NA_NP_1, cdr(p));
-	sc->code = car(p);
-	return(false);
+        if (is_pair(cdr(p)))
+          push_stack_no_args(sc, OP_COND_NA_NP_1, cdr(p));
+        sc->code = car(p);
+        return(false);
       }
   return(true);
 }
@@ -79650,14 +79650,14 @@ static Inline bool inline_op_cond_na_np_o(s7_scheme *sc)  /* all tests are fxabl
   for (s7_pointer p = cdr(sc->code); is_pair(p); p = cdr(p))
     if (is_true(sc, fx_call(sc, car(p))))
       {
-	p = cdar(p);
-	if (has_fx(T_Pair(p)))
-	  {
-	    sc->value = fx_call(sc, p);
-	    return(true);
-	  }
-	sc->code = car(p);
-	return(false);
+        p = cdar(p);
+        if (has_fx(T_Pair(p)))
+          {
+            sc->value = fx_call(sc, p);
+            return(true);
+          }
+        sc->code = car(p);
+        return(false);
       }
   sc->value = sc->unspecified;
   return(true);
@@ -79718,18 +79718,18 @@ static bool feed_to(s7_scheme *sc)
       sc->args = multiple_value(sc->value);
       clear_multiple_value(sc->args);
       if (is_symbol(cadr(sc->code)))
-	{
-	  sc->code = lookup_global(sc, cadr(sc->code));  /* car is => */
-	  return(true);
-	}}
+        {
+          sc->code = lookup_global(sc, cadr(sc->code));  /* car is => */
+          return(true);
+        }}
   else
     {
       if (is_symbol(cadr(sc->code)))
-	{
-	  sc->code = lookup_global(sc, cadr(sc->code));  /* car is => */
-	  sc->args = (needs_copied_args(sc->code)) ? list_1(sc, sc->value) : set_plist_1(sc, sc->value);
-	  return(true);
-	}
+        {
+          sc->code = lookup_global(sc, cadr(sc->code));  /* car is => */
+          sc->args = (needs_copied_args(sc->code)) ? list_1(sc, sc->value) : set_plist_1(sc, sc->value);
+          return(true);
+        }
       sc->args = list_1(sc, sc->value);                 /* not plist here */
     }
   push_stack_direct(sc, OP_FEED_TO_1);
@@ -79745,7 +79745,7 @@ static void check_set(s7_scheme *sc)
   if (!is_pair(code))
     {
       if (is_null(code))                                             /* (set!) */
-	syntax_error_nr(sc, "set!: not enough arguments: ~A", 30, form);
+        syntax_error_nr(sc, "set!: not enough arguments: ~A", 30, form);
       syntax_error_nr(sc, "set!: stray dot? ~A", 19, form);          /* (set! . 1) */
     }
   settee = car(code);
@@ -79753,7 +79753,7 @@ static void check_set(s7_scheme *sc)
   if (!is_pair(cdr(code)))
     {
       if (is_null(cdr(code)))                                        /* (set! var) */
-	syntax_error_nr(sc, "set!: not enough arguments: ~A", 30, form);
+        syntax_error_nr(sc, "set!: not enough arguments: ~A", 30, form);
       syntax_error_nr(sc, "set!: stray dot? ~A", 19, form);          /* (set! var . 1) */
     }
   value = cadr(code);                                                /* the value has not yet been evaluated */
@@ -79768,84 +79768,84 @@ static void check_set(s7_scheme *sc)
   if (is_pair(settee))
     {
       if ((is_pair(car(settee))) &&
-	  (!is_list(cdr(settee))))                                   /* (set! ('(1 2) . 0) 1) */
-	syntax_error_nr(sc, "improper list of arguments to set!: ~A", 38, form);
+          (!is_list(cdr(settee))))                                   /* (set! ('(1 2) . 0) 1) */
+        syntax_error_nr(sc, "improper list of arguments to set!: ~A", 38, form);
       if (!s7_is_proper_list(sc, settee))                            /* (set! ("hi" . 1) #\a) or (set! (#(1 2) . 1) 0) */
-	syntax_error_nr(sc, "set! target is an improper list: (set! ~A ...)", 46, settee);
+        syntax_error_nr(sc, "set! target is an improper list: (set! ~A ...)", 46, settee);
     }
   else
     if (!is_symbol(settee))                                          /* (set! 12345 1) */
       error_nr(sc, sc->syntax_error_symbol,                          /* (set! #_abs 32) -> "error: set! can't change abs (a c-function), (set! abs 32)" */
-	       set_elist_4(sc, wrap_string(sc, "set! can't change ~S (~A), ~S", 29), settee, sc->type_names[type(settee)], form));
+               set_elist_4(sc, wrap_string(sc, "set! can't change ~S (~A), ~S", 29), settee, sc->type_names[type(settee)], form));
 
     else
       if (is_keyword(settee))                                        /* (set! :hi 3) */
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "set!: can't change keyword's value: ~S in ~S", 44), settee, form));
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "set!: can't change keyword's value: ~S in ~S", 44), settee, form));
 
   if (is_pair(settee))                                               /* here we have (set! (...) ...) */
     {
       pair_set_syntax_op(form, OP_SET_UNCHECKED); /* if not pair car, op_set_normal below */
       if (is_symbol(car(settee)))
-	{
-	  if (is_null(cdr(settee)))                                  /* (set! (symbol) ...) */
-	    {
-	      if (is_fxable(sc, value))
-		{
-		  pair_set_syntax_op(form, OP_SET_opSq_A);           /* (set! (symbol) fxable) */
-		  fx_annotate_arg(sc, cdr(code), sc->curlet);        /* cdr(code) = value */
-		}}
-	  else
-	    if (is_null(cddr(settee))) /* we check cddr(code) above */  /* this leaves (set! (vect i j) 1) unhandled so we go to OP_SET_UNCHECKED */
-	      {
-		s7_pointer index = cadr(settee);
-		if (is_fxable(sc, index))
-		  {
-		    if ((car(settee) == sc->let_ref_symbol) && (!is_pair(cddr(settee)))) /* perhaps also check for hash-table-ref */
-		      /* (let () (define (func) (catch #t (lambda () (set! (let-ref (list 1)) 1)) (lambda args 'error))) (func) (func)) */
-		      error_nr(sc, sc->wrong_number_of_args_symbol,
-			       set_elist_2(sc, wrap_string(sc, "set!: not enough arguments for let-ref: ~S", 42), sc->code));
-		    fx_annotate_arg(sc, cdr(settee), sc->curlet);    /* cdr(settee) -> index */
-		    if (is_fxable(sc, value))
-		      {
-			pair_set_syntax_op(form, OP_SET_opSAq_A);   /* (set! (symbol fxable) fxable) */
-			/* perhaps: if "S" is a known function (etc), split this -- the runtime check for a macro here is very expensive
-			 *   fprintf(stderr, "(set! %s %s)\n", display(settee), display(value));
-			 *   S=vector[tnum]/hash-table/c_func/s7/setter[tset]/var-*[lt]/c-obj[tobj]/dilambda[tstar]
-			 * so, if not any_macro OP_SET_opFAq_A else OP_SET_opMAq_A? or just the latter
-			 * also (set! (car a) b) -> (set-car! a b), (set! (cfunc a) b) -> ((setter cfunc) a b)
-			 * set_opsaq_a as "unknown" equivalent -> all the special cases which check just their case, maybe a no-parcel option
+        {
+          if (is_null(cdr(settee)))                                  /* (set! (symbol) ...) */
+            {
+              if (is_fxable(sc, value))
+                {
+                  pair_set_syntax_op(form, OP_SET_opSq_A);           /* (set! (symbol) fxable) */
+                  fx_annotate_arg(sc, cdr(code), sc->curlet);        /* cdr(code) = value */
+                }}
+          else
+            if (is_null(cddr(settee))) /* we check cddr(code) above */  /* this leaves (set! (vect i j) 1) unhandled so we go to OP_SET_UNCHECKED */
+              {
+                s7_pointer index = cadr(settee);
+                if (is_fxable(sc, index))
+                  {
+                    if ((car(settee) == sc->let_ref_symbol) && (!is_pair(cddr(settee)))) /* perhaps also check for hash-table-ref */
+                      /* (let () (define (func) (catch #t (lambda () (set! (let-ref (list 1)) 1)) (lambda args 'error))) (func) (func)) */
+                      error_nr(sc, sc->wrong_number_of_args_symbol,
+                               set_elist_2(sc, wrap_string(sc, "set!: not enough arguments for let-ref: ~S", 42), sc->code));
+                    fx_annotate_arg(sc, cdr(settee), sc->curlet);    /* cdr(settee) -> index */
+                    if (is_fxable(sc, value))
+                      {
+                        pair_set_syntax_op(form, OP_SET_opSAq_A);   /* (set! (symbol fxable) fxable) */
+                        /* perhaps: if "S" is a known function (etc), split this -- the runtime check for a macro here is very expensive
+                         *   fprintf(stderr, "(set! %s %s)\n", display(settee), display(value));
+                         *   S=vector[tnum]/hash-table/c_func/s7/setter[tset]/var-*[lt]/c-obj[tobj]/dilambda[tstar]
+                         * so, if not any_macro OP_SET_opFAq_A else OP_SET_opMAq_A? or just the latter
+                         * also (set! (car a) b) -> (set-car! a b), (set! (cfunc a) b) -> ((setter cfunc) a b)
+                         * set_opsaq_a as "unknown" equivalent -> all the special cases which check just their case, maybe a no-parcel option
                          */
-			fx_annotate_arg(sc, cdr(code), sc->curlet); /* cdr(code) -> value */
+                        fx_annotate_arg(sc, cdr(code), sc->curlet); /* cdr(code) -> value */
 
-			if (car(settee) == sc->s7_starlet_symbol)    /* (set! (*s7* 'field) value) */
-			  {
-			    s7_pointer sym = (is_symbol(index)) ?
-			                       ((is_keyword(index)) ? keyword_symbol(index) : index) :
+                        if (car(settee) == sc->s7_starlet_symbol)    /* (set! (*s7* 'field) value) */
+                          {
+                            s7_pointer sym = (is_symbol(index)) ?
+                                               ((is_keyword(index)) ? keyword_symbol(index) : index) :
                                                ((is_quoted_symbol(index)) ? cadr(index) : index);
-			    if ((is_symbol(sym)) && (s7_starlet_symbol(sym) != SL_NO_FIELD))
-			      {
-				/* perhaps preset field -> op_print_length_set[misc?]|safety[tstar] etc, most (timing test) cases are just heap-size called once */
-				set_safe_optimize_op(form, OP_IMPLICIT_S7_STARLET_SET);
-				set_opt3_sym(form, sym);
-			      }}}
-		    else pair_set_syntax_op(form, OP_SET_opSAq_P);  /* (set! (symbol fxable) any) */
-		  }}
-	    else
-	      if ((is_null(cdddr(settee))) &&
-		  (car(settee) != sc->with_let_symbol))              /* (set! (with-let lt a) 32) needs to be handled by op_set_with_let_1 */
-		{
-		  s7_pointer index1 = cadr(settee), index2 = caddr(settee);
-		  if ((is_fxable(sc, index1)) && (is_fxable(sc, index2)))
-		    {
-		      fx_annotate_args(sc, cdr(settee), sc->curlet);    /* cdr(settee) -> index1 and 2 */
-		      if (is_fxable(sc, value))
-			{
-			  pair_set_syntax_op(form, OP_SET_opSAAq_A);   /* (set! (symbol fxable fxable) fxable) */
-			  fx_annotate_arg(sc, cdr(code), sc->curlet);  /* cdr(code) -> value */
-			}
-		      else pair_set_syntax_op(form, OP_SET_opSAAq_P);  /* (set! (symbol fxable fxable) any) */
-		    }}}
+                            if ((is_symbol(sym)) && (s7_starlet_symbol(sym) != SL_NO_FIELD))
+                              {
+                                /* perhaps preset field -> op_print_length_set[misc?]|safety[tstar] etc, most (timing test) cases are just heap-size called once */
+                                set_safe_optimize_op(form, OP_IMPLICIT_S7_STARLET_SET);
+                                set_opt3_sym(form, sym);
+                              }}}
+                    else pair_set_syntax_op(form, OP_SET_opSAq_P);  /* (set! (symbol fxable) any) */
+                  }}
+            else
+              if ((is_null(cdddr(settee))) &&
+                  (car(settee) != sc->with_let_symbol))              /* (set! (with-let lt a) 32) needs to be handled by op_set_with_let_1 */
+                {
+                  s7_pointer index1 = cadr(settee), index2 = caddr(settee);
+                  if ((is_fxable(sc, index1)) && (is_fxable(sc, index2)))
+                    {
+                      fx_annotate_args(sc, cdr(settee), sc->curlet);    /* cdr(settee) -> index1 and 2 */
+                      if (is_fxable(sc, value))
+                        {
+                          pair_set_syntax_op(form, OP_SET_opSAAq_A);   /* (set! (symbol fxable fxable) fxable) */
+                          fx_annotate_arg(sc, cdr(code), sc->curlet);  /* cdr(code) -> value */
+                        }
+                      else pair_set_syntax_op(form, OP_SET_opSAAq_P);  /* (set! (symbol fxable fxable) any) */
+                    }}}
       return;
     }
   pair_set_syntax_op(form, OP_SET_NORMAL);
@@ -79853,102 +79853,102 @@ static void check_set(s7_scheme *sc)
     {
       s7_pointer slot = s7_slot(sc, settee);
       if ((is_slot(slot)) &&
-	  (!slot_has_setter(slot)) &&
-	  (!is_immutable(slot)) &&
-	  (!is_syntactic_symbol(settee)))
-	{
-	  if (is_normal_symbol(value))
-	    {
-	      s7_pointer slot1 = s7_slot(sc, value);
-	      if ((is_slot(slot1)) && (!slot_has_setter(slot1)))
-		{
-		  pair_set_syntax_op(form, OP_SET_S_S);
-		  set_opt2_sym(code, value);
-		}}
-	  else
-	    if ((!is_pair(value)) ||
-		((is_quote(car(value))) && (is_pair(cdr(value))))) /* (quote . 1) ? */
-	      {
-		pair_set_syntax_op(form, OP_SET_S_C);
-		set_opt2_con(code, (is_pair(value)) ? cadr(value) : value);
-	      }
-	    else
-	      {
-		pair_set_syntax_op(form, OP_SET_S_P);
-		if (is_optimized(value))
-		  {
-		    if (optimize_op(value) == HOP_SAFE_C_SS)
-		      {
-			if (settee == cadr(value))
-			  {
-			    pair_set_syntax_op(form, OP_INCREMENT_SA);
-			    fx_annotate_arg(sc, cddr(value), sc->curlet); /* this sets fx_proc(arg) */
-			    set_opt2_pair(code, cddr(value));
-			  }
-			else
-			  {
-			    pair_set_syntax_op(form, OP_SET_S_A);
-			    fx_annotate_arg(sc, cdr(code), sc->curlet);
-			  }}
-		    else
-		      {
-			if (is_fxable(sc, value))
-			  {
-			    pair_set_syntax_op(form, OP_SET_S_A);
-			    fx_annotate_arg(sc, cdr(code), sc->curlet);
-			  }
-			if ((is_safe_c_op(optimize_op(value))) &&
-			    (is_pair(cdr(value))) &&
-			    (settee == cadr(value)) &&
-			    (!is_null(cddr(value))))
-			  {
-			    if (is_null(cdddr(value)))
-			      {
-				if (is_fxable(sc, caddr(value)))
-				  {
-				    pair_set_syntax_op(form, OP_INCREMENT_SA);
-				    fx_annotate_arg(sc, cddr(value), sc->curlet); /* this sets fx_proc(arg) */
-				    set_opt2_pair(code, cddr(value));
-				  }}
-			    else
-			      if ((is_null(cddddr(value))) &&
-				  (is_fxable(sc, caddr(value))) &&
-				  (is_fxable(sc, cadddr(value))))
-				{
-				  pair_set_syntax_op(form, OP_INCREMENT_SAA);
-				  fx_annotate_args(sc, cddr(value), sc->curlet);
-				  /* fx_annotate_arg(sc, cdddr(value), sc->curlet); */
-				  set_opt2_pair(code, cddr(value));
-				}}}}
-		if ((is_h_optimized(value)) &&
-		    (is_safe_c_op(optimize_op(value))) &&    /* else might not be opt1_cfunc? (opt1_lambda probably) */
-		    (!is_unsafe(value)) &&                   /* is_unsafe(value) can happen! */
-		    (is_not_null(cdr(value))))               /* (set! x (y)) */
-		  {
-		    if (is_not_null(cddr(value)))
-		      {
-			if ((caddr(value) == int_one) &&
-			    (cadr(value) == settee))
-			  {
-			    if (opt1_cfunc(value) == sc->add_x1)
-			      pair_set_syntax_op(form, OP_INCREMENT_BY_1);
-			    else
-			      if (opt1_cfunc(value) == sc->subtract_x1)
-				pair_set_syntax_op(form, OP_DECREMENT_BY_1);
-			  }
-			else
-			  if ((cadr(value) == int_one) &&
-			      (caddr(value) == settee) &&
-			      (opt1_cfunc(value) == sc->add_1x))
-			    pair_set_syntax_op(form, OP_INCREMENT_BY_1);
-			  else
-			    if ((settee == caddr(value)) &&
-				(is_safe_symbol(cadr(value))) &&
-				(car(value) == sc->cons_symbol))
-			      {
-				pair_set_syntax_op(form, OP_SET_CONS);
-				set_opt2_sym(code, cadr(value));
-			      }}}}}}
+          (!slot_has_setter(slot)) &&
+          (!is_immutable(slot)) &&
+          (!is_syntactic_symbol(settee)))
+        {
+          if (is_normal_symbol(value))
+            {
+              s7_pointer slot1 = s7_slot(sc, value);
+              if ((is_slot(slot1)) && (!slot_has_setter(slot1)))
+                {
+                  pair_set_syntax_op(form, OP_SET_S_S);
+                  set_opt2_sym(code, value);
+                }}
+          else
+            if ((!is_pair(value)) ||
+                ((is_quote(car(value))) && (is_pair(cdr(value))))) /* (quote . 1) ? */
+              {
+                pair_set_syntax_op(form, OP_SET_S_C);
+                set_opt2_con(code, (is_pair(value)) ? cadr(value) : value);
+              }
+            else
+              {
+                pair_set_syntax_op(form, OP_SET_S_P);
+                if (is_optimized(value))
+                  {
+                    if (optimize_op(value) == HOP_SAFE_C_SS)
+                      {
+                        if (settee == cadr(value))
+                          {
+                            pair_set_syntax_op(form, OP_INCREMENT_SA);
+                            fx_annotate_arg(sc, cddr(value), sc->curlet); /* this sets fx_proc(arg) */
+                            set_opt2_pair(code, cddr(value));
+                          }
+                        else
+                          {
+                            pair_set_syntax_op(form, OP_SET_S_A);
+                            fx_annotate_arg(sc, cdr(code), sc->curlet);
+                          }}
+                    else
+                      {
+                        if (is_fxable(sc, value))
+                          {
+                            pair_set_syntax_op(form, OP_SET_S_A);
+                            fx_annotate_arg(sc, cdr(code), sc->curlet);
+                          }
+                        if ((is_safe_c_op(optimize_op(value))) &&
+                            (is_pair(cdr(value))) &&
+                            (settee == cadr(value)) &&
+                            (!is_null(cddr(value))))
+                          {
+                            if (is_null(cdddr(value)))
+                              {
+                                if (is_fxable(sc, caddr(value)))
+                                  {
+                                    pair_set_syntax_op(form, OP_INCREMENT_SA);
+                                    fx_annotate_arg(sc, cddr(value), sc->curlet); /* this sets fx_proc(arg) */
+                                    set_opt2_pair(code, cddr(value));
+                                  }}
+                            else
+                              if ((is_null(cddddr(value))) &&
+                                  (is_fxable(sc, caddr(value))) &&
+                                  (is_fxable(sc, cadddr(value))))
+                                {
+                                  pair_set_syntax_op(form, OP_INCREMENT_SAA);
+                                  fx_annotate_args(sc, cddr(value), sc->curlet);
+                                  /* fx_annotate_arg(sc, cdddr(value), sc->curlet); */
+                                  set_opt2_pair(code, cddr(value));
+                                }}}}
+                if ((is_h_optimized(value)) &&
+                    (is_safe_c_op(optimize_op(value))) &&    /* else might not be opt1_cfunc? (opt1_lambda probably) */
+                    (!is_unsafe(value)) &&                   /* is_unsafe(value) can happen! */
+                    (is_not_null(cdr(value))))               /* (set! x (y)) */
+                  {
+                    if (is_not_null(cddr(value)))
+                      {
+                        if ((caddr(value) == int_one) &&
+                            (cadr(value) == settee))
+                          {
+                            if (opt1_cfunc(value) == sc->add_x1)
+                              pair_set_syntax_op(form, OP_INCREMENT_BY_1);
+                            else
+                              if (opt1_cfunc(value) == sc->subtract_x1)
+                                pair_set_syntax_op(form, OP_DECREMENT_BY_1);
+                          }
+                        else
+                          if ((cadr(value) == int_one) &&
+                              (caddr(value) == settee) &&
+                              (opt1_cfunc(value) == sc->add_1x))
+                            pair_set_syntax_op(form, OP_INCREMENT_BY_1);
+                          else
+                            if ((settee == caddr(value)) &&
+                                (is_safe_symbol(cadr(value))) &&
+                                (car(value) == sc->cons_symbol))
+                              {
+                                pair_set_syntax_op(form, OP_SET_CONS);
+                                set_opt2_sym(code, cadr(value));
+                              }}}}}}
 }
 
 static void op_set_s_c(s7_scheme *sc)
@@ -79988,7 +79988,7 @@ static void op_set_safe(s7_scheme *sc) /* name is misleading -- we need to check
   if (is_slot(slot))
     {
       if (is_immutable_slot(slot))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->set_symbol, sc->code));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->set_symbol, sc->code));
       slot_set_value(slot, sc->value);
     }
   else
@@ -80050,13 +80050,13 @@ static noreturn void no_setter_error_nr(s7_scheme *sc, s7_pointer obj)
 
   if (type(caar(sc->code)) >= T_C_FUNCTION_STAR)
     error_nr(sc, sc->no_setter_symbol,
-	     set_elist_6(sc, wrap_string(sc, "~W (~A) does not have a setter: (set! (~W~{~^ ~S~}) ~S)", 55),
-			 caar(sc->code), sc->type_names[typ], caar(sc->code), cdar(sc->code), cadr(sc->code)));
+             set_elist_6(sc, wrap_string(sc, "~W (~A) does not have a setter: (set! (~W~{~^ ~S~}) ~S)", 55),
+                         caar(sc->code), sc->type_names[typ], caar(sc->code), cdar(sc->code), cadr(sc->code)));
   error_nr(sc, sc->no_setter_symbol,
-	   set_elist_5(sc, wrap_string(sc, "~A (~A) does not have a setter: (set! ~S ~S)", 44),
-		       caar(sc->code), sc->type_names[typ],
-		       (is_pair(car(sc->code))) ? copy_any_list(sc, car(sc->code)) : car(sc->code),
-		       (is_pair(cadr(sc->code))) ? copy_any_list(sc, cadr(sc->code)) : cadr(sc->code)));
+           set_elist_5(sc, wrap_string(sc, "~A (~A) does not have a setter: (set! ~S ~S)", 44),
+                       caar(sc->code), sc->type_names[typ],
+                       (is_pair(car(sc->code))) ? copy_any_list(sc, car(sc->code)) : car(sc->code),
+                       (is_pair(cadr(sc->code))) ? copy_any_list(sc, cadr(sc->code)) : cadr(sc->code)));
   /* copy is necessary due to the way quoted lists|symbols are handled in op_set_with_let_1|2 and copy_tree
    *   copy_proper_list can fail: (let ((x #f)) (map set! `((set! x (+ x 1)) (* x 2)) (hash-table 'a 1)))
    */
@@ -80066,7 +80066,7 @@ static bool pair3_cfunc(s7_scheme *sc, s7_pointer obj, s7_pointer setf, s7_point
 {
   if (!c_function_is_aritable(setf, 2))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_6(sc, wrap_string(sc, "set!: two arguments? (~A ~S ~S), ~A is (setter ~A)", 50), setf, arg, value, setf, obj));
+             set_elist_6(sc, wrap_string(sc, "set!: two arguments? (~A ~S ~S), ~A is (setter ~A)", 50), setf, arg, value, setf, obj));
   if (!is_safe_procedure(setf)) /* if unsafe, we can't call c_function_call(setf) directly (need drop into eval+apply) */
     {
       sc->code = setf;
@@ -80099,24 +80099,24 @@ static bool set_pair3(s7_scheme *sc, s7_pointer obj, s7_pointer arg, s7_pointer
       sc->value = g_vector_set_3(sc, with_list_t3(obj, arg, value));
 #else
       if (vector_rank(obj) > 1)
-	sc->value = g_vector_set(sc, with_list_t3(obj, arg, value));
+        sc->value = g_vector_set(sc, with_list_t3(obj, arg, value));
       else
-	{
-	  s7_int index;
-	  if (!is_t_integer(arg))
-	    error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be an integer: ~S", 41), sc->code));
-	  index = integer(arg);
-	  if (index < 0)
-	    error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must not be negative: ~S", 43), sc->code));
-	  if (index >= vector_length(obj))
-	    error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be less than vector length: ~S", 54), sc->code));
-	  if (is_immutable_vector(obj))
-	    immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->vector_set_symbol, obj));
-	  if (is_typed_vector(obj))
-	    value = typed_vector_setter(sc, obj, index, value);
-	  else vector_element(obj, index) = value;
-	  sc->value = T_Ext(value);
-	}
+        {
+          s7_int index;
+          if (!is_t_integer(arg))
+            error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be an integer: ~S", 41), sc->code));
+          index = integer(arg);
+          if (index < 0)
+            error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must not be negative: ~S", 43), sc->code));
+          if (index >= vector_length(obj))
+            error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be less than vector length: ~S", 54), sc->code));
+          if (is_immutable_vector(obj))
+            immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->vector_set_symbol, obj));
+          if (is_typed_vector(obj))
+            value = typed_vector_setter(sc, obj, index, value);
+          else vector_element(obj, index) = value;
+          sc->value = T_Ext(value);
+        }
 #endif
       break;
 
@@ -80125,20 +80125,20 @@ static bool set_pair3(s7_scheme *sc, s7_pointer obj, s7_pointer arg, s7_pointer
       sc->value = g_string_set(sc, with_list_t3(obj, arg, value));
 #else
       {
-	s7_int index;
-	if (!is_t_integer(arg))
-	  error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "index must be an integer: ~S", 28), sc->code));
-	index = integer(arg);
-	if (index < 0)
-	  error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "index must not be negative: ~S", 30), sc->code));
-	if (index >= string_length(obj))
-	  error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "index must be less than sequence length: ~S", 43), sc->code));
-	if (is_immutable_string(obj))
-	  immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->string_set_symbol, obj));
-	if (!is_character(value))
-	  error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "string-set!: value must be a character: ~S", 42), sc->code));
-	string_value(obj)[index] = (char)s7_character(value);
-	sc->value = value;
+        s7_int index;
+        if (!is_t_integer(arg))
+          error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "index must be an integer: ~S", 28), sc->code));
+        index = integer(arg);
+        if (index < 0)
+          error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "index must not be negative: ~S", 30), sc->code));
+        if (index >= string_length(obj))
+          error_nr(sc, sc->out_of_range_symbol, set_elist_2(sc, wrap_string(sc, "index must be less than sequence length: ~S", 43), sc->code));
+        if (is_immutable_string(obj))
+          immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->string_set_symbol, obj));
+        if (!is_character(value))
+          error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "string-set!: value must be a character: ~S", 42), sc->code));
+        string_value(obj)[index] = (char)s7_character(value);
+        sc->value = value;
       }
 #endif
       break;
@@ -80149,7 +80149,7 @@ static bool set_pair3(s7_scheme *sc, s7_pointer obj, s7_pointer arg, s7_pointer
 
     case T_HASH_TABLE:
       if (is_immutable_hash_table(obj))  /* not checked in s7_hash_table_set */
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->hash_table_set_symbol, obj));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->hash_table_set_symbol, obj));
       sc->value = s7_hash_table_set(sc, obj, arg, value);
       break;
 
@@ -80160,14 +80160,14 @@ static bool set_pair3(s7_scheme *sc, s7_pointer obj, s7_pointer arg, s7_pointer
     case T_C_RST_NO_REQ_FUNCTION: case T_C_FUNCTION:
     case T_C_FUNCTION_STAR:      /* obj here is a c_function, but its setter could be a closure and vice versa below */
       if (is_c_function(c_function_setter(obj)))
-	return(pair3_cfunc(sc, obj, c_function_setter(obj), arg, value));
+        return(pair3_cfunc(sc, obj, c_function_setter(obj), arg, value));
       sc->code = c_function_setter(obj); /* closure/macro */
       sc->args = (needs_copied_args(sc->code)) ? list_2(sc, arg, value) : set_plist_2(sc, arg, value);
       return(true); /* goto APPLY; not redundant -- setter type might not match getter type */
 
     case T_C_MACRO: /* (set! (setter quasiquote) (lambda args args)) (define (f) (set! (quasiquote 1) (setter 'i))) (f) (f) */
       if (is_c_function(c_macro_setter(obj)))
-	return(pair3_cfunc(sc, obj, c_macro_setter(obj), arg, value));
+        return(pair3_cfunc(sc, obj, c_macro_setter(obj), arg, value));
       sc->code = c_macro_setter(obj);
       sc->args = (needs_copied_args(sc->code)) ? list_2(sc, arg, value) : set_plist_2(sc, arg, value);
       return(true); /* goto APPLY; */
@@ -80176,7 +80176,7 @@ static bool set_pair3(s7_scheme *sc, s7_pointer obj, s7_pointer arg, s7_pointer
     case T_BACRO:   case T_BACRO_STAR:
     case T_CLOSURE: case T_CLOSURE_STAR:
       if (is_c_function(closure_setter(obj)))
-	return(pair3_cfunc(sc, obj, closure_setter(obj), arg, value));
+        return(pair3_cfunc(sc, obj, closure_setter(obj), arg, value));
       sc->code = closure_setter(obj);
       sc->args = (needs_copied_args(sc->code)) ? list_2(sc, arg, value) : set_plist_2(sc, arg, value);
       return(true); /* goto APPLY; */
@@ -80194,7 +80194,7 @@ static bool op_set_opsq_a(s7_scheme *sc)        /* (set! (symbol) fxable) */
 
   if ((is_sequence(obj)) && (!is_c_object(obj)))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_3(sc, wrap_string(sc, "set!: not enough arguments for ~S: ~S", 37), caar(code), sc->code));
+             set_elist_3(sc, wrap_string(sc, "set!: not enough arguments for ~S: ~S", 37), caar(code), sc->code));
 
   setf = setter_p_pp(sc, obj, sc->curlet);
   if (is_any_macro(setf))
@@ -80207,8 +80207,8 @@ static bool op_set_opsq_a(s7_scheme *sc)        /* (set! (symbol) fxable) */
   if (is_c_function(setf))
     {
       if (c_function_min_args(setf) > 1)
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_3(sc, wrap_string(sc, "set!: not enough arguments: (~A ~S)", 35), setf, value));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_3(sc, wrap_string(sc, "set!: not enough arguments: (~A ~S)", 35), setf, value));
       sc->value = c_function_call(setf)(sc, with_list_t1(value));
       return(false);
     }
@@ -80226,11 +80226,11 @@ static bool op_set_opsaq_a(s7_scheme *sc)        /* (set! (symbol fxable) fxable
     {
       s7_pointer setf = setter_p_pp(sc, obj, sc->curlet);
       if (is_any_macro(setf))
-	{
-	  sc->code = setf;
-	  sc->args = pair_append(sc, cdar(code), cdr(code));
-	  return(true);
-	}}
+        {
+          sc->code = setf;
+          sc->args = pair_append(sc, cdar(code), cdr(code));
+          return(true);
+        }}
   value = fx_call(sc, cdr(code));
   gc_protect_via_stack(sc, value);
   if (dont_eval_args(obj)) /* this check is expensive, 8 in tstar, similar lg, but it's faster than is_any_macro */
@@ -80256,11 +80256,11 @@ static inline bool op_set_opsaq_p(s7_scheme *sc)
     {
       s7_pointer setf = setter_p_pp(sc, obj, sc->curlet);
       if (is_any_macro(setf))
-	{
-	  sc->code = setf;
-	  sc->args = pair_append(sc, cdar(code), cdr(code));
-	  return(true);
-	}}
+        {
+          sc->code = setf;
+          sc->args = pair_append(sc, cdar(code), cdr(code));
+          return(true);
+        }}
   push_stack(sc, OP_SET_opSAq_P_1, obj, code);
   sc->code = cadr(code);
   return(false);
@@ -80280,7 +80280,7 @@ static bool pair4_cfunc(s7_scheme *sc, s7_pointer obj, s7_pointer setf, s7_point
 {
   if (!c_function_is_aritable(setf, 3))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_7(sc, wrap_string(sc, "set!: three arguments? (~A ~S ~S ~S), ~A is (setter ~A)", 55), setf, index1, index2, value, setf, obj));
+             set_elist_7(sc, wrap_string(sc, "set!: three arguments? (~A ~S ~S ~S), ~A is (setter ~A)", 55), setf, index1, index2, value, setf, obj));
   if (!is_safe_procedure(setf))
     {
       sc->code = setf;
@@ -80310,12 +80310,12 @@ static bool set_pair4(s7_scheme *sc, s7_pointer obj, s7_pointer index1, s7_point
       break;
     case T_VECTOR:
       if (vector_rank(obj) == 2)
-	sc->value = g_vector_set_4(sc, set_plist_4(sc, obj, index1, index2, value));
+        sc->value = g_vector_set_4(sc, set_plist_4(sc, obj, index1, index2, value));
       else
-	{
-	  sc->value = g_vector_ref(sc, with_list_t2(obj, index1));
-	  return(set_pair3(sc, sc->value, index2, value));
-	}
+        {
+          sc->value = g_vector_ref(sc, with_list_t2(obj, index1));
+          return(set_pair3(sc, sc->value, index2, value));
+        }
       break;
 
     case T_PAIR:
@@ -80333,14 +80333,14 @@ static bool set_pair4(s7_scheme *sc, s7_pointer obj, s7_pointer index1, s7_point
     case T_C_RST_NO_REQ_FUNCTION: case T_C_FUNCTION:
     case T_C_FUNCTION_STAR:      /* obj here is any_c_function, but its setter could be a closure and vice versa below */
       if (is_c_function(c_function_setter(obj)))
-	return(pair4_cfunc(sc, obj, c_function_setter(obj), index1, index2, value));
+        return(pair4_cfunc(sc, obj, c_function_setter(obj), index1, index2, value));
       sc->code = c_function_setter(obj); /* closure|macro */
       sc->args = (needs_copied_args(sc->code)) ? list_3(sc, index1, index2, value) : set_plist_3(sc, index1, index2, value);
       return(true); /* goto APPLY; not redundant -- setter type might not match getter type */
 
     case T_C_MACRO: /* (set! (setter quasiquote) (lambda (a . b) a)) (let () (define (func) (set! (quasiquote 'a 0) 3)) (func) (func)) */
       if (is_c_function(c_macro_setter(obj)))
-	return(pair4_cfunc(sc, obj, c_macro_setter(obj), index1, index2, value));
+        return(pair4_cfunc(sc, obj, c_macro_setter(obj), index1, index2, value));
       sc->code = c_macro_setter(obj);
       sc->args = (needs_copied_args(sc->code)) ? list_3(sc, index1, index2, value) : set_plist_3(sc, index1, index2, value);
       return(true); /* goto APPLY; */
@@ -80349,7 +80349,7 @@ static bool set_pair4(s7_scheme *sc, s7_pointer obj, s7_pointer index1, s7_point
     case T_BACRO:   case T_BACRO_STAR:
     case T_CLOSURE: case T_CLOSURE_STAR:
       if (is_c_function(closure_setter(obj)))
-	return(pair4_cfunc(sc, obj, closure_setter(obj), index1, index2, value));
+        return(pair4_cfunc(sc, obj, closure_setter(obj), index1, index2, value));
       sc->code = closure_setter(obj);
       sc->args = (needs_copied_args(sc->code)) ? list_3(sc, index1, index2, value) : set_plist_3(sc, index1, index2, value);
       return(true); /* goto APPLY; */
@@ -80369,11 +80369,11 @@ static bool op_set_opsaaq_a(s7_scheme *sc)        /* (set! (symbol fxable fxable
     {
       s7_pointer setf = setter_p_pp(sc, obj, sc->curlet);
       if (is_any_macro(setf))
-	{
-	  sc->code = setf;
-	  sc->args = pair_append(sc, cdar(code), cdr(code));
-	  return(true);
-	}}
+        {
+          sc->code = setf;
+          sc->args = pair_append(sc, cdar(code), cdr(code));
+          return(true);
+        }}
   value = fx_call(sc, cdr(code));
   gc_protect_via_stack(sc, value);
   index1 = fx_call(sc, cdar(code));
@@ -80391,11 +80391,11 @@ static bool op_set_opsaaq_p(s7_scheme *sc)
     {
       s7_pointer setf = setter_p_pp(sc, obj, sc->curlet);
       if (is_any_macro(setf))
-	{
-	  sc->code = setf;
-	  sc->args = pair_append(sc, cdar(code), cdr(code));
-	  return(true);
-	}}
+        {
+          sc->code = setf;
+          sc->args = pair_append(sc, cdar(code), cdr(code));
+          return(true);
+        }}
   push_stack(sc, OP_SET_opSAAq_P_1, obj, code);
   sc->code = cadr(code);
   return(false);
@@ -80419,28 +80419,28 @@ static bool op_set1(s7_scheme *sc)
   if (is_slot(lx))
     {
       if (is_immutable_slot(lx))
-	{
-	  if (s7_is_eqv(sc, slot_value(lx), sc->value)) return(true); /* (set! pi pi) -- this can be confusing! */
-	  /* eqv? needed here because 0 != 0 if one is int_zero and the other a mutable_integer from a loop, etc */
-	  immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->set_symbol, sym));
-	}
+        {
+          if (s7_is_eqv(sc, slot_value(lx), sc->value)) return(true); /* (set! pi pi) -- this can be confusing! */
+          /* eqv? needed here because 0 != 0 if one is int_zero and the other a mutable_integer from a loop, etc */
+          immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->set_symbol, sym));
+        }
       if (slot_has_setter(lx))
-	{
-	  s7_pointer func = slot_setter(lx);
-	  if (is_c_function(func))
-	    sc->value = call_c_function_setter(sc, func, sym, sc->value); /* perhaps better: apply_c_function -- has argnum error checks */
-	  else
-	    if (is_any_procedure(func))
-	      {
-		/* don't push OP_EVAL_DONE here and call eval(sc, OP_APPLY) below -- setter might hit an error */
-		/* 41297 (set! (v) val) where v=vector gets the setter, but calls vector-set! with no args */
-		push_stack_no_args(sc, OP_SET_FROM_SETTER, lx);
-		if (has_let_arg(func))
-		  sc->args = list_3(sc, sym, sc->value, sc->curlet);
-		else sc->args = list_2(sc, sym, sc->value);   /* these lists are reused as the closure_let slots in apply_lambda via apply_closure */
-		sc->code = func;
-		return(false); /* goto APPLY */
-	      }}
+        {
+          s7_pointer func = slot_setter(lx);
+          if (is_c_function(func))
+            sc->value = call_c_function_setter(sc, func, sym, sc->value); /* perhaps better: apply_c_function -- has argnum error checks */
+          else
+            if (is_any_procedure(func))
+              {
+                /* don't push OP_EVAL_DONE here and call eval(sc, OP_APPLY) below -- setter might hit an error */
+                /* 41297 (set! (v) val) where v=vector gets the setter, but calls vector-set! with no args */
+                push_stack_no_args(sc, OP_SET_FROM_SETTER, lx);
+                if (has_let_arg(func))
+                  sc->args = list_3(sc, sym, sc->value, sc->curlet);
+                else sc->args = list_2(sc, sym, sc->value);   /* these lists are reused as the closure_let slots in apply_lambda via apply_closure */
+                sc->code = func;
+                return(false); /* goto APPLY */
+              }}
       slot_set_value(lx, sc->value);
       symbol_increment_ctr(sym);        /* see define setfib example in s7test.scm -- I'm having second thoughts about this... */
       return(true); /* continue */
@@ -80463,25 +80463,25 @@ static bool op_set_with_let_1(s7_scheme *sc)
     syntax_error_nr(sc, "with-let needs a let and a symbol: (set! (with-let) ~$)", 55, sc->value);
   if (!is_pair(cdr(sc->args)))           /* (set! (with-let e) ...) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_3(sc, wrap_string(sc, "with-let in (set! (with-let ~S) ~$) has no symbol to set?", 57), car(sc->args), sc->value));
+             set_elist_3(sc, wrap_string(sc, "with-let in (set! (with-let ~S) ~$) has no symbol to set?", 57), car(sc->args), sc->value));
 
   e = car(sc->args);
   b = cadr(sc->args);
   if (is_multiple_value(x))              /* (set! (with-let lt) (values 1 2)) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_4(sc, wrap_string(sc, "can't (set! (with-let ~S ~S) (values ~{~S~^ ~})): too many values", 65), e, b, x));
+             set_elist_4(sc, wrap_string(sc, "can't (set! (with-let ~S ~S) (values ~{~S~^ ~})): too many values", 65), e, b, x));
 
   if (is_symbol(e))
     {
       if (is_symbol(b))
-	{
-	  e = lookup_checked(sc, e);     /* the let */
-	  if (!is_let(e))
-	    wrong_type_error_nr(sc, sc->let_set_symbol, 1, e, a_let_string);
-	  sc->value = let_set_1(sc, e, b, x);
-	  pop_stack(sc);
-	  return(true);
-	}
+        {
+          e = lookup_checked(sc, e);     /* the let */
+          if (!is_let(e))
+            wrong_type_error_nr(sc, sc->let_set_symbol, 1, e, a_let_string);
+          sc->value = let_set_1(sc, e, b, x);
+          pop_stack(sc);
+          return(true);
+        }
       sc->value = lookup_checked(sc, e);
       sc->code = set_plist_3(sc, sc->set_symbol, b, ((is_symbol(x)) || (is_pair(x))) ? set_plist_2(sc, sc->quote_function, x) : x);
       /* (let* ((x (vector 1 2)) (lt (curlet))) (set! (with-let lt (x 0)) 32) x) here: (set! (x 0) 32) */
@@ -80503,7 +80503,7 @@ static bool op_set_with_let_2(s7_scheme *sc)
   b = car(sc->args);
   if ((!is_symbol(b)) && (!is_pair(b)))
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_3(sc, wrap_string(sc, "can't set ~S in ~$", 18), b, set_ulist_1(sc, global_value(sc->set_symbol), sc->args)));
+             set_elist_3(sc, wrap_string(sc, "can't set ~S in ~$", 18), b, set_ulist_1(sc, global_value(sc->set_symbol), sc->args)));
   x = cadr(sc->args);
   if (is_symbol(b))   /* b is a symbol -- everything else is ready so call let-set! */
     {
@@ -80512,7 +80512,7 @@ static bool op_set_with_let_2(s7_scheme *sc)
     }
   if ((is_symbol(x)) || (is_pair(x)))                        /* (set! (with-let (inlet :v (vector 1 2)) (v 0)) 'a) */
     sc->code = list_3(sc, sc->set_symbol, b,
-		      ((is_symbol(x)) || (is_pair(x))) ? list_2(sc, sc->quote_function, x) : x);
+                      ((is_symbol(x)) || (is_pair(x))) ? list_2(sc, sc->quote_function, x) : x);
   else sc->code = cons(sc, sc->set_symbol, sc->args);        /* (set! (with-let (curlet) (*s7* 'print-length)) 16), x=16 b=(*s7* 'print-length) */
   return(false); /* fall into SET_WITH_LET */
 }
@@ -80543,21 +80543,21 @@ static Inline void inline_op_increment_by_1(s7_scheme *sc)  /* ([set!] ctr (+ ct
     switch (type(val))
       {
       case T_RATIO:
-	new_cell(sc, sc->value, T_RATIO);
-	set_numerator(sc->value, numerator(val) + denominator(val));
-	set_denominator(sc->value, denominator(val));
-	break;
+        new_cell(sc, sc->value, T_RATIO);
+        set_numerator(sc->value, numerator(val) + denominator(val));
+        set_denominator(sc->value, denominator(val));
+        break;
       case T_REAL:
-	sc->value = make_real(sc, real(val) + 1.0);
-	break;
+        sc->value = make_real(sc, real(val) + 1.0);
+        break;
       case T_COMPLEX:
-	new_cell(sc, sc->value, T_COMPLEX);
-	set_real_part(sc->value, real_part(val) + 1.0);
-	set_imag_part(sc->value, imag_part(val));
-	break;
+        new_cell(sc, sc->value, T_COMPLEX);
+        set_real_part(sc->value, real_part(val) + 1.0);
+        set_imag_part(sc->value, imag_part(val));
+        break;
       default:
-	sc->value = add_p_pp(sc, val, int_one);
-	break;
+        sc->value = add_p_pp(sc, val, int_one);
+        break;
       }
   slot_set_value(y, sc->value);
 }
@@ -80572,21 +80572,21 @@ static void op_decrement_by_1(s7_scheme *sc)  /* ([set!] ctr (- ctr 1)) */
     switch (type(val))
       {
       case T_RATIO:
-	new_cell(sc, sc->value, T_RATIO);
-	set_numerator(sc->value, numerator(val) - denominator(val));
-	set_denominator(sc->value, denominator(val));
-	break;
+        new_cell(sc, sc->value, T_RATIO);
+        set_numerator(sc->value, numerator(val) - denominator(val));
+        set_denominator(sc->value, denominator(val));
+        break;
       case T_REAL:
-	sc->value = make_real(sc, real(val) - 1.0);
-	break;
+        sc->value = make_real(sc, real(val) - 1.0);
+        break;
       case T_COMPLEX:
-	new_cell(sc, sc->value, T_COMPLEX);
-	set_real_part(sc->value, real_part(val) - 1.0);
-	set_imag_part(sc->value, imag_part(val));
-	break;
+        new_cell(sc, sc->value, T_COMPLEX);
+        set_real_part(sc->value, real_part(val) - 1.0);
+        set_imag_part(sc->value, imag_part(val));
+        break;
       default:
-	sc->value = g_subtract(sc, set_plist_2(sc, val, int_one));
-	break;
+        sc->value = g_subtract(sc, set_plist_2(sc, val, int_one));
+        break;
       }
   slot_set_value(y, sc->value);
 }
@@ -80603,10 +80603,10 @@ static Inline bool inline_op_implicit_vector_ref_a(s7_scheme *sc) /* called once
     {
       s7_int index = s7_integer_clamped_if_gmp(sc, x);
       if ((index < vector_length(v)) && (index >= 0))
-	{
-	  sc->value = (is_float_vector(v)) ? make_real(sc, float_vector(v, index)) : vector_getter(v)(sc, v, index);
-	  return(true);
-	}}
+        {
+          sc->value = (is_float_vector(v)) ? make_real(sc, float_vector(v, index)) : vector_getter(v)(sc, v, index);
+          return(true);
+        }}
   sc->value = vector_ref_1(sc, v, set_plist_1(sc, x));
   return(true);
 }
@@ -80622,7 +80622,7 @@ static s7_pointer fx_implicit_vector_ref_a(s7_scheme *sc, s7_pointer arg)
     {
       s7_int index = s7_integer_clamped_if_gmp(sc, x);
       if ((index < vector_length(v)) && (index >= 0))
-	return(vector_getter(v)(sc, v, index));
+        return(vector_getter(v)(sc, v, index));
     }
   return(vector_ref_1(sc, v, set_plist_1(sc, x)));
 }
@@ -80647,13 +80647,13 @@ static bool op_implicit_vector_ref_aa(s7_scheme *sc) /* if Inline 70 in concorda
       s7_int ix = s7_integer_clamped_if_gmp(sc, x);
       s7_int iy = s7_integer_clamped_if_gmp(sc, y);
       if ((ix >= 0) && (iy >= 0) &&
-	  (ix < vector_dimension(v, 0)) && (iy < vector_dimension(v, 1)))
-	{
-	  s7_int index = (ix * vector_offset(v, 0)) + iy;
-	  sc->value = vector_getter(v)(sc, v, index); /* check for normal vector saves in some cases, costs in others */
-	  unstack_gc_protect(sc);
-	  return(true);
-	}}
+          (ix < vector_dimension(v, 0)) && (iy < vector_dimension(v, 1)))
+        {
+          s7_int index = (ix * vector_offset(v, 0)) + iy;
+          sc->value = vector_getter(v)(sc, v, index); /* check for normal vector saves in some cases, costs in others */
+          unstack_gc_protect(sc);
+          return(true);
+        }}
   sc->value = vector_ref_1(sc, v, set_plist_2(sc, x, y));
   unstack_gc_protect(sc);
   return(true);
@@ -80721,21 +80721,21 @@ static goto_t set_implicit_vector(s7_scheme *sc, s7_pointer vect, s7_pointer ind
        *   sc->code here: ((v 0 'a) 32)
        */
       if (vector_rank(vect) == 1)
-	{
-	  s7_pointer ind = car(inds);
-	  if (is_symbol(ind)) ind = lookup_checked(sc, ind);
-	  if (is_t_integer(ind))
-	    {
-	      s7_pointer obj;
-	      s7_int index1 = integer(ind);
-	      if ((index1 < 0) || (index1 >= vector_length(vect)))
-		out_of_range_error_nr(sc, sc->vector_ref_symbol, int_two, car(inds), (index1 < 0) ? it_is_negative_string : it_is_too_large_string);
-	      obj = vector_element(vect, index1);
-	      if (!is_applicable(obj))
-		error_nr(sc, sc->no_setter_symbol,
-			 set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~S) is ~S which can't take arguments", 47), form, vect, car(inds), obj));
-	      return(call_set_implicit(sc, obj, cdr(inds), val, form));
-	    }}
+        {
+          s7_pointer ind = car(inds);
+          if (is_symbol(ind)) ind = lookup_checked(sc, ind);
+          if (is_t_integer(ind))
+            {
+              s7_pointer obj;
+              s7_int index1 = integer(ind);
+              if ((index1 < 0) || (index1 >= vector_length(vect)))
+                out_of_range_error_nr(sc, sc->vector_ref_symbol, int_two, car(inds), (index1 < 0) ? it_is_negative_string : it_is_too_large_string);
+              obj = vector_element(vect, index1);
+              if (!is_applicable(obj))
+                error_nr(sc, sc->no_setter_symbol,
+                         set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~S) is ~S which can't take arguments", 47), form, vect, car(inds), obj));
+              return(call_set_implicit(sc, obj, cdr(inds), val, form));
+            }}
       push_stack(sc, OP_SET2, cdr(inds), val);
       sc->code = list_2(sc, vect, car(inds));
       return(goto_unopt);
@@ -80744,48 +80744,48 @@ static goto_t set_implicit_vector(s7_scheme *sc, s7_pointer vect, s7_pointer ind
   if ((argnum > 1) || (vector_rank(vect) > 1))
     {
       if ((argnum == 2) &&
-	  (cdr(form) == sc->code) &&     /* form == cdr(sc->code) only on the outer call, thereafter form is the old form for better error messages */
-	  (is_fxable(sc, car(inds))) &&
-	  (is_fxable(sc, cadr(inds))) &&
-	  (is_fxable(sc, car(val))))     /* (set! (v fx fx) fx) */
-	{
-	  fx_annotate_args(sc, inds, sc->curlet);
-	  fx_annotate_arg(sc, val, sc->curlet);
-	  set_opt3_pair(form, cdr(inds));
-	  pair_set_syntax_op(form, OP_IMPLICIT_VECTOR_SET_4);
-	}
+          (cdr(form) == sc->code) &&     /* form == cdr(sc->code) only on the outer call, thereafter form is the old form for better error messages */
+          (is_fxable(sc, car(inds))) &&
+          (is_fxable(sc, cadr(inds))) &&
+          (is_fxable(sc, car(val))))     /* (set! (v fx fx) fx) */
+        {
+          fx_annotate_args(sc, inds, sc->curlet);
+          fx_annotate_arg(sc, val, sc->curlet);
+          set_opt3_pair(form, cdr(inds));
+          pair_set_syntax_op(form, OP_IMPLICIT_VECTOR_SET_4);
+        }
       if ((argnum == vector_rank(vect)) &&
-	  (!is_pair(car(val))))
-	{
-	  s7_pointer p;
-	  for (p = inds; is_pair(p); p = cdr(p))
-	    if (is_pair(car(p))) break;
-	  if (is_null(p))
-	    {
-	      s7_pointer pa;
-	      s7_pointer args = safe_list_if_possible(sc, argnum + 2);
-	      if (in_heap(args)) gc_protect_via_stack(sc, args);
-	      set_car(args, vect);
-	      for (p = inds, pa = cdr(args); is_pair(p); p = cdr(p), pa = cdr(pa))
-		{
-		  index = car(p);
-		  if (is_symbol(index))
-		    index = lookup_checked(sc, index);
-		  if (!s7_is_integer(index))
-		    {
-		      if (in_heap(args)) unstack_gc_protect(sc);
-		      error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be an integer: ~S", 41), form));
-		    }
-		  set_car(pa, index);
-		}
-	      set_car(pa, car(val));
-	      if (is_symbol(car(pa)))
-		set_car(pa, lookup_checked(sc, car(pa)));
-	      sc->value = g_vector_set(sc, args);
-	      if (in_heap(args)) unstack_gc_protect(sc);
-	      else clear_list_in_use(args);
-	      return(goto_start);
-	    }}
+          (!is_pair(car(val))))
+        {
+          s7_pointer p;
+          for (p = inds; is_pair(p); p = cdr(p))
+            if (is_pair(car(p))) break;
+          if (is_null(p))
+            {
+              s7_pointer pa;
+              s7_pointer args = safe_list_if_possible(sc, argnum + 2);
+              if (in_heap(args)) gc_protect_via_stack(sc, args);
+              set_car(args, vect);
+              for (p = inds, pa = cdr(args); is_pair(p); p = cdr(p), pa = cdr(pa))
+                {
+                  index = car(p);
+                  if (is_symbol(index))
+                    index = lookup_checked(sc, index);
+                  if (!s7_is_integer(index))
+                    {
+                      if (in_heap(args)) unstack_gc_protect(sc);
+                      error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be an integer: ~S", 41), form));
+                    }
+                  set_car(pa, index);
+                }
+              set_car(pa, car(val));
+              if (is_symbol(car(pa)))
+                set_car(pa, lookup_checked(sc, car(pa)));
+              sc->value = g_vector_set(sc, args);
+              if (in_heap(args)) unstack_gc_protect(sc);
+              else clear_list_in_use(args);
+              return(goto_start);
+            }}
       push_op_stack(sc, sc->vector_set_function); /* vector_setter(vect) has wrong args */
       sc->code = (is_null(cdr(inds))) ? val : ((is_null(cddr(inds))) ? cons(sc, cadr(inds), val) : pair_append(sc, cdr(inds), T_Lst(val))); /* i.e. rest(args) + val */
       push_stack(sc, OP_EVAL_ARGS4, list_1(sc, vect), sc->code);
@@ -80811,23 +80811,23 @@ static goto_t set_implicit_vector(s7_scheme *sc, s7_pointer vect, s7_pointer ind
       s7_pointer value;
 
       if (is_symbol(index))
-	index = lookup_checked(sc, index);
+        index = lookup_checked(sc, index);
       if (!s7_is_integer(index))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be an integer: ~S", 41), sc->code));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "vector-set!: index must be an integer: ~S", 41), sc->code));
       ind = s7_integer_clamped_if_gmp(sc, index);
       if ((ind < 0) || (ind >= vector_length(vect)))
-	out_of_range_error_nr(sc, sc->vector_set_symbol, int_two, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->vector_set_symbol, int_two, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
       value = car(val);
       if (!is_pair(value))
-	{
-	  if (is_symbol(value))
-	    value = lookup_checked(sc, value);
-	  if (is_typed_t_vector(vect))
-	    typed_vector_setter(sc, vect, ind, value);
-	  else vector_setter(vect)(sc, vect, ind, value);
-	  sc->value = T_Ext(value);
-	  return(goto_start);
-	}
+        {
+          if (is_symbol(value))
+            value = lookup_checked(sc, value);
+          if (is_typed_t_vector(vect))
+            typed_vector_setter(sc, vect, ind, value);
+          else vector_setter(vect)(sc, vect, ind, value);
+          sc->value = T_Ext(value);
+          return(goto_start);
+        }
       push_op_stack(sc, sc->vector_set_function);
       sc->args = list_2(sc, index, vect);
       sc->code = val;
@@ -80850,16 +80850,16 @@ static goto_t set_implicit_c_object(s7_scheme *sc, s7_pointer c_obj, s7_pointer
     {
       push_op_stack(sc, sc->c_object_set_function);
       if (is_null(inds))
-	{
-	  push_stack(sc, OP_EVAL_ARGS1, list_1(sc, c_obj), sc->nil);
-	  sc->code = car(val);
-	}
+        {
+          push_stack(sc, OP_EVAL_ARGS1, list_1(sc, c_obj), sc->nil);
+          sc->code = car(val);
+        }
       else
-	{
-	  sc->code = (is_null(cdr(inds))) ? cons(sc, car(inds), val) : pair_append(sc, cdr(inds), T_Lst(val));
-	  push_stack(sc, OP_EVAL_ARGS4, list_1(sc, c_obj), sc->code);
-	  sc->code = car(inds);
-	}
+        {
+          sc->code = (is_null(cdr(inds))) ? cons(sc, car(inds), val) : pair_append(sc, cdr(inds), T_Lst(val));
+          push_stack(sc, OP_EVAL_ARGS4, list_1(sc, c_obj), sc->code);
+          sc->code = car(inds);
+        }
       sc->cur_op = optimize_op(sc->code);
       return(goto_top_no_pop);
     }
@@ -80868,14 +80868,14 @@ static goto_t set_implicit_c_object(s7_scheme *sc, s7_pointer c_obj, s7_pointer
     {
       s7_pointer value = car(val);
       if (is_symbol(index))
-	index = lookup_checked(sc, index);
+        index = lookup_checked(sc, index);
       if (!is_pair(value))
-	{
-	  if (is_symbol(value))
-	    value = lookup_checked(sc, value);
-	  sc->value = (*(c_object_set(sc, c_obj)))(sc, with_list_t3(c_obj, index, value));
-	  return(goto_start);
-	}
+        {
+          if (is_symbol(value))
+            value = lookup_checked(sc, value);
+          sc->value = (*(c_object_set(sc, c_obj)))(sc, with_list_t3(c_obj, index, value));
+          return(goto_start);
+        }
       push_op_stack(sc, sc->c_object_set_function);
       sc->args = list_2(sc, index, c_obj);
       sc->code = val;
@@ -80928,28 +80928,28 @@ static goto_t set_implicit_string(s7_scheme *sc, s7_pointer str, s7_pointer inds
     {
       s7_int ind;
       if (is_symbol(index))
-	index = lookup_checked(sc, index);
+        index = lookup_checked(sc, index);
       if (!s7_is_integer(index))
-	error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "index must be an integer: ~S", 28), form));
+        error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "index must be an integer: ~S", 28), form));
       ind = s7_integer_clamped_if_gmp(sc, index);
       if ((ind < 0) || (ind >= string_length(str)))
-	out_of_range_error_nr(sc, sc->string_set_symbol, int_two, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
+        out_of_range_error_nr(sc, sc->string_set_symbol, int_two, index, (ind < 0) ? it_is_negative_string : it_is_too_large_string);
       if (is_immutable_string(str))
-	immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->string_set_symbol, str));
+        immutable_object_error_nr(sc, set_elist_3(sc, immutable_error_string, sc->string_set_symbol, str));
 
       val = car(val);
       if (!is_pair(val))
-	{
-	  if (is_symbol(val))
-	    val = lookup_checked(sc, val);
-	  if (is_character(val))
-	    {
-	      string_value(str)[ind] = character(val);
-	      sc->value = val;
-	      return(goto_start);
-	    }
-	  error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "value must be a character: ~S", 29), form));
-	}
+        {
+          if (is_symbol(val))
+            val = lookup_checked(sc, val);
+          if (is_character(val))
+            {
+              string_value(str)[ind] = character(val);
+              sc->value = val;
+              return(goto_start);
+            }
+          error_nr(sc, sc->wrong_type_arg_symbol, set_elist_2(sc, wrap_string(sc, "value must be a character: ~S", 29), form));
+        }
       /* maybe op_implicit_string_set_a as in vector someday, but this code isn't (currently) called much */
       push_op_stack(sc, sc->string_set_function);
       sc->args = list_2(sc, index, str);
@@ -80978,13 +80978,13 @@ static goto_t set_implicit_pair(s7_scheme *sc, s7_pointer lst, s7_pointer inds,
     {
       /* split (set! (a b c...) v) into (set! ((a b) c ...) v), eval (a b), return (let ((L (list (list 1 2)))) (set! (L 0 0) 3) L) */
       if (index_val)
-	{
-	  s7_pointer obj = list_ref_1(sc, lst, index_val);
-	  if (!is_applicable(obj))
-	    error_nr(sc, sc->no_setter_symbol,
-		     set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~$) is ~S which can't take arguments", 47), form, lst, index_val, obj));
-	  return(call_set_implicit(sc, obj, cdr(inds), val, form));
-	}
+        {
+          s7_pointer obj = list_ref_1(sc, lst, index_val);
+          if (!is_applicable(obj))
+            error_nr(sc, sc->no_setter_symbol,
+                     set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~$) is ~S which can't take arguments", 47), form, lst, index_val, obj));
+          return(call_set_implicit(sc, obj, cdr(inds), val, form));
+        }
       push_stack(sc, OP_SET2, cdr(inds), val);            /* (let ((L (list (list 1 2 3)))) (set! (L (- (length L) 1) 2) 0) L) */
       sc->code = list_2(sc, caadr(form), car(inds));
       return(goto_unopt);
@@ -80992,12 +80992,12 @@ static goto_t set_implicit_pair(s7_scheme *sc, s7_pointer lst, s7_pointer inds,
   if (index_val)
     {
       if (!is_pair(value))
-	{
-	  set_car(sc->t2_1, index_val);
-	  set_car(sc->t2_2, (is_symbol(value)) ? lookup_checked(sc, value) : value);
-	  sc->value = g_list_set_1(sc, lst, sc->t2_1, 2);
-	  return(goto_start);
-	}
+        {
+          set_car(sc->t2_1, index_val);
+          set_car(sc->t2_2, (is_symbol(value)) ? lookup_checked(sc, value) : value);
+          sc->value = g_list_set_1(sc, lst, sc->t2_1, 2);
+          return(goto_start);
+        }
       push_op_stack(sc, sc->list_set_function); /* because cdr(inds) is nil, we're definitely calling list_set */
       sc->args = list_2(sc, index_val, lst);                     /* plist unsafe here */
       sc->code = val;
@@ -81023,28 +81023,28 @@ static goto_t set_implicit_hash_table(s7_scheme *sc, s7_pointer table, s7_pointe
   if (is_pair(key))
     {
       if (is_quote(car(key)))
-	keyval = cadr(key);
+        keyval = cadr(key);
     }
   else keyval = (is_normal_symbol(key)) ? lookup_checked(sc, key) : key;
 
   if (!is_null(cdr(inds)))
     {
       if (keyval)
-	{
-	  s7_pointer obj = s7_hash_table_ref(sc, table, keyval);
-	  if (obj == sc->F)                           /* (let ((h (hash-table 'b 1))) (set! (h 'a 'asdf) 32)) */
-	    error_nr(sc, sc->syntax_error_symbol,
-		     set_elist_4(sc, wrap_string(sc, "in ~S, ~$ does not exist in ~S", 30), form, keyval, table));
-	  else
-	    if (!is_applicable(obj))                  /* (let ((h (hash-table 'b 1))) (set! (h 'b 'asdf) 32)) */
-	      error_nr(sc, sc->no_setter_symbol,
-		       set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~$) is ~S which can't take arguments", 47), form, table, keyval, obj));
-	  /* (let ((v (hash-table 'a (hash-table 'b 1)))) (set! (v 'a 'b 'b) 32) v) ->
-	   *    error: in (set! (v 'a 'b 'b) 32), ((hash-table 'b 1) 'b) is 1 which can't take arguments
-	   * (let ((v (hash-table 'a (list 1 2)))) (set! (v 'a 1) 5)) -> code: (set! ((1 2) 1) 5) -> 5 (v: (hash-table 'a (1 5)))
-	   */
-	  return(call_set_implicit(sc, obj, cdr(inds), val, form));
-	}
+        {
+          s7_pointer obj = s7_hash_table_ref(sc, table, keyval);
+          if (obj == sc->F)                           /* (let ((h (hash-table 'b 1))) (set! (h 'a 'asdf) 32)) */
+            error_nr(sc, sc->syntax_error_symbol,
+                     set_elist_4(sc, wrap_string(sc, "in ~S, ~$ does not exist in ~S", 30), form, keyval, table));
+          else
+            if (!is_applicable(obj))                  /* (let ((h (hash-table 'b 1))) (set! (h 'b 'asdf) 32)) */
+              error_nr(sc, sc->no_setter_symbol,
+                       set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~$) is ~S which can't take arguments", 47), form, table, keyval, obj));
+          /* (let ((v (hash-table 'a (hash-table 'b 1)))) (set! (v 'a 'b 'b) 32) v) ->
+           *    error: in (set! (v 'a 'b 'b) 32), ((hash-table 'b 1) 'b) is 1 which can't take arguments
+           * (let ((v (hash-table 'a (list 1 2)))) (set! (v 'a 1) 5)) -> code: (set! ((1 2) 1) 5) -> 5 (v: (hash-table 'a (1 5)))
+           */
+          return(call_set_implicit(sc, obj, cdr(inds), val, form));
+        }
       push_stack(sc, OP_SET2, cdr(inds), val); /* (let ((L (hash-table 'b (hash-table 'a 1)))) (set! (L (symbol "b") (symbol "a")) 0) L) */
       sc->code = list_2(sc, caadr(form), key);  /* plist unsafe */
       return(goto_unopt);
@@ -81053,17 +81053,17 @@ static goto_t set_implicit_hash_table(s7_scheme *sc, s7_pointer table, s7_pointe
     {
       s7_pointer value = car(val);
       if (is_pair(value))
-	{
-	  if (is_quote(car(value)))
-	    {
-	      sc->value = s7_hash_table_set(sc, table, keyval, cadr(value));
-	      return(goto_start);
-	    }}
+        {
+          if (is_quote(car(value)))
+            {
+              sc->value = s7_hash_table_set(sc, table, keyval, cadr(value));
+              return(goto_start);
+            }}
       else
-	{
-	  sc->value = s7_hash_table_set(sc, table, keyval, (is_normal_symbol(value)) ? lookup_checked(sc, value) : value);
-	  return(goto_start);
-	}
+        {
+          sc->value = s7_hash_table_set(sc, table, keyval, (is_normal_symbol(value)) ? lookup_checked(sc, value) : value);
+          return(goto_start);
+        }
       push_op_stack(sc, sc->hash_table_set_function); /* because cdr(inds) is nil, we're definitely calling hash_table_set */
       sc->args = list_2(sc, keyval, table);                        /* plist unsafe here */
       sc->code = val;
@@ -81087,20 +81087,20 @@ static goto_t set_implicit_let(s7_scheme *sc, s7_pointer let, s7_pointer inds, s
   if (is_pair(sym))
     {
       if (is_quote(car(sym)))
-	symval = cadr(sym);
+        symval = cadr(sym);
     }
   else symval = (is_normal_symbol(sym)) ? lookup_checked(sc, sym) : sym;
 
   if (!is_null(cdr(inds)))
     {
       if (symval)
-	{
-	  s7_pointer obj = let_ref(sc, let, symval);
-	  if (!is_applicable(obj))              /* (let ((h (hash-table 'b 1))) (set! (h 'b 'asdf) 32)) */
-	    error_nr(sc, sc->no_setter_symbol,
-		     set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~$) is ~S which can't take arguments", 47), form, let, symval, obj));
-	  return(call_set_implicit(sc, obj, cdr(inds), val, form));
-	}
+        {
+          s7_pointer obj = let_ref(sc, let, symval);
+          if (!is_applicable(obj))              /* (let ((h (hash-table 'b 1))) (set! (h 'b 'asdf) 32)) */
+            error_nr(sc, sc->no_setter_symbol,
+                     set_elist_5(sc, wrap_string(sc, "in ~S, (~S ~$) is ~S which can't take arguments", 47), form, let, symval, obj));
+          return(call_set_implicit(sc, obj, cdr(inds), val, form));
+        }
       push_stack(sc, OP_SET2, cdr(inds), val);
       sc->code = list_2(sc, let, car(inds));
       return(goto_unopt);
@@ -81109,12 +81109,12 @@ static goto_t set_implicit_let(s7_scheme *sc, s7_pointer let, s7_pointer inds, s
     {
       s7_pointer value = car(val);
       if (!is_pair(value))
-	{
-	  if (is_symbol(value))
-	    value = lookup_checked(sc, value);
-	  sc->value = let_set_2(sc, let, symval, value);
-	  return(goto_start);
-	}
+        {
+          if (is_symbol(value))
+            value = lookup_checked(sc, value);
+          sc->value = let_set_2(sc, let, symval, value);
+          return(goto_start);
+        }
       push_op_stack(sc, sc->let_set_function);
       sc->args = list_2(sc, symval, let);
       sc->code = val;
@@ -81132,7 +81132,7 @@ static goto_t set_implicit_c_function(s7_scheme *sc, s7_pointer fnc)  /* (let ((
   if (!is_t_procedure(c_function_setter(fnc)))
     {
       if (!is_any_macro(c_function_setter(fnc)))
-	no_setter_error_nr(sc, fnc);
+        no_setter_error_nr(sc, fnc);
       sc->args = (is_null(cdar(sc->code))) ? cdr(sc->code) :
                   ((is_null(cddar(sc->code))) ? cons(sc, cadar(sc->code), cdr(sc->code)) : pair_append(sc, cdar(sc->code), cdr(sc->code)));
       sc->code = c_function_setter(fnc);
@@ -81148,13 +81148,13 @@ static goto_t set_implicit_c_function(s7_scheme *sc, s7_pointer fnc)  /* (let ((
   else
     {
       if (is_null(cddar(sc->code)))                          /* (set! (fnc ind) val) */
-	push_stack(sc, OP_EVAL_SET2, cadr(sc->code), c_function_setter(fnc));
+        push_stack(sc, OP_EVAL_SET2, cadr(sc->code), c_function_setter(fnc));
       else
-	{
-	  push_op_stack(sc, c_function_setter(fnc));
-	  sc->value = pair_append(sc, cddar(sc->code), cdr(sc->code));
-	  push_stack(sc, OP_EVAL_SET3, sc->nil, sc->value); /* args=evalled, code=unevalled */
-	}
+        {
+          push_op_stack(sc, c_function_setter(fnc));
+          sc->value = pair_append(sc, cddar(sc->code), cdr(sc->code));
+          push_stack(sc, OP_EVAL_SET3, sc->nil, sc->value); /* args=evalled, code=unevalled */
+        }
       sc->code = cadar(sc->code);
     }
   sc->cur_op = optimize_op(sc->code);
@@ -81169,7 +81169,7 @@ static goto_t set_implicit_closure(s7_scheme *sc, s7_pointer fnc)
   if (!is_t_procedure(setter))
     {
       if (!is_any_macro(setter))
-	no_setter_error_nr(sc, fnc);
+        no_setter_error_nr(sc, fnc);
       sc->args = (is_null(cdar(sc->code))) ? cdr(sc->code) :
                   ((is_null(cddar(sc->code))) ? cons(sc, cadar(sc->code), cdr(sc->code)) : pair_append(sc, cdar(sc->code), cdr(sc->code)));
       sc->code = setter;
@@ -81183,13 +81183,13 @@ static goto_t set_implicit_closure(s7_scheme *sc, s7_pointer fnc)
   else
     {
       if (is_null(cddar(sc->code)))                        /* (set! (fnc ind) val) */
-	push_stack(sc, OP_EVAL_SET2, cadr(sc->code), setter);
+        push_stack(sc, OP_EVAL_SET2, cadr(sc->code), setter);
       else                                                 /* (set! (fnc inds ...) val) */
-	{
-	  push_op_stack(sc, setter);
-	  sc->value = pair_append(sc, cddar(sc->code), cdr(sc->code));
-	  push_stack(sc, OP_EVAL_SET3, sc->nil, sc->value); /* args=evalled, code=unevalled */
-	}
+        {
+          push_op_stack(sc, setter);
+          sc->value = pair_append(sc, cddar(sc->code), cdr(sc->code));
+          push_stack(sc, OP_EVAL_SET3, sc->nil, sc->value); /* args=evalled, code=unevalled */
+        }
       sc->code = cadar(sc->code); /* "ind" above */
     }
   sc->cur_op = optimize_op(sc->code);
@@ -81206,7 +81206,7 @@ static goto_t set_implicit_iterator(s7_scheme *sc, s7_pointer iter)
 
   if (!is_null(cdar(sc->code))) /* (set! (iter ...) val) but iter is a thunk */
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_3(sc, wrap_string(sc, "~S (an iterator): too many arguments: ~S", 40), iter, sc->code));
+             set_elist_3(sc, wrap_string(sc, "~S (an iterator): too many arguments: ~S", 40), iter, sc->code));
 
   if (is_procedure(setter))
     {
@@ -81263,12 +81263,12 @@ static goto_t call_set_implicit(s7_scheme *sc, s7_pointer obj, s7_pointer inds,
 
     default:                    /* (set! (1 2) 3) */
       if (is_applicable(obj))
-	no_setter_error_nr(sc, obj); /* this is reachable if obj is a goto or continuation: (set! (go 1) 2) in s7test.scm */
+        no_setter_error_nr(sc, obj); /* this is reachable if obj is a goto or continuation: (set! (go 1) 2) in s7test.scm */
       error_nr(sc, sc->no_setter_symbol,
-	       list_3(sc, wrap_string(sc, "in ~S, ~S has no setter", 23),
-		      cons_unchecked(sc, sc->set_symbol,       /* copy_tree(sc, form) also works but copies too much: we want to copy the ulists */
-				     cons(sc, copy_proper_list(sc, cadr(form)), cddr(form))),
-		      obj));
+               list_3(sc, wrap_string(sc, "in ~S, ~S has no setter", 23),
+                      cons_unchecked(sc, sc->set_symbol,       /* copy_tree(sc, form) also works but copies too much: we want to copy the ulists */
+                                     cons(sc, copy_proper_list(sc, cadr(form)), cddr(form))),
+                      obj));
     }
   return(goto_top_no_pop);
 }
@@ -81288,10 +81288,10 @@ static goto_t set_implicit(s7_scheme *sc) /* sc->code incoming is (set! (...) ..
       obj = caar_code;
     else
       {
-	push_stack(sc, OP_SET2, cdar(sc->code), T_Pair(cdr(sc->code)));
-	sc->code = caar_code;
-	sc->cur_op = optimize_op(sc->code);
-	return(goto_top_no_pop);
+        push_stack(sc, OP_SET2, cdar(sc->code), T_Pair(cdr(sc->code)));
+        sc->code = caar_code;
+        sc->cur_op = optimize_op(sc->code);
+        return(goto_top_no_pop);
       }
   /* code here is the setter and the value without the "set!": ((window-width) 800), (set! (hi 0) (* 2 3)) -> ((hi 0) (* 2 3)) */
   /* for gmp case, indices need to be decoded via s7_integer, not just integer */
@@ -81302,10 +81302,10 @@ static noreturn void set_with_let_error_nr(s7_scheme *sc)
 {
   s7_pointer target = cadr(sc->code), value = caddr(sc->code);
   error_nr(sc, sc->no_setter_symbol,
-	   set_elist_3(sc, wrap_string(sc, "can't set ~A in ~S", 18), target,
-		       list_3(sc, sc->set_symbol,
-			      (is_pair(target)) ? copy_proper_list(sc, target) : target,
-			      (is_pair(value)) ? copy_proper_list(sc, value) : value)));
+           set_elist_3(sc, wrap_string(sc, "can't set ~A in ~S", 18), target,
+                       list_3(sc, sc->set_symbol,
+                              (is_pair(target)) ? copy_proper_list(sc, target) : target,
+                              (is_pair(value)) ? copy_proper_list(sc, value) : value)));
 }
 
 static goto_t op_set2(s7_scheme *sc)
@@ -81323,20 +81323,20 @@ static goto_t op_set2(s7_scheme *sc)
        *   (let ((L '((1 2 3))) (index 1)) (set! ((L 0) index) 32) L)
        */
       if (!s7_is_proper_list(sc, sc->args))        /* (set! ('(1 2) 1 . 2) 1) */
-	syntax_error_nr(sc, "set! target arguments are an improper list: ~A", 46, sc->args);
+        syntax_error_nr(sc, "set! target arguments are an improper list: ~A", 46, sc->args);
       if (is_multiple_value(sc->value))            /* (set! ((values fnc 0)) 32) etc */
-	{
-	  if (is_null(sc->args))
-	    { /* can't assume we're in list-set! here -- first value is target */
-	      sc->code = list_3(sc, sc->set_symbol, multiple_value(sc->value), car(sc->code));
-	      return(goto_eval);
-	    }
-	  else   /* this has to be at least 2 args, sc->args and sc->code make 2 more, so... */
-	    syntax_error_nr(sc, "set!: too many arguments: ~S", 28,
-			    set_ulist_1(sc, sc->set_symbol, pair_append(sc, multiple_value(sc->value), pair_append(sc, sc->args, T_Lst(sc->code)))));
-	}
+        {
+          if (is_null(sc->args))
+            { /* can't assume we're in list-set! here -- first value is target */
+              sc->code = list_3(sc, sc->set_symbol, multiple_value(sc->value), car(sc->code));
+              return(goto_eval);
+            }
+          else   /* this has to be at least 2 args, sc->args and sc->code make 2 more, so... */
+            syntax_error_nr(sc, "set!: too many arguments: ~S", 28,
+                            set_ulist_1(sc, sc->set_symbol, pair_append(sc, multiple_value(sc->value), pair_append(sc, sc->args, T_Lst(sc->code)))));
+        }
       if (is_null(sc->args))
-	syntax_error_nr(sc, "list set!: not enough arguments: ~S", 35, sc->code);
+        syntax_error_nr(sc, "list set!: not enough arguments: ~S", 35, sc->code);
       push_op_stack(sc, sc->list_set_function);
       if (!is_null(cdr(sc->args))) sc->code = pair_append(sc, cdr(sc->args), T_Lst(sc->code));
       push_stack(sc, OP_EVAL_ARGS4, list_1(sc, sc->value), T_Pair(sc->code));
@@ -81350,7 +81350,7 @@ static goto_t op_set2(s7_scheme *sc)
        * bad case when args is nil: (let ((L #(#(1 2 3) #(4 5 6)))) (set! ((L 1)) 32) L)
        */
       if (sc->args == sc->nil)
-	syntax_error_nr(sc, "vector set!: not enough arguments: ~S", 37, sc->code);
+        syntax_error_nr(sc, "vector set!: not enough arguments: ~S", 37, sc->code);
       push_op_stack(sc, sc->vector_set_function);
       if (!is_null(cdr(sc->args))) sc->code = pair_append(sc, cdr(sc->args), T_Lst(sc->code));
       push_stack(sc, OP_EVAL_ARGS4, list_1(sc, sc->value), T_Pair(sc->code));
@@ -81374,9 +81374,9 @@ static bool safe_stepper_expr(s7_pointer expr, const s7_pointer var)
   if (is_pair(p))
     {
       if ((is_optimized(p)) &&
-	  (op_has_hop(p)) &&
-	  (is_safe_c_op(optimize_op(p))))
-	return(true);
+          (op_has_hop(p)) &&
+          (is_safe_c_op(optimize_op(p))))
+        return(true);
       if (car(p) == var) return(false);
     }
   else
@@ -81389,7 +81389,7 @@ static bool tree_match(s7_pointer tree)
   if (is_symbol(tree))
     return(is_matched_symbol(tree));
   return((is_pair(tree)) &&
-	 ((tree_match(car(tree))) || (tree_match(cdr(tree)))));
+         ((tree_match(car(tree))) || (tree_match(cdr(tree)))));
 }
 
 static bool all_ints_here(s7_scheme *sc, s7_pointer settee, s7_pointer expr, s7_pointer step_vars) /* see also all_integers above */
@@ -81403,14 +81403,14 @@ static bool all_ints_here(s7_scheme *sc, s7_pointer settee, s7_pointer expr, s7_
       s7_pointer val;
       if (expr == settee) return(true);
       for (s7_pointer step = step_vars; is_pair(step); step = cdr(step))
-	if (caar(step) == expr)
-	  {
-	    if (!all_ints_here(sc, caar(step), cadar(step), step_vars)) /* TODO: can we lookup step_vars here? or only in do_is_safe? */
-	      return(false);
-	    if (is_pair(cddar(step)))
-	      return(all_ints_here(sc, caar(step), caddar(step), step_vars));
-	    return(true);
-	  }
+        if (caar(step) == expr)
+          {
+            if (!all_ints_here(sc, caar(step), cadar(step), step_vars)) /* TODO: can we lookup step_vars here? or only in do_is_safe? */
+              return(false);
+            if (is_pair(cddar(step)))
+              return(all_ints_here(sc, caar(step), caddar(step), step_vars));
+            return(true);
+          }
       val = lookup_unexamined(sc, expr);
       return((val) && (is_t_integer(val)));
     }
@@ -81429,7 +81429,7 @@ static bool all_ints_here(s7_scheme *sc, s7_pointer settee, s7_pointer expr, s7_
   if ((is_pair(sig)) &&
       ((car(sig) == sc->is_integer_symbol) || (car(sig) == sc->is_byte_symbol) ||
        ((is_pair(car(sig))) &&
-	((direct_memq(sc->is_integer_symbol, car(sig))) || (direct_memq(sc->is_byte_symbol, car(sig)))))))
+        ((direct_memq(sc->is_integer_symbol, car(sig))) || (direct_memq(sc->is_byte_symbol, car(sig)))))))
     return(true); /* like int-vector or length */
   if (!is_all_integer(car(expr))) return(false);
   for (s7_pointer p = cdr(expr); is_pair(p); p = cdr(p))
@@ -81449,225 +81449,225 @@ static bool do_is_safe(s7_scheme *sc, s7_pointer body, s7_pointer stepper, s7_po
     {
       s7_pointer expr = car(p);
       if (is_pair(expr))
-	{
-	  s7_pointer x = car(expr);
-
-	  if ((!is_symbol(x)) && (!is_safe_c_function(x)) && (x != sc->quote_function))
-	    return(false);
-	  /* car(expr) ("x") is not a symbol: ((mus-data loc) chan) for example, but that's actually safe since it's
-	   * just in effect vector-ref, there are several examples in dlocsig: ((group-speakers group) i) etc
-	   */
-
-	  if (is_symbol_and_syntactic(x))
-	    {
-	      s7_pointer func = global_value(x), vars, cp;
-	      opcode_t op = syntax_opcode(func);
-	      switch (op)
-		{
-		case OP_MACROEXPAND:
-		  return(false);
-
-		case OP_QUOTE:
-		  if ((!is_pair(cdr(expr))) || (!is_null(cddr(expr))))  /* (quote . 1) or (quote 1 2) etc */
-		    return(false);
-		  break;
-
-		case OP_LET:    case OP_LET_STAR:
-		case OP_LETREC: case OP_LETREC_STAR:
-		  if ((!is_pair(cdr(expr))) ||
-		      (!is_list(cadr(expr))) ||
-		      (!is_pair(cddr(expr))))
-		    return(false);
-		  cp = var_list;
-		  for (vars = cadr(expr); is_pair(vars); vars = cdr(vars))
-		    {
-		      s7_pointer var;
-		      if (!is_pair(car(vars))) return(false);
-		      var = caar(vars);
-		      if (direct_memq(var, ((op == OP_LET) || (op == OP_LETREC)) ? cp : var_list)) return(false);
-		      if ((!is_symbol(var)) || (is_keyword(var))) return(false);
-		      cp = cons(sc, var, cp);
-		      sc->x = cp;
-		    }
-		  sc->x = sc->unused;
-		  if (!do_is_safe(sc, cddr(expr), stepper, cp, step_vars, has_set)) return(false);
-		  break;
-
-		case OP_DO:
-		  {
-		    s7_pointer combined_vars;
-		    if ((!is_pair(cdr(expr))) || (!is_pair(cddr(expr))))  /* (do) or (do (...)) */
-		      return(false);
-		    cp = var_list;
-		    sc->w = (is_pair(cadr(expr))) ? pair_append(sc, cadr(expr), step_vars) : step_vars;
-		    combined_vars = sc->w;
-		    for (vars = cadr(expr); is_pair(vars); vars = cdr(vars))
-		      {
-			s7_pointer var;
-			if (!is_pair(car(vars))) return(false);
-			var = caar(vars);
-			if ((direct_memq(var, cp)) || (var == stepper)) return(false);
-			cp = cons(sc, var, cp);
-			sc->x = cp;
-			if ((is_pair(cdar(vars))) &&
-			    (!do_is_safe(sc, cdar(vars), stepper, cp, combined_vars, has_set)))
-			  {
-			    sc->x = sc->unused;
-			    return(false);
-			  }}
-		    sc->x = sc->unused;
-		    if (!do_is_safe(sc, caddr(expr), stepper, cp, combined_vars, has_set)) return(false);
-		    if ((is_pair(cdddr(expr))) &&
-			(!do_is_safe(sc, cadddr(expr), stepper, cp, combined_vars, has_set)))
-		      return(false);
-		  }
-		  break;
-
-		case OP_SET:
-		  {
-		    s7_pointer settee;
-		    if ((!is_pair(cdr(expr))) || (!is_pair(cddr(expr))))  /* (set!) or (set! x) */
-		      return(false);
-		    settee = cadr(expr);
-		    if (!is_symbol(settee))             /* (set! (...) ...) which is tricky due to setter functions/macros */
-		      {
-			s7_pointer setv;
-			if ((!is_pair(settee)) || (!is_symbol(car(settee))))
-			  return(false);
-			setv = lookup_unexamined(sc, car(settee));
-			if (!((setv) &&
-			      ((is_sequence(setv)) ||
-			       ((is_c_function(setv)) &&
-				(is_safe_procedure(c_function_setter(setv)))))))
-			  return(false);
-
-			/* if ((has_set) && (!is_sequence(setv))) (*has_set) = true; */
-			/*    ^ trouble in tmock.scm (opt2_fn not set) -- apparently op_simple_do assumes has_fn which set! lacks */
-			if (has_set) (*has_set) = true;
-		      }
-		    else
-		      {
-			s7_pointer end_and_result = caddr(sc->code);
-			if ((is_pair(end_and_result)) &&        /* sc->code = do-form (formerly (cdr(do-form)) causing a bug here) */
-			    (is_pair(car(end_and_result))) &&
-			    (!is_syntax(caar(end_and_result)))) /* 10-Jan-24 */
-			  {
-			    bool res;
-			    set_match_symbol(settee);
-			    res = tree_match(car(end_and_result));  /* (set! end ...) in some fashion */
-			    clear_match_symbol(settee);
-			    if (res) return(false);
-			  }
-			if (!direct_memq(settee, var_list)) /* is some local variable being set? */
-			  {
-			    s7_pointer val = lookup_unexamined(sc, settee);
-			    if (has_set) (*has_set) = true;
-			    if ((val) && (is_t_integer(val)) && (!all_ints_here(sc, settee, caddr(expr), step_vars)))
-			      return(false);
-			  }}
-		    if (!do_is_safe(sc, cddr(expr), stepper, var_list, step_vars, has_set))
-		      return(false);
-		    if (!safe_stepper_expr(expr, stepper))      /* is step var's value used as the stored value by set!? */
-		      return(false);
-		  }
-		  break;
-
-		case OP_LET_TEMPORARILY:
-		  if ((!is_pair(cdr(expr))) ||
-		      (!is_pair(cadr(expr))) ||
-		      (!is_pair(cddr(expr))))
-		    return(false);
-		  for (cp = cadr(expr); is_pair(cp); cp = cdr(cp))
-		    if ((!is_pair(car(cp))) ||
-			(!is_pair(cdar(cp))) ||
-			(!do_is_safe(sc, cdar(cp), stepper, var_list, step_vars, has_set)))
-		      return(false);
-		  if (!do_is_safe(sc, cddr(expr), stepper, var_list, step_vars, has_set)) return(false);
-		  break;
-
-		case OP_COND:
-		  for (cp = cdr(expr); is_pair(cp); cp = cdr(cp))
-		    if (!do_is_safe(sc, car(cp), stepper, var_list, step_vars, has_set))
-		      return(false);
-		  break;
-
-		case OP_CASE:
-		  if ((!is_pair(cdr(expr))) ||
-		      (!do_is_safe(sc, cadr(expr), stepper, var_list, step_vars, has_set)))
-		    return(false);
-		  for (cp = cddr(expr); is_pair(cp); cp = cdr(cp))
-		    if ((!is_pair(car(cp))) ||      /* (case x #(123)...) */
-			(!do_is_safe(sc, cdar(cp), stepper, var_list, step_vars, has_set)))
-		      return(false);
-		  break;
-
-		case OP_IF: case OP_WHEN: case OP_UNLESS:
-		case OP_AND: case OP_OR: case OP_BEGIN:
-		case OP_WITH_BAFFLE:
-		  if (!do_is_safe(sc, cdr(expr), stepper, var_list, step_vars, has_set))
-		    return(false);
-		  break;
-
-		case OP_WITH_LET:
-		  return(false); /* 11-Jan-24, this was true!? */
-
-		default:
-		  return(false);
-		}} /* is_syntax(x=car(expr)) */
-	  else
-	    if (x == sc->quote_function)
-	      {
-		if ((!is_pair(cdr(expr))) || (!is_null(cddr(expr))))  /* (#_quote . 1) or (#_quote 1 2) etc */
-		  return(false);
-	      }
-	    else
-	      {
-		/* if a macro, we'll eventually expand it (if *_optimize), but that requires a symbol lookup here and macroexpand */
-		if ((!is_optimized(expr)) ||
-		    (optimize_op(expr) == OP_UNKNOWN_NP) ||
-		    (!do_is_safe(sc, cdr(expr), stepper, var_list, step_vars, has_set)))
-		  return(false);
-
-		/* is this still needed? fx_c_optcq bug -- tests seem ok without it -- 3.5 in tmat */
-		if ((is_symbol(x)) && (is_slot(global_slot(x))) && (is_syntax(global_value(x)))) /* maybe (x == sc->immutable_symbol)? */
-		  return(false); /* syntax hidden behind some other name */
-
-		if ((is_symbol(x)) && (is_setter(x)))             /* "setter" includes stuff like cons and vector -- x is a symbol */
-		  {
-		    /* (hash-table-set! ht i 0) -- caddr is being saved, so this is not safe
-		     *   similarly (vector-set! v 0 i) etc
-		     */
-		    if (is_null(cdr(expr)))
-		      {
-			if (is_null(cdr(p)))                    /* (vector) for example */
-			  return((x == sc->vector_symbol) || (x == sc->list_symbol) || (x == sc->string_symbol));
-		      }
-		    else
-		      {
-			if ((has_set) &&
-			    (!direct_memq(cadr(expr), var_list)) &&   /* non-local is being changed */
-			    ((cadr(expr) == stepper) ||               /* stepper is being set? */
-			     (!is_pair(cddr(expr))) ||
-			     (!is_pair(cdddr(expr))) ||
-			     (is_pair(cddddr(expr))) ||
-			     ((x == sc->hash_table_set_symbol) && (caddr(expr) == stepper)) ||
-			     (cadddr(expr) == stepper) ||             /* used to check is_symbol here and above but that's unnecessary */
-			     ((is_pair(cadddr(expr))) && (s7_tree_memq(sc, stepper, cadddr(expr))))))
-			  (*has_set) = true;
-
-			if (!do_is_safe(sc, cddr(expr), stepper, var_list, step_vars, has_set))
-			  return(false);
-			if (!safe_stepper_expr(expr, stepper))
-			  return(false);
-		      }}}}}
+        {
+          s7_pointer x = car(expr);
+
+          if ((!is_symbol(x)) && (!is_safe_c_function(x)) && (x != sc->quote_function))
+            return(false);
+          /* car(expr) ("x") is not a symbol: ((mus-data loc) chan) for example, but that's actually safe since it's
+           * just in effect vector-ref, there are several examples in dlocsig: ((group-speakers group) i) etc
+           */
+
+          if (is_symbol_and_syntactic(x))
+            {
+              s7_pointer func = global_value(x), vars, cp;
+              opcode_t op = syntax_opcode(func);
+              switch (op)
+                {
+                case OP_MACROEXPAND:
+                  return(false);
+
+                case OP_QUOTE:
+                  if ((!is_pair(cdr(expr))) || (!is_null(cddr(expr))))  /* (quote . 1) or (quote 1 2) etc */
+                    return(false);
+                  break;
+
+                case OP_LET:    case OP_LET_STAR:
+                case OP_LETREC: case OP_LETREC_STAR:
+                  if ((!is_pair(cdr(expr))) ||
+                      (!is_list(cadr(expr))) ||
+                      (!is_pair(cddr(expr))))
+                    return(false);
+                  cp = var_list;
+                  for (vars = cadr(expr); is_pair(vars); vars = cdr(vars))
+                    {
+                      s7_pointer var;
+                      if (!is_pair(car(vars))) return(false);
+                      var = caar(vars);
+                      if (direct_memq(var, ((op == OP_LET) || (op == OP_LETREC)) ? cp : var_list)) return(false);
+                      if ((!is_symbol(var)) || (is_keyword(var))) return(false);
+                      cp = cons(sc, var, cp);
+                      sc->x = cp;
+                    }
+                  sc->x = sc->unused;
+                  if (!do_is_safe(sc, cddr(expr), stepper, cp, step_vars, has_set)) return(false);
+                  break;
+
+                case OP_DO:
+                  {
+                    s7_pointer combined_vars;
+                    if ((!is_pair(cdr(expr))) || (!is_pair(cddr(expr))))  /* (do) or (do (...)) */
+                      return(false);
+                    cp = var_list;
+                    sc->w = (is_pair(cadr(expr))) ? pair_append(sc, cadr(expr), step_vars) : step_vars;
+                    combined_vars = sc->w;
+                    for (vars = cadr(expr); is_pair(vars); vars = cdr(vars))
+                      {
+                        s7_pointer var;
+                        if (!is_pair(car(vars))) return(false);
+                        var = caar(vars);
+                        if ((direct_memq(var, cp)) || (var == stepper)) return(false);
+                        cp = cons(sc, var, cp);
+                        sc->x = cp;
+                        if ((is_pair(cdar(vars))) &&
+                            (!do_is_safe(sc, cdar(vars), stepper, cp, combined_vars, has_set)))
+                          {
+                            sc->x = sc->unused;
+                            return(false);
+                          }}
+                    sc->x = sc->unused;
+                    if (!do_is_safe(sc, caddr(expr), stepper, cp, combined_vars, has_set)) return(false);
+                    if ((is_pair(cdddr(expr))) &&
+                        (!do_is_safe(sc, cadddr(expr), stepper, cp, combined_vars, has_set)))
+                      return(false);
+                  }
+                  break;
+
+                case OP_SET:
+                  {
+                    s7_pointer settee;
+                    if ((!is_pair(cdr(expr))) || (!is_pair(cddr(expr))))  /* (set!) or (set! x) */
+                      return(false);
+                    settee = cadr(expr);
+                    if (!is_symbol(settee))             /* (set! (...) ...) which is tricky due to setter functions/macros */
+                      {
+                        s7_pointer setv;
+                        if ((!is_pair(settee)) || (!is_symbol(car(settee))))
+                          return(false);
+                        setv = lookup_unexamined(sc, car(settee));
+                        if (!((setv) &&
+                              ((is_sequence(setv)) ||
+                               ((is_c_function(setv)) &&
+                                (is_safe_procedure(c_function_setter(setv)))))))
+                          return(false);
+
+                        /* if ((has_set) && (!is_sequence(setv))) (*has_set) = true; */
+                        /*    ^ trouble in tmock.scm (opt2_fn not set) -- apparently op_simple_do assumes has_fn which set! lacks */
+                        if (has_set) (*has_set) = true;
+                      }
+                    else
+                      {
+                        s7_pointer end_and_result = caddr(sc->code);
+                        if ((is_pair(end_and_result)) &&        /* sc->code = do-form (formerly (cdr(do-form)) causing a bug here) */
+                            (is_pair(car(end_and_result))) &&
+                            (!is_syntax(caar(end_and_result)))) /* 10-Jan-24 */
+                          {
+                            bool res;
+                            set_match_symbol(settee);
+                            res = tree_match(car(end_and_result));  /* (set! end ...) in some fashion */
+                            clear_match_symbol(settee);
+                            if (res) return(false);
+                          }
+                        if (!direct_memq(settee, var_list)) /* is some local variable being set? */
+                          {
+                            s7_pointer val = lookup_unexamined(sc, settee);
+                            if (has_set) (*has_set) = true;
+                            if ((val) && (is_t_integer(val)) && (!all_ints_here(sc, settee, caddr(expr), step_vars)))
+                              return(false);
+                          }}
+                    if (!do_is_safe(sc, cddr(expr), stepper, var_list, step_vars, has_set))
+                      return(false);
+                    if (!safe_stepper_expr(expr, stepper))      /* is step var's value used as the stored value by set!? */
+                      return(false);
+                  }
+                  break;
+
+                case OP_LET_TEMPORARILY:
+                  if ((!is_pair(cdr(expr))) ||
+                      (!is_pair(cadr(expr))) ||
+                      (!is_pair(cddr(expr))))
+                    return(false);
+                  for (cp = cadr(expr); is_pair(cp); cp = cdr(cp))
+                    if ((!is_pair(car(cp))) ||
+                        (!is_pair(cdar(cp))) ||
+                        (!do_is_safe(sc, cdar(cp), stepper, var_list, step_vars, has_set)))
+                      return(false);
+                  if (!do_is_safe(sc, cddr(expr), stepper, var_list, step_vars, has_set)) return(false);
+                  break;
+
+                case OP_COND:
+                  for (cp = cdr(expr); is_pair(cp); cp = cdr(cp))
+                    if (!do_is_safe(sc, car(cp), stepper, var_list, step_vars, has_set))
+                      return(false);
+                  break;
+
+                case OP_CASE:
+                  if ((!is_pair(cdr(expr))) ||
+                      (!do_is_safe(sc, cadr(expr), stepper, var_list, step_vars, has_set)))
+                    return(false);
+                  for (cp = cddr(expr); is_pair(cp); cp = cdr(cp))
+                    if ((!is_pair(car(cp))) ||      /* (case x #(123)...) */
+                        (!do_is_safe(sc, cdar(cp), stepper, var_list, step_vars, has_set)))
+                      return(false);
+                  break;
+
+                case OP_IF: case OP_WHEN: case OP_UNLESS:
+                case OP_AND: case OP_OR: case OP_BEGIN:
+                case OP_WITH_BAFFLE:
+                  if (!do_is_safe(sc, cdr(expr), stepper, var_list, step_vars, has_set))
+                    return(false);
+                  break;
+
+                case OP_WITH_LET:
+                  return(false); /* 11-Jan-24, this was true!? */
+
+                default:
+                  return(false);
+                }} /* is_syntax(x=car(expr)) */
+          else
+            if (x == sc->quote_function)
+              {
+                if ((!is_pair(cdr(expr))) || (!is_null(cddr(expr))))  /* (#_quote . 1) or (#_quote 1 2) etc */
+                  return(false);
+              }
+            else
+              {
+                /* if a macro, we'll eventually expand it (if *_optimize), but that requires a symbol lookup here and macroexpand */
+                if ((!is_optimized(expr)) ||
+                    (optimize_op(expr) == OP_UNKNOWN_NP) ||
+                    (!do_is_safe(sc, cdr(expr), stepper, var_list, step_vars, has_set)))
+                  return(false);
+
+                /* is this still needed? fx_c_optcq bug -- tests seem ok without it -- 3.5 in tmat */
+                if ((is_symbol(x)) && (is_slot(global_slot(x))) && (is_syntax(global_value(x)))) /* maybe (x == sc->immutable_symbol)? */
+                  return(false); /* syntax hidden behind some other name */
+
+                if ((is_symbol(x)) && (is_setter(x)))             /* "setter" includes stuff like cons and vector -- x is a symbol */
+                  {
+                    /* (hash-table-set! ht i 0) -- caddr is being saved, so this is not safe
+                     *   similarly (vector-set! v 0 i) etc
+                     */
+                    if (is_null(cdr(expr)))
+                      {
+                        if (is_null(cdr(p)))                    /* (vector) for example */
+                          return((x == sc->vector_symbol) || (x == sc->list_symbol) || (x == sc->string_symbol));
+                      }
+                    else
+                      {
+                        if ((has_set) &&
+                            (!direct_memq(cadr(expr), var_list)) &&   /* non-local is being changed */
+                            ((cadr(expr) == stepper) ||               /* stepper is being set? */
+                             (!is_pair(cddr(expr))) ||
+                             (!is_pair(cdddr(expr))) ||
+                             (is_pair(cddddr(expr))) ||
+                             ((x == sc->hash_table_set_symbol) && (caddr(expr) == stepper)) ||
+                             (cadddr(expr) == stepper) ||             /* used to check is_symbol here and above but that's unnecessary */
+                             ((is_pair(cadddr(expr))) && (s7_tree_memq(sc, stepper, cadddr(expr))))))
+                          (*has_set) = true;
+
+                        if (!do_is_safe(sc, cddr(expr), stepper, var_list, step_vars, has_set))
+                          return(false);
+                        if (!safe_stepper_expr(expr, stepper))
+                          return(false);
+                      }}}}}
   return(true);
 }
 
 static bool preserves_type(s7_scheme *sc, uint32_t x)
 {
   return((x == sc->add_class) ||
-	 (x == sc->subtract_class) ||
-	 (x == sc->multiply_class));
+         (x == sc->subtract_class) ||
+         (x == sc->multiply_class));
 }
 
 static s7_pointer simple_stepper(s7_scheme *sc, s7_pointer v)
@@ -81677,13 +81677,13 @@ static s7_pointer simple_stepper(s7_scheme *sc, s7_pointer v)
     {
       s7_pointer step_expr = caddr(v);
       if ((is_optimized(step_expr)) &&
-	  (((optimize_op(step_expr) == HOP_SAFE_C_SC) && (car(v) == cadr(step_expr))) ||
-	   ((is_h_safe_c_nc(step_expr)) &&       /* replace with is_fxable? */
-	    (is_pair(cdr(step_expr))) &&         /* ((v 0 (+))) */
-	    (car(v) == cadr(step_expr)) &&
-	    ((opt1_cfunc(step_expr) == sc->add_x1) || (opt1_cfunc(step_expr) == sc->subtract_x1))) ||
-	   ((optimize_op(step_expr) == HOP_SAFE_C_CS) && (car(v) == caddr(step_expr)))))
-	return(step_expr);
+          (((optimize_op(step_expr) == HOP_SAFE_C_SC) && (car(v) == cadr(step_expr))) ||
+           ((is_h_safe_c_nc(step_expr)) &&       /* replace with is_fxable? */
+            (is_pair(cdr(step_expr))) &&         /* ((v 0 (+))) */
+            (car(v) == cadr(step_expr)) &&
+            ((opt1_cfunc(step_expr) == sc->add_x1) || (opt1_cfunc(step_expr) == sc->subtract_x1))) ||
+           ((optimize_op(step_expr) == HOP_SAFE_C_CS) && (car(v) == caddr(step_expr)))))
+        return(step_expr);
     }
   return(NULL);
 }
@@ -81691,11 +81691,11 @@ static s7_pointer simple_stepper(s7_scheme *sc, s7_pointer v)
 static bool is_simple_end(s7_scheme *sc, s7_pointer end)
 {
   return((is_optimized(end)) &&
-	 (is_safe_c_op(optimize_op(end))) &&
-	 (is_pair(cddr(end))) &&      /* end: (zero? n) */
-	 (cadr(end) != caddr(end)) &&
-	 ((opt1_cfunc(end) == sc->num_eq_xi) ||
-	  (optimize_op(end) == HOP_SAFE_C_SS) || (optimize_op(end) == HOP_SAFE_C_SC)));
+         (is_safe_c_op(optimize_op(end))) &&
+         (is_pair(cddr(end))) &&      /* end: (zero? n) */
+         (cadr(end) != caddr(end)) &&
+         ((opt1_cfunc(end) == sc->num_eq_xi) ||
+          (optimize_op(end) == HOP_SAFE_C_SS) || (optimize_op(end) == HOP_SAFE_C_SC)));
 }
 
 static s7_pointer fxify_step_exprs(s7_scheme *sc, s7_pointer code)
@@ -81708,26 +81708,26 @@ static s7_pointer fxify_step_exprs(s7_scheme *sc, s7_pointer code)
       s7_function callee = NULL;
       s7_pointer expr = cdar(p);    /* init */
       if (is_pair(expr))
-	{
-	  callee = fx_choose(sc, expr, sc->nil, do_symbol_is_safe); /* not vars -- they aren't defined yet */
-	  if (callee) set_fx(expr, callee);
-	}
+        {
+          callee = fx_choose(sc, expr, sc->nil, do_symbol_is_safe); /* not vars -- they aren't defined yet */
+          if (callee) set_fx(expr, callee);
+        }
       expr = cddar(p);   /* step */
       if (is_pair(expr))
-	{
-	  if ((is_pair(car(expr))) &&
-	      (!is_checked(car(expr))))
-	    optimize_expression(sc, car(expr), 0, e, false);
-	  callee = fx_choose(sc, expr, vars, do_symbol_is_safe);  /* fx_proc can be nil! */
-	  if (callee) set_fx(expr, callee);
-	}}
+        {
+          if ((is_pair(car(expr))) &&
+              (!is_checked(car(expr))))
+            optimize_expression(sc, car(expr), 0, e, false);
+          callee = fx_choose(sc, expr, vars, do_symbol_is_safe);  /* fx_proc can be nil! */
+          if (callee) set_fx(expr, callee);
+        }}
   if ((is_pair(cdr(code))) &&
       (is_pair(cadr(code))))
     {
       s7_pointer result = cdadr(code);
       if ((is_pair(result)) &&
-	  (is_fxable(sc, car(result))))
-	set_fx_direct(result, fx_choose(sc, result, vars, do_symbol_is_safe));
+          (is_fxable(sc, car(result))))
+        set_fx_direct(result, fx_choose(sc, result, vars, do_symbol_is_safe));
     }
   return(code);
 }
@@ -81738,8 +81738,8 @@ static bool do_vector_has_definers(s7_pointer v)
   s7_pointer *els = vector_elements(v);
   for (s7_int i = 0; i < len; i++)
     if ((is_pair(els[i])) &&
-	(is_symbol(car(els[i]))) &&
-	(is_definer(car(els[i])))) /* this is a desperate kludge */
+        (is_symbol(car(els[i]))) &&
+        (is_definer(car(els[i])))) /* this is a desperate kludge */
       return(true);
   return(false);
 }
@@ -81755,36 +81755,36 @@ static /* inline */ bool do_tree_has_definers(s7_scheme *sc, s7_pointer tree)
     {
       s7_pointer pp = car(p);
       if (is_symbol(pp))
-	{
-	  if (is_definer(pp))
-	    {
-	      if (pp == sc->varlet_symbol) /* tlet case (varlet e1 ...) */
-		{
-		  if ((is_pair(cdr(p))) && (is_symbol(cadr(p))) && (!symbol_is_in_list(sc, cadr(p))))
-		    return(true);
-		}
-	      else
-		if (pp == sc->apply_symbol)
-		  {
-		    s7_pointer val;
-		    if ((!is_pair(cdr(p))) || (!is_symbol(cadr(p)))) return(true);
-		    val = lookup_unexamined(sc, cadr(p));
-		    if ((!val) || (!is_c_function(val))) return(true);
-		  }
-		else return(true);
-	    }}
+        {
+          if (is_definer(pp))
+            {
+              if (pp == sc->varlet_symbol) /* tlet case (varlet e1 ...) */
+                {
+                  if ((is_pair(cdr(p))) && (is_symbol(cadr(p))) && (!symbol_is_in_list(sc, cadr(p))))
+                    return(true);
+                }
+              else
+                if (pp == sc->apply_symbol)
+                  {
+                    s7_pointer val;
+                    if ((!is_pair(cdr(p))) || (!is_symbol(cadr(p)))) return(true);
+                    val = lookup_unexamined(sc, cadr(p));
+                    if ((!val) || (!is_c_function(val))) return(true);
+                  }
+                else return(true);
+            }}
       else
-	if (is_pair(pp))
-	  {
-	    if (do_tree_has_definers(sc, pp))
-	      return(true);
-	  }
-	else
-	  if ((is_applicable(pp)) &&
-	      (((is_t_vector(pp)) && (do_vector_has_definers(pp))) ||
-	       ((is_c_function(pp)) && (is_func_definer(pp))) ||
-	       ((is_syntax(pp)) && (is_syntax_definer(pp)))))
-	    return(true);
+        if (is_pair(pp))
+          {
+            if (do_tree_has_definers(sc, pp))
+              return(true);
+          }
+        else
+          if ((is_applicable(pp)) &&
+              (((is_t_vector(pp)) && (do_vector_has_definers(pp))) ||
+               ((is_c_function(pp)) && (is_func_definer(pp))) ||
+               ((is_syntax(pp)) && (is_syntax_definer(pp)))))
+            return(true);
     }
   return(false);
 }
@@ -81809,41 +81809,41 @@ static void check_do_for_obvious_errors(s7_scheme *sc, s7_pointer form)
     {
       clear_symbol_list(sc);
       for (x = car(code); is_pair(x); x = cdr(x))
-	{
-	  s7_pointer y = car(x);
-	  if (!(is_pair(y)))                          /* (do (4) (= 3)) */
-	    syntax_error_nr(sc, "do: variable name missing? ~A", 29, form);
-
-	  if (!is_symbol(car(y)))                     /* (do ((3 2)) ()) */
-	    syntax_error_nr(sc, "do step variable: ~S is not a symbol?", 37, y);
-
-	  if (is_constant_symbol(sc, car(y)))         /* (do ((pi 3 (+ pi 1))) ((= pi 4)) pi) */
-	    syntax_error_nr(sc, "do step variable: ~S is immutable", 33, y);
-
-	  if (!is_pair(cdr(y)))
-	    syntax_error_nr(sc, "do: step variable has no initial value: ~A", 42, x);
-	  if (!is_pair(cddr(y)))
-	    {
-	      if (is_not_null(cddr(y)))               /* (do ((i 0 . 1)) ...) */
-		syntax_error_nr(sc, "do: step variable info is an improper list?: ~A", 47, x);
-	    }
-	  else
-	    if (is_not_null(cdddr(y)))                /* (do ((i 0 1 (+ i 1))) ...) */
-	      syntax_error_nr(sc, "do: step variable info has extra stuff after the increment: ~A", 62, x);
-	  set_local(car(y));
-
-	  if (symbol_is_in_list(sc, car(y)))          /* (do ((i 0 (+ i 1)) (i 2))...) */
-	    syntax_error_nr(sc, "duplicate identifier in do: ~A", 30, x);
-	  add_symbol_to_list(sc, car(y));
-	}
+        {
+          s7_pointer y = car(x);
+          if (!(is_pair(y)))                          /* (do (4) (= 3)) */
+            syntax_error_nr(sc, "do: variable name missing? ~A", 29, form);
+
+          if (!is_symbol(car(y)))                     /* (do ((3 2)) ()) */
+            syntax_error_nr(sc, "do step variable: ~S is not a symbol?", 37, y);
+
+          if (is_constant_symbol(sc, car(y)))         /* (do ((pi 3 (+ pi 1))) ((= pi 4)) pi) */
+            syntax_error_nr(sc, "do step variable: ~S is immutable", 33, y);
+
+          if (!is_pair(cdr(y)))
+            syntax_error_nr(sc, "do: step variable has no initial value: ~A", 42, x);
+          if (!is_pair(cddr(y)))
+            {
+              if (is_not_null(cddr(y)))               /* (do ((i 0 . 1)) ...) */
+                syntax_error_nr(sc, "do: step variable info is an improper list?: ~A", 47, x);
+            }
+          else
+            if (is_not_null(cdddr(y)))                /* (do ((i 0 1 (+ i 1))) ...) */
+              syntax_error_nr(sc, "do: step variable info has extra stuff after the increment: ~A", 62, x);
+          set_local(car(y));
+
+          if (symbol_is_in_list(sc, car(y)))          /* (do ((i 0 (+ i 1)) (i 2))...) */
+            syntax_error_nr(sc, "duplicate identifier in do: ~A", 30, x);
+          add_symbol_to_list(sc, car(y));
+        }
       if (is_not_null(x))                             /* (do ((i 0 i) . 1) ((= i 1))) */
-	syntax_error_nr(sc, "do: list of variables is improper: ~A", 37, form);
+        syntax_error_nr(sc, "do: list of variables is improper: ~A", 37, form);
     }
   if (is_pair(cadr(code)))
     {
       for (x = cadr(code); is_pair(x); x = cdr(x));
       if (is_not_null(x))                             /* (do ((i 0 (+ i 1))) ((= i 2) . 3) */
-	syntax_error_nr(sc, "stray dot in do end section? ~A", 31, form);
+        syntax_error_nr(sc, "stray dot in do end section? ~A", 31, form);
     }
   for (x = cddr(code); is_pair(x); x = cdr(x));
   if (is_not_null(x))
@@ -81858,49 +81858,49 @@ static s7_pointer do_end_bad(s7_scheme *sc, s7_pointer form)
       s7_pointer p;
       /* no body, end not fxable (if eval car(end) might be unopt) */
       for (p = car(code); is_pair(p); p = cdr(p))  /* gather var names */
-	{
-	  s7_pointer var = car(p);
-	  if (is_pair(cddr(var)))                  /* if no step expr it's safe in other step exprs 16-Apr-19 */
-	    set_match_symbol(car(var));
-	}
+        {
+          s7_pointer var = car(p);
+          if (is_pair(cddr(var)))                  /* if no step expr it's safe in other step exprs 16-Apr-19 */
+            set_match_symbol(car(var));
+        }
       for (p = car(code); is_pair(p); p = cdr(p))  /* look for stuff like (do ((i 0 j) (j 0 (+ j 1))) ((= j 3) i)) */
-	{
-	  s7_pointer var = car(p);
-	  s7_pointer val = cddr(var);
-	  if (is_pair(val))
-	    {
-	      clear_match_symbol(car(var));        /* ignore current var */
-	      if (tree_match(car(val)))
-		{
-		  for (s7_pointer q = car(code); is_pair(q); q = cdr(q))
-		    clear_match_symbol(caar(q));
-		  return(code);
-		}}
-	  set_match_symbol(car(var));
-	}
+        {
+          s7_pointer var = car(p);
+          s7_pointer val = cddr(var);
+          if (is_pair(val))
+            {
+              clear_match_symbol(car(var));        /* ignore current var */
+              if (tree_match(car(val)))
+                {
+                  for (s7_pointer q = car(code); is_pair(q); q = cdr(q))
+                    clear_match_symbol(caar(q));
+                  return(code);
+                }}
+          set_match_symbol(car(var));
+        }
       for (p = car(code); is_pair(p); p = cdr(p))  /* clear var names */
-	clear_match_symbol(caar(p));
+        clear_match_symbol(caar(p));
 
       if (is_null(p))
-	{
-	  if ((is_null(cadr(code))) && /* (do () ()) or (do (fxable vars) ()) */
-	      (is_null(cddr(code))))
-	    {
-	      if (sc->safety > NO_SAFETY)
-		s7_warn(sc, 256, "%s: infinite do loop: %s\n", __func__, display(form));
-	      return(code);
-	    }
-	  fxify_step_exprs(sc, code);
-	  for (p = car(code); is_pair(p); p = cdr(p))
-	    {
-	      s7_pointer var = car(p);
-	      if ((!has_fx(cdr(var))) ||
-		  ((is_pair(cddr(var))) && (!has_fx(cddr(var)))))
-		return(code);
-	    }
-	  pair_set_syntax_op(form, OP_DO_NO_BODY_NA_VARS);
-	  return(sc->nil);
-	}}
+        {
+          if ((is_null(cadr(code))) && /* (do () ()) or (do (fxable vars) ()) */
+              (is_null(cddr(code))))
+            {
+              if (sc->safety > NO_SAFETY)
+                s7_warn(sc, 256, "%s: infinite do loop: %s\n", __func__, display(form));
+              return(code);
+            }
+          fxify_step_exprs(sc, code);
+          for (p = car(code); is_pair(p); p = cdr(p))
+            {
+              s7_pointer var = car(p);
+              if ((!has_fx(cdr(var))) ||
+                  ((is_pair(cddr(var))) && (!has_fx(cddr(var)))))
+                return(code);
+            }
+          pair_set_syntax_op(form, OP_DO_NO_BODY_NA_VARS);
+          return(sc->nil);
+        }}
   return(fxify_step_exprs(sc, code));
 }
 
@@ -81928,30 +81928,30 @@ static s7_pointer check_do(s7_scheme *sc)
     {
       pair_set_syntax_op(form, OP_DO_NO_VARS);
       if (is_fx_treeable(end))
-	{
-	  if ((is_pair(car(end))) && /* this code is repeated below */
-	      (has_fx(end)) &&
-	      (!(is_syntax(caar(end)))) &&
-	      (!((is_symbol(caar(end))) && (is_definer_or_binder(caar(end))))))
-	    {
-	      s7_pointer v1 = NULL, v2 = NULL, v3 = NULL;
-	      bool more_vs = false;
-	      if (tis_slot(let_slots(sc->curlet))) /* outer vars */
-		{
-		  p = let_slots(sc->curlet);
-		  v1 = slot_symbol(p);
-		  p = next_slot(p);
-		  if (tis_slot(p))
-		    {
-		      v2 = slot_symbol(p);
-		      p = next_slot(p);
-		      if (tis_slot(p))
-			{
-			  v3 = slot_symbol(p);
-			  more_vs = tis_slot(next_slot(p));
-			}}}
-	      if (v1) fx_tree_outer(sc, end, v1, v2, v3, more_vs);
-	    }}
+        {
+          if ((is_pair(car(end))) && /* this code is repeated below */
+              (has_fx(end)) &&
+              (!(is_syntax(caar(end)))) &&
+              (!((is_symbol(caar(end))) && (is_definer_or_binder(caar(end))))))
+            {
+              s7_pointer v1 = NULL, v2 = NULL, v3 = NULL;
+              bool more_vs = false;
+              if (tis_slot(let_slots(sc->curlet))) /* outer vars */
+                {
+                  p = let_slots(sc->curlet);
+                  v1 = slot_symbol(p);
+                  p = next_slot(p);
+                  if (tis_slot(p))
+                    {
+                      v2 = slot_symbol(p);
+                      p = next_slot(p);
+                      if (tis_slot(p))
+                        {
+                          v3 = slot_symbol(p);
+                          more_vs = tis_slot(next_slot(p));
+                        }}}
+              if (v1) fx_tree_outer(sc, end, v1, v2, v3, more_vs);
+            }}
       return(sc->nil);
     }
 
@@ -81969,79 +81969,79 @@ static s7_pointer check_do(s7_scheme *sc)
 
       fx_tree(sc, end, car(v), NULL, NULL, false);
       if (is_fx_treeable(body)) /* this is thwarted by gotos */
-	fx_tree(sc, body, car(v), NULL, NULL, false);
+        fx_tree(sc, body, car(v), NULL, NULL, false);
 
       step_expr = simple_stepper(sc, v);
       if (step_expr)
-	{
-	  s7_pointer orig_end = end;
-	  set_fx(cdr(v), fx_choose(sc, cdr(v), vars, do_symbol_is_safe)); /* v is (i 0 (+ i 1)) or the like */
-
-	  /* step var is (var const|symbol (op var const)|(op const var)) */
-	  end = car(end);
-	  if ((is_simple_end(sc, end)) &&
-	      (car(v) == cadr(end)))
-	    {
-	      /* end var is (op var const|symbol) using same var as step so at least we can use SIMPLE_DO */
-	      bool has_set = false;
-	      bool one_line = ((is_null(cdr(body))) && (is_pair(car(body))));
-	      if ((car(end) == sc->num_eq_symbol) && (is_symbol(cadr(end))) && (is_t_integer(caddr(end))))
-		{
-		  set_c_function(end, sc->num_eq_2);
-		  set_opt2_con(cdr(end), caddr(end));
-		  set_fx_direct(orig_end, (integer(caddr(end)) == 0) ? fx_num_eq_s0 : fx_num_eq_si);
-		}
-	      set_opt1_any(code, caddr(end)); /* symbol or int(?) */
-	      set_opt2_pair(code, step_expr); /* caddr(caar(code)) */
-	      pair_set_syntax_op(form, OP_SIMPLE_DO);              /* simple_do: 1 var easy step/end */
-
-	      if ((c_function_class(opt1_cfunc(step_expr)) == sc->add_class) &&  /* we check above that (car(v) == cadr(step_expr)) and (car(v) == cadr(end)) */
-		  ((c_function_class(opt1_cfunc(end)) == sc->num_eq_class) ||
-		   (opt1_cfunc(end) == sc->geq_2)))
-		{
-		  if ((one_line) &&
-		      ((!is_optimized(car(body))) || (op_no_hop(car(body)) != OP_SAFE_C_NC)) && /* this does happen: (if (= i 3) (vector-set! j 0 i)) */
-		      (is_symbol_and_syntactic(caar(body))) &&
-		      (s7_is_integer(caddr(step_expr))) && /* this currently blocks s7_optimize of float steppers */
-		      (s7_integer_clamped_if_gmp(sc, caddr(step_expr)) == 1))
-		    {
-		      pair_set_syntax_op(car(body), symbol_syntax_op_checked(car(body)));
-		      pair_set_syntax_op(form, OP_DOTIMES_P);          /* dotimes_p: simple + syntax body + 1 expr */
-		    }
-
-		  if (((caddr(step_expr) == int_one) || (cadr(step_expr) == int_one)) &&
-		      (do_is_safe(sc, body, car(v), sc->nil, vars, &has_set)))
-		    {
-		      pair_set_syntax_op(form, OP_SAFE_DO);             /* safe_do: body is safe, step by 1 */
-		      /* no semipermanent let here because apparently do_is_safe accepts recursive calls? */
-		      if ((!has_set) &&
-			  (c_function_class(opt1_cfunc(end)) == sc->num_eq_class))
-			{
-			  pair_set_syntax_op(form, OP_SAFE_DOTIMES);   /* safe_dotimes: end is = */
-			  if (is_fxable(sc, car(body)))
-			    fx_annotate_arg(sc, body, collect_variables(sc, vars, sc->nil));
-			}
-		      fx_tree(sc, body, car(v), NULL, NULL, false);
-		      if (stack_top_op(sc) == OP_SAFE_DO_STEP)
-			fx_tree_outer(sc, body, caaar(stack_top_code(sc)), NULL, NULL, true);
-		    }}
-	      return(sc->nil);
-	    }}}
+        {
+          s7_pointer orig_end = end;
+          set_fx(cdr(v), fx_choose(sc, cdr(v), vars, do_symbol_is_safe)); /* v is (i 0 (+ i 1)) or the like */
+
+          /* step var is (var const|symbol (op var const)|(op const var)) */
+          end = car(end);
+          if ((is_simple_end(sc, end)) &&
+              (car(v) == cadr(end)))
+            {
+              /* end var is (op var const|symbol) using same var as step so at least we can use SIMPLE_DO */
+              bool has_set = false;
+              bool one_line = ((is_null(cdr(body))) && (is_pair(car(body))));
+              if ((car(end) == sc->num_eq_symbol) && (is_symbol(cadr(end))) && (is_t_integer(caddr(end))))
+                {
+                  set_c_function(end, sc->num_eq_2);
+                  set_opt2_con(cdr(end), caddr(end));
+                  set_fx_direct(orig_end, (integer(caddr(end)) == 0) ? fx_num_eq_s0 : fx_num_eq_si);
+                }
+              set_opt1_any(code, caddr(end)); /* symbol or int(?) */
+              set_opt2_pair(code, step_expr); /* caddr(caar(code)) */
+              pair_set_syntax_op(form, OP_SIMPLE_DO);              /* simple_do: 1 var easy step/end */
+
+              if ((c_function_class(opt1_cfunc(step_expr)) == sc->add_class) &&  /* we check above that (car(v) == cadr(step_expr)) and (car(v) == cadr(end)) */
+                  ((c_function_class(opt1_cfunc(end)) == sc->num_eq_class) ||
+                   (opt1_cfunc(end) == sc->geq_2)))
+                {
+                  if ((one_line) &&
+                      ((!is_optimized(car(body))) || (op_no_hop(car(body)) != OP_SAFE_C_NC)) && /* this does happen: (if (= i 3) (vector-set! j 0 i)) */
+                      (is_symbol_and_syntactic(caar(body))) &&
+                      (s7_is_integer(caddr(step_expr))) && /* this currently blocks s7_optimize of float steppers */
+                      (s7_integer_clamped_if_gmp(sc, caddr(step_expr)) == 1))
+                    {
+                      pair_set_syntax_op(car(body), symbol_syntax_op_checked(car(body)));
+                      pair_set_syntax_op(form, OP_DOTIMES_P);          /* dotimes_p: simple + syntax body + 1 expr */
+                    }
+
+                  if (((caddr(step_expr) == int_one) || (cadr(step_expr) == int_one)) &&
+                      (do_is_safe(sc, body, car(v), sc->nil, vars, &has_set)))
+                    {
+                      pair_set_syntax_op(form, OP_SAFE_DO);             /* safe_do: body is safe, step by 1 */
+                      /* no semipermanent let here because apparently do_is_safe accepts recursive calls? */
+                      if ((!has_set) &&
+                          (c_function_class(opt1_cfunc(end)) == sc->num_eq_class))
+                        {
+                          pair_set_syntax_op(form, OP_SAFE_DOTIMES);   /* safe_dotimes: end is = */
+                          if (is_fxable(sc, car(body)))
+                            fx_annotate_arg(sc, body, collect_variables(sc, vars, sc->nil));
+                        }
+                      fx_tree(sc, body, car(v), NULL, NULL, false);
+                      if (stack_top_op(sc) == OP_SAFE_DO_STEP)
+                        fx_tree_outer(sc, body, caaar(stack_top_code(sc)), NULL, NULL, true);
+                    }}
+              return(sc->nil);
+            }}}
 
   /* we get here if there is more than one local var or anything "non-simple" about the rest */
   for (p = vars; is_pair(p); p = cdr(p))
     {
       s7_pointer var = car(p);
       if ((!is_fxable(sc, cadr(var))) ||
-	  ((is_pair(cddr(var))) && (!is_fxable(sc, caddr(var)))) ||
-	  ((is_symbol(cadr(var))) && (is_definer_or_binder(cadr(var)))))
-	{
-	  for (s7_pointer q = vars; q != p; q = cdr(q))
-	    clear_match_symbol(caar(q));
-	  return(fxify_step_exprs(sc, code));
-	}
+          ((is_pair(cddr(var))) && (!is_fxable(sc, caddr(var)))) ||
+          ((is_symbol(cadr(var))) && (is_definer_or_binder(cadr(var)))))
+        {
+          for (s7_pointer q = vars; q != p; q = cdr(q))
+            clear_match_symbol(caar(q));
+          return(fxify_step_exprs(sc, code));
+        }
       if (is_pair(cddr(var))) /* if no step expr it's safe in other step exprs 16-Apr-19 */
-	set_match_symbol(car(var));
+        set_match_symbol(car(var));
     }
 
   {
@@ -82050,170 +82050,170 @@ static s7_pointer check_do(s7_scheme *sc)
 
     for (p = vars; is_pair(p); p = cdr(p))
       {
-	s7_pointer var = car(p);
-	s7_pointer val = cddr(var);
-	stepper3 = stepper2;
-	stepper2 = stepper1;
-	stepper1 = stepper0;
-	stepper0 = car(var);
-	if (is_pair(val))
-	  {
-	    var = car(var);
-	    clear_match_symbol(var); /* ignore current var */
-	    if (tree_match(car(val)))
-	      {
-		for (s7_pointer q = vars; is_pair(q); q = cdr(q))
-		  clear_match_symbol(caar(q));
-		if (is_null(body))
-		  got_pending = true;
-		else return(fxify_step_exprs(sc, code));
-	      }
-	    set_match_symbol(var);
-	  }}
+        s7_pointer var = car(p);
+        s7_pointer val = cddr(var);
+        stepper3 = stepper2;
+        stepper2 = stepper1;
+        stepper1 = stepper0;
+        stepper0 = car(var);
+        if (is_pair(val))
+          {
+            var = car(var);
+            clear_match_symbol(var); /* ignore current var */
+            if (tree_match(car(val)))
+              {
+                for (s7_pointer q = vars; is_pair(q); q = cdr(q))
+                  clear_match_symbol(caar(q));
+                if (is_null(body))
+                  got_pending = true;
+                else return(fxify_step_exprs(sc, code));
+              }
+            set_match_symbol(var);
+          }}
 
     for (p = vars; is_pair(p); p = cdr(p))
       set_match_symbol(caar(p));
     for (p = let_slots(sc->curlet); tis_slot(p); p = next_slot(p))
       if (is_matched_symbol(slot_symbol(p)))
-	{
-	  outer_shadowed = true;
-	  break;
-	}
+        {
+          outer_shadowed = true;
+          break;
+        }
     for (p = vars; is_pair(p); p = cdr(p))
       clear_match_symbol(caar(p));
 
     /* end and steps look ok! */
     for (p = vars; is_pair(p); p = cdr(p))
       {
-	s7_pointer var = car(p);
-	set_fx_direct(cdr(var), fx_choose(sc, cdr(var), sc->curlet, let_symbol_is_safe)); /* init val */
-	if (is_pair(cddr(var)))
-	  {
-	    s7_pointer step_expr = caddr(var);
-	    set_fx_direct(cddr(var), fx_choose(sc, cddr(var), vars, do_symbol_is_safe)); /* sets opt2(cddr(var)), not opt1 */
-	    if (!is_pair(step_expr))                /* (i 0 0) */
-	      {
-		if (cadr(var) == caddr(var))        /* not types match: (i x y) etc */
-		  set_safe_stepper_expr(cddr(var));
-	      }
-	    else
-	      {
-		s7_pointer endp = car(end);
-		s7_pointer var1 = car(var);
-		if ((!is_quote(car(step_expr))) &&     /* opt1_cfunc(==opt1) might not be set in this case (sigh) */
-		    (is_safe_c_op(optimize_op(step_expr))) &&
-		    ((preserves_type(sc, c_function_class(opt1_cfunc(step_expr)))) || /* add etc */
-		     (car(step_expr) == sc->cdr_symbol) ||
-		     (car(step_expr) == sc->cddr_symbol) ||
-		     ((is_pair(cadr(var))) &&
-		      (is_pair(c_function_signature(c_function_base(opt1_cfunc(step_expr))))) &&
-		      (car(c_function_signature(c_function_base(opt1_cfunc(step_expr)))) != sc->T) &&
-		      (caadr(var) == car(step_expr)))))	       /* i.e. accept char-position as init/step, but not iterate */
-		  set_safe_stepper_expr(cddr(var));
-
-		if ((is_proper_list_3(sc, endp)) && (is_proper_list_3(sc, step_expr)) &&
-		    ((car(endp) == sc->num_eq_symbol) || (car(endp) == sc->geq_symbol)) &&
-		    (is_symbol(cadr(endp))) &&
-		    ((is_t_integer(caddr(endp))) || (is_symbol(caddr(endp)))) &&
-		    (car(step_expr) == sc->add_symbol) &&
-		    (var1 == cadr(endp)) && (var1 == cadr(step_expr)) &&
-		    ((car(endp) != sc->num_eq_symbol) || ((caddr(step_expr) == int_one))))
-		  set_loop_end_possible(end);
-	      }}}
+        s7_pointer var = car(p);
+        set_fx_direct(cdr(var), fx_choose(sc, cdr(var), sc->curlet, let_symbol_is_safe)); /* init val */
+        if (is_pair(cddr(var)))
+          {
+            s7_pointer step_expr = caddr(var);
+            set_fx_direct(cddr(var), fx_choose(sc, cddr(var), vars, do_symbol_is_safe)); /* sets opt2(cddr(var)), not opt1 */
+            if (!is_pair(step_expr))                /* (i 0 0) */
+              {
+                if (cadr(var) == caddr(var))        /* not types match: (i x y) etc */
+                  set_safe_stepper_expr(cddr(var));
+              }
+            else
+              {
+                s7_pointer endp = car(end);
+                s7_pointer var1 = car(var);
+                if ((!is_quote(car(step_expr))) &&     /* opt1_cfunc(==opt1) might not be set in this case (sigh) */
+                    (is_safe_c_op(optimize_op(step_expr))) &&
+                    ((preserves_type(sc, c_function_class(opt1_cfunc(step_expr)))) || /* add etc */
+                     (car(step_expr) == sc->cdr_symbol) ||
+                     (car(step_expr) == sc->cddr_symbol) ||
+                     ((is_pair(cadr(var))) &&
+                      (is_pair(c_function_signature(c_function_base(opt1_cfunc(step_expr))))) &&
+                      (car(c_function_signature(c_function_base(opt1_cfunc(step_expr)))) != sc->T) &&
+                      (caadr(var) == car(step_expr)))))               /* i.e. accept char-position as init/step, but not iterate */
+                  set_safe_stepper_expr(cddr(var));
+
+                if ((is_proper_list_3(sc, endp)) && (is_proper_list_3(sc, step_expr)) &&
+                    ((car(endp) == sc->num_eq_symbol) || (car(endp) == sc->geq_symbol)) &&
+                    (is_symbol(cadr(endp))) &&
+                    ((is_t_integer(caddr(endp))) || (is_symbol(caddr(endp)))) &&
+                    (car(step_expr) == sc->add_symbol) &&
+                    (var1 == cadr(endp)) && (var1 == cadr(step_expr)) &&
+                    ((car(endp) != sc->num_eq_symbol) || ((caddr(step_expr) == int_one))))
+                  set_loop_end_possible(end);
+              }}}
     pair_set_syntax_op(form, (got_pending) ? OP_DOX_PENDING_NO_BODY : OP_DOX);
     /* there are only a couple of cases in snd-test where a multi-statement do body is completely fx-able */
 
     if ((is_null(body)) &&
-	(is_null(cdr(vars))) &&
-	(is_pair(cdr(end))) &&
-	(is_null(cddr(end))) &&
-	(has_fx(cdr(end))) &&
-	(is_pair(cdar(vars))) &&
-	(is_pair(cddar(vars))))
+        (is_null(cdr(vars))) &&
+        (is_pair(cdr(end))) &&
+        (is_null(cddr(end))) &&
+        (has_fx(cdr(end))) &&
+        (is_pair(cdar(vars))) &&
+        (is_pair(cddar(vars))))
       {
-	s7_pointer var = caar(vars);
-	s7_pointer step = cddar(vars);
-	set_opt3_any(code, (in_heap(code)) ? sc->F : make_semipermanent_let(sc, vars));
-	if (!got_pending)
-	  pair_set_syntax_op(form, OP_DOX_NO_BODY);
-	if (is_safe_stepper_expr(step))
-	  {
-	    step = car(step);
-	    if ((is_pair(step)) && (is_proper_list_3(sc, step)))
-	      {
-		if ((car(step) == sc->add_symbol) &&
-		    (((cadr(step) == var) && (caddr(step) == int_one)) ||
-		     (caddr(step) == var)) && (cadr(step) == int_one))
-		  set_opt2_con(code, int_one);
-		else
-		  if ((car(step) == sc->subtract_symbol) &&
-		      (cadr(step) == var) &&
-		      (caddr(step) == int_one))
-		    set_opt2_con(code, minus_one);
-		  else set_opt2_con(code, int_zero);
-	      }
-	    else set_opt2_con(code, int_zero);
-	  }
-	else set_opt2_con(code, int_zero);
+        s7_pointer var = caar(vars);
+        s7_pointer step = cddar(vars);
+        set_opt3_any(code, (in_heap(code)) ? sc->F : make_semipermanent_let(sc, vars));
+        if (!got_pending)
+          pair_set_syntax_op(form, OP_DOX_NO_BODY);
+        if (is_safe_stepper_expr(step))
+          {
+            step = car(step);
+            if ((is_pair(step)) && (is_proper_list_3(sc, step)))
+              {
+                if ((car(step) == sc->add_symbol) &&
+                    (((cadr(step) == var) && (caddr(step) == int_one)) ||
+                     (caddr(step) == var)) && (cadr(step) == int_one))
+                  set_opt2_con(code, int_one);
+                else
+                  if ((car(step) == sc->subtract_symbol) &&
+                      (cadr(step) == var) &&
+                      (caddr(step) == int_one))
+                    set_opt2_con(code, minus_one);
+                  else set_opt2_con(code, int_zero);
+              }
+            else set_opt2_con(code, int_zero);
+          }
+        else set_opt2_con(code, int_zero);
       }
 
     if (do_passes_safety_check(sc, body, sc->nil, vars, NULL))
       {
-	s7_pointer var1 = NULL, var2 = NULL, var3 = NULL;
-	bool more_vars = false;
-	if (tis_slot(let_slots(sc->curlet))) /* outer vars */
-	  {
-	    p = let_slots(sc->curlet);
-	    var1 = slot_symbol(p);
-	    p = next_slot(p);
-	    if (tis_slot(p))
-	      {
-		var2 = slot_symbol(p);
-		p = next_slot(p);
-		if (tis_slot(p))
-		  {
-		    var3 = slot_symbol(p);
-		    more_vars = tis_slot(next_slot(p));
-		  }}}
-
-	for (p = vars; is_pair(p); p = cdr(p))
-	  {
-	    s7_pointer var = car(p);
-	    if (is_pair(cdr(var)))
-	      {
-		if (var1) fx_tree_in(sc, cdr(var), var1, var2, var3, more_vars); /* init vals, more_vars refers to outer let, stepper3 == local let more_vars */
-		if (is_pair(cddr(var)))
-		  {
-		    if (stepper0) fx_tree(sc, cddr(var), stepper0, stepper1, stepper2, stepper3);
-		    if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, cddr(var), var1, var2, var3, more_vars);
-		  }}}
-
-	if ((is_pair(cdr(end))) &&
-	    (is_null(cddr(end))) &&
-	    (has_fx(cdr(end))))
-	  {
-	    if (!fx_tree_in(sc, cdr(end), stepper0, stepper1, stepper2, stepper3))
-	      fx_tree(sc, cadr(end), stepper0, stepper1, stepper2, stepper3);
-	    if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, cdr(end), var1, var2, var3, more_vars);
-	  }
-
-	if ((is_pair(car(end))) &&
-	    (has_fx(end)) &&
-	    (!(is_syntax(caar(end)))) &&
-	    (!((is_symbol(caar(end))) && (is_definer_or_binder(caar(end))))))
-	  {
-	    if (!fx_tree_in(sc, end, stepper0, stepper1, stepper2, stepper3)) /* just the end-test, not the results */
-	      fx_tree(sc, car(end), stepper0, stepper1, stepper2, stepper3);    /* car(end) might be (or ...) */
-	    if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, end, var1, var2, var3, more_vars);
-	  }
-
-	if ((is_pair(body)) && (is_null(cdr(body))) &&
-	    (is_fxable(sc, car(body))))
-	  {
-	    fx_annotate_arg(sc, body, collect_variables(sc, vars, sc->nil));
-	    if (stepper0) fx_tree(sc, body, stepper0, stepper1, stepper2, stepper3);
-	    if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, body, var1, var2, var3, more_vars);
-	  }}}
+        s7_pointer var1 = NULL, var2 = NULL, var3 = NULL;
+        bool more_vars = false;
+        if (tis_slot(let_slots(sc->curlet))) /* outer vars */
+          {
+            p = let_slots(sc->curlet);
+            var1 = slot_symbol(p);
+            p = next_slot(p);
+            if (tis_slot(p))
+              {
+                var2 = slot_symbol(p);
+                p = next_slot(p);
+                if (tis_slot(p))
+                  {
+                    var3 = slot_symbol(p);
+                    more_vars = tis_slot(next_slot(p));
+                  }}}
+
+        for (p = vars; is_pair(p); p = cdr(p))
+          {
+            s7_pointer var = car(p);
+            if (is_pair(cdr(var)))
+              {
+                if (var1) fx_tree_in(sc, cdr(var), var1, var2, var3, more_vars); /* init vals, more_vars refers to outer let, stepper3 == local let more_vars */
+                if (is_pair(cddr(var)))
+                  {
+                    if (stepper0) fx_tree(sc, cddr(var), stepper0, stepper1, stepper2, stepper3);
+                    if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, cddr(var), var1, var2, var3, more_vars);
+                  }}}
+
+        if ((is_pair(cdr(end))) &&
+            (is_null(cddr(end))) &&
+            (has_fx(cdr(end))))
+          {
+            if (!fx_tree_in(sc, cdr(end), stepper0, stepper1, stepper2, stepper3))
+              fx_tree(sc, cadr(end), stepper0, stepper1, stepper2, stepper3);
+            if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, cdr(end), var1, var2, var3, more_vars);
+          }
+
+        if ((is_pair(car(end))) &&
+            (has_fx(end)) &&
+            (!(is_syntax(caar(end)))) &&
+            (!((is_symbol(caar(end))) && (is_definer_or_binder(caar(end))))))
+          {
+            if (!fx_tree_in(sc, end, stepper0, stepper1, stepper2, stepper3)) /* just the end-test, not the results */
+              fx_tree(sc, car(end), stepper0, stepper1, stepper2, stepper3);    /* car(end) might be (or ...) */
+            if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, end, var1, var2, var3, more_vars);
+          }
+
+        if ((is_pair(body)) && (is_null(cdr(body))) &&
+            (is_fxable(sc, car(body))))
+          {
+            fx_annotate_arg(sc, body, collect_variables(sc, vars, sc->nil));
+            if (stepper0) fx_tree(sc, body, stepper0, stepper1, stepper2, stepper3);
+            if ((var1) && (!outer_shadowed) && (!stepper3)) fx_tree_outer(sc, body, var1, var2, var3, more_vars);
+          }}}
   return(sc->nil);
 }
 
@@ -82223,64 +82223,64 @@ static bool has_safe_steppers(s7_scheme *sc, s7_pointer let)
     {
       s7_pointer val = slot_value(slot);
       if (slot_has_expression(slot))
-	{
-	  s7_pointer step_expr = T_Pair(slot_expression(slot));
-	  if (is_safe_stepper_expr(step_expr))
-	    {
-	      if (is_t_integer(val))
-		{
-		  if (is_int_optable(step_expr))
-		    set_safe_stepper(slot);
-		  else
-		    if (no_int_opt(step_expr))
-		      clear_safe_stepper(slot);
-		    else
-		      {
-			sc->pc = 0;
-			if (int_optimize(sc, step_expr))
-			  {
-			    set_safe_stepper(slot);
-			    set_is_int_optable(step_expr);
-			  }
-			else
-			  {
-			    clear_safe_stepper(slot);
-			    set_no_int_opt(step_expr);
-			  }}}
-	      else
-		if (is_small_real(val))
-		  {
-		    if (is_float_optable(step_expr))
-		      set_safe_stepper(slot);
-		    else
-		      if (no_float_opt(step_expr))
-			clear_safe_stepper(slot);
-		      else
-			{
-			  sc->pc = 0;
-			  if (float_optimize(sc, step_expr))
-			    {
-			      set_safe_stepper(slot);
-			      set_is_float_optable(step_expr);
-			    }
-			  else
-			    {
-			      clear_safe_stepper(slot);
-			      set_no_float_opt(step_expr);
-			    }}}
-		else set_safe_stepper(slot);  /* ?? shouldn't this check types ?? */
-	    }}
+        {
+          s7_pointer step_expr = T_Pair(slot_expression(slot));
+          if (is_safe_stepper_expr(step_expr))
+            {
+              if (is_t_integer(val))
+                {
+                  if (is_int_optable(step_expr))
+                    set_safe_stepper(slot);
+                  else
+                    if (no_int_opt(step_expr))
+                      clear_safe_stepper(slot);
+                    else
+                      {
+                        sc->pc = 0;
+                        if (int_optimize(sc, step_expr))
+                          {
+                            set_safe_stepper(slot);
+                            set_is_int_optable(step_expr);
+                          }
+                        else
+                          {
+                            clear_safe_stepper(slot);
+                            set_no_int_opt(step_expr);
+                          }}}
+              else
+                if (is_small_real(val))
+                  {
+                    if (is_float_optable(step_expr))
+                      set_safe_stepper(slot);
+                    else
+                      if (no_float_opt(step_expr))
+                        clear_safe_stepper(slot);
+                      else
+                        {
+                          sc->pc = 0;
+                          if (float_optimize(sc, step_expr))
+                            {
+                              set_safe_stepper(slot);
+                              set_is_float_optable(step_expr);
+                            }
+                          else
+                            {
+                              clear_safe_stepper(slot);
+                              set_no_float_opt(step_expr);
+                            }}}
+                else set_safe_stepper(slot);  /* ?? shouldn't this check types ?? */
+            }}
       else
-	{
-	  if (is_t_real(val))
-	    slot_set_value(slot, make_mutable_real(sc, real(val)));
-	  else
-	    if (is_t_integer(val))
-	      slot_set_value(slot, make_mutable_integer(sc, integer(val)));
-	  set_safe_stepper(slot);
-	}
+        {
+          if (is_t_real(val))
+            slot_set_value(slot, make_mutable_real(sc, real(val)));
+          else
+            if (is_t_integer(val))
+              slot_set_value(slot, make_mutable_integer(sc, integer(val)));
+          set_safe_stepper(slot);
+        }
       if (!is_safe_stepper(slot))
-	return(false);
+        return(false);
     }
   return(true);
 }
@@ -82291,10 +82291,10 @@ static bool copy_if_end_ok(s7_scheme *sc, s7_pointer dest, s7_pointer source, s7
     {
       s7_pointer end_slot = s7_slot(sc, (cadr(endp) == slot_symbol(stepper)) ? caddr(endp) : cadr(endp));
       if ((is_slot(end_slot)) && (is_t_integer(slot_value(end_slot))))
-	{
-	  copy_to_same_type(sc, dest, source, i, integer(slot_value(end_slot)), i);
-	  return(true);
-	}}
+        {
+          copy_to_same_type(sc, dest, source, i, integer(slot_value(end_slot)), i);
+          return(true);
+        }}
   return(false);
 }
 
@@ -82308,7 +82308,7 @@ static bool op_dox_init(s7_scheme *sc)
     {
       add_slot(sc, let, caar(vars), fx_call(sc, cdar(vars)));
       if (is_pair(cddar(vars)))
-	slot_set_expression(let_slots(let), cddar(vars));
+        slot_set_expression(let_slots(let), cddar(vars));
       else slot_just_set_expression(let_slots(let), sc->nil);
     }
   set_curlet(sc, let);
@@ -82338,40 +82338,40 @@ static goto_t op_dox_no_body_1(s7_scheme *sc, s7_pointer slots, s7_pointer end,
       s7_function f = fx_proc(slot_expression(stepper)); /* e.g. fx_add_s1 */
       s7_pointer a = car(slot_expression(stepper));
       if ((f == fx_c_nc) || (f == fx_c_0c))
-	{
-	  f = fn_proc(a);
-	  a = cdr(a);
-	}
+        {
+          f = fn_proc(a);
+          a = cdr(a);
+        }
       if (((f == fx_cdr_s) || (f == fx_cdr_t)) &&
-	  (cadr(a) == slot_symbol(stepper)))
-	{
-	  do {slot_set_value(stepper, cdr(slot_value(stepper)));} while (endf(sc, endp) == sc->F);
-	  sc->value = sc->T;
-	}
+          (cadr(a) == slot_symbol(stepper)))
+        {
+          do {slot_set_value(stepper, cdr(slot_value(stepper)));} while (endf(sc, endp) == sc->F);
+          sc->value = sc->T;
+        }
       else /* (- n 1) tpeak dup */
-	if (((f == fx_add_t1) || (f == fx_add_u1)) && (is_t_integer(slot_value(stepper))))
-	  {
-	    s7_pointer p = make_mutable_integer(sc, integer(slot_value(stepper)));
-	    slot_set_value(stepper, p);
-	    if (!no_bool_opt(end))
-	      {
-		sc->pc = 0;
-		if (bool_optimize(sc, end))  /* in dup.scm this costs more than the fb(o) below saves (search is short) */
-		  {                          /*    but tc is much slower (and bool|int_optimize dominates) */
-		    opt_info *o = sc->opts[0];
-		    bool (*fb)(opt_info *o) = o->v[0].fb;
-		    do {integer(p)++;} while (!fb(o)); /* do {integer(p)++;} while ((sc->value = optf(sc, endp)) == sc->F); */
-		    clear_mutable_integer(p);
-		    sc->value = sc->T;
-		    sc->code = cdr(end);
-		    return(goto_do_end_clauses);
-		  }
-		set_no_bool_opt(end);
-	      }
-	    do {integer(p)++;} while ((sc->value = endf(sc, endp)) == sc->F);
-	    clear_mutable_integer(p);
-	  }
-	else do {slot_set_value(stepper, f(sc, a));} while ((sc->value = endf(sc, endp)) == sc->F);
+        if (((f == fx_add_t1) || (f == fx_add_u1)) && (is_t_integer(slot_value(stepper))))
+          {
+            s7_pointer p = make_mutable_integer(sc, integer(slot_value(stepper)));
+            slot_set_value(stepper, p);
+            if (!no_bool_opt(end))
+              {
+                sc->pc = 0;
+                if (bool_optimize(sc, end))  /* in dup.scm this costs more than the fb(o) below saves (search is short) */
+                  {                          /*    but tc is much slower (and bool|int_optimize dominates) */
+                    opt_info *o = sc->opts[0];
+                    bool (*fb)(opt_info *o) = o->v[0].fb;
+                    do {integer(p)++;} while (!fb(o)); /* do {integer(p)++;} while ((sc->value = optf(sc, endp)) == sc->F); */
+                    clear_mutable_integer(p);
+                    sc->value = sc->T;
+                    sc->code = cdr(end);
+                    return(goto_do_end_clauses);
+                  }
+                set_no_bool_opt(end);
+              }
+            do {integer(p)++;} while ((sc->value = endf(sc, endp)) == sc->F);
+            clear_mutable_integer(p);
+          }
+        else do {slot_set_value(stepper, f(sc, a));} while ((sc->value = endf(sc, endp)) == sc->F);
 
       sc->code = cdr(end);
       return(goto_do_end_clauses);
@@ -82384,35 +82384,35 @@ static goto_t op_dox_no_body_1(s7_scheme *sc, s7_pointer slots, s7_pointer end,
       s7_pointer step2 = next_slot(step1);
       s7_pointer expr2 = slot_expression(step2); /* presetting fx_proc/car(expr) is not faster */
       if ((fx_proc(expr2) == fx_subtract_u1) &&
-	  (is_t_integer(slot_value(step2))) &&
-	  (endf == fx_num_eq_ui))
-	{
-	  s7_int lim = integer(caddr(endp));
-	  for (s7_int i = integer(slot_value(step2)) - 1; i >= lim; i--)
-	    slot_set_value(step1, fx_call(sc, expr1));
-	}
+          (is_t_integer(slot_value(step2))) &&
+          (endf == fx_num_eq_ui))
+        {
+          s7_int lim = integer(caddr(endp));
+          for (s7_int i = integer(slot_value(step2)) - 1; i >= lim; i--)
+            slot_set_value(step1, fx_call(sc, expr1));
+        }
       else
-	do {
-	  slot_set_value(step1, fx_call(sc, expr1));
-	  slot_set_value(step2, fx_call(sc, expr2));
-	} while ((sc->value = endf(sc, endp)) == sc->F);
+        do {
+          slot_set_value(step1, fx_call(sc, expr1));
+          slot_set_value(step2, fx_call(sc, expr2));
+        } while ((sc->value = endf(sc, endp)) == sc->F);
       sc->code = cdr(end);
       if (!is_pair(sc->code)) return(goto_start);                  /* no result: (define (f) (do ((x 0 (+ x 1)) (i 0 (+ i 1))) ((= i 1)))) (f) (f) */
       if ((!is_symbol(car(sc->code))) || (is_pair(cdr(sc->code)))) /* more than one result: (define (f) (do ((x 0 (+ x 1)) (i 0 (+ i 1))) ((= i 1) x 3 4))) (f) */
-	return(goto_do_end_clauses);
+        return(goto_do_end_clauses);
       step1 = s7_slot(sc, car(sc->code));
       if (step1 == sc->undefined)                                  /* (let () (define (f) (do ((x 0 (+ x 1)) (i 0 (+ i 1))) ((= i 1) y))) (f)) */
-	unbound_variable_error_nr(sc, car(sc->code));
+        unbound_variable_error_nr(sc, car(sc->code));
       sc->value = slot_value(step1);
       if (is_t_real(sc->value))
-	clear_mutable_number(sc->value);
+        clear_mutable_number(sc->value);
       return(goto_start);
     }
   do {
     s7_pointer slt = slots;
     do {
       if (slot_has_expression(slt))
-	slot_set_value(slt, fx_call(sc, slot_expression(slt)));
+        slot_set_value(slt, fx_call(sc, slot_expression(slt)));
       slt = next_slot(slt);
     } while (tis_slot(slt));
   } while ((sc->value = endf(sc, endp)) == sc->F);
@@ -82445,11 +82445,11 @@ static goto_t op_dox(s7_scheme *sc)
       new_cell_no_check(sc, slot, T_SLOT);
       slot_set_symbol_and_value(slot, caar(vars), val);
       if (is_pair(stp))
-	{
-	  steppers++;
-	  stepper = slot;
-	  slot_set_expression(slot, stp);
-	}
+        {
+          steppers++;
+          stepper = slot;
+          slot_set_expression(slot, stp);
+        }
       else slot_just_set_expression(slot, sc->nil);
       slot_set_next(slot, let_slots(let));
       let_set_slots(let, slot);
@@ -82474,10 +82474,10 @@ static goto_t op_dox(s7_scheme *sc)
     {
       s7_pointer stop_slot = (is_symbol(caddr(endp))) ? opt_integer_symbol(sc, caddr(endp)) : sc->nil;
       if (stop_slot) /* sc->nil -> it's an integer */
-	{
-	  set_has_loop_end(stepper);
-	  set_loop_end(stepper, (is_slot(stop_slot)) ? integer(slot_value(stop_slot)) : integer(caddr(endp)));
-	}}
+        {
+          set_has_loop_end(stepper);
+          set_loop_end(stepper, (is_slot(stop_slot)) ? integer(slot_value(stop_slot)) : integer(caddr(endp)));
+        }}
 
   if (is_true(sc, sc->value = endf(sc, endp)))
     {
@@ -82495,181 +82495,181 @@ static goto_t op_dox(s7_scheme *sc)
       s7_pfunc bodyf = NULL;
       if ((!no_cell_opt(code)) &&
 #if WITH_GMP
-	  (!got_bignum) &&
+          (!got_bignum) &&
 #endif
-	  (has_safe_steppers(sc, sc->curlet)))
-	bodyf = s7_optimize_nv(sc, code);
+          (has_safe_steppers(sc, sc->curlet)))
+        bodyf = s7_optimize_nv(sc, code);
 
       if ((!bodyf) &&
-	  (is_fxable(sc, body)) &&     /* happens very rarely, #_* as car etc */
-	  (is_c_function(car(body))))
-	bodyf = s7_optimize_nv(sc, set_dlist_1(sc, set_ulist_1(sc, c_function_name_to_symbol(sc, car(body)), cdr(body))));
+          (is_fxable(sc, body)) &&     /* happens very rarely, #_* as car etc */
+          (is_c_function(car(body))))
+        bodyf = s7_optimize_nv(sc, set_dlist_1(sc, set_ulist_1(sc, c_function_name_to_symbol(sc, car(body)), cdr(body))));
 
       if (bodyf)
-	{
-	  if (steppers == 1)                                /* one expr body, 1 stepper */
-	    {
-	      s7_pointer stepa = car(slot_expression(stepper));
-	      s7_function stepf = fx_proc(slot_expression(stepper));
-	      if (((stepf == fx_add_t1) || (stepf == fx_add_u1)) && (is_t_integer(slot_value(stepper))))
-		{
-		  s7_int i = integer(slot_value(stepper));
-		  opt_info *o = sc->opts[0];
-		  if (bodyf == opt_cell_any_nv)
-		    {
-		      s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-		      if (!((fp == opt_p_pip_sso) && (o->v[2].p == o->v[4].p) &&
-			    (((o->v[5].p_pip_f == string_set_p_pip_unchecked) && (o->v[6].p_pi_f == string_ref_p_pi_unchecked)) ||
-			     ((o->v[5].p_pip_f == string_set_p_pip_direct) && (o->v[6].p_pi_f == string_ref_p_pi_direct)) ||
-			     ((o->v[5].p_pip_f == vector_set_p_pip_unchecked) && (o->v[6].p_pi_f == t_vector_ref_p_pi_unchecked)) ||
-			     ((o->v[5].p_pip_f == t_vector_set_p_pip_direct) && (o->v[6].p_pi_f == t_vector_ref_p_pi_direct)) ||
-			     ((o->v[5].p_pip_f == list_set_p_pip_unchecked) && (o->v[6].p_pi_f == list_ref_p_pi_unchecked))) &&
-			    (copy_if_end_ok(sc, slot_value(o->v[1].p), slot_value(o->v[3].p), i, endp, stepper))))
-			{
-			  if (has_loop_end(stepper))
-			    {                /* (do ((val 0) (i 0 (+ i 1))) ((= i 1) val) (set! val (real-part (v b1 b2)))) */
-			      s7_int lim = loop_end(stepper);
-			      if ((i >= 0) && (lim < NUM_SMALL_INTS))
-				do {fp(o); slot_set_value(stepper, small_int(++i));} while (i < lim);
-			      else do {fp(o); slot_set_value(stepper, make_integer(sc, ++i));} while (i < lim);
-			      sc->value = sc->T;
-			    }
-			  else
-			    do {             /* (do ((i start (+ i 1))) ((= end i)) (display i)) */
-			      fp(o);
-			      slot_set_value(stepper, make_integer(sc, ++i));
-			    } while ((sc->value = endf(sc, endp)) == sc->F);
-			}}
-		  else
-		    if (!(((bodyf == opt_float_any_nv) && (o->v[0].fd == opt_d_7pid_ss_ss) &&
-			   (o->v[2].p == o->v[6].p) &&
-			   ((o->v[4].d_7pid_f == float_vector_set_d_7pid) || (o->v[4].d_7pid_f == float_vector_set_d_7pid_direct)) &&
-			   ((o->v[3].d_7pi_f == float_vector_ref_d_7pi) || (o->v[3].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
-			   (copy_if_end_ok(sc, slot_value(o->v[1].p), slot_value(o->v[5].p), i, endp, stepper))) ||
-
-			  ((bodyf == opt_int_any_nv) && ((o->v[0].fi == opt_i_7pii_ssf) || (o->v[0].fi == opt_i_7pii_ssf_vset)) &&
-			   (o->v[2].p == o->v[4].o1->v[2].p) &&
-			   (((o->v[3].i_7pii_f == int_vector_set_i_7pii) && (o->v[4].o1->v[3].i_7pi_f == int_vector_ref_i_7pi)) ||
-			    ((o->v[3].i_7pii_f == int_vector_set_i_7pii_direct) && (o->v[4].o1->v[3].i_7pi_f == int_vector_ref_i_pi_direct))) &&
-			   (copy_if_end_ok(sc, slot_value(o->v[1].p), slot_value(o->v[4].o1->v[1].p), i, endp, stepper)))))
-		      /* here the has_loop_end business doesn't happen much */
-		      do {                 /* (do ((count 0) (i 7 (+ i 1))) ((= i 10) count) (set! count (quotient i 3))) */
-			bodyf(sc);
-			slot_set_value(stepper, make_integer(sc, ++i));
-		      } while ((sc->value = endf(sc, endp)) == sc->F);
-		  sc->code = cdr(end);
-		  return(goto_do_end_clauses);
-		}
-	      do {              /* (do ((count 0.0) (i 7.0 (+ i 1.0))) ((>= i 10.0) count) (set! count (modulo i 3.0))) */
-		bodyf(sc);
-		slot_set_value(stepper, stepf(sc, stepa));
-	      } while ((sc->value = endf(sc, endp)) == sc->F);
-	      sc->code = cdr(end);
-	      return(goto_do_end_clauses);
-	    }
-
-	  if ((steppers == 2) &&
-	      (!tis_slot(next_slot(next_slot(slots)))))
-	    {
-	      s7_pointer s1 = slots, s2 = next_slot(slots);
-	      s7_function f1 = fx_proc(slot_expression(s1));
-	      s7_function f2 = fx_proc(slot_expression(s2));
-	      s7_pointer p1 = car(slot_expression(s1));
-	      s7_pointer p2 = car(slot_expression(s2));
-	      /* split out opt_float_any_nv gained nothing (see tmp), same for opt_cell_any_nv, constant end value was never hit */
-	      if (bodyf == opt_cell_any_nv)
-		{
-		  opt_info *o = sc->opts[0];
-		  s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-		  s7_pointer s3 = NULL;
-		  /* thash case -- this is dumb */
-		  if ((f2 == fx_add_u1) && (is_t_integer(slot_value(s2))) && (cadr(endp) == slot_symbol(s2)) && (!s7_tree_memq(sc, cadr(endp), body)) &&
-		      (((endf == fx_num_eq_ui) && (is_t_integer(caddr(endp)))) ||
-		       ((endf == fx_num_eq_us) && (s3 = opt_integer_symbol(sc, caddr(endp))) && (!s7_tree_memq(sc, caddr(endp), body)))))
-		    { /* (do ((i 0 (+ i 1)) (z (random 100) (random 100))) ((= i 5000000) counts) (hash-table-set! counts z (+ (or (hash-table-ref counts z) 0) 1))) */
-		      s7_int i = integer(slot_value(s2));
-		      s7_int endi = (is_t_integer(caddr(endp))) ? integer(caddr(endp)) : integer(slot_value(s3));
-		      do {
-			fp(o);
-			slot_set_value(s1, f1(sc, p1));
-			i++;
-		      } while (i < endi);
-		      slot_set_value(s2, make_integer(sc, endi));
-		    }
-		  else
-		    do {          /* (do ((i 0 (+ i 1)) (lst lis (cdr lst))) ((= i (- len 1)) (reverse result)) (set! result (cons (car lst) result))) */
-		      fp(o);
-		      slot_set_value(s1, f1(sc, p1));
-		      slot_set_value(s2, f2(sc, p2));
-		    } while ((sc->value = endf(sc, endp)) == sc->F);
-		}
-	      else
-		do {              /* (do ((i 0 (+ i 1)) (j 0 (+ j 1))) ((= i 3) x) (set! x (max x (* i j)))) */
-		  bodyf(sc);
-		  slot_set_value(s1, f1(sc, p1));
-		  slot_set_value(s2, f2(sc, p2));
-		} while ((sc->value = endf(sc, endp)) == sc->F);
-	      sc->code = cdr(end);
-	      return(goto_do_end_clauses);
-	    }
-	  if (bodyf == opt_cell_any_nv)
-	    {                     /* (do ((i npats (- i 1)) (ipats ipats (cdr ipats)) (a '())) ((zero? i) a) (set! a (cons (car ipats) a))) */
-	      opt_info *o = sc->opts[0];
-	      s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-	      do {
-		s7_pointer slot1 = slots;
-		fp(o);
-		do {
-		  if (slot_has_expression(slot1))
-		    slot_set_value(slot1, fx_call(sc, slot_expression(slot1)));
-		  slot1 = next_slot(slot1);
-		} while (tis_slot(slot1));
-	      } while ((sc->value = endf(sc, endp)) == sc->F);
-	    }
-	  else
-	    do { /* (do ((i 0 (+ i 1)) (ph 0.0 (+ ph incr)) (kph 0.0 (+ kph kincr))) ((= i 4410)) (float-vector-set! v1 i (+ (cos ph) (cos kph)))) */
-	      s7_pointer slot1 = slots;
-	      bodyf(sc);
-	      do {
-		if (slot_has_expression(slot1))
-		  slot_set_value(slot1, fx_call(sc, slot_expression(slot1)));
-		slot1 = next_slot(slot1);
-	      } while (tis_slot(slot1));
-	    } while ((sc->value = endf(sc, endp)) == sc->F);
-	  sc->code = cdr(end);
-	  return(goto_do_end_clauses);
-	}
+        {
+          if (steppers == 1)                                /* one expr body, 1 stepper */
+            {
+              s7_pointer stepa = car(slot_expression(stepper));
+              s7_function stepf = fx_proc(slot_expression(stepper));
+              if (((stepf == fx_add_t1) || (stepf == fx_add_u1)) && (is_t_integer(slot_value(stepper))))
+                {
+                  s7_int i = integer(slot_value(stepper));
+                  opt_info *o = sc->opts[0];
+                  if (bodyf == opt_cell_any_nv)
+                    {
+                      s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+                      if (!((fp == opt_p_pip_sso) && (o->v[2].p == o->v[4].p) &&
+                            (((o->v[5].p_pip_f == string_set_p_pip_unchecked) && (o->v[6].p_pi_f == string_ref_p_pi_unchecked)) ||
+                             ((o->v[5].p_pip_f == string_set_p_pip_direct) && (o->v[6].p_pi_f == string_ref_p_pi_direct)) ||
+                             ((o->v[5].p_pip_f == vector_set_p_pip_unchecked) && (o->v[6].p_pi_f == t_vector_ref_p_pi_unchecked)) ||
+                             ((o->v[5].p_pip_f == t_vector_set_p_pip_direct) && (o->v[6].p_pi_f == t_vector_ref_p_pi_direct)) ||
+                             ((o->v[5].p_pip_f == list_set_p_pip_unchecked) && (o->v[6].p_pi_f == list_ref_p_pi_unchecked))) &&
+                            (copy_if_end_ok(sc, slot_value(o->v[1].p), slot_value(o->v[3].p), i, endp, stepper))))
+                        {
+                          if (has_loop_end(stepper))
+                            {                /* (do ((val 0) (i 0 (+ i 1))) ((= i 1) val) (set! val (real-part (v b1 b2)))) */
+                              s7_int lim = loop_end(stepper);
+                              if ((i >= 0) && (lim < NUM_SMALL_INTS))
+                                do {fp(o); slot_set_value(stepper, small_int(++i));} while (i < lim);
+                              else do {fp(o); slot_set_value(stepper, make_integer(sc, ++i));} while (i < lim);
+                              sc->value = sc->T;
+                            }
+                          else
+                            do {             /* (do ((i start (+ i 1))) ((= end i)) (display i)) */
+                              fp(o);
+                              slot_set_value(stepper, make_integer(sc, ++i));
+                            } while ((sc->value = endf(sc, endp)) == sc->F);
+                        }}
+                  else
+                    if (!(((bodyf == opt_float_any_nv) && (o->v[0].fd == opt_d_7pid_ss_ss) &&
+                           (o->v[2].p == o->v[6].p) &&
+                           ((o->v[4].d_7pid_f == float_vector_set_d_7pid) || (o->v[4].d_7pid_f == float_vector_set_d_7pid_direct)) &&
+                           ((o->v[3].d_7pi_f == float_vector_ref_d_7pi) || (o->v[3].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
+                           (copy_if_end_ok(sc, slot_value(o->v[1].p), slot_value(o->v[5].p), i, endp, stepper))) ||
+
+                          ((bodyf == opt_int_any_nv) && ((o->v[0].fi == opt_i_7pii_ssf) || (o->v[0].fi == opt_i_7pii_ssf_vset)) &&
+                           (o->v[2].p == o->v[4].o1->v[2].p) &&
+                           (((o->v[3].i_7pii_f == int_vector_set_i_7pii) && (o->v[4].o1->v[3].i_7pi_f == int_vector_ref_i_7pi)) ||
+                            ((o->v[3].i_7pii_f == int_vector_set_i_7pii_direct) && (o->v[4].o1->v[3].i_7pi_f == int_vector_ref_i_pi_direct))) &&
+                           (copy_if_end_ok(sc, slot_value(o->v[1].p), slot_value(o->v[4].o1->v[1].p), i, endp, stepper)))))
+                      /* here the has_loop_end business doesn't happen much */
+                      do {                 /* (do ((count 0) (i 7 (+ i 1))) ((= i 10) count) (set! count (quotient i 3))) */
+                        bodyf(sc);
+                        slot_set_value(stepper, make_integer(sc, ++i));
+                      } while ((sc->value = endf(sc, endp)) == sc->F);
+                  sc->code = cdr(end);
+                  return(goto_do_end_clauses);
+                }
+              do {              /* (do ((count 0.0) (i 7.0 (+ i 1.0))) ((>= i 10.0) count) (set! count (modulo i 3.0))) */
+                bodyf(sc);
+                slot_set_value(stepper, stepf(sc, stepa));
+              } while ((sc->value = endf(sc, endp)) == sc->F);
+              sc->code = cdr(end);
+              return(goto_do_end_clauses);
+            }
+
+          if ((steppers == 2) &&
+              (!tis_slot(next_slot(next_slot(slots)))))
+            {
+              s7_pointer s1 = slots, s2 = next_slot(slots);
+              s7_function f1 = fx_proc(slot_expression(s1));
+              s7_function f2 = fx_proc(slot_expression(s2));
+              s7_pointer p1 = car(slot_expression(s1));
+              s7_pointer p2 = car(slot_expression(s2));
+              /* split out opt_float_any_nv gained nothing (see tmp), same for opt_cell_any_nv, constant end value was never hit */
+              if (bodyf == opt_cell_any_nv)
+                {
+                  opt_info *o = sc->opts[0];
+                  s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+                  s7_pointer s3 = NULL;
+                  /* thash case -- this is dumb */
+                  if ((f2 == fx_add_u1) && (is_t_integer(slot_value(s2))) && (cadr(endp) == slot_symbol(s2)) && (!s7_tree_memq(sc, cadr(endp), body)) &&
+                      (((endf == fx_num_eq_ui) && (is_t_integer(caddr(endp)))) ||
+                       ((endf == fx_num_eq_us) && (s3 = opt_integer_symbol(sc, caddr(endp))) && (!s7_tree_memq(sc, caddr(endp), body)))))
+                    { /* (do ((i 0 (+ i 1)) (z (random 100) (random 100))) ((= i 5000000) counts) (hash-table-set! counts z (+ (or (hash-table-ref counts z) 0) 1))) */
+                      s7_int i = integer(slot_value(s2));
+                      s7_int endi = (is_t_integer(caddr(endp))) ? integer(caddr(endp)) : integer(slot_value(s3));
+                      do {
+                        fp(o);
+                        slot_set_value(s1, f1(sc, p1));
+                        i++;
+                      } while (i < endi);
+                      slot_set_value(s2, make_integer(sc, endi));
+                    }
+                  else
+                    do {          /* (do ((i 0 (+ i 1)) (lst lis (cdr lst))) ((= i (- len 1)) (reverse result)) (set! result (cons (car lst) result))) */
+                      fp(o);
+                      slot_set_value(s1, f1(sc, p1));
+                      slot_set_value(s2, f2(sc, p2));
+                    } while ((sc->value = endf(sc, endp)) == sc->F);
+                }
+              else
+                do {              /* (do ((i 0 (+ i 1)) (j 0 (+ j 1))) ((= i 3) x) (set! x (max x (* i j)))) */
+                  bodyf(sc);
+                  slot_set_value(s1, f1(sc, p1));
+                  slot_set_value(s2, f2(sc, p2));
+                } while ((sc->value = endf(sc, endp)) == sc->F);
+              sc->code = cdr(end);
+              return(goto_do_end_clauses);
+            }
+          if (bodyf == opt_cell_any_nv)
+            {                     /* (do ((i npats (- i 1)) (ipats ipats (cdr ipats)) (a '())) ((zero? i) a) (set! a (cons (car ipats) a))) */
+              opt_info *o = sc->opts[0];
+              s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+              do {
+                s7_pointer slot1 = slots;
+                fp(o);
+                do {
+                  if (slot_has_expression(slot1))
+                    slot_set_value(slot1, fx_call(sc, slot_expression(slot1)));
+                  slot1 = next_slot(slot1);
+                } while (tis_slot(slot1));
+              } while ((sc->value = endf(sc, endp)) == sc->F);
+            }
+          else
+            do { /* (do ((i 0 (+ i 1)) (ph 0.0 (+ ph incr)) (kph 0.0 (+ kph kincr))) ((= i 4410)) (float-vector-set! v1 i (+ (cos ph) (cos kph)))) */
+              s7_pointer slot1 = slots;
+              bodyf(sc);
+              do {
+                if (slot_has_expression(slot1))
+                  slot_set_value(slot1, fx_call(sc, slot_expression(slot1)));
+                slot1 = next_slot(slot1);
+              } while (tis_slot(slot1));
+            } while ((sc->value = endf(sc, endp)) == sc->F);
+          sc->code = cdr(end);
+          return(goto_do_end_clauses);
+        }
 
       if ((steppers == 1) &&
-	  (car(body) == sc->set_symbol) &&
-	  (is_pair(cdr(body))) &&
-	  (is_symbol(cadr(body))) &&
-	  (is_pair(cddr(body))) &&
-	  ((has_fx(cddr(body))) || (is_fxable(sc, caddr(body)))) &&
-	  (is_null(cdddr(body))))
-	{
-	  s7_pointer val = cddr(body), stepa;
-	  s7_function stepf, valf;
-	  s7_pointer slot = s7_slot(sc, cadr(body));
-	  if (slot == sc->undefined)      /* (let ((lim 1)) (define (f) (let ((y 1)) (do ((i 0 (+ i y))) ((= i lim)) (set! xxx 3)))) (f)) */
-	    unbound_variable_error_nr(sc, cadr(body));
-	  /* here we could jump to the end of this procedure (unsetting op_dox etc) to avoid (set! a a) as an error if 'a is immutable */
-	  if (is_immutable_slot(slot))    /* (let ((lim 1)) (define-constant x 1) (define (f) (let ((y 1)) (do ((i 0 (+ i y))) ((= i lim)) (set! x 3)))) (f)) */
-	    immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "~S is immutable in ~S", 21), cadr(body), body)); /* "x is immutable in (set! x 3)" */
-
-	  if (!has_fx(val))
-	    set_fx(val, fx_choose(sc, val, sc->curlet, let_symbol_is_safe));
-	  valf = fx_proc(val);
-	  val = car(val);
-	  stepf = fx_proc(slot_expression(stepper));
-	  stepa = car(slot_expression(stepper));
-	  do {             /* (do ((i 1 4)) ((> i 3)) (set! x (+ x i))) */
-	    slot_set_value(slot, valf(sc, val));
-	    slot_set_value(stepper, stepf(sc, stepa));
-	  } while ((sc->value = endf(sc, endp)) == sc->F);
-	  sc->code = cdr(end);
-	  return(goto_do_end_clauses);
-	}}
+          (car(body) == sc->set_symbol) &&
+          (is_pair(cdr(body))) &&
+          (is_symbol(cadr(body))) &&
+          (is_pair(cddr(body))) &&
+          ((has_fx(cddr(body))) || (is_fxable(sc, caddr(body)))) &&
+          (is_null(cdddr(body))))
+        {
+          s7_pointer val = cddr(body), stepa;
+          s7_function stepf, valf;
+          s7_pointer slot = s7_slot(sc, cadr(body));
+          if (slot == sc->undefined)      /* (let ((lim 1)) (define (f) (let ((y 1)) (do ((i 0 (+ i y))) ((= i lim)) (set! xxx 3)))) (f)) */
+            unbound_variable_error_nr(sc, cadr(body));
+          /* here we could jump to the end of this procedure (unsetting op_dox etc) to avoid (set! a a) as an error if 'a is immutable */
+          if (is_immutable_slot(slot))    /* (let ((lim 1)) (define-constant x 1) (define (f) (let ((y 1)) (do ((i 0 (+ i y))) ((= i lim)) (set! x 3)))) (f)) */
+            immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "~S is immutable in ~S", 21), cadr(body), body)); /* "x is immutable in (set! x 3)" */
+
+          if (!has_fx(val))
+            set_fx(val, fx_choose(sc, val, sc->curlet, let_symbol_is_safe));
+          valf = fx_proc(val);
+          val = car(val);
+          stepf = fx_proc(slot_expression(stepper));
+          stepa = car(slot_expression(stepper));
+          do {             /* (do ((i 1 4)) ((> i 3)) (set! x (+ x i))) */
+            slot_set_value(slot, valf(sc, val));
+            slot_set_value(stepper, stepf(sc, stepa));
+          } while ((sc->value = endf(sc, endp)) == sc->F);
+          sc->code = cdr(end);
+          return(goto_do_end_clauses);
+        }}
   else /* more than one expr */
     {
       s7_pointer p = code;
@@ -82680,86 +82680,86 @@ static goto_t op_dox(s7_scheme *sc)
 
       if ((!no_cell_opt(code)) &&
 #if WITH_GMP
-	  (!got_bignum) &&
-#endif
-	  (has_safe_steppers(sc, sc->curlet)))
-	{
-	  sc->pc = 0;
-	  for (int32_t k = 0; (is_pair(p)) && (k < MAX_OPT_BODY_SIZE); k++, p = cdr(p), body_len++)
-	    {
-	      opt_info *start = sc->opts[sc->pc];
-	      if (!cell_optimize(sc, p))
-		{
-		  set_no_cell_opt(code);
-		  p = code;
-		  break;
-		}
-	      oo_idp_nr_fixup(start);
-	      body[k] = start;
-	    }
-	  use_opts = is_null(p);
-	}
+          (!got_bignum) &&
+#endif
+          (has_safe_steppers(sc, sc->curlet)))
+        {
+          sc->pc = 0;
+          for (int32_t k = 0; (is_pair(p)) && (k < MAX_OPT_BODY_SIZE); k++, p = cdr(p), body_len++)
+            {
+              opt_info *start = sc->opts[sc->pc];
+              if (!cell_optimize(sc, p))
+                {
+                  set_no_cell_opt(code);
+                  p = code;
+                  break;
+                }
+              oo_idp_nr_fixup(start);
+              body[k] = start;
+            }
+          use_opts = is_null(p);
+        }
 
       if (p == code)
-	for (; is_pair(p); p = cdr(p))
-	  if (!is_fxable(sc, car(p)))
-	    break;
+        for (; is_pair(p); p = cdr(p))
+          if (!is_fxable(sc, car(p)))
+            break;
 
       if (is_null(p))
-	{
-	  s7_pointer stepa = NULL;
-	  s7_function stepf = NULL;
-	  if (!use_opts)
-	    fx_annotate_args(sc, code, sc->curlet);
-	  if (stepper)
-	    {
-	      stepf = fx_proc(slot_expression(stepper));
-	      stepa = car(slot_expression(stepper));
-	    }
-	  while (true) /* (do ((i 0 (+ 1 i))) ((= end i)) (set! end 8) (display i)) */
-	    {
-	      if (use_opts)
-		for (int32_t i = 0; i < body_len; i++)
-		  body[i]->v[0].fp(body[i]);
-	      /* opt_set_p_d_f shoot: 144,186,857  => s7.c:opt_set_p_d_f (2,093,278x) (b also, big/fft as part of fft code 7M) */
-	      else
-		for (p = code; is_pair(p); p = cdr(p))
-		  fx_call(sc, p);
-
-	      if (steppers == 1)
-		slot_set_value(stepper, stepf(sc, stepa));
-	      else
-		{
-		  s7_pointer slot = slots;
-		  do {
-		    if (slot_has_expression(slot))
-		      slot_set_value(slot, fx_call(sc, slot_expression(slot)));
-		    slot = next_slot(slot);
-		  } while (tis_slot(slot));
-		}
-	      if (is_true(sc, sc->value = endf(sc, endp)))
-		{
-		  sc->code = cdr(end);
-		  return(goto_do_end_clauses);
-		}}}}
+        {
+          s7_pointer stepa = NULL;
+          s7_function stepf = NULL;
+          if (!use_opts)
+            fx_annotate_args(sc, code, sc->curlet);
+          if (stepper)
+            {
+              stepf = fx_proc(slot_expression(stepper));
+              stepa = car(slot_expression(stepper));
+            }
+          while (true) /* (do ((i 0 (+ 1 i))) ((= end i)) (set! end 8) (display i)) */
+            {
+              if (use_opts)
+                for (int32_t i = 0; i < body_len; i++)
+                  body[i]->v[0].fp(body[i]);
+              /* opt_set_p_d_f shoot: 144,186,857  => s7.c:opt_set_p_d_f (2,093,278x) (b also, big/fft as part of fft code 7M) */
+              else
+                for (p = code; is_pair(p); p = cdr(p))
+                  fx_call(sc, p);
+
+              if (steppers == 1)
+                slot_set_value(stepper, stepf(sc, stepa));
+              else
+                {
+                  s7_pointer slot = slots;
+                  do {
+                    if (slot_has_expression(slot))
+                      slot_set_value(slot, fx_call(sc, slot_expression(slot)));
+                    slot = next_slot(slot);
+                  } while (tis_slot(slot));
+                }
+              if (is_true(sc, sc->value = endf(sc, endp)))
+                {
+                  sc->code = cdr(end);
+                  return(goto_do_end_clauses);
+                }}}}
   if ((is_null(cdr(code))) && /* one expr */
       (is_pair(car(code))))
     {
       code = car(code);
       if ((is_syntactic_pair(code)) ||
-	  (is_symbol_and_syntactic(car(code))))
-	{
-	  push_stack_no_args_direct(sc, OP_DOX_STEP_O);
-	  if (is_syntactic_pair(code))
-	    sc->cur_op = (opcode_t)optimize_op(code);
-	  else
-	    {
-	      sc->cur_op = (opcode_t)symbol_syntax_op_checked(code);
-	      pair_set_syntax_op(code, sc->cur_op);
-	    }
-	  sc->code = code;
-	  return(goto_top_no_pop);
-	}}
+          (is_symbol_and_syntactic(car(code))))
+        {
+          push_stack_no_args_direct(sc, OP_DOX_STEP_O);
+          if (is_syntactic_pair(code))
+            sc->cur_op = (opcode_t)optimize_op(code);
+          else
+            {
+              sc->cur_op = (opcode_t)symbol_syntax_op_checked(code);
+              pair_set_syntax_op(code, sc->cur_op);
+            }
+          sc->code = code;
+          return(goto_top_no_pop);
+        }}
   pair_set_syntax_op(form, OP_DOX_INIT);
   sc->code = T_Pair(cddr(sc->code));
   push_stack_no_args(sc, (intptr_t)((is_null(cdr(sc->code))) ? OP_DOX_STEP_O : OP_DOX_STEP), cdr(form));
@@ -82826,17 +82826,17 @@ static void op_dox_no_body(s7_scheme *sc)
        */
       slot_set_value(slot, istep);
       if (testf == fx_or_2a)
-	{
-	  s7_pointer t1 = cadr(test);
-	  s7_pointer t2 = caddr(test);
-	  s7_function f1 = fx_proc(cdr(test));
-	  s7_function f2 = fx_proc(cddr(test));
-	  while ((f1(sc, t1) == sc->F) && (f2(sc, t2) == sc->F))
-	    integer(istep) += incr;
-	}
+        {
+          s7_pointer t1 = cadr(test);
+          s7_pointer t2 = caddr(test);
+          s7_function f1 = fx_proc(cdr(test));
+          s7_function f2 = fx_proc(cddr(test));
+          while ((f1(sc, t1) == sc->F) && (f2(sc, t2) == sc->F))
+            integer(istep) += incr;
+        }
       else while (testf(sc, test) == sc->F) {integer(istep) += incr;}
       if (is_small_int(integer(istep)))
-	slot_set_value(slot, small_int(integer(istep)));
+        slot_set_value(slot, small_int(integer(istep)));
       else clear_mutable_integer(istep); /* just clears the T_MUTABLE bit */
       sc->value = fx_call(sc, result);
     }
@@ -82845,27 +82845,27 @@ static void op_dox_no_body(s7_scheme *sc)
       s7_function stepf = fx_proc(cddr(var));
       s7_pointer step = caddr(var);
       if (testf == fx_or_and_2a)
-	{
-	  s7_pointer f1_arg = cadr(test), p = opt3_pair(test); /* cdadr(p) */
-	  s7_function f1 = fx_proc(cdr(test));
-	  s7_pointer f2_arg = car(p);
-	  s7_pointer f3_arg = cadr(p);
-	  s7_function f2 = fx_proc(p);
-	  s7_function f3 = fx_proc(cdr(p));
-	  if (((stepf == fx_add_t1) || (stepf == fx_add_u1)) && (is_t_integer(slot_value(slot))))
-	    {
-	      s7_pointer ip = make_mutable_integer(sc, integer(slot_value(slot)));
-	      slot_set_value(slot, ip);
-	      while ((f1(sc, f1_arg) == sc->F) &&
-		     ((f2(sc, f2_arg) == sc->F) || (f3(sc, f3_arg) == sc->F)))
-		integer(ip)++;
-	      clear_mutable_integer(ip);
-	    }
-	  else
-	    while ((f1(sc, f1_arg) == sc->F) &&
-		   ((f2(sc, f2_arg) == sc->F) || (f3(sc, f3_arg) == sc->F)))
-	      slot_set_value(slot, stepf(sc, step));
-	}
+        {
+          s7_pointer f1_arg = cadr(test), p = opt3_pair(test); /* cdadr(p) */
+          s7_function f1 = fx_proc(cdr(test));
+          s7_pointer f2_arg = car(p);
+          s7_pointer f3_arg = cadr(p);
+          s7_function f2 = fx_proc(p);
+          s7_function f3 = fx_proc(cdr(p));
+          if (((stepf == fx_add_t1) || (stepf == fx_add_u1)) && (is_t_integer(slot_value(slot))))
+            {
+              s7_pointer ip = make_mutable_integer(sc, integer(slot_value(slot)));
+              slot_set_value(slot, ip);
+              while ((f1(sc, f1_arg) == sc->F) &&
+                     ((f2(sc, f2_arg) == sc->F) || (f3(sc, f3_arg) == sc->F)))
+                integer(ip)++;
+              clear_mutable_integer(ip);
+            }
+          else
+            while ((f1(sc, f1_arg) == sc->F) &&
+                   ((f2(sc, f2_arg) == sc->F) || (f3(sc, f3_arg) == sc->F)))
+              slot_set_value(slot, stepf(sc, step));
+        }
       else while (testf(sc, test) == sc->F) {slot_set_value(slot, stepf(sc, step));}
       sc->value = fx_call(sc, result);
     }
@@ -82882,12 +82882,12 @@ static void op_dox_pending_no_body(s7_scheme *sc)
     {
       add_slot(sc, let, caar(vars), fx_call(sc, cdar(vars)));
       if (is_pair(cddar(vars)))
-	slot_set_expression(let_slots(let), cddar(vars));
+        slot_set_expression(let_slots(let), cddar(vars));
       else
-	{
-	  all_steps = false;
-	  slot_just_set_expression(let_slots(let), sc->nil);
-	}}
+        {
+          all_steps = false;
+          slot_just_set_expression(let_slots(let), sc->nil);
+        }}
   slots = let_slots(let);
   set_curlet(sc, let);
   sc->temp1 = sc->unused;
@@ -82903,11 +82903,11 @@ static void op_dox_pending_no_body(s7_scheme *sc)
       s7_pointer slot2 = next_slot(slot1);
       s7_pointer expr2 = slot_expression(slot2);
       while (fx_call(sc, test) == sc->F)
-	{
-	  slot_simply_set_pending_value(slot1, fx_call(sc, expr1)); /* use pending_value for GC protection */
-	  slot_set_value(slot2, fx_call(sc, expr2));
-	  slot_set_value(slot1, slot_pending_value(slot1));
-	}
+        {
+          slot_simply_set_pending_value(slot1, fx_call(sc, expr1)); /* use pending_value for GC protection */
+          slot_set_value(slot2, fx_call(sc, expr2));
+          slot_set_value(slot1, slot_pending_value(slot1));
+        }
       sc->code = cdr(test);
       let_clear_has_pending_value(sc, sc->curlet);
       return;
@@ -82916,15 +82916,15 @@ static void op_dox_pending_no_body(s7_scheme *sc)
     {
       s7_pointer slt = slots;
       do {
-	if (slot_has_expression(slt))
-	  slot_simply_set_pending_value(slt, fx_call(sc, slot_expression(slt)));
-	slt = next_slot(slt);
+        if (slot_has_expression(slt))
+          slot_simply_set_pending_value(slt, fx_call(sc, slot_expression(slt)));
+        slt = next_slot(slt);
       } while (tis_slot(slt));
       slt = slots;
       do {
-	if (slot_has_expression(slt))
-	  slot_set_value(slt, slot_pending_value(slt));
-	slt = next_slot(slt);
+        if (slot_has_expression(slt))
+          slot_set_value(slt, slot_pending_value(slt));
+        slt = next_slot(slt);
       } while (tis_slot(slt));
     }
   sc->code = cdr(test);
@@ -82943,33 +82943,33 @@ static bool op_do_no_vars(s7_scheme *sc)
     {
       body[i] = sc->opts[sc->pc];
       if (!cell_optimize(sc, p))
-	break;
+        break;
     }
   if (is_null(p))
     {
       s7_pointer end = cadr(sc->code);
       set_curlet(sc, inline_make_let(sc, sc->curlet));
       if (i == 1)
-	while ((sc->value = fx_call(sc, end)) == sc->F) body[0]->v[0].fp(body[0]); /* presetting body[0] and body[0]->v[0].fp is not faster */
+        while ((sc->value = fx_call(sc, end)) == sc->F) body[0]->v[0].fp(body[0]); /* presetting body[0] and body[0]->v[0].fp is not faster */
       else
-	if (i == 2)
-	  {
-	    opt_info *o0 = body[0], *o1 = body[1];
-	    s7_pointer (*fp0)(opt_info *o) = o0->v[0].fp;
-	    s7_pointer (*fp1)(opt_info *o) = o1->v[0].fp;
-	    while ((sc->value = fx_call(sc, end)) == sc->F) {fp0(o0); fp1(o1);}
-	  }
-	else
-	  if (i == 0) /* null body! */
-	    {
-	      s7_function endf = fx_proc(end);
-	      s7_pointer endp = car(end);
-	      while (!is_true(sc, sc->value = endf(sc, endp))); /* the assignment is (normally) in the noise */
-	    }
-	  else
-	    while ((sc->value = fx_call(sc, end)) == sc->F)
-	      for (int32_t k = 0; k < i; k++)
-		body[k]->v[0].fp(body[k]);
+        if (i == 2)
+          {
+            opt_info *o0 = body[0], *o1 = body[1];
+            s7_pointer (*fp0)(opt_info *o) = o0->v[0].fp;
+            s7_pointer (*fp1)(opt_info *o) = o1->v[0].fp;
+            while ((sc->value = fx_call(sc, end)) == sc->F) {fp0(o0); fp1(o1);}
+          }
+        else
+          if (i == 0) /* null body! */
+            {
+              s7_function endf = fx_proc(end);
+              s7_pointer endp = car(end);
+              while (!is_true(sc, sc->value = endf(sc, endp))); /* the assignment is (normally) in the noise */
+            }
+          else
+            while ((sc->value = fx_call(sc, end)) == sc->F)
+              for (int32_t k = 0; k < i; k++)
+                body[k]->v[0].fp(body[k]);
       sc->code = cdr(end); /* inner let still active during result */
       return(true);
     }
@@ -83017,11 +83017,11 @@ static void op_do_no_body_na_vars(s7_scheme *sc) /* vars fxable, end-test not */
     {
       add_slot(sc, let, caar(vars), fx_call(sc, cdar(vars)));
       if (is_pair(cddar(vars)))
-	{
-	  slot_set_expression(let_slots(let), cddar(vars));
-	  steppers++;
-	  stepper = let_slots(let);
-	}
+        {
+          slot_set_expression(let_slots(let), cddar(vars));
+          steppers++;
+          stepper = let_slots(let);
+        }
       else slot_just_set_expression(let_slots(let), sc->nil);
     }
   if (steppers == 1) let_set_dox_slot1(let, stepper);
@@ -83065,31 +83065,31 @@ static bool do_step1(s7_scheme *sc)
     {
       s7_pointer code;
       if (is_null(sc->args)) /* after getting the new values, transfer them into the slot_values */
-	{
-	  for (s7_pointer x = sc->code; is_pair(x); x = cdr(x))   /* sc->code here is the original sc->args list */
-	    {
-	      s7_pointer slot = car(x);
-	      if (is_immutable_slot(slot))    /* (let () (define (func) (do ((x 0) (i 0 (+ i 1))) ((= i 1) x) (set! x (immutable! 'i)))) (func)) */
-		immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "~S is immutable in ~S", 21), slot_symbol(slot), car(slot_expression(slot))));
-	      slot_set_value(slot, slot_pending_value(slot));
-	      slot_clear_has_pending_value(slot);
-	    }
-	  pop_stack_no_op(sc);
-	  return(true);
-	}
+        {
+          for (s7_pointer x = sc->code; is_pair(x); x = cdr(x))   /* sc->code here is the original sc->args list */
+            {
+              s7_pointer slot = car(x);
+              if (is_immutable_slot(slot))    /* (let () (define (func) (do ((x 0) (i 0 (+ i 1))) ((= i 1) x) (set! x (immutable! 'i)))) (func)) */
+                immutable_object_error_nr(sc, set_elist_3(sc, wrap_string(sc, "~S is immutable in ~S", 21), slot_symbol(slot), car(slot_expression(slot))));
+              slot_set_value(slot, slot_pending_value(slot));
+              slot_clear_has_pending_value(slot);
+            }
+          pop_stack_no_op(sc);
+          return(true);
+        }
       code = T_Pair(slot_expression(car(sc->args))); /* get the next stepper new value */
       if (has_fx(code))
-	{
-	  sc->value = fx_call(sc, code);
-	  slot_set_pending_value(car(sc->args), sc->value); /* consistently slower if slot_simply_set... here? */
-	  sc->args = T_Lst(cdr(sc->args));           /* go to next step var */
-	}
+        {
+          sc->value = fx_call(sc, code);
+          slot_set_pending_value(car(sc->args), sc->value); /* consistently slower if slot_simply_set... here? */
+          sc->args = T_Lst(cdr(sc->args));           /* go to next step var */
+        }
       else
-	{
-	  push_stack_direct(sc, OP_DO_STEP2);
-	  sc->code = car(code);
-	  return(false);
-	}}
+        {
+          push_stack_direct(sc, OP_DO_STEP2);
+          sc->code = car(code);
+          return(false);
+        }}
 }
 
 static bool op_do_step2(s7_scheme *sc)
@@ -83120,7 +83120,7 @@ static goto_t do_end_code(s7_scheme *sc)
   if (is_pair(cdr(sc->code)))
     {
       if (is_undefined_feed_to(sc, car(sc->code)))
-	return(goto_feed_to);
+        return(goto_feed_to);
       /* never has_fx(sc->code) here (first of a body) */
       push_stack_no_args(sc, sc->begin_op, cdr(sc->code));
       sc->code = car(sc->code);
@@ -83156,25 +83156,25 @@ static bool opt_do_copy(s7_scheme *sc, opt_info *o, s7_int start, s7_int stop)
       s7_pointer dest = slot_value(o->v[1].p);
       s7_pointer source = slot_value(o->v[3].p);
       if ((is_t_vector(dest)) &&
-	  (((o->v[5].p_pip_f == vector_set_p_pip_unchecked) || (o->v[5].p_pip_f == t_vector_set_p_pip_direct)) &&
-	   ((o->v[6].p_pi_f == t_vector_ref_p_pi_unchecked) || (o->v[6].p_pi_f == vector_ref_p_pi_unchecked) || (o->v[6].p_pi_f == t_vector_ref_p_pi_direct))))
-	caller = sc->vector_set_symbol;
+          (((o->v[5].p_pip_f == vector_set_p_pip_unchecked) || (o->v[5].p_pip_f == t_vector_set_p_pip_direct)) &&
+           ((o->v[6].p_pi_f == t_vector_ref_p_pi_unchecked) || (o->v[6].p_pi_f == vector_ref_p_pi_unchecked) || (o->v[6].p_pi_f == t_vector_ref_p_pi_direct))))
+        caller = sc->vector_set_symbol;
       else
-	if ((is_string(dest)) &&
-	    (((o->v[5].p_pip_f == string_set_p_pip_unchecked) || (o->v[5].p_pip_f == string_set_p_pip_direct)) &&
-	     ((o->v[6].p_pi_f == string_ref_p_pi_unchecked) || (o->v[6].p_pi_f == string_ref_p_pi_direct))))
-	  caller = sc->string_set_symbol;
-	else
-	  if ((is_pair(dest)) &&
-	      ((o->v[5].p_pip_f == list_set_p_pip_unchecked) && (o->v[6].p_pi_f == list_ref_p_pi_unchecked)))
-	    caller = sc->list_set_symbol;
-	  else return(false);
+        if ((is_string(dest)) &&
+            (((o->v[5].p_pip_f == string_set_p_pip_unchecked) || (o->v[5].p_pip_f == string_set_p_pip_direct)) &&
+             ((o->v[6].p_pi_f == string_ref_p_pi_unchecked) || (o->v[6].p_pi_f == string_ref_p_pi_direct))))
+          caller = sc->string_set_symbol;
+        else
+          if ((is_pair(dest)) &&
+              ((o->v[5].p_pip_f == list_set_p_pip_unchecked) && (o->v[6].p_pi_f == list_ref_p_pi_unchecked)))
+            caller = sc->list_set_symbol;
+          else return(false);
       if (start < 0)
-	out_of_range_error_nr(sc, caller, wrap_integer(sc, 2), wrap_integer(sc, start), it_is_negative_string);
+        out_of_range_error_nr(sc, caller, wrap_integer(sc, 2), wrap_integer(sc, start), it_is_negative_string);
       if ((stop > integer(s7_length(sc, source))) || (stop > integer(s7_length(sc, dest))))
-	out_of_range_error_nr(sc, caller, wrap_integer(sc, 2), wrap_integer(sc, stop), it_is_too_large_string);
+        out_of_range_error_nr(sc, caller, wrap_integer(sc, 2), wrap_integer(sc, stop), it_is_too_large_string);
       if ((caller) && (copy_to_same_type(sc, dest, source, start, stop, start)))
-	return(true);
+        return(true);
     }
   return(false);
 }
@@ -83212,51 +83212,51 @@ static bool op_simple_do_1(s7_scheme *sc, s7_pointer code)
       s7_int stop = integer(slot_value(end_slot));
 
       if (func == opt_cell_any_nv)
-	{
-	  opt_info *o = sc->opts[0];
-	  s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-	  if ((fp == opt_p_ppp_sss) || (fp == opt_p_ppp_sss_mul) || (fp == opt_p_ppp_sss_hset))
-	    { /* (do ((i 0 (+ i 1))) ((= i 1) (let-ref lt 'a)) (let-set! lt sym i)) */
-	      s7_p_ppp_t fpt = o->v[4].p_ppp_f;
-	      for (i = start; i < stop; i++)  /* thash and below */
-		{
-		  slot_set_value(ctr_slot, make_integer(sc, i));
-		  fpt(sc, slot_value(o->v[1].p), slot_value(o->v[2].p), slot_value(o->v[3].p));
-		}}
-	  else
-	    if (fp == opt_p_ppp_sfs)
-	      { /* (do ((i 0 (+ i 1))) ((= i 9)) (vector-set! v4 (expt 2 i) i)) */
-		s7_p_ppp_t fpt = o->v[3].p_ppp_f;
-		for (i = start; i < stop; i++)
-		  {
-		    slot_set_value(ctr_slot, make_integer(sc, i));
-		    fpt(sc, slot_value(o->v[1].p), o->v[5].fp(o->v[4].o1), slot_value(o->v[2].p));
-		  }}
-	    else
-	      if ((fp == opt_p_pip_sss_vset) && (start >= 0) && (stop <= vector_length(slot_value(o->v[1].p))))
-		{ /* (do ((i 0 (+ i 1))) ((= i 10) v) (vector-set! v i i)) */
-		  s7_pointer *vels = vector_elements(slot_value(o->v[1].p)); /* better in callgrind, possibly slightly slower in time */
-		  check_free_heap_size(sc, stop - start);
-		  for (i = start; i < stop; i++)
-		    {
-		      slot_set_value(ctr_slot, make_integer_unchecked(sc, i));
-		      vels[integer(slot_value(o->v[2].p))] = slot_value(o->v[3].p);
-		    }}
-	      else /* (do ((i 0 (+ i 1))) ((= i 1) (let-ref lt 'a)) (let-set! lt 'a i)) or (do ((i 0 (+ i 1))) ((= i 10)) (list-set! lst i i)) */
-		for (i = start; i < stop; i++)
-		  {
-		    slot_set_value(ctr_slot, make_integer(sc, i));
-		    fp(o);
-		  }}
+        {
+          opt_info *o = sc->opts[0];
+          s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+          if ((fp == opt_p_ppp_sss) || (fp == opt_p_ppp_sss_mul) || (fp == opt_p_ppp_sss_hset))
+            { /* (do ((i 0 (+ i 1))) ((= i 1) (let-ref lt 'a)) (let-set! lt sym i)) */
+              s7_p_ppp_t fpt = o->v[4].p_ppp_f;
+              for (i = start; i < stop; i++)  /* thash and below */
+                {
+                  slot_set_value(ctr_slot, make_integer(sc, i));
+                  fpt(sc, slot_value(o->v[1].p), slot_value(o->v[2].p), slot_value(o->v[3].p));
+                }}
+          else
+            if (fp == opt_p_ppp_sfs)
+              { /* (do ((i 0 (+ i 1))) ((= i 9)) (vector-set! v4 (expt 2 i) i)) */
+                s7_p_ppp_t fpt = o->v[3].p_ppp_f;
+                for (i = start; i < stop; i++)
+                  {
+                    slot_set_value(ctr_slot, make_integer(sc, i));
+                    fpt(sc, slot_value(o->v[1].p), o->v[5].fp(o->v[4].o1), slot_value(o->v[2].p));
+                  }}
+            else
+              if ((fp == opt_p_pip_sss_vset) && (start >= 0) && (stop <= vector_length(slot_value(o->v[1].p))))
+                { /* (do ((i 0 (+ i 1))) ((= i 10) v) (vector-set! v i i)) */
+                  s7_pointer *vels = vector_elements(slot_value(o->v[1].p)); /* better in callgrind, possibly slightly slower in time */
+                  check_free_heap_size(sc, stop - start);
+                  for (i = start; i < stop; i++)
+                    {
+                      slot_set_value(ctr_slot, make_integer_unchecked(sc, i));
+                      vels[integer(slot_value(o->v[2].p))] = slot_value(o->v[3].p);
+                    }}
+              else /* (do ((i 0 (+ i 1))) ((= i 1) (let-ref lt 'a)) (let-set! lt 'a i)) or (do ((i 0 (+ i 1))) ((= i 10)) (list-set! lst i i)) */
+                for (i = start; i < stop; i++)
+                  {
+                    slot_set_value(ctr_slot, make_integer(sc, i));
+                    fp(o);
+                  }}
       else
-	{ /* (do ((j (+ nv k -1) (- j 1))) ((< j k)) (set! (r j) (- (r j) (* (q k) (p2 (- j k)))))) */
-	  /* (do ((__i__ 0 (+ __i__ 1))) ((= __i__ 1) 32.0) (b 0)) and many more, all wrap-int safe I think */
-	  /* splitting out opt_float_any_nv here saves almost nothing */
-	  for (i = start; i < stop; i++)
-	    {
-	      slot_set_value(ctr_slot, make_integer(sc, i));
-	      func(sc);
-	    }}
+        { /* (do ((j (+ nv k -1) (- j 1))) ((< j k)) (set! (r j) (- (r j) (* (q k) (p2 (- j k)))))) */
+          /* (do ((__i__ 0 (+ __i__ 1))) ((= __i__ 1) 32.0) (b 0)) and many more, all wrap-int safe I think */
+          /* splitting out opt_float_any_nv here saves almost nothing */
+          for (i = start; i < stop; i++)
+            {
+              slot_set_value(ctr_slot, make_integer(sc, i));
+              func(sc);
+            }}
       sc->value = sc->T;
       sc->code = cdadr(code);
       return(true);
@@ -83268,22 +83268,22 @@ static bool op_simple_do_1(s7_scheme *sc, s7_pointer code)
     {
       s7_int i, start = integer(slot_value(ctr_slot)), stop = integer(slot_value(end_slot));
       if (func == opt_cell_any_nv)
-	{
-	  opt_info *o = sc->opts[0];
-	  if (!opt_do_copy(sc, o, stop, start + 1))
-	    { /* (do ((i 9 (- i 1))) ((< i 0) v) (vector-set! v i i)) */
-	      s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-	      for (i = start; i >= stop; i--)
-		{
-		  slot_set_value(ctr_slot, make_integer(sc, i));
-		  fp(o);
-		}}}
+        {
+          opt_info *o = sc->opts[0];
+          if (!opt_do_copy(sc, o, stop, start + 1))
+            { /* (do ((i 9 (- i 1))) ((< i 0) v) (vector-set! v i i)) */
+              s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+              for (i = start; i >= stop; i--)
+                {
+                  slot_set_value(ctr_slot, make_integer(sc, i));
+                  fp(o);
+                }}}
       else /* (do ((i 9 (- i 1))) ((< i 0)) (set! (v i) (delay gen 0.5 i))) */
-	for (i = start; i >= stop; i--)
-	  {
-	    slot_set_value(ctr_slot, make_integer(sc, i));
-	    func(sc);
-	  }
+        for (i = start; i >= stop; i--)
+          {
+            slot_set_value(ctr_slot, make_integer(sc, i));
+            func(sc);
+          }
       sc->value = sc->T;
       sc->code = cdadr(code);
       return(true);
@@ -83295,21 +83295,21 @@ static bool op_simple_do_1(s7_scheme *sc, s7_pointer code)
     {
       s7_int i, start = integer(slot_value(ctr_slot)), stop = integer(slot_value(end_slot)), incr = integer(caddr(step_expr));
       if (func == opt_cell_any_nv)
-	{ /* (do ((i 0 (+ i 2))) ((= i 20)) (display (/ i 2))) */
-	  /* (do ((i 0 (+ i 8))) ((= i 64)) (write-byte (logand (ash int (- i)) 255))) */
-	  opt_info *o = sc->opts[0];
-	  s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-	  for (i = start; i < stop; i += incr)
-	    {
-	      slot_set_value(ctr_slot, make_integer(sc, i));
-	      fp(o);
-	    }}
+        { /* (do ((i 0 (+ i 2))) ((= i 20)) (display (/ i 2))) */
+          /* (do ((i 0 (+ i 8))) ((= i 64)) (write-byte (logand (ash int (- i)) 255))) */
+          opt_info *o = sc->opts[0];
+          s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+          for (i = start; i < stop; i += incr)
+            {
+              slot_set_value(ctr_slot, make_integer(sc, i));
+              fp(o);
+            }}
       else
-	for (i = start; i < stop; i += incr)
-	  {
-	    slot_set_value(ctr_slot, make_integer(sc, i));
-	    func(sc);
-	  }
+        for (i = start; i < stop; i += incr)
+          {
+            slot_set_value(ctr_slot, make_integer(sc, i));
+            func(sc);
+          }
       sc->value = sc->T;
       sc->code = cdadr(code);
       return(true);
@@ -83319,44 +83319,44 @@ static bool op_simple_do_1(s7_scheme *sc, s7_pointer code)
       opt_info *o = sc->opts[0];
       s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
       if ((stepf == g_add_x1) && (is_t_integer(slot_value(ctr_slot))) &&
-	  (endf == g_greater_2) && (is_t_integer(slot_value(end_slot))))
-	{
-	  s7_int start = integer(slot_value(ctr_slot));
-	  s7_int stop = integer(slot_value(end_slot));
-	  if (fp == opt_cond_1b)
-	    { /*  (do ((i 0 (+ i 1))) ((> i a)) (cond (i i))) ! */
-	      s7_pointer (*test_fp)(opt_info *o) = o->v[4].o1->v[O_WRAP].fp;
-	      opt_info *test_o1 = o->v[4].o1;
-	      opt_info *o2 = o->v[6].o1;
-	      for (s7_int i = start; i <= stop; i++)
-		{
-		  slot_set_value(ctr_slot, make_integer(sc, i));
-		  if (test_fp(test_o1) != sc->F) cond_value(o2);
-		}}
-	  else /* (do ((i 0 (+ i 1))) ((> i a)) (vector-set! v i 1)) */
-	    for (s7_int i = start; i <= stop; i++)
-	      {
-		slot_set_value(ctr_slot, make_integer(sc, i));
-		fp(o);
-	      }}
+          (endf == g_greater_2) && (is_t_integer(slot_value(end_slot))))
+        {
+          s7_int start = integer(slot_value(ctr_slot));
+          s7_int stop = integer(slot_value(end_slot));
+          if (fp == opt_cond_1b)
+            { /*  (do ((i 0 (+ i 1))) ((> i a)) (cond (i i))) ! */
+              s7_pointer (*test_fp)(opt_info *o) = o->v[4].o1->v[O_WRAP].fp;
+              opt_info *test_o1 = o->v[4].o1;
+              opt_info *o2 = o->v[6].o1;
+              for (s7_int i = start; i <= stop; i++)
+                {
+                  slot_set_value(ctr_slot, make_integer(sc, i));
+                  if (test_fp(test_o1) != sc->F) cond_value(o2);
+                }}
+          else /* (do ((i 0 (+ i 1))) ((> i a)) (vector-set! v i 1)) */
+            for (s7_int i = start; i <= stop; i++)
+              {
+                slot_set_value(ctr_slot, make_integer(sc, i));
+                fp(o);
+              }}
       else /*  (do ((i 0 (+ i 1))) ((> i 10)) (display i)) */
-	do {
-	  fp(o);
-	  set_car(sc->t2_1, slot_value(ctr_slot));
-	  set_car(sc->t2_2, step_var);
-	  slot_set_value(ctr_slot, stepf(sc, sc->t2_1));
-	  set_car(sc->t2_1, slot_value(ctr_slot));
-	  set_car(sc->t2_2, slot_value(end_slot));
-	} while ((sc->value = endf(sc, sc->t2_1)) == sc->F);
+        do {
+          fp(o);
+          set_car(sc->t2_1, slot_value(ctr_slot));
+          set_car(sc->t2_2, step_var);
+          slot_set_value(ctr_slot, stepf(sc, sc->t2_1));
+          set_car(sc->t2_1, slot_value(ctr_slot));
+          set_car(sc->t2_2, slot_value(end_slot));
+        } while ((sc->value = endf(sc, sc->t2_1)) == sc->F);
     }
   else /* (do ((i 0 (+ i 1))) ((> i 3) i) (set! i (* i 10))) */
     do {
-	func(sc);
-	set_car(sc->t2_1, slot_value(ctr_slot));
-	set_car(sc->t2_2, step_var);
-	slot_set_value(ctr_slot, stepf(sc, sc->t2_1));
-	set_car(sc->t2_1, slot_value(ctr_slot));
-	set_car(sc->t2_2, slot_value(end_slot));
+        func(sc);
+        set_car(sc->t2_1, slot_value(ctr_slot));
+        set_car(sc->t2_2, step_var);
+        slot_set_value(ctr_slot, stepf(sc, sc->t2_1));
+        set_car(sc->t2_1, slot_value(ctr_slot));
+        set_car(sc->t2_2, slot_value(end_slot));
       } while ((sc->value = endf(sc, sc->t2_1)) == sc->F);
   sc->code = cdadr(code);
   return(true);
@@ -83490,25 +83490,25 @@ static /* inline */ bool op_dotimes_step_o(s7_scheme *sc) /* called once in eval
       slot_set_value(ctr, make_integer(sc, integer(now) + 1));
       now = slot_value(ctr);
       if (is_t_integer(end))
-	{
-	  if ((integer(now) == integer(end)) ||
-	      ((integer(now) > integer(end)) && (opt1_cfunc(end_test) == sc->geq_2)))
-	    {
-	      sc->value = sc->T;
-	      sc->code = cdadr(code);
-	      return(true);
-	    }}
+        {
+          if ((integer(now) == integer(end)) ||
+              ((integer(now) > integer(end)) && (opt1_cfunc(end_test) == sc->geq_2)))
+            {
+              sc->value = sc->T;
+              sc->code = cdadr(code);
+              return(true);
+            }}
       else
-	{
-	  set_car(sc->t2_1, now);
-	  set_car(sc->t2_2, end);
-	  end = cadr(code);
-	  sc->value = fn_proc(car(end))(sc, sc->t2_1);
-	  if (is_true(sc, sc->value))
-	    {
-	      sc->code = cdr(end);
-	      return(true);
-	    }}}
+        {
+          set_car(sc->t2_1, now);
+          set_car(sc->t2_2, end);
+          end = cadr(code);
+          sc->value = fn_proc(car(end))(sc, sc->t2_1);
+          if (is_true(sc, sc->value))
+            {
+              sc->code = cdr(end);
+              return(true);
+            }}}
   else
     {
       slot_set_value(ctr, g_add_x1(sc, with_list_t1(now)));
@@ -83518,10 +83518,10 @@ static /* inline */ bool op_dotimes_step_o(s7_scheme *sc) /* called once in eval
       end = cadr(code);
       sc->value = fn_proc(car(end))(sc, sc->t2_1);
       if (is_true(sc, sc->value))
-	{
-	  sc->code = cdr(end);
-	  return(true);
-	}}
+        {
+          sc->code = cdr(end);
+          return(true);
+        }}
   push_stack_direct(sc, OP_DOTIMES_STEP_O);
   sc->code = caddr(code);
   return(false);
@@ -83540,187 +83540,187 @@ static bool opt_dotimes(s7_scheme *sc, s7_pointer code, s7_pointer scc, bool loo
       if (no_cell_opt(code)) return(false);
       func = s7_optimize_nv(sc, code);
       if (!func)
-	{
-	  set_no_cell_opt(code);
-	  return(false);
-	}
+        {
+          set_no_cell_opt(code);
+          return(false);
+        }
       if (loop_end_ok)
-	{
-	  s7_int end = loop_end(sc->args);
-	  s7_pointer stepper = make_mutable_integer(sc, integer(slot_value(sc->args)));
-	  slot_set_value(sc->args, stepper);
-	  if ((func == opt_float_any_nv) ||
-	      (func == opt_cell_any_nv))
-	    {
-	      opt_info *o = sc->opts[0];
-	      if (func == opt_float_any_nv)
-		{
-		  s7_double (*fd)(opt_info *o) = o->v[0].fd;
-		  if ((fd == opt_d_id_sf) && /* by far the most common case in clm: (outa i ...) etc */
-		      (is_slot(o->v[1].p)) &&
-		      (stepper == slot_value(o->v[1].p)))
-		    { /* (do ((i 0 (+ i 1))) ((= i len) (set! *output* #f) v1) (outa i (- (* i incr) 0.5))) */
-		      opt_info *o1 = sc->opts[1];
-		      s7_int end8 = end - 8;
-		      s7_d_id_t f0 = o->v[3].d_id_f;
-		      fd = o1->v[0].fd;
-		      while (integer(stepper) < end8)
-			LOOP_8(f0(integer(stepper), fd(o1)); integer(stepper)++);
-		      while (integer(stepper) < end)
-			{
-   			  f0(integer(stepper), fd(o1));
-			  integer(stepper)++;
-			}}
-		  else
-		    if ((o->v[0].fd == opt_d_7pid_ss_ss) && (o->v[4].d_7pid_f == float_vector_set_d_7pid_direct) &&
-			((o->v[3].d_7pi_f == float_vector_ref_d_7pi) || (o->v[3].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
-			(o->v[2].p == o->v[6].p))
-		      copy_to_same_type(sc, slot_value(o->v[1].p), slot_value(o->v[5].p), integer(stepper), end, integer(stepper));
-		    else
-		      if ((o->v[0].fd == opt_d_7pid_ssc) &&
-			  (o->v[4].d_7pid_f == float_vector_set_d_7pid_direct) &&
-			  (stepper == slot_value(o->v[2].p)))
-			s7_fill(sc, set_plist_4(sc, slot_value(o->v[1].p), wrap_real(sc, o->v[3].x), stepper, wrap_integer(sc, end))); /* wrapped 16-Nov-23 */
-		      else
-			{ /* (do ((i 0 (+ i 1))) ((= i 2) fv) (float-vector-set! fv (+ i 0) (+ i 1) (* 2.0 3.0))) */
-			  s7_int end4 = end - 4;
-			  while (integer(stepper) < end4)
-			    LOOP_4(fd(o); integer(stepper)++);
-			  for (; integer(stepper) < end; integer(stepper)++)
-			    fd(o);
-			}}
-	      else
-		{
-		  s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-		  if ((fp == opt_p_pip_ssc) &&
-		      (stepper == slot_value(o->v[2].p)) &&        /* i.e. index by do counter */
-		      ((o->v[3].p_pip_f == string_set_p_pip_direct) ||
-		       (o->v[3].p_pip_f == t_vector_set_p_pip_direct) ||
-		       (o->v[3].p_pip_f == list_set_p_pip_unchecked)))
-		    s7_fill(sc, set_plist_4(sc, slot_value(o->v[1].p), o->v[4].p, stepper, wrap_integer(sc, end)));  /* wrapped 16-Nov-23 */
-		  else
-		    if (fp == opt_if_bp)
-		      {      /* (do ((i 0 (+ i 1))) ((= i 3) y) (if (= (+ z 1) 2.2) (display (+ z 1)))) */
-			for (; integer(stepper) < end; integer(stepper)++)
-			  if (o->v[3].fb(o->v[2].o1)) o->v[5].fp(o->v[4].o1);
-		      }
-		    else
-		      if (fp == opt_if_nbp_fs)
-			{    /* (do ((i 0 (+ i 1))) ((= i len)) (if (not (= (list-ref lst i) i)) (display "oops"))) */
-			  for (; integer(stepper) < end; integer(stepper)++)
-			    if (!(o->v[2].b_pi_f(sc, o->v[5].fp(o->v[4].o1), integer(slot_value(o->v[3].p))))) o->v[11].fp(o->v[10].o1);
-			}
-		      else
-			if (fp == opt_unless_p_1)
-			  {  /* (do ((i 0 (+ i 1))) ((= i size)) (unless (= (hash-table-ref vct-hash (float-vector i)) i) (display "oops"))) */
-			    for (; integer(stepper) < end; integer(stepper)++)
-			      if (!(o->v[4].fb(o->v[3].o1))) o->v[5].o1->v[0].fp(o->v[5].o1);
-			  }
-			else /* (do ((i 0 (+ i 1))) ((= i size) (vector-ref v 0)) (vector-set! v i 2)) */
-			  for (; integer(stepper) < end; integer(stepper)++) fp(o);
-		}}
-	  else
-	    if (func == opt_int_any_nv)
-	      {
-		opt_info *o = sc->opts[0];
-		s7_int (*fi)(opt_info *o) = o->v[0].fi;
-		if ((fi == opt_i_7pii_ssc) && (stepper == slot_value(o->v[2].p)) && (o->v[3].i_7pii_f == int_vector_set_i_7pii_direct))
-		  s7_fill(sc, set_plist_4(sc, slot_value(o->v[1].p), wrap_integer(sc, o->v[4].i), stepper, wrap_integer(sc, end)));  /* wrapped 16-Nov-23 */
-		else
-		  if ((o->v[3].i_7pii_f == int_vector_set_i_7pii_direct) && (o->v[5].fi == opt_i_pi_ss_ivref) && (o->v[2].p == o->v[4].o1->v[2].p))
-		    copy_to_same_type(sc, slot_value(o->v[1].p), slot_value(o->v[4].o1->v[1].p), integer(stepper), end, integer(stepper));
-		  else /* (do ((i 0 (+ i 1))) ((= i size) (byte-vector-ref v 0)) (byte-vector-set! v i 2)) */
-		    for (; integer(stepper) < end; integer(stepper)++)
-		      fi(o);
-	      }
-	    else /* (do ((i 0 (+ i 1))) ((= i 1)) (char-alphabetic? (string-ref #u(0 1) 1))) or (logbit? i -1): kinda nutty */
-	      for (; integer(stepper) < end; integer(stepper)++)
-		func(sc);
-	  clear_mutable_integer(stepper);
-	}
+        {
+          s7_int end = loop_end(sc->args);
+          s7_pointer stepper = make_mutable_integer(sc, integer(slot_value(sc->args)));
+          slot_set_value(sc->args, stepper);
+          if ((func == opt_float_any_nv) ||
+              (func == opt_cell_any_nv))
+            {
+              opt_info *o = sc->opts[0];
+              if (func == opt_float_any_nv)
+                {
+                  s7_double (*fd)(opt_info *o) = o->v[0].fd;
+                  if ((fd == opt_d_id_sf) && /* by far the most common case in clm: (outa i ...) etc */
+                      (is_slot(o->v[1].p)) &&
+                      (stepper == slot_value(o->v[1].p)))
+                    { /* (do ((i 0 (+ i 1))) ((= i len) (set! *output* #f) v1) (outa i (- (* i incr) 0.5))) */
+                      opt_info *o1 = sc->opts[1];
+                      s7_int end8 = end - 8;
+                      s7_d_id_t f0 = o->v[3].d_id_f;
+                      fd = o1->v[0].fd;
+                      while (integer(stepper) < end8)
+                        LOOP_8(f0(integer(stepper), fd(o1)); integer(stepper)++);
+                      while (integer(stepper) < end)
+                        {
+                             f0(integer(stepper), fd(o1));
+                          integer(stepper)++;
+                        }}
+                  else
+                    if ((o->v[0].fd == opt_d_7pid_ss_ss) && (o->v[4].d_7pid_f == float_vector_set_d_7pid_direct) &&
+                        ((o->v[3].d_7pi_f == float_vector_ref_d_7pi) || (o->v[3].d_7pi_f == float_vector_ref_d_7pi_direct)) &&
+                        (o->v[2].p == o->v[6].p))
+                      copy_to_same_type(sc, slot_value(o->v[1].p), slot_value(o->v[5].p), integer(stepper), end, integer(stepper));
+                    else
+                      if ((o->v[0].fd == opt_d_7pid_ssc) &&
+                          (o->v[4].d_7pid_f == float_vector_set_d_7pid_direct) &&
+                          (stepper == slot_value(o->v[2].p)))
+                        s7_fill(sc, set_plist_4(sc, slot_value(o->v[1].p), wrap_real(sc, o->v[3].x), stepper, wrap_integer(sc, end))); /* wrapped 16-Nov-23 */
+                      else
+                        { /* (do ((i 0 (+ i 1))) ((= i 2) fv) (float-vector-set! fv (+ i 0) (+ i 1) (* 2.0 3.0))) */
+                          s7_int end4 = end - 4;
+                          while (integer(stepper) < end4)
+                            LOOP_4(fd(o); integer(stepper)++);
+                          for (; integer(stepper) < end; integer(stepper)++)
+                            fd(o);
+                        }}
+              else
+                {
+                  s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+                  if ((fp == opt_p_pip_ssc) &&
+                      (stepper == slot_value(o->v[2].p)) &&        /* i.e. index by do counter */
+                      ((o->v[3].p_pip_f == string_set_p_pip_direct) ||
+                       (o->v[3].p_pip_f == t_vector_set_p_pip_direct) ||
+                       (o->v[3].p_pip_f == list_set_p_pip_unchecked)))
+                    s7_fill(sc, set_plist_4(sc, slot_value(o->v[1].p), o->v[4].p, stepper, wrap_integer(sc, end)));  /* wrapped 16-Nov-23 */
+                  else
+                    if (fp == opt_if_bp)
+                      {      /* (do ((i 0 (+ i 1))) ((= i 3) y) (if (= (+ z 1) 2.2) (display (+ z 1)))) */
+                        for (; integer(stepper) < end; integer(stepper)++)
+                          if (o->v[3].fb(o->v[2].o1)) o->v[5].fp(o->v[4].o1);
+                      }
+                    else
+                      if (fp == opt_if_nbp_fs)
+                        {    /* (do ((i 0 (+ i 1))) ((= i len)) (if (not (= (list-ref lst i) i)) (display "oops"))) */
+                          for (; integer(stepper) < end; integer(stepper)++)
+                            if (!(o->v[2].b_pi_f(sc, o->v[5].fp(o->v[4].o1), integer(slot_value(o->v[3].p))))) o->v[11].fp(o->v[10].o1);
+                        }
+                      else
+                        if (fp == opt_unless_p_1)
+                          {  /* (do ((i 0 (+ i 1))) ((= i size)) (unless (= (hash-table-ref vct-hash (float-vector i)) i) (display "oops"))) */
+                            for (; integer(stepper) < end; integer(stepper)++)
+                              if (!(o->v[4].fb(o->v[3].o1))) o->v[5].o1->v[0].fp(o->v[5].o1);
+                          }
+                        else /* (do ((i 0 (+ i 1))) ((= i size) (vector-ref v 0)) (vector-set! v i 2)) */
+                          for (; integer(stepper) < end; integer(stepper)++) fp(o);
+                }}
+          else
+            if (func == opt_int_any_nv)
+              {
+                opt_info *o = sc->opts[0];
+                s7_int (*fi)(opt_info *o) = o->v[0].fi;
+                if ((fi == opt_i_7pii_ssc) && (stepper == slot_value(o->v[2].p)) && (o->v[3].i_7pii_f == int_vector_set_i_7pii_direct))
+                  s7_fill(sc, set_plist_4(sc, slot_value(o->v[1].p), wrap_integer(sc, o->v[4].i), stepper, wrap_integer(sc, end)));  /* wrapped 16-Nov-23 */
+                else
+                  if ((o->v[3].i_7pii_f == int_vector_set_i_7pii_direct) && (o->v[5].fi == opt_i_pi_ss_ivref) && (o->v[2].p == o->v[4].o1->v[2].p))
+                    copy_to_same_type(sc, slot_value(o->v[1].p), slot_value(o->v[4].o1->v[1].p), integer(stepper), end, integer(stepper));
+                  else /* (do ((i 0 (+ i 1))) ((= i size) (byte-vector-ref v 0)) (byte-vector-set! v i 2)) */
+                    for (; integer(stepper) < end; integer(stepper)++)
+                      fi(o);
+              }
+            else /* (do ((i 0 (+ i 1))) ((= i 1)) (char-alphabetic? (string-ref #u(0 1) 1))) or (logbit? i -1): kinda nutty */
+              for (; integer(stepper) < end; integer(stepper)++)
+                func(sc);
+          clear_mutable_integer(stepper);
+        }
       else
-	{
-	  s7_pointer step_slot = let_dox_slot1(sc->curlet);
-	  s7_pointer end_slot = let_dox_slot2(sc->curlet);
-	  s7_int step = integer(slot_value(step_slot));
-	  s7_int stop = integer(slot_value(end_slot));
-	  step_val = slot_value(step_slot);
-
-	  if (func == opt_cell_any_nv)
-	    {
-	      opt_info *o = sc->opts[0];
-	      s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
-	      if (!opt_do_copy(sc, o, step, stop))
-		{
-		  if ((step >= 0) && (stop < NUM_SMALL_INTS))
-		    {
-		      if (fp == opt_when_p_2)
-			{ /* (do ((i 0 (+ i 1))) ((= i len) (list mx loc)) (when (> (abs (vect i)) mx) (set! mx (vect i)) (set! loc i))) */
-			  for (; step < stop; step++)
-			    {
-			      slot_set_value(step_slot, small_int(step));
-			      if (o->v[4].fb(o->v[3].o1))
-				{
-				  o->v[6].fp(o->v[5].o1);
-				  o->v[8].fp(o->v[7].o1);
-				}}}
-		      else /* (do ((k 0 (+ k 1))) ((= k 10) sum) (do ((i 0 (+ i 1))) ((= i size/10)) (set! sum (+ sum (round (vector-ref v k i)))))) */
-			for (; step < stop; step++)
-			  {
-			    slot_set_value(step_slot, small_int(step));
-			    fp(o);
-			  }}
-		  else /* (do ((i 0 (+ i 1))) ((= i len) (list mx loc)) (when (> (abs (vect i)) mx) (set! mx (vect i)) (set! loc i))) */
-		    for (; step < stop; step++)
-		      {
-			slot_set_value(step_slot, make_integer(sc, step));
-			fp(o);
-		      }}}
-	  else
-	    if ((step >= 0) && (stop < NUM_SMALL_INTS))
-	      {	/* (do ((i 0 (+ i 1))) ((= i 1) x) (set! x (+ (* x1 (block-ref b1 i)) (* x2 (block-ref b2 j))))) */
-		for (; step < stop; step++)
-		  {
-		    slot_set_value(step_slot, small_int(step));
-		    func(sc);
-		  }}
-	    else
-	      if (func == opt_int_any_nv)
-		{ /* (do ((i 0 (+ i 1))) ((= i size) sum) (set! sum (+ sum (floor (vector-ref v i))))) */
-		  opt_info *o = sc->opts[0];
-		  s7_int (*fi)(opt_info *o) = o->v[0].fi;
-		  if ((fi == opt_set_i_i_f) || (fi == opt_set_i_i_fo))
-		    {
-		      slot_set_value(o->v[1].p, make_mutable_integer(sc, integer(slot_value(o->v[1].p))));
-		      fi = (fi == opt_set_i_i_f) ? opt_set_i_i_fm : opt_set_i_i_fom;
-		    }
-		  while (step < stop)
-		    {
-		      fi(o);
-		      step = ++integer(step_val);
-		    }
-		  if ((fi == opt_set_i_i_fm) || (fi == opt_set_i_i_fom))
-		    clear_mutable_integer(slot_value(o->v[1].p));
-		}
-	      else
-		if (func == opt_float_any_nv)
-		  { /* (do ((i 1 (+ i 1))) ((= i 1000)) (set! (v i) (filter f1 0.0))) */
-		    opt_info *o = sc->opts[0];
-		    s7_double (*fd)(opt_info *o) = o->v[0].fd;
-		    if (fd == opt_set_d_d_f)
-		      { /* (do ((i 0 (+ i 1))) ((= i 32768)) (set! sum (+ sum (float-vector-ref ndat i)))) */
-			slot_set_value(o->v[1].p, make_mutable_real(sc, real(slot_value(o->v[1].p))));
-			fd = opt_set_d_d_fm;
-		      }
-		    while (step < stop)
-		      {
-			fd(o);
-			step = ++integer(step_val);
-		      }
-		    if (fd == opt_set_d_d_fm)
-		      clear_mutable_number(slot_value(o->v[1].p));
-		  }}
-	        /* there aren't any other possibilities */
+        {
+          s7_pointer step_slot = let_dox_slot1(sc->curlet);
+          s7_pointer end_slot = let_dox_slot2(sc->curlet);
+          s7_int step = integer(slot_value(step_slot));
+          s7_int stop = integer(slot_value(end_slot));
+          step_val = slot_value(step_slot);
+
+          if (func == opt_cell_any_nv)
+            {
+              opt_info *o = sc->opts[0];
+              s7_pointer (*fp)(opt_info *o) = o->v[0].fp;
+              if (!opt_do_copy(sc, o, step, stop))
+                {
+                  if ((step >= 0) && (stop < NUM_SMALL_INTS))
+                    {
+                      if (fp == opt_when_p_2)
+                        { /* (do ((i 0 (+ i 1))) ((= i len) (list mx loc)) (when (> (abs (vect i)) mx) (set! mx (vect i)) (set! loc i))) */
+                          for (; step < stop; step++)
+                            {
+                              slot_set_value(step_slot, small_int(step));
+                              if (o->v[4].fb(o->v[3].o1))
+                                {
+                                  o->v[6].fp(o->v[5].o1);
+                                  o->v[8].fp(o->v[7].o1);
+                                }}}
+                      else /* (do ((k 0 (+ k 1))) ((= k 10) sum) (do ((i 0 (+ i 1))) ((= i size/10)) (set! sum (+ sum (round (vector-ref v k i)))))) */
+                        for (; step < stop; step++)
+                          {
+                            slot_set_value(step_slot, small_int(step));
+                            fp(o);
+                          }}
+                  else /* (do ((i 0 (+ i 1))) ((= i len) (list mx loc)) (when (> (abs (vect i)) mx) (set! mx (vect i)) (set! loc i))) */
+                    for (; step < stop; step++)
+                      {
+                        slot_set_value(step_slot, make_integer(sc, step));
+                        fp(o);
+                      }}}
+          else
+            if ((step >= 0) && (stop < NUM_SMALL_INTS))
+              {        /* (do ((i 0 (+ i 1))) ((= i 1) x) (set! x (+ (* x1 (block-ref b1 i)) (* x2 (block-ref b2 j))))) */
+                for (; step < stop; step++)
+                  {
+                    slot_set_value(step_slot, small_int(step));
+                    func(sc);
+                  }}
+            else
+              if (func == opt_int_any_nv)
+                { /* (do ((i 0 (+ i 1))) ((= i size) sum) (set! sum (+ sum (floor (vector-ref v i))))) */
+                  opt_info *o = sc->opts[0];
+                  s7_int (*fi)(opt_info *o) = o->v[0].fi;
+                  if ((fi == opt_set_i_i_f) || (fi == opt_set_i_i_fo))
+                    {
+                      slot_set_value(o->v[1].p, make_mutable_integer(sc, integer(slot_value(o->v[1].p))));
+                      fi = (fi == opt_set_i_i_f) ? opt_set_i_i_fm : opt_set_i_i_fom;
+                    }
+                  while (step < stop)
+                    {
+                      fi(o);
+                      step = ++integer(step_val);
+                    }
+                  if ((fi == opt_set_i_i_fm) || (fi == opt_set_i_i_fom))
+                    clear_mutable_integer(slot_value(o->v[1].p));
+                }
+              else
+                if (func == opt_float_any_nv)
+                  { /* (do ((i 1 (+ i 1))) ((= i 1000)) (set! (v i) (filter f1 0.0))) */
+                    opt_info *o = sc->opts[0];
+                    s7_double (*fd)(opt_info *o) = o->v[0].fd;
+                    if (fd == opt_set_d_d_f)
+                      { /* (do ((i 0 (+ i 1))) ((= i 32768)) (set! sum (+ sum (float-vector-ref ndat i)))) */
+                        slot_set_value(o->v[1].p, make_mutable_real(sc, real(slot_value(o->v[1].p))));
+                        fd = opt_set_d_d_fm;
+                      }
+                    while (step < stop)
+                      {
+                        fd(o);
+                        step = ++integer(step_val);
+                      }
+                    if (fd == opt_set_d_d_fm)
+                      clear_mutable_number(slot_value(o->v[1].p));
+                  }}
+                /* there aren't any other possibilities */
       sc->value = sc->T;
       sc->code = cdadr(scc);
       return(true);
@@ -83737,86 +83737,86 @@ static bool opt_dotimes(s7_scheme *sc, s7_pointer code, s7_pointer scc, bool loo
 
     if (!no_float_opt(code))
       {
-	for (k = 0, p = code; is_pair(p); k++, p = cdr(p))
-	  {
-	    body[k] = sc->opts[sc->pc];
-	    if (!float_optimize(sc, p))
-	      break;
-	    /* if opt_set_d_d_f -> fm mutablizing body[k]->v[1].p? see 83033 but protect against (data i) as below */
-	  }
-	if (is_pair(p))
-	  {
-	    sc->pc = 0;
-	    set_no_float_opt(code);
-	  }
-	else
-	  {
-	    if (loop_end_ok)
-	      { /* (do ((i start (+ i 1))) ((= i end)) (outa i (* ampa (ina i *reverb*))) (outb i (* ampb (inb i *reverb*)))) */
-		s7_int end = loop_end(sc->args);
-		s7_pointer stepper = make_mutable_integer(sc, integer(slot_value(sc->args)));
-		slot_set_value(sc->args, stepper);
-		for (; integer(stepper) < end; integer(stepper)++)
-		  for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fd(body[i]);
-		clear_mutable_integer(stepper);
-	      }
-	    else
-	      { /* (do ((i 0 (+ i 1))) ((= i 5)) (set! (data i) (delay dly1 impulse -0.4)) (set! impulse 0.0)) */
-		s7_pointer step_slot = let_dox_slot1(sc->curlet);
-		s7_pointer end_slot = let_dox_slot2(sc->curlet);
-		s7_int stop = integer(slot_value(end_slot));
-		step_val = slot_value(step_slot);
-		for (s7_int step = integer(step_val); step < stop; step = ++integer(step_val))
-		  for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fd(body[i]);
-		/* tari[99 ff]: 4 calls here all safe (see d_syntax_ok, need to make the change and the list here dependent on two-sets bit(?) (3.3M calls) */
-		/* tall: (3.3M calls) */
-	      }
-	    sc->value = sc->T;
-	    sc->code = cdadr(scc);
-	    return(true);
-	  }}
+        for (k = 0, p = code; is_pair(p); k++, p = cdr(p))
+          {
+            body[k] = sc->opts[sc->pc];
+            if (!float_optimize(sc, p))
+              break;
+            /* if opt_set_d_d_f -> fm mutablizing body[k]->v[1].p? see 83033 but protect against (data i) as below */
+          }
+        if (is_pair(p))
+          {
+            sc->pc = 0;
+            set_no_float_opt(code);
+          }
+        else
+          {
+            if (loop_end_ok)
+              { /* (do ((i start (+ i 1))) ((= i end)) (outa i (* ampa (ina i *reverb*))) (outb i (* ampb (inb i *reverb*)))) */
+                s7_int end = loop_end(sc->args);
+                s7_pointer stepper = make_mutable_integer(sc, integer(slot_value(sc->args)));
+                slot_set_value(sc->args, stepper);
+                for (; integer(stepper) < end; integer(stepper)++)
+                  for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fd(body[i]);
+                clear_mutable_integer(stepper);
+              }
+            else
+              { /* (do ((i 0 (+ i 1))) ((= i 5)) (set! (data i) (delay dly1 impulse -0.4)) (set! impulse 0.0)) */
+                s7_pointer step_slot = let_dox_slot1(sc->curlet);
+                s7_pointer end_slot = let_dox_slot2(sc->curlet);
+                s7_int stop = integer(slot_value(end_slot));
+                step_val = slot_value(step_slot);
+                for (s7_int step = integer(step_val); step < stop; step = ++integer(step_val))
+                  for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fd(body[i]);
+                /* tari[99 ff]: 4 calls here all safe (see d_syntax_ok, need to make the change and the list here dependent on two-sets bit(?) (3.3M calls) */
+                /* tall: (3.3M calls) */
+              }
+            sc->value = sc->T;
+            sc->code = cdadr(scc);
+            return(true);
+          }}
 
     /* not float opt */
     sc->pc = 0;
     for (k = 0, p = code; is_pair(p); k++, p = cdr(p))
       {
-	opt_info *start = sc->opts[sc->pc];
-	if (!cell_optimize(sc, p))
-	  break;
-	oo_idp_nr_fixup(start);
-	body[k] = start;
+        opt_info *start = sc->opts[sc->pc];
+        if (!cell_optimize(sc, p))
+          break;
+        oo_idp_nr_fixup(start);
+        body[k] = start;
       }
 
     if (is_null(p))
       {
-	if ((S7_DEBUGGING) && (loop_end_ok) && (!has_loop_end(sc->args))) fprintf(stderr, "%s[%d]: loop_end_ok but not has_loop_end\n", __func__, __LINE__);
-	if (loop_end_ok)
-	  { /* (do ((i 0 (+ i 1))) ((= i 1) strs) (copy (vector-ref strs i) (make-string 1)) (copy (vector-ref strs i) (make-string 0))) */
-	    s7_int end = loop_end(sc->args);
-	    s7_pointer stepper = make_mutable_integer(sc, integer(slot_value(sc->args)));
-	    slot_set_value(sc->args, stepper);
-	    if ((body_len & 0x3) == 0)
-	      for (; integer(stepper) < end; integer(stepper)++)
-		for (int32_t i = 0; i < body_len; )
-		  LOOP_4(body[i]->v[0].fp(body[i]); i++);
-	    else
-	      for (; integer(stepper) < end; integer(stepper)++)
-		for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fp(body[i]);
-	    clear_mutable_integer(stepper);
-	  }
-	else
-	  { /* (do ((k j (+ k 1))) ((= k len2) obj) (set! (obj n) (seq2 k)) (set! n (+ n 1))) */
-	    s7_pointer step_slot = let_dox_slot1(sc->curlet);
-	    s7_pointer end_slot = let_dox_slot2(sc->curlet);
-	    s7_int stop = integer(slot_value(end_slot));
-	    for (s7_int step = integer(slot_value(step_slot)); step < stop; step++)
-	      {
-		slot_set_value(step_slot, make_integer(sc, step));
-		for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fp(body[i]);
-	      }}
-	sc->value = sc->T;
-	sc->code = cdadr(scc);
-	return(true);
+        if ((S7_DEBUGGING) && (loop_end_ok) && (!has_loop_end(sc->args))) fprintf(stderr, "%s[%d]: loop_end_ok but not has_loop_end\n", __func__, __LINE__);
+        if (loop_end_ok)
+          { /* (do ((i 0 (+ i 1))) ((= i 1) strs) (copy (vector-ref strs i) (make-string 1)) (copy (vector-ref strs i) (make-string 0))) */
+            s7_int end = loop_end(sc->args);
+            s7_pointer stepper = make_mutable_integer(sc, integer(slot_value(sc->args)));
+            slot_set_value(sc->args, stepper);
+            if ((body_len & 0x3) == 0)
+              for (; integer(stepper) < end; integer(stepper)++)
+                for (int32_t i = 0; i < body_len; )
+                  LOOP_4(body[i]->v[0].fp(body[i]); i++);
+            else
+              for (; integer(stepper) < end; integer(stepper)++)
+                for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fp(body[i]);
+            clear_mutable_integer(stepper);
+          }
+        else
+          { /* (do ((k j (+ k 1))) ((= k len2) obj) (set! (obj n) (seq2 k)) (set! n (+ n 1))) */
+            s7_pointer step_slot = let_dox_slot1(sc->curlet);
+            s7_pointer end_slot = let_dox_slot2(sc->curlet);
+            s7_int stop = integer(slot_value(end_slot));
+            for (s7_int step = integer(slot_value(step_slot)); step < stop; step++)
+              {
+                slot_set_value(step_slot, make_integer(sc, step));
+                for (int32_t i = 0; i < body_len; i++) body[i]->v[0].fp(body[i]);
+              }}
+        sc->value = sc->T;
+        sc->code = cdadr(scc);
+        return(true);
       }}
   return(false);
 }
@@ -83849,17 +83849,17 @@ static bool do_let(s7_scheme *sc, s7_pointer step_slot, s7_pointer scc)
   for (var_len = 0, p = let_vars; (is_pair(p)) && (var_len < 32); var_len++, p = cdr(p))
     {
       if ((!is_pair(car(p))) ||
-	  (!is_normal_symbol(caar(p))) ||
-	  (!is_pair(cdar(p))))
-	return(false);
+          (!is_normal_symbol(caar(p))) ||
+          (!is_pair(cdar(p))))
+        return(false);
       vars[var_len] = sc->opts[sc->pc];
       if (!float_optimize(sc, cdar(p)))   /* each of these needs to set the associated variable */
-	{
-	  set_curlet(sc, old_e);
-	  return(false);
-	}
+        {
+          set_curlet(sc, old_e);
+          return(false);
+        }
       if (let_star)
-	add_slot_checked(sc, sc->curlet, caar(p), make_mutable_real(sc, 1.5));
+        add_slot_checked(sc, sc->curlet, caar(p), make_mutable_real(sc, 1.5));
     }
 
   if (!let_star)
@@ -83870,10 +83870,10 @@ static bool do_let(s7_scheme *sc, s7_pointer step_slot, s7_pointer scc)
     {
       body[k] = sc->opts[sc->pc];
       if (!float_optimize(sc, p))
-	{
-	  set_curlet(sc, old_e);
-	  return(false);
-	}}
+        {
+          set_curlet(sc, old_e);
+          return(false);
+        }}
   if (!is_null(p)) /* no hits in s7test or snd-test */
     {
       set_curlet(sc, old_e);
@@ -83886,92 +83886,92 @@ static bool do_let(s7_scheme *sc, s7_pointer step_slot, s7_pointer scc)
   if (body_len == 1)
     {
       if (var_len == 1)
-	{
-	  opt_info *first = sc->opts[0];
-	  opt_info *o = body[0];
-	  s7_pointer xp = t_lookup(sc, caar(let_vars), let_vars);
-	  s7_double (*f1)(opt_info *o) = first->v[0].fd;
-	  s7_double (*f2)(opt_info *o) = o->v[0].fd;
-	  set_integer(ip, numerator(stepper));
-	  set_real(xp, f1(first));
-	  f2(o);
-	  if ((f2 == opt_fmv) &&
-	      (f1 == opt_d_dd_ff_o2) &&
-	      (first->v[3].d_dd_f == add_d_dd) &&
-	      (slot_symbol(step_slot) == slot_symbol(o->v[2].p)))
-	    {
-	      opt_info *o1 = o->v[12].o1;
-	      opt_info *o2 = o->v[13].o1;
-	      opt_info *o3 = o->v[14].o1;
-	      s7_d_vid_t vf7 = o->v[4].d_vid_f;
-	      s7_d_v_t vf1 = first->v[4].d_v_f;
-	      s7_d_v_t vf2 = first->v[5].d_v_f;
-	      s7_d_v_t vf3 = o1->v[2].d_v_f;
-	      s7_d_v_t vf4 = o3->v[5].d_v_f;
-	      s7_d_vd_t vf5 = o2->v[3].d_vd_f;
-	      s7_d_vd_t vf6 = o3->v[6].d_vd_f;
-	      void *obj1 = first->v[1].obj;
-	      void *obj2 = first->v[2].obj;
-	      void *obj3 = o1->v[1].obj;
-	      void *obj4 = o3->v[1].obj;
-	      void *obj5 = o->v[5].obj;
-	      void *obj6 = o2->v[5].obj;
-	      void *obj7 = o3->v[2].obj;
-	      for (k = numerator(stepper) + 1; k < end; k++)
-		{
-		  s7_double vib = vf1(obj1) + vf2(obj2);
-		  s7_double amp_env = vf3(obj3);
-		  vf7(obj5, k, amp_env * vf5(obj6, vib + (vf4(obj4) * vf6(obj7, vib))));
-		}}
-	  else
-	    for (k = numerator(stepper) + 1; k < end; k++)
-	      {
-		set_integer(ip, k);
-		set_real(xp, f1(first));
-		f2(o);
-	      }} /* body_len == 1 and var_len == 1 */
+        {
+          opt_info *first = sc->opts[0];
+          opt_info *o = body[0];
+          s7_pointer xp = t_lookup(sc, caar(let_vars), let_vars);
+          s7_double (*f1)(opt_info *o) = first->v[0].fd;
+          s7_double (*f2)(opt_info *o) = o->v[0].fd;
+          set_integer(ip, numerator(stepper));
+          set_real(xp, f1(first));
+          f2(o);
+          if ((f2 == opt_fmv) &&
+              (f1 == opt_d_dd_ff_o2) &&
+              (first->v[3].d_dd_f == add_d_dd) &&
+              (slot_symbol(step_slot) == slot_symbol(o->v[2].p)))
+            {
+              opt_info *o1 = o->v[12].o1;
+              opt_info *o2 = o->v[13].o1;
+              opt_info *o3 = o->v[14].o1;
+              s7_d_vid_t vf7 = o->v[4].d_vid_f;
+              s7_d_v_t vf1 = first->v[4].d_v_f;
+              s7_d_v_t vf2 = first->v[5].d_v_f;
+              s7_d_v_t vf3 = o1->v[2].d_v_f;
+              s7_d_v_t vf4 = o3->v[5].d_v_f;
+              s7_d_vd_t vf5 = o2->v[3].d_vd_f;
+              s7_d_vd_t vf6 = o3->v[6].d_vd_f;
+              void *obj1 = first->v[1].obj;
+              void *obj2 = first->v[2].obj;
+              void *obj3 = o1->v[1].obj;
+              void *obj4 = o3->v[1].obj;
+              void *obj5 = o->v[5].obj;
+              void *obj6 = o2->v[5].obj;
+              void *obj7 = o3->v[2].obj;
+              for (k = numerator(stepper) + 1; k < end; k++)
+                {
+                  s7_double vib = vf1(obj1) + vf2(obj2);
+                  s7_double amp_env = vf3(obj3);
+                  vf7(obj5, k, amp_env * vf5(obj6, vib + (vf4(obj4) * vf6(obj7, vib))));
+                }}
+          else
+            for (k = numerator(stepper) + 1; k < end; k++)
+              {
+                set_integer(ip, k);
+                set_real(xp, f1(first));
+                f2(o);
+              }} /* body_len == 1 and var_len == 1 */
       else
-	{
-	  if (var_len == 2)
-	    {
-	      s7_pointer s1 = let_slots(sc->curlet);
-	      s7_pointer s2 = next_slot(s1);
-	      for (k = numerator(stepper); k < end; k++)
-		{
-		  set_integer(ip, k);
-		  set_real(slot_value(s1), vars[0]->v[0].fd(vars[0]));
-		  set_real(slot_value(s2), vars[1]->v[0].fd(vars[1]));
-		  body[0]->v[0].fd(body[0]);
-		}} /* body_len == 1 and var_len == 2 */
-	  else
-	    for (k = numerator(stepper); k < end; k++)
-	      {
-		set_integer(ip, k);
-		p = let_slots(sc->curlet);
-		for (int32_t n = 0; tis_slot(p); n++, p = next_slot(p))
-		  set_real(slot_value(p), vars[n]->v[0].fd(vars[n]));
-		body[0]->v[0].fd(body[0]);
-	      }}} /* end body_len == 1 */
+        {
+          if (var_len == 2)
+            {
+              s7_pointer s1 = let_slots(sc->curlet);
+              s7_pointer s2 = next_slot(s1);
+              for (k = numerator(stepper); k < end; k++)
+                {
+                  set_integer(ip, k);
+                  set_real(slot_value(s1), vars[0]->v[0].fd(vars[0]));
+                  set_real(slot_value(s2), vars[1]->v[0].fd(vars[1]));
+                  body[0]->v[0].fd(body[0]);
+                }} /* body_len == 1 and var_len == 2 */
+          else
+            for (k = numerator(stepper); k < end; k++)
+              {
+                set_integer(ip, k);
+                p = let_slots(sc->curlet);
+                for (int32_t n = 0; tis_slot(p); n++, p = next_slot(p))
+                  set_real(slot_value(p), vars[n]->v[0].fd(vars[n]));
+                body[0]->v[0].fd(body[0]);
+              }}} /* end body_len == 1 */
   else
     if ((body_len == 2) && (var_len == 1))
       {
-	s7_pointer s1 = let_slots(sc->curlet);
-	for (k = numerator(stepper); k < end; k++)
-	  {
-	    set_integer(ip, k);
-	    set_real(slot_value(s1), vars[0]->v[0].fd(vars[0]));
-	    body[0]->v[0].fd(body[0]);
-	    body[1]->v[0].fd(body[1]);
-	  }}
+        s7_pointer s1 = let_slots(sc->curlet);
+        for (k = numerator(stepper); k < end; k++)
+          {
+            set_integer(ip, k);
+            set_real(slot_value(s1), vars[0]->v[0].fd(vars[0]));
+            body[0]->v[0].fd(body[0]);
+            body[1]->v[0].fd(body[1]);
+          }}
     else
       for (k = numerator(stepper); k < end; k++)
-	{
-	  int32_t i;
-	  set_integer(ip, k);
-	  for (i = 0, p = let_slots(sc->curlet); tis_slot(p); i++, p = next_slot(p))
-	    set_real(slot_value(p), vars[i]->v[0].fd(vars[i]));
-	  for (i = 0; i < body_len; i++) body[i]->v[0].fd(body[i]);
-	}
+        {
+          int32_t i;
+          set_integer(ip, k);
+          for (i = 0, p = let_slots(sc->curlet); tis_slot(p); i++, p = next_slot(p))
+            set_real(slot_value(p), vars[i]->v[0].fd(vars[i]));
+          for (i = 0; i < body_len; i++) body[i]->v[0].fd(body[i]);
+        }
   set_curlet(sc, old_e);
   sc->value = sc->T;
   sc->code = cdadr(scc);
@@ -84001,82 +84001,82 @@ static goto_t op_safe_dotimes(s7_scheme *sc)
       s7_pointer code = sc->code;
       s7_pointer end_val = caddr(end_expr);
       if (is_symbol(end_val))
-	end_val = lookup_checked(sc, end_val);
+        end_val = lookup_checked(sc, end_val);
 
       if (s7_is_integer(end_val))
-	{
-	  sc->code = cddr(code);
-	  set_curlet(sc, make_let(sc, sc->curlet));
-	  sc->args = add_slot_checked(sc, sc->curlet, caaar(code), make_mutable_integer(sc, s7_integer_clamped_if_gmp(sc, init_val)));
-	  set_loop_end(sc->args, s7_integer_clamped_if_gmp(sc, end_val));
-	  set_has_loop_end(sc->args);  /* safe_dotimes step is by 1 */
-
-	  /* (define (hi) (do ((i 1 (+ 1 i))) ((= i 1) i))) -- we need the let even if the loop is not evaluated */
-
-	  /* safe_dotimes: (car(body) is known to be a pair here)
-	   *   if 1-expr body look for syntactic case, if let(*) goto do_let, else opt_dotimes
-	   *       if they are unhappy, got safe_dotimes_step_o
-	   *   else goto opt_dotimes then safe_dotimes_step_o
-	   *   if multi-line body, check opt_dotimes, then safe_dotimes_step
-	   */
-	  if (s7_integer_clamped_if_gmp(sc, init_val) == s7_integer_clamped_if_gmp(sc, end_val))
-	    {
-	      sc->value = sc->T;
-	      sc->code = cdadr(code);
-	      return(goto_safe_do_end_clauses);
-	    }
-	  if ((is_null(cdr(sc->code))) &&
-	      (is_pair(car(sc->code))))
-	    {
-	      sc->code = car(sc->code);
-	      set_opt2_pair(code, sc->code); /* is_pair above */
-	      if ((is_syntactic_pair(sc->code)) ||
-		  (is_symbol_and_syntactic(car(sc->code))))
-		{
-		  if (!is_unsafe_do(code))
-		    {
-		      if (do_let_or_dotimes(sc, code, true))
-			return(goto_safe_do_end_clauses);
-		      set_unsafe_do(code);
-		    }
-		  push_stack(sc, OP_SAFE_DOTIMES_STEP_O, sc->args, code);
-		  if (is_syntactic_pair(sc->code))
-		    sc->cur_op = (opcode_t)optimize_op(sc->code);
-		  else
-		    {
-		      sc->cur_op = (opcode_t)symbol_syntax_op_checked(sc->code);
-		      pair_set_syntax_op(sc->code, sc->cur_op);
-		    }
-		  return(goto_top_no_pop);
-		}
-	      /* car not syntactic? */
-	      if ((!is_unsafe_do(code)) &&
-		  (opt_dotimes(sc, cddr(code), code, true)))
-		return(goto_safe_do_end_clauses);
-	      set_unsafe_do(code);
-
-	      if (has_fx(cddr(code))) /* this almost never happens and the func case below is only in timing tests */
-		{
-		  s7_int end = s7_integer_clamped_if_gmp(sc, end_val);
-		  s7_pointer body = cddr(code), stepper = slot_value(sc->args);
-		  for (; integer(stepper) < end; integer(stepper)++)
-		    fx_call(sc, body);
-		  sc->value = sc->T;
-		  sc->code = cdadr(code);
-		  return(goto_safe_do_end_clauses);
-		}
-	      push_stack(sc, OP_SAFE_DOTIMES_STEP_O, sc->args, code); /* arg is local step var slot, code is do form - do, sc->code is the body */
-	      return(goto_eval);
-	    }
-	  /* multi-line body */
-	  if ((!is_unsafe_do(code)) &&
-	      (opt_dotimes(sc, sc->code, code, true)))
-	    return(goto_safe_do_end_clauses);
-	  set_unsafe_do(code);
-	  set_opt2_pair(code, sc->code);
-	  push_stack(sc, OP_SAFE_DOTIMES_STEP, sc->args, code);
-	  return(goto_begin);
-	}}
+        {
+          sc->code = cddr(code);
+          set_curlet(sc, make_let(sc, sc->curlet));
+          sc->args = add_slot_checked(sc, sc->curlet, caaar(code), make_mutable_integer(sc, s7_integer_clamped_if_gmp(sc, init_val)));
+          set_loop_end(sc->args, s7_integer_clamped_if_gmp(sc, end_val));
+          set_has_loop_end(sc->args);  /* safe_dotimes step is by 1 */
+
+          /* (define (hi) (do ((i 1 (+ 1 i))) ((= i 1) i))) -- we need the let even if the loop is not evaluated */
+
+          /* safe_dotimes: (car(body) is known to be a pair here)
+           *   if 1-expr body look for syntactic case, if let(*) goto do_let, else opt_dotimes
+           *       if they are unhappy, got safe_dotimes_step_o
+           *   else goto opt_dotimes then safe_dotimes_step_o
+           *   if multi-line body, check opt_dotimes, then safe_dotimes_step
+           */
+          if (s7_integer_clamped_if_gmp(sc, init_val) == s7_integer_clamped_if_gmp(sc, end_val))
+            {
+              sc->value = sc->T;
+              sc->code = cdadr(code);
+              return(goto_safe_do_end_clauses);
+            }
+          if ((is_null(cdr(sc->code))) &&
+              (is_pair(car(sc->code))))
+            {
+              sc->code = car(sc->code);
+              set_opt2_pair(code, sc->code); /* is_pair above */
+              if ((is_syntactic_pair(sc->code)) ||
+                  (is_symbol_and_syntactic(car(sc->code))))
+                {
+                  if (!is_unsafe_do(code))
+                    {
+                      if (do_let_or_dotimes(sc, code, true))
+                        return(goto_safe_do_end_clauses);
+                      set_unsafe_do(code);
+                    }
+                  push_stack(sc, OP_SAFE_DOTIMES_STEP_O, sc->args, code);
+                  if (is_syntactic_pair(sc->code))
+                    sc->cur_op = (opcode_t)optimize_op(sc->code);
+                  else
+                    {
+                      sc->cur_op = (opcode_t)symbol_syntax_op_checked(sc->code);
+                      pair_set_syntax_op(sc->code, sc->cur_op);
+                    }
+                  return(goto_top_no_pop);
+                }
+              /* car not syntactic? */
+              if ((!is_unsafe_do(code)) &&
+                  (opt_dotimes(sc, cddr(code), code, true)))
+                return(goto_safe_do_end_clauses);
+              set_unsafe_do(code);
+
+              if (has_fx(cddr(code))) /* this almost never happens and the func case below is only in timing tests */
+                {
+                  s7_int end = s7_integer_clamped_if_gmp(sc, end_val);
+                  s7_pointer body = cddr(code), stepper = slot_value(sc->args);
+                  for (; integer(stepper) < end; integer(stepper)++)
+                    fx_call(sc, body);
+                  sc->value = sc->T;
+                  sc->code = cdadr(code);
+                  return(goto_safe_do_end_clauses);
+                }
+              push_stack(sc, OP_SAFE_DOTIMES_STEP_O, sc->args, code); /* arg is local step var slot, code is do form - do, sc->code is the body */
+              return(goto_eval);
+            }
+          /* multi-line body */
+          if ((!is_unsafe_do(code)) &&
+              (opt_dotimes(sc, sc->code, code, true)))
+            return(goto_safe_do_end_clauses);
+          set_unsafe_do(code);
+          set_opt2_pair(code, sc->code);
+          push_stack(sc, OP_SAFE_DOTIMES_STEP, sc->args, code);
+          return(goto_begin);
+        }}
   pair_set_syntax_op(form, OP_SIMPLE_DO);
   sc->code = form;
   if (op_simple_do(sc)) return(goto_do_end_clauses);
@@ -84135,7 +84135,7 @@ static goto_t op_safe_do(s7_scheme *sc)
       s7_pointer old_let = sc->curlet;
       sc->temp7 = old_let;
       if (opt_dotimes(sc, cddr(sc->code), sc->code, false))
-	return(goto_safe_do_end_clauses);
+        return(goto_safe_do_end_clauses);
       set_curlet(sc, old_let);  /* apparently s7_optimize can step on sc->curlet? */
       sc->temp7 = sc->unused;
     }
@@ -84144,29 +84144,29 @@ static goto_t op_safe_do(s7_scheme *sc)
     {
       s7_pointer body = caddr(sc->code);
       if ((car(body) == sc->set_symbol) &&
-	  (is_pair(cdr(body))) &&
-	  (is_symbol(cadr(body))) &&
-	  (is_pair(cddr(body))) &&
-	  (has_fx(cddr(body))) &&
-	  (is_null(cdddr(body))))                   /* so we're (set! symbol (fxable-expr...)) */
-	{
-	  s7_pointer step_slot = let_dox_slot1(sc->curlet);
-	  if (slot_symbol(step_slot) != cadr(body)) /* we're not setting the stepper */
-	    {
-	      s7_int endi = integer(let_dox2_value(sc->curlet));
-	      s7_pointer fx_p = cddr(body);
-	      s7_pointer val_slot = s7_slot(sc, cadr(body));
-	      s7_int step = integer(slot_value(step_slot));
-	      s7_pointer step_val = slot_value(step_slot);
-	      do {
-		slot_set_value(val_slot, fx_call(sc, fx_p));
-		set_integer(step_val, ++step);
-	      } while (step != endi); /* geq not needed here -- we're leq endi and stepping by +1 all ints */
-	      clear_mutable_integer(step_val);
-	      sc->value = sc->T;
-	      sc->code = cdadr(code);
-	      return(goto_safe_do_end_clauses);
-	    }}}
+          (is_pair(cdr(body))) &&
+          (is_symbol(cadr(body))) &&
+          (is_pair(cddr(body))) &&
+          (has_fx(cddr(body))) &&
+          (is_null(cdddr(body))))                   /* so we're (set! symbol (fxable-expr...)) */
+        {
+          s7_pointer step_slot = let_dox_slot1(sc->curlet);
+          if (slot_symbol(step_slot) != cadr(body)) /* we're not setting the stepper */
+            {
+              s7_int endi = integer(let_dox2_value(sc->curlet));
+              s7_pointer fx_p = cddr(body);
+              s7_pointer val_slot = s7_slot(sc, cadr(body));
+              s7_int step = integer(slot_value(step_slot));
+              s7_pointer step_val = slot_value(step_slot);
+              do {
+                slot_set_value(val_slot, fx_call(sc, fx_p));
+                set_integer(step_val, ++step);
+              } while (step != endi); /* geq not needed here -- we're leq endi and stepping by +1 all ints */
+              clear_mutable_integer(step_val);
+              sc->value = sc->T;
+              sc->code = cdadr(code);
+              return(goto_safe_do_end_clauses);
+            }}}
   sc->code = cddr(code);
   set_unsafe_do(sc->code);
   set_opt2_pair(code, sc->code);
@@ -84223,7 +84223,7 @@ static goto_t op_dotimes_p(s7_scheme *sc)
       set_has_loop_end(sc->args);                  /* dotimes step is by 1 */
       sc->code = cdr(sc->code);
       if (do_let_or_dotimes(sc, code, false))
-	return(goto_do_end_clauses); /* not safe_do here */
+        return(goto_do_end_clauses); /* not safe_do here */
       slot_set_value(sc->args, old_init);
       set_curlet(sc, old_e); /* free_cell(sc, sc->curlet) beforehand is not safe */
       sc->args = old_args;
@@ -84246,18 +84246,18 @@ static bool op_do_init_1(s7_scheme *sc)
       /* here sc->code is a list like: ((i 0 (+ i 1)) ...) so cadar gets the init value */
       init = cdar(sc->code);
       if (has_fx(init))
-	sc->value = fx_call(sc, init);
+        sc->value = fx_call(sc, init);
       else
-	{
-	  init = car(init);
-	  if (is_pair(init))
-	    {
-	      push_stack(sc, OP_DO_INIT, sc->args, cdr(sc->code));  /* OP_DO_INIT only used here */
-	      sc->code = init;
-	      return(true); /* goto eval */
-	    }
-	  sc->value = (is_symbol(init)) ? lookup_checked(sc, init) : init;
-	}
+        {
+          init = car(init);
+          if (is_pair(init))
+            {
+              push_stack(sc, OP_DO_INIT, sc->args, cdr(sc->code));  /* OP_DO_INIT only used here */
+              sc->code = init;
+              return(true); /* goto eval */
+            }
+          sc->value = (is_symbol(init)) ? lookup_checked(sc, init) : init;
+        }
       sc->code = cdr(sc->code);
     }
   /* all the initial values are now in the args list */
@@ -84280,10 +84280,10 @@ static bool op_do_init_1(s7_scheme *sc)
       let_set_slots(sc->curlet, y);
       symbol_set_local_slot(sym, let_id(sc->curlet), y);
       if (is_pair(cddar(x)))                   /* else no incr expr, so ignore it henceforth */
-	{
-	  slot_set_expression(y, cddar(x));
-	  sc->value = cons_unchecked(sc, y, sc->value);
-	}
+        {
+          slot_set_expression(y, cddar(x));
+          sc->value = cons_unchecked(sc, y, sc->value);
+        }
       y = args;
     }
   sc->args = cons(sc, sc->value = proper_list_reverse_in_place(sc, sc->value), cadr(sc->code));
@@ -84295,8 +84295,8 @@ static bool op_do_init(s7_scheme *sc)
 {
   if (is_multiple_value(sc->value))               /* (do ((i (values 1 2)))...) */
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_2(sc, wrap_string(sc, "do: variable initial value can't be ~S", 38),
-			     set_ulist_1(sc, sc->values_symbol, sc->value)));
+             set_elist_2(sc, wrap_string(sc, "do: variable initial value can't be ~S", 38),
+                             set_ulist_1(sc, sc->values_symbol, sc->value)));
   return(!op_do_init_1(sc));
 }
 
@@ -84328,11 +84328,11 @@ static bool op_do_end(s7_scheme *sc)
   if (is_pair(cdr(sc->args)))
     {
       if (!has_fx(cdr(sc->args)))
-	{
-	  push_stack_direct(sc, OP_DO_END1);
-	  sc->code = cadr(sc->args);              /* evaluate the end expr */
-	  return(true);
-	}
+        {
+          push_stack_direct(sc, OP_DO_END1);
+          sc->code = cadr(sc->args);              /* evaluate the end expr */
+          return(true);
+        }
       sc->value = fx_call(sc, cdr(sc->args));
     }
   else sc->value = sc->F;                         /* goto "if (is_pair(sc->code))..." below */
@@ -84360,7 +84360,7 @@ static goto_t op_do_end_true(s7_scheme *sc)
   if (is_null(sc->code))
     {
       if (is_multiple_value(sc->value))  /* (define (f) (+ 1 (do ((i 2 (+ i 1))) ((values i (+ i 1)))))) -> 6 */
-	sc->value = splice_in_values(sc, multiple_value(sc->value));
+        sc->value = splice_in_values(sc, multiple_value(sc->value));
       /* similarly, if the result is a multiple value: (define (f) (+ 1 (do ((i 2 (+ i 1))) ((= i 3) (values i (+ i 1)))))) -> 8 */
       return(goto_start);
     }
@@ -84368,10 +84368,10 @@ static goto_t op_do_end_true(s7_scheme *sc)
   if (is_null(cdr(sc->code)))
     {
       if (has_fx(sc->code))
-	{
-	  sc->value = fx_call(sc, sc->code);
-	  return(goto_start);
-	}
+        {
+          sc->value = fx_call(sc, sc->code);
+          return(goto_start);
+        }
       sc->code = car(sc->code);
       return(goto_eval);
     }
@@ -84389,10 +84389,10 @@ static inline s7_pointer apply_c_function(s7_scheme *sc, s7_pointer func, s7_poi
   s7_int len = proper_list_length(args);
   if (len < c_function_min_args(func))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), func, func, args));
+             set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), func, func, args));
   if (c_function_max_args(func) < len)
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, args));
+             set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, args));
   return(c_function_call(func)(sc, args));
   /* just by chance, this code is identical to macroexpand_c_macro's code (after macro expansion)! So,
    *   gcc -O2 uses the macroexpand code, but then valgrind shows us calling macros all the time, and
@@ -84405,10 +84405,10 @@ static s7_pointer apply_c_function_unopt(s7_scheme *sc, s7_pointer func, s7_poin
   s7_int len = proper_list_length(args);
   if (len < c_function_min_args(func))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), func, func, args));
+             set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), func, func, args));
   if (c_function_max_args(func) < len)
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, args));
+             set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), func, func, args));
   return(c_function_call(func)(sc, args));
 }
 
@@ -84418,15 +84418,15 @@ static void apply_c_rst_no_req_function(s7_scheme *sc)      /* -------- C-based
   sc->value = c_function_call(sc->code)(sc, sc->args);
 }
 
-static void apply_c_macro(s7_scheme *sc)  	            /* -------- C-based macro -------- */
+static void apply_c_macro(s7_scheme *sc)                      /* -------- C-based macro -------- */
 {
   s7_int len = proper_list_length(sc->args);
   if (len < c_macro_min_args(sc->code))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), sc->code, sc->code, sc->args));
+             set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), sc->code, sc->code, sc->args));
   if (c_macro_max_args(sc->code) < len)
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), sc->code, sc->code, sc->args));
+             set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), sc->code, sc->code, sc->args));
   sc->code = c_macro_call(sc->code)(sc, sc->args);
 }
 
@@ -84437,21 +84437,21 @@ static void apply_syntax(s7_scheme *sc)                    /* -------- syntactic
     {
       len = s7_list_length(sc, sc->args);
       if (len == 0)
-	syntax_error_nr(sc, "attempt to evaluate a circular list: ~S", 39, sc->args);
+        syntax_error_nr(sc, "attempt to evaluate a circular list: ~S", 39, sc->args);
       if ((sc->safety > NO_SAFETY) &&
-	  (tree_is_cyclic(sc, sc->args)))
-	error_nr(sc, sc->syntax_error_symbol,
-		 set_elist_3(sc, wrap_string(sc, "apply ~S: body is circular: ~S", 30), sc->code, sc->args));
+          (tree_is_cyclic(sc, sc->args)))
+        error_nr(sc, sc->syntax_error_symbol,
+                 set_elist_3(sc, wrap_string(sc, "apply ~S: body is circular: ~S", 30), sc->code, sc->args));
     }
   else len = 0;
 
   if (len < syntax_min_args(sc->code))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), sc->code, sc->code, sc->args));
+             set_elist_4(sc, wrap_string(sc, "~A: not enough arguments: (~A~{~^ ~S~})", 39), sc->code, sc->code, sc->args));
   if ((syntax_max_args(sc->code) < len) &&
       (syntax_max_args(sc->code) != -1))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-		set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), sc->code, sc->code, sc->args));
+                set_elist_4(sc, wrap_string(sc, "~A: too many arguments: (~A~{~^ ~S~})", 37), sc->code, sc->code, sc->args));
   sc->cur_op = syntax_opcode(sc->code);          /* (apply begin '((define x 3) (+ x 2))) */
   /* I had elaborate checks here for embedded circular lists, but now I think that is the caller's problem */
   sc->code = cons(sc, sc->code, sc->args);
@@ -84470,8 +84470,8 @@ static void apply_vector(s7_scheme *sc)                    /* -------- vector as
     {
       s7_int index = s7_integer_clamped_if_gmp(sc, car(sc->args));
       if ((index >= 0) &&
-	  (index < vector_length(sc->code)))
-	sc->value = vector_getter(sc->code)(sc, sc->code, index);
+          (index < vector_length(sc->code)))
+        sc->value = vector_getter(sc->code)(sc, sc->code, index);
       else out_of_range_error_nr(sc, sc->vector_ref_symbol, int_two, car(sc->args), (index < 0) ? it_is_negative_string : it_is_too_large_string);
     }
   else sc->value = vector_ref_1(sc, sc->code, sc->args);
@@ -84481,20 +84481,20 @@ static void apply_string(s7_scheme *sc)                    /* -------- string as
 {
   if (!is_pair(sc->args))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_3(sc, wrap_string(sc, "impicit string-ref needs an index argument: (~S~{~^ ~S~})", 57), sc->code, sc->args));
+             set_elist_3(sc, wrap_string(sc, "impicit string-ref needs an index argument: (~S~{~^ ~S~})", 57), sc->code, sc->args));
   if (!is_null(cdr(sc->args)))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_3(sc, wrap_string(sc, "string ref: too many indices: (~S~{~^ ~S~})", 43), sc->code, sc->args));
+             set_elist_3(sc, wrap_string(sc, "string ref: too many indices: (~S~{~^ ~S~})", 43), sc->code, sc->args));
 
   if (s7_is_integer(car(sc->args)))
     {
       s7_int index = s7_integer_clamped_if_gmp(sc, car(sc->args));
       if ((index >= 0) &&
-	  (index < string_length(sc->code)))
-	{
-	  sc->value = chars[((uint8_t *)string_value(sc->code))[index]];
-	  return;
-	}}
+          (index < string_length(sc->code)))
+        {
+          sc->value = chars[((uint8_t *)string_value(sc->code))[index]];
+          return;
+        }}
   sc->value = string_ref_1(sc, sc->code, car(sc->args));
 }
 
@@ -84540,7 +84540,7 @@ static void apply_iterator(s7_scheme *sc)                  /* -------- iterator
 {
   if (!is_null(sc->args))
     error_nr(sc, sc->wrong_number_of_args_symbol,
-	     set_elist_3(sc, wrap_string(sc, "iterator takes no arguments: (~A~{~^ ~S~})", 42), sc->code, sc->args));
+             set_elist_3(sc, wrap_string(sc, "iterator takes no arguments: (~A~{~^ ~S~})", 42), sc->code, sc->args));
   sc->value = s7_iterate(sc, sc->code);
 }
 
@@ -84553,15 +84553,15 @@ static Inline void inline_apply_lambda(s7_scheme *sc)      /* -------- normal fu
     {
       s7_pointer sym = car(x);
       if (is_null(z))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_5(sc, wrap_string(sc, "~S: not enough arguments: ((~S ~S ...)~{~^ ~S~})", 48),
-			     closure_name(sc, sc->code),
-			     (is_closure(sc->code)) ? sc->lambda_symbol : ((is_bacro(sc->code)) ? sc->bacro_symbol : sc->macro_symbol),
-			     closure_args(sc->code), sc->args));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_5(sc, wrap_string(sc, "~S: not enough arguments: ((~S ~S ...)~{~^ ~S~})", 48),
+                             closure_name(sc, sc->code),
+                             (is_closure(sc->code)) ? sc->lambda_symbol : ((is_bacro(sc->code)) ? sc->bacro_symbol : sc->macro_symbol),
+                             closure_args(sc->code), sc->args));
       slot = make_slot(sc, sym, T_Ext(unchecked_car(z)));
       symbol_set_local_slot(sym, id, slot);
       if (tis_slot(last_slot))
-	slot_set_next(last_slot, slot);
+        slot_set_next(last_slot, slot);
       else let_set_slots(e, slot);
       last_slot = slot;
       slot_set_next(slot, slot_end);
@@ -84569,18 +84569,18 @@ static Inline void inline_apply_lambda(s7_scheme *sc)      /* -------- normal fu
   if (is_null(x))
     {
       if (is_not_null(z))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_5(sc, wrap_string(sc, "~S: too many arguments: ((~S ~S ...)~{~^ ~S~})", 46),
-			     closure_name(sc, sc->code),
-			     (is_closure(sc->code)) ? sc->lambda_symbol : ((is_bacro(sc->code)) ? sc->bacro_symbol : sc->macro_symbol),
-			     closure_args(sc->code), sc->args));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_5(sc, wrap_string(sc, "~S: too many arguments: ((~S ~S ...)~{~^ ~S~})", 46),
+                             closure_name(sc, sc->code),
+                             (is_closure(sc->code)) ? sc->lambda_symbol : ((is_bacro(sc->code)) ? sc->bacro_symbol : sc->macro_symbol),
+                             closure_args(sc->code), sc->args));
     }
   else
     {
       slot = make_slot(sc, x, z);
       symbol_set_local_slot(x, id, slot);
       if (tis_slot(last_slot))
-	slot_set_next(last_slot, slot);
+        slot_set_next(last_slot, slot);
       else let_set_slots(e, slot);
       slot_set_next(slot, slot_end);
     }
@@ -84616,24 +84616,24 @@ static void op_f_np(s7_scheme *sc)   /* sc->code: ((lambda (x y) (+ x y)) (value
     {
       s7_pointer last_slot;
       if (is_null(cdr(sc->code))) /* ((lambda (x) 21)) */
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_3(sc, wrap_string(sc, "not enough arguments: ((lambda ~S ...)~{~^ ~S~})", 48),
-			     cadar(sc->code), cdr(sc->code)));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_3(sc, wrap_string(sc, "not enough arguments: ((lambda ~S ...)~{~^ ~S~})", 48),
+                             cadar(sc->code), cdr(sc->code)));
       if (is_constant(sc, car(pars)))
-	error_nr(sc, sc->syntax_error_symbol,        /* (lambda (a) 1) where 'a is immutable (locally perhaps) */
-		 set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is a constant: ((lambda ~S ...)~{~^ ~S~})", 61),
-			     car(pars), cadar(sc->code), cdr(sc->code)));
+        error_nr(sc, sc->syntax_error_symbol,        /* (lambda (a) 1) where 'a is immutable (locally perhaps) */
+                 set_elist_4(sc, wrap_string(sc, "lambda parameter ~S is a constant: ((lambda ~S ...)~{~^ ~S~})", 61),
+                             car(pars), cadar(sc->code), cdr(sc->code)));
 
       add_slot_unchecked_no_local(sc, e, car(pars), sc->undefined);
       last_slot = let_slots(e);
       for (pars = cdr(pars); is_pair(pars); pars = cdr(pars))
-	last_slot = add_slot_at_end_no_local(sc, last_slot, car(pars), sc->undefined);
+        last_slot = add_slot_at_end_no_local(sc, last_slot, car(pars), sc->undefined);
       /* last par might be rest par (dotted) */
       if (!is_null(pars))
-	{
-	  last_slot = add_slot_at_end_no_local(sc, last_slot, pars, sc->undefined);
-	  set_is_rest_slot(last_slot);
-	}}
+        {
+          last_slot = add_slot_at_end_no_local(sc, last_slot, pars, sc->undefined);
+          set_is_rest_slot(last_slot);
+        }}
   /* check_stack_size(sc); */
   if ((sc->stack_end + 4) >= sc->stack_resize_trigger) resize_stack(sc);
   push_stack(sc, OP_GC_PROTECT, let_slots(e), cddr(sc->code)); /* not for gc-protection, but as implicit loop vars */
@@ -84648,19 +84648,19 @@ static bool op_f_np_1(s7_scheme *sc)
     {
       s7_pointer p, oslot = slot;
       for (p = sc->value; (is_pair(p)) && (tis_slot(slot)); p = cdr(p), oslot = slot, slot = next_slot(slot))
-	if (is_rest_slot(slot))
-	  {
-	    if (slot_value(slot) == sc->undefined)
-	      slot_set_value(slot, copy_proper_list(sc, p));
-	    else slot_set_value(slot, pair_append(sc, slot_value(slot), copy_proper_list(sc, p)));
-	    p = sc->nil;
-	    break;
-	  }
-	else slot_set_value(slot, car(p));
+        if (is_rest_slot(slot))
+          {
+            if (slot_value(slot) == sc->undefined)
+              slot_set_value(slot, copy_proper_list(sc, p));
+            else slot_set_value(slot, pair_append(sc, slot_value(slot), copy_proper_list(sc, p)));
+            p = sc->nil;
+            break;
+          }
+        else slot_set_value(slot, car(p));
       if (is_pair(p))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_3(sc, wrap_string(sc, "not enough arguments: ((lambda ~S ...)~{~^ ~S~})", 48),
-			     cadar(sc->code), cdr(sc->code)));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_3(sc, wrap_string(sc, "not enough arguments: ((lambda ~S ...)~{~^ ~S~})", 48),
+                             cadar(sc->code), cdr(sc->code)));
       slot = oslot; /* snd-test 22 grani */
     }
   else /* not mv */
@@ -84668,15 +84668,15 @@ static bool op_f_np_1(s7_scheme *sc)
       slot_set_value(slot, sc->value);
     else
       if (slot_value(slot) == sc->undefined)
-	slot_set_value(slot, list_1(sc, sc->value));
+        slot_set_value(slot, list_1(sc, sc->value));
       else slot_set_value(slot, pair_append(sc, slot_value(slot), list_1(sc, sc->value)));
 
   if (is_pair(arg))
     {
       if ((!tis_slot(next_slot(slot))) && (!is_rest_slot(slot)))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_3(sc, wrap_string(sc, "too many arguments: ((lambda ~S ...)~{~^ ~S~})", 46),
-			     cadar(sc->code), cdr(sc->code)));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_3(sc, wrap_string(sc, "too many arguments: ((lambda ~S ...)~{~^ ~S~})", 46),
+                             cadar(sc->code), cdr(sc->code)));
       set_stack_protected1(sc, (is_rest_slot(slot)) ? slot : next_slot(slot));
       set_stack_protected2(sc, cdr(arg));
       push_stack_direct(sc, OP_F_NP_1); /* sc->args=e, sc->code from start */
@@ -84686,11 +84686,11 @@ static bool op_f_np_1(s7_scheme *sc)
   if (tis_slot(next_slot(slot)))
     {
       if (!is_rest_slot(next_slot(slot)))
-	error_nr(sc, sc->wrong_number_of_args_symbol,
-		 set_elist_3(sc, wrap_string(sc, "not enough arguments: ((lambda ~S ...)~{~^ ~S~})", 48),
-			     cadar(sc->code), cdr(sc->code)));
+        error_nr(sc, sc->wrong_number_of_args_symbol,
+                 set_elist_3(sc, wrap_string(sc, "not enough arguments: ((lambda ~S ...)~{~^ ~S~})", 48),
+                             cadar(sc->code), cdr(sc->code)));
       if (slot_value(next_slot(slot)) == sc->undefined)
-	slot_set_value(next_slot(slot), sc->nil);
+        slot_set_value(next_slot(slot), sc->nil);
     }
   e = sc->args;
   let_set_id(e, ++sc->let_number);
@@ -84706,11 +84706,11 @@ static void op_lambda_star(s7_scheme *sc)
   check_lambda_star(sc);
   if (!is_pair(car(sc->code)))
     sc->value = make_closure(sc, car(sc->code), cdr(sc->code),
-			     (is_symbol(car(sc->code))) ? (T_CLOSURE | T_COPY_ARGS) : T_CLOSURE,
-			     CLOSURE_ARITY_NOT_SET);
+                             (is_symbol(car(sc->code))) ? (T_CLOSURE | T_COPY_ARGS) : T_CLOSURE,
+                             CLOSURE_ARITY_NOT_SET);
   else sc->value = make_closure(sc, car(sc->code), cdr(sc->code),
-				(!arglist_has_rest(sc, car(sc->code))) ? T_CLOSURE_STAR : (T_CLOSURE_STAR | T_COPY_ARGS),
-				CLOSURE_ARITY_NOT_SET);
+                                (!arglist_has_rest(sc, car(sc->code))) ? T_CLOSURE_STAR : (T_CLOSURE_STAR | T_COPY_ARGS),
+                                CLOSURE_ARITY_NOT_SET);
 }
 
 static void op_lambda_star_unchecked(s7_scheme *sc)
@@ -84718,21 +84718,21 @@ static void op_lambda_star_unchecked(s7_scheme *sc)
   s7_pointer code = cdr(sc->code);
   if (!is_pair(car(code)))
     sc->value = make_closure(sc, car(code), cdr(code),
-			     (is_symbol(car(code))) ? (T_CLOSURE | T_COPY_ARGS) : T_CLOSURE,
-			     CLOSURE_ARITY_NOT_SET);
+                             (is_symbol(car(code))) ? (T_CLOSURE | T_COPY_ARGS) : T_CLOSURE,
+                             CLOSURE_ARITY_NOT_SET);
   else sc->value = make_closure(sc, car(code), cdr(code),
-				(!arglist_has_rest(sc, car(code))) ? T_CLOSURE_STAR : (T_CLOSURE_STAR | T_COPY_ARGS),
-				CLOSURE_ARITY_NOT_SET);
+                                (!arglist_has_rest(sc, car(code))) ? T_CLOSURE_STAR : (T_CLOSURE_STAR | T_COPY_ARGS),
+                                CLOSURE_ARITY_NOT_SET);
 }
 
 static s7_pointer star_set(s7_scheme *sc, s7_pointer slot, s7_pointer val, bool check_rest)
 {
   if (is_checked_slot(slot))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_3(sc, parameter_set_twice_string, slot_symbol(slot), sc->args));
+             set_elist_3(sc, parameter_set_twice_string, slot_symbol(slot), sc->args));
   if ((check_rest) && (is_rest_slot(slot)))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_3(sc, wrap_string(sc, "can't set rest argument ~S to ~S via keyword", 44), slot_symbol(slot), val));
+             set_elist_3(sc, wrap_string(sc, "can't set rest argument ~S to ~S via keyword", 44), slot_symbol(slot), val));
   set_checked_slot(slot);
   slot_set_value(slot, val);
   return(val);
@@ -84757,77 +84757,77 @@ static s7_pointer lambda_star_set_args(s7_scheme *sc)
   bool allow_other_keys = ((is_pair(pars)) && (allows_other_keys(pars)));
 
   while ((is_pair(pars)) &&
-	 (is_pair(arg_vals)))
+         (is_pair(arg_vals)))
     {
       if (car(pars) == sc->rest_keyword)           /* the rest arg: a default is not allowed here (see check_lambda_star_args) */
-	{
-	  /* next arg is bound to trailing args from this point as a list */
-	  pars = cdr(pars);
-	  if ((is_symbol_and_keyword(car(arg_vals))) &&
-	      (is_pair(cdr(arg_vals))) &&
-	      (keyword_symbol(car(arg_vals)) == car(pars)))
-	    error_nr(sc, sc->wrong_type_arg_symbol,
-		     set_elist_3(sc, wrap_string(sc, "can't set rest argument ~S to ~S via keyword", 44),
-				 car(pars), cadr(arg_vals)));
-	  lambda_star_argument_set_value(sc, car(pars), (in_heap(arg_vals)) ? arg_vals : copy_proper_list(sc, arg_vals), slot, false); /* sym5 :rest bug */
-	  rest_key = sc->rest_keyword;
-	  arg_vals = cdr(arg_vals);
-	  pars = cdr(pars);
-	  slot = next_slot(slot);
-	}
+        {
+          /* next arg is bound to trailing args from this point as a list */
+          pars = cdr(pars);
+          if ((is_symbol_and_keyword(car(arg_vals))) &&
+              (is_pair(cdr(arg_vals))) &&
+              (keyword_symbol(car(arg_vals)) == car(pars)))
+            error_nr(sc, sc->wrong_type_arg_symbol,
+                     set_elist_3(sc, wrap_string(sc, "can't set rest argument ~S to ~S via keyword", 44),
+                                 car(pars), cadr(arg_vals)));
+          lambda_star_argument_set_value(sc, car(pars), (in_heap(arg_vals)) ? arg_vals : copy_proper_list(sc, arg_vals), slot, false); /* sym5 :rest bug */
+          rest_key = sc->rest_keyword;
+          arg_vals = cdr(arg_vals);
+          pars = cdr(pars);
+          slot = next_slot(slot);
+        }
       else
-	{
-	  s7_pointer arg_val = car(arg_vals);
-	  if (is_symbol_and_keyword(arg_val))
-	    {
-	      if (!is_pair(cdr(arg_vals)))
-		{
-		  if (!sc->accept_all_keyword_arguments)
-		    error_nr(sc, sc->wrong_type_arg_symbol,
-			     set_elist_4(sc, keyword_value_missing_string, closure_name(sc, code), arg_vals, args));
-		  slot_set_value(slot, arg_val);
-		  set_checked_slot(slot);
-		  arg_vals = cdr(arg_vals);
-		}
-	      else
-		{
-		  s7_pointer sym = keyword_symbol(arg_val);
-		  if (lambda_star_argument_set_value(sc, sym, cadr(arg_vals), slot, true) == sc->no_value)
-		    {
-		      /* if default value is a key, go ahead and use this value. (define* (f (a :b)) a) (f :c), this has become much trickier than I anticipated... */
-		      if (allow_other_keys)
-			/* in CL: (defun hi (&key (a 1) &allow-other-keys) a) (hi :b :a :a 3) -> 3
-			 * in s7: (define* (hi (a 1) :allow-other-keys) a)    (hi :b :a :a 3) -> 3
-			 */
-			arg_vals = cddr(arg_vals);
-		      else
-			{
-			  if (!sc->accept_all_keyword_arguments)
-			    error_nr(sc, sc->wrong_type_arg_symbol,
-				     set_elist_4(sc, wrap_string(sc, "~A: unknown key: ~S in ~S", 25), closure_name(sc, code), arg_vals, args));
-			  slot_set_value(slot, arg_val);
-			  set_checked_slot(slot);
-			  arg_vals = cdr(arg_vals);
-			  pars = cdr(pars);
-			  slot = next_slot(slot);
-			}
-		      continue;
-		    }
-		  arg_vals = cddr(arg_vals);
-		}
-	      slot = next_slot(slot);
-	    }
-	  else /* not a key/value pair */
-	    {
-	      if (is_checked_slot(slot))
-		error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, parameter_set_twice_string, slot_symbol(slot), sc->args));
-	      set_checked_slot(slot);
-	      slot_set_value(slot, car(arg_vals));
-	      slot = next_slot(slot);
-	      arg_vals = cdr(arg_vals);
-	    }
-	  pars = cdr(pars);
-	}}
+        {
+          s7_pointer arg_val = car(arg_vals);
+          if (is_symbol_and_keyword(arg_val))
+            {
+              if (!is_pair(cdr(arg_vals)))
+                {
+                  if (!sc->accept_all_keyword_arguments)
+                    error_nr(sc, sc->wrong_type_arg_symbol,
+                             set_elist_4(sc, keyword_value_missing_string, closure_name(sc, code), arg_vals, args));
+                  slot_set_value(slot, arg_val);
+                  set_checked_slot(slot);
+                  arg_vals = cdr(arg_vals);
+                }
+              else
+                {
+                  s7_pointer sym = keyword_symbol(arg_val);
+                  if (lambda_star_argument_set_value(sc, sym, cadr(arg_vals), slot, true) == sc->no_value)
+                    {
+                      /* if default value is a key, go ahead and use this value. (define* (f (a :b)) a) (f :c), this has become much trickier than I anticipated... */
+                      if (allow_other_keys)
+                        /* in CL: (defun hi (&key (a 1) &allow-other-keys) a) (hi :b :a :a 3) -> 3
+                         * in s7: (define* (hi (a 1) :allow-other-keys) a)    (hi :b :a :a 3) -> 3
+                         */
+                        arg_vals = cddr(arg_vals);
+                      else
+                        {
+                          if (!sc->accept_all_keyword_arguments)
+                            error_nr(sc, sc->wrong_type_arg_symbol,
+                                     set_elist_4(sc, wrap_string(sc, "~A: unknown key: ~S in ~S", 25), closure_name(sc, code), arg_vals, args));
+                          slot_set_value(slot, arg_val);
+                          set_checked_slot(slot);
+                          arg_vals = cdr(arg_vals);
+                          pars = cdr(pars);
+                          slot = next_slot(slot);
+                        }
+                      continue;
+                    }
+                  arg_vals = cddr(arg_vals);
+                }
+              slot = next_slot(slot);
+            }
+          else /* not a key/value pair */
+            {
+              if (is_checked_slot(slot))
+                error_nr(sc, sc->wrong_type_arg_symbol, set_elist_3(sc, parameter_set_twice_string, slot_symbol(slot), sc->args));
+              set_checked_slot(slot);
+              slot_set_value(slot, car(arg_vals));
+              slot = next_slot(slot);
+              arg_vals = cdr(arg_vals);
+            }
+          pars = cdr(pars);
+        }}
   /* (let () (define* (hi (a 1) :allow-other-keys) a) (hi :a 2 32)) -> 'error */
   /* (let () (define* (f (a :b)) a) (list (f) (f 1) (f :c) (f :a :c) (f :a 1) (f))) -> 'error */
 
@@ -84835,38 +84835,38 @@ static s7_pointer lambda_star_set_args(s7_scheme *sc)
   if (is_not_null(arg_vals))
     {
       if ((is_not_null(pars)) ||
-	  (rest_key == sc->rest_keyword))
-	{
-	  if (is_symbol(pars))
-	    {
-	      if ((is_symbol_and_keyword(car(arg_vals))) &&
-		  (is_pair(cdr(arg_vals))) &&
-		  (keyword_symbol(car(arg_vals)) == pars))
-		error_nr(sc, sc->wrong_type_arg_symbol,
-			 set_elist_3(sc, wrap_string(sc, "can't set rest argument ~S to ~S via keyword", 44), pars, cadr(arg_vals)));
-	      slot_set_value(slot, (in_heap(arg_vals)) ? arg_vals : copy_proper_list(sc, arg_vals)); /* sym5 :rest bug */
-	    }}
+          (rest_key == sc->rest_keyword))
+        {
+          if (is_symbol(pars))
+            {
+              if ((is_symbol_and_keyword(car(arg_vals))) &&
+                  (is_pair(cdr(arg_vals))) &&
+                  (keyword_symbol(car(arg_vals)) == pars))
+                error_nr(sc, sc->wrong_type_arg_symbol,
+                         set_elist_3(sc, wrap_string(sc, "can't set rest argument ~S to ~S via keyword", 44), pars, cadr(arg_vals)));
+              slot_set_value(slot, (in_heap(arg_vals)) ? arg_vals : copy_proper_list(sc, arg_vals)); /* sym5 :rest bug */
+            }}
       else
-	{
-	  if (!allow_other_keys)                                 /* ((lambda* (a) a) :a 1 2) */
-	    error_nr(sc, sc->wrong_number_of_args_symbol,
-		     set_elist_4(sc, wrap_string(sc, "too many arguments: (~S ~S ...)~{~^ ~S~})", 41),
-				 (is_closure_star(code)) ? sc->lambda_star_symbol : ((is_bacro_star(sc->code)) ? sc->bacro_star_symbol : sc->macro_star_symbol),
-				 closure_args(code), args));
-	  /* check trailing args for repeated keys or keys with no values or values with no keys */
-	  while (is_pair(arg_vals))
-	    {
-	      if ((!is_symbol_and_keyword(car(arg_vals))) ||     /* ((lambda* (a :allow-other-keys) a) :a 1 :b 2 3) */
-		  (!is_pair(cdr(arg_vals))))                     /* ((lambda* (a :allow-other-keys) a) :a 1 :b) */
-		error_nr(sc, sc->wrong_type_arg_symbol,
-			 set_elist_3(sc, wrap_string(sc, "~A: not a key/value pair: ~S", 28), closure_name(sc, code), arg_vals));
-	      slot = symbol_to_local_slot(sc, keyword_symbol(car(arg_vals)), sc->curlet);
-	      if ((is_slot(slot)) &&
-		  (is_checked_slot(slot)))
-		error_nr(sc, sc->wrong_type_arg_symbol,
-			 set_elist_3(sc, parameter_set_twice_string, slot_symbol(slot), sc->args));
-	      arg_vals = cddr(arg_vals);
-	    }}}
+        {
+          if (!allow_other_keys)                                 /* ((lambda* (a) a) :a 1 2) */
+            error_nr(sc, sc->wrong_number_of_args_symbol,
+                     set_elist_4(sc, wrap_string(sc, "too many arguments: (~S ~S ...)~{~^ ~S~})", 41),
+                                 (is_closure_star(code)) ? sc->lambda_star_symbol : ((is_bacro_star(sc->code)) ? sc->bacro_star_symbol : sc->macro_star_symbol),
+                                 closure_args(code), args));
+          /* check trailing args for repeated keys or keys with no values or values with no keys */
+          while (is_pair(arg_vals))
+            {
+              if ((!is_symbol_and_keyword(car(arg_vals))) ||     /* ((lambda* (a :allow-other-keys) a) :a 1 :b 2 3) */
+                  (!is_pair(cdr(arg_vals))))                     /* ((lambda* (a :allow-other-keys) a) :a 1 :b) */
+                error_nr(sc, sc->wrong_type_arg_symbol,
+                         set_elist_3(sc, wrap_string(sc, "~A: not a key/value pair: ~S", 28), closure_name(sc, code), arg_vals));
+              slot = symbol_to_local_slot(sc, keyword_symbol(car(arg_vals)), sc->curlet);
+              if ((is_slot(slot)) &&
+                  (is_checked_slot(slot)))
+                error_nr(sc, sc->wrong_type_arg_symbol,
+                         set_elist_3(sc, parameter_set_twice_string, slot_symbol(slot), sc->args));
+              arg_vals = cddr(arg_vals);
+            }}}
   return(sc->nil);
 }
 
@@ -84875,46 +84875,46 @@ static inline bool lambda_star_default(s7_scheme *sc)
   for (s7_pointer z = sc->args; tis_slot(z); z = next_slot(z))
     {
       if ((slot_value(z) == sc->undefined) &&    /* trouble: (lambda* ((e #<undefined>))...) */
-	  (slot_has_expression(z)) &&            /* if default val is not a pair or a symbol, this is false */
-	  (!is_checked_slot(z)))
-	{
-	  s7_pointer val = slot_expression(z);
-	  if (is_symbol(val))
-	    {
-	      slot_set_value(z, lookup_checked(sc, val));
-	      if (slot_value(z) == sc->undefined)
-		{
-		  /* the current environment here contains the function parameters which defaulted to #<undefined>
-		   *   (or maybe #<unused>?) earlier in apply_*_closure_star_1, so (define (f f) (define* (f (f f)) f) (f)) (f 0)
-		   *   looks for the default f, finds itself currently undefined, and raises an error! So, before
-		   *   claiming it is unbound, we need to check outlet as well. But in the case above, the inner
-		   *   define* shadows the caller's parameter before checking the default arg values, so the default f
-		   *   refers to the define* -- I'm not sure this is a bug.  It means that (define* (f (a f)) a)
-		   *   returns f: (equal? f (f)) -> #t, so any outer f needs an extra let and endless outlets:
-		   *   (let ((f 3)) (let () (define* (f (a ((outlet (outlet (outlet (curlet)))) 'f))) a) (f))) -> 3
-		   *   We want the shadowing once the define* is done, so the current mess is simplest.
-		   */
-		  slot_set_value(z, s7_symbol_local_value(sc, val, let_outlet(sc->curlet)));
-		  if (slot_value(z) == sc->undefined)
-		    syntax_error_nr(sc, "lambda* defaults: ~A is unbound", 31, slot_symbol(z));
-		}}
-	  else
-	    if (!is_pair(val))
-	      slot_set_value(z, val);
-	    else
-	      if (is_quote(car(val)))
-		{
-		  if ((!is_pair(cdr(val))) ||      /* (lambda* ((a (quote))) a) or (lambda* ((a (quote 1 1))) a) etc */
-		      (is_pair(cddr(val))))
-		    syntax_error_nr(sc, "lambda* default: ~A is messed up", 32, val);
-		  slot_set_value(z, cadr(val));
-		}
-	      else
-		{
-		  push_stack(sc, OP_LAMBDA_STAR_DEFAULT, z, sc->code);
-		  sc->code = val;
-		  return(true); /* goto eval */
-		}}}
+          (slot_has_expression(z)) &&            /* if default val is not a pair or a symbol, this is false */
+          (!is_checked_slot(z)))
+        {
+          s7_pointer val = slot_expression(z);
+          if (is_symbol(val))
+            {
+              slot_set_value(z, lookup_checked(sc, val));
+              if (slot_value(z) == sc->undefined)
+                {
+                  /* the current environment here contains the function parameters which defaulted to #<undefined>
+                   *   (or maybe #<unused>?) earlier in apply_*_closure_star_1, so (define (f f) (define* (f (f f)) f) (f)) (f 0)
+                   *   looks for the default f, finds itself currently undefined, and raises an error! So, before
+                   *   claiming it is unbound, we need to check outlet as well. But in the case above, the inner
+                   *   define* shadows the caller's parameter before checking the default arg values, so the default f
+                   *   refers to the define* -- I'm not sure this is a bug.  It means that (define* (f (a f)) a)
+                   *   returns f: (equal? f (f)) -> #t, so any outer f needs an extra let and endless outlets:
+                   *   (let ((f 3)) (let () (define* (f (a ((outlet (outlet (outlet (curlet)))) 'f))) a) (f))) -> 3
+                   *   We want the shadowing once the define* is done, so the current mess is simplest.
+                   */
+                  slot_set_value(z, s7_symbol_local_value(sc, val, let_outlet(sc->curlet)));
+                  if (slot_value(z) == sc->undefined)
+                    syntax_error_nr(sc, "lambda* defaults: ~A is unbound", 31, slot_symbol(z));
+                }}
+          else
+            if (!is_pair(val))
+              slot_set_value(z, val);
+            else
+              if (is_quote(car(val)))
+                {
+                  if ((!is_pair(cdr(val))) ||      /* (lambda* ((a (quote))) a) or (lambda* ((a (quote 1 1))) a) etc */
+                      (is_pair(cddr(val))))
+                    syntax_error_nr(sc, "lambda* default: ~A is messed up", 32, val);
+                  slot_set_value(z, cadr(val));
+                }
+              else
+                {
+                  push_stack(sc, OP_LAMBDA_STAR_DEFAULT, z, sc->code);
+                  sc->code = val;
+                  return(true); /* goto eval */
+                }}}
   return(false); /* goto BEGIN */
 }
 
@@ -84953,12 +84953,12 @@ static inline bool apply_safe_closure_star_1(s7_scheme *sc)  /* -------- define*
   if (has_no_defaults(sc->code))
     {
       for (s7_pointer z = let_slots(sc->curlet); tis_slot(z); z = next_slot(z))
-	{
-	  clear_checked_slot(z);
-	  slot_set_value(z, sc->F);
-	}
+        {
+          clear_checked_slot(z);
+          slot_set_value(z, sc->F);
+        }
       if (!is_null(sc->args))
-	lambda_star_set_args(sc);                     /* load up current arg vals */
+        lambda_star_set_args(sc);                     /* load up current arg vals */
       sc->code = closure_body(sc->code);
       return(false); /* goto BEGIN */
     }
@@ -84977,29 +84977,29 @@ static bool apply_unsafe_closure_star_1(s7_scheme *sc)
     {
       s7_pointer car_z = car(z);
       if (is_pair(car_z))           /* arg has a default value */
-	{
-	  s7_pointer slot, val = cadr(car_z);
-	  if ((!is_pair(val)) &&
-	      (!is_symbol(val)))
-	    slot = add_slot_checked(sc, sc->curlet, car(car_z), val);
-	  else
-	    {
-	      add_slot(sc, sc->curlet, car(car_z), sc->undefined);
-	      slot = let_slots(sc->curlet);
-	      slot_set_expression(slot, val);
-	    }
-	  if (is_null(top))
-	    top = slot;
-	}
+        {
+          s7_pointer slot, val = cadr(car_z);
+          if ((!is_pair(val)) &&
+              (!is_symbol(val)))
+            slot = add_slot_checked(sc, sc->curlet, car(car_z), val);
+          else
+            {
+              add_slot(sc, sc->curlet, car(car_z), sc->undefined);
+              slot = let_slots(sc->curlet);
+              slot_set_expression(slot, val);
+            }
+          if (is_null(top))
+            top = slot;
+        }
       else
-	if (!is_keyword(car_z))
-	  add_slot(sc, sc->curlet, car_z, sc->F);
-	else
-	  if (car_z == sc->rest_keyword) /* else it's :allow-other-keys? */
-	    {
-	      set_is_rest_slot(add_slot_checked(sc, sc->curlet, cadr(z), sc->nil));
-	      z = cdr(z);
-	    }}
+        if (!is_keyword(car_z))
+          add_slot(sc, sc->curlet, car_z, sc->F);
+        else
+          if (car_z == sc->rest_keyword) /* else it's :allow-other-keys? */
+            {
+              set_is_rest_slot(add_slot_checked(sc, sc->curlet, cadr(z), sc->nil));
+              z = cdr(z);
+            }}
   if (is_symbol(z))
     set_is_rest_slot(add_slot_checked(sc, sc->curlet, z, sc->nil));     /* set up rest arg */
   let_set_slots(sc->curlet, reverse_slots(let_slots(sc->curlet)));
@@ -85014,16 +85014,16 @@ static void apply_macro_star_1(s7_scheme *sc)
     {
       s7_pointer par = car(p);
       if (is_pair(par))
-	add_slot_checked(sc, sc->curlet, car(par), cadr(par));
+        add_slot_checked(sc, sc->curlet, car(par), cadr(par));
       else
-	if (!is_keyword(par))
-	  add_slot_checked(sc, sc->curlet, par, sc->F);
-	else
-	  if (par == sc->rest_keyword)
-	    {
-	      set_is_rest_slot(add_slot_checked(sc, sc->curlet, cadr(p), sc->nil));
-	      p = cdr(p);
-	    }}
+        if (!is_keyword(par))
+          add_slot_checked(sc, sc->curlet, par, sc->F);
+        else
+          if (par == sc->rest_keyword)
+            {
+              set_is_rest_slot(add_slot_checked(sc, sc->curlet, cadr(p), sc->nil));
+              p = cdr(p);
+            }}
   if (is_symbol(p))
     set_is_rest_slot(add_slot_checked(sc, sc->curlet, p, sc->nil));
   let_set_slots(sc->curlet, reverse_slots(let_slots(sc->curlet)));
@@ -85128,13 +85128,13 @@ static void op_safe_closure_star_a(s7_scheme *sc, s7_pointer code)
   if (is_pair(p))
     for (s7_pointer x = next_slot(let_slots(closure_let(func))); is_pair(p); p = cdr(p), x = next_slot(x))
       {
-	if (is_pair(car(p)))
-	  {
-	    s7_pointer defval = cadar(p);
-	    slot_set_value(x, (is_pair(defval)) ? cadr(defval) : defval);
-	  }
-	else slot_set_value(x, sc->F);
-	symbol_set_local_slot(slot_symbol(x), let_id(sc->curlet), x);
+        if (is_pair(car(p)))
+          {
+            s7_pointer defval = cadar(p);
+            slot_set_value(x, (is_pair(defval)) ? cadr(defval) : defval);
+          }
+        else slot_set_value(x, sc->F);
+        symbol_set_local_slot(slot_symbol(x), let_id(sc->curlet), x);
       }
 }
 
@@ -85156,26 +85156,26 @@ static void op_safe_closure_star_aa(s7_scheme *sc, s7_pointer code)
   if (is_symbol_and_keyword(arg1))
     {
       if (keyword_symbol(arg1) == slot_symbol(let_slots(closure_let(func))))
-	{
-	  arg1 = arg2;
-	  arg2 = cadr(closure_args(func));
-	  if (is_pair(arg2)) arg2 = (is_pair(cadr(arg2))) ? cadadr(arg2) : cadr(arg2); else arg2 = sc->F;
-	}
+        {
+          arg1 = arg2;
+          arg2 = cadr(closure_args(func));
+          if (is_pair(arg2)) arg2 = (is_pair(cadr(arg2))) ? cadadr(arg2) : cadr(arg2); else arg2 = sc->F;
+        }
       else
-	if (keyword_symbol(arg1) == slot_symbol(next_slot(let_slots(closure_let(func)))))
-	  {
-	    arg1 = car(closure_args(func));
-	    if (is_pair(arg1)) arg1 = (is_pair(cadr(arg1))) ? cadadr(arg1) : cadr(arg1); else arg1 = sc->F;
-	  }
-	else
-	  if (!sc->accept_all_keyword_arguments)
-	    error_nr(sc, sc->wrong_type_arg_symbol,
-		     set_elist_4(sc, wrap_string(sc, "~A: unknown keyword argument: ~S in ~S", 38),
-				 closure_name(sc, func), arg1, code));  /* arg1 is already the value */
+        if (keyword_symbol(arg1) == slot_symbol(next_slot(let_slots(closure_let(func)))))
+          {
+            arg1 = car(closure_args(func));
+            if (is_pair(arg1)) arg1 = (is_pair(cadr(arg1))) ? cadadr(arg1) : cadr(arg1); else arg1 = sc->F;
+          }
+        else
+          if (!sc->accept_all_keyword_arguments)
+            error_nr(sc, sc->wrong_type_arg_symbol,
+                     set_elist_4(sc, wrap_string(sc, "~A: unknown keyword argument: ~S in ~S", 38),
+                                 closure_name(sc, func), arg1, code));  /* arg1 is already the value */
     }
   else
     if ((is_symbol_and_keyword(arg2)) &&
-	(!sc->accept_all_keyword_arguments))
+        (!sc->accept_all_keyword_arguments))
       error_nr(sc, sc->wrong_type_arg_symbol, set_elist_4(sc, keyword_value_missing_string, closure_name(sc, func), arg2, code));
   set_curlet(sc, update_let_with_two_slots(sc, closure_let(func), arg1, arg2));
   sc->code = T_Pair(closure_body(func));
@@ -85264,7 +85264,7 @@ static void op_closure_star_a(s7_scheme *sc, s7_pointer code)
   if ((is_symbol_and_keyword(sc->value)) &&
       (!sc->accept_all_keyword_arguments))
     error_nr(sc, sc->wrong_type_arg_symbol,
-	     set_elist_4(sc, keyword_value_missing_string, closure_name(sc, opt1_lambda(code)), sc->value, code));
+             set_elist_4(sc, keyword_value_missing_string, closure_name(sc, opt1_lambda(code)), sc->value, code));
   p = car(closure_args(func));
   set_curlet(sc, make_let_with_slot(sc, closure_let(func), (is_pair(p)) ? car(p) : p, sc->value));
   if (closure_star_arity_to_int(sc, func) > 1)
@@ -85272,12 +85272,12 @@ static void op_closure_star_a(s7_scheme *sc, s7_pointer code)
       s7_pointer last_slot = let_slots(sc->curlet);
       s7_int id = let_id(sc->curlet);
       for (p = cdr(closure_args(func)); is_pair(p); p = cdr(p))
-	{
-	  s7_pointer par = car(p);
-	  if (is_pair(par))
-	    last_slot = add_slot_at_end(sc, id, last_slot, car(par), (is_pair(cadr(par))) ? cadadr(par) : cadr(par)); /* possible quoted list as default value */
-	  else last_slot = add_slot_at_end(sc, id, last_slot, par, sc->F);
-	}}
+        {
+          s7_pointer par = car(p);
+          if (is_pair(par))
+            last_slot = add_slot_at_end(sc, id, last_slot, car(par), (is_pair(cadr(par))) ? cadadr(par) : cadr(par)); /* possible quoted list as default value */
+          else last_slot = add_slot_at_end(sc, id, last_slot, par, sc->F);
+        }}
   sc->code = T_Pair(closure_body(func));
 }
 
@@ -85289,7 +85289,7 @@ static inline bool op_closure_star_na(s7_scheme *sc, s7_pointer code)
       sc->w = cdr(code);               /* args aren't evaluated yet */
       sc->args = make_list(sc, opt3_arglen(cdr(code)), sc->unused);
       for (s7_pointer p = sc->args, old_args = sc->w; is_pair(p); p = cdr(p), old_args = cdr(old_args))
-	set_car(p, fx_call(sc, old_args));
+        set_car(p, fx_call(sc, old_args));
       sc->w = sc->unused;
     }
   else sc->args = sc->nil;
@@ -85323,28 +85323,28 @@ static bool op_define1(s7_scheme *sc)
   s7_pointer x;
   if (is_multiple_value(sc->value))                 /* (define x (values 1 2)) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_5(sc, wrap_string(sc, "~A: more than one value: (~A ~A ~S)", 35),
-			 define1_caller(sc), define1_caller(sc), sc->code, sc->value));
+             set_elist_5(sc, wrap_string(sc, "~A: more than one value: (~A ~A ~S)", 35),
+                         define1_caller(sc), define1_caller(sc), sc->code, sc->value));
   if (is_constant_symbol(sc, sc->code))             /* (define pi 3) or (define (pi a) a) */
     {
       x = (is_slot(global_slot(sc->code))) ? global_slot(sc->code) : s7_slot(sc, sc->code);
       /* local_slot can be free even if sc->code is immutable (local constant now defunct) */
 
       if (!((is_slot(x)) &&
-	    (type(sc->value) == unchecked_type(slot_value(x))) &&
-	    (s7_is_equivalent(sc, sc->value, slot_value(x)))))                                    /* if value is unchanged, just ignore this (re)definition */
-	syntax_error_with_caller_nr(sc, "~A: ~S is immutable", 19, define1_caller(sc), sc->code); /*   can't use s7_is_equal because value might be NaN, etc */
+            (type(sc->value) == unchecked_type(slot_value(x))) &&
+            (s7_is_equivalent(sc, sc->value, slot_value(x)))))                                    /* if value is unchanged, just ignore this (re)definition */
+        syntax_error_with_caller_nr(sc, "~A: ~S is immutable", 19, define1_caller(sc), sc->code); /*   can't use s7_is_equal because value might be NaN, etc */
 
       if ((sc->safety > NO_SAFETY) &&          /* (define-constant x 3) (define x 3)... */
-	  (sc->cur_op == OP_DEFINE))
-	s7_warn(sc, 256, "(define %s %s), but %s is a constant\n", display(sc->code), display(sc->value), display(sc->code));
+          (sc->cur_op == OP_DEFINE))
+        s7_warn(sc, 256, "(define %s %s), but %s is a constant\n", display(sc->code), display(sc->value), display(sc->code));
     }
   else x = s7_slot(sc, sc->code);
   if ((is_slot(x)) && (slot_has_setter(x)))
     {
       sc->value = bind_symbol_with_setter(sc, OP_DEFINE_WITH_SETTER, sc->code, sc->value);
       if (sc->value == sc->no_value)
-	return(true); /* goto apply, if all goes well, OP_DEFINE_WITH_SETTER will jump to DEFINE2 */
+        return(true); /* goto apply, if all goes well, OP_DEFINE_WITH_SETTER will jump to DEFINE2 */
     }
   return(false); /* fall through */
 }
@@ -85354,26 +85354,26 @@ static void set_let_file_and_line(s7_scheme *sc, s7_pointer new_let, s7_pointer
   if (port_file(current_input_port(sc)) != stdin)
     {
       if ((is_pair(closure_args(new_func))) &&
-	  (has_location(closure_args(new_func))))
-	{
-	  let_set_file(new_let, pair_file_number(closure_args(new_func)));
-	  let_set_line(new_let, pair_line_number(closure_args(new_func)));
-	}
+          (has_location(closure_args(new_func))))
+        {
+          let_set_file(new_let, pair_file_number(closure_args(new_func)));
+          let_set_line(new_let, pair_line_number(closure_args(new_func)));
+        }
       else
-	if (has_location(closure_body(new_func)))
-	  {
-	    let_set_file(new_let, pair_file_number(closure_body(new_func)));
-	    let_set_line(new_let, pair_line_number(closure_body(new_func)));
-	  }
-	else
-	  {
-	    s7_pointer p;
-	    for (p = cdr(closure_body(new_func)); is_pair(p); p = cdr(p))
-	      if ((is_pair(car(p))) && (has_location(car(p))))
-		break;
-	    let_set_file(new_let, (is_pair(p)) ? pair_file_number(car(p)) : port_file_number(current_input_port(sc)));
-	    let_set_line(new_let, (is_pair(p)) ? pair_line_number(car(p)) : port_line_number(current_input_port(sc)));
-	  }
+        if (has_location(closure_body(new_func)))
+          {
+            let_set_file(new_let, pair_file_number(closure_body(new_func)));
+            let_set_line(new_let, pair_line_number(closure_body(new_func)));
+          }
+        else
+          {
+            s7_pointer p;
+            for (p = cdr(closure_body(new_func)); is_pair(p); p = cdr(p))
+              if ((is_pair(car(p))) && (has_location(car(p))))
+                break;
+            let_set_file(new_let, (is_pair(p)) ? pair_file_number(car(p)) : port_file_number(current_input_port(sc)));
+            let_set_line(new_let, (is_pair(p)) ? pair_line_number(car(p)) : port_line_number(current_input_port(sc)));
+          }
       set_has_let_file(new_let);
     }
   else
@@ -85397,11 +85397,11 @@ static void op_define_with_setter(s7_scheme *sc)
     {
       s7_pointer new_func = sc->value, new_let;
       if (is_safe_closure_body(closure_body(new_func)))
-	{
-	  set_safe_closure(new_func);
-	  if (is_very_safe_closure_body(closure_body(new_func)))
-	    set_very_safe_closure(new_func);
-	}
+        {
+          set_safe_closure(new_func);
+          if (is_very_safe_closure_body(closure_body(new_func)))
+            set_very_safe_closure(new_func);
+        }
       new_let = make_funclet(sc, new_func, code, closure_let(new_func));
 
       /* this should happen only if the closure* default values do not refer in any way to
@@ -85412,68 +85412,68 @@ static void op_define_with_setter(s7_scheme *sc)
       set_let_file_and_line(sc, new_let, new_func);
       /* add the newly defined thing to the current environment */
       if ((is_let(sc->curlet)) && (sc->curlet != sc->rootlet))
-	{
-	  if (let_id(sc->curlet) <= symbol_id(code)) /* we're adding a later-bound symbol to an old let (?) */
-	    {                                        /* was < 16-Aug-22: (let ((a 3)) (define (a) 4) (curlet)) */
-	      s7_pointer slot;
-	      sc->let_number++; /* dummy let, force symbol lookup */
-	      for (slot = let_slots(sc->curlet); tis_slot(slot); slot = next_slot(slot))
-		if (slot_symbol(slot) == code)
-		  {
-		    if (is_immutable_slot(slot))
-		      syntax_error_nr(sc, "define ~S, but it is immutable", 30, code); /* someday give the location of the immutable definition or setting */
-		    slot_set_value(slot, new_func);
-		    symbol_set_local_slot(code, sc->let_number, slot);
-		    set_local(code);
-		    sc->value = new_func; /* probably not needed? */
-		    return;
-		  }
-	      new_cell_no_check(sc, slot, T_SLOT);
-	      slot_set_symbol_and_value(slot, code, new_func);
-	      symbol_set_local_slot(code, sc->let_number, slot);
-	      slot_set_next(slot, let_slots(sc->curlet));
-	      let_set_slots(sc->curlet, slot);
-	    }
-	  else add_slot(sc, sc->curlet, code, new_func);
-	  set_local(code);
-	}
+        {
+          if (let_id(sc->curlet) <= symbol_id(code)) /* we're adding a later-bound symbol to an old let (?) */
+            {                                        /* was < 16-Aug-22: (let ((a 3)) (define (a) 4) (curlet)) */
+              s7_pointer slot;
+              sc->let_number++; /* dummy let, force symbol lookup */
+              for (slot = let_slots(sc->curlet); tis_slot(slot); slot = next_slot(slot))
+                if (slot_symbol(slot) == code)
+                  {
+                    if (is_immutable_slot(slot))
+                      syntax_error_nr(sc, "define ~S, but it is immutable", 30, code); /* someday give the location of the immutable definition or setting */
+                    slot_set_value(slot, new_func);
+                    symbol_set_local_slot(code, sc->let_number, slot);
+                    set_local(code);
+                    sc->value = new_func; /* probably not needed? */
+                    return;
+                  }
+              new_cell_no_check(sc, slot, T_SLOT);
+              slot_set_symbol_and_value(slot, code, new_func);
+              symbol_set_local_slot(code, sc->let_number, slot);
+              slot_set_next(slot, let_slots(sc->curlet));
+              let_set_slots(sc->curlet, slot);
+            }
+          else add_slot(sc, sc->curlet, code, new_func);
+          set_local(code);
+        }
       else
-	{
-	  if ((is_slot(global_slot(code))) &&
-	      (is_immutable_slot(global_slot(code))))
-	    {
-	      s7_pointer old_symbol = code, old_value = global_value(code);
-	      if ((type(old_value) != type(new_func)) ||
-		  (!s7_is_equivalent(sc, old_value, new_func)))    /* if value is unchanged, just ignore this (re)definition */
-		syntax_error_nr(sc, "define ~S, but it is immutable", 30, old_symbol);
-	    }
-	  else s7_make_slot(sc, sc->curlet, code, new_func);
-	}
+        {
+          if ((is_slot(global_slot(code))) &&
+              (is_immutable_slot(global_slot(code))))
+            {
+              s7_pointer old_symbol = code, old_value = global_value(code);
+              if ((type(old_value) != type(new_func)) ||
+                  (!s7_is_equivalent(sc, old_value, new_func)))    /* if value is unchanged, just ignore this (re)definition */
+                syntax_error_nr(sc, "define ~S, but it is immutable", 30, old_symbol);
+            }
+          else s7_make_slot(sc, sc->curlet, code, new_func);
+        }
       sc->value = new_func; /* 25-Jul-14 so define returns the value not the name */
     }
   else
     {
       s7_pointer slot = symbol_to_local_slot(sc, code, sc->curlet);
       if (is_slot(slot))
-	{
-	  if (is_immutable_slot(slot))
-	    {
-	      s7_pointer old_symbol = code, old_value = slot_value(slot);
-	      if ((type(old_value) != type(sc->value)) ||
-		  (!s7_is_equivalent(sc, old_value, sc->value)))    /* if value is unchanged, just ignore this (re)definition */
-		syntax_error_nr(sc, "define ~S, but it is immutable", 30, old_symbol);
-	    }
-	  else
-	    {
-	      slot_set_value_with_hook(slot, sc->value);
-	      symbol_increment_ctr(code);
-	    }}
+        {
+          if (is_immutable_slot(slot))
+            {
+              s7_pointer old_symbol = code, old_value = slot_value(slot);
+              if ((type(old_value) != type(sc->value)) ||
+                  (!s7_is_equivalent(sc, old_value, sc->value)))    /* if value is unchanged, just ignore this (re)definition */
+                syntax_error_nr(sc, "define ~S, but it is immutable", 30, old_symbol);
+            }
+          else
+            {
+              slot_set_value_with_hook(slot, sc->value);
+              symbol_increment_ctr(code);
+            }}
       else s7_make_slot(sc, sc->curlet, code, sc->value);
       if ((is_any_macro(sc->value)) && (!is_c_macro(sc->value)))
-	{
-	  set_pair_macro(closure_body(sc->value), code);
-	  set_has_pair_macro(sc->value);
-	}}
+        {
+          set_pair_macro(closure_body(sc->value), code);
+          set_has_pair_macro(sc->value);
+        }}
 }
 
 
@@ -85762,20 +85762,20 @@ static void op_any_closure_3p(s7_scheme *sc)
       sc->args = fx_call(sc, p);
       p = cdr(p);
       if (has_fx(p))
-	{
-	  stack_end_code(sc) = sc->code; /* push_stack_direct(sc, OP_ANY_CLOSURE_3P_3) here but trying to be too clever? */
-	  stack_end_args(sc) = sc->args; /* stack[args] == arg1 to closure) */
-	  stack_end_op(sc) = (s7_pointer)(opcode_t)(OP_ANY_CLOSURE_3P_3);
-	  sc->stack_end += 4;
-	  set_stack_protected3_with(sc, fx_call(sc, p), OP_ANY_CLOSURE_3P_3);
-	  /* (i.e. stack[curlet] == arg2 of closure), fx_call might push_stack gc_protect etc, so push_stack via +4 before it */
-	  sc->code = cadr(p);
-	}
+        {
+          stack_end_code(sc) = sc->code; /* push_stack_direct(sc, OP_ANY_CLOSURE_3P_3) here but trying to be too clever? */
+          stack_end_args(sc) = sc->args; /* stack[args] == arg1 to closure) */
+          stack_end_op(sc) = (s7_pointer)(opcode_t)(OP_ANY_CLOSURE_3P_3);
+          sc->stack_end += 4;
+          set_stack_protected3_with(sc, fx_call(sc, p), OP_ANY_CLOSURE_3P_3);
+          /* (i.e. stack[curlet] == arg2 of closure), fx_call might push_stack gc_protect etc, so push_stack via +4 before it */
+          sc->code = cadr(p);
+        }
       else
-	{
-	  push_stack_direct(sc, OP_ANY_CLOSURE_3P_2); /* arg1 == stack[args] */
-	  sc->code = car(p);
-	}}
+        {
+          push_stack_direct(sc, OP_ANY_CLOSURE_3P_2); /* arg1 == stack[args] */
+          sc->code = car(p);
+        }}
   else
     {
       push_stack_no_args_direct(sc, OP_ANY_CLOSURE_3P_1);
@@ -85791,7 +85791,7 @@ static bool closure_3p_end(s7_scheme *sc, s7_pointer p)
       gc_protect_2_via_stack(sc, sc->args, sc->value); /* sc->args == arg1, sc->value == arg2 */
       set_stack_protected3(sc, fx_call(sc, p));
       if (is_safe_closure(func))
-	set_curlet(sc, update_let_with_three_slots(sc, closure_let(func), stack_protected1(sc), stack_protected2(sc), stack_protected3(sc)));
+        set_curlet(sc, update_let_with_three_slots(sc, closure_let(func), stack_protected1(sc), stack_protected2(sc), stack_protected3(sc)));
       else make_let_with_three_slots(sc, func, stack_protected1(sc), stack_protected2(sc), stack_protected3(sc));
       unstack_gc_protect(sc);
       sc->code = T_Pair(closure_body(func));
@@ -85838,26 +85838,26 @@ static void op_any_closure_4p(s7_scheme *sc)
       gc_protect_via_stack(sc, fx_call(sc, p));
       p = cdr(p);
       if (has_fx(p))
-	{
-	  set_stack_protected2(sc, fx_call(sc, p));
-	  p = cdr(p);
-	  if (has_fx(p))
-	    {
-	      set_stack_protected3(sc, fx_call(sc, p));
-	      push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_4);
-	      sc->code = cadr(p);
-	    }
-	  else
-	    {
-	      push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_3);
-	      sc->code = car(p);
-	    }}
+        {
+          set_stack_protected2(sc, fx_call(sc, p));
+          p = cdr(p);
+          if (has_fx(p))
+            {
+              set_stack_protected3(sc, fx_call(sc, p));
+              push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_4);
+              sc->code = cadr(p);
+            }
+          else
+            {
+              push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_3);
+              sc->code = car(p);
+            }}
       else
-	{
-	  stack_end_args(sc) = sc->unused; /* copy_stack dangling pair */
-	  push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_2);
-	  sc->code = car(p);
-	}}
+        {
+          stack_end_args(sc) = sc->unused; /* copy_stack dangling pair */
+          push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_2);
+          sc->code = car(p);
+        }}
   else
     {
       push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_1);
@@ -85872,7 +85872,7 @@ static bool closure_4p_end(s7_scheme *sc, s7_pointer p)
       s7_pointer func = opt1_lambda(sc->code);
       sc->args = fx_call(sc, p);
       if (is_safe_closure(func))
-	set_curlet(sc, update_let_with_four_slots(sc, closure_let(func), stack_protected1(sc), stack_protected2(sc), stack_protected3(sc), sc->args));
+        set_curlet(sc, update_let_with_four_slots(sc, closure_let(func), stack_protected1(sc), stack_protected2(sc), stack_protected3(sc), sc->args));
       else make_let_with_four_slots(sc, func, stack_protected1(sc), stack_protected2(sc), stack_protected3(sc), sc->args);
       sc->code = T_Pair(closure_body(func));
       unstack_gc_protect(sc);
@@ -85892,10 +85892,10 @@ static bool op_any_closure_4p_1(s7_scheme *sc)
       set_stack_protected2(sc, fx_call(sc, p));
       p = cdr(p);
       if (has_fx(p))
-	{
-	  set_stack_protected3(sc, fx_call(sc, p));
-	  return(closure_4p_end(sc, cdr(p)));
-	}
+        {
+          set_stack_protected3(sc, fx_call(sc, p));
+          return(closure_4p_end(sc, cdr(p)));
+        }
       push_stack_no_args_direct(sc, OP_ANY_CLOSURE_4P_3);
       sc->code = car(p);
     }
@@ -85958,8 +85958,8 @@ static inline void op_closure_ss(s7_scheme *sc)
   s7_pointer f = opt1_lambda(sc->code);
   check_stack_size(sc);
   set_curlet(sc, inline_make_let_with_two_slots(sc, closure_let(f),
-					        car(closure_args(f)), lookup(sc, cadr(sc->code)),
-					        cadr(closure_args(f)), lookup(sc, opt2_sym(sc->code))));
+                                                car(closure_args(f)), lookup(sc, cadr(sc->code)),
+                                                cadr(closure_args(f)), lookup(sc, opt2_sym(sc->code))));
   sc->code = T_Pair(closure_body(f));
   push_stack_no_args(sc, sc->begin_op, T_Pair(cdr(sc->code)));
   sc->code = car(sc->code);
@@ -85969,8 +85969,8 @@ static inline void op_closure_ss_o(s7_scheme *sc)
 {
   s7_pointer f = opt1_lambda(sc->code);
   set_curlet(sc, inline_make_let_with_two_slots(sc, closure_let(f),
-					        car(closure_args(f)), lookup(sc, cadr(sc->code)),
-					        cadr(closure_args(f)), lookup(sc, opt2_sym(sc->code))));
+                                                car(closure_args(f)), lookup(sc, cadr(sc->code)),
+                                                cadr(closure_args(f)), lookup(sc, opt2_sym(sc->code))));
   sc->code = car(closure_body(f));
 }
 
@@ -86308,14 +86308,14 @@ static bool check_closure_sym(s7_scheme *sc, int32_t args)
     {
       s7_pointer f = lookup_unexamined(sc, car(sc->code));
       if ((f != opt1_lambda_unchecked(sc->code)) &&
-	  ((!f) ||
-	   ((low_type_bits(f) & (TYPE_MASK | T_SAFE_CLOSURE)) != T_CLOSURE) ||
-	   (((args == 1) && (!is_symbol(closure_args(f)))) ||
-	    ((args == 2) && ((!is_pair(closure_args(f))) || (!is_symbol(cdr(closure_args(f)))))))))
-	{
-	  sc->last_function = f;
-	  return(false);
-	}
+          ((!f) ||
+           ((low_type_bits(f) & (TYPE_MASK | T_SAFE_CLOSURE)) != T_CLOSURE) ||
+           (((args == 1) && (!is_symbol(closure_args(f)))) ||
+            ((args == 2) && ((!is_pair(closure_args(f))) || (!is_symbol(cdr(closure_args(f)))))))))
+        {
+          sc->last_function = f;
+          return(false);
+        }
       set_opt1_lambda(sc->code, f);
     }
   return(true);
@@ -86328,28 +86328,28 @@ static void op_any_closure_sym(s7_scheme *sc) /* for (lambda a ...) */
 
   if (num_args == 1)
     set_curlet(sc, inline_make_let_with_slot(sc, closure_let(func), closure_args(func),
-					     ((is_safe_closure(func)) && (!sc->debug_or_profile)) ?
-					     set_plist_1(sc, fx_call(sc, old_args)) : list_1(sc, sc->value = fx_call(sc, old_args))));
+                                             ((is_safe_closure(func)) && (!sc->debug_or_profile)) ?
+                                             set_plist_1(sc, fx_call(sc, old_args)) : list_1(sc, sc->value = fx_call(sc, old_args))));
   else
     if (num_args == 2)
       {
-	gc_protect_via_stack(sc, fx_call(sc, old_args)); /* not sc->value as GC protection! -- fx_call below can clobber it */
-	sc->args = fx_call(sc, cdr(old_args));
-	set_curlet(sc, inline_make_let_with_slot(sc, closure_let(func), closure_args(func),
-					         ((is_safe_closure(func)) && (!sc->debug_or_profile)) ?
-					         set_plist_2(sc, stack_protected1(sc), sc->args) : list_2(sc, stack_protected1(sc), sc->args)));
-	unstack_gc_protect(sc);
+        gc_protect_via_stack(sc, fx_call(sc, old_args)); /* not sc->value as GC protection! -- fx_call below can clobber it */
+        sc->args = fx_call(sc, cdr(old_args));
+        set_curlet(sc, inline_make_let_with_slot(sc, closure_let(func), closure_args(func),
+                                                 ((is_safe_closure(func)) && (!sc->debug_or_profile)) ?
+                                                 set_plist_2(sc, stack_protected1(sc), sc->args) : list_2(sc, stack_protected1(sc), sc->args)));
+        unstack_gc_protect(sc);
       }
     else
       if (num_args == 0)
-	set_curlet(sc, inline_make_let_with_slot(sc, closure_let(func), closure_args(func), sc->nil));
+        set_curlet(sc, inline_make_let_with_slot(sc, closure_let(func), closure_args(func), sc->nil));
       else
-	{
-	  sc->args = make_list(sc, num_args, sc->unused);
-	  for (s7_pointer p = sc->args; is_pair(p); p = cdr(p), old_args = cdr(old_args))
-	    set_car(p, fx_call(sc, old_args));
-	  set_curlet(sc, make_let_with_slot(sc, closure_let(func), closure_args(func), sc->args));
-	}
+        {
+          sc->args = make_list(sc, num_args, sc->unused);
+          for (s7_pointer p = sc->args; is_pair(p); p = cdr(p), old_args = cdr(old_args))
+            set_car(p, fx_call(sc, old_args));
+          set_curlet(sc, make_let_with_slot(sc, closure_let(func), closure_args(func), sc->args));
+        }
   sc->code = T_Pair(closure_body(func));
 }
 
@@ -86365,18 +86365,18 @@ static void op_any_closure_a_sym(s7_scheme *sc) /* for (lambda (a . b) ...) */
     {
       gc_protect_via_stack(sc, fx_call(sc, old_args)); /* not sc->value as GC protection! -- fx_call below can clobber it */
       if (num_args == 2)
-	{
-	  sc->args = fx_call(sc, cdr(old_args));
-	  set_curlet(sc, inline_make_let_with_two_slots(sc, closure_let(func), car(func_args), stack_protected1(sc), cdr(func_args), list_1(sc, sc->args)));
-	}
+        {
+          sc->args = fx_call(sc, cdr(old_args));
+          set_curlet(sc, inline_make_let_with_two_slots(sc, closure_let(func), car(func_args), stack_protected1(sc), cdr(func_args), list_1(sc, sc->args)));
+        }
       else
-	{
-	  sc->args = make_list(sc, num_args - 1, sc->unused);
-	  old_args = cdr(old_args);
-	  for (s7_pointer p = sc->args; is_pair(p); p = cdr(p), old_args = cdr(old_args))
-	    set_car(p, fx_call(sc, old_args));
-	  set_curlet(sc, make_let_with_two_slots(sc, closure_let(func), car(func_args), stack_protected1(sc), cdr(func_args), sc->args));
-	}
+        {
+          sc->args = make_list(sc, num_args - 1, sc->unused);
+          old_args = cdr(old_args);
+          for (s7_pointer p = sc->args; is_pair(p); p = cdr(p), old_args = cdr(old_args))
+            set_car(p, fx_call(sc, old_args));
+          set_curlet(sc, make_let_with_two_slots(sc, closure_let(func), car(func_args), stack_protected1(sc), cdr(func_args), sc->args));
+        }
       unstack_gc_protect(sc);
     }
   sc->code = T_Pair(closure_body(func));
@@ -86418,30 +86418,30 @@ static bool op_tc_case_la(s7_scheme *sc, s7_pointer code)
   if (len == 3)
     {
       while (true)
-	{
-	  s7_pointer selector = fx_call(sc, selp);
-	  if (selector == opt1_any(clauses))
-	    endp = opt2_any(clauses);
-	  else
-	    {
-	      s7_pointer p = cdr(clauses);
-	      endp = (selector == opt1_any(p)) ? opt2_any(p) : opt2_any(cdr(p));
-	    }
-	  if (has_tc(endp))
-	    slot_set_value(la_slot, fx_call(sc, cdr(endp)));
-	  else break;
-	}}
+        {
+          s7_pointer selector = fx_call(sc, selp);
+          if (selector == opt1_any(clauses))
+            endp = opt2_any(clauses);
+          else
+            {
+              s7_pointer p = cdr(clauses);
+              endp = (selector == opt1_any(p)) ? opt2_any(p) : opt2_any(cdr(p));
+            }
+          if (has_tc(endp))
+            slot_set_value(la_slot, fx_call(sc, cdr(endp)));
+          else break;
+        }}
   else
     while (true)
       {
-	s7_pointer p, selector = fx_call(sc, selp);
-	for (p = clauses; is_pair(cdr(p)); p = cdr(p))
-	  if (selector == opt1_any(p)) {endp = opt2_any(p); goto CASE_ALA_END;}
-	endp = opt2_any(p);
+        s7_pointer p, selector = fx_call(sc, selp);
+        for (p = clauses; is_pair(cdr(p)); p = cdr(p))
+          if (selector == opt1_any(p)) {endp = opt2_any(p); goto CASE_ALA_END;}
+        endp = opt2_any(p);
       CASE_ALA_END:
-	if (has_tc(endp))
-	  slot_set_value(la_slot, fx_call(sc, cdr(endp)));
-	else break;
+        if (has_tc(endp))
+          slot_set_value(la_slot, fx_call(sc, cdr(endp)));
+        else break;
       }
   if (has_fx(endp))
     {
@@ -86550,8 +86550,8 @@ static void op_tc_or_a_and_a_a_la(s7_scheme *sc, s7_pointer code)
       s7_pointer p = fx_call(sc, fx_or);
       if (p != sc->F) {sc->value = p; return;}
       if ((fx_call(sc, fx_and1) == sc->F) ||
-	  (fx_call(sc, fx_and2) == sc->F))
-	{sc->value = sc->F; return;}
+          (fx_call(sc, fx_and2) == sc->F))
+        {sc->value = sc->F; return;}
       slot_set_value(la_slot, fx_call(sc, fx_la));
     }
 }
@@ -86602,12 +86602,12 @@ static void op_tc_and_a_or_a_laa(s7_scheme *sc, s7_pointer code)
     {
       s7_pointer la_val = slot_value(la_slot), laa_val = slot_value(laa_slot);
       while (true)
-	{
-	  if (is_null(laa_val)) {sc->value = sc->F; return;}
-	  if (is_null(la_val)) {sc->value = sc->T; return;}
-	  la_val = cdr(la_val);
-	  laa_val = cdr(laa_val);
-	}}
+        {
+          if (is_null(laa_val)) {sc->value = sc->F; return;}
+          if (is_null(la_val)) {sc->value = sc->T; return;}
+          la_val = cdr(la_val);
+          laa_val = cdr(laa_val);
+        }}
   while (true)
     {
       s7_pointer p;
@@ -86732,16 +86732,16 @@ static void op_tc_or_a_and_a_a_l3a(s7_scheme *sc, s7_pointer code)
       fx_and1 = cdar(fx_and1);
       fx_and2 = cdar(fx_and2);
       while (true)
-	{
-	  s7_pointer p = fx_call(sc, fx_or);
-	  if (p != sc->F) {sc->value = p; return;}
-	  if ((fx_call(sc, fx_and1) != sc->F) || (fx_call(sc, fx_and2) != sc->F)) {sc->value = sc->F; return;}
-	  sc->rec_p1 = fx_call(sc, fx_la);
-	  sc->rec_p2 = fx_call(sc, fx_laa);
-	  slot_set_value(l3a_slot, fx_call(sc, fx_l3a));
-	  slot_set_value(la_slot, sc->rec_p1);
-	  slot_set_value(laa_slot, sc->rec_p2);
-	}}
+        {
+          s7_pointer p = fx_call(sc, fx_or);
+          if (p != sc->F) {sc->value = p; return;}
+          if ((fx_call(sc, fx_and1) != sc->F) || (fx_call(sc, fx_and2) != sc->F)) {sc->value = sc->F; return;}
+          sc->rec_p1 = fx_call(sc, fx_la);
+          sc->rec_p2 = fx_call(sc, fx_laa);
+          slot_set_value(l3a_slot, fx_call(sc, fx_l3a));
+          slot_set_value(la_slot, sc->rec_p1);
+          slot_set_value(laa_slot, sc->rec_p2);
+        }}
   while (true)
     {
       s7_pointer p = fx_call(sc, fx_or);
@@ -86774,15 +86774,15 @@ static bool op_tc_if_a_z_la(s7_scheme *sc, s7_pointer code, bool cond)
     {
       sc->pc = 0;
       if (bool_optimize(sc, if_test))
-	{
-	  opt_info *o = sc->opts[0], *o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, la))
-	    {
-	      s7_pointer val = make_mutable_integer(sc, integer(slot_value(la_slot)));
-	      slot_set_value(la_slot, val);
-	      while (!(o->v[0].fb(o))){set_integer(val, o1->v[0].fi(o1));}
-	      return(op_tc_z(sc, if_true));
-	    }}}
+        {
+          opt_info *o = sc->opts[0], *o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, la))
+            {
+              s7_pointer val = make_mutable_integer(sc, integer(slot_value(la_slot)));
+              slot_set_value(la_slot, val);
+              while (!(o->v[0].fb(o))){set_integer(val, o1->v[0].fi(o1));}
+              return(op_tc_z(sc, if_true));
+            }}}
   while (fx_call(sc, if_test) == sc->F) {slot_set_value(la_slot, fx_call(sc, la));}
   return(op_tc_z(sc, if_true));
 }
@@ -86811,15 +86811,15 @@ static bool op_tc_if_a_la_z(s7_scheme *sc, s7_pointer code, bool cond)
     {
       sc->pc = 0;
       if (bool_optimize(sc, if_test))
-	{
-	  opt_info *o = sc->opts[0], *o1 = sc->opts[sc->pc];
-	  if (int_optimize(sc, la))
-	    {
-	      s7_pointer val = make_mutable_integer(sc, integer(slot_value(la_slot)));
-	      slot_set_value(la_slot, val);
-	      while (o->v[0].fb(o)) {set_integer(val, o1->v[0].fi(o1));}
-	      return(op_tc_z(sc, if_false));
-	    }}}
+        {
+          opt_info *o = sc->opts[0], *o1 = sc->opts[sc->pc];
+          if (int_optimize(sc, la))
+            {
+              s7_pointer val = make_mutable_integer(sc, integer(slot_value(la_slot)));
+              slot_set_value(la_slot, val);
+              while (o->v[0].fb(o)) {set_integer(val, o1->v[0].fi(o1));}
+              return(op_tc_z(sc, if_false));
+            }}}
   while (fx_call(sc, if_test) != sc->F) {slot_set_value(la_slot, fx_call(sc, la));}
   return(op_tc_z(sc, if_false));
 }
@@ -86863,85 +86863,85 @@ static bool op_tc_if_a_z_laa(s7_scheme *sc, s7_pointer code, bool z_first, tc_ch
     {
       sc->pc = 0;
       if (bool_optimize(sc, if_test))
-	{
-	  opt_info *o = sc->opts[0], *o1 = sc->opts[sc->pc], *o2;
-	  int32_t start_pc = sc->pc;
-	  if ((is_t_integer(slot_value(la_slot))) &&
-	      (is_t_integer(slot_value(laa_slot))))
-	    {
-	      if (int_optimize(sc, la))
-		{
-		  o2 = sc->opts[sc->pc];
-		  if (int_optimize(sc, laa))
-		    {
-		      s7_int (*fi1)(opt_info *o) = o1->v[0].fi;
-		      s7_int (*fi2)(opt_info *o) = o2->v[0].fi;
-		      bool (*fb)(opt_info *o) = o->v[0].fb;
-		      s7_pointer val1 = make_mutable_integer(sc, integer(slot_value(la_slot)));
-		      s7_pointer val2;
-		      slot_set_value(la_slot, val1);
-		      slot_set_value(laa_slot, val2 = make_mutable_integer(sc, integer(slot_value(laa_slot))));
-		      if ((z_first) &&
-			  ((fb == opt_b_ii_sc_lt) || (fb == opt_b_ii_sc_lt_0)) &&
-			  (fi1 == opt_i_ii_sc_sub))
-			{
-			  s7_int lim = o->v[2].i, m = o1->v[2].i;
-			  s7_pointer slot1 = o->v[1].p, slot2 = o1->v[1].p;
-			  while (integer(slot_value(slot1)) >= lim)
-			    {
-			      s7_int i1 = integer(slot_value(slot2)) - m;
-			      set_integer(val2, fi2(o2));
-			      set_integer(val1, i1);
-			    }}
-		      else
-			while (fb(o) != z_first)
-			  {
-			    s7_int i1 = fi1(o1);
-			    set_integer(val2, fi2(o2));
-			    set_integer(val1, i1);
-			  }
-		      return(op_tc_z(sc, if_z));
-		    }}}
-
-	  if ((is_t_real(slot_value(la_slot))) &&
-	      (is_t_real(slot_value(laa_slot))))
-	    {
-	      sc->pc = start_pc;
-	      if (float_optimize(sc, la))
-		{
-		  o2 = sc->opts[sc->pc];
-		  if (float_optimize(sc, laa))
-		    {
-		      s7_double (*fd1)(opt_info *o) = o1->v[0].fd;
-		      s7_double (*fd2)(opt_info *o) = o2->v[0].fd;
-		      bool (*fb)(opt_info *o) = o->v[0].fb;
-		      s7_pointer val1 = make_mutable_real(sc, real(slot_value(la_slot)));
-		      s7_pointer val2 = make_mutable_real(sc, real(slot_value(laa_slot)));
-		      slot_set_value(la_slot, val1);
-		      slot_set_value(laa_slot, val2);
-		      if ((z_first) &&
-			  (fb == opt_b_dd_sc_lt) &&
-			  (fd1 == opt_d_dd_sc_sub))
-			{
-			  s7_double lim = o->v[2].x;
-			  s7_double m = o1->v[2].x;
-			  s7_pointer slot1 = o->v[1].p;
-			  s7_pointer slot2 = o1->v[1].p;
-			  while (real(slot_value(slot1)) >= lim)
-			    {
-			      s7_double x1 = real(slot_value(slot2)) - m;
-			      set_real(val2, fd2(o2));
-			      set_real(val1, x1);
-			    }}
-		      else
-			while (fb(o) != z_first)
-			  {
-			    s7_double x1 = fd1(o1);
-			    set_real(val2, fd2(o2));
-			    set_real(val1, x1);
-			  }
-		      return(op_tc_z(sc, if_z));
-		    }}}}
+        {
+          opt_info *o = sc->opts[0], *o1 = sc->opts[sc->pc], *o2;
+          int32_t start_pc = sc->pc;
+          if ((is_t_integer(slot_value(la_slot))) &&
+              (is_t_integer(slot_value(laa_slot))))
+            {
+              if (int_optimize(sc, la))
+                {
+                  o2 = sc->opts[sc->pc];
+                  if (int_optimize(sc, laa))
+                    {
+                      s7_int (*fi1)(opt_info *o) = o1->v[0].fi;
+                      s7_int (*fi2)(opt_info *o) = o2->v[0].fi;
+                      bool (*fb)(opt_info *o) = o->v[0].fb;
+                      s7_pointer val1 = make_mutable_integer(sc, integer(slot_value(la_slot)));
+                      s7_pointer val2;
+                      slot_set_value(la_slot, val1);
+                      slot_set_value(laa_slot, val2 = make_mutable_integer(sc, integer(slot_value(laa_slot))));
+                      if ((z_first) &&
+                          ((fb == opt_b_ii_sc_lt) || (fb == opt_b_ii_sc_lt_0)) &&
+                          (fi1 == opt_i_ii_sc_sub))
+                        {
+                          s7_int lim = o->v[2].i, m = o1->v[2].i;
+                          s7_pointer slot1 = o->v[1].p, slot2 = o1->v[1].p;
+                          while (integer(slot_value(slot1)) >= lim)
+                            {
+                              s7_int i1 = integer(slot_value(slot2)) - m;
+                              set_integer(val2, fi2(o2));
+                              set_integer(val1, i1);
+                            }}
+                      else
+                        while (fb(o) != z_first)
+                          {
+                            s7_int i1 = fi1(o1);
+                            set_integer(val2, fi2(o2));
+                            set_integer(val1, i1);
+                          }
+                      return(op_tc_z(sc, if_z));
+                    }}}
+
+          if ((is_t_real(slot_value(la_slot))) &&
+              (is_t_real(slot_value(laa_slot))))
+            {
+              sc->pc = start_pc;
+              if (float_optimize(sc, la))
+                {
+                  o2 = sc->opts[sc->pc];
+                  if (float_optimize(sc, laa))
+                    {
+                      s7_double (*fd1)(opt_info *o) = o1->v[0].fd;
+                      s7_double (*fd2)(opt_info *o) = o2->v[0].fd;
+                      bool (*fb)(opt_info *o) = o->v[0].fb;
+                      s7_pointer val1 = make_mutable_real(sc, real(slot_value(la_slot)));
+                      s7_pointer val2 = make_mutable_real(sc, real(slot_value(laa_slot)));
+                      slot_set_value(la_slot, val1);
+                      slot_set_value(laa_slot, val2);
+                      if ((z_first) &&
+                          (fb == opt_b_dd_sc_lt) &&
+                          (fd1 == opt_d_dd_sc_sub))
+                        {
+                          s7_double lim = o->v[2].x;
+                          s7_double m = o1->v[2].x;
+                          s7_pointer slot1 = o->v[1].p;
+                          s7_pointer slot2 = o1->v[1].p;
+                          while (real(slot_value(slot1)) >= lim)
+                            {
+                              s7_double x1 = real(slot_value(slot2)) - m;
+                              set_real(val2, fd2(o2));
+                              set_real(val1, x1);
+                            }}
+                      else
+                        while (fb(o) != z_first)
+                          {
+                            s7_double x1 = fd1(o1);
+                            set_real(val2, fd2(o2));
+                            set_real(val1, x1);
+                          }
+                      return(op_tc_z(sc, if_z));
+                    }}}}
       set_no_bool_opt(code);
     }
 #endif
@@ -86950,28 +86950,28 @@ static bool op_tc_if_a_z_laa(s7_scheme *sc, s7_pointer code, bool z_first, tc_ch
   if (z_first)
     {
       if ((fx_proc(la) == fx_cdr_t) && (fx_proc(laa) == fx_subtract_u1) &&
-	  (fn_proc(if_test) == g_num_eq_xi) &&  /* was also (fx_proc(if_test) == fx_num_eq_ui) but we cloberred if_test above */
-	  (is_pair(slot_value(la_slot))) && (is_t_integer(slot_value(laa_slot))))
-	{ /* list-tail ferchrissake */
-	  s7_int end = integer(caddr(if_test));
-	  s7_pointer lst = slot_value(la_slot);
-	  for (s7_int start = integer(slot_value(laa_slot)); start > end; start--)
-	    lst = cdr(lst);
-	  slot_set_value(la_slot, lst);
-	}
+          (fn_proc(if_test) == g_num_eq_xi) &&  /* was also (fx_proc(if_test) == fx_num_eq_ui) but we cloberred if_test above */
+          (is_pair(slot_value(la_slot))) && (is_t_integer(slot_value(laa_slot))))
+        { /* list-tail ferchrissake */
+          s7_int end = integer(caddr(if_test));
+          s7_pointer lst = slot_value(la_slot);
+          for (s7_int start = integer(slot_value(laa_slot)); start > end; start--)
+            lst = cdr(lst);
+          slot_set_value(la_slot, lst);
+        }
       else
-	while (tf(sc, if_test) == sc->F)
-	  {
-	    sc->rec_p1 = fx_call(sc, la);
-	    slot_set_value(laa_slot, fx_call(sc, laa));
-	    slot_set_value(la_slot, sc->rec_p1);
-	  }}
+        while (tf(sc, if_test) == sc->F)
+          {
+            sc->rec_p1 = fx_call(sc, la);
+            slot_set_value(laa_slot, fx_call(sc, laa));
+            slot_set_value(la_slot, sc->rec_p1);
+          }}
   else
     while (tf(sc, if_test) != sc->F)
       {
-	sc->rec_p1 = fx_call(sc, la);
-	slot_set_value(laa_slot, fx_call(sc, laa));
-	slot_set_value(la_slot, sc->rec_p1);
+        sc->rec_p1 = fx_call(sc, la);
+        slot_set_value(laa_slot, fx_call(sc, laa));
+        slot_set_value(la_slot, sc->rec_p1);
       }
   return(op_tc_z(sc, if_z));
 }
@@ -87156,31 +87156,31 @@ static bool op_tc_if_a_z_if_a_z_la(s7_scheme *sc, s7_pointer code, bool z_first,
       opt_info *o = sc->opts[0];
       sc->pc = 0;
       if (bool_optimize_nw(sc, if_test))
- 	{
-	  opt_info *o1 = sc->opts[sc->pc];
- 	  if (bool_optimize_nw(sc, f_test))
- 	    {
-	      opt_info *o2 = sc->opts[sc->pc];
- 	      if (int_optimize(sc, la))
- 		{
- 		  s7_pointer val = make_mutable_integer(sc, integer(slot_value(la_slot)));
- 		  slot_set_value(la_slot, val);
- 		  if (tc_and)
-		    while (true)
-		      {
-			if (!o->v[0].fb(o)) {sc->value = sc->F; return(true);}
-			if (o1->v[0].fb(o1) == z_first) {endp = f_z; break;}
-			set_integer(val, o2->v[0].fi(o2));
-		      }
- 		  else
-		    while (true)
-		      {
-			if (o->v[0].fb(o)) {endp = if_true; break;}
-			if (o1->v[0].fb(o1) == z_first) {endp = f_z; break;}
-			set_integer(val, o2->v[0].fi(o2));
-		      }
- 		  return(op_tc_z(sc, endp));
- 		}}}}
+         {
+          opt_info *o1 = sc->opts[sc->pc];
+           if (bool_optimize_nw(sc, f_test))
+             {
+              opt_info *o2 = sc->opts[sc->pc];
+               if (int_optimize(sc, la))
+                 {
+                   s7_pointer val = make_mutable_integer(sc, integer(slot_value(la_slot)));
+                   slot_set_value(la_slot, val);
+                   if (tc_and)
+                    while (true)
+                      {
+                        if (!o->v[0].fb(o)) {sc->value = sc->F; return(true);}
+                        if (o1->v[0].fb(o1) == z_first) {endp = f_z; break;}
+                        set_integer(val, o2->v[0].fi(o2));
+                      }
+                   else
+                    while (true)
+                      {
+                        if (o->v[0].fb(o)) {endp = if_true; break;}
+                        if (o1->v[0].fb(o1) == z_first) {endp = f_z; break;}
+                        set_integer(val, o2->v[0].fi(o2));
+                      }
+                   return(op_tc_z(sc, endp));
+                 }}}}
 #endif
   while (true)
     {
@@ -87248,32 +87248,32 @@ static bool op_tc_if_a_z_if_a_z_laa(s7_scheme *sc, bool cond, s7_pointer code)
   if (slot1)
     {
       if ((slot1 == laa_slot) && (fx_proc(f_test) == fx_is_null_t) && (fx_proc(la) == fx_cdr_t) && (fx_proc(laa) == fx_cdr_u) &&
-	  (is_boolean(car(if_true))) && (is_boolean(car(f_true))))
-	{
-	  s7_pointer la_val = slot_value(la_slot), laa_val = slot_value(laa_slot);
-	  while (true)
-	    {
-	      if (is_null(laa_val)) {sc->value = car(if_true); return(true);}
-	      if (is_null(la_val)) {sc->value = car(f_true); return(true);}
-	      la_val = cdr(la_val);
-	      laa_val = cdr(laa_val);
-	    }}
+          (is_boolean(car(if_true))) && (is_boolean(car(f_true))))
+        {
+          s7_pointer la_val = slot_value(la_slot), laa_val = slot_value(laa_slot);
+          while (true)
+            {
+              if (is_null(laa_val)) {sc->value = car(if_true); return(true);}
+              if (is_null(la_val)) {sc->value = car(f_true); return(true);}
+              la_val = cdr(la_val);
+              laa_val = cdr(laa_val);
+            }}
       while (true)
-	{
-	  if (is_null(slot_value(slot1))) {endp = if_true; break;}
-	  if (fx_call(sc, f_test) != sc->F) {endp = f_true; break;}
-	  sc->rec_p1 = fx_call(sc, la);
-	  slot_set_value(laa_slot, fx_call(sc, laa));
-	  slot_set_value(la_slot, sc->rec_p1);
-	}}
+        {
+          if (is_null(slot_value(slot1))) {endp = if_true; break;}
+          if (fx_call(sc, f_test) != sc->F) {endp = f_true; break;}
+          sc->rec_p1 = fx_call(sc, la);
+          slot_set_value(laa_slot, fx_call(sc, laa));
+          slot_set_value(la_slot, sc->rec_p1);
+        }}
   else
     while (true)
       {
-	if (fx_call(sc, if_test) != sc->F) {endp = if_true; break;}
-	if (fx_call(sc, f_test) != sc->F) {endp = f_true; break;}
-	sc->rec_p1 = fx_call(sc, la);
-	slot_set_value(laa_slot, fx_call(sc, laa));
-	slot_set_value(la_slot, sc->rec_p1);
+        if (fx_call(sc, if_test) != sc->F) {endp = if_true; break;}
+        if (fx_call(sc, f_test) != sc->F) {endp = f_true; break;}
+        sc->rec_p1 = fx_call(sc, la);
+        slot_set_value(laa_slot, fx_call(sc, laa));
+        slot_set_value(la_slot, sc->rec_p1);
       }
   return(op_tc_z(sc, endp));
 }
@@ -87354,17 +87354,17 @@ static bool op_tc_if_a_z_if_a_l3a_l3a(s7_scheme *sc, s7_pointer code)
     {
       if (fx_call(sc, if_test) != sc->F) {endp = if_true; break;}
       if (fx_call(sc, f_test) != sc->F)
-	{
-	  sc->rec_p1 = fx_call(sc, la1);
-	  sc->rec_p2 = fx_call(sc, laa1);
-	  slot_set_value(l3a_slot, fx_call(sc, l3a1));
-	}
+        {
+          sc->rec_p1 = fx_call(sc, la1);
+          sc->rec_p2 = fx_call(sc, laa1);
+          slot_set_value(l3a_slot, fx_call(sc, l3a1));
+        }
       else
-	{
-	  sc->rec_p1 = fx_call(sc, la2);
-	  sc->rec_p2 = fx_call(sc, laa2);
-	  slot_set_value(l3a_slot, fx_call(sc, l3a2));
-	}
+        {
+          sc->rec_p1 = fx_call(sc, la2);
+          sc->rec_p2 = fx_call(sc, laa2);
+          slot_set_value(l3a_slot, fx_call(sc, l3a2));
+        }
       slot_set_value(laa_slot, sc->rec_p2);
       slot_set_value(la_slot, sc->rec_p1);
     }
@@ -87440,42 +87440,42 @@ static bool op_tc_let_if_a_z_laa(s7_scheme *sc, s7_pointer code)
     {
       sc->pc = 0;
       if (bool_optimize(sc, if_test))
-	{
-	  opt_info *o = sc->opts[0];
-	  opt_info *o1 = sc->opts[sc->pc], *o2, *o3;
-	  if ((is_t_integer(slot_value(la_slot))) &&
-	      (is_t_integer(slot_value(laa_slot))))
-	    {
-	      if (int_optimize(sc, la))
-		{
-		  o2 = sc->opts[sc->pc];
-		  if (int_optimize(sc, laa))
-		    {
-		      o3 = sc->opts[sc->pc];
-		      set_curlet(sc, outer_let);
-		      if (int_optimize(sc, let_var))
-			{
-			  s7_pointer val1 = make_mutable_integer(sc, integer(slot_value(la_slot)));
-			  s7_pointer val2 = make_mutable_integer(sc, integer(slot_value(laa_slot)));
-			  s7_pointer val3 = make_mutable_integer(sc, integer(slot_value(let_slot)));
-			  set_curlet(sc, inner_let);
-			  slot_set_value(la_slot, val1);
-			  slot_set_value(laa_slot, val2);
-			  slot_set_value(let_slot, val3);
-			  while (!(o->v[0].fb(o)))
-			    {
-			      s7_int i1 = o1->v[0].fi(o1);
-			      set_integer(val2, o2->v[0].fi(o2));
-			      set_integer(val1, i1);
-			      set_integer(val3, o3->v[0].fi(o3));
-			    }
-			  unstack_gc_protect(sc);
-			  if (!op_tc_z(sc, if_true))  /* sc->inner_let in effect here since it was the last set above */
-			    return(false);
-			  free_cell(sc, let_slots(inner_let));
-			  free_cell(sc, inner_let);
-			  return(true);
-			}}}}}
+        {
+          opt_info *o = sc->opts[0];
+          opt_info *o1 = sc->opts[sc->pc], *o2, *o3;
+          if ((is_t_integer(slot_value(la_slot))) &&
+              (is_t_integer(slot_value(laa_slot))))
+            {
+              if (int_optimize(sc, la))
+                {
+                  o2 = sc->opts[sc->pc];
+                  if (int_optimize(sc, laa))
+                    {
+                      o3 = sc->opts[sc->pc];
+                      set_curlet(sc, outer_let);
+                      if (int_optimize(sc, let_var))
+                        {
+                          s7_pointer val1 = make_mutable_integer(sc, integer(slot_value(la_slot)));
+                          s7_pointer val2 = make_mutable_integer(sc, integer(slot_value(laa_slot)));
+                          s7_pointer val3 = make_mutable_integer(sc, integer(slot_value(let_slot)));
+                          set_curlet(sc, inner_let);
+                          slot_set_value(la_slot, val1);
+                          slot_set_value(laa_slot, val2);
+                          slot_set_value(let_slot, val3);
+                          while (!(o->v[0].fb(o)))
+                            {
+                              s7_int i1 = o1->v[0].fi(o1);
+                              set_integer(val2, o2->v[0].fi(o2));
+                              set_integer(val1, i1);
+                              set_integer(val3, o3->v[0].fi(o3));
+                            }
+                          unstack_gc_protect(sc);
+                          if (!op_tc_z(sc, if_true))  /* sc->inner_let in effect here since it was the last set above */
+                            return(false);
+                          free_cell(sc, let_slots(inner_let));
+                          free_cell(sc, inner_let);
+                          return(true);
+                        }}}}}
       set_no_bool_opt(code);
     }
 #endif
@@ -87522,58 +87522,58 @@ static void op_tc_let_when_laa(s7_scheme *sc, bool when, s7_pointer code)
       (car(laa) == slot_symbol(next_slot(let_slots(outer_let)))))
     {
       if ((cdr(if_true) == p) && (!when))
-	{
-	  s7_pointer a1 = slot_value(let_slots(outer_let));
-	  s7_pointer a2 = slot_value(next_slot(let_slots(outer_let)));
-	  if ((is_input_port(a1)) && (is_output_port(a2)) && (is_string_port(a1)) && (is_file_port(a2)) &&
-	      (!port_is_closed(a1)) && (!port_is_closed(a2)) && (fx_proc(if_true) == fx_c_tU_direct) &&
-	      (fx_proc(let_var) == fx_c_t_direct) && (((s7_p_pp_t)opt3_direct(cdar(if_true))) == write_char_p_pp) &&
-	      (((s7_p_p_t)opt2_direct(cdar(let_var))) == read_char_p_p) && (fx_proc(if_test) == fx_is_eof_t))
-	    {
-	      int32_t c = (int32_t)s7_character(slot_value(let_slots(inner_let)));
-	      a1 = slot_value(let_slots(outer_let));
-	      a2 = slot_value(next_slot(let_slots(outer_let)));
-	      while (c != EOF)
-		{
-		  inline_file_write_char(sc, (uint8_t)c, a2);
-		  c = string_read_char(sc, a1);
-		}}
-	  else
-	    while (fx_call(sc, if_test) == sc->F)
-	      {
-		fx_call(sc, if_true);
-		set_curlet(sc, outer_let);
-		slot_set_value(let_slot, fx_call(sc, let_var));
-		set_curlet(sc, inner_let);
-	      }}
+        {
+          s7_pointer a1 = slot_value(let_slots(outer_let));
+          s7_pointer a2 = slot_value(next_slot(let_slots(outer_let)));
+          if ((is_input_port(a1)) && (is_output_port(a2)) && (is_string_port(a1)) && (is_file_port(a2)) &&
+              (!port_is_closed(a1)) && (!port_is_closed(a2)) && (fx_proc(if_true) == fx_c_tU_direct) &&
+              (fx_proc(let_var) == fx_c_t_direct) && (((s7_p_pp_t)opt3_direct(cdar(if_true))) == write_char_p_pp) &&
+              (((s7_p_p_t)opt2_direct(cdar(let_var))) == read_char_p_p) && (fx_proc(if_test) == fx_is_eof_t))
+            {
+              int32_t c = (int32_t)s7_character(slot_value(let_slots(inner_let)));
+              a1 = slot_value(let_slots(outer_let));
+              a2 = slot_value(next_slot(let_slots(outer_let)));
+              while (c != EOF)
+                {
+                  inline_file_write_char(sc, (uint8_t)c, a2);
+                  c = string_read_char(sc, a1);
+                }}
+          else
+            while (fx_call(sc, if_test) == sc->F)
+              {
+                fx_call(sc, if_true);
+                set_curlet(sc, outer_let);
+                slot_set_value(let_slot, fx_call(sc, let_var));
+                set_curlet(sc, inner_let);
+              }}
       else
-	while (true)
-	  {
-	    p = fx_call(sc, if_test);
-	    if (when) {if (p == sc->F) break;} else {if (p != sc->F) break;}
-	    for (p = if_true; is_pair(cdr(p)); p = cdr(p))
-	      fx_call(sc, p);
-	    set_curlet(sc, outer_let);
-	    slot_set_value(let_slot, fx_call(sc, let_var));
-	    set_curlet(sc, inner_let);
-	  }}
+        while (true)
+          {
+            p = fx_call(sc, if_test);
+            if (when) {if (p == sc->F) break;} else {if (p != sc->F) break;}
+            for (p = if_true; is_pair(cdr(p)); p = cdr(p))
+              fx_call(sc, p);
+            set_curlet(sc, outer_let);
+            slot_set_value(let_slot, fx_call(sc, let_var));
+            set_curlet(sc, inner_let);
+          }}
   else
     {
       s7_pointer la_slot = let_slots(outer_let);
       s7_pointer laa_slot = next_slot(la_slot);
       while (true)
-	{
-	  p = fx_call(sc, if_test);
-	  if (when) {if (p == sc->F) break;} else {if (p != sc->F) break;}
-	  for (p = if_true; is_pair(cdr(p)); p = cdr(p))
-	    fx_call(sc, p);
-	  sc->rec_p1 = fx_call(sc, la);
-	  slot_set_value(laa_slot, fx_call(sc, laa));
-	  slot_set_value(la_slot, sc->rec_p1);
-	  set_curlet(sc, outer_let);
-	  slot_set_value(let_slot, fx_call(sc, let_var));
-	  set_curlet(sc, inner_let);
-	}}
+        {
+          p = fx_call(sc, if_test);
+          if (when) {if (p == sc->F) break;} else {if (p != sc->F) break;}
+          for (p = if_true; is_pair(cdr(p)); p = cdr(p))
+            fx_call(sc, p);
+          sc->rec_p1 = fx_call(sc, la);
+          slot_set_value(laa_slot, fx_call(sc, laa));
+          slot_set_value(la_slot, sc->rec_p1);
+          set_curlet(sc, outer_let);
+          slot_set_value(let_slot, fx_call(sc, let_var));
+          set_curlet(sc, inner_let);
+        }}
   unstack_gc_protect(sc);
   free_cell(sc, let_slots(inner_let));
   free_cell(sc, inner_let);
@@ -87625,7 +87625,7 @@ static bool op_tc_if_a_z_let_if_a_z_laa(s7_scheme *sc, s7_pointer code)
       slot_set_value(slot, fx_call(sc, cdar(let_vars)));
       set_curlet(sc, inner_let);
       for (var = cdr(let_vars), slot = next_slot(slot); is_pair(var); var = cdr(var), slot = next_slot(slot))
-	slot_set_value(slot, fx_call(sc, cdar(var)));
+        slot_set_value(slot, fx_call(sc, cdar(var)));
 
       if (fx_call(sc, if2_test) != sc->F) {endp = if2_true; break;}
       sc->rec_p1 = fx_call(sc, la);
@@ -87667,57 +87667,57 @@ static bool op_tc_let_cond(s7_scheme *sc, s7_pointer code)
   if (opt3_arglen(cdr(code)) == 0) /* (loop) etc -- no args */
     while (true)
       {
-	for (s7_pointer p = cond_body; is_pair(p); p = cdr(p))
-	  if (fx_call(sc, car(p)) != sc->F)
-	    {
-	      result = cdar(p);
-	      if (!has_tc(result))
-		goto TC_LET_COND_DONE;
-	      set_curlet(sc, outer_let);
-	      slot_set_value(let_slot, letf(sc, let_var));
-	      set_curlet(sc, inner_let);
-	      break;
-	    }}
+        for (s7_pointer p = cond_body; is_pair(p); p = cdr(p))
+          if (fx_call(sc, car(p)) != sc->F)
+            {
+              result = cdar(p);
+              if (!has_tc(result))
+                goto TC_LET_COND_DONE;
+              set_curlet(sc, outer_let);
+              slot_set_value(let_slot, letf(sc, let_var));
+              set_curlet(sc, inner_let);
+              break;
+            }}
   else
     if (opt3_arglen(cdr(code)) == 1)
       while (true)
-	for (s7_pointer p = cond_body; is_pair(p); p = cdr(p))
-	  if (fx_call(sc, car(p)) != sc->F)
-	    {
-	      result = cdar(p);
-	      if (!has_tc(result))
-		goto TC_LET_COND_DONE;
-	      slot_set_value(slots, fx_call(sc, cdar(result))); /* arg to recursion */
-	      set_curlet(sc, outer_let);
-	      slot_set_value(let_slot, letf(sc, let_var));   /* inner let var */
-	      set_curlet(sc, inner_let);
-	      break;
-	    }
+        for (s7_pointer p = cond_body; is_pair(p); p = cdr(p))
+          if (fx_call(sc, car(p)) != sc->F)
+            {
+              result = cdar(p);
+              if (!has_tc(result))
+                goto TC_LET_COND_DONE;
+              slot_set_value(slots, fx_call(sc, cdar(result))); /* arg to recursion */
+              set_curlet(sc, outer_let);
+              slot_set_value(let_slot, letf(sc, let_var));   /* inner let var */
+              set_curlet(sc, inner_let);
+              break;
+            }
 
   let_set_has_pending_value(outer_let);
   read_case = ((letf == read_char_p_p) && (is_input_port(let_var)) && (is_string_port(let_var)) && (!port_is_closed(let_var)));
   while (true)
     for (s7_pointer p = cond_body; is_pair(p); p = cdr(p))
       if (fx_call(sc, car(p)) != sc->F)
-	{
-	  result = cdar(p);
-	  if (!has_tc(result))
-	    goto TC_LET_COND_DONE;
-	  for (s7_pointer slot = slots, arg = cdar(result); is_pair(arg); slot = next_slot(slot), arg = cdr(arg))
-	    slot_simply_set_pending_value(slot, fx_call(sc, arg));
-	  for (s7_pointer slot = slots; tis_slot(slot); slot = next_slot(slot)) /* using two swapping lets instead is slightly slower */
-	    slot_set_value(slot, slot_pending_value(slot));
-
-	  if (read_case)
-	    slot_set_value(let_slot, chars[string_read_char(sc, let_var)]);
-	  else
-	    {
-	      set_curlet(sc, outer_let);
-	      slot_set_value(let_slot, letf(sc, let_var));
-	      set_curlet(sc, inner_let);
-	    }
-	  break;
-	}
+        {
+          result = cdar(p);
+          if (!has_tc(result))
+            goto TC_LET_COND_DONE;
+          for (s7_pointer slot = slots, arg = cdar(result); is_pair(arg); slot = next_slot(slot), arg = cdr(arg))
+            slot_simply_set_pending_value(slot, fx_call(sc, arg));
+          for (s7_pointer slot = slots; tis_slot(slot); slot = next_slot(slot)) /* using two swapping lets instead is slightly slower */
+            slot_set_value(slot, slot_pending_value(slot));
+
+          if (read_case)
+            slot_set_value(let_slot, chars[string_read_char(sc, let_var)]);
+          else
+            {
+              set_curlet(sc, outer_let);
+              slot_set_value(let_slot, letf(sc, let_var));
+              set_curlet(sc, inner_let);
+            }
+          break;
+        }
   let_clear_has_pending_value(sc, outer_let);
 
  TC_LET_COND_DONE:
@@ -87753,15 +87753,15 @@ static bool op_tc_cond_a_z_a_laa_laa(s7_scheme *sc, s7_pointer code)
     {
       if (fx_call(sc, c1) != sc->F) {c1 = cdr(c1); break;}
       if (fx_call(sc, c2) != sc->F)
-	{
-	  sc->rec_p1 = fx_call(sc, la1);
-	  slot_set_value(laa_slot, fx_call(sc, laa1));
-	}
+        {
+          sc->rec_p1 = fx_call(sc, la1);
+          slot_set_value(laa_slot, fx_call(sc, laa1));
+        }
       else
-	{
-	  sc->rec_p1 = fx_call(sc, la2);
-	  slot_set_value(laa_slot, fx_call(sc, laa2));
-	}
+        {
+          sc->rec_p1 = fx_call(sc, la2);
+          slot_set_value(laa_slot, fx_call(sc, laa2));
+        }
       slot_set_value(la_slot, sc->rec_p1);
     }
   return(op_tc_z(sc, c1));
@@ -87896,33 +87896,33 @@ static opt_pid_t opinit_if_a_a_opa_laq(s7_scheme *sc, bool a_op, bool la_op, s7_
   if ((is_symbol(c_op)) &&
       ((is_global(c_op)) ||
        ((is_slot(global_slot(c_op))) &&
-	(s7_slot(sc, c_op) == global_slot(c_op)))))
+        (s7_slot(sc, c_op) == global_slot(c_op)))))
     {
       s7_pointer s_func = global_value(c_op), slot = let_slots(sc->curlet);
       if (is_c_function(s_func))
-	{
-	  sc->pc = 0;
-	  sc->rec_test_o = sc->opts[0];
-	  if (bool_optimize(sc, cdr(code)))
-	    {
-	      int32_t start_pc = sc->pc;
-	      sc->rec_result_o = sc->opts[start_pc];
-	      if (is_t_integer(slot_value(slot)))
-		{
-		  sc->rec_i_ii_f = s7_i_ii_function(s_func);
-		  if ((sc->rec_i_ii_f) &&
-		      (int_optimize(sc, (a_op) ? cddr(code) : cdddr(code))))
-		    {
-		      sc->rec_a1_o = sc->opts[sc->pc];
-		      if (int_optimize(sc, (la_op) ? cdr(caller) : cddr(caller))) /* cdadr? */
-			{
-			  sc->rec_a2_o = sc->opts[sc->pc];
-			  if (int_optimize(sc, cdr(opt3_pair(caller))))
-			    {
-			      sc->rec_val1 = make_mutable_integer(sc, integer(slot_value(slot)));
-			      slot_set_value(slot, sc->rec_val1);
-			      return(OPT_INT);
-			    }}}}}}}
+        {
+          sc->pc = 0;
+          sc->rec_test_o = sc->opts[0];
+          if (bool_optimize(sc, cdr(code)))
+            {
+              int32_t start_pc = sc->pc;
+              sc->rec_result_o = sc->opts[start_pc];
+              if (is_t_integer(slot_value(slot)))
+                {
+                  sc->rec_i_ii_f = s7_i_ii_function(s_func);
+                  if ((sc->rec_i_ii_f) &&
+                      (int_optimize(sc, (a_op) ? cddr(code) : cdddr(code))))
+                    {
+                      sc->rec_a1_o = sc->opts[sc->pc];
+                      if (int_optimize(sc, (la_op) ? cdr(caller) : cddr(caller))) /* cdadr? */
+                        {
+                          sc->rec_a2_o = sc->opts[sc->pc];
+                          if (int_optimize(sc, cdr(opt3_pair(caller))))
+                            {
+                              sc->rec_val1 = make_mutable_integer(sc, integer(slot_value(slot)));
+                              slot_set_value(slot, sc->rec_val1);
+                              return(OPT_INT);
+                            }}}}}}}
 #endif
   rec_set_test(sc, cdr(code));
   rec_set_res(sc, (a_op) ?  cddr(code) : cdddr(code));
@@ -88021,7 +88021,7 @@ static void wrap_recur_if_a_a_opa_laq(s7_scheme *sc, bool a_op, bool la_op)
     {
       sc->rec_stack = recur_make_stack(sc);
       if (a_op)
-	sc->value = (la_op) ? oprec_if_a_a_opa_laq(sc) : oprec_if_a_a_opla_aq(sc);
+        sc->value = (la_op) ? oprec_if_a_a_opa_laq(sc) : oprec_if_a_a_opla_aq(sc);
       else sc->value = (la_op) ? oprec_if_a_opa_laq_a(sc) : oprec_if_a_opla_aq_a(sc);
       sc->rec_loc = 0;
     }
@@ -88201,59 +88201,59 @@ static opt_pid_t opinit_if_a_a_opla_laq(s7_scheme *sc, bool a_op)
   if ((is_symbol(c_op)) &&
       ((is_global(c_op)) ||
        ((is_slot(global_slot(c_op))) &&
-	(s7_slot(sc, c_op) == global_slot(c_op)))))
+        (s7_slot(sc, c_op) == global_slot(c_op)))))
     {
       s7_pointer s_func = global_value(c_op);
       s7_pointer slot = let_slots(sc->curlet);
       if (is_c_function(s_func))
-	{
-	  sc->pc = 0;
-	  sc->rec_test_o = sc->opts[0];
-	  if (bool_optimize(sc, cdr(sc->code)))
-	    {
-	      int32_t start_pc = sc->pc;
-	      sc->rec_result_o = sc->opts[start_pc];
-	      if (is_t_integer(slot_value(slot)))
-		{
-		  sc->rec_i_ii_f = s7_i_ii_function(s_func);
-		  if ((sc->rec_i_ii_f) &&
-		      (int_optimize(sc, (a_op) ? cddr(sc->code) : cdddr(sc->code))))
-		    {
-		      sc->rec_a1_o = sc->opts[sc->pc];
-		      if (int_optimize(sc, cdadr(caller)))
-			{
-			  sc->rec_a2_o = sc->opts[sc->pc];
-			  if (int_optimize(sc, cdr(opt3_pair(caller))))
-			    {
-			      sc->rec_val1 = make_mutable_integer(sc, integer(slot_value(slot)));
-			      slot_set_value(slot, sc->rec_val1);
-			      if (sc->pc != 4)
-				return(OPT_INT);
-			      sc->rec_fb1 = sc->rec_test_o->v[0].fb;
-			      sc->rec_fi1 = sc->rec_result_o->v[0].fi;
-			      sc->rec_fi2 = sc->rec_a1_o->v[0].fi;
-			      sc->rec_fi3 = sc->rec_a2_o->v[0].fi;
-			      return(OPT_INT_0);
-			    }}}}
-	      if (is_t_real(slot_value(slot)))
-		{
-		  sc->rec_d_dd_f = s7_d_dd_function(s_func);
-		  if (sc->rec_d_dd_f)
-		    {
-		      sc->pc = start_pc;
-		      sc->rec_result_o = sc->opts[start_pc];
-		      if (float_optimize(sc, (a_op) ? cddr(sc->code) : cdddr(sc->code)))
-			{
-			  sc->rec_a1_o = sc->opts[sc->pc];
-			  if (float_optimize(sc, cdadr(caller)))
-			    {
-			      sc->rec_a2_o = sc->opts[sc->pc];
-			      if (float_optimize(sc, cdr(opt3_pair(caller))))
-				{
-				  sc->rec_val1 = make_mutable_real(sc, real(slot_value(slot)));
-				  slot_set_value(slot, sc->rec_val1);
-				  return(OPT_DBL);
-				}}}}}}}}
+        {
+          sc->pc = 0;
+          sc->rec_test_o = sc->opts[0];
+          if (bool_optimize(sc, cdr(sc->code)))
+            {
+              int32_t start_pc = sc->pc;
+              sc->rec_result_o = sc->opts[start_pc];
+              if (is_t_integer(slot_value(slot)))
+                {
+                  sc->rec_i_ii_f = s7_i_ii_function(s_func);
+                  if ((sc->rec_i_ii_f) &&
+                      (int_optimize(sc, (a_op) ? cddr(sc->code) : cdddr(sc->code))))
+                    {
+                      sc->rec_a1_o = sc->opts[sc->pc];
+                      if (int_optimize(sc, cdadr(caller)))
+                        {
+                          sc->rec_a2_o = sc->opts[sc->pc];
+                          if (int_optimize(sc, cdr(opt3_pair(caller))))
+                            {
+                              sc->rec_val1 = make_mutable_integer(sc, integer(slot_value(slot)));
+                              slot_set_value(slot, sc->rec_val1);
+                              if (sc->pc != 4)
+                                return(OPT_INT);
+                              sc->rec_fb1 = sc->rec_test_o->v[0].fb;
+                              sc->rec_fi1 = sc->rec_result_o->v[0].fi;
+                              sc->rec_fi2 = sc->rec_a1_o->v[0].fi;
+                              sc->rec_fi3 = sc->rec_a2_o->v[0].fi;
+                              return(OPT_INT_0);
+                            }}}}
+              if (is_t_real(slot_value(slot)))
+                {
+                  sc->rec_d_dd_f = s7_d_dd_function(s_func);
+                  if (sc->rec_d_dd_f)
+                    {
+                      sc->pc = start_pc;
+                      sc->rec_result_o = sc->opts[start_pc];
+                      if (float_optimize(sc, (a_op) ? cddr(sc->code) : cdddr(sc->code)))
+                        {
+                          sc->rec_a1_o = sc->opts[sc->pc];
+                          if (float_optimize(sc, cdadr(caller)))
+                            {
+                              sc->rec_a2_o = sc->opts[sc->pc];
+                              if (float_optimize(sc, cdr(opt3_pair(caller))))
+                                {
+                                  sc->rec_val1 = make_mutable_real(sc, real(slot_value(slot)));
+                                  slot_set_value(slot, sc->rec_val1);
+                                  return(OPT_DBL);
+                                }}}}}}}}
 #endif
   rec_set_test(sc, cdr(sc->code));
   rec_set_res(sc, (a_op) ?  cddr(sc->code) : cdddr(sc->code));
@@ -88390,15 +88390,15 @@ static void wrap_recur_if_a_a_opla_laq(s7_scheme *sc, bool a_op)
   if ((choice == OPT_INT) || (choice == OPT_INT_0))
     {
       if (choice == OPT_INT_0)
-	sc->value = make_integer(sc, (a_op) ? oprec_i_if_a_a_opla_laq_0(sc) : oprec_i_if_a_opla_laq_a_0(sc));
+        sc->value = make_integer(sc, (a_op) ? oprec_i_if_a_a_opla_laq_0(sc) : oprec_i_if_a_opla_laq_a_0(sc));
       else sc->value = make_integer(sc, (a_op) ? oprec_i_if_a_a_opla_laq(sc) : oprec_i_if_a_opla_laq_a(sc));
     }
   else
     if (choice == OPT_PTR)
       {
-	sc->rec_stack = recur_make_stack(sc);
-	sc->value = (a_op) ? oprec_if_a_a_opla_laq(sc) : oprec_if_a_opla_laq_a(sc);
-	sc->rec_loc = 0;
+        sc->rec_stack = recur_make_stack(sc);
+        sc->value = (a_op) ? oprec_if_a_a_opla_laq(sc) : oprec_if_a_opla_laq_a(sc);
+        sc->rec_loc = 0;
       }
     else sc->value = make_real(sc, (a_op) ? oprec_d_if_a_a_opla_laq(sc) : oprec_d_if_a_opla_laq_a(sc));
 }
@@ -88835,20 +88835,20 @@ static s7_pointer oprec_cond_a_a_a_laa_opa_laaq(s7_scheme *sc)
   else
     if (sc->rec_f1f(sc, sc->rec_f1p) != sc->F)
       {
-	recur_push(sc, sc->rec_f2f(sc, sc->rec_f2p));
-	slot_set_value(sc->rec_slot2, sc->rec_f3f(sc, sc->rec_f3p));
-	slot_set_value(sc->rec_slot1, recur_pop(sc));
-	set_car(sc->t2_2, oprec_cond_a_a_a_laa_opa_laaq(sc)); /* first laa above */
+        recur_push(sc, sc->rec_f2f(sc, sc->rec_f2p));
+        slot_set_value(sc->rec_slot2, sc->rec_f3f(sc, sc->rec_f3p));
+        slot_set_value(sc->rec_slot1, recur_pop(sc));
+        set_car(sc->t2_2, oprec_cond_a_a_a_laa_opa_laaq(sc)); /* first laa above */
       }
     else
       {
-	recur_push(sc, sc->rec_f4f(sc, sc->rec_f4p));
-	recur_push(sc, sc->rec_f5f(sc, sc->rec_f5p));
-	slot_set_value(sc->rec_slot2, sc->rec_f6f(sc, sc->rec_f6p));
-	slot_set_value(sc->rec_slot1, recur_pop(sc));
-	set_car(sc->t2_2, oprec_cond_a_a_a_laa_opa_laaq(sc));
-	set_car(sc->t2_1, recur_pop(sc));
-	set_car(sc->t2_2, sc->rec_fn(sc, sc->t2_1));
+        recur_push(sc, sc->rec_f4f(sc, sc->rec_f4p));
+        recur_push(sc, sc->rec_f5f(sc, sc->rec_f5p));
+        slot_set_value(sc->rec_slot2, sc->rec_f6f(sc, sc->rec_f6p));
+        slot_set_value(sc->rec_slot1, recur_pop(sc));
+        set_car(sc->t2_2, oprec_cond_a_a_a_laa_opa_laaq(sc));
+        set_car(sc->t2_1, recur_pop(sc));
+        set_car(sc->t2_2, sc->rec_fn(sc, sc->t2_1));
       }
   set_car(sc->t2_1, recur_pop(sc));
   return(sc->rec_fn(sc, sc->t2_1));
@@ -88881,46 +88881,46 @@ static opt_pid_t opinit_cond_a_a_a_laa_lopa_laaq(s7_scheme *sc)
       sc->pc = 0;
       sc->rec_test_o = sc->opts[0];
       if (bool_optimize(sc, cadr(sc->code)))
-	{
-	  sc->rec_result_o = sc->opts[sc->pc];
-	  if (int_optimize(sc, cdadr(sc->code)))
-	    {
-	      s7_pointer laa1 = caddr(sc->code);
-	      sc->rec_a1_o = sc->opts[sc->pc];
-	      if (bool_optimize(sc, laa1))
-		{
-		  sc->rec_a2_o = sc->opts[sc->pc];
-	  	  if (int_optimize(sc, cdadr(laa1)))
-		    {
-		      sc->rec_a3_o = sc->opts[sc->pc];
-		      if (int_optimize(sc, cddadr(laa1)))
-			{
-			  s7_pointer laa2 = cadr(cadddr(sc->code)), laa3 = caddr(laa2);
-			  sc->rec_a4_o = sc->opts[sc->pc];
-			  if (int_optimize(sc, cdr(laa2)))
-			    {
-			      sc->rec_a5_o = sc->opts[sc->pc];
-			      if (int_optimize(sc, cdr(laa3)))
-				{
-				  sc->rec_a6_o = sc->opts[sc->pc];
-				  if (int_optimize(sc, cddr(laa3)))
-				    {
-				      sc->rec_val1 = make_mutable_integer(sc, integer(slot_value(sc->rec_slot1)));
-				      slot_set_value(sc->rec_slot1, sc->rec_val1);
-				      sc->rec_val2 = make_mutable_integer(sc, integer(slot_value(sc->rec_slot2)));
-				      slot_set_value(sc->rec_slot2, sc->rec_val2);
-				      if (sc->pc != 8)
-					return(OPT_INT);
-				      sc->rec_fb1 = sc->rec_test_o->v[0].fb;
-				      sc->rec_fb2 = sc->rec_a1_o->v[0].fb;
-				      sc->rec_fi1 = sc->rec_result_o->v[0].fi;
-				      sc->rec_fi2 = sc->rec_a2_o->v[0].fi;
-				      sc->rec_fi3 = sc->rec_a3_o->v[0].fi;
-				      sc->rec_fi4 = sc->rec_a4_o->v[0].fi;
-				      sc->rec_fi5 = sc->rec_a5_o->v[0].fi;
-				      sc->rec_fi6 = sc->rec_a6_o->v[0].fi;
-				      return(OPT_INT_0);
-				    }}}}}}}}}
+        {
+          sc->rec_result_o = sc->opts[sc->pc];
+          if (int_optimize(sc, cdadr(sc->code)))
+            {
+              s7_pointer laa1 = caddr(sc->code);
+              sc->rec_a1_o = sc->opts[sc->pc];
+              if (bool_optimize(sc, laa1))
+                {
+                  sc->rec_a2_o = sc->opts[sc->pc];
+                    if (int_optimize(sc, cdadr(laa1)))
+                    {
+                      sc->rec_a3_o = sc->opts[sc->pc];
+                      if (int_optimize(sc, cddadr(laa1)))
+                        {
+                          s7_pointer laa2 = cadr(cadddr(sc->code)), laa3 = caddr(laa2);
+                          sc->rec_a4_o = sc->opts[sc->pc];
+                          if (int_optimize(sc, cdr(laa2)))
+                            {
+                              sc->rec_a5_o = sc->opts[sc->pc];
+                              if (int_optimize(sc, cdr(laa3)))
+                                {
+                                  sc->rec_a6_o = sc->opts[sc->pc];
+                                  if (int_optimize(sc, cddr(laa3)))
+                                    {
+                                      sc->rec_val1 = make_mutable_integer(sc, integer(slot_value(sc->rec_slot1)));
+                                      slot_set_value(sc->rec_slot1, sc->rec_val1);
+                                      sc->rec_val2 = make_mutable_integer(sc, integer(slot_value(sc->rec_slot2)));
+                                      slot_set_value(sc->rec_slot2, sc->rec_val2);
+                                      if (sc->pc != 8)
+                                        return(OPT_INT);
+                                      sc->rec_fb1 = sc->rec_test_o->v[0].fb;
+                                      sc->rec_fb2 = sc->rec_a1_o->v[0].fb;
+                                      sc->rec_fi1 = sc->rec_result_o->v[0].fi;
+                                      sc->rec_fi2 = sc->rec_a2_o->v[0].fi;
+                                      sc->rec_fi3 = sc->rec_a3_o->v[0].fi;
+                                      sc->rec_fi4 = sc->rec_a4_o->v[0].fi;
+                                      sc->rec_fi5 = sc->rec_a5_o->v[0].fi;
+                                      sc->rec_fi6 = sc->rec_a6_o->v[0].fi;
+                                      return(OPT_INT_0);
+                                    }}}}}}}}}
 #endif
   rec_set_test(sc, cadr(sc->code));
   rec_set_res(sc, cdadr(sc->code));
@@ -89135,11 +89135,11 @@ static bool op_s_g(s7_scheme *sc)
 static bool op_x_a(s7_scheme *sc, s7_pointer f)
 {
   if ((((type(f) == T_C_FUNCTION) &&
-	(c_function_is_aritable(f, 1))) ||
+        (c_function_is_aritable(f, 1))) ||
        ((type(f) == T_C_RST_NO_REQ_FUNCTION) &&
-	(c_function_max_args(f) >= 1) &&
-	(f != initial_value(sc->hash_table_symbol)) &&
-	(f != initial_value(sc->weak_hash_table_symbol)))) &&
+        (c_function_max_args(f) >= 1) &&
+        (f != initial_value(sc->hash_table_symbol)) &&
+        (f != initial_value(sc->weak_hash_table_symbol)))) &&
       (!needs_copied_args(f)))
     {
       sc->value = c_function_call(f)(sc, with_list_t1(fx_call(sc, cdr(sc->code))));
@@ -89161,8 +89161,8 @@ static bool op_x_a(s7_scheme *sc, s7_pointer f)
       sc->args = set_plist_1(sc, fx_call(sc, cdr(sc->code)));
     else
       {
-	sc->args = fx_call(sc, cdr(sc->code));
-	sc->args = list_1(sc, sc->args);
+        sc->args = fx_call(sc, cdr(sc->code));
+        sc->args = list_1(sc, sc->args);
       }
   sc->code = f;
   return(false); /* goto APPLY */
@@ -89172,13 +89172,13 @@ static bool op_x_sc(s7_scheme *sc, s7_pointer f)
 {
   s7_pointer code = sc->code;
   if (((type(f) == T_C_FUNCTION) && (c_function_is_aritable(f, 2))) ||
-      ((type(f) == T_C_RST_NO_REQ_FUNCTION) &&	(c_function_max_args(f) >= 2)))
+      ((type(f) == T_C_RST_NO_REQ_FUNCTION) &&        (c_function_max_args(f) >= 2)))
     { /* ((L 'abs) x 0.0001) where 'abs is '* in timp.scm */
       if (!needs_copied_args(f))
-	{
-	  sc->value = c_function_call(f)(sc, set_plist_2(sc, lookup_checked(sc, cadr(code)), caddr(code)));
-	  return(true);
-	}
+        {
+          sc->value = c_function_call(f)(sc, set_plist_2(sc, lookup_checked(sc, cadr(code)), caddr(code)));
+          return(true);
+        }
       sc->args = list_2(sc, lookup_checked(sc, cadr(code)), caddr(code));
       sc->code = f;
       return(false); /* goto APPLY */
@@ -89199,13 +89199,13 @@ static bool op_x_aa(s7_scheme *sc, s7_pointer f)
 {
   s7_pointer code = sc->code;
   if (((type(f) == T_C_FUNCTION) && (c_function_is_aritable(f, 2))) ||
-      ((type(f) == T_C_RST_NO_REQ_FUNCTION) &&	(c_function_max_args(f) >= 2)))
+      ((type(f) == T_C_RST_NO_REQ_FUNCTION) &&        (c_function_max_args(f) >= 2)))
     { /* ((L 'abs) x 0.0001) where 'abs is '* in timp.scm */
       if (!needs_copied_args(f))
-	{
-	  sc->value = c_function_call(f)(sc, with_list_t2(fx_call(sc, cdr(code)), fx_call(sc, cddr(code))));
-	  return(true);
-	}
+        {
+          sc->value = c_function_call(f)(sc, with_list_t2(fx_call(sc, cdr(code)), fx_call(sc, cddr(code))));
+          return(true);
+        }
       sc->args = fx_call(sc, cddr(code));
       sc->args = list_2(sc, sc->value = fx_call(sc, cdr(code)), sc->args);
       sc->code = f;
@@ -89219,7 +89219,7 @@ static bool op_x_aa(s7_scheme *sc, s7_pointer f)
     {
       sc->args = fx_call(sc, cddr(code));
       if (!needs_copied_args(f))
-	sc->args = set_plist_2(sc, fx_call(sc, cdr(code)), sc->args);
+        sc->args = set_plist_2(sc, fx_call(sc, cdr(code)), sc->args);
       else sc->args = list_2(sc, sc->value = fx_call(sc, cdr(code)), sc->args);
     }
   sc->code = f;
@@ -89264,7 +89264,7 @@ static void op_safe_c_star_a(s7_scheme *sc)
   sc->args = fx_call(sc, cdr(sc->code));
   if (is_symbol_and_keyword(sc->args))               /* (blocks3 (car (list :asdf))) */
     error_nr(sc, sc->syntax_error_symbol,
-	     set_elist_4(sc, wrap_string(sc, "~A: keyword ~S, but no value: ~S", 32), car(sc->code), sc->args, sc->code));
+             set_elist_4(sc, wrap_string(sc, "~A: keyword ~S, but no value: ~S", 32), car(sc->code), sc->args, sc->code));
   /* scheme-level define* here also gives "not a parameter name" */
   sc->args = list_1(sc, sc->args);
   sc->code = opt1_cfunc(sc->code);
@@ -89549,9 +89549,9 @@ static Inline bool inline_collect_np_args(s7_scheme *sc, opcode_t op, s7_pointer
       sc->args = cons(sc, sc->value = fx_call(sc, p), sc->args); /* reversed before apply in OP_ANY_C_NP_1 */
     else
       {
-	push_stack(sc, op, sc->args, cdr(p));
-	sc->code = T_Pair(car(p));
-	return(true);
+        push_stack(sc, op, sc->args, cdr(p));
+        sc->code = T_Pair(car(p));
+        return(true);
       }
   return(false);
 }
@@ -89566,13 +89566,13 @@ static /* inline */ bool op_any_c_np(s7_scheme *sc) /* code: (func . args) where
       sc->args = cons(sc, sc->value = fx_call(sc, p), sc->args); /* reversed before apply in OP_ANY_C_NP_1 */
     else
       {
-	if (sc->op_stack_now >= sc->op_stack_end)
-	  resize_op_stack(sc);
-	push_op_stack(sc, sc->code);
-	check_stack_size(sc);
-	push_stack(sc, ((intptr_t)((is_pair(cdr(p))) ? OP_ANY_C_NP_1 : OP_ANY_C_NP_2)), sc->args, cdr(p));
-	sc->code = T_Pair(car(p));
-	return(true);
+        if (sc->op_stack_now >= sc->op_stack_end)
+          resize_op_stack(sc);
+        push_op_stack(sc, sc->code);
+        check_stack_size(sc);
+        push_stack(sc, ((intptr_t)((is_pair(cdr(p))) ? OP_ANY_C_NP_1 : OP_ANY_C_NP_2)), sc->args, cdr(p));
+        sc->code = T_Pair(car(p));
+        return(true);
       }
   sc->args = proper_list_reverse_in_place(sc, sc->args);
   sc->value = fn_proc(sc->code)(sc, sc->args);
@@ -89620,7 +89620,7 @@ static void op_any_closure_np(s7_scheme *sc)
       sc->args = fx_call(sc, p);
       sc->args = list_1(sc, sc->args);
       for (p = cdr(p); (is_pair(p)) && (has_fx(p)); p = cdr(p))
-	sc->args = cons_unchecked(sc, fx_call(sc, p), sc->args);
+        sc->args = cons_unchecked(sc, fx_call(sc, p), sc->args);
     }
   else sc->args = sc->nil;
   push_stack(sc, ((intptr_t)((is_pair(cdr(p))) ? OP_ANY_CLOSURE_NP_1 : OP_ANY_CLOSURE_NP_2)), sc->args, cdr(p));
@@ -89642,13 +89642,13 @@ static void op_any_closure_np_end(s7_scheme *sc)
       set_curlet(sc, closure_let(f));
       let_set_id(sc->curlet, id);
       for (x = let_slots(sc->curlet), z = sc->args; tis_slot(x); x = next_slot(x), z = cdr(z))
-	{
-	  slot_set_value(x, car(z));
-	  symbol_set_local_slot(slot_symbol(x), id, x);
-	  /* don't free sc->args -- it might be needed in the error below */
-	}
+        {
+          slot_set_value(x, car(z));
+          symbol_set_local_slot(slot_symbol(x), id, x);
+          /* don't free sc->args -- it might be needed in the error below */
+        }
       if (tis_slot(x))
-	error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, not_enough_arguments_string, sc->code, sc->args));
+        error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, not_enough_arguments_string, sc->code, sc->args));
     }
   else
     {
@@ -89661,11 +89661,11 @@ static void op_any_closure_np_end(s7_scheme *sc)
       let_set_slots(e, last_slot);
       symbol_set_local_slot(car(p), id, last_slot);
       for (p = cdr(p), z = cdr(sc->args); is_pair(p); p = cdr(p), z = cdr(z))
-	last_slot = inline_add_slot_at_end(sc, id, last_slot, car(p), car(z)); /* sets last_slot, don't free sc->args -- used below */
+        last_slot = inline_add_slot_at_end(sc, id, last_slot, car(p), car(z)); /* sets last_slot, don't free sc->args -- used below */
       set_curlet(sc, e);
       sc->z = sc->unused;
       if (is_pair(p))
-	error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, not_enough_arguments_string, sc->code, sc->args));
+        error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, not_enough_arguments_string, sc->code, sc->args));
     }
   if (is_pair(z))  /* these checks are needed because multiple-values might evade earlier arg num checks */
     error_nr(sc, sc->wrong_number_of_args_symbol, set_elist_3(sc, too_many_arguments_string, sc->code, sc->args));
@@ -89866,16 +89866,16 @@ static bool eval_args_no_eval_args(s7_scheme *sc)
   if (is_any_macro(sc->value))
     {
       if (!s7_is_proper_list(sc, cdr(sc->code)))
-	error_nr(sc, sc->syntax_error_symbol, set_elist_2(sc, wrap_string(sc, "improper list of arguments: ~S", 30), sc->code));
+        error_nr(sc, sc->syntax_error_symbol, set_elist_2(sc, wrap_string(sc, "improper list of arguments: ~S", 30), sc->code));
       sc->args = cdr(sc->code);
       if (is_symbol(car(sc->code))) /* not ((f p) args...) where (f p) has returned a macro, op_macro_d assumes car is a symbol */
-	{
-	  if (is_macro(sc->value))
-	    set_optimize_op(sc->code, fixup_macro_d(sc, OP_MACRO_D, sc->value));
-	  else
-	    if (is_macro_star(sc->value))
-	      set_optimize_op(sc->code, fixup_macro_d(sc, OP_MACRO_STAR_D, sc->value));
-	}
+        {
+          if (is_macro(sc->value))
+            set_optimize_op(sc->code, fixup_macro_d(sc, OP_MACRO_D, sc->value));
+          else
+            if (is_macro_star(sc->value))
+              set_optimize_op(sc->code, fixup_macro_d(sc, OP_MACRO_STAR_D, sc->value));
+        }
       sc->code = sc->value;
       return(true);
     }
@@ -89885,8 +89885,8 @@ static bool eval_args_no_eval_args(s7_scheme *sc)
     {
       sc->cur_op = syntax_opcode(sc->value);
       if ((is_symbol(car(sc->code))) &&  /* don't opt pair to syntax op if sc->value is actually an arg not the op! ((write and)) should not be op_and */
-	  ((car(sc->code) == syntax_symbol(sc->value)) || (lookup_global(sc, car(sc->code)) == sc->value)))
-	pair_set_syntax_op(sc->code, sc->cur_op);
+          ((car(sc->code) == syntax_symbol(sc->value)) || (lookup_global(sc, car(sc->code)) == sc->value)))
+        pair_set_syntax_op(sc->code, sc->cur_op);
       /* weird that sc->cur_op setting above seems ok, but OP_PAIR_PAIR hangs?? */
     }
   return(false);
@@ -89905,11 +89905,11 @@ static s7_pointer unbound_last_arg(s7_scheme *sc, s7_pointer car_code)
       sc->w = (is_null(sc->args)) ? list_1(sc, car_code) : proper_list_reverse_in_place(sc, cons(sc, car_code, args));
       sc->w = cons_unchecked(sc, ops, sc->w);
       error_nr(sc, sc->unbound_variable_symbol,
-	       (probably_in_repl) ?
-	       set_elist_3(sc, wrap_string(sc, "'~S is unbound in ~S", 20), car_code, sc->w) :
-	       set_elist_5(sc, wrap_string(sc, "'~S is unbound in ~S (~A[~D])", 29), car_code, sc->w,
-			   sc->file_names[location_to_file(loc)],
-			   wrap_integer(sc, location_to_line(loc))));
+               (probably_in_repl) ?
+               set_elist_3(sc, wrap_string(sc, "'~S is unbound in ~S", 20), car_code, sc->w) :
+               set_elist_5(sc, wrap_string(sc, "'~S is unbound in ~S (~A[~D])", 29), car_code, sc->w,
+                           sc->file_names[location_to_file(loc)],
+                           wrap_integer(sc, location_to_line(loc))));
     }
   return(val);
 }
@@ -89944,10 +89944,10 @@ static s7_pointer unbound_args_last_arg(s7_scheme *sc, s7_pointer car_code)
       sc->w = cons_unchecked(sc, car_code, sc->w);
       sc->w = cons_unchecked(sc, ops, proper_list_reverse_in_place(sc, sc->w));
       error_nr(sc, sc->unbound_variable_symbol,
-	       (probably_in_repl) ?
-	       set_elist_3(sc, wrap_string(sc, "'~S is unbound in ~S", 20), car_code, sc->w) :
-	       set_elist_5(sc, wrap_string(sc, "'~S is unbound in ~S (~A[~D])", 29), car_code, sc->w,
-			   sc->file_names[location_to_file(loc)], wrap_integer(sc, location_to_line(loc))));
+               (probably_in_repl) ?
+               set_elist_3(sc, wrap_string(sc, "'~S is unbound in ~S", 20), car_code, sc->w) :
+               set_elist_5(sc, wrap_string(sc, "'~S is unbound in ~S (~A[~D])", 29), car_code, sc->w,
+                           sc->file_names[location_to_file(loc)], wrap_integer(sc, location_to_line(loc))));
     }
   return(val);
 }
@@ -89959,7 +89959,7 @@ static /* inline */ bool eval_args_last_arg(s7_scheme *sc) /* inline: no diff tm
   if (is_pair(car_code))
     {
       if (sc->stack_end >= sc->stack_resize_trigger)
-	check_for_cyclic_code(sc, sc->code);
+        check_for_cyclic_code(sc, sc->code);
       push_stack(sc, OP_EVAL_ARGS5, sc->args, sc->value);
       sc->code = car_code;
       return(true);
@@ -89987,10 +89987,10 @@ static inline void eval_args_pair_car(s7_scheme *sc)
   else
     {
       if (!is_pair(code))            /* (= 0 '(1 . 2) . 3) */
-	improper_arglist_error_nr(sc);
+        improper_arglist_error_nr(sc);
       if ((is_null(cdr(code))) &&
-	  (!is_pair(car(code))))
-	push_stack(sc, OP_EVAL_ARGS3, sc->args, car(code));
+          (!is_pair(car(code))))
+        push_stack(sc, OP_EVAL_ARGS3, sc->args, car(code));
       else push_stack(sc, OP_EVAL_ARGS4, sc->args, code);
     }
   sc->code = car(sc->code);
@@ -90008,66 +90008,66 @@ static bool eval_car_pair(s7_scheme *sc)
     /* was checking for is_syntactic (pair or symbol) here but that can be confused by successive optimizer passes: (define (hi) (((lambda () list)) 1 2 3)) etc */
     {
       if (!no_int_opt(code))
-	{
-	  /* lambda */
-	  if ((car(carc) == sc->lambda_symbol) &&                  /* ((lambda ...) expr) */
-	      (is_pair(cddr(carc))) && (s7_is_proper_list(sc, cddr(carc)))) /* not dotted! */
-	    {
-	      set_opt3_pair(code, cddr(carc));              /* lambda body */
-	      if ((is_null(cadr(carc))) && (is_null(cdr(code))))
-		{
-		  set_optimize_op(code, OP_F);    	           /* ((lambda () ...)) */
-		  return(false);
-		}
-	      if (is_pair(cadr(carc)))
-		{
-		  if ((is_normal_symbol(caadr(carc))) && (!is_constant(sc, caadr(carc))) &&
-		      (is_pair(cdr(code))) && (is_fxable(sc, cadr(code))))
-		    {
-		      set_opt3_sym(cdr(code), caadr(carc)); /* new curlet symbol #1 (first arg of lambda) */
-		      if ((is_null(cdadr(carc))) && (is_null(cddr(code))))
-			{
-			  fx_annotate_args(sc, cdr(code), sc->curlet); /* ((lambda (x) ...) expr) */
-			  set_optimize_op(code, OP_F_A);
-			  return(false);
-			}
-		      if ((is_pair(cdadr(carc))) && (is_pair(cddr(code))) && (is_fxable(sc, caddr(code))) &&
-			  (is_null(cddadr(carc))) && (is_null(cdddr(code))) &&
-			  (is_normal_symbol(cadadr(carc))) && (!is_constant(sc, cadadr(carc))) && (caadr(carc) != cadadr(carc)))
-			{
-			  fx_annotate_args(sc, cdr(code), sc->curlet);
-			  set_optimize_op(code, OP_F_AA);              /* ((lambda (x y) ...) expr exor) */
-			  return(false);
-			}}
-		  set_optimize_op(code, OP_F_NP);
-		}}
-	  set_no_int_opt(code);
-	}
+        {
+          /* lambda */
+          if ((car(carc) == sc->lambda_symbol) &&                  /* ((lambda ...) expr) */
+              (is_pair(cddr(carc))) && (s7_is_proper_list(sc, cddr(carc)))) /* not dotted! */
+            {
+              set_opt3_pair(code, cddr(carc));              /* lambda body */
+              if ((is_null(cadr(carc))) && (is_null(cdr(code))))
+                {
+                  set_optimize_op(code, OP_F);                       /* ((lambda () ...)) */
+                  return(false);
+                }
+              if (is_pair(cadr(carc)))
+                {
+                  if ((is_normal_symbol(caadr(carc))) && (!is_constant(sc, caadr(carc))) &&
+                      (is_pair(cdr(code))) && (is_fxable(sc, cadr(code))))
+                    {
+                      set_opt3_sym(cdr(code), caadr(carc)); /* new curlet symbol #1 (first arg of lambda) */
+                      if ((is_null(cdadr(carc))) && (is_null(cddr(code))))
+                        {
+                          fx_annotate_args(sc, cdr(code), sc->curlet); /* ((lambda (x) ...) expr) */
+                          set_optimize_op(code, OP_F_A);
+                          return(false);
+                        }
+                      if ((is_pair(cdadr(carc))) && (is_pair(cddr(code))) && (is_fxable(sc, caddr(code))) &&
+                          (is_null(cddadr(carc))) && (is_null(cdddr(code))) &&
+                          (is_normal_symbol(cadadr(carc))) && (!is_constant(sc, cadadr(carc))) && (caadr(carc) != cadadr(carc)))
+                        {
+                          fx_annotate_args(sc, cdr(code), sc->curlet);
+                          set_optimize_op(code, OP_F_AA);              /* ((lambda (x y) ...) expr exor) */
+                          return(false);
+                        }}
+                  set_optimize_op(code, OP_F_NP);
+                }}
+          set_no_int_opt(code);
+        }
       /* ((if op1 op2) args...) is another somewhat common case */
       push_stack_no_args(sc, OP_EVAL_ARGS, code);
       sc->code = carc;
       if (!no_cell_opt(carc))
-	{
-	  /* if */
-	  if ((car(carc) == sc->if_symbol) &&
-	      (is_pair(cdr(code))) &&       /* check that we got one or two args */
-	      ((is_null(cddr(code))) ||
-	       ((is_pair(cddr(code))) && (is_null(cdddr(code))))))
-	    {
-	      check_if(sc, carc);
-	      if ((fx_function[optimize_op(carc)]) &&
-		  (is_fxable(sc, cadr(code))) &&
-		  ((is_null(cddr(code))) || (is_fxable(sc, caddr(code))))) /* checked cdddr above */
-		{
-		  fx_annotate_args(sc, cdr(code), sc->curlet);
-		  set_fx_direct(code, fx_function[optimize_op(carc)]);
-		  if (is_null(cddr(code)))
-		    set_optimize_op(code, OP_A_A);
-		  else set_optimize_op(code, ((is_symbol(cadr(code))) && (!is_pair(caddr(code))) && (!is_normal_symbol(caddr(code)))) ? OP_A_SC : OP_A_AA);
-		  return(false);  /* goto eval in trailers */
-		}}
-	  set_no_cell_opt(carc);
-	}
+        {
+          /* if */
+          if ((car(carc) == sc->if_symbol) &&
+              (is_pair(cdr(code))) &&       /* check that we got one or two args */
+              ((is_null(cddr(code))) ||
+               ((is_pair(cddr(code))) && (is_null(cdddr(code))))))
+            {
+              check_if(sc, carc);
+              if ((fx_function[optimize_op(carc)]) &&
+                  (is_fxable(sc, cadr(code))) &&
+                  ((is_null(cddr(code))) || (is_fxable(sc, caddr(code))))) /* checked cdddr above */
+                {
+                  fx_annotate_args(sc, cdr(code), sc->curlet);
+                  set_fx_direct(code, fx_function[optimize_op(carc)]);
+                  if (is_null(cddr(code)))
+                    set_optimize_op(code, OP_A_A);
+                  else set_optimize_op(code, ((is_symbol(cadr(code))) && (!is_pair(caddr(code))) && (!is_normal_symbol(caddr(code)))) ? OP_A_SC : OP_A_AA);
+                  return(false);  /* goto eval in trailers */
+                }}
+          set_no_cell_opt(carc);
+        }
       sc->cur_op = (opcode_t)symbol_syntax_op_checked(sc->code);
       pair_set_syntax_op(sc->code, sc->cur_op);
       return(true);
@@ -90077,23 +90077,23 @@ static bool eval_car_pair(s7_scheme *sc)
   if ((is_pair(cdr(code))) && (is_optimized(carc)))
     {
       if ((fx_function[optimize_op(carc)]) &&
-	  (is_fxable(sc, cadr(code))) &&
-	  ((is_null(cddr(code))) ||
-	   ((is_fxable(sc, caddr(code))) && (is_null(cdddr(code))))))
-	{
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	  set_fx_direct(code, fx_function[optimize_op(carc)]);
-	  if (is_null(cddr(code)))
-	    set_optimize_op(code, OP_A_A);
-	  else set_optimize_op(code, ((is_symbol(cadr(code))) && (!is_pair(caddr(code))) && (!is_normal_symbol(caddr(code)))) ? OP_A_SC : OP_A_AA);
-	  sc->code = carc;
-	  return(false);  /* goto eval in trailers */
-	}
+          (is_fxable(sc, cadr(code))) &&
+          ((is_null(cddr(code))) ||
+           ((is_fxable(sc, caddr(code))) && (is_null(cdddr(code))))))
+        {
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+          set_fx_direct(code, fx_function[optimize_op(carc)]);
+          if (is_null(cddr(code)))
+            set_optimize_op(code, OP_A_A);
+          else set_optimize_op(code, ((is_symbol(cadr(code))) && (!is_pair(caddr(code))) && (!is_normal_symbol(caddr(code)))) ? OP_A_SC : OP_A_AA);
+          sc->code = carc;
+          return(false);  /* goto eval in trailers */
+        }
       if ((is_null(cddr(code))) && (is_symbol(cadr(code))))
-	{
-	  set_optimize_op(code, OP_P_S);
-	  set_opt3_sym(code, cadr(code));
-	}
+        {
+          set_optimize_op(code, OP_P_S);
+          set_opt3_sym(code, cadr(code));
+        }
       /* possible op OP_P_ALL_A runs into opt2 fx overwrites in a case like ((values set!) x 32) */
       else set_optimize_op(code, OP_PAIR_PAIR);
     }
@@ -90112,28 +90112,28 @@ static goto_t trailers(s7_scheme *sc)
     {
       s7_pointer carc = T_Ext(car(code));
       if (is_symbol(carc))
-	{
-	  /* car is a symbol, sc->code a list */
-	  if (is_syntactic_symbol(carc))
-	    {
-	      sc->cur_op = (opcode_t)symbol_syntax_op_checked(code);
-	      pair_set_syntax_op(sc->code, sc->cur_op);
-	      return(goto_top_no_pop);
-	    }
-	  sc->value = lookup_global(sc, carc);
-	  set_optimize_op(code, OP_PAIR_SYM);	  /* mostly stuff outside functions (unopt) */
-	  return(goto_eval_args_top);
-	}
+        {
+          /* car is a symbol, sc->code a list */
+          if (is_syntactic_symbol(carc))
+            {
+              sc->cur_op = (opcode_t)symbol_syntax_op_checked(code);
+              pair_set_syntax_op(sc->code, sc->cur_op);
+              return(goto_top_no_pop);
+            }
+          sc->value = lookup_global(sc, carc);
+          set_optimize_op(code, OP_PAIR_SYM);          /* mostly stuff outside functions (unopt) */
+          return(goto_eval_args_top);
+        }
       if (is_pair(carc))                          /* ((if x y z) a b) etc */
-	return((eval_car_pair(sc)) ? goto_top_no_pop : goto_eval);
+        return((eval_car_pair(sc)) ? goto_top_no_pop : goto_eval);
 
       /* here we can get syntax objects like quote */
       if (is_syntax(carc))
-	{
-	  sc->cur_op = syntax_opcode(carc);
-	  pair_set_syntax_op(sc->code, sc->cur_op);
-	  return(goto_top_no_pop);
-	}
+        {
+          sc->cur_op = syntax_opcode(carc);
+          pair_set_syntax_op(sc->code, sc->cur_op);
+          return(goto_top_no_pop);
+        }
       /* car must be the function to be applied, or (for example) a syntax variable like quote that has been used locally */
       set_optimize_op(code, OP_PAIR_ANY);        /* usually an error: (#\a) etc, might be (#(0) 0) */
       sc->value = carc;
@@ -90185,18 +90185,18 @@ static token_t read_block_comment(s7_scheme *sc, s7_pointer pt)
     {
       char last_char = ' ';
       while (true)
-	{
-	  int32_t c = fgetc(port_file(pt));
-	  if (c == EOF)
-	    error_nr(sc, sc->read_error_symbol,
-		     set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #|", 40)));
-	  if ((c == '#') &&
-	      (last_char == '|'))
-	    break;
-	  last_char = c;
-	  if (c == '\n')
-	    port_line_number(pt)++;
-	}
+        {
+          int32_t c = fgetc(port_file(pt));
+          if (c == EOF)
+            error_nr(sc, sc->read_error_symbol,
+                     set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #|", 40)));
+          if ((c == '#') &&
+              (last_char == '|'))
+            break;
+          last_char = c;
+          if (c == '\n')
+            port_line_number(pt)++;
+        }
       return(token(sc));
     }
   orig_str = (const char *)(port_data(pt) + port_position(pt));
@@ -90206,13 +90206,13 @@ static token_t read_block_comment(s7_scheme *sc, s7_pointer pt)
     {
       p = strchr(str, (int)'|');
       if ((!p) || (p >= pend))
-	{
-	  port_position(pt) = port_data_size(pt);
-	  error_nr(sc, sc->read_error_symbol,
-		   set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #|", 40)));
-	}
+        {
+          port_position(pt) = port_data_size(pt);
+          error_nr(sc, sc->read_error_symbol,
+                   set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #|", 40)));
+        }
       if (p[1] == '#')
-	break;
+        break;
       str = (const char *)(p + 1);
     }
   port_position(pt) += (p - orig_str + 2);
@@ -90223,10 +90223,10 @@ static token_t read_block_comment(s7_scheme *sc, s7_pointer pt)
     {
       p = strchr(str, (int)'\n');
       if ((p) && (p < pend))
-	{
-	  port_line_number(pt)++;
-	  str = (const char *)(p + 1);
-	}
+        {
+          port_line_number(pt)++;
+          str = (const char *)(p + 1);
+        }
       else break;
     }
   return(token(sc));
@@ -90248,20 +90248,20 @@ static token_t read_excl_comment(s7_scheme *sc, s7_pointer pt)
   for (s7_pointer reader = slot_value(sc->sharp_readers); is_pair(reader); reader = cdr(reader))
     if (s7_character(caar(reader)) == '!')
       {
-	sc->strbuf[0] = (unsigned char)'!';
-	return(TOKEN_SHARP_CONST); /* next stage notices any errors */
+        sc->strbuf[0] = (unsigned char)'!';
+        return(TOKEN_SHARP_CONST); /* next stage notices any errors */
       }
   /* not #! as block comment (for Guile I guess) */
   while ((c = inchar(pt)) != EOF)
     {
       if ((c == '#') &&
-	  (last_char == '!'))
-	break;
+          (last_char == '!'))
+        break;
       last_char = c;
     }
   if (c == EOF)
     error_nr(sc, sc->read_error_symbol,
-	     set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #!", 40)));
+             set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #!", 40)));
   return(token(sc));
 }
 
@@ -90280,93 +90280,93 @@ static token_t read_sharp(s7_scheme *sc, s7_pointer pt)
 
     case 'i':                      /* #i(...) */
       if (read_sharp(sc, pt) == TOKEN_VECTOR)
-	return(TOKEN_INT_VECTOR);
+        return(TOKEN_INT_VECTOR);
       backchar('i', pt);
       break;
 
     case 'r':                      /* #r(...) */
       if (read_sharp(sc, pt) == TOKEN_VECTOR)
-	return(TOKEN_FLOAT_VECTOR);
+        return(TOKEN_FLOAT_VECTOR);
       backchar('r', pt);
       break;
 
     case 'u':                      /* #u(...) or #u8(...) */
       if (s7_peek_char(sc, pt) == chars[(int32_t)('8')]) /* backwards compatibility: #u8(...) == #u(...) */
-	{
-	  int32_t bc = inchar(pt);
-	  if (s7_peek_char(sc, pt) == chars[(int32_t)('(')])
-	    {
-	      inchar(pt);
-	      sc->w = int_one;
-	      return(TOKEN_BYTE_VECTOR);
-	    }
-	  backchar(bc, pt);
-	}
+        {
+          int32_t bc = inchar(pt);
+          if (s7_peek_char(sc, pt) == chars[(int32_t)('(')])
+            {
+              inchar(pt);
+              sc->w = int_one;
+              return(TOKEN_BYTE_VECTOR);
+            }
+          backchar(bc, pt);
+        }
       if (read_sharp(sc, pt) == TOKEN_VECTOR)
-	return(TOKEN_BYTE_VECTOR);
+        return(TOKEN_BYTE_VECTOR);
       backchar('u', pt);
       break;
 
     case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9':
       {
-	/* here we can get an overflow: #1231231231231232131D() */
-	s7_int dims = digits[c];
-	int32_t d = 0, loc = 0;
-
-	sc->strbuf[loc++] = (unsigned char)c;
-	while (true)
-	  {
-	    s7_int dig;
-	    d = inchar(pt);
-	    if (d == EOF)
-	      error_nr(sc, sc->read_error_symbol,
-		       set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #n...", 43)));
-	    dig = digits[d];
-	    if (dig >= 10) break;
-	    dims = dig + (dims * 10);
-	    if (dims <= 0)
-	      {
-		sc->strbuf[loc++] = (unsigned char)d;
-		error_nr(sc, sc->read_error_symbol,
-			 set_elist_3(sc, wrap_string(sc, "reading #~A...: ~D must be a positive integer", 45),
-				     wrap_string(sc, sc->strbuf, loc),
-				     wrap_integer(sc, dims)));
-	      }
-	    if (dims > sc->max_vector_dimensions)
-	      {
-		sc->strbuf[loc++] = (unsigned char)d;
-		sc->strbuf[loc + 1] = '\0';
-		error_nr(sc, sc->read_error_symbol,
-			 set_elist_4(sc, wrap_string(sc, "reading #~A...: ~D is too large, (*s7* 'max-vector-dimensions): ~D", 66),
-				     wrap_string(sc, sc->strbuf, loc),
-				     wrap_integer(sc, dims), wrap_integer(sc, sc->max_vector_dimensions)));
-	      }
-	    sc->strbuf[loc++] = (unsigned char)d;
-	  }
-	sc->strbuf[loc++] = d;
-	if ((d == 'd') || (d == 'i') || (d == 'r') || (d == 'u'))
-	  {
-	    int32_t e = inchar(pt);
-	    if (e == EOF)
-	      error_nr(sc, sc->read_error_symbol,
-		       set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #n()", 42)));
-	    sc->strbuf[loc++] = (unsigned char)e;
-	    if (e == '(')
-	      {
-		sc->w = make_integer(sc, dims);
-		if (d == 'd') return(TOKEN_VECTOR);
-		if (d == 'r') return(TOKEN_FLOAT_VECTOR);
-		return((d == 'u') ? TOKEN_BYTE_VECTOR : TOKEN_INT_VECTOR);
-	      }}
-	/* try to back out */
-	for (d = loc - 1; d > 0; d--)
-	  backchar(sc->strbuf[d], pt);
+        /* here we can get an overflow: #1231231231231232131D() */
+        s7_int dims = digits[c];
+        int32_t d = 0, loc = 0;
+
+        sc->strbuf[loc++] = (unsigned char)c;
+        while (true)
+          {
+            s7_int dig;
+            d = inchar(pt);
+            if (d == EOF)
+              error_nr(sc, sc->read_error_symbol,
+                       set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #n...", 43)));
+            dig = digits[d];
+            if (dig >= 10) break;
+            dims = dig + (dims * 10);
+            if (dims <= 0)
+              {
+                sc->strbuf[loc++] = (unsigned char)d;
+                error_nr(sc, sc->read_error_symbol,
+                         set_elist_3(sc, wrap_string(sc, "reading #~A...: ~D must be a positive integer", 45),
+                                     wrap_string(sc, sc->strbuf, loc),
+                                     wrap_integer(sc, dims)));
+              }
+            if (dims > sc->max_vector_dimensions)
+              {
+                sc->strbuf[loc++] = (unsigned char)d;
+                sc->strbuf[loc + 1] = '\0';
+                error_nr(sc, sc->read_error_symbol,
+                         set_elist_4(sc, wrap_string(sc, "reading #~A...: ~D is too large, (*s7* 'max-vector-dimensions): ~D", 66),
+                                     wrap_string(sc, sc->strbuf, loc),
+                                     wrap_integer(sc, dims), wrap_integer(sc, sc->max_vector_dimensions)));
+              }
+            sc->strbuf[loc++] = (unsigned char)d;
+          }
+        sc->strbuf[loc++] = d;
+        if ((d == 'd') || (d == 'i') || (d == 'r') || (d == 'u'))
+          {
+            int32_t e = inchar(pt);
+            if (e == EOF)
+              error_nr(sc, sc->read_error_symbol,
+                       set_elist_1(sc, wrap_string(sc, "unexpected end of input while reading #n()", 42)));
+            sc->strbuf[loc++] = (unsigned char)e;
+            if (e == '(')
+              {
+                sc->w = make_integer(sc, dims);
+                if (d == 'd') return(TOKEN_VECTOR);
+                if (d == 'r') return(TOKEN_FLOAT_VECTOR);
+                return((d == 'u') ? TOKEN_BYTE_VECTOR : TOKEN_INT_VECTOR);
+              }}
+        /* try to back out */
+        for (d = loc - 1; d > 0; d--)
+          backchar(sc->strbuf[d], pt);
       }
       break;
 
     case ':':  /* turn #: into : -- this is for compatibility with Guile, sigh. I just noticed that Rick is using this --
-		* I'll just leave it alone, but that means : readers need to handle this case specially.
-		*/
+                * I'll just leave it alone, but that means : readers need to handle this case specially.
+                */
       sc->strbuf[0] = ':';
       return(TOKEN_ATOM);
 
@@ -90407,7 +90407,7 @@ static token_t read_dot(s7_scheme *sc, s7_pointer pt)
     {
       backchar(c, pt);
       if ((!char_ok_in_a_name[c]) && (c != 0))
-	return(TOKEN_DOT);
+        return(TOKEN_DOT);
     }
   else
     {
@@ -90449,58 +90449,58 @@ static int32_t read_x_char(s7_scheme *sc, int32_t i, s7_pointer pt)
     {
       int32_t d1, d2, c = inchar(pt);
       if (c == '"')                  /* "\x" -> error, "\x44" or "\x44;" -> #\D */
-	{
-	  if (c_ctr == 0)            /* "\x" */
- 	    read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
-	  backchar(c, pt);           /* "\x44" I think -- not sure about this -- Guile is happy but I think it contradicts r7rs.pdf */
-	  return(i);
-	}
+        {
+          if (c_ctr == 0)            /* "\x" */
+             read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
+          backchar(c, pt);           /* "\x44" I think -- not sure about this -- Guile is happy but I think it contradicts r7rs.pdf */
+          return(i);
+        }
       if (c == ';')
-	{
-	  if (c_ctr == 0)            /* "\x;" */
- 	    read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
-	  return(i);                 /* "\x44;" */
-	}
+        {
+          if (c_ctr == 0)            /* "\x;" */
+             read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
+          return(i);                 /* "\x44;" */
+        }
       if (c == EOF)                  /* "\x<eof> */
-	{
-	  read_error_nr(sc, "#<eof> in midst of hex-char");
-	  return(i);
-	}
+        {
+          read_error_nr(sc, "#<eof> in midst of hex-char");
+          return(i);
+        }
       d1 = digits[c];
       if (d1 >= 16)                  /* "\x4H", also "\x44H" which Guile thinks is ok -- it apparently reads 2 digits and quits? */
-	{
-	  if (c_ctr == 0)
-	    read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
-	  backchar(c, pt);
-	  return(i);
-	}
+        {
+          if (c_ctr == 0)
+            read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
+          backchar(c, pt);
+          return(i);
+        }
       /* perhaps if c_ctr==0 error else backchar + return(i??) */
 
       c = inchar(pt);
       if (c == '"')                  /* "\x4" */
-	{
-	  sc->strbuf[i++] = (unsigned char)d1;
-	  backchar((char)c, pt);
-	  return(i);
-	}
+        {
+          sc->strbuf[i++] = (unsigned char)d1;
+          backchar((char)c, pt);
+          return(i);
+        }
       if (c == ';')                  /* "\x4;" */
-	{
-	  sc->strbuf[i++] = (unsigned char)d1;
-	  return(i);
-	}
+        {
+          sc->strbuf[i++] = (unsigned char)d1;
+          return(i);
+        }
       if (c == EOF)                  /* "\x4<eof */
-	{
-	  read_error_nr(sc, "#<eof> in midst of hex-char");
-	  return(i);
-	}
+        {
+          read_error_nr(sc, "#<eof> in midst of hex-char");
+          return(i);
+        }
       d2 = digits[c];
       if (d2 >= 16)
-	{
-	  if (c_ctr == 0)
-	    read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
-	  backchar(c, pt);
-	  return(i);
-	}
+        {
+          if (c_ctr == 0)
+            read_error_nr(sc, "unknown backslash usage -- perhaps you meant two backslashes?");
+          backchar(c, pt);
+          return(i);
+        }
       sc->strbuf[i++] = (unsigned char)(16 * d1 + d2);
     }
   return(i);
@@ -90513,7 +90513,7 @@ static s7_pointer unknown_string_constant(s7_scheme *sc, int32_t c)
     {
       s7_pointer result = s7_call(sc, sc->read_error_hook, set_plist_2(sc, sc->F, chars[(uint8_t)c]));
       if (is_character(result))
-	return(result);
+        return(result);
     }
   return(sc->T);
 }
@@ -90528,116 +90528,116 @@ static s7_pointer read_string_constant(s7_scheme *sc, s7_pointer pt)
       /* try the most common case first */
       char *s, *end, *start = (char *)(port_data(pt) + port_position(pt));
       if (*start == '"')
-	{
-	  port_position(pt)++;
-	  return(nil_string);
-	}
+        {
+          port_position(pt)++;
+          return(nil_string);
+        }
       end = (char *)(port_data(pt) + port_data_size(pt));
       s = strpbrk(start, "\"\n\\");
       if ((!s) || (s >= end))                     /* can this read a huge string constant from a file? */
-	{
-	  if (start == end)
-	    sc->strbuf[0] = '\0';
-	  else memcpy((void *)(sc->strbuf), (void *)start, (end - start > 8) ? 8 : (end - start));
-	  sc->strbuf[8] = '\0';
-	  return(sc->F);
-	}
+        {
+          if (start == end)
+            sc->strbuf[0] = '\0';
+          else memcpy((void *)(sc->strbuf), (void *)start, (end - start > 8) ? 8 : (end - start));
+          sc->strbuf[8] = '\0';
+          return(sc->F);
+        }
       if (*s == '"')
-	{
-	  s7_int len = s - start;
-	  port_position(pt) += (len + 1);
-	  return(make_string_with_length(sc, start, len));
-	}
+        {
+          s7_int len = s - start;
+          port_position(pt) += (len + 1);
+          return(make_string_with_length(sc, start, len));
+        }
       for (; s < end; s++)
-	{
-	  if (*s == '"')                         /* switch here no faster */
-	    {
-	      s7_int len = s - start;
-	      port_position(pt) += (len + 1);
-	      return(make_string_with_length(sc, start, len));
-	    }
-	  if (*s == '\\')
-	    {
-	      /* all kinds of special cases here (resultant string is not the current string), so drop to loop below (setting "i") */
-	      s7_int len = (s7_int)(s - start);
-	      if (len > 0)
-		{
-		  if (len >= sc->strbuf_size)
-		    resize_strbuf(sc, len);
-		  memcpy((void *)(sc->strbuf), (void *)(port_data(pt) + port_position(pt)), len);
-		  port_position(pt) += len;
-		}
-	      i = len;
-	      break;
-	    }
-	  else
-	    if (*s == '\n')
-	      port_line_number(pt)++;
-	}}
+        {
+          if (*s == '"')                         /* switch here no faster */
+            {
+              s7_int len = s - start;
+              port_position(pt) += (len + 1);
+              return(make_string_with_length(sc, start, len));
+            }
+          if (*s == '\\')
+            {
+              /* all kinds of special cases here (resultant string is not the current string), so drop to loop below (setting "i") */
+              s7_int len = (s7_int)(s - start);
+              if (len > 0)
+                {
+                  if (len >= sc->strbuf_size)
+                    resize_strbuf(sc, len);
+                  memcpy((void *)(sc->strbuf), (void *)(port_data(pt) + port_position(pt)), len);
+                  port_position(pt) += len;
+                }
+              i = len;
+              break;
+            }
+          else
+            if (*s == '\n')
+              port_line_number(pt)++;
+        }}
 
   while (true)
     {
       /* splitting this check out and duplicating the loop was slower?!? */
       int32_t c = port_read_character(pt)(sc, pt);
       switch (c)
-	{
-	case '\n':
-	  port_line_number(pt)++;
-	  sc->strbuf[i++] = (unsigned char)c;
-	  break;
-
-	case EOF:
-	  sc->strbuf[(i > 8) ? 8 : i] = '\0';
-	  return(sc->F);
-
-	case '"':
-	  return(make_string_with_length(sc, sc->strbuf, i));
-
-	case '\\':
-	  c = inchar(pt);
-	  switch (c)
-	    {
-	    case EOF:
-	      sc->strbuf[(i > 8) ? 8 : i] = '\0';
-	      return(sc->F);
-
-	    case '\\': case '"': case '|':
-	      sc->strbuf[i++] = (unsigned char)c;
+        {
+        case '\n':
+          port_line_number(pt)++;
+          sc->strbuf[i++] = (unsigned char)c;
+          break;
+
+        case EOF:
+          sc->strbuf[(i > 8) ? 8 : i] = '\0';
+          return(sc->F);
+
+        case '"':
+          return(make_string_with_length(sc, sc->strbuf, i));
+
+        case '\\':
+          c = inchar(pt);
+          switch (c)
+            {
+            case EOF:
+              sc->strbuf[(i > 8) ? 8 : i] = '\0';
+              return(sc->F);
+
+            case '\\': case '"': case '|':
+              sc->strbuf[i++] = (unsigned char)c;
               break;
 
-	    case 'n': sc->strbuf[i++] = '\n'; break;
-	    case 't': sc->strbuf[i++] = '\t'; break;
-	    case 'r': sc->strbuf[i++] = '\r'; break;
-	    case '/': sc->strbuf[i++] = '/';  break;
-	    case 'b': sc->strbuf[i++] = (unsigned char)8;    break;
-	    case 'f': sc->strbuf[i++] = (unsigned char)12;   break;
+            case 'n': sc->strbuf[i++] = '\n'; break;
+            case 't': sc->strbuf[i++] = '\t'; break;
+            case 'r': sc->strbuf[i++] = '\r'; break;
+            case '/': sc->strbuf[i++] = '/';  break;
+            case 'b': sc->strbuf[i++] = (unsigned char)8;    break;
+            case 'f': sc->strbuf[i++] = (unsigned char)12;   break;
 
-	    case 'x':
-	      i = read_x_char(sc, i, pt);
+            case 'x':
+              i = read_x_char(sc, i, pt);
               break;
 
-            default:	      /* if (!is_white_space(c)) */ /* changed 8-Apr-12 */
-	      if ((c != '\n') && (c != '\r')) /* i.e. line continuation via #\\ at end of line */
-		{
-		  s7_pointer result = unknown_string_constant(sc, c);
-		  if (!is_character(result)) return(result);
-		  sc->strbuf[i++] = character(result);
-		}
-	      /* #f here would give confusing error message "end of input", so return #t=bad backslash.
-	       *     this is not optimal. It's easy to forget that backslash needs to be backslashed.
-	       * the white_space business half-implements Scheme's \<newline>...<eol>... or \<space>...<eol>...
-	       *   feature -- the characters after \ are flushed if they're all white space and include a newline.
-	       *   (string->number "1\   2") is 12??  Too bizarre.
-	       */
-	    }
-	  break;
-
-	default:
-	  sc->strbuf[i++] = (unsigned char)c;
-	  break;
-	}
+            default:              /* if (!is_white_space(c)) */ /* changed 8-Apr-12 */
+              if ((c != '\n') && (c != '\r')) /* i.e. line continuation via #\\ at end of line */
+                {
+                  s7_pointer result = unknown_string_constant(sc, c);
+                  if (!is_character(result)) return(result);
+                  sc->strbuf[i++] = character(result);
+                }
+              /* #f here would give confusing error message "end of input", so return #t=bad backslash.
+               *     this is not optimal. It's easy to forget that backslash needs to be backslashed.
+               * the white_space business half-implements Scheme's \<newline>...<eol>... or \<space>...<eol>...
+               *   feature -- the characters after \ are flushed if they're all white space and include a newline.
+               *   (string->number "1\   2") is 12??  Too bizarre.
+               */
+            }
+          break;
+
+        default:
+          sc->strbuf[i++] = (unsigned char)c;
+          break;
+        }
       if (i >= sc->strbuf_size)
-	resize_strbuf(sc, i);
+        resize_strbuf(sc, i);
     }
 }
 
@@ -90694,94 +90694,94 @@ static s7_pointer read_expression(s7_scheme *sc)
   while (true)
     {
       switch (sc->tok)
-	{
-	case TOKEN_EOF:
-	  return(eof_object);
-
-	case TOKEN_BYTE_VECTOR:
-	  push_stack_no_let_no_code(sc, OP_READ_BYTE_VECTOR, sc->w);
-	  sc->tok = TOKEN_LEFT_PAREN;
-	  break;
-
-	case TOKEN_INT_VECTOR:
-	  push_stack_no_let_no_code(sc, OP_READ_INT_VECTOR, sc->w);
-	  sc->tok = TOKEN_LEFT_PAREN;
-	  break;
-
-	case TOKEN_FLOAT_VECTOR:
-	  push_stack_no_let_no_code(sc, OP_READ_FLOAT_VECTOR, sc->w); /* here sc->w (vector dimensions from read_sharp) -> sc->args */
-	  sc->tok = TOKEN_LEFT_PAREN;
-	  break;
-
-	case TOKEN_VECTOR:         /* already read #( -- TOKEN_VECTOR is triggered by #( */
-	  push_stack_no_let_no_code(sc, OP_READ_VECTOR, sc->w);  /* sc->w is the dimensions */
-	  /* fall through */
-
-	case TOKEN_LEFT_PAREN:
-	  sc->tok = token(sc);
-	  if (sc->tok == TOKEN_RIGHT_PAREN)
-	    return(sc->nil);
-	  if (sc->tok == TOKEN_DOT)
-	    {
-	      int32_t c;
-	      back_up_stack(sc);
-	      do {c = inchar(current_input_port(sc));} while ((c != ')') && (c != EOF));
-	      read_error_nr(sc, "stray dot after '('?");         /* (car '( . )) */
-	    }
-	  if (sc->tok == TOKEN_EOF)
-	    missing_close_paren_error_nr(sc);
-	  push_stack_no_let_no_code(sc, OP_READ_LIST, sc->nil);  /* here we need to clear args, but code is ignored */
-	  check_stack_size(sc);                                  /* s7test */
-	  break;
-
-	case TOKEN_QUOTE:
-	  check_stack_size(sc); /* no speed diff in tload.scm which looks like the worst case */
-	  push_stack_no_let_no_code(sc, OP_READ_QUOTE, sc->nil);
-	  sc->tok = token(sc);
-	  break;
-
-	case TOKEN_BACK_QUOTE:
-	  sc->tok = token(sc);
-	  push_stack_no_let_no_code(sc, OP_READ_QUASIQUOTE, sc->nil);
-	  break;
-
-	case TOKEN_COMMA:
-	  push_stack_no_let_no_code(sc, OP_READ_UNQUOTE, sc->nil);
-	  sc->tok = token(sc);
-	  if (sc->tok == TOKEN_RIGHT_PAREN)
-	    read_expression_read_error_nr(sc);
-	  if (sc->tok == TOKEN_EOF)
-	    {
-	      pop_stack(sc);
-	      read_error_nr(sc, "stray comma at the end of the input?");
-	    }
-	  break;
-
-	case TOKEN_AT_MARK:
-	  push_stack_no_let_no_code(sc, OP_READ_APPLY_VALUES, sc->nil);
-	  sc->tok = token(sc);
-	  break;
-
-	case TOKEN_ATOM:
-	  return(port_read_name(current_input_port(sc))(sc, current_input_port(sc)));
-	  /* If reading list (from lparen), this will finally get us to op_read_list */
-
-	case TOKEN_DOUBLE_QUOTE:
-	  read_double_quote(sc);
-	  return(sc->value);
-
-	case TOKEN_SHARP_CONST:
-	  return(port_read_sharp(current_input_port(sc))(sc, current_input_port(sc)));
-
-	case TOKEN_DOT:                                        /* (catch #t (lambda () (+ 1 . . )) (lambda args 'hiho)) */
-	  back_up_stack(sc);
-	  {int32_t c; do {c = inchar(current_input_port(sc));} while ((c != ')') && (c != EOF));}
-	  read_error_nr(sc, "stray dot in list?");             /* (+ 1 . . ) */
-
-	case TOKEN_RIGHT_PAREN:                                /* (catch #t (lambda () '(1 2 . )) (lambda args 'hiho)) */
-	  back_up_stack(sc);
-	  read_error_nr(sc, "unexpected close paren");         /* (+ 1 2)) or (+ 1 . ) */
-	}}
+        {
+        case TOKEN_EOF:
+          return(eof_object);
+
+        case TOKEN_BYTE_VECTOR:
+          push_stack_no_let_no_code(sc, OP_READ_BYTE_VECTOR, sc->w);
+          sc->tok = TOKEN_LEFT_PAREN;
+          break;
+
+        case TOKEN_INT_VECTOR:
+          push_stack_no_let_no_code(sc, OP_READ_INT_VECTOR, sc->w);
+          sc->tok = TOKEN_LEFT_PAREN;
+          break;
+
+        case TOKEN_FLOAT_VECTOR:
+          push_stack_no_let_no_code(sc, OP_READ_FLOAT_VECTOR, sc->w); /* here sc->w (vector dimensions from read_sharp) -> sc->args */
+          sc->tok = TOKEN_LEFT_PAREN;
+          break;
+
+        case TOKEN_VECTOR:         /* already read #( -- TOKEN_VECTOR is triggered by #( */
+          push_stack_no_let_no_code(sc, OP_READ_VECTOR, sc->w);  /* sc->w is the dimensions */
+          /* fall through */
+
+        case TOKEN_LEFT_PAREN:
+          sc->tok = token(sc);
+          if (sc->tok == TOKEN_RIGHT_PAREN)
+            return(sc->nil);
+          if (sc->tok == TOKEN_DOT)
+            {
+              int32_t c;
+              back_up_stack(sc);
+              do {c = inchar(current_input_port(sc));} while ((c != ')') && (c != EOF));
+              read_error_nr(sc, "stray dot after '('?");         /* (car '( . )) */
+            }
+          if (sc->tok == TOKEN_EOF)
+            missing_close_paren_error_nr(sc);
+          push_stack_no_let_no_code(sc, OP_READ_LIST, sc->nil);  /* here we need to clear args, but code is ignored */
+          check_stack_size(sc);                                  /* s7test */
+          break;
+
+        case TOKEN_QUOTE:
+          check_stack_size(sc); /* no speed diff in tload.scm which looks like the worst case */
+          push_stack_no_let_no_code(sc, OP_READ_QUOTE, sc->nil);
+          sc->tok = token(sc);
+          break;
+
+        case TOKEN_BACK_QUOTE:
+          sc->tok = token(sc);
+          push_stack_no_let_no_code(sc, OP_READ_QUASIQUOTE, sc->nil);
+          break;
+
+        case TOKEN_COMMA:
+          push_stack_no_let_no_code(sc, OP_READ_UNQUOTE, sc->nil);
+          sc->tok = token(sc);
+          if (sc->tok == TOKEN_RIGHT_PAREN)
+            read_expression_read_error_nr(sc);
+          if (sc->tok == TOKEN_EOF)
+            {
+              pop_stack(sc);
+              read_error_nr(sc, "stray comma at the end of the input?");
+            }
+          break;
+
+        case TOKEN_AT_MARK:
+          push_stack_no_let_no_code(sc, OP_READ_APPLY_VALUES, sc->nil);
+          sc->tok = token(sc);
+          break;
+
+        case TOKEN_ATOM:
+          return(port_read_name(current_input_port(sc))(sc, current_input_port(sc)));
+          /* If reading list (from lparen), this will finally get us to op_read_list */
+
+        case TOKEN_DOUBLE_QUOTE:
+          read_double_quote(sc);
+          return(sc->value);
+
+        case TOKEN_SHARP_CONST:
+          return(port_read_sharp(current_input_port(sc))(sc, current_input_port(sc)));
+
+        case TOKEN_DOT:                                        /* (catch #t (lambda () (+ 1 . . )) (lambda args 'hiho)) */
+          back_up_stack(sc);
+          {int32_t c; do {c = inchar(current_input_port(sc));} while ((c != ')') && (c != EOF));}
+          read_error_nr(sc, "stray dot in list?");             /* (+ 1 . . ) */
+
+        case TOKEN_RIGHT_PAREN:                                /* (catch #t (lambda () '(1 2 . )) (lambda args 'hiho)) */
+          back_up_stack(sc);
+          read_error_nr(sc, "unexpected close paren");         /* (+ 1 2)) or (+ 1 . ) */
+        }}
   /* we never get here */
   return(sc->nil);
 }
@@ -90835,7 +90835,7 @@ static void op_read_internal(s7_scheme *sc)
    */
   if (port_is_closed(current_input_port(sc)))
     error_nr(sc, sc->read_error_symbol, /* not read_error here because it paws through the port string which doesn't exist here */
-	     set_elist_1(sc, wrap_string(sc, (is_loader_port(current_input_port(sc))) ? "load input port is closed!" : "read input port is closed!", 26)));
+             set_elist_1(sc, wrap_string(sc, (is_loader_port(current_input_port(sc))) ? "load input port is closed!" : "read input port is closed!", 26)));
 
   sc->tok = token(sc);
   switch (sc->tok)
@@ -90874,25 +90874,25 @@ static void op_read_s(s7_scheme *sc)
     {
       sc->value = (*(port_input_function(port)))(sc, S7_READ, port);
       if (is_multiple_value(sc->value))
-	{
-	  clear_multiple_value(sc->value);
-	  error_nr(sc, sc->bad_result_symbol, set_elist_2(sc, wrap_string(sc, "input-function-port read returned: ~S", 37), sc->value));
-	}}
+        {
+          clear_multiple_value(sc->value);
+          error_nr(sc, sc->bad_result_symbol, set_elist_2(sc, wrap_string(sc, "input-function-port read returned: ~S", 37), sc->value));
+        }}
   else /* we used to check for string port at end here, but that is rarely true so checking takes up more time than it saves */
     {
       push_input_port(sc, port);
       push_stack_op(sc, OP_READ_DONE); /* this stops the internal read process so we only get one form */
       sc->tok = token(sc);
       switch (sc->tok)
-	{
-	case TOKEN_EOF:	        return;
-	case TOKEN_RIGHT_PAREN: read_error_nr(sc, "unexpected close paren");
-	case TOKEN_COMMA:	read_error_nr(sc, "unexpected comma");
-	default:
-	  sc->value = read_expression(sc);
-	  sc->current_line = port_line_number(current_input_port(sc));  /* this info is used to track down missing close parens */
-	  sc->current_file = port_filename(current_input_port(sc));
-	}}
+        {
+        case TOKEN_EOF:                return;
+        case TOKEN_RIGHT_PAREN: read_error_nr(sc, "unexpected close paren");
+        case TOKEN_COMMA:        read_error_nr(sc, "unexpected comma");
+        default:
+          sc->value = read_expression(sc);
+          sc->current_line = port_line_number(current_input_port(sc));  /* this info is used to track down missing close parens */
+          sc->current_file = port_filename(current_input_port(sc));
+        }}
 }
 
 static bool op_read_quasiquote(s7_scheme *sc)
@@ -90937,8 +90937,8 @@ static bool op_load_close_and_pop_if_eof(s7_scheme *sc)
     {
       push_stack_op_let(sc, OP_LOAD_CLOSE_AND_POP_IF_EOF); /* was push args, code */
       if ((!is_string_port(current_input_port(sc))) ||
-	  (port_position(current_input_port(sc)) < port_data_size(current_input_port(sc))))
-	push_stack_op_let(sc, OP_READ_INTERNAL);
+          (port_position(current_input_port(sc)) < port_data_size(current_input_port(sc))))
+        push_stack_op_let(sc, OP_READ_INTERNAL);
       else sc->tok = TOKEN_EOF;
       sc->code = sc->value;
       return(true);             /* we read an expression, now evaluate it, and return to read the next */
@@ -90965,12 +90965,12 @@ static goto_t op_read_dot(s7_scheme *sc)
   if (c != TOKEN_RIGHT_PAREN) /* '(1 . (2) 3) -> '(1 2 3), Guile says "missing close paren" */
     {
       if (is_pair(sc->value))
-	{
-	  for (s7_pointer p = sc->value; is_pair(p); p = cdr(p))
-	    sc->args = cons(sc, car(p), sc->args);
-	  sc->tok = c;
-	  return(goto_read_tok);
-	}
+        {
+          for (s7_pointer p = sc->value; is_pair(p); p = cdr(p))
+            sc->args = cons(sc, car(p), sc->args);
+          sc->tok = c;
+          return(goto_read_tok);
+        }
       back_up_stack(sc);
       read_error_nr(sc, "stray dot?");            /* (+ 1 . 2 3) or (list . ) */
     }
@@ -91086,36 +91086,36 @@ static bool op_unknown(s7_scheme *sc)
     case T_CLOSURE:
     case T_CLOSURE_STAR:
       if (!has_methods(f))
-	{
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  if (is_null(closure_args(f)))
-	    {
-	      s7_pointer body = closure_body(f);
-	      bool one_form = is_null(cdr(body));
-	      bool safe_case = is_safe_closure(f);
-	      set_opt1_lambda_add(code, f);
-	      if (one_form)
-		{
-		  if ((safe_case) && (is_fxable(sc, car(body))))
-		    {
-		      set_safe_closure(f);   /* safe because no args so no reference to funclet? needed because op_safe_thunk_a will check for it */
-		      fx_annotate_arg(sc, body, sc->curlet);
-		      set_safe_optimize_op(code, hop + OP_SAFE_THUNK_A);
-		      set_closure_one_form_fx_arg(f);
-		      sc->value = fx_safe_thunk_a(sc, sc->code);
-		      return(false);
-		    }
-		  clear_has_fx(code);
-		}
-	      set_safe_optimize_op(code, hop + ((safe_case) ? OP_SAFE_THUNK : ((one_form) ? OP_THUNK_O : OP_THUNK)));
-	      return(true);
-	    }
-	  if (is_closure_star(f))
-	    {
-	      set_safe_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_STAR_NA_0 : OP_CLOSURE_STAR_NA));
-	      set_opt1_lambda_add(code, f);
-	      return(true);
-	    }}
+        {
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          if (is_null(closure_args(f)))
+            {
+              s7_pointer body = closure_body(f);
+              bool one_form = is_null(cdr(body));
+              bool safe_case = is_safe_closure(f);
+              set_opt1_lambda_add(code, f);
+              if (one_form)
+                {
+                  if ((safe_case) && (is_fxable(sc, car(body))))
+                    {
+                      set_safe_closure(f);   /* safe because no args so no reference to funclet? needed because op_safe_thunk_a will check for it */
+                      fx_annotate_arg(sc, body, sc->curlet);
+                      set_safe_optimize_op(code, hop + OP_SAFE_THUNK_A);
+                      set_closure_one_form_fx_arg(f);
+                      sc->value = fx_safe_thunk_a(sc, sc->code);
+                      return(false);
+                    }
+                  clear_has_fx(code);
+                }
+              set_safe_optimize_op(code, hop + ((safe_case) ? OP_SAFE_THUNK : ((one_form) ? OP_THUNK_O : OP_THUNK)));
+              return(true);
+            }
+          if (is_closure_star(f))
+            {
+              set_safe_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_STAR_NA_0 : OP_CLOSURE_STAR_NA));
+              set_opt1_lambda_add(code, f);
+              return(true);
+            }}
       break;
 
     case T_GOTO:       return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_GOTO));
@@ -91125,8 +91125,8 @@ static bool op_unknown(s7_scheme *sc)
 
     default:
       if ((is_symbol(car(code))) &&
-	  (!is_slot(s7_slot(sc, car(code)))))
-	unbound_variable_error_nr(sc, car(code));
+          (!is_slot(s7_slot(sc, car(code)))))
+        unbound_variable_error_nr(sc, car(code));
     }
   return(fixup_unknown_op(sc, code, f, OP_S));
 }
@@ -91141,16 +91141,16 @@ static bool fxify_closure_star_g(s7_scheme *sc, s7_pointer f, s7_pointer code)
       fx_annotate_arg(sc, cdr(code), sc->curlet);
       set_opt3_arglen(cdr(code), 1);
       if ((safe_case) && (is_null(cdr(closure_args(f)))))
-	set_optimize_op(code, hop + OP_SAFE_CLOSURE_STAR_A1);
+        set_optimize_op(code, hop + OP_SAFE_CLOSURE_STAR_A1);
       else
-	if (lambda_has_simple_defaults(f))
-	  {
-	    if (arglist_has_rest(sc, closure_args(f)))
-	      fixup_unknown_op(sc, code, f, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_1 : OP_CLOSURE_STAR_NA));
-	    else fixup_unknown_op(sc, code, f, hop + ((safe_case) ?
-						      ((is_null(cdr(closure_args(f)))) ? OP_SAFE_CLOSURE_STAR_A1 : OP_SAFE_CLOSURE_STAR_A) : OP_CLOSURE_STAR_A));
-	    return(true);
-	  }
+        if (lambda_has_simple_defaults(f))
+          {
+            if (arglist_has_rest(sc, closure_args(f)))
+              fixup_unknown_op(sc, code, f, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_1 : OP_CLOSURE_STAR_NA));
+            else fixup_unknown_op(sc, code, f, hop + ((safe_case) ?
+                                                      ((is_null(cdr(closure_args(f)))) ? OP_SAFE_CLOSURE_STAR_A1 : OP_SAFE_CLOSURE_STAR_A) : OP_CLOSURE_STAR_A));
+            return(true);
+          }
       fixup_unknown_op(sc, code, f, hop + ((safe_case) ? OP_SAFE_CLOSURE_STAR_NA_1 : OP_CLOSURE_STAR_NA));
       return(true);
     }
@@ -91175,23 +91175,23 @@ static bool op_unknown_closure_s(s7_scheme *sc, s7_pointer f, s7_pointer code)
   if (is_unknopt(code))
     {
       switch (op_no_hop(code))
-	{
-	case OP_CLOSURE_S:
-	  set_optimize_op(code, (is_safe_closure(f)) ? ((one_form) ? OP_SAFE_CLOSURE_S_O : OP_SAFE_CLOSURE_S) :  OP_S_G); break;
-	case OP_CLOSURE_S_O:
-	case OP_SAFE_CLOSURE_S:
-	  set_optimize_op(code, ((one_form) ? OP_CLOSURE_S_O : OP_CLOSURE_S)); break;
-	case OP_SAFE_CLOSURE_S_O:
-	case OP_SAFE_CLOSURE_S_A:
-	case OP_SAFE_CLOSURE_S_TO_S:
-	case OP_SAFE_CLOSURE_S_TO_SC:
-	  set_optimize_op(code, (is_safe_closure(f)) ?
-			  ((one_form) ? OP_SAFE_CLOSURE_S_O : OP_SAFE_CLOSURE_S) :
-			  ((one_form) ? OP_CLOSURE_S_O : OP_CLOSURE_S));
-	  break;
-	default:
-	  set_optimize_op(code, OP_S_G); break;
-	}
+        {
+        case OP_CLOSURE_S:
+          set_optimize_op(code, (is_safe_closure(f)) ? ((one_form) ? OP_SAFE_CLOSURE_S_O : OP_SAFE_CLOSURE_S) :  OP_S_G); break;
+        case OP_CLOSURE_S_O:
+        case OP_SAFE_CLOSURE_S:
+          set_optimize_op(code, ((one_form) ? OP_CLOSURE_S_O : OP_CLOSURE_S)); break;
+        case OP_SAFE_CLOSURE_S_O:
+        case OP_SAFE_CLOSURE_S_A:
+        case OP_SAFE_CLOSURE_S_TO_S:
+        case OP_SAFE_CLOSURE_S_TO_SC:
+          set_optimize_op(code, (is_safe_closure(f)) ?
+                          ((one_form) ? OP_SAFE_CLOSURE_S_O : OP_SAFE_CLOSURE_S) :
+                          ((one_form) ? OP_CLOSURE_S_O : OP_CLOSURE_S));
+          break;
+        default:
+          set_optimize_op(code, OP_S_G); break;
+        }
       set_opt1_lambda_add(code, f);
       return(true);
     }
@@ -91202,7 +91202,7 @@ static bool op_unknown_closure_s(s7_scheme *sc, s7_pointer f, s7_pointer code)
       set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_S);
     else
       if (is_fxable(sc, car(body)))
-	fxify_closure_s(sc, f, code, sc->curlet, hop);
+        fxify_closure_s(sc, f, code, sc->curlet, hop);
       else set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_S_O);
   /* hop if is_constant(sc, car(code)) is not foolproof here (see t967.scm):
    *    (define (f) (define-constant (f1) ... (f1))...) where each call on f makes a different f1
@@ -91234,20 +91234,20 @@ static bool op_unknown_s(s7_scheme *sc)
     case T_C_RST_NO_REQ_FUNCTION:
       set_c_function(code, f);
       if (is_safe_procedure(f))
-	{
-	  set_optimize_op(code, OP_SAFE_C_S);
-	  sc->value = fx_c_s(sc, sc->code);
-	}
+        {
+          set_optimize_op(code, OP_SAFE_C_S);
+          sc->value = fx_c_s(sc, sc->code);
+        }
       else
-	{
-	  set_optimize_op(code, OP_C_S);
-	  op_c_s(sc);
-	}
+        {
+          set_optimize_op(code, OP_C_S);
+          op_c_s(sc);
+        }
       return(false);
 
     case T_CLOSURE:
       if ((!has_methods(f)) && (closure_arity_to_int(sc, f) == 1))
-	return(op_unknown_closure_s(sc, f, code));
+        return(op_unknown_closure_s(sc, f, code));
       break;
 
     case T_CLOSURE_STAR:
@@ -91273,10 +91273,10 @@ static bool op_unknown_s(s7_scheme *sc)
 
     case T_C_OBJECT:
       if (s7_is_aritable(sc, f, 1))
-	{
-	  fx_annotate_arg(sc, cdr(code), sc->curlet);
-	  return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_C_OBJECT_REF_A));
-	}
+        {
+          fx_annotate_arg(sc, cdr(code), sc->curlet);
+          return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_C_OBJECT_REF_A));
+        }
       break;
 
     case T_LET:
@@ -91318,30 +91318,30 @@ static bool op_unknown_a(s7_scheme *sc)
       clear_has_fx(code);
       set_c_function(code, f);
       if (is_safe_procedure(f))
-	{
-	  set_optimize_op(code, OP_SAFE_C_A);
-	  sc->value = fx_c_a(sc, code);
-	}
+        {
+          set_optimize_op(code, OP_SAFE_C_A);
+          sc->value = fx_c_a(sc, code);
+        }
       else
-	{
-	  set_optimize_op(code, OP_C_A);
-	  op_c_a(sc);
-	}
+        {
+          set_optimize_op(code, OP_C_A);
+          op_c_a(sc);
+        }
       return(false);
 
     case T_CLOSURE:
       if ((!has_methods(f)) &&
-	  (closure_arity_to_int(sc, f) == 1))
-	{
-	  s7_pointer body = closure_body(f);
-	  bool safe_case = is_safe_closure(f);
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  bool one_form = is_null(cdr(body));
-
-	  fxify_closure_a(sc, f, one_form, safe_case, hop, code, sc->curlet);
-	  set_opt1_lambda_add(code, f);
-	  return(true);
-	}
+          (closure_arity_to_int(sc, f) == 1))
+        {
+          s7_pointer body = closure_body(f);
+          bool safe_case = is_safe_closure(f);
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          bool one_form = is_null(cdr(body));
+
+          fxify_closure_a(sc, f, one_form, safe_case, hop, code, sc->curlet);
+          set_opt1_lambda_add(code, f);
+          return(true);
+        }
       break;
 
     case T_CLOSURE_STAR:
@@ -91364,15 +91364,15 @@ static bool op_unknown_a(s7_scheme *sc)
 
     case T_LET:
       {
-	s7_pointer arg1 = cadr(code);
-	if ((is_quoted_symbol(arg1)) || (is_symbol_and_keyword(arg1)))
-	  {
-	    s7_pointer sym = (is_pair(arg1)) ? cadr(arg1) : arg1;
-	    if (is_keyword(sym)) sym = keyword_symbol(sym);
-	    set_opt3_con(code, sym);
-	    return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_LET_REF_C));
-	  }
-	return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_LET_REF_A)); /* "A" might be a symbol */
+        s7_pointer arg1 = cadr(code);
+        if ((is_quoted_symbol(arg1)) || (is_symbol_and_keyword(arg1)))
+          {
+            s7_pointer sym = (is_pair(arg1)) ? cadr(arg1) : arg1;
+            if (is_keyword(sym)) sym = keyword_symbol(sym);
+            set_opt3_con(code, sym);
+            return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_LET_REF_C));
+          }
+        return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_LET_REF_A)); /* "A" might be a symbol */
       }
 
     default: break;
@@ -91406,27 +91406,27 @@ static bool op_unknown_gg(s7_scheme *sc)
       if (!(c_function_is_aritable(f, 2))) break;
     case T_C_RST_NO_REQ_FUNCTION:
       if (is_safe_procedure(f))
-	{
-	  if (s1)
-	    {
-	      set_optimize_op(code, (s2) ? OP_SAFE_C_SS : OP_SAFE_C_SC);
-	      if (s2)
-		set_opt2_sym(cdr(code), caddr(code));
-	      else set_opt2_con(cdr(code), caddr(code));
-	    }
-	  else
-	    {
-	      set_optimize_op(code, (s2) ? OP_SAFE_C_CS : OP_SAFE_C_NC);
-	      if (s2)
-		{
-		  set_opt1_con(cdr(code), (is_pair(cadr(code))) ? cadadr(code) : cadr(code));
-		  set_opt2_sym(cdr(code), caddr(code));
-		}}}
+        {
+          if (s1)
+            {
+              set_optimize_op(code, (s2) ? OP_SAFE_C_SS : OP_SAFE_C_SC);
+              if (s2)
+                set_opt2_sym(cdr(code), caddr(code));
+              else set_opt2_con(cdr(code), caddr(code));
+            }
+          else
+            {
+              set_optimize_op(code, (s2) ? OP_SAFE_C_CS : OP_SAFE_C_NC);
+              if (s2)
+                {
+                  set_opt1_con(cdr(code), (is_pair(cadr(code))) ? cadadr(code) : cadr(code));
+                  set_opt2_sym(cdr(code), caddr(code));
+                }}}
       else
-	{
-	  set_optimize_op(code, (is_semisafe(f)) ? OP_CL_NA : OP_C_NA);
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	}
+        {
+          set_optimize_op(code, (is_semisafe(f)) ? OP_CL_NA : OP_C_NA);
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+        }
       set_opt3_arglen(cdr(code), 2);
       set_c_function(code, f);
       return(true);
@@ -91434,71 +91434,71 @@ static bool op_unknown_gg(s7_scheme *sc)
     case T_CLOSURE:
       if (has_methods(f)) break;
       if (closure_arity_to_int(sc, f) == 2)
-	{
-	  s7_pointer body = closure_body(f);
-	  bool safe_case = is_safe_closure(f);
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  bool one_form = is_null(cdr(body));
-
-	  if ((s1) && (s2))
-	    {
-	      set_opt2_sym(code, caddr(code));
-	      if (!one_form)
-		set_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_SS : OP_CLOSURE_SS));
-	      else
-		if (!safe_case)
-		  set_optimize_op(code, hop + OP_CLOSURE_SS_O);
-		else
-		  if (!is_fxable(sc, car(body)))
-		    set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_SS_O);
-		  else
-		    {
-		      fx_annotate_arg(sc, body, sc->curlet);
-		      fx_tree(sc, body, car(closure_args(f)), cadr(closure_args(f)), NULL, false);
-		      set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_SS_A);
-		      set_closure_one_form_fx_arg(f);
-		    }}
-	  else
-	    if (s1)
-	      {
-		set_opt2_con(code, caddr(code));
-		if (one_form)
-		  set_safe_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC_O : OP_CLOSURE_SC_O));
-		else set_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC : OP_CLOSURE_SC));
-	      }
-	    else
-	      {
-		set_opt3_arglen(cdr(code), 2);
-		fx_annotate_args(sc, cdr(code), sc->curlet);
-		if (safe_case)
-		  set_safe_optimize_op(code, hop + ((one_form) ? OP_SAFE_CLOSURE_AA_O : OP_SAFE_CLOSURE_AA));
-		else set_safe_optimize_op(code, hop + ((one_form) ? OP_CLOSURE_AA_O : OP_CLOSURE_AA));
-	      }
-	  set_opt1_lambda_add(code, f);
-	  return(true);
-	}
+        {
+          s7_pointer body = closure_body(f);
+          bool safe_case = is_safe_closure(f);
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          bool one_form = is_null(cdr(body));
+
+          if ((s1) && (s2))
+            {
+              set_opt2_sym(code, caddr(code));
+              if (!one_form)
+                set_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_SS : OP_CLOSURE_SS));
+              else
+                if (!safe_case)
+                  set_optimize_op(code, hop + OP_CLOSURE_SS_O);
+                else
+                  if (!is_fxable(sc, car(body)))
+                    set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_SS_O);
+                  else
+                    {
+                      fx_annotate_arg(sc, body, sc->curlet);
+                      fx_tree(sc, body, car(closure_args(f)), cadr(closure_args(f)), NULL, false);
+                      set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_SS_A);
+                      set_closure_one_form_fx_arg(f);
+                    }}
+          else
+            if (s1)
+              {
+                set_opt2_con(code, caddr(code));
+                if (one_form)
+                  set_safe_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC_O : OP_CLOSURE_SC_O));
+                else set_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_SC : OP_CLOSURE_SC));
+              }
+            else
+              {
+                set_opt3_arglen(cdr(code), 2);
+                fx_annotate_args(sc, cdr(code), sc->curlet);
+                if (safe_case)
+                  set_safe_optimize_op(code, hop + ((one_form) ? OP_SAFE_CLOSURE_AA_O : OP_SAFE_CLOSURE_AA));
+                else set_safe_optimize_op(code, hop + ((one_form) ? OP_CLOSURE_AA_O : OP_CLOSURE_AA));
+              }
+          set_opt1_lambda_add(code, f);
+          return(true);
+        }
       break;
 
     case T_CLOSURE_STAR:
       if ((closure_star_arity_to_int(sc, f) != 0) &&
-	  (closure_star_arity_to_int(sc, f) != 1))
-	{
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	  if (!has_methods(f))
-	    {
-	      fixup_closure_star_aa(sc, f, code, (is_immutable_and_stable(sc, car(code))) ? 1 : 0);
-	      set_opt1_lambda_add(code, f);
-	    }
-	  else set_optimize_op(code, OP_S_AA);
-	  return(true);
-	}
+          (closure_star_arity_to_int(sc, f) != 1))
+        {
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+          if (!has_methods(f))
+            {
+              fixup_closure_star_aa(sc, f, code, (is_immutable_and_stable(sc, car(code))) ? 1 : 0);
+              set_opt1_lambda_add(code, f);
+            }
+          else set_optimize_op(code, OP_S_AA);
+          return(true);
+        }
       break;
 
     case T_INT_VECTOR: case T_FLOAT_VECTOR: case T_VECTOR: case T_BYTE_VECTOR: case T_PAIR:
       set_opt3_arglen(cdr(code), 2);
       fx_annotate_args(sc, cdr(code), sc->curlet);
       if ((!is_pair(f)) && (vector_rank(f) != 2))
-	return(fixup_unknown_op(sc, code, f, OP_S_AA));
+        return(fixup_unknown_op(sc, code, f, OP_S_AA));
       return(fixup_unknown_op(sc, code, f, (is_pair(f)) ? OP_IMPLICIT_PAIR_REF_AA : OP_IMPLICIT_VECTOR_REF_AA));
 
     case T_HASH_TABLE:
@@ -91537,48 +91537,48 @@ static bool op_unknown_ns(s7_scheme *sc)
       if (!(c_function_is_aritable(f, num_args))) break;
     case T_C_RST_NO_REQ_FUNCTION:
       if (is_safe_procedure(f))
-	{
-	  if (num_args == 3)
-	    {
-	      set_safe_optimize_op(code, OP_SAFE_C_SSS);
-	      set_opt1_sym(cdr(code), caddr(code));
-	      set_opt2_sym(cdr(code), cadddr(code));
-	    }
-	  else set_safe_optimize_op(code, OP_SAFE_C_NS);
-	}
+        {
+          if (num_args == 3)
+            {
+              set_safe_optimize_op(code, OP_SAFE_C_SSS);
+              set_opt1_sym(cdr(code), caddr(code));
+              set_opt2_sym(cdr(code), cadddr(code));
+            }
+          else set_safe_optimize_op(code, OP_SAFE_C_NS);
+        }
       else
-	{
-	  set_optimize_op(code, (is_semisafe(f)) ? OP_CL_NA : OP_C_NA);
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	}
+        {
+          set_optimize_op(code, (is_semisafe(f)) ? OP_CL_NA : OP_C_NA);
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+        }
       set_c_function(code, f);
       return(true);
 
     case T_CLOSURE:
       if ((!has_methods(f)) &&
-	  (closure_arity_to_int(sc, f) == num_args))
-	{
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  bool one_form = is_null(cdr(closure_body(f)));
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	  if (num_args == 3)
-	    return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_3S : ((one_form) ? OP_CLOSURE_3S_O : OP_CLOSURE_3S))));
-	  if (num_args == 4)
-	    return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_NS : ((one_form) ? OP_CLOSURE_4S_O : OP_CLOSURE_4S))));
-	  return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_NS : ((num_args == 5) ? OP_CLOSURE_5S : OP_CLOSURE_NS))));
-	}
+          (closure_arity_to_int(sc, f) == num_args))
+        {
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          bool one_form = is_null(cdr(closure_body(f)));
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+          if (num_args == 3)
+            return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_3S : ((one_form) ? OP_CLOSURE_3S_O : OP_CLOSURE_3S))));
+          if (num_args == 4)
+            return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_NS : ((one_form) ? OP_CLOSURE_4S_O : OP_CLOSURE_4S))));
+          return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_NS : ((num_args == 5) ? OP_CLOSURE_5S : OP_CLOSURE_NS))));
+        }
       break;
 
     case T_CLOSURE_STAR:
       if ((!has_methods(f)) &&
-	  ((closure_star_arity_to_int(sc, f) < 0) || ((closure_star_arity_to_int(sc, f) * 2) >= num_args)))
-	{
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	  if ((is_safe_closure(f)) && (num_args == 3) && (closure_star_arity_to_int(sc, f) == 3))
-	    return(fixup_unknown_op(sc, code, f, OP_SAFE_CLOSURE_STAR_3A));
-	  return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA)));
-	}
+          ((closure_star_arity_to_int(sc, f) < 0) || ((closure_star_arity_to_int(sc, f) * 2) >= num_args)))
+        {
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+          if ((is_safe_closure(f)) && (num_args == 3) && (closure_star_arity_to_int(sc, f) == 3))
+            return(fixup_unknown_op(sc, code, f, OP_SAFE_CLOSURE_STAR_3A));
+          return(fixup_unknown_op(sc, code, f, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_STAR_NA : OP_CLOSURE_STAR_NA)));
+        }
       break;
 
     case T_BACRO: case T_MACRO:
@@ -91605,56 +91605,56 @@ static bool op_unknown_aa(s7_scheme *sc)
       if (!(c_function_is_aritable(f, 2))) break;
     case T_C_RST_NO_REQ_FUNCTION:
       if (is_safe_procedure(f)) /* why is this different from unknown_a and unknown_na? */
-	{
-	  if (!safe_c_aa_to_ag_ga(sc, code, 0))
-	    {
-	      set_safe_optimize_op(code, OP_SAFE_C_AA);
-	      set_opt3_pair(code, cddr(code));
-	    }}
+        {
+          if (!safe_c_aa_to_ag_ga(sc, code, 0))
+            {
+              set_safe_optimize_op(code, OP_SAFE_C_AA);
+              set_opt3_pair(code, cddr(code));
+            }}
       else set_optimize_op(code, (is_semisafe(f)) ? OP_CL_NA : OP_C_NA);
       set_c_function(code, f);
       return(true);
 
     case T_CLOSURE:
       if ((!has_methods(f)) &&
-	  (closure_arity_to_int(sc, f) == 2))
-	{
-	  s7_pointer body = closure_body(f);
-	  bool safe_case = is_safe_closure(f);
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  bool one_form = is_null(cdr(body));
-	  if (!one_form)
-	    set_safe_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_AA : OP_CLOSURE_AA));
-	  else
-	    if (!safe_case)
-	      set_optimize_op(code, hop + OP_CLOSURE_AA_O);
-	    else
-	      if (!is_fxable(sc, car(body)))
-		set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_AA_O);
-	      else
-		{
-		  fx_annotate_arg(sc, body, sc->curlet);
-		  set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_AA_A);
-		  set_closure_one_form_fx_arg(f);
-		}
-	  if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, cdr(code));
-	  set_opt1_lambda_add(code, f);
-	  return(true);
-	}
+          (closure_arity_to_int(sc, f) == 2))
+        {
+          s7_pointer body = closure_body(f);
+          bool safe_case = is_safe_closure(f);
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          bool one_form = is_null(cdr(body));
+          if (!one_form)
+            set_safe_optimize_op(code, hop + ((safe_case) ? OP_SAFE_CLOSURE_AA : OP_CLOSURE_AA));
+          else
+            if (!safe_case)
+              set_optimize_op(code, hop + OP_CLOSURE_AA_O);
+            else
+              if (!is_fxable(sc, car(body)))
+                set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_AA_O);
+              else
+                {
+                  fx_annotate_arg(sc, body, sc->curlet);
+                  set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_AA_A);
+                  set_closure_one_form_fx_arg(f);
+                }
+          if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, cdr(code));
+          set_opt1_lambda_add(code, f);
+          return(true);
+        }
       break;
 
     case T_CLOSURE_STAR:
       if (!has_methods(f))
-	{
-	  fixup_closure_star_aa(sc, f, code, (is_immutable_and_stable(sc, car(code))) ? 1 : 0);
-	  set_opt1_lambda_add(code, f);
-	}
+        {
+          fixup_closure_star_aa(sc, f, code, (is_immutable_and_stable(sc, car(code))) ? 1 : 0);
+          set_opt1_lambda_add(code, f);
+        }
       else set_optimize_op(code, OP_S_AA);
       return(true);
 
     case T_INT_VECTOR: case T_FLOAT_VECTOR: case T_VECTOR: case T_BYTE_VECTOR:
       if (vector_rank(f) != 2)
-	return(fixup_unknown_op(sc, code, f, OP_S_AA));
+        return(fixup_unknown_op(sc, code, f, OP_S_AA));
       return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_VECTOR_REF_AA));
 
     case T_PAIR:       return(fixup_unknown_op(sc, code, f, OP_IMPLICIT_PAIR_REF_AA));
@@ -91694,30 +91694,30 @@ static bool op_unknown_na(s7_scheme *sc)
       if (!(c_function_is_aritable(f, num_args))) break;
     case T_C_RST_NO_REQ_FUNCTION:
       if (is_safe_procedure(f))
-	{
-	  if (num_args == 3)
-	    {
-	      int32_t pairs = 0, symbols = 0, quotes = 0; /* specialize aaa->ssc etc, this makes less difference than I expected */
-	      for (s7_pointer p = cdr(code); is_pair(p); p = cdr(p))
-		{
-		  s7_pointer car_p = car(p);
-		  if (is_normal_happy_symbol(sc, car_p))
-		    symbols++;
-		  else
-		    if (is_pair(car_p))
-		      {
-			pairs++;
-			if (is_proper_quote(sc, car_p))
-			  quotes++;
-		      }}
-	      if (optimize_safe_c_func_three_args(sc, code, f, 0 /* hop */, pairs, symbols, quotes, sc->curlet) == OPT_T)
-		return(true);
-	      set_opt3_pair(cdr(code), cdddr(code));
-	      set_opt3_pair(code, cddr(code));
-	      set_safe_optimize_op(code, OP_SAFE_C_AAA);
-	    }
-	  else set_safe_optimize_op(code, (num_args == 4) ? OP_SAFE_C_4A : OP_SAFE_C_NA);
-	}
+        {
+          if (num_args == 3)
+            {
+              int32_t pairs = 0, symbols = 0, quotes = 0; /* specialize aaa->ssc etc, this makes less difference than I expected */
+              for (s7_pointer p = cdr(code); is_pair(p); p = cdr(p))
+                {
+                  s7_pointer car_p = car(p);
+                  if (is_normal_happy_symbol(sc, car_p))
+                    symbols++;
+                  else
+                    if (is_pair(car_p))
+                      {
+                        pairs++;
+                        if (is_proper_quote(sc, car_p))
+                          quotes++;
+                      }}
+              if (optimize_safe_c_func_three_args(sc, code, f, 0 /* hop */, pairs, symbols, quotes, sc->curlet) == OPT_T)
+                return(true);
+              set_opt3_pair(cdr(code), cdddr(code));
+              set_opt3_pair(code, cddr(code));
+              set_safe_optimize_op(code, OP_SAFE_C_AAA);
+            }
+          else set_safe_optimize_op(code, (num_args == 4) ? OP_SAFE_C_4A : OP_SAFE_C_NA);
+        }
       else set_safe_optimize_op(code, (is_semisafe(f)) ? OP_CL_NA : OP_C_NA);
       fx_annotate_args(sc, cdr(code), sc->curlet);
       set_c_function(code, f);
@@ -91725,65 +91725,65 @@ static bool op_unknown_na(s7_scheme *sc)
 
     case T_CLOSURE:
       if ((!has_methods(f)) &&
-	  (closure_arity_to_int(sc, f) == num_args))
-	{
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  fx_annotate_args(sc, cdr(code), sc->curlet);
-	  if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, cdr(code));
-	  if (is_safe_closure(f))
-	    {
-	      if (num_args != 3)
-		set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_NA);
-	      else
-		if (is_normal_happy_symbol(sc, cadr(code)))
-		  set_safe_optimize_op(code, hop + ((is_normal_happy_symbol(sc, caddr(code))) ? OP_SAFE_CLOSURE_SSA : OP_SAFE_CLOSURE_SAA));
-		else set_safe_optimize_op(code, hop + (((!is_pair(caddr(code))) && (!is_pair(cadddr(code)))) ? OP_SAFE_CLOSURE_AGG : OP_SAFE_CLOSURE_3A));
-	    }
-	  else
-	    if (num_args != 3)
-	      set_safe_optimize_op(code, hop + ((num_args == 4) ? OP_CLOSURE_4A : OP_CLOSURE_NA));
-	    else
-	      if ((is_normal_happy_symbol(sc, caddr(code))) && (is_normal_happy_symbol(sc, cadddr(code))))
-		set_safe_optimize_op(code, hop + OP_CLOSURE_ASS);
-	      else
-		if (is_normal_happy_symbol(sc, cadr(code)))
-		  set_safe_optimize_op(code, hop + ((is_normal_happy_symbol(sc, cadddr(code))) ? OP_CLOSURE_SAS : OP_CLOSURE_SAA));
-		else
-		  if (is_normal_happy_symbol(sc, caddr(code)))
-		    set_safe_optimize_op(code, hop + OP_CLOSURE_ASA);
-		  else set_safe_optimize_op(code, hop + ((is_normal_happy_symbol(sc, cadddr(code))) ? OP_CLOSURE_AAS : OP_CLOSURE_3A));
-	  set_opt1_lambda_add(code, f);
-	  return(true);
-	}
+          (closure_arity_to_int(sc, f) == num_args))
+        {
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          fx_annotate_args(sc, cdr(code), sc->curlet);
+          if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, cdr(code));
+          if (is_safe_closure(f))
+            {
+              if (num_args != 3)
+                set_safe_optimize_op(code, hop + OP_SAFE_CLOSURE_NA);
+              else
+                if (is_normal_happy_symbol(sc, cadr(code)))
+                  set_safe_optimize_op(code, hop + ((is_normal_happy_symbol(sc, caddr(code))) ? OP_SAFE_CLOSURE_SSA : OP_SAFE_CLOSURE_SAA));
+                else set_safe_optimize_op(code, hop + (((!is_pair(caddr(code))) && (!is_pair(cadddr(code)))) ? OP_SAFE_CLOSURE_AGG : OP_SAFE_CLOSURE_3A));
+            }
+          else
+            if (num_args != 3)
+              set_safe_optimize_op(code, hop + ((num_args == 4) ? OP_CLOSURE_4A : OP_CLOSURE_NA));
+            else
+              if ((is_normal_happy_symbol(sc, caddr(code))) && (is_normal_happy_symbol(sc, cadddr(code))))
+                set_safe_optimize_op(code, hop + OP_CLOSURE_ASS);
+              else
+                if (is_normal_happy_symbol(sc, cadr(code)))
+                  set_safe_optimize_op(code, hop + ((is_normal_happy_symbol(sc, cadddr(code))) ? OP_CLOSURE_SAS : OP_CLOSURE_SAA));
+                else
+                  if (is_normal_happy_symbol(sc, caddr(code)))
+                    set_safe_optimize_op(code, hop + OP_CLOSURE_ASA);
+                  else set_safe_optimize_op(code, hop + ((is_normal_happy_symbol(sc, cadddr(code))) ? OP_CLOSURE_AAS : OP_CLOSURE_3A));
+          set_opt1_lambda_add(code, f);
+          return(true);
+        }
       if (is_symbol(closure_args(f)))
-	{
-	  optimize_closure_sym(sc, code, f, 0, num_args, sc->curlet);
-	  if (optimize_op(code) == OP_ANY_CLOSURE_SYM) return(true);
-	}
+        {
+          optimize_closure_sym(sc, code, f, 0, num_args, sc->curlet);
+          if (optimize_op(code) == OP_ANY_CLOSURE_SYM) return(true);
+        }
       break;
 
     case T_CLOSURE_STAR:
       if ((!has_methods(f)) &&
-	  ((closure_star_arity_to_int(sc, f) < 0) || ((closure_star_arity_to_int(sc, f) * 2) >= num_args)))
-	{
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  if (num_args > 0)
-	    {
-	      set_opt3_arglen(cdr(code), num_args);
-	      fx_annotate_args(sc, cdr(code), sc->curlet);
-	      if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, cdr(code));
-	    }
-	  if (is_safe_closure(f))
-	    switch (num_args)
-	      {
-	      case 0: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA_0));
-	      case 1: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA_1));
-	      case 2: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA_2));
-	      case 3: if (closure_star_arity_to_int(sc, f) == 3) return(fixup_unknown_op(sc, code, f, OP_SAFE_CLOSURE_STAR_3A));
-	      default: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA));
-	      }
-	  return(fixup_unknown_op(sc, code, f, hop + OP_CLOSURE_STAR_NA));
-	}
+          ((closure_star_arity_to_int(sc, f) < 0) || ((closure_star_arity_to_int(sc, f) * 2) >= num_args)))
+        {
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          if (num_args > 0)
+            {
+              set_opt3_arglen(cdr(code), num_args);
+              fx_annotate_args(sc, cdr(code), sc->curlet);
+              if ((is_fx_treeable(cdr(code))) && (tis_slot(let_slots(sc->curlet)))) fx_curlet_tree(sc, cdr(code));
+            }
+          if (is_safe_closure(f))
+            switch (num_args)
+              {
+              case 0: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA_0));
+              case 1: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA_1));
+              case 2: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA_2));
+              case 3: if (closure_star_arity_to_int(sc, f) == 3) return(fixup_unknown_op(sc, code, f, OP_SAFE_CLOSURE_STAR_3A));
+              default: return(fixup_unknown_op(sc, code, f, hop + OP_SAFE_CLOSURE_STAR_NA));
+              }
+          return(fixup_unknown_op(sc, code, f, hop + OP_CLOSURE_STAR_NA));
+        }
       break;
 
     case T_MACRO:      return(fixup_unknown_op(sc, code, f, fixup_macro_d(sc, OP_MACRO_D, f)));
@@ -91804,7 +91804,7 @@ static bool op_unknown_np(s7_scheme *sc)
 
   if (!f) unbound_variable_error_nr(sc, car(sc->code));
   if (SHOW_EVAL_OPS) fprintf(stderr, "  %s[%d]: %s %s %s\n",
-			     __func__, __LINE__, display_truncated(f), type_name(sc, f, NO_ARTICLE), display_truncated(sc->code));
+                             __func__, __LINE__, display_truncated(f), type_name(sc, f, NO_ARTICLE), display_truncated(sc->code));
 
   switch (type(f))
     {
@@ -91812,71 +91812,71 @@ static bool op_unknown_np(s7_scheme *sc)
       if (!(c_function_is_aritable(f, num_args))) break;
     case T_C_RST_NO_REQ_FUNCTION:
       if (num_args == 1)
-	set_any_c_np(sc, f, code, sc->curlet, num_args, (is_safe_procedure(f)) ? OP_SAFE_C_P : OP_C_P);
+        set_any_c_np(sc, f, code, sc->curlet, num_args, (is_safe_procedure(f)) ? OP_SAFE_C_P : OP_C_P);
       else
-	if ((num_args == 2) && (is_safe_procedure(f)))
-	  {
-	    set_any_c_np(sc, f, code, sc->curlet, 2, OP_SAFE_C_PP);
-	    opt_sp_1(sc, c_function_call(f), code);
-	  }
-	else
-	  if ((num_args == 3) &&
-	      ((is_safe_procedure(f)) ||
-	       ((is_semisafe(f)) &&
-		(((car(code) != sc->assoc_symbol) && (car(code) != sc->member_symbol)) ||
-		 (unsafe_is_safe(sc, cadddr(code), sc->curlet))))))
-	    set_any_c_np(sc, f, code, sc->curlet, 3, OP_SAFE_C_3P);
-	  else set_any_c_np(sc, f, code, sc->curlet, num_args, OP_ANY_C_NP);
+        if ((num_args == 2) && (is_safe_procedure(f)))
+          {
+            set_any_c_np(sc, f, code, sc->curlet, 2, OP_SAFE_C_PP);
+            opt_sp_1(sc, c_function_call(f), code);
+          }
+        else
+          if ((num_args == 3) &&
+              ((is_safe_procedure(f)) ||
+               ((is_semisafe(f)) &&
+                (((car(code) != sc->assoc_symbol) && (car(code) != sc->member_symbol)) ||
+                 (unsafe_is_safe(sc, cadddr(code), sc->curlet))))))
+            set_any_c_np(sc, f, code, sc->curlet, 3, OP_SAFE_C_3P);
+          else set_any_c_np(sc, f, code, sc->curlet, num_args, OP_ANY_C_NP);
       return(true);
 
     case T_CLOSURE:
       if ((!has_methods(f)) &&
-	  (closure_arity_to_int(sc, f) == num_args))
-	{
-	  int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
-	  switch (num_args)
-	    {
-	    case 1:
-	      if (is_safe_closure(f))
-		{
-		  s7_pointer body = closure_body(f);
-		  if ((is_null(cdr(body))) && (is_fxable(sc, car(body))))
-		    {
-		      set_optimize_op(code, hop + OP_SAFE_CLOSURE_P_A);
-		      fx_annotate_arg(sc, body, sc->curlet);
-		    }
-		  else set_optimize_op(code, hop + OP_SAFE_CLOSURE_P);
-		}
-	      else set_optimize_op(code, hop + OP_CLOSURE_P);
-	      set_opt1_lambda_add(code, f); /* added 8-Jun-22 */
-	      set_opt3_arglen(cdr(code), 1);
-	      set_unsafely_optimized(code);
-	      break;
-
-	    case 2:
-	      if (is_fxable(sc, cadr(code)))
-		{
-		  fx_annotate_arg(sc, cdr(code), sc->curlet);
-		  set_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_AP : OP_CLOSURE_AP));
-		}
-	      else
-		if (is_fxable(sc, caddr(code)))
-		  {
-		    fx_annotate_arg(sc, cddr(code), sc->curlet);
-		    set_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_PA : OP_CLOSURE_PA));
-		  }
-		else set_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_PP : OP_CLOSURE_PP));
-	      set_opt1_lambda_add(code, f);  /* added 8-Jun-22 */
-	      set_opt3_arglen(cdr(code), 2); /* for later op_unknown_np */
-	      set_unsafely_optimized(code);
-	      break;
-
-	    case 3:  set_any_closure_np(sc, f, code, sc->curlet, 3, hop + OP_ANY_CLOSURE_3P);        break;
-	    case 4:  set_any_closure_np(sc, f, code, sc->curlet, 4, hop + OP_ANY_CLOSURE_4P);        break;
-	    default: set_any_closure_np(sc, f, code, sc->curlet, num_args, hop + OP_ANY_CLOSURE_NP); break;
-	    }
-	  return(true);
-	}
+          (closure_arity_to_int(sc, f) == num_args))
+        {
+          int32_t hop = (is_immutable_and_stable(sc, car(code))) ? 1 : 0;
+          switch (num_args)
+            {
+            case 1:
+              if (is_safe_closure(f))
+                {
+                  s7_pointer body = closure_body(f);
+                  if ((is_null(cdr(body))) && (is_fxable(sc, car(body))))
+                    {
+                      set_optimize_op(code, hop + OP_SAFE_CLOSURE_P_A);
+                      fx_annotate_arg(sc, body, sc->curlet);
+                    }
+                  else set_optimize_op(code, hop + OP_SAFE_CLOSURE_P);
+                }
+              else set_optimize_op(code, hop + OP_CLOSURE_P);
+              set_opt1_lambda_add(code, f); /* added 8-Jun-22 */
+              set_opt3_arglen(cdr(code), 1);
+              set_unsafely_optimized(code);
+              break;
+
+            case 2:
+              if (is_fxable(sc, cadr(code)))
+                {
+                  fx_annotate_arg(sc, cdr(code), sc->curlet);
+                  set_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_AP : OP_CLOSURE_AP));
+                }
+              else
+                if (is_fxable(sc, caddr(code)))
+                  {
+                    fx_annotate_arg(sc, cddr(code), sc->curlet);
+                    set_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_PA : OP_CLOSURE_PA));
+                  }
+                else set_optimize_op(code, hop + ((is_safe_closure(f)) ? OP_SAFE_CLOSURE_PP : OP_CLOSURE_PP));
+              set_opt1_lambda_add(code, f);  /* added 8-Jun-22 */
+              set_opt3_arglen(cdr(code), 2); /* for later op_unknown_np */
+              set_unsafely_optimized(code);
+              break;
+
+            case 3:  set_any_closure_np(sc, f, code, sc->curlet, 3, hop + OP_ANY_CLOSURE_3P);        break;
+            case 4:  set_any_closure_np(sc, f, code, sc->curlet, 4, hop + OP_ANY_CLOSURE_4P);        break;
+            default: set_any_closure_np(sc, f, code, sc->curlet, num_args, hop + OP_ANY_CLOSURE_NP); break;
+            }
+          return(true);
+        }
       break;
 
     case T_MACRO:      return(fixup_unknown_op(sc, code, f, fixup_macro_d(sc, OP_MACRO_D, f)));
@@ -92013,10 +92013,10 @@ static bool closure_star_is_fine_1(s7_scheme *sc, s7_pointer code, uint16_t type
 static noreturn void eval_apply_error_nr(s7_scheme *sc)
 {
   error_nr(sc, sc->syntax_error_symbol, /* apply_error_nr expanded */
-	   set_elist_4(sc, wrap_string(sc, "attempt to apply ~A ~$ in ~$?", 29),
-		       ((is_symbol_and_keyword(sc->code)) ? wrap_string(sc, "a keyword", 9) : type_name_string(sc, sc->code)),
-		       sc->code,
-		       cons(sc, sc->code, sc->args)));
+           set_elist_4(sc, wrap_string(sc, "attempt to apply ~A ~$ in ~$?", 29),
+                       ((is_symbol_and_keyword(sc->code)) ? wrap_string(sc, "a keyword", 9) : type_name_string(sc, sc->code)),
+                       sc->code,
+                       cons(sc, sc->code, sc->args)));
 }
 
 
@@ -92024,7 +92024,7 @@ static noreturn void eval_apply_error_nr(s7_scheme *sc)
 static s7_pointer eval(s7_scheme *sc, opcode_t first_op)
 {
   if (SHOW_EVAL_OPS) safe_print(fprintf(stderr, "  eval[%d]:, %s %s %s\n", 
-					__LINE__, op_names[first_op], display_truncated(sc->code), display_truncated(sc->args)));
+                                        __LINE__, op_names[first_op], display_truncated(sc->code), display_truncated(sc->args)));
   sc->cur_op = first_op;
   goto TOP_NO_POP;
 
@@ -92035,10 +92035,10 @@ static s7_pointer eval(s7_scheme *sc, opcode_t first_op)
 
     BEGIN:
       if (is_pair(cdr(sc->code)))
-	{
-	  set_current_code(sc, sc->code);
-	  push_stack_no_args(sc, sc->begin_op, cdr(sc->code));
-	}
+        {
+          set_current_code(sc, sc->code);
+          push_stack_no_args(sc, sc->begin_op, cdr(sc->code));
+        }
       sc->code = car(sc->code);
 
     EVAL:
@@ -92058,1786 +92058,1786 @@ static s7_pointer eval(s7_scheme *sc, opcode_t first_op)
        *    so the switch statement is unnecessary -- maybe a table eval_functions[cur_op] eventually
        */
       switch (sc->cur_op)
-	{
-	  /* safe c_functions */
-	case OP_SAFE_C_NC: if (!c_function_is_ok(sc, sc->code)) break;   /* break refers to the switch statement */
-	case HOP_SAFE_C_NC: sc->value = fn_call(sc, sc->code); continue; /* continue refers to the outer while loop -- unfortunate C ambiguity */
+        {
+          /* safe c_functions */
+        case OP_SAFE_C_NC: if (!c_function_is_ok(sc, sc->code)) break;   /* break refers to the switch statement */
+        case HOP_SAFE_C_NC: sc->value = fn_call(sc, sc->code); continue; /* continue refers to the outer while loop -- unfortunate C ambiguity */
 
-	case OP_SAFE_C_S: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_s(sc)) goto EVAL; continue;} /* checking symbol_ctr(car(sc->code)) == 1 just slows us down */
-	case HOP_SAFE_C_S: inline_op_safe_c_s(sc); continue;
+        case OP_SAFE_C_S: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_s(sc)) goto EVAL; continue;} /* checking symbol_ctr(car(sc->code)) == 1 just slows us down */
+        case HOP_SAFE_C_S: inline_op_safe_c_s(sc); continue;
 
-	case OP_SAFE_C_SS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SS: inline_op_safe_c_ss(sc); continue;
+        case OP_SAFE_C_SS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SS: inline_op_safe_c_ss(sc); continue;
 
-	case OP_SAFE_C_NS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_NS: sc->value = fx_c_ns(sc, sc->code); continue;
+        case OP_SAFE_C_NS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_NS: sc->value = fx_c_ns(sc, sc->code); continue;
 
-	case OP_SAFE_C_SC: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SC: op_safe_c_sc(sc); continue;
+        case OP_SAFE_C_SC: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SC: op_safe_c_sc(sc); continue;
 
-	case OP_SAFE_C_CS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CS: sc->value = fx_c_cs(sc, sc->code); continue;
+        case OP_SAFE_C_CS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CS: sc->value = fx_c_cs(sc, sc->code); continue;
 
-	case OP_SAFE_C_CQ: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CQ: sc->value = fx_c_cq(sc, sc->code); continue;
+        case OP_SAFE_C_CQ: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CQ: sc->value = fx_c_cq(sc, sc->code); continue;
 
-	case OP_SAFE_C_FF: if (!c_function_is_ok(sc, sc->code))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_SAFE_C_FF: sc->value = fx_c_ff(sc, sc->code); continue;
+        case OP_SAFE_C_FF: if (!c_function_is_ok(sc, sc->code))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_SAFE_C_FF: sc->value = fx_c_ff(sc, sc->code); continue;
 
-	case OP_SAFE_C_P: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_P: op_safe_c_p(sc); goto EVAL;
-	case OP_SAFE_C_P_1: op_safe_c_p_1(sc); continue;
+        case OP_SAFE_C_P: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_P: op_safe_c_p(sc); goto EVAL;
+        case OP_SAFE_C_P_1: op_safe_c_p_1(sc); continue;
 
-	case OP_ANY_C_NP:    if (!c_function_is_ok(sc, sc->code))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_ANY_C_NP:   if (op_any_c_np(sc)) goto EVAL; continue;
-	case OP_ANY_C_NP_1:  if (inline_op_any_c_np_1(sc)) goto EVAL; continue;
-	case OP_ANY_C_NP_2:  op_any_c_np_2(sc); continue;
-	case OP_ANY_C_NP_MV: if (op_any_c_np_mv(sc)) goto EVAL; goto APPLY;
+        case OP_ANY_C_NP:    if (!c_function_is_ok(sc, sc->code))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_ANY_C_NP:   if (op_any_c_np(sc)) goto EVAL; continue;
+        case OP_ANY_C_NP_1:  if (inline_op_any_c_np_1(sc)) goto EVAL; continue;
+        case OP_ANY_C_NP_2:  op_any_c_np_2(sc); continue;
+        case OP_ANY_C_NP_MV: if (op_any_c_np_mv(sc)) goto EVAL; goto APPLY;
 
-	case OP_SAFE_C_SSP:    if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SSP:   op_safe_c_ssp(sc); goto EVAL;
-	case OP_SAFE_C_SSP_1:  op_safe_c_ssp_1(sc); continue;
+        case OP_SAFE_C_SSP:    if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SSP:   op_safe_c_ssp(sc); goto EVAL;
+        case OP_SAFE_C_SSP_1:  op_safe_c_ssp_1(sc); continue;
 
-	case OP_SAFE_C_A: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_C_A: sc->value = fx_c_a(sc, sc->code); continue;
+        case OP_SAFE_C_A: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_C_A: sc->value = fx_c_a(sc, sc->code); continue;
 
-	case OP_SAFE_C_opAq: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_opAq: sc->value = fx_c_opaq(sc, sc->code); continue;
+        case OP_SAFE_C_opAq: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_opAq: sc->value = fx_c_opaq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opAAq: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_opAAq: sc->value = fx_c_opaaq(sc, sc->code); continue;
+        case OP_SAFE_C_opAAq: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_opAAq: sc->value = fx_c_opaaq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opAAAq: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_opAAAq: sc->value = fx_c_opaaaq(sc, sc->code); continue;
+        case OP_SAFE_C_opAAAq: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_opAAAq: sc->value = fx_c_opaaaq(sc, sc->code); continue;
 
-	case OP_SAFE_C_S_opAq: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_S_opAq: sc->value = fx_c_s_opaq(sc, sc->code); continue;
+        case OP_SAFE_C_S_opAq: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_S_opAq: sc->value = fx_c_s_opaq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opAq_S: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_opAq_S: sc->value = fx_c_opaq_s(sc, sc->code); continue;
+        case OP_SAFE_C_opAq_S: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_opAq_S: sc->value = fx_c_opaq_s(sc, sc->code); continue;
 
-	case OP_SAFE_C_S_opAAq: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_S_opAAq: sc->value = fx_c_s_opaaq(sc, sc->code); continue;
+        case OP_SAFE_C_S_opAAq: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_S_opAAq: sc->value = fx_c_s_opaaq(sc, sc->code); continue;
 
-	case OP_SAFE_C_AA: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_C_AA: sc->value = fx_c_aa(sc, sc->code); continue;
+        case OP_SAFE_C_AA: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_C_AA: sc->value = fx_c_aa(sc, sc->code); continue;
 
-	case OP_SAFE_C_SA: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_C_SA: sc->value = fx_c_sa(sc, sc->code); continue;
+        case OP_SAFE_C_SA: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_C_SA: sc->value = fx_c_sa(sc, sc->code); continue;
 
-	case OP_SAFE_C_AS: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_C_AS: sc->value = fx_c_as(sc, sc->code); continue;
+        case OP_SAFE_C_AS: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_C_AS: sc->value = fx_c_as(sc, sc->code); continue;
 
-	case OP_SAFE_C_CA: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_C_CA: sc->value = fx_c_ca(sc, sc->code); continue;
+        case OP_SAFE_C_CA: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_C_CA: sc->value = fx_c_ca(sc, sc->code); continue;
 
-	case OP_SAFE_C_AC: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_C_AC: sc->value = fx_c_ac(sc, sc->code); continue;
+        case OP_SAFE_C_AC: if (!c_function_is_ok(sc, sc->code)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_C_AC: sc->value = fx_c_ac(sc, sc->code); continue;
 
-	case OP_SAFE_C_AAA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_AAA: sc->value = fx_c_aaa(sc, sc->code); continue;
+        case OP_SAFE_C_AAA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_AAA: sc->value = fx_c_aaa(sc, sc->code); continue;
 
-	case OP_SAFE_C_SAA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SAA: sc->value = fx_c_saa(sc, sc->code); continue;
+        case OP_SAFE_C_SAA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SAA: sc->value = fx_c_saa(sc, sc->code); continue;
 
-	case OP_SAFE_C_SSA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SSA: sc->value = fx_c_ssa(sc, sc->code); continue;
+        case OP_SAFE_C_SSA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SSA: sc->value = fx_c_ssa(sc, sc->code); continue;
         case HOP_HASH_TABLE_INCREMENT: sc->value = fx_hash_table_increment(sc, sc->code); continue; /* a placeholder, almost never called */
 
-	case OP_SAFE_C_SAS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SAS: sc->value = fx_c_sas(sc, sc->code); continue;
+        case OP_SAFE_C_SAS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SAS: sc->value = fx_c_sas(sc, sc->code); continue;
 
-	case OP_SAFE_C_ASS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_ASS: sc->value = fx_c_ass(sc, sc->code); continue;
+        case OP_SAFE_C_ASS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_ASS: sc->value = fx_c_ass(sc, sc->code); continue;
 
-	case OP_SAFE_C_AGG: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_AGG: sc->value = fx_c_agg(sc, sc->code); continue;
+        case OP_SAFE_C_AGG: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_AGG: sc->value = fx_c_agg(sc, sc->code); continue;
 
-	case OP_SAFE_C_CAC: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CAC: sc->value = fx_c_cac(sc, sc->code); continue;
+        case OP_SAFE_C_CAC: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CAC: sc->value = fx_c_cac(sc, sc->code); continue;
 
-	case OP_SAFE_C_CSA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CSA: sc->value = fx_c_csa(sc, sc->code); continue;
+        case OP_SAFE_C_CSA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CSA: sc->value = fx_c_csa(sc, sc->code); continue;
 
-	case OP_SAFE_C_SCA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SCA: sc->value = fx_c_sca(sc, sc->code); continue;
+        case OP_SAFE_C_SCA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SCA: sc->value = fx_c_sca(sc, sc->code); continue;
 
-	case OP_SAFE_C_4A: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_4A: sc->value = fx_c_4a(sc, sc->code); continue;
+        case OP_SAFE_C_4A: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_4A: sc->value = fx_c_4a(sc, sc->code); continue;
 
-	case OP_SAFE_C_NA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_NA: sc->value = fx_c_na(sc, sc->code); continue;
+        case OP_SAFE_C_NA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_NA: sc->value = fx_c_na(sc, sc->code); continue;
 
-	case OP_SAFE_C_ALL_CA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_ALL_CA: sc->value = fx_c_all_ca(sc, sc->code); continue;
+        case OP_SAFE_C_ALL_CA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_ALL_CA: sc->value = fx_c_all_ca(sc, sc->code); continue;
 
-	case OP_SAFE_C_SCS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SCS: sc->value = fx_c_scs(sc, sc->code); continue;
+        case OP_SAFE_C_SCS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SCS: sc->value = fx_c_scs(sc, sc->code); continue;
 
-	case OP_SAFE_C_SSC: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SSC: sc->value = fx_c_ssc(sc, sc->code); continue;
+        case OP_SAFE_C_SSC: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SSC: sc->value = fx_c_ssc(sc, sc->code); continue;
 
-	case OP_SAFE_C_SCC: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SCC: sc->value = fx_c_scc(sc, sc->code); continue;
+        case OP_SAFE_C_SCC: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SCC: sc->value = fx_c_scc(sc, sc->code); continue;
 
-	case OP_SAFE_C_CSC: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CSC: sc->value = fx_c_csc(sc, sc->code); continue;
+        case OP_SAFE_C_CSC: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CSC: sc->value = fx_c_csc(sc, sc->code); continue;
 
-	case OP_SAFE_C_CCS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CCS: sc->value = fx_c_ccs(sc, sc->code); continue;
+        case OP_SAFE_C_CCS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CCS: sc->value = fx_c_ccs(sc, sc->code); continue;
 
-	case OP_SAFE_C_CSS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CSS: sc->value = fx_c_css(sc, sc->code); continue;
+        case OP_SAFE_C_CSS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CSS: sc->value = fx_c_css(sc, sc->code); continue;
 
-	case OP_SAFE_C_SSS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SSS: sc->value = fx_c_sss(sc, sc->code); continue;
+        case OP_SAFE_C_SSS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SSS: sc->value = fx_c_sss(sc, sc->code); continue;
 
-	case OP_SAFE_C_opNCq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opNCq: sc->value = fx_c_opncq(sc, sc->code); continue;
+        case OP_SAFE_C_opNCq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opNCq: sc->value = fx_c_opncq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSq: sc->value = fx_c_opsq(sc, sc->code); continue;
+        case OP_SAFE_C_opSq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSq: sc->value = fx_c_opsq(sc, sc->code); continue;
 
-	case OP_SAFE_C_op_opSqq: if (!c_function_is_ok_cadr_cadadr(sc, sc->code)) break;
-	case HOP_SAFE_C_op_opSqq: sc->value = fx_c_op_opsqq(sc, sc->code); continue;     /* lg cb (splits to not) */
+        case OP_SAFE_C_op_opSqq: if (!c_function_is_ok_cadr_cadadr(sc, sc->code)) break;
+        case HOP_SAFE_C_op_opSqq: sc->value = fx_c_op_opsqq(sc, sc->code); continue;     /* lg cb (splits to not) */
 
-	case OP_SAFE_C_op_S_opSqq: if (!c_function_is_ok_cadr_caddadr(sc, sc->code)) break;
-	case HOP_SAFE_C_op_S_opSqq: sc->value = fx_c_op_s_opsqq(sc, sc->code); continue; /* tlet sg (splits to not) */
+        case OP_SAFE_C_op_S_opSqq: if (!c_function_is_ok_cadr_caddadr(sc, sc->code)) break;
+        case HOP_SAFE_C_op_S_opSqq: sc->value = fx_c_op_s_opsqq(sc, sc->code); continue; /* tlet sg (splits to not) */
 
-	case OP_SAFE_C_op_opSq_Sq: if (!c_function_is_ok_cadr_cadadr(sc, sc->code)) break;
-	case HOP_SAFE_C_op_opSq_Sq: sc->value = fx_c_op_opsq_sq(sc, sc->code); continue; /* lg cb (splits to not etc) */
+        case OP_SAFE_C_op_opSq_Sq: if (!c_function_is_ok_cadr_cadadr(sc, sc->code)) break;
+        case HOP_SAFE_C_op_opSq_Sq: sc->value = fx_c_op_opsq_sq(sc, sc->code); continue; /* lg cb (splits to not etc) */
 
-	case OP_SAFE_C_PS:    if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_PS:   op_safe_c_ps(sc); goto EVAL;
-	case OP_SAFE_C_PS_1:  op_safe_c_ps_1(sc); continue;
+        case OP_SAFE_C_PS:    if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_PS:   op_safe_c_ps(sc); goto EVAL;
+        case OP_SAFE_C_PS_1:  op_safe_c_ps_1(sc); continue;
 
-	case OP_SAFE_C_PC:    if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_PC:   op_safe_c_pc(sc); goto EVAL;
-	case OP_SAFE_C_PC_1:  op_safe_c_pc_1(sc); continue;
+        case OP_SAFE_C_PC:    if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_PC:   op_safe_c_pc(sc); goto EVAL;
+        case OP_SAFE_C_PC_1:  op_safe_c_pc_1(sc); continue;
 
-	case OP_SAFE_C_SP:    if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_SP:   op_safe_c_sp(sc); goto EVAL;
-	case OP_SAFE_C_SP_1:  op_safe_c_sp_1(sc); continue;
+        case OP_SAFE_C_SP:    if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_SP:   op_safe_c_sp(sc); goto EVAL;
+        case OP_SAFE_C_SP_1:  op_safe_c_sp_1(sc); continue;
 
-	case OP_SAFE_CONS_SP_1:     sc->value = cons(sc, sc->args, sc->value); continue;
-	case OP_SAFE_ADD_SP_1:      op_safe_add_sp_1(sc); continue;
-	case OP_SAFE_MULTIPLY_SP_1: op_safe_multiply_sp_1(sc); continue;
+        case OP_SAFE_CONS_SP_1:     sc->value = cons(sc, sc->args, sc->value); continue;
+        case OP_SAFE_ADD_SP_1:      op_safe_add_sp_1(sc); continue;
+        case OP_SAFE_MULTIPLY_SP_1: op_safe_multiply_sp_1(sc); continue;
 
-	case OP_SAFE_C_AP: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_AP: if (op_safe_c_ap(sc)) goto EVAL; continue;
+        case OP_SAFE_C_AP: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_AP: if (op_safe_c_ap(sc)) goto EVAL; continue;
 
-	case OP_SAFE_C_PA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_PA: if (op_safe_c_pa(sc)) goto EVAL; continue;
-	case OP_SAFE_C_PA_1: op_safe_c_pa_1(sc); continue;
+        case OP_SAFE_C_PA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_PA: if (op_safe_c_pa(sc)) goto EVAL; continue;
+        case OP_SAFE_C_PA_1: op_safe_c_pa_1(sc); continue;
 
- 	case OP_SAFE_C_CP: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_CP: op_safe_c_cp(sc); goto EVAL;
-	  /* mv case goes through opt_sp_1 to op_safe_c_sp_mv */
+         case OP_SAFE_C_CP: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_CP: op_safe_c_cp(sc); goto EVAL;
+          /* mv case goes through opt_sp_1 to op_safe_c_sp_mv */
 
-	case OP_SAFE_C_PP:      if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_PP:     op_safe_c_pp(sc);      goto EVAL;
-	case OP_SAFE_C_PP_1:    op_safe_c_pp_1(sc);    goto EVAL;
-	case OP_SAFE_C_PP_3_MV: op_safe_c_pp_3_mv(sc); goto EVAL;
-	case OP_SAFE_C_PP_5:    op_safe_c_pp_5(sc);    continue;
+        case OP_SAFE_C_PP:      if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_PP:     op_safe_c_pp(sc);      goto EVAL;
+        case OP_SAFE_C_PP_1:    op_safe_c_pp_1(sc);    goto EVAL;
+        case OP_SAFE_C_PP_3_MV: op_safe_c_pp_3_mv(sc); goto EVAL;
+        case OP_SAFE_C_PP_5:    op_safe_c_pp_5(sc);    continue;
 
-	case OP_SAFE_C_3P:      if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_3P:     op_safe_c_3p(sc);      goto EVAL;
-	case OP_SAFE_C_3P_1:    op_safe_c_3p_1(sc);    goto EVAL;
-	case OP_SAFE_C_3P_2:    op_safe_c_3p_2(sc);    goto EVAL;
-	case OP_SAFE_C_3P_3:    op_safe_c_3p_3(sc);    continue;
-	case OP_SAFE_C_3P_1_MV: op_safe_c_3p_1_mv(sc); goto EVAL;
-	case OP_SAFE_C_3P_2_MV: op_safe_c_3p_2_mv(sc); goto EVAL;
-	case OP_SAFE_C_3P_3_MV: op_safe_c_3p_3_mv(sc); continue;
+        case OP_SAFE_C_3P:      if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_3P:     op_safe_c_3p(sc);      goto EVAL;
+        case OP_SAFE_C_3P_1:    op_safe_c_3p_1(sc);    goto EVAL;
+        case OP_SAFE_C_3P_2:    op_safe_c_3p_2(sc);    goto EVAL;
+        case OP_SAFE_C_3P_3:    op_safe_c_3p_3(sc);    continue;
+        case OP_SAFE_C_3P_1_MV: op_safe_c_3p_1_mv(sc); goto EVAL;
+        case OP_SAFE_C_3P_2_MV: op_safe_c_3p_2_mv(sc); goto EVAL;
+        case OP_SAFE_C_3P_3_MV: op_safe_c_3p_3_mv(sc); continue;
 
-	case OP_SAFE_C_opSSq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSSq: sc->value = fx_c_opssq(sc, sc->code); continue;
+        case OP_SAFE_C_opSSq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSSq: sc->value = fx_c_opssq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSCq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSCq: sc->value = fx_c_opscq(sc, sc->code); continue;
+        case OP_SAFE_C_opSCq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSCq: sc->value = fx_c_opscq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opCSq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opCSq: sc->value = fx_c_opcsq(sc, sc->code); continue;
+        case OP_SAFE_C_opCSq: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opCSq: sc->value = fx_c_opcsq(sc, sc->code); continue;
 
-	case OP_SAFE_C_S_opSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_S_opSq: sc->value = fx_c_s_opsq(sc, sc->code); continue;
+        case OP_SAFE_C_S_opSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_S_opSq: sc->value = fx_c_s_opsq(sc, sc->code); continue;
 
-	case OP_SAFE_C_C_opSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_C_opSq: sc->value = fx_c_c_opsq(sc, sc->code); continue;
+        case OP_SAFE_C_C_opSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_C_opSq: sc->value = fx_c_c_opsq(sc, sc->code); continue;
 
-	case OP_SAFE_C_C_opSSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_C_opSSq: sc->value = fx_c_c_opssq(sc, sc->code); continue;
+        case OP_SAFE_C_C_opSSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_C_opSSq: sc->value = fx_c_c_opssq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opCSq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opCSq_C: sc->value = fx_c_opcsq_c(sc, sc->code); continue;
+        case OP_SAFE_C_opCSq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opCSq_C: sc->value = fx_c_opcsq_c(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSSq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSSq_C: sc->value = fx_c_opssq_c(sc, sc->code); continue;
+        case OP_SAFE_C_opSSq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSSq_C: sc->value = fx_c_opssq_c(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSSq_S: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSSq_S: sc->value = fx_c_opssq_s(sc, sc->code); continue;
+        case OP_SAFE_C_opSSq_S: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSSq_S: sc->value = fx_c_opssq_s(sc, sc->code); continue;
 
-	case OP_SAFE_C_op_opSSqq_S: if (!c_function_is_ok_cadr_cadadr(sc, sc->code)) break;
-	case HOP_SAFE_C_op_opSSqq_S: sc->value = fx_c_op_opssqq_s(sc, sc->code); continue;
+        case OP_SAFE_C_op_opSSqq_S: if (!c_function_is_ok_cadr_cadadr(sc, sc->code)) break;
+        case HOP_SAFE_C_op_opSSqq_S: sc->value = fx_c_op_opssqq_s(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSCq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSCq_C: sc->value = fx_c_opscq_c(sc, sc->code); continue;
+        case OP_SAFE_C_opSCq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSCq_C: sc->value = fx_c_opscq_c(sc, sc->code); continue;
 
-	case OP_SAFE_C_opCSq_S: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opCSq_S: sc->value = fx_c_opcsq_s(sc, sc->code); continue;
+        case OP_SAFE_C_opCSq_S: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opCSq_S: sc->value = fx_c_opcsq_s(sc, sc->code); continue;
 
-	case OP_SAFE_C_S_opSCq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_S_opSCq: sc->value = fx_c_s_opscq(sc, sc->code); continue;
+        case OP_SAFE_C_S_opSCq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_S_opSCq: sc->value = fx_c_s_opscq(sc, sc->code); continue;
 
-	case OP_SAFE_C_C_opSCq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_C_opSCq: sc->value = fx_c_c_opscq(sc, sc->code); continue;
+        case OP_SAFE_C_C_opSCq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_C_opSCq: sc->value = fx_c_c_opscq(sc, sc->code); continue;
 
-	case OP_SAFE_C_S_opSSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_S_opSSq: sc->value = fx_c_s_opssq(sc, sc->code); continue;
+        case OP_SAFE_C_S_opSSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_S_opSSq: sc->value = fx_c_s_opssq(sc, sc->code); continue;
 
-	case OP_SAFE_C_S_opCSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_S_opCSq: sc->value = fx_c_s_opcsq(sc, sc->code); continue;
+        case OP_SAFE_C_S_opCSq: if (!c_function_is_ok_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_S_opCSq: sc->value = fx_c_s_opcsq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSq_S: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSq_S: sc->value = fx_c_opsq_s(sc, sc->code); continue;
+        case OP_SAFE_C_opSq_S: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSq_S: sc->value = fx_c_opsq_s(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSq_CS: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSq_CS: sc->value = fx_c_opsq_cs(sc, sc->code); continue;
+        case OP_SAFE_C_opSq_CS: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSq_CS: sc->value = fx_c_opsq_cs(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSq_C: sc->value = fx_c_opsq_c(sc, sc->code); continue;
+        case OP_SAFE_C_opSq_C: if (!c_function_is_ok_cadr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSq_C: sc->value = fx_c_opsq_c(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSq_opSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSq_opSq: sc->value = fx_c_opsq_opsq(sc, sc->code); continue;
+        case OP_SAFE_C_opSq_opSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSq_opSq: sc->value = fx_c_opsq_opsq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSSq_opSSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSSq_opSSq: sc->value = fx_c_opssq_opssq(sc, sc->code); continue;
+        case OP_SAFE_C_opSSq_opSSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSSq_opSSq: sc->value = fx_c_opssq_opssq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSSq_opSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSSq_opSq: sc->value = fx_c_opssq_opsq(sc, sc->code); continue;
+        case OP_SAFE_C_opSSq_opSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSSq_opSq: sc->value = fx_c_opssq_opsq(sc, sc->code); continue;
 
-	case OP_SAFE_C_opSq_opSSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
-	case HOP_SAFE_C_opSq_opSSq: sc->value = fx_c_opsq_opssq(sc, sc->code); continue;
+        case OP_SAFE_C_opSq_opSSq: if (!c_function_is_ok_cadr_caddr(sc, sc->code)) break;
+        case HOP_SAFE_C_opSq_opSSq: sc->value = fx_c_opsq_opssq(sc, sc->code); continue;
 
 
-	  /* semisafe c_functions */
-	case OP_CL_S: if (!cl_function_is_ok(sc, sc->code)) break;
-	case HOP_CL_S: inline_op_safe_c_s(sc); continue;
+          /* semisafe c_functions */
+        case OP_CL_S: if (!cl_function_is_ok(sc, sc->code)) break;
+        case HOP_CL_S: inline_op_safe_c_s(sc); continue;
 
-	case OP_CL_SS: if (!cl_function_is_ok(sc, sc->code)) break;
-	case HOP_CL_SS: inline_op_safe_c_ss(sc); continue; /* safe_c case has the code we want */
+        case OP_CL_SS: if (!cl_function_is_ok(sc, sc->code)) break;
+        case HOP_CL_SS: inline_op_safe_c_ss(sc); continue; /* safe_c case has the code we want */
 
-	case OP_CL_A: if (!cl_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_A); goto EVAL;}
-	case HOP_CL_A: op_cl_a(sc); continue;
+        case OP_CL_A: if (!cl_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_A); goto EVAL;}
+        case HOP_CL_A: op_cl_a(sc); continue;
 
-	case OP_CL_AA: if (!cl_function_is_ok(sc, sc->code)) break;
-	case HOP_CL_AA: op_cl_aa(sc); continue;
+        case OP_CL_AA: if (!cl_function_is_ok(sc, sc->code)) break;
+        case HOP_CL_AA: op_cl_aa(sc); continue;
 
-	case OP_CL_SAS: if (!cl_function_is_ok(sc, sc->code)) break;
-	case HOP_CL_SAS: op_cl_sas(sc); continue;
+        case OP_CL_SAS: if (!cl_function_is_ok(sc, sc->code)) break;
+        case HOP_CL_SAS: op_cl_sas(sc); continue;
 
-	case OP_CL_NA: if (!cl_function_is_ok(sc, sc->code)) break;
-	case HOP_CL_NA: op_cl_na(sc); continue;
+        case OP_CL_NA: if (!cl_function_is_ok(sc, sc->code)) break;
+        case HOP_CL_NA: op_cl_na(sc); continue;
 
-	case OP_CL_FA:  if (!cl_function_is_ok(sc, sc->code)) break;
-	case HOP_CL_FA: op_cl_fa(sc); continue;                        /* op_c_fs was not faster if fx_s below */
-	case OP_MAP_FOR_EACH_FA:  op_map_for_each_fa(sc); continue;    /* here only if for-each or map + one seq */
-	case OP_MAP_FOR_EACH_FAA: op_map_for_each_faa(sc); continue;   /* here only if for-each or map + twp seqs */
+        case OP_CL_FA:  if (!cl_function_is_ok(sc, sc->code)) break;
+        case HOP_CL_FA: op_cl_fa(sc); continue;                        /* op_c_fs was not faster if fx_s below */
+        case OP_MAP_FOR_EACH_FA:  op_map_for_each_fa(sc); continue;    /* here only if for-each or map + one seq */
+        case OP_MAP_FOR_EACH_FAA: op_map_for_each_faa(sc); continue;   /* here only if for-each or map + twp seqs */
 
 
-	  /* unsafe c_functions */
-	case OP_C: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S); goto EVAL;}
-	case HOP_C: sc->value = fn_proc(sc->code)(sc, sc->nil); continue;
+          /* unsafe c_functions */
+        case OP_C: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S); goto EVAL;}
+        case HOP_C: sc->value = fn_proc(sc->code)(sc, sc->nil); continue;
 
-	case OP_C_S: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_G); goto EVAL;}
-	case HOP_C_S: op_c_s(sc); continue;
+        case OP_C_S: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_G); goto EVAL;}
+        case HOP_C_S: op_c_s(sc); continue;
 
-	case OP_READ_S: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_G); goto EVAL;}
-	case HOP_READ_S: op_read_s(sc); continue;
+        case OP_READ_S: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_G); goto EVAL;}
+        case HOP_READ_S: op_read_s(sc); continue;
 
-	case OP_C_A: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_A); goto EVAL;}
-	case HOP_C_A: op_c_a(sc); continue;
+        case OP_C_A: if (!c_function_is_ok(sc, sc->code)) {set_optimize_op(sc->code, OP_S_A); goto EVAL;}
+        case HOP_C_A: op_c_a(sc); continue;
 
-	case OP_C_P: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_C_P: op_c_p(sc); goto EVAL;
-	case OP_C_P_1: sc->value = fn_proc(sc->code)(sc, list_1(sc, sc->value)); continue;
+        case OP_C_P: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_C_P: op_c_p(sc); goto EVAL;
+        case OP_C_P_1: sc->value = fn_proc(sc->code)(sc, list_1(sc, sc->value)); continue;
 
-	case OP_C_SS: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_C_SS: op_c_ss(sc); continue;
+        case OP_C_SS: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_C_SS: op_c_ss(sc); continue;
 
-	case OP_C_AP: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_C_AP: op_c_ap(sc); goto EVAL;
-	case OP_C_AP_1: sc->value = fn_proc(sc->code)(sc, sc->args = list_2(sc, sc->args, sc->value)); continue;
+        case OP_C_AP: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_C_AP: op_c_ap(sc); goto EVAL;
+        case OP_C_AP_1: sc->value = fn_proc(sc->code)(sc, sc->args = list_2(sc, sc->args, sc->value)); continue;
 
-	case OP_C_AA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_C_AA: op_c_aa(sc); continue;
+        case OP_C_AA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_C_AA: op_c_aa(sc); continue;
 
-	case OP_C_NC: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_C_NC: op_c_nc(sc); continue;
-	case OP_C_NA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_C_NA: op_c_na(sc); continue;
+        case OP_C_NC: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_C_NC: op_c_nc(sc); continue;
+        case OP_C_NA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_C_NA: op_c_na(sc); continue;
 
-	case OP_APPLY_SS: inline_op_apply_ss(sc); goto APPLY;
-	case OP_APPLY_SA:        op_apply_sa(sc); goto APPLY;
-	case OP_APPLY_SL:        op_apply_sl(sc); goto APPLY;
+        case OP_APPLY_SS: inline_op_apply_ss(sc); goto APPLY;
+        case OP_APPLY_SA:        op_apply_sa(sc); goto APPLY;
+        case OP_APPLY_SL:        op_apply_sl(sc); goto APPLY;
 
-	case OP_CALL_WITH_EXIT:   op_call_with_exit(sc);   goto BEGIN;
-	case OP_CALL_CC:          op_call_cc(sc);          goto BEGIN;
-	case OP_CALL_WITH_EXIT_O: op_call_with_exit_o(sc); goto EVAL;
-	case OP_C_CATCH:          op_c_catch(sc);          goto BEGIN;
-	case OP_C_CATCH_ALL:      op_c_catch_all(sc);      goto BEGIN;
-	case OP_C_CATCH_ALL_O:    op_c_catch_all(sc);      goto EVAL;
-	case OP_C_CATCH_ALL_A:    op_c_catch_all_a(sc);    continue;
+        case OP_CALL_WITH_EXIT:   op_call_with_exit(sc);   goto BEGIN;
+        case OP_CALL_CC:          op_call_cc(sc);          goto BEGIN;
+        case OP_CALL_WITH_EXIT_O: op_call_with_exit_o(sc); goto EVAL;
+        case OP_C_CATCH:          op_c_catch(sc);          goto BEGIN;
+        case OP_C_CATCH_ALL:      op_c_catch_all(sc);      goto BEGIN;
+        case OP_C_CATCH_ALL_O:    op_c_catch_all(sc);      goto EVAL;
+        case OP_C_CATCH_ALL_A:    op_c_catch_all_a(sc);    continue;
 
-	case OP_WITH_IO: if (op_with_io_op(sc)) goto EVAL; goto BEGIN;
-	case OP_WITH_IO_1:
-	  if (!is_string(sc->value)) {op_with_io_1_method(sc); continue;}
-	  sc->code = op_with_io_1(sc);
-	  goto BEGIN;
+        case OP_WITH_IO: if (op_with_io_op(sc)) goto EVAL; goto BEGIN;
+        case OP_WITH_IO_1:
+          if (!is_string(sc->value)) {op_with_io_1_method(sc); continue;}
+          sc->code = op_with_io_1(sc);
+          goto BEGIN;
 
-	case OP_WITH_IO_C: sc->value = cadr(sc->code); sc->code = op_with_io_1(sc); goto BEGIN;
-	case OP_WITH_OUTPUT_TO_STRING:   op_with_output_to_string(sc);   goto BEGIN;
-	case OP_CALL_WITH_OUTPUT_STRING: op_call_with_output_string(sc); goto BEGIN;
+        case OP_WITH_IO_C: sc->value = cadr(sc->code); sc->code = op_with_io_1(sc); goto BEGIN;
+        case OP_WITH_OUTPUT_TO_STRING:   op_with_output_to_string(sc);   goto BEGIN;
+        case OP_CALL_WITH_OUTPUT_STRING: op_call_with_output_string(sc); goto BEGIN;
 
 
-	case OP_F:    op_f(sc);    goto BEGIN;
-	case OP_F_A:  op_f_a(sc);  goto BEGIN;
-	case OP_F_AA: op_f_aa(sc); goto BEGIN;
-	case OP_F_NP: op_f_np(sc); goto EVAL;
-	case OP_F_NP_1: if (op_f_np_1(sc)) goto EVAL; goto BEGIN;
+        case OP_F:    op_f(sc);    goto BEGIN;
+        case OP_F_A:  op_f_a(sc);  goto BEGIN;
+        case OP_F_AA: op_f_aa(sc); goto BEGIN;
+        case OP_F_NP: op_f_np(sc); goto EVAL;
+        case OP_F_NP_1: if (op_f_np_1(sc)) goto EVAL; goto BEGIN;
 
-	case OP_S:    op_s(sc); goto APPLY;
-	case OP_S_G:  if (op_s_g(sc)) continue;                                     goto APPLY;
-	case OP_S_A:  if (op_x_a(sc, lookup_checked(sc, car(sc->code)))) continue;  goto APPLY;
-	case OP_A_A:  if (op_x_a(sc, fx_call(sc, sc->code))) continue;              goto APPLY;
-	case OP_S_AA: if (op_x_aa(sc, lookup_checked(sc, car(sc->code)))) continue; goto APPLY;
-	case OP_A_AA: if (op_x_aa(sc, fx_call(sc, sc->code))) continue;             goto APPLY;
-	case OP_A_SC: if (op_x_sc(sc, fx_call(sc, sc->code))) continue;             goto APPLY;
-	case OP_P_S:  push_stack_no_args_direct(sc, OP_P_S_1); sc->code = car(sc->code); goto EVAL;
-	case OP_P_S_1: op_p_s_1(sc); goto APPLY;
+        case OP_S:    op_s(sc); goto APPLY;
+        case OP_S_G:  if (op_s_g(sc)) continue;                                     goto APPLY;
+        case OP_S_A:  if (op_x_a(sc, lookup_checked(sc, car(sc->code)))) continue;  goto APPLY;
+        case OP_A_A:  if (op_x_a(sc, fx_call(sc, sc->code))) continue;              goto APPLY;
+        case OP_S_AA: if (op_x_aa(sc, lookup_checked(sc, car(sc->code)))) continue; goto APPLY;
+        case OP_A_AA: if (op_x_aa(sc, fx_call(sc, sc->code))) continue;             goto APPLY;
+        case OP_A_SC: if (op_x_sc(sc, fx_call(sc, sc->code))) continue;             goto APPLY;
+        case OP_P_S:  push_stack_no_args_direct(sc, OP_P_S_1); sc->code = car(sc->code); goto EVAL;
+        case OP_P_S_1: op_p_s_1(sc); goto APPLY;
 
-	case OP_SAFE_C_STAR: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_STAR: op_safe_c_star(sc); continue;
+        case OP_SAFE_C_STAR: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_STAR: op_safe_c_star(sc); continue;
 
-	case OP_SAFE_C_STAR_A: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_STAR_A: op_safe_c_star_a(sc); continue;
+        case OP_SAFE_C_STAR_A: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_STAR_A: op_safe_c_star_a(sc); continue;
 
-	case OP_SAFE_C_STAR_AA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_STAR_AA: op_safe_c_star_aa(sc); continue;
+        case OP_SAFE_C_STAR_AA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_STAR_AA: op_safe_c_star_aa(sc); continue;
 
-	case OP_SAFE_C_STAR_NA: if (!c_function_is_ok(sc, sc->code)) break;
-	case HOP_SAFE_C_STAR_NA: op_safe_c_star_na(sc); continue;
+        case OP_SAFE_C_STAR_NA: if (!c_function_is_ok(sc, sc->code)) break;
+        case HOP_SAFE_C_STAR_NA: op_safe_c_star_na(sc); continue;
 
 
-	case OP_THUNK: if (!closure_is_ok(sc, sc->code, FINE_UNSAFE_CLOSURE, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
-	case HOP_THUNK: op_thunk(sc); goto EVAL;
+        case OP_THUNK: if (!closure_is_ok(sc, sc->code, FINE_UNSAFE_CLOSURE, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
+        case HOP_THUNK: op_thunk(sc); goto EVAL;
 
-	case OP_THUNK_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
-	case HOP_THUNK_O: op_thunk_o(sc); goto EVAL;
+        case OP_THUNK_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
+        case HOP_THUNK_O: op_thunk_o(sc); goto EVAL;
 
-	case OP_SAFE_THUNK: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
-	case HOP_SAFE_THUNK: op_safe_thunk(sc); goto EVAL;
+        case OP_SAFE_THUNK: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
+        case HOP_SAFE_THUNK: op_safe_thunk(sc); goto EVAL;
 
-	case OP_THUNK_ANY: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 1)) break; /* symbol as arglist */
-	case HOP_THUNK_ANY: op_thunk_any(sc); goto BEGIN;
+        case OP_THUNK_ANY: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 1)) break; /* symbol as arglist */
+        case HOP_THUNK_ANY: op_thunk_any(sc); goto BEGIN;
 
-	case OP_SAFE_THUNK_ANY: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1)) break; /* symbol as arglist */
-	case HOP_SAFE_THUNK_ANY: op_safe_thunk_any(sc); goto EVAL;
+        case OP_SAFE_THUNK_ANY: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1)) break; /* symbol as arglist */
+        case HOP_SAFE_THUNK_ANY: op_safe_thunk_any(sc); goto EVAL;
 
-	case OP_SAFE_THUNK_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
-	case HOP_SAFE_THUNK_A: sc->value = op_safe_thunk_a(sc, sc->code); continue;
+        case OP_SAFE_THUNK_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
+        case HOP_SAFE_THUNK_A: sc->value = op_safe_thunk_a(sc, sc->code); continue;
 
-	case OP_CLOSURE_S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_S: op_closure_s(sc); goto EVAL;
+        case OP_CLOSURE_S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_S: op_closure_s(sc); goto EVAL;
 
-	case OP_CLOSURE_S_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_S_O: op_closure_s_o(sc); goto EVAL;
+        case OP_CLOSURE_S_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_S_O: op_closure_s_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_S: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_S: op_safe_closure_s(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_S: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_S: op_safe_closure_s(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_S_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_S_O: op_safe_closure_s_o(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_S_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_S_O: op_safe_closure_s_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_S_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_S_A: sc->value = op_safe_closure_s_a(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_S_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 1)) {if (op_unknown_s(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_S_A: sc->value = op_safe_closure_s_a(sc, sc->code); continue;
 
-	case OP_SAFE_CLOSURE_S_TO_S: if ((symbol_ctr(car(sc->code)) > 1) && (!closure_is_eq(sc))) {if (op_unknown_s(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_S_TO_S: sc->value = fx_safe_closure_s_to_s(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_S_TO_S: if ((symbol_ctr(car(sc->code)) > 1) && (!closure_is_eq(sc))) {if (op_unknown_s(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_S_TO_S: sc->value = fx_safe_closure_s_to_s(sc, sc->code); continue;
 
-	case OP_SAFE_CLOSURE_S_TO_SC: if ((symbol_ctr(car(sc->code)) > 1) && (!closure_is_eq(sc))) {if (op_unknown_s(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_S_TO_SC: sc->value = fx_proc(cdr(sc->code))(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_S_TO_SC: if ((symbol_ctr(car(sc->code)) > 1) && (!closure_is_eq(sc))) {if (op_unknown_s(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_S_TO_SC: sc->value = fx_proc(cdr(sc->code))(sc, sc->code); continue;
 
-	case OP_SAFE_CLOSURE_A_TO_SC: if ((symbol_ctr(car(sc->code)) > 1) && (!closure_is_eq(sc))) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_A_TO_SC: sc->value = fx_proc(sc->code)(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_A_TO_SC: if ((symbol_ctr(car(sc->code)) > 1) && (!closure_is_eq(sc))) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_A_TO_SC: sc->value = fx_proc(sc->code)(sc, sc->code); continue;
 
-	case OP_CLOSURE_P: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 1))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_P: op_closure_p(sc); goto EVAL;
-	case OP_CLOSURE_P_1: op_closure_p_1(sc); goto BEGIN;
+        case OP_CLOSURE_P: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 1))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_P: op_closure_p(sc); goto EVAL;
+        case OP_CLOSURE_P_1: op_closure_p_1(sc); goto BEGIN;
 
-	case OP_SAFE_CLOSURE_P:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_P:  op_safe_closure_p(sc);   goto EVAL;
-	case OP_SAFE_CLOSURE_P_1: op_safe_closure_p_1(sc); goto BEGIN;
+        case OP_SAFE_CLOSURE_P:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_P:  op_safe_closure_p(sc);   goto EVAL;
+        case OP_SAFE_CLOSURE_P_1: op_safe_closure_p_1(sc); goto BEGIN;
 
-	case OP_SAFE_CLOSURE_P_A:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_P_A:  op_safe_closure_p_a(sc);   goto EVAL;
-	case OP_SAFE_CLOSURE_P_A_1: op_safe_closure_p_a_1(sc); continue;
+        case OP_SAFE_CLOSURE_P_A:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 1))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_P_A:  op_safe_closure_p_a(sc);   goto EVAL;
+        case OP_SAFE_CLOSURE_P_A_1: op_safe_closure_p_a_1(sc); continue;
 
-	case OP_CLOSURE_A: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_A: inline_op_closure_a(sc); push_stack_no_args(sc, sc->begin_op, T_Pair(cdr(sc->code))); sc->code = car(sc->code); goto EVAL;
+        case OP_CLOSURE_A: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_A: inline_op_closure_a(sc); push_stack_no_args(sc, sc->begin_op, T_Pair(cdr(sc->code))); sc->code = car(sc->code); goto EVAL;
 
-	case OP_CLOSURE_A_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_A_O: inline_op_closure_a(sc); sc->code = car(sc->code); goto EVAL;
+        case OP_CLOSURE_A_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_A_O: inline_op_closure_a(sc); sc->code = car(sc->code); goto EVAL;
 
-	case OP_SAFE_CLOSURE_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_A: op_safe_closure_a(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_A: op_safe_closure_a(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_A_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_A_O: op_safe_closure_a_o(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_A_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_A_O: op_safe_closure_a_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_A_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_A_A: sc->value = op_safe_closure_a_a(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_A_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_A_A: sc->value = op_safe_closure_a_a(sc, sc->code); continue;
 
-	case OP_CLOSURE_AP: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_AP: op_closure_ap(sc); goto EVAL;
-	case OP_CLOSURE_AP_1: op_closure_ap_1(sc); goto BEGIN;
+        case OP_CLOSURE_AP: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_AP: op_closure_ap(sc); goto EVAL;
+        case OP_CLOSURE_AP_1: op_closure_ap_1(sc); goto BEGIN;
 
-	case OP_CLOSURE_PA: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_PA: op_closure_pa(sc); goto EVAL;
-	case OP_CLOSURE_PA_1: op_closure_pa_1(sc); goto BEGIN;
+        case OP_CLOSURE_PA: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_PA: op_closure_pa(sc); goto EVAL;
+        case OP_CLOSURE_PA_1: op_closure_pa_1(sc); goto BEGIN;
 
-	case OP_CLOSURE_PP: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_PP: op_closure_pp(sc); goto EVAL;
-	case OP_CLOSURE_PP_1: op_closure_pp_1(sc); goto EVAL;
+        case OP_CLOSURE_PP: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_PP: op_closure_pp(sc); goto EVAL;
+        case OP_CLOSURE_PP_1: op_closure_pp_1(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_AP: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_AP: op_safe_closure_ap(sc); goto EVAL;
-	case OP_SAFE_CLOSURE_AP_1: op_safe_closure_ap_1(sc); goto BEGIN;
+        case OP_SAFE_CLOSURE_AP: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_AP: op_safe_closure_ap(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_AP_1: op_safe_closure_ap_1(sc); goto BEGIN;
 
-	case OP_SAFE_CLOSURE_PA: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_PA: op_safe_closure_pa(sc); goto EVAL;
-	case OP_SAFE_CLOSURE_PA_1: op_safe_closure_pa_1(sc); goto BEGIN;
+        case OP_SAFE_CLOSURE_PA: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 2)) {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_PA: op_safe_closure_pa(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_PA_1: op_safe_closure_pa_1(sc); goto BEGIN;
 
-	case OP_SAFE_CLOSURE_PP: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 2))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_PP: op_safe_closure_pp(sc); goto EVAL;
-	case OP_SAFE_CLOSURE_PP_1: op_safe_closure_pp_1(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_PP: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 2))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_PP: op_safe_closure_pp(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_PP_1: op_safe_closure_pp_1(sc); goto EVAL;
 
-	case OP_ANY_CLOSURE_3P:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_ANY_CLOSURE_3P:  op_any_closure_3p(sc); goto EVAL;
-	case OP_ANY_CLOSURE_3P_1: if (!op_any_closure_3p_1(sc)) goto EVAL; goto BEGIN;
-	case OP_ANY_CLOSURE_3P_2: if (!op_any_closure_3p_2(sc)) goto EVAL; goto BEGIN;
-	case OP_ANY_CLOSURE_3P_3: op_any_closure_3p_3(sc); goto BEGIN;
+        case OP_ANY_CLOSURE_3P:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_ANY_CLOSURE_3P:  op_any_closure_3p(sc); goto EVAL;
+        case OP_ANY_CLOSURE_3P_1: if (!op_any_closure_3p_1(sc)) goto EVAL; goto BEGIN;
+        case OP_ANY_CLOSURE_3P_2: if (!op_any_closure_3p_2(sc)) goto EVAL; goto BEGIN;
+        case OP_ANY_CLOSURE_3P_3: op_any_closure_3p_3(sc); goto BEGIN;
 
-	case OP_ANY_CLOSURE_4P:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 4))  {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_ANY_CLOSURE_4P:  op_any_closure_4p(sc); goto EVAL;
-	case OP_ANY_CLOSURE_4P_1: if (!op_any_closure_4p_1(sc)) goto EVAL; goto BEGIN;
-	case OP_ANY_CLOSURE_4P_2: if (!op_any_closure_4p_2(sc)) goto EVAL; goto BEGIN;
-	case OP_ANY_CLOSURE_4P_3: if (!op_any_closure_4p_3(sc)) goto EVAL; goto BEGIN;
-	case OP_ANY_CLOSURE_4P_4: op_any_closure_4p_4(sc); goto BEGIN;
+        case OP_ANY_CLOSURE_4P:   if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 4))  {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_ANY_CLOSURE_4P:  op_any_closure_4p(sc); goto EVAL;
+        case OP_ANY_CLOSURE_4P_1: if (!op_any_closure_4p_1(sc)) goto EVAL; goto BEGIN;
+        case OP_ANY_CLOSURE_4P_2: if (!op_any_closure_4p_2(sc)) goto EVAL; goto BEGIN;
+        case OP_ANY_CLOSURE_4P_3: if (!op_any_closure_4p_3(sc)) goto EVAL; goto BEGIN;
+        case OP_ANY_CLOSURE_4P_4: op_any_closure_4p_4(sc); goto BEGIN;
 
-	case OP_CLOSURE_FA: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2)) break;
-	case HOP_CLOSURE_FA: op_closure_fa(sc); goto EVAL;
+        case OP_CLOSURE_FA: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 2)) break;
+        case HOP_CLOSURE_FA: op_closure_fa(sc); goto EVAL;
 
-	case OP_CLOSURE_SS: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_SS: op_closure_ss(sc); goto EVAL;
+        case OP_CLOSURE_SS: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_SS: op_closure_ss(sc); goto EVAL;
 
-	case OP_CLOSURE_SS_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_SS_O: op_closure_ss_o(sc); goto EVAL;
+        case OP_CLOSURE_SS_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_SS_O: op_closure_ss_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_SS: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_SS: op_safe_closure_ss(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_SS: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_SS: op_safe_closure_ss(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_SS_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_SS_O: op_safe_closure_ss_o(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_SS_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_SS_O: op_safe_closure_ss_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_SS_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_SS_A: sc->value = op_safe_closure_ss_a(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_SS_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_SS_A: sc->value = op_safe_closure_ss_a(sc, sc->code); continue;
 
-	case OP_CLOSURE_3S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_3S: op_closure_3s(sc); goto EVAL; /* "fine" here means changing func (as arg) does not constantly call op_unknown_ns */
+        case OP_CLOSURE_3S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_3S: op_closure_3s(sc); goto EVAL; /* "fine" here means changing func (as arg) does not constantly call op_unknown_ns */
 
-	case OP_CLOSURE_3S_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_3S_O: op_closure_3s_o(sc); goto EVAL;
+        case OP_CLOSURE_3S_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_3S_O: op_closure_3s_o(sc); goto EVAL;
 
-	case OP_CLOSURE_4S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 4)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_4S: op_closure_4s(sc); goto EVAL;
+        case OP_CLOSURE_4S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 4)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_4S: op_closure_4s(sc); goto EVAL;
 
-	case OP_CLOSURE_4S_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 4)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_4S_O: op_closure_4s_o(sc); goto EVAL;
+        case OP_CLOSURE_4S_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 4)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_4S_O: op_closure_4s_o(sc); goto EVAL;
 
-	case OP_CLOSURE_5S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 5)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_5S: op_closure_5s(sc); goto EVAL;
+        case OP_CLOSURE_5S: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 5)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_5S: op_closure_5s(sc); goto EVAL;
 
-	case OP_CLOSURE_SC: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_SC: op_closure_sc(sc); goto EVAL;
+        case OP_CLOSURE_SC: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_SC: op_closure_sc(sc); goto EVAL;
 
-	case OP_CLOSURE_SC_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_SC_O: op_closure_sc_o(sc); goto EVAL;
+        case OP_CLOSURE_SC_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_SC_O: op_closure_sc_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_SC: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_SC: op_safe_closure_sc(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_SC: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_SC: op_safe_closure_sc(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_SC_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_SC_O: op_safe_closure_sc_o(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_SC_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 2)) {if (op_unknown_gg(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_SC_O: op_safe_closure_sc_o(sc); goto EVAL;
 
-	case OP_CLOSURE_AA: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_AA: op_closure_aa(sc); goto EVAL;
+        case OP_CLOSURE_AA: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_M, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_AA: op_closure_aa(sc); goto EVAL;
 
-	case OP_CLOSURE_AA_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_AA_O: inline_op_closure_aa_o(sc); goto EVAL;
+        case OP_CLOSURE_AA_O: if (!closure_is_ok(sc, sc->code, OK_UNSAFE_CLOSURE_P, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_AA_O: inline_op_closure_aa_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_AA: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_AA: op_safe_closure_aa(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_AA: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_M, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_AA: op_safe_closure_aa(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_AA_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_AA_O: op_safe_closure_aa_o(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_AA_O: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_P, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_AA_O: op_safe_closure_aa_o(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_AA_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_AA_A: sc->value = fx_safe_closure_aa_a(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_AA_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_AA_A: sc->value = fx_safe_closure_aa_a(sc, sc->code); continue;
 
-	case OP_SAFE_CLOSURE_SSA: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_SSA: op_safe_closure_ssa(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_SSA: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_SSA: op_safe_closure_ssa(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_SAA: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_SAA: op_safe_closure_saa(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_SAA: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_SAA: op_safe_closure_saa(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_AGG: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_AGG: op_safe_closure_agg(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_AGG: if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_AGG: op_safe_closure_agg(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_3A: if (!closure_is_ok(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_3A: op_safe_closure_3a(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_3A: if (!closure_is_ok(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_3A: op_safe_closure_3a(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_NS:  if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_NS: op_safe_closure_ns(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_NS:  if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_NS: op_safe_closure_ns(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_NA:  if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_NA: op_safe_closure_na(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_NA:  if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_NA: op_safe_closure_na(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_3S:  if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_3S: op_safe_closure_3s(sc); goto EVAL;
+        case OP_SAFE_CLOSURE_3S:  if (!closure_is_fine(sc, sc->code, FINE_SAFE_CLOSURE, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_3S: op_safe_closure_3s(sc); goto EVAL;
 
-	case OP_SAFE_CLOSURE_3S_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_3S_A: sc->value = op_safe_closure_3s_a(sc, sc->code); continue;
+        case OP_SAFE_CLOSURE_3S_A: if (!closure_is_ok(sc, sc->code, OK_SAFE_CLOSURE_A, 3)) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_3S_A: sc->value = op_safe_closure_3s_a(sc, sc->code); continue;
 
-	case OP_CLOSURE_NS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_ns(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_NS: op_closure_ns(sc); goto EVAL;
+        case OP_CLOSURE_NS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_ns(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_NS: op_closure_ns(sc); goto EVAL;
 
-	case OP_CLOSURE_ASS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_ASS: op_closure_ass(sc); goto EVAL;
+        case OP_CLOSURE_ASS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_ASS: op_closure_ass(sc); goto EVAL;
 
-	case OP_CLOSURE_AAS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_AAS: op_closure_aas(sc); goto EVAL;
+        case OP_CLOSURE_AAS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_AAS: op_closure_aas(sc); goto EVAL;
 
-	case OP_CLOSURE_SAA:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_SAA: op_closure_saa(sc); goto EVAL;
-
-	case OP_CLOSURE_ASA:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_ASA: op_closure_asa(sc); goto EVAL;
-
-	case OP_CLOSURE_SAS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_SAS: op_closure_sas(sc); goto EVAL;
-
-	case OP_CLOSURE_3A:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_3A: op_closure_3a(sc); goto EVAL;
-
- 	case OP_CLOSURE_4A:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 4)) {if (op_unknown_na(sc)) goto EVAL; continue;}
- 	case HOP_CLOSURE_4A: op_closure_4a(sc); goto EVAL;
-
-	case OP_CLOSURE_NA: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_NA: op_closure_na(sc); goto EVAL;
-
-	case OP_ANY_CLOSURE_NP: if (!closure_np_is_ok(sc, sc->code)) {if (op_unknown_np(sc)) goto EVAL; continue;}
-	case HOP_ANY_CLOSURE_NP: op_any_closure_np(sc); goto EVAL;
-	case OP_ANY_CLOSURE_NP_1:
-	  if (!(inline_collect_np_args(sc, OP_ANY_CLOSURE_NP_1, cons(sc, sc->value, sc->args))))
-	    op_any_closure_np_end(sc);
-	  goto EVAL;
-	case OP_ANY_CLOSURE_NP_2:
-	  sc->args = cons(sc, sc->value, sc->args);
-	  op_any_closure_np_end(sc);
-	  goto EVAL;
-
-	case OP_ANY_CLOSURE_SYM: if (!check_closure_sym(sc, 1)) break; /* (lambda args ...) */
-	case HOP_ANY_CLOSURE_SYM: op_any_closure_sym(sc); goto BEGIN;
-	case OP_ANY_CLOSURE_A_SYM: if (!check_closure_sym(sc, 2)) break; /* (lambda (a . args) ...) */
-	case HOP_ANY_CLOSURE_A_SYM: op_any_closure_a_sym(sc); goto BEGIN;
-
-
-	case OP_TC_AND_A_OR_A_LA:         tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_la(sc, sc->code);                       continue;
-	case OP_TC_OR_A_AND_A_LA:         tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_la(sc, sc->code);                       continue;
-	case OP_TC_AND_A_OR_A_LAA:        tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_laa(sc, sc->code);                      continue;
-	case OP_TC_OR_A_AND_A_LAA:        tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_laa(sc, sc->code);                      continue;
-	case OP_TC_AND_A_OR_A_L3A:        tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_l3a(sc, sc->code);                      continue;
-	case OP_TC_OR_A_AND_A_L3A:        tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_l3a(sc, sc->code);                      continue;
-	case OP_TC_AND_A_OR_A_A_LA:       tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_a_la(sc, sc->code);                     continue;
-	case OP_TC_OR_A_AND_A_A_LA:       tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_a_la(sc, sc->code);                     continue;
-	case OP_TC_OR_A_A_AND_A_A_LA:     tick_tc(sc, sc->cur_op); op_tc_or_a_a_and_a_a_la(sc, sc->code);                   continue;
-	case OP_TC_OR_A_AND_A_A_L3A:      tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_a_l3a(sc, sc->code);                    continue;
-
-	case OP_TC_IF_A_Z_LA:             tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_la(sc, sc->code, false))                continue; goto EVAL;
-	case OP_TC_IF_A_LA_Z:             tick_tc(sc, sc->cur_op); if (op_tc_if_a_la_z(sc, sc->code, false))                continue; goto EVAL;
-	case OP_TC_COND_A_Z_LA:           tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_la(sc, sc->code, true))                 continue; goto EVAL;
-	case OP_TC_COND_A_LA_Z:           tick_tc(sc, sc->cur_op); if (op_tc_if_a_la_z(sc, sc->code, true))                 continue; goto EVAL;
-
-	case OP_TC_IF_A_LAA_Z:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, false, TC_IF))        continue; goto EVAL;
-	case OP_TC_IF_A_Z_LAA:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, true, TC_IF))         continue; goto EVAL;
-	case OP_TC_COND_A_Z_LAA:          tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, true, TC_COND))       continue; goto EVAL;
-	case OP_TC_COND_A_LAA_Z:          tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, false, TC_COND))      continue; goto EVAL;
-	case OP_TC_WHEN_LA:               tick_tc(sc, sc->cur_op); op_tc_when_la(sc, sc->code);                             continue;
-	case OP_TC_WHEN_LAA:              tick_tc(sc, sc->cur_op); op_tc_when_laa(sc, sc->code);                            continue;
-	case OP_TC_WHEN_L3A:              tick_tc(sc, sc->cur_op); op_tc_when_l3a(sc, sc->code);                            continue;
-
-	case OP_TC_IF_A_Z_L3A:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_l3a(sc, sc->code, true))                continue; goto EVAL;
-	case OP_TC_IF_A_L3A_Z:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_l3a(sc, sc->code, false))               continue; goto EVAL;
-
-	case OP_TC_IF_A_Z_IF_A_Z_LA:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, true, TC_IF))   continue; goto EVAL;
-	case OP_TC_IF_A_Z_IF_A_LA_Z:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, false, TC_IF))  continue; goto EVAL;
-	case OP_TC_COND_A_Z_A_Z_LA:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, true, TC_COND)) continue; goto EVAL;
-	case OP_TC_COND_A_Z_A_LA_Z:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, false, TC_COND))continue; goto EVAL;
- 	case OP_TC_AND_A_IF_A_LA_Z:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, false, TC_AND)) continue; goto EVAL;
- 	case OP_TC_AND_A_IF_A_Z_LA:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, true, TC_AND))  continue; goto EVAL;
-
-	case OP_TC_IF_A_Z_IF_A_Z_LAA:     tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_laa(sc, false, sc->code))        continue; goto EVAL;
-	case OP_TC_IF_A_Z_IF_A_LAA_Z:     tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_laa_z(sc, false, sc->code))        continue; goto EVAL;
-	case OP_TC_COND_A_Z_A_Z_LAA:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_laa(sc, true, sc->code))         continue; goto EVAL;
-	case OP_TC_COND_A_Z_A_LAA_Z:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_laa_z(sc, true, sc->code))         continue; goto EVAL;
-
-	case OP_TC_LET_IF_A_Z_LA:         tick_tc(sc, sc->cur_op); if (op_tc_let_if_a_z_la(sc, sc->code))                   continue; goto EVAL;
-	case OP_TC_LET_IF_A_Z_LAA:        tick_tc(sc, sc->cur_op); if (op_tc_let_if_a_z_laa(sc, sc->code))                  continue; goto EVAL;
-	case OP_TC_LET_WHEN_LAA:          tick_tc(sc, sc->cur_op); op_tc_let_when_laa(sc, true, sc->code);                  continue;
-	case OP_TC_LET_UNLESS_LAA:        tick_tc(sc, sc->cur_op); op_tc_let_when_laa(sc, false, sc->code);                 continue;
-
-	case OP_TC_COND_A_Z_A_LAA_LAA:    tick_tc(sc, sc->cur_op); if (op_tc_cond_a_z_a_laa_laa(sc, sc->code))              continue; goto EVAL;
-	case OP_TC_IF_A_Z_IF_A_L3A_L3A:   tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_l3a_l3a(sc, sc->code))             continue; goto EVAL;
-	case OP_TC_IF_A_Z_LET_IF_A_Z_LAA: tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_let_if_a_z_laa(sc, sc->code))           continue; goto EVAL;
-	case OP_TC_CASE_LA:               tick_tc(sc, sc->cur_op); if (op_tc_case_la(sc, sc->code))                         continue; goto BEGIN;
-	case OP_TC_LET_COND:              tick_tc(sc, sc->cur_op); if (op_tc_let_cond(sc, sc->code))                        continue; goto EVAL;
-
-	case OP_RECUR_IF_A_A_opA_LAq:           wrap_recur_if_a_a_opa_laq(sc, true, true);         continue;
- 	case OP_RECUR_IF_A_A_opLA_Aq:           wrap_recur_if_a_a_opa_laq(sc, true, false);        continue;
-	case OP_RECUR_IF_A_opA_LAq_A:           wrap_recur_if_a_a_opa_laq(sc, false, true);        continue;
-	case OP_RECUR_IF_A_opLA_Aq_A:           wrap_recur_if_a_a_opa_laq(sc, false, false);       continue;
-	case OP_RECUR_IF_A_A_opA_LAAq:          wrap_recur(sc, op_recur_if_a_a_opa_laaq);          continue;
-	case OP_RECUR_IF_A_A_opA_L3Aq:          wrap_recur(sc, op_recur_if_a_a_opa_l3aq);          continue;
-	case OP_RECUR_IF_A_opA_LAAq_A:          wrap_recur(sc, op_recur_if_a_opa_laaq_a);          continue;
-	case OP_RECUR_IF_A_A_opLA_LAq:          wrap_recur_if_a_a_opla_laq(sc, true);              continue;
-	case OP_RECUR_IF_A_opLA_LAq_A:          wrap_recur_if_a_a_opla_laq(sc, false);             continue;
-	case OP_RECUR_IF_A_A_opA_LA_LAq:        wrap_recur(sc, op_recur_if_a_a_opa_la_laq);        continue;
-	case OP_RECUR_IF_A_opA_LA_LAq_A:        wrap_recur(sc, op_recur_if_a_opa_la_laq_a);        continue;
-	case OP_RECUR_IF_A_A_LopL3A_L3A_L3Aq:   wrap_recur(sc, op_recur_if_a_a_lopl3a_l3a_l3aq);   continue;
-	case OP_RECUR_IF_A_A_AND_A_LAA_LAA:     wrap_recur(sc, op_recur_if_a_a_and_a_laa_laa);     continue;
-	case OP_RECUR_IF_A_A_opLA_LA_LAq:       wrap_recur(sc, op_recur_if_a_a_opla_la_laq);       continue;
-	case OP_RECUR_IF_A_A_IF_A_LAA_opA_LAAq: wrap_recur(sc, op_recur_if_a_a_if_a_laa_opa_laaq); continue;
-	case OP_RECUR_IF_A_A_IF_A_A_opLA_LAq:   wrap_recur(sc, op_recur_if_a_a_if_a_a_opla_laq);   continue;
-	case OP_RECUR_IF_A_A_IF_A_A_opLAA_LAAq: wrap_recur(sc, op_recur_if_a_a_if_a_a_oplaa_laaq); continue;
-	case OP_RECUR_COND_A_A_opA_LAq:         wrap_recur(sc, op_recur_cond_a_a_opa_laq);         continue;
-	case OP_RECUR_COND_A_A_opA_LAAq:        wrap_recur(sc, op_recur_cond_a_a_opa_laaq);        continue;
-	case OP_RECUR_COND_A_A_A_A_opLA_LAq:    wrap_recur(sc, op_recur_cond_a_a_a_a_opla_laq);    continue;
-	case OP_RECUR_COND_A_A_A_A_opA_LAAq:    wrap_recur(sc, op_recur_cond_a_a_a_a_opa_laaq);    continue;
-	case OP_RECUR_COND_A_A_A_A_opLAA_LAAq:  wrap_recur(sc, op_recur_cond_a_a_a_a_oplaa_laaq);  continue;
-	case OP_RECUR_COND_A_A_A_LAA_opA_LAAq:  wrap_recur(sc, op_recur_cond_a_a_a_laa_opa_laaq);  continue;
-	case OP_RECUR_COND_A_A_A_LAA_LopA_LAAq: wrap_recur_cond_a_a_a_laa_lopa_laaq(sc);           continue;
-	case OP_RECUR_AND_A_OR_A_LAA_LAA:       wrap_recur(sc, op_recur_and_a_or_a_laa_laa);       continue;
-
-
-	case OP_SAFE_CLOSURE_STAR_A: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_A: op_safe_closure_star_a(sc, sc->code); goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_A1: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_A1: op_safe_closure_star_a1(sc, sc->code); goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_KA: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_KA: op_safe_closure_star_ka(sc, sc->code); goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_AA: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_AA: op_safe_closure_star_aa(sc, sc->code); goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_AA_O: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_AA_O: op_safe_closure_star_aa(sc, sc->code); sc->code = car(sc->code); goto EVAL;
-
-	case OP_SAFE_CLOSURE_STAR_3A: if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_3A: if (op_safe_closure_star_aaa(sc, sc->code)) goto EVAL; goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_NA:
-	  if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, (is_pair(cdr(sc->code))) ? opt3_arglen(cdr(sc->code)) : 0))
-	    {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_NA: if (op_safe_closure_star_na(sc, sc->code)) goto EVAL; goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_NA_0: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_NA_0: if (op_safe_closure_star_na_0(sc, sc->code)) goto EVAL; goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_NA_1: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_NA_1: if (op_safe_closure_star_na_1(sc, sc->code)) goto EVAL; goto BEGIN;
-
-	case OP_SAFE_CLOSURE_STAR_NA_2: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_SAFE_CLOSURE_STAR_NA_2: if (op_safe_closure_star_na_2(sc, sc->code)) goto EVAL; goto BEGIN;
-
-
-	case OP_CLOSURE_STAR_A: if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_STAR_A: op_closure_star_a(sc, sc->code); goto BEGIN;
-
-	case OP_CLOSURE_STAR_KA: if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, 1)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_STAR_KA: op_closure_star_ka(sc, sc->code); goto BEGIN;
-
-	case OP_CLOSURE_STAR_NA:
-	  if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, (is_pair(cdr(sc->code))) ? opt3_arglen(cdr(sc->code)) : 0))
-	    {if (op_unknown_na(sc)) goto EVAL; continue;}
-	case HOP_CLOSURE_STAR_NA: if (op_closure_star_na(sc, sc->code)) goto EVAL; goto BEGIN;
-
-
-	case OP_UNKNOWN:    sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown(sc))    goto EVAL; continue;
-	case OP_UNKNOWN_NS: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_ns(sc)) goto EVAL; continue;
-	case OP_UNKNOWN_S:  sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_s(sc))  goto EVAL; continue;
-	case OP_UNKNOWN_GG: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_gg(sc)) goto EVAL; continue;
-	case OP_UNKNOWN_A:  sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_a(sc))  goto EVAL; continue;
-	case OP_UNKNOWN_AA: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_aa(sc)) goto EVAL; continue;
-	case OP_UNKNOWN_NA: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_na(sc)) goto EVAL; continue;
-	case OP_UNKNOWN_NP: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_np(sc)) goto EVAL; continue;
-
-
-	case OP_IMPLICIT_VECTOR_REF_A:      if (!inline_op_implicit_vector_ref_a(sc)) {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_VECTOR_REF_AA:     if (!op_implicit_vector_ref_aa(sc))     {if (op_unknown_aa(sc)) goto EVAL;} continue;
-	case OP_IMPLICIT_STRING_REF_A:      if (!op_implicit_string_ref_a(sc))      {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_HASH_TABLE_REF_A:  if (!op_implicit_hash_table_ref_a(sc))  {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_HASH_TABLE_REF_AA: if (!op_implicit_hash_table_ref_aa(sc)) {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_CONTINUATION_A:    if (!op_implicit_continuation_a(sc))    {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_ITERATE:           if (!op_implicit_iterate(sc))           {if (op_unknown(sc))    goto EVAL;} continue;
-	case OP_IMPLICIT_LET_REF_C:         if (!op_implicit_let_ref_c(sc))         {if ((has_fx(cdr(sc->code))) && (op_unknown_a(sc))) goto EVAL;} continue;
-	case OP_IMPLICIT_LET_REF_A:         if (!op_implicit_let_ref_a(sc))         {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_PAIR_REF_A:        if (!op_implicit_pair_ref_a(sc))        {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_PAIR_REF_AA:       if (!op_implicit_pair_ref_aa(sc))       {if (op_unknown_aa(sc)) goto EVAL;} continue;
-	case OP_IMPLICIT_C_OBJECT_REF_A:    if (!op_implicit_c_object_ref_a(sc))    {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_GOTO:              if (!op_implicit_goto(sc))              {if (op_unknown(sc))    goto EVAL;} continue;
-	case OP_IMPLICIT_GOTO_A:            if (!op_implicit_goto_a(sc))            {if (op_unknown_a(sc))  goto EVAL;} continue;
-	case OP_IMPLICIT_VECTOR_SET_3:      if (op_implicit_vector_set_3(sc)) goto EVAL; continue;
-	case OP_IMPLICIT_VECTOR_SET_4:      if (op_implicit_vector_set_4(sc)) goto EVAL; continue;
-	case OP_IMPLICIT_S7_STARLET_REF_S:  sc->value = s7_starlet(sc, opt3_int(sc->code)); continue;
-	case OP_IMPLICIT_S7_STARLET_SET:    sc->value = s7_starlet_set_1(sc, opt3_sym(sc->code), fx_call(sc, cddr(sc->code))); continue;
-
-	case OP_UNOPT:       goto UNOPT;
-	case OP_SYMBOL:      sc->value = lookup_checked(sc, sc->code);     continue;
-	case OP_CONSTANT:    sc->value = sc->code;                         continue;
-	case OP_PAIR_PAIR:   if (op_pair_pair(sc)) goto EVAL;              continue;         /* car is pair ((if x car cadr) ...) */
-	case OP_PAIR_ANY:    sc->value = car(sc->code);                    goto EVAL_ARGS_TOP;
-	case OP_PAIR_SYM:    if (op_pair_sym(sc)) goto EVAL_ARGS_TOP;      continue;
-
-	case OP_EVAL_SET1_NO_MV:
-	  sc->args = list_1(sc, sc->value);
-	  goto APPLY; /* args = (val), code = setter */
-
-	case OP_EVAL_SET2_NO_MV: sc->args = pair_append(sc, sc->args, list_1(sc, sc->value)); goto APPLY; /* <val> is a normal value */
-	  /* perhaps in_place is safe here: args=list_1(sc->value) if eval_set2, mv if eval_set2_mv */
-
-	case OP_EVAL_SET2_MV: /* <inds> = sc->value is a mv */
-	  push_stack(sc, OP_EVAL_SET2_NO_MV, sc->value, sc->code); /* sc->value = inds */
-	  goto EVAL_SET2;
-
-	case OP_EVAL_SET2: /* <ind> = sc->value is a normal value */
-	  push_stack(sc, OP_EVAL_SET2_NO_MV, list_1(sc, sc->value), sc->code); /* sc->value = ind */
-	EVAL_SET2:
-	  sc->code = sc->args; /* value */
-	  sc->cur_op = optimize_op(sc->code);
-	  goto TOP_NO_POP;
-
-	case OP_EVAL_SET3_NO_MV: op_eval_set3_no_mv(sc); goto APPLY; /* <val> is a normal value */
-
-	case OP_EVAL_SET3_MV: /* <inds> = sc->value is a mv */
-	  sc->args = (is_null(sc->args)) ? sc->value : pair_append(sc, sc->args, T_Lst(sc->value));
-	  goto EVAL_SET3;
-
-	case OP_EVAL_SET3: /* <ind> = sc->value is a normal value */
-	  sc->args = (is_null(sc->args)) ? list_1(sc, sc->value) : pair_append(sc, sc->args, list_1(sc, sc->value)); /* not in_place here */
-	EVAL_SET3:
-	  op_eval_set3(sc);
-	  goto TOP_NO_POP;
-
-	case OP_EVAL_ARGS1: sc->args = cons(sc, sc->value, sc->args); goto EVAL_ARGS;
-	case OP_EVAL_ARGS2: op_eval_args2(sc); goto APPLY; /* sc->value is the last arg, [so if is_null(cdr(sc->code) and current is pair, push args2] */
-	case OP_EVAL_ARGS3: op_eval_args3(sc); goto APPLY; /* sc->value is the next-to-last arg, and the last arg is not a list (so values can't mess us up!) */
-	case OP_EVAL_ARGS4: sc->args = cons(sc, sc->value, sc->args); goto EVAL_ARGS_PAIR;
-	case OP_EVAL_ARGS5: op_eval_args5(sc); goto APPLY;
-
-	EVAL_ARGS_TOP:
-	case OP_EVAL_ARGS:
-	  if (dont_eval_args(sc->value))
-	    {
-	      if (eval_args_no_eval_args(sc)) goto APPLY;
-	      goto TOP_NO_POP;
-	    }
-	  sc->code = cdr(sc->code);
-	  /* sc->value is the func (but can be anything if the code is messed up: (#\a 3))
-	   *   we don't have to delay lookup of the func because arg evaluation order is not specified, so
-	   *     (let ((func +)) (func (let () (set! func -) 3) 2))
-	   *   can return 5.
-	   */
-	  push_op_stack(sc, sc->value);
-	  if (sc->op_stack_now >= sc->op_stack_end)
-	    resize_op_stack(sc);
-	  sc->args = sc->nil;
-
-	EVAL_ARGS:	          /* first time, value = op, args = nil, code is args */
-	  if (is_pair(sc->code))  /* evaluate current arg -- must check for pair here, not sc->nil (improper list as args) */
-	    {
-	      if ((sc->safety > NO_SAFETY) &&
-		  (!is_safety_checked(sc->code)))
-		{
-		  if (tree_is_cyclic(sc, sc->code))
-		    syntax_error_nr(sc, "attempt to evaluate a circular list: ~A", 39, sc->code);
-		  set_safety_checked(sc->code);
-		}
-	    EVAL_ARGS_PAIR:
-	      if (is_pair(car(sc->code)))
-		{
-		  eval_args_pair_car(sc);
-		  goto EVAL;
-		}
-	      if (is_pair(cdr(sc->code)))
-		{
-		  s7_pointer car_code = car(sc->code); /* not a pair */
-		  sc->code = cdr(sc->code);
-		  sc->value = (is_symbol(car_code)) ? lookup_checked(sc, car_code) : T_Ext(car_code);
-		  /* sc->value is the current arg's value, sc->code is pointing to the next */
-
-		  /* cdr(sc->code) might not be a pair or nil here! (eq? #f . 1) -> sc->code is 1 */
-		  if (is_null(cdr(sc->code)))
-		    {
-		      if (eval_args_last_arg(sc)) goto EVAL;
-		      /* drop into APPLY */
-		    }
-		  else
-		    {
-		      /* here we know sc->code is a pair, cdr(sc->code) is not null, sc->value is the previous arg's value */
-		      sc->args = cons(sc, sc->value, sc->args);
-		      goto EVAL_ARGS_PAIR;
-		    }}
-	      else eval_last_arg(sc, car(sc->code));
-	      /* drop into APPLY */
-	    }
-	  else                       /* got all args -- go to apply */
-	    {
-	      /* *(--sc->op_stack_now) is the "function" (sc->value perhaps), sc->code is the arglist end, sc->args might be the preceding args reversed? */
-	      if (is_not_null(sc->code))
-		improper_arglist_error_nr(sc);
-	      sc->code = pop_op_stack(sc);
-	      sc->args = proper_list_reverse_in_place(sc, sc->args);
-	    }
-	  /* turning this into a call on an array of functions was not a complete disaster, but tauto.scm was ~1.5% slower.
-	   *   the array-index overhead is the same as the current switch statement's, but there was also the boolean+jump overhead,
-	   *   and the function-local overhead currently otherwise 0 if inlined.
-	   */
-	APPLY:
-	case OP_APPLY:
-	  if (SHOW_EVAL_OPS) safe_print(fprintf(stderr, "  %s[%d]: op_apply %s (%s) to %s\n", __func__, __LINE__,
-						display_truncated(sc->code), s7_type_names[type(sc->code)], display_truncated(sc->args)));
-	  switch (type(sc->code))
-	    {
-	    case T_C_FUNCTION:          sc->value = apply_c_function(sc, sc->code, sc->args); continue;
-	    case T_C_RST_NO_REQ_FUNCTION: apply_c_rst_no_req_function(sc); continue;
-	    case T_C_FUNCTION_STAR:     apply_c_function_star(sc);      continue;
-	    case T_CONTINUATION:        call_with_current_continuation(sc); continue;
-	    case T_GOTO:	        call_with_exit(sc);	        continue;
-	    case T_C_OBJECT:	        apply_c_object(sc);	        continue;
-	    case T_STRING:	        apply_string(sc);	        continue;
-	    case T_HASH_TABLE:	        apply_hash_table(sc);           continue;
-	    case T_ITERATOR:	        apply_iterator(sc);	        continue;
-	    case T_LET:	                apply_let(sc);	                continue;
-	    case T_INT_VECTOR: case T_BYTE_VECTOR: case T_FLOAT_VECTOR:
-	    case T_VECTOR: 	        apply_vector(sc);	        continue;
-	    case T_SYNTAX:	        apply_syntax(sc); 	        goto TOP_NO_POP;
-	    case T_PAIR:	        if (apply_pair(sc)) continue;   goto APPLY;
-	    case T_CLOSURE:             apply_closure(sc);              goto APPLY_LAMBDA;
-	    case T_CLOSURE_STAR:        if (apply_closure_star(sc)) goto EVAL; goto BEGIN;
-	    case T_C_MACRO:  	        apply_c_macro(sc);	        goto EVAL;
-	    case T_MACRO:               apply_macro(sc);                goto APPLY_LAMBDA;
-	    case T_BACRO:               apply_bacro(sc);                goto APPLY_LAMBDA;
-	    case T_MACRO_STAR:          apply_macro_star(sc);           goto BEGIN;
-	    case T_BACRO_STAR:          apply_bacro_star(sc);           goto BEGIN;
-	    default:                    eval_apply_error_nr(sc);
-	    }
-
-	case OP_MACRO_STAR_D: if (op_macro_star_d(sc))     goto EVAL_ARGS_TOP; goto BEGIN;
-	case OP_MACRO_D:      if (op_macro_d(sc, T_MACRO)) goto EVAL_ARGS_TOP; /* fall through presumably */
-
-	APPLY_LAMBDA:
-	case OP_APPLY_LAMBDA:
-	  inline_apply_lambda(sc);
-	  goto BEGIN;
-
-	case OP_LAMBDA_STAR_DEFAULT: if (op_lambda_star_default(sc)) goto EVAL; goto BEGIN;
-
-	case OP_MACROEXPAND_1:
-	  switch (op_macroexpand_1(sc)) {case goto_begin: goto BEGIN; case goto_eval: goto EVAL; case goto_start: continue; default: goto APPLY_LAMBDA;}
-	case OP_MACROEXPAND:
-	  switch (op_macroexpand(sc)) {case goto_begin: goto BEGIN; case goto_eval: goto EVAL; case goto_start: continue; default: goto APPLY_LAMBDA;}
-
-
-	HEAPSORT: if (op_heapsort(sc)) continue; if (sc->value != sc->F) goto APPLY;
-	case OP_SORT1: op_sort1(sc); goto APPLY;
-	case OP_SORT2: if (op_sort2(sc)) continue; goto HEAPSORT;
-	case OP_SORT:  if (!op_sort(sc)) goto HEAPSORT;
-	case OP_SORT3: if (op_sort3(sc)) continue; goto HEAPSORT;
-	case OP_SORT_PAIR_END:   sc->value = vector_into_list(sc, sc->value, car(sc->args)); continue;
-	case OP_SORT_VECTOR_END: sc->value = vector_into_fi_vector(sc->value, car(sc->args)); continue;
-	case OP_SORT_STRING_END: sc->value = vector_into_string(sc->value, car(sc->args)); continue;
+        case OP_CLOSURE_SAA:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_SAA: op_closure_saa(sc); goto EVAL;
+
+        case OP_CLOSURE_ASA:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_ASA: op_closure_asa(sc); goto EVAL;
+
+        case OP_CLOSURE_SAS:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_SAS: op_closure_sas(sc); goto EVAL;
+
+        case OP_CLOSURE_3A:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_3A: op_closure_3a(sc); goto EVAL;
+
+         case OP_CLOSURE_4A:  if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, 4)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+         case HOP_CLOSURE_4A: op_closure_4a(sc); goto EVAL;
+
+        case OP_CLOSURE_NA: if (!closure_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE, opt3_arglen(cdr(sc->code)))) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_NA: op_closure_na(sc); goto EVAL;
+
+        case OP_ANY_CLOSURE_NP: if (!closure_np_is_ok(sc, sc->code)) {if (op_unknown_np(sc)) goto EVAL; continue;}
+        case HOP_ANY_CLOSURE_NP: op_any_closure_np(sc); goto EVAL;
+        case OP_ANY_CLOSURE_NP_1:
+          if (!(inline_collect_np_args(sc, OP_ANY_CLOSURE_NP_1, cons(sc, sc->value, sc->args))))
+            op_any_closure_np_end(sc);
+          goto EVAL;
+        case OP_ANY_CLOSURE_NP_2:
+          sc->args = cons(sc, sc->value, sc->args);
+          op_any_closure_np_end(sc);
+          goto EVAL;
+
+        case OP_ANY_CLOSURE_SYM: if (!check_closure_sym(sc, 1)) break; /* (lambda args ...) */
+        case HOP_ANY_CLOSURE_SYM: op_any_closure_sym(sc); goto BEGIN;
+        case OP_ANY_CLOSURE_A_SYM: if (!check_closure_sym(sc, 2)) break; /* (lambda (a . args) ...) */
+        case HOP_ANY_CLOSURE_A_SYM: op_any_closure_a_sym(sc); goto BEGIN;
+
+
+        case OP_TC_AND_A_OR_A_LA:         tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_la(sc, sc->code);                       continue;
+        case OP_TC_OR_A_AND_A_LA:         tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_la(sc, sc->code);                       continue;
+        case OP_TC_AND_A_OR_A_LAA:        tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_laa(sc, sc->code);                      continue;
+        case OP_TC_OR_A_AND_A_LAA:        tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_laa(sc, sc->code);                      continue;
+        case OP_TC_AND_A_OR_A_L3A:        tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_l3a(sc, sc->code);                      continue;
+        case OP_TC_OR_A_AND_A_L3A:        tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_l3a(sc, sc->code);                      continue;
+        case OP_TC_AND_A_OR_A_A_LA:       tick_tc(sc, sc->cur_op); op_tc_and_a_or_a_a_la(sc, sc->code);                     continue;
+        case OP_TC_OR_A_AND_A_A_LA:       tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_a_la(sc, sc->code);                     continue;
+        case OP_TC_OR_A_A_AND_A_A_LA:     tick_tc(sc, sc->cur_op); op_tc_or_a_a_and_a_a_la(sc, sc->code);                   continue;
+        case OP_TC_OR_A_AND_A_A_L3A:      tick_tc(sc, sc->cur_op); op_tc_or_a_and_a_a_l3a(sc, sc->code);                    continue;
+
+        case OP_TC_IF_A_Z_LA:             tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_la(sc, sc->code, false))                continue; goto EVAL;
+        case OP_TC_IF_A_LA_Z:             tick_tc(sc, sc->cur_op); if (op_tc_if_a_la_z(sc, sc->code, false))                continue; goto EVAL;
+        case OP_TC_COND_A_Z_LA:           tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_la(sc, sc->code, true))                 continue; goto EVAL;
+        case OP_TC_COND_A_LA_Z:           tick_tc(sc, sc->cur_op); if (op_tc_if_a_la_z(sc, sc->code, true))                 continue; goto EVAL;
+
+        case OP_TC_IF_A_LAA_Z:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, false, TC_IF))        continue; goto EVAL;
+        case OP_TC_IF_A_Z_LAA:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, true, TC_IF))         continue; goto EVAL;
+        case OP_TC_COND_A_Z_LAA:          tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, true, TC_COND))       continue; goto EVAL;
+        case OP_TC_COND_A_LAA_Z:          tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_laa(sc, sc->code, false, TC_COND))      continue; goto EVAL;
+        case OP_TC_WHEN_LA:               tick_tc(sc, sc->cur_op); op_tc_when_la(sc, sc->code);                             continue;
+        case OP_TC_WHEN_LAA:              tick_tc(sc, sc->cur_op); op_tc_when_laa(sc, sc->code);                            continue;
+        case OP_TC_WHEN_L3A:              tick_tc(sc, sc->cur_op); op_tc_when_l3a(sc, sc->code);                            continue;
+
+        case OP_TC_IF_A_Z_L3A:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_l3a(sc, sc->code, true))                continue; goto EVAL;
+        case OP_TC_IF_A_L3A_Z:            tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_l3a(sc, sc->code, false))               continue; goto EVAL;
+
+        case OP_TC_IF_A_Z_IF_A_Z_LA:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, true, TC_IF))   continue; goto EVAL;
+        case OP_TC_IF_A_Z_IF_A_LA_Z:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, false, TC_IF))  continue; goto EVAL;
+        case OP_TC_COND_A_Z_A_Z_LA:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, true, TC_COND)) continue; goto EVAL;
+        case OP_TC_COND_A_Z_A_LA_Z:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, false, TC_COND))continue; goto EVAL;
+         case OP_TC_AND_A_IF_A_LA_Z:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, false, TC_AND)) continue; goto EVAL;
+         case OP_TC_AND_A_IF_A_Z_LA:       tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_la(sc, sc->code, true, TC_AND))  continue; goto EVAL;
+
+        case OP_TC_IF_A_Z_IF_A_Z_LAA:     tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_laa(sc, false, sc->code))        continue; goto EVAL;
+        case OP_TC_IF_A_Z_IF_A_LAA_Z:     tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_laa_z(sc, false, sc->code))        continue; goto EVAL;
+        case OP_TC_COND_A_Z_A_Z_LAA:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_z_laa(sc, true, sc->code))         continue; goto EVAL;
+        case OP_TC_COND_A_Z_A_LAA_Z:      tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_laa_z(sc, true, sc->code))         continue; goto EVAL;
+
+        case OP_TC_LET_IF_A_Z_LA:         tick_tc(sc, sc->cur_op); if (op_tc_let_if_a_z_la(sc, sc->code))                   continue; goto EVAL;
+        case OP_TC_LET_IF_A_Z_LAA:        tick_tc(sc, sc->cur_op); if (op_tc_let_if_a_z_laa(sc, sc->code))                  continue; goto EVAL;
+        case OP_TC_LET_WHEN_LAA:          tick_tc(sc, sc->cur_op); op_tc_let_when_laa(sc, true, sc->code);                  continue;
+        case OP_TC_LET_UNLESS_LAA:        tick_tc(sc, sc->cur_op); op_tc_let_when_laa(sc, false, sc->code);                 continue;
+
+        case OP_TC_COND_A_Z_A_LAA_LAA:    tick_tc(sc, sc->cur_op); if (op_tc_cond_a_z_a_laa_laa(sc, sc->code))              continue; goto EVAL;
+        case OP_TC_IF_A_Z_IF_A_L3A_L3A:   tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_if_a_l3a_l3a(sc, sc->code))             continue; goto EVAL;
+        case OP_TC_IF_A_Z_LET_IF_A_Z_LAA: tick_tc(sc, sc->cur_op); if (op_tc_if_a_z_let_if_a_z_laa(sc, sc->code))           continue; goto EVAL;
+        case OP_TC_CASE_LA:               tick_tc(sc, sc->cur_op); if (op_tc_case_la(sc, sc->code))                         continue; goto BEGIN;
+        case OP_TC_LET_COND:              tick_tc(sc, sc->cur_op); if (op_tc_let_cond(sc, sc->code))                        continue; goto EVAL;
+
+        case OP_RECUR_IF_A_A_opA_LAq:           wrap_recur_if_a_a_opa_laq(sc, true, true);         continue;
+         case OP_RECUR_IF_A_A_opLA_Aq:           wrap_recur_if_a_a_opa_laq(sc, true, false);        continue;
+        case OP_RECUR_IF_A_opA_LAq_A:           wrap_recur_if_a_a_opa_laq(sc, false, true);        continue;
+        case OP_RECUR_IF_A_opLA_Aq_A:           wrap_recur_if_a_a_opa_laq(sc, false, false);       continue;
+        case OP_RECUR_IF_A_A_opA_LAAq:          wrap_recur(sc, op_recur_if_a_a_opa_laaq);          continue;
+        case OP_RECUR_IF_A_A_opA_L3Aq:          wrap_recur(sc, op_recur_if_a_a_opa_l3aq);          continue;
+        case OP_RECUR_IF_A_opA_LAAq_A:          wrap_recur(sc, op_recur_if_a_opa_laaq_a);          continue;
+        case OP_RECUR_IF_A_A_opLA_LAq:          wrap_recur_if_a_a_opla_laq(sc, true);              continue;
+        case OP_RECUR_IF_A_opLA_LAq_A:          wrap_recur_if_a_a_opla_laq(sc, false);             continue;
+        case OP_RECUR_IF_A_A_opA_LA_LAq:        wrap_recur(sc, op_recur_if_a_a_opa_la_laq);        continue;
+        case OP_RECUR_IF_A_opA_LA_LAq_A:        wrap_recur(sc, op_recur_if_a_opa_la_laq_a);        continue;
+        case OP_RECUR_IF_A_A_LopL3A_L3A_L3Aq:   wrap_recur(sc, op_recur_if_a_a_lopl3a_l3a_l3aq);   continue;
+        case OP_RECUR_IF_A_A_AND_A_LAA_LAA:     wrap_recur(sc, op_recur_if_a_a_and_a_laa_laa);     continue;
+        case OP_RECUR_IF_A_A_opLA_LA_LAq:       wrap_recur(sc, op_recur_if_a_a_opla_la_laq);       continue;
+        case OP_RECUR_IF_A_A_IF_A_LAA_opA_LAAq: wrap_recur(sc, op_recur_if_a_a_if_a_laa_opa_laaq); continue;
+        case OP_RECUR_IF_A_A_IF_A_A_opLA_LAq:   wrap_recur(sc, op_recur_if_a_a_if_a_a_opla_laq);   continue;
+        case OP_RECUR_IF_A_A_IF_A_A_opLAA_LAAq: wrap_recur(sc, op_recur_if_a_a_if_a_a_oplaa_laaq); continue;
+        case OP_RECUR_COND_A_A_opA_LAq:         wrap_recur(sc, op_recur_cond_a_a_opa_laq);         continue;
+        case OP_RECUR_COND_A_A_opA_LAAq:        wrap_recur(sc, op_recur_cond_a_a_opa_laaq);        continue;
+        case OP_RECUR_COND_A_A_A_A_opLA_LAq:    wrap_recur(sc, op_recur_cond_a_a_a_a_opla_laq);    continue;
+        case OP_RECUR_COND_A_A_A_A_opA_LAAq:    wrap_recur(sc, op_recur_cond_a_a_a_a_opa_laaq);    continue;
+        case OP_RECUR_COND_A_A_A_A_opLAA_LAAq:  wrap_recur(sc, op_recur_cond_a_a_a_a_oplaa_laaq);  continue;
+        case OP_RECUR_COND_A_A_A_LAA_opA_LAAq:  wrap_recur(sc, op_recur_cond_a_a_a_laa_opa_laaq);  continue;
+        case OP_RECUR_COND_A_A_A_LAA_LopA_LAAq: wrap_recur_cond_a_a_a_laa_lopa_laaq(sc);           continue;
+        case OP_RECUR_AND_A_OR_A_LAA_LAA:       wrap_recur(sc, op_recur_and_a_or_a_laa_laa);       continue;
+
+
+        case OP_SAFE_CLOSURE_STAR_A: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_A: op_safe_closure_star_a(sc, sc->code); goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_A1: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_A1: op_safe_closure_star_a1(sc, sc->code); goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_KA: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_KA: op_safe_closure_star_ka(sc, sc->code); goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_AA: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_AA: op_safe_closure_star_aa(sc, sc->code); goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_AA_O: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_AA_O: op_safe_closure_star_aa(sc, sc->code); sc->code = car(sc->code); goto EVAL;
+
+        case OP_SAFE_CLOSURE_STAR_3A: if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, 3)) {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_3A: if (op_safe_closure_star_aaa(sc, sc->code)) goto EVAL; goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_NA:
+          if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, (is_pair(cdr(sc->code))) ? opt3_arglen(cdr(sc->code)) : 0))
+            {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_NA: if (op_safe_closure_star_na(sc, sc->code)) goto EVAL; goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_NA_0: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 0)) {if (op_unknown(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_NA_0: if (op_safe_closure_star_na_0(sc, sc->code)) goto EVAL; goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_NA_1: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_NA_1: if (op_safe_closure_star_na_1(sc, sc->code)) goto EVAL; goto BEGIN;
+
+        case OP_SAFE_CLOSURE_STAR_NA_2: if (!closure_star_is_fine(sc, sc->code, FINE_SAFE_CLOSURE_STAR, 2)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_SAFE_CLOSURE_STAR_NA_2: if (op_safe_closure_star_na_2(sc, sc->code)) goto EVAL; goto BEGIN;
+
+
+        case OP_CLOSURE_STAR_A: if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, 1)) {if (op_unknown_a(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_STAR_A: op_closure_star_a(sc, sc->code); goto BEGIN;
+
+        case OP_CLOSURE_STAR_KA: if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, 1)) {if (op_unknown_aa(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_STAR_KA: op_closure_star_ka(sc, sc->code); goto BEGIN;
+
+        case OP_CLOSURE_STAR_NA:
+          if (!closure_star_is_fine(sc, sc->code, FINE_UNSAFE_CLOSURE_STAR, (is_pair(cdr(sc->code))) ? opt3_arglen(cdr(sc->code)) : 0))
+            {if (op_unknown_na(sc)) goto EVAL; continue;}
+        case HOP_CLOSURE_STAR_NA: if (op_closure_star_na(sc, sc->code)) goto EVAL; goto BEGIN;
+
+
+        case OP_UNKNOWN:    sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown(sc))    goto EVAL; continue;
+        case OP_UNKNOWN_NS: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_ns(sc)) goto EVAL; continue;
+        case OP_UNKNOWN_S:  sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_s(sc))  goto EVAL; continue;
+        case OP_UNKNOWN_GG: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_gg(sc)) goto EVAL; continue;
+        case OP_UNKNOWN_A:  sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_a(sc))  goto EVAL; continue;
+        case OP_UNKNOWN_AA: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_aa(sc)) goto EVAL; continue;
+        case OP_UNKNOWN_NA: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_na(sc)) goto EVAL; continue;
+        case OP_UNKNOWN_NP: sc->last_function = lookup_checked(sc, car(sc->code)); if (op_unknown_np(sc)) goto EVAL; continue;
+
+
+        case OP_IMPLICIT_VECTOR_REF_A:      if (!inline_op_implicit_vector_ref_a(sc)) {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_VECTOR_REF_AA:     if (!op_implicit_vector_ref_aa(sc))     {if (op_unknown_aa(sc)) goto EVAL;} continue;
+        case OP_IMPLICIT_STRING_REF_A:      if (!op_implicit_string_ref_a(sc))      {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_HASH_TABLE_REF_A:  if (!op_implicit_hash_table_ref_a(sc))  {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_HASH_TABLE_REF_AA: if (!op_implicit_hash_table_ref_aa(sc)) {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_CONTINUATION_A:    if (!op_implicit_continuation_a(sc))    {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_ITERATE:           if (!op_implicit_iterate(sc))           {if (op_unknown(sc))    goto EVAL;} continue;
+        case OP_IMPLICIT_LET_REF_C:         if (!op_implicit_let_ref_c(sc))         {if ((has_fx(cdr(sc->code))) && (op_unknown_a(sc))) goto EVAL;} continue;
+        case OP_IMPLICIT_LET_REF_A:         if (!op_implicit_let_ref_a(sc))         {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_PAIR_REF_A:        if (!op_implicit_pair_ref_a(sc))        {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_PAIR_REF_AA:       if (!op_implicit_pair_ref_aa(sc))       {if (op_unknown_aa(sc)) goto EVAL;} continue;
+        case OP_IMPLICIT_C_OBJECT_REF_A:    if (!op_implicit_c_object_ref_a(sc))    {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_GOTO:              if (!op_implicit_goto(sc))              {if (op_unknown(sc))    goto EVAL;} continue;
+        case OP_IMPLICIT_GOTO_A:            if (!op_implicit_goto_a(sc))            {if (op_unknown_a(sc))  goto EVAL;} continue;
+        case OP_IMPLICIT_VECTOR_SET_3:      if (op_implicit_vector_set_3(sc)) goto EVAL; continue;
+        case OP_IMPLICIT_VECTOR_SET_4:      if (op_implicit_vector_set_4(sc)) goto EVAL; continue;
+        case OP_IMPLICIT_S7_STARLET_REF_S:  sc->value = s7_starlet(sc, opt3_int(sc->code)); continue;
+        case OP_IMPLICIT_S7_STARLET_SET:    sc->value = s7_starlet_set_1(sc, opt3_sym(sc->code), fx_call(sc, cddr(sc->code))); continue;
+
+        case OP_UNOPT:       goto UNOPT;
+        case OP_SYMBOL:      sc->value = lookup_checked(sc, sc->code);     continue;
+        case OP_CONSTANT:    sc->value = sc->code;                         continue;
+        case OP_PAIR_PAIR:   if (op_pair_pair(sc)) goto EVAL;              continue;         /* car is pair ((if x car cadr) ...) */
+        case OP_PAIR_ANY:    sc->value = car(sc->code);                    goto EVAL_ARGS_TOP;
+        case OP_PAIR_SYM:    if (op_pair_sym(sc)) goto EVAL_ARGS_TOP;      continue;
+
+        case OP_EVAL_SET1_NO_MV:
+          sc->args = list_1(sc, sc->value);
+          goto APPLY; /* args = (val), code = setter */
+
+        case OP_EVAL_SET2_NO_MV: sc->args = pair_append(sc, sc->args, list_1(sc, sc->value)); goto APPLY; /* <val> is a normal value */
+          /* perhaps in_place is safe here: args=list_1(sc->value) if eval_set2, mv if eval_set2_mv */
+
+        case OP_EVAL_SET2_MV: /* <inds> = sc->value is a mv */
+          push_stack(sc, OP_EVAL_SET2_NO_MV, sc->value, sc->code); /* sc->value = inds */
+          goto EVAL_SET2;
+
+        case OP_EVAL_SET2: /* <ind> = sc->value is a normal value */
+          push_stack(sc, OP_EVAL_SET2_NO_MV, list_1(sc, sc->value), sc->code); /* sc->value = ind */
+        EVAL_SET2:
+          sc->code = sc->args; /* value */
+          sc->cur_op = optimize_op(sc->code);
+          goto TOP_NO_POP;
+
+        case OP_EVAL_SET3_NO_MV: op_eval_set3_no_mv(sc); goto APPLY; /* <val> is a normal value */
+
+        case OP_EVAL_SET3_MV: /* <inds> = sc->value is a mv */
+          sc->args = (is_null(sc->args)) ? sc->value : pair_append(sc, sc->args, T_Lst(sc->value));
+          goto EVAL_SET3;
+
+        case OP_EVAL_SET3: /* <ind> = sc->value is a normal value */
+          sc->args = (is_null(sc->args)) ? list_1(sc, sc->value) : pair_append(sc, sc->args, list_1(sc, sc->value)); /* not in_place here */
+        EVAL_SET3:
+          op_eval_set3(sc);
+          goto TOP_NO_POP;
+
+        case OP_EVAL_ARGS1: sc->args = cons(sc, sc->value, sc->args); goto EVAL_ARGS;
+        case OP_EVAL_ARGS2: op_eval_args2(sc); goto APPLY; /* sc->value is the last arg, [so if is_null(cdr(sc->code) and current is pair, push args2] */
+        case OP_EVAL_ARGS3: op_eval_args3(sc); goto APPLY; /* sc->value is the next-to-last arg, and the last arg is not a list (so values can't mess us up!) */
+        case OP_EVAL_ARGS4: sc->args = cons(sc, sc->value, sc->args); goto EVAL_ARGS_PAIR;
+        case OP_EVAL_ARGS5: op_eval_args5(sc); goto APPLY;
+
+        EVAL_ARGS_TOP:
+        case OP_EVAL_ARGS:
+          if (dont_eval_args(sc->value))
+            {
+              if (eval_args_no_eval_args(sc)) goto APPLY;
+              goto TOP_NO_POP;
+            }
+          sc->code = cdr(sc->code);
+          /* sc->value is the func (but can be anything if the code is messed up: (#\a 3))
+           *   we don't have to delay lookup of the func because arg evaluation order is not specified, so
+           *     (let ((func +)) (func (let () (set! func -) 3) 2))
+           *   can return 5.
+           */
+          push_op_stack(sc, sc->value);
+          if (sc->op_stack_now >= sc->op_stack_end)
+            resize_op_stack(sc);
+          sc->args = sc->nil;
+
+        EVAL_ARGS:                  /* first time, value = op, args = nil, code is args */
+          if (is_pair(sc->code))  /* evaluate current arg -- must check for pair here, not sc->nil (improper list as args) */
+            {
+              if ((sc->safety > NO_SAFETY) &&
+                  (!is_safety_checked(sc->code)))
+                {
+                  if (tree_is_cyclic(sc, sc->code))
+                    syntax_error_nr(sc, "attempt to evaluate a circular list: ~A", 39, sc->code);
+                  set_safety_checked(sc->code);
+                }
+            EVAL_ARGS_PAIR:
+              if (is_pair(car(sc->code)))
+                {
+                  eval_args_pair_car(sc);
+                  goto EVAL;
+                }
+              if (is_pair(cdr(sc->code)))
+                {
+                  s7_pointer car_code = car(sc->code); /* not a pair */
+                  sc->code = cdr(sc->code);
+                  sc->value = (is_symbol(car_code)) ? lookup_checked(sc, car_code) : T_Ext(car_code);
+                  /* sc->value is the current arg's value, sc->code is pointing to the next */
+
+                  /* cdr(sc->code) might not be a pair or nil here! (eq? #f . 1) -> sc->code is 1 */
+                  if (is_null(cdr(sc->code)))
+                    {
+                      if (eval_args_last_arg(sc)) goto EVAL;
+                      /* drop into APPLY */
+                    }
+                  else
+                    {
+                      /* here we know sc->code is a pair, cdr(sc->code) is not null, sc->value is the previous arg's value */
+                      sc->args = cons(sc, sc->value, sc->args);
+                      goto EVAL_ARGS_PAIR;
+                    }}
+              else eval_last_arg(sc, car(sc->code));
+              /* drop into APPLY */
+            }
+          else                       /* got all args -- go to apply */
+            {
+              /* *(--sc->op_stack_now) is the "function" (sc->value perhaps), sc->code is the arglist end, sc->args might be the preceding args reversed? */
+              if (is_not_null(sc->code))
+                improper_arglist_error_nr(sc);
+              sc->code = pop_op_stack(sc);
+              sc->args = proper_list_reverse_in_place(sc, sc->args);
+            }
+          /* turning this into a call on an array of functions was not a complete disaster, but tauto.scm was ~1.5% slower.
+           *   the array-index overhead is the same as the current switch statement's, but there was also the boolean+jump overhead,
+           *   and the function-local overhead currently otherwise 0 if inlined.
+           */
+        APPLY:
+        case OP_APPLY:
+          if (SHOW_EVAL_OPS) safe_print(fprintf(stderr, "  %s[%d]: op_apply %s (%s) to %s\n", __func__, __LINE__,
+                                                display_truncated(sc->code), s7_type_names[type(sc->code)], display_truncated(sc->args)));
+          switch (type(sc->code))
+            {
+            case T_C_FUNCTION:          sc->value = apply_c_function(sc, sc->code, sc->args); continue;
+            case T_C_RST_NO_REQ_FUNCTION: apply_c_rst_no_req_function(sc); continue;
+            case T_C_FUNCTION_STAR:     apply_c_function_star(sc);      continue;
+            case T_CONTINUATION:        call_with_current_continuation(sc); continue;
+            case T_GOTO:                call_with_exit(sc);                continue;
+            case T_C_OBJECT:                apply_c_object(sc);                continue;
+            case T_STRING:                apply_string(sc);                continue;
+            case T_HASH_TABLE:                apply_hash_table(sc);           continue;
+            case T_ITERATOR:                apply_iterator(sc);                continue;
+            case T_LET:                        apply_let(sc);                        continue;
+            case T_INT_VECTOR: case T_BYTE_VECTOR: case T_FLOAT_VECTOR:
+            case T_VECTOR:                 apply_vector(sc);                continue;
+            case T_SYNTAX:                apply_syntax(sc);                 goto TOP_NO_POP;
+            case T_PAIR:                if (apply_pair(sc)) continue;   goto APPLY;
+            case T_CLOSURE:             apply_closure(sc);              goto APPLY_LAMBDA;
+            case T_CLOSURE_STAR:        if (apply_closure_star(sc)) goto EVAL; goto BEGIN;
+            case T_C_MACRO:                  apply_c_macro(sc);                goto EVAL;
+            case T_MACRO:               apply_macro(sc);                goto APPLY_LAMBDA;
+            case T_BACRO:               apply_bacro(sc);                goto APPLY_LAMBDA;
+            case T_MACRO_STAR:          apply_macro_star(sc);           goto BEGIN;
+            case T_BACRO_STAR:          apply_bacro_star(sc);           goto BEGIN;
+            default:                    eval_apply_error_nr(sc);
+            }
+
+        case OP_MACRO_STAR_D: if (op_macro_star_d(sc))     goto EVAL_ARGS_TOP; goto BEGIN;
+        case OP_MACRO_D:      if (op_macro_d(sc, T_MACRO)) goto EVAL_ARGS_TOP; /* fall through presumably */
+
+        APPLY_LAMBDA:
+        case OP_APPLY_LAMBDA:
+          inline_apply_lambda(sc);
+          goto BEGIN;
+
+        case OP_LAMBDA_STAR_DEFAULT: if (op_lambda_star_default(sc)) goto EVAL; goto BEGIN;
+
+        case OP_MACROEXPAND_1:
+          switch (op_macroexpand_1(sc)) {case goto_begin: goto BEGIN; case goto_eval: goto EVAL; case goto_start: continue; default: goto APPLY_LAMBDA;}
+        case OP_MACROEXPAND:
+          switch (op_macroexpand(sc)) {case goto_begin: goto BEGIN; case goto_eval: goto EVAL; case goto_start: continue; default: goto APPLY_LAMBDA;}
+
+
+        HEAPSORT: if (op_heapsort(sc)) continue; if (sc->value != sc->F) goto APPLY;
+        case OP_SORT1: op_sort1(sc); goto APPLY;
+        case OP_SORT2: if (op_sort2(sc)) continue; goto HEAPSORT;
+        case OP_SORT:  if (!op_sort(sc)) goto HEAPSORT;
+        case OP_SORT3: if (op_sort3(sc)) continue; goto HEAPSORT;
+        case OP_SORT_PAIR_END:   sc->value = vector_into_list(sc, sc->value, car(sc->args)); continue;
+        case OP_SORT_VECTOR_END: sc->value = vector_into_fi_vector(sc->value, car(sc->args)); continue;
+        case OP_SORT_STRING_END: sc->value = vector_into_string(sc->value, car(sc->args)); continue;
 
 #if S7_DEBUGGING
-	case OP_MAP_UNWIND: /* this probably can't happen -- left on stack only if opt succeeds then func called */
-	  fprintf(stderr, "%s[%d]: op_map_unwind %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr);
-	  sc->map_call_ctr--;
-	  if (sc->map_call_ctr < 0) {fprintf(stderr, "%s[%d]: map ctr: %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr); sc->map_call_ctr = 0;}
-	  continue;
-#endif
-	case OP_MAP_GATHER: inline_op_map_gather(sc);
-	case OP_MAP: if (op_map(sc)) continue; goto APPLY;
-
-	case OP_MAP_GATHER_1: inline_op_map_gather(sc);
-	case OP_MAP_1: if (op_map_1(sc)) continue; goto BEGIN;
-
-	case OP_MAP_GATHER_2:
-	case OP_MAP_GATHER_3: inline_op_map_gather(sc);
-	case OP_MAP_2: if (op_map_2(sc)) continue; goto EVAL;
-
-	case OP_FOR_EACH:   if (op_for_each(sc)) continue;   goto APPLY;
-	case OP_FOR_EACH_1: if (inline_op_for_each_1(sc)) continue; goto BEGIN;
-
-	case OP_FOR_EACH_2:
-	case OP_FOR_EACH_3: if (inline_op_for_each_2(sc)) continue; goto EVAL;
-
-	case OP_MEMBER_IF:
-	case OP_MEMBER_IF1: if (op_member_if(sc)) continue; goto APPLY;
-
-	case OP_ASSOC_IF:
-	case OP_ASSOC_IF1:  if (op_assoc_if(sc)) continue;  goto APPLY;
-
-
-	case OP_SAFE_DOTIMES: /* gen form */
-	SAFE_DOTIMES:         /* check_do */
-	  switch (op_safe_dotimes(sc))
-	    {
-	    case goto_safe_do_end_clauses: if (is_null(sc->code)) continue; goto DO_END_CODE;
-	    case goto_do_end_clauses: goto DO_END_CLAUSES;
-	    case goto_eval:           goto EVAL;
-	    case goto_top_no_pop:     goto TOP_NO_POP;
-	    default:                  goto BEGIN;
-	    }
-
-	case OP_SAFE_DO:
-	SAFE_DO:             /* from check_do */
-	  switch (op_safe_do(sc)) /* mat */
-	    {
-	    case goto_safe_do_end_clauses:
-	      if (is_null(sc->code)) continue; /* multiple values (as test result) can't happen -- safe do loops involve counters by 1 to some integer end */
-	      goto DO_END_CODE;
-	    case goto_do_unchecked: goto DO_UNCHECKED;
-	    default: goto BEGIN;
-	    }
-
-	case OP_DOTIMES_P:
-	DOTIMES_P:           /* from check_do */
-	  switch (op_dotimes_p(sc))
-	    {
-	    case goto_do_end_clauses: goto DO_END_CLAUSES;
-	    case goto_do_unchecked:   goto DO_UNCHECKED;
-	    default:                  goto EVAL;
-	    }
-
-	case OP_DOX:
-	DOX:                  /* from check_do */
-	  switch (op_dox(sc)) /* lg fft exit */
-	    {
-	    case goto_do_end_clauses: goto DO_END_CLAUSES;
-	    case goto_start:          continue;
-	    case goto_top_no_pop:     goto TOP_NO_POP; /* includes dox_step_o */
-	    default:		      goto BEGIN;
-	  }
-
-	DO_NO_BODY:
-	case OP_DO_NO_BODY_NA_VARS:        op_do_no_body_na_vars(sc); goto EVAL;
-	case OP_DO_NO_BODY_NA_VARS_STEP:   if (op_do_no_body_na_vars_step(sc)) goto DO_END_CLAUSES; goto EVAL;
-	case OP_DO_NO_BODY_NA_VARS_STEP_1: if (op_do_no_body_na_vars_step_1(sc)) goto DO_END_CLAUSES; goto EVAL;
-
-	case OP_DO_NO_VARS_NO_OPT:   op_do_no_vars_no_opt(sc); /* fall through */
-	case OP_DO_NO_VARS_NO_OPT_1: if (op_do_no_vars_no_opt_1(sc)) goto DO_END_CLAUSES; goto BEGIN;
-	case OP_DO_NO_VARS:	     if (op_do_no_vars(sc))          goto DO_END_CLAUSES; goto BEGIN;
-	case OP_SAFE_DOTIMES_STEP_O: if (op_safe_dotimes_step_o(sc)) goto DO_END_CLAUSES; goto EVAL;
-	case OP_SAFE_DOTIMES_STEP:   if (op_safe_dotimes_step(sc))   goto DO_END_CLAUSES; goto EVAL;
-	case OP_SAFE_DO_STEP:        if (op_safe_do_step(sc))        goto DO_END_CLAUSES; goto BEGIN;
-	case OP_SIMPLE_DO:           if (op_simple_do(sc))           goto DO_END_CLAUSES; goto BEGIN;
-	case OP_SIMPLE_DO_STEP:      if (op_simple_do_step(sc))      goto DO_END_CLAUSES; goto BEGIN;
-	case OP_DOTIMES_STEP_O:      if (op_dotimes_step_o(sc))      goto DO_END_CLAUSES; goto EVAL;
-	case OP_DOX_INIT:            if (op_dox_init(sc))            goto DO_END_CLAUSES; goto BEGIN;
-	case OP_DOX_STEP:            if (op_dox_step_1(sc))          goto DO_END_CLAUSES; op_dox_step(sc);   goto BEGIN;
-	case OP_DOX_STEP_O:          if (op_dox_step_1(sc))          goto DO_END_CLAUSES; op_dox_step_o(sc); goto EVAL;
-	case OP_DOX_NO_BODY:         op_dox_no_body(sc);             continue;
-	case OP_DOX_PENDING_NO_BODY: op_dox_pending_no_body(sc);     goto DO_END_CLAUSES;
-
-	case OP_DO_INIT: if (op_do_init(sc)) goto DO_END; goto EVAL;
-
-	case OP_DO:
-	  if (is_null(check_do(sc)))
-	    switch (optimize_op(sc->code))
-	      {
- 	      case OP_DOX:	    goto DOX;
- 	      case OP_SAFE_DOTIMES: goto SAFE_DOTIMES;
- 	      case OP_DOTIMES_P:    goto DOTIMES_P;
- 	      case OP_SAFE_DO:	    goto SAFE_DO;
-	      case OP_DO_NO_BODY_NA_VARS: goto DO_NO_BODY;
- 	      case OP_DO_NO_VARS:   if (op_do_no_vars(sc)) goto DO_END_CLAUSES; goto BEGIN;
-	      case OP_DOX_NO_BODY:  op_dox_no_body(sc); continue;
-	      case OP_DOX_PENDING_NO_BODY: op_dox_pending_no_body(sc); goto DO_END_CLAUSES;
-	      default:              if (op_simple_do(sc)) goto DO_END_CLAUSES; goto BEGIN;
-	      }
-
-	case OP_DO_UNCHECKED:
-	  op_do_unchecked(sc);
-	DO_UNCHECKED:
-	  if (do_unchecked(sc)) goto EVAL;
-
-	DO_END:
-	case OP_DO_END:
-	  if (op_do_end(sc)) goto EVAL;
-
-	case OP_DO_END1:
-	  if (is_true(sc, sc->value))
-	    {
-	      goto_t next = op_do_end_true(sc);
-	      if (next == goto_start) continue;
-	      if (next == goto_eval) goto EVAL;
-	      goto FEED_TO;
-	    }
-	  else
-	    {
-	      goto_t next = op_do_end_false(sc);
-	      if (next == goto_begin) goto BEGIN;
-	      if (next == goto_do_end) goto DO_END;
-	      /* fall through */
-	    }
-
-	case OP_DO_STEP:  if (op_do_step(sc))  goto DO_END; goto EVAL;
-	case OP_DO_STEP2: if (op_do_step2(sc)) goto DO_END; goto EVAL;
-
-	DO_END_CLAUSES:
-	  if (do_end_clauses(sc)) continue;
-	DO_END_CODE:
-	  {
-	    goto_t next = do_end_code(sc);
-	    if (next == goto_eval) goto EVAL;
-	    if (next == goto_start) continue;
-	    goto FEED_TO;
-	  }
-
-
-	case OP_BEGIN_UNCHECKED:
-	  set_current_code(sc, sc->code);
-	  sc->code = T_Pair(cdr(sc->code));
-	  goto BEGIN;
-
-	case OP_BEGIN:
-	  if (op_begin(sc, sc->code)) continue;
-	  sc->code = T_Pair(cdr(sc->code));
-
-	case OP_BEGIN_HOOK:
-	  if (sc->begin_hook)
-	    {
-	      /* call_begin_hook might clobber sc->code? via s7_eval_string probably yes */
-	      set_current_code(sc, sc->code);
-	      if (call_begin_hook(sc))
-		return(sc->F);
-	    }
-	case OP_BEGIN_NO_HOOK:
-	  goto BEGIN;
-
-	case OP_BEGIN_2_UNCHECKED:
-	  push_stack_no_args(sc, OP_EVAL, caddr(sc->code));
-	  sc->code = cadr(sc->code);
-	  goto EVAL;
-
-	case OP_BEGIN_AA: sc->value = fx_begin_aa(sc, sc->code); continue;
-	case OP_BEGIN_NA: sc->value = fx_begin_na(sc, sc->code); continue;
-
-
-	case OP_EVAL: goto EVAL;
-	case OP_EVAL_STRING: op_eval_string(sc); goto EVAL;
-
-	case OP_QUOTE: sc->value = check_quote(sc, sc->code); continue;
-	case OP_QUOTE_UNCHECKED: sc->value = cadr(sc->code); continue;
-
-	case OP_DEFINE_FUNCHECKED: define_funchecked(sc);   continue;
-	case OP_DEFINE_CONSTANT1:  op_define_constant1(sc); continue;
-
-	case OP_DEFINE_CONSTANT_UNCHECKED:
-	  push_stack_no_args(sc, OP_DEFINE_CONSTANT1, cadr(sc->code));
-	  goto DEFCONS;
-
-	case OP_DEFINE_CONSTANT:
-	  if (op_define_constant(sc)) continue;
-
-	case OP_DEFINE_STAR: case OP_DEFINE:
-	  check_define(sc);
-
-	DEFCONS:
-	case OP_DEFINE_STAR_UNCHECKED:
-	case OP_DEFINE_UNCHECKED:
-	  if (op_define_unchecked(sc)) goto TOP_NO_POP;
-
-	case OP_DEFINE1: if (op_define1(sc)) goto APPLY;
-	case OP_DEFINE_WITH_SETTER: op_define_with_setter(sc); continue;
-
-	case OP_SET_opSq_A:     if (op_set_opsq_a(sc))     goto APPLY; continue;
-	case OP_SET_opSAq_A:	if (op_set_opsaq_a(sc))    goto APPLY; continue;
-	case OP_SET_opSAq_P:    if (op_set_opsaq_p(sc))    goto APPLY; goto EVAL;
-	case OP_SET_opSAq_P_1:  if (op_set_opsaq_p_1(sc))  goto APPLY; continue;
-	case OP_SET_opSAAq_A:	if (op_set_opsaaq_a(sc))   goto APPLY; continue;
-	case OP_SET_opSAAq_P:   if (op_set_opsaaq_p(sc))   goto APPLY; goto EVAL;
-	case OP_SET_opSAAq_P_1: if (op_set_opsaaq_p_1(sc)) goto APPLY; continue;
-
-	case OP_INCREMENT_BY_1: inline_op_increment_by_1(sc); continue;
-	case OP_DECREMENT_BY_1: op_decrement_by_1(sc); continue;
-	case OP_INCREMENT_SA:   op_increment_sa(sc);   continue;
-	case OP_INCREMENT_SAA:  op_increment_saa(sc);  continue;
-
-	case OP_SET_S_C:        op_set_s_c(sc);  continue;
-	case OP_SET_S_S:        op_set_s_s(sc);  continue;
-	case OP_SET_S_A:        op_set_s_a(sc);  continue;
-	case OP_SET_S_P:        op_set_s_p(sc);  goto EVAL;
-	case OP_SET_CONS:       op_set_cons(sc); continue;
- 	case OP_SET_SAFE:	op_set_safe(sc); continue;
-
-	case OP_SET_FROM_SETTER: slot_set_value(sc->code, sc->value); continue; /* mv caught in splice_in_values */
-	case OP_SET_FROM_LET_TEMP: op_set_from_let_temp(sc); continue;
-
-	case OP_SET2:
-	  switch (op_set2(sc)) /* imp */
-	    {
-	    case goto_eval:       goto EVAL;
-	    case goto_top_no_pop: goto TOP_NO_POP;
-	    case goto_start:      continue;
-	    case goto_apply:      goto APPLY;
-	    case goto_unopt:      goto UNOPT;
-	    default:              goto EVAL_ARGS; /* goto_eval_args in funcs called by op_set2, unopt */
-	    }
-
-	case OP_SET: check_set(sc);
-	case OP_SET_UNCHECKED:
-	SET_UNCHECKED:
-	  if (is_pair(cadr(sc->code)))             /* has setter */
-	    switch (set_implicit(sc))
-	      {
-	      case goto_top_no_pop: goto TOP_NO_POP;
-	      case goto_start:      continue;
-	      case goto_apply:      goto APPLY;
-	      case goto_unopt:      goto UNOPT;
-	      default:              goto EVAL_ARGS; /* very common, op_unopt at this point */
-	      }
-	case OP_SET_NORMAL: if (op_set_normal(sc)) goto EVAL;
-	case OP_SET1:       if (op_set1(sc)) continue; goto APPLY;
-
-	case OP_SET_WITH_LET_1: if (op_set_with_let_1(sc)) goto TOP_NO_POP; goto SET_WITH_LET;
-	case OP_SET_WITH_LET_2: if (op_set_with_let_2(sc)) continue;
-	SET_WITH_LET:
-	  activate_with_let(sc, sc->value);  /* this activates sc->value, so the set! will happen in that environment */
-	  if (is_pair(cadr(sc->code)))
-	    switch (set_implicit(sc))  /* imp misc */
-	      {
-	      case goto_top_no_pop: goto TOP_NO_POP;
-	      case goto_start:      continue;
-	      case goto_apply:      goto APPLY;
-	      case goto_unopt:      goto UNOPT;
-	      default:              goto EVAL_ARGS; /* unopt */
-	      }
-	  set_with_let_error_nr(sc);
-
-	case OP_IF:           op_if(sc);           goto EVAL;
-	case OP_IF_UNCHECKED: op_if_unchecked(sc); goto EVAL;
-	case OP_IF1:	      if (op_if1(sc)) goto EVAL; continue;
-
-	  #define if_a_p(sc) if (is_true(sc, fx_call(sc, cdr(sc->code))))
-	  #define if_not_a_p(sc) if (is_false(sc, fx_call(sc, opt3_pair(sc->code)))) /* cdadr(sc->code) */
-
-	case OP_IF_A_C_C:     sc->value = (is_true(sc, fx_call(sc, cdr(sc->code)))) ? opt1_con(sc->code) : opt2_con(sc->code); continue;
-	case OP_IF_A_A:       sc->value = (is_true(sc, fx_call(sc, cdr(sc->code)))) ? fx_call(sc, opt1_pair(sc->code)) : sc->unspecified; continue;
-	case OP_IF_S_A_A:     sc->value = (is_true(sc, lookup(sc, cadr(sc->code)))) ? fx_call(sc, opt1_pair(sc->code)) : fx_call(sc, opt2_pair(sc->code)); continue;
-	case OP_IF_A_A_A:     sc->value = (is_true(sc, fx_call(sc, cdr(sc->code)))) ? fx_call(sc, opt1_pair(sc->code)) : fx_call(sc, opt2_pair(sc->code)); continue;
-	case OP_IF_A_A_P:     if_a_p(sc) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_A_P_A:     if_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
-	case OP_IF_NOT_A_A:   sc->value = (is_false(sc, fx_call(sc, opt1_pair(sc->code)))) ? fx_call(sc, opt2_pair(sc->code)) : sc->unspecified; continue;
-	case OP_IF_NOT_A_A_A: sc->value = (is_false(sc, fx_call(sc, opt1_pair(sc->code)))) ? fx_call(sc, opt2_pair(sc->code)) : fx_call(sc, opt3_pair(sc->code)); continue;
-	case OP_IF_AND2_S_A:  sc->value = fx_if_and2_s_a(sc, sc->code); continue;
-
-	  #define call_bfunc(Sc, Expr) ((s7_bfunc)opt3_any(cdr(Sc->code)))(Sc, Expr)
-	case OP_IF_B_A:   sc->value = (call_bfunc(sc, cadr(sc->code))) ? fx_call(sc, opt1_pair(sc->code)) : sc->unspecified; continue;
-	case OP_IF_B_A_P: if (call_bfunc(sc, cadr(sc->code))) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_B_P_A: if (call_bfunc(sc, cadr(sc->code))) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
-	case OP_IF_B_P_P: if (call_bfunc(sc, cadr(sc->code))) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	  #define if_s_p(sc) if (is_true(sc, lookup(sc, cadr(sc->code))))
-	  #define if_not_s_p(sc) if (is_false(sc, lookup(sc, opt1_sym(cdr(sc->code))))) /* cadadr(sc->code) */
-
-	case OP_IF_S_P:   if_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_S_R:   if_s_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_S_P_P: if_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_S_N:   if_not_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_S_N_N: if_not_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_S_P_A: if_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
-	case OP_IF_S_A_P: if_s_p(sc) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	case OP_IF_A_P:   if_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_A_R:   if_a_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_A_P_P: if_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_A_N:   if_not_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_A_N_N: if_not_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	case OP_IF_B_P:   if (call_bfunc(sc, cadr(sc->code))) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_B_R:   if (call_bfunc(sc, cadr(sc->code))) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_B_N_N: if (call_bfunc(sc, car(opt3_pair(sc->code)))) {sc->code = opt2_any(sc->code); goto EVAL;} sc->code = opt1_any(sc->code); goto EVAL;
-
-	  #define if_is_type_s_p(sc) if (gen_type_match(sc, lookup(sc, opt2_sym(cdr(sc->code))), opt3_byte(cdr(sc->code))))
-	  #define if_is_not_type_s_p(sc) if (!gen_type_match(sc, lookup(sc, opt2_sym(cdr(sc->code))), opt3_byte(cdr(sc->code))))
-
-	case OP_IF_IS_TYPE_S_P:   if_is_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_IS_TYPE_S_R:   if_is_type_s_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_IS_TYPE_S_P_P: if_is_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_IS_TYPE_S_N:   if_is_not_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_IS_TYPE_S_N_N: if_is_not_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_IS_TYPE_S_A_A: if_is_type_s_p(sc) sc->value = fx_call(sc, opt1_pair(sc->code)); else sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
-	case OP_IF_IS_TYPE_S_P_A: if_is_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
-	case OP_IF_IS_TYPE_S_A_P: if_is_type_s_p(sc) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	  #define if_opsq_p(sc) set_car(sc->t1_1, lookup(sc, opt2_sym(cdr(sc->code)))); if (is_true(sc, fn_proc(cadr(sc->code))(sc, sc->t1_1)))
-	  #define if_not_opsq_p(sc) set_car(sc->t1_1, lookup(sc, opt2_sym(cdr(sc->code)))); if (is_false(sc, fn_proc(opt1_pair(cdr(sc->code)))(sc, sc->t1_1))) /* cadadr */
-
-	case OP_IF_opSq_P:   if_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_opSq_R:   if_opsq_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_opSq_P_P: if_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_opSq_N:   if_not_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_opSq_N_N: if_not_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	  #define if_and2_p(sc) if ((is_true(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) && (is_true(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
-	  #define if_not_and2_p(sc) if ((is_false(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) || (is_false(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
-
-	case OP_IF_AND2_P:   if_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_AND2_R:   if_and2_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_AND2_P_P: if_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_AND2_N:   if_not_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_AND2_N_N: if_not_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	  #define if_or2_p(sc) if ((is_true(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) || (is_true(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
-	  #define if_not_or2_p(sc) if ((is_false(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) && (is_false(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
-
-	case OP_IF_OR2_P:   if_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_OR2_R:   if_or2_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_OR2_P_P: if_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_OR2_N:   if_not_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_OR2_N_N: if_not_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	  #define if_and3_p(sc) if ((is_true(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) && \
+        case OP_MAP_UNWIND: /* this probably can't happen -- left on stack only if opt succeeds then func called */
+          fprintf(stderr, "%s[%d]: op_map_unwind %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr);
+          sc->map_call_ctr--;
+          if (sc->map_call_ctr < 0) {fprintf(stderr, "%s[%d]: map ctr: %" ld64 "\n", __func__, __LINE__, sc->map_call_ctr); sc->map_call_ctr = 0;}
+          continue;
+#endif
+        case OP_MAP_GATHER: inline_op_map_gather(sc);
+        case OP_MAP: if (op_map(sc)) continue; goto APPLY;
+
+        case OP_MAP_GATHER_1: inline_op_map_gather(sc);
+        case OP_MAP_1: if (op_map_1(sc)) continue; goto BEGIN;
+
+        case OP_MAP_GATHER_2:
+        case OP_MAP_GATHER_3: inline_op_map_gather(sc);
+        case OP_MAP_2: if (op_map_2(sc)) continue; goto EVAL;
+
+        case OP_FOR_EACH:   if (op_for_each(sc)) continue;   goto APPLY;
+        case OP_FOR_EACH_1: if (inline_op_for_each_1(sc)) continue; goto BEGIN;
+
+        case OP_FOR_EACH_2:
+        case OP_FOR_EACH_3: if (inline_op_for_each_2(sc)) continue; goto EVAL;
+
+        case OP_MEMBER_IF:
+        case OP_MEMBER_IF1: if (op_member_if(sc)) continue; goto APPLY;
+
+        case OP_ASSOC_IF:
+        case OP_ASSOC_IF1:  if (op_assoc_if(sc)) continue;  goto APPLY;
+
+
+        case OP_SAFE_DOTIMES: /* gen form */
+        SAFE_DOTIMES:         /* check_do */
+          switch (op_safe_dotimes(sc))
+            {
+            case goto_safe_do_end_clauses: if (is_null(sc->code)) continue; goto DO_END_CODE;
+            case goto_do_end_clauses: goto DO_END_CLAUSES;
+            case goto_eval:           goto EVAL;
+            case goto_top_no_pop:     goto TOP_NO_POP;
+            default:                  goto BEGIN;
+            }
+
+        case OP_SAFE_DO:
+        SAFE_DO:             /* from check_do */
+          switch (op_safe_do(sc)) /* mat */
+            {
+            case goto_safe_do_end_clauses:
+              if (is_null(sc->code)) continue; /* multiple values (as test result) can't happen -- safe do loops involve counters by 1 to some integer end */
+              goto DO_END_CODE;
+            case goto_do_unchecked: goto DO_UNCHECKED;
+            default: goto BEGIN;
+            }
+
+        case OP_DOTIMES_P:
+        DOTIMES_P:           /* from check_do */
+          switch (op_dotimes_p(sc))
+            {
+            case goto_do_end_clauses: goto DO_END_CLAUSES;
+            case goto_do_unchecked:   goto DO_UNCHECKED;
+            default:                  goto EVAL;
+            }
+
+        case OP_DOX:
+        DOX:                  /* from check_do */
+          switch (op_dox(sc)) /* lg fft exit */
+            {
+            case goto_do_end_clauses: goto DO_END_CLAUSES;
+            case goto_start:          continue;
+            case goto_top_no_pop:     goto TOP_NO_POP; /* includes dox_step_o */
+            default:                      goto BEGIN;
+          }
+
+        DO_NO_BODY:
+        case OP_DO_NO_BODY_NA_VARS:        op_do_no_body_na_vars(sc); goto EVAL;
+        case OP_DO_NO_BODY_NA_VARS_STEP:   if (op_do_no_body_na_vars_step(sc)) goto DO_END_CLAUSES; goto EVAL;
+        case OP_DO_NO_BODY_NA_VARS_STEP_1: if (op_do_no_body_na_vars_step_1(sc)) goto DO_END_CLAUSES; goto EVAL;
+
+        case OP_DO_NO_VARS_NO_OPT:   op_do_no_vars_no_opt(sc); /* fall through */
+        case OP_DO_NO_VARS_NO_OPT_1: if (op_do_no_vars_no_opt_1(sc)) goto DO_END_CLAUSES; goto BEGIN;
+        case OP_DO_NO_VARS:             if (op_do_no_vars(sc))          goto DO_END_CLAUSES; goto BEGIN;
+        case OP_SAFE_DOTIMES_STEP_O: if (op_safe_dotimes_step_o(sc)) goto DO_END_CLAUSES; goto EVAL;
+        case OP_SAFE_DOTIMES_STEP:   if (op_safe_dotimes_step(sc))   goto DO_END_CLAUSES; goto EVAL;
+        case OP_SAFE_DO_STEP:        if (op_safe_do_step(sc))        goto DO_END_CLAUSES; goto BEGIN;
+        case OP_SIMPLE_DO:           if (op_simple_do(sc))           goto DO_END_CLAUSES; goto BEGIN;
+        case OP_SIMPLE_DO_STEP:      if (op_simple_do_step(sc))      goto DO_END_CLAUSES; goto BEGIN;
+        case OP_DOTIMES_STEP_O:      if (op_dotimes_step_o(sc))      goto DO_END_CLAUSES; goto EVAL;
+        case OP_DOX_INIT:            if (op_dox_init(sc))            goto DO_END_CLAUSES; goto BEGIN;
+        case OP_DOX_STEP:            if (op_dox_step_1(sc))          goto DO_END_CLAUSES; op_dox_step(sc);   goto BEGIN;
+        case OP_DOX_STEP_O:          if (op_dox_step_1(sc))          goto DO_END_CLAUSES; op_dox_step_o(sc); goto EVAL;
+        case OP_DOX_NO_BODY:         op_dox_no_body(sc);             continue;
+        case OP_DOX_PENDING_NO_BODY: op_dox_pending_no_body(sc);     goto DO_END_CLAUSES;
+
+        case OP_DO_INIT: if (op_do_init(sc)) goto DO_END; goto EVAL;
+
+        case OP_DO:
+          if (is_null(check_do(sc)))
+            switch (optimize_op(sc->code))
+              {
+               case OP_DOX:            goto DOX;
+               case OP_SAFE_DOTIMES: goto SAFE_DOTIMES;
+               case OP_DOTIMES_P:    goto DOTIMES_P;
+               case OP_SAFE_DO:            goto SAFE_DO;
+              case OP_DO_NO_BODY_NA_VARS: goto DO_NO_BODY;
+               case OP_DO_NO_VARS:   if (op_do_no_vars(sc)) goto DO_END_CLAUSES; goto BEGIN;
+              case OP_DOX_NO_BODY:  op_dox_no_body(sc); continue;
+              case OP_DOX_PENDING_NO_BODY: op_dox_pending_no_body(sc); goto DO_END_CLAUSES;
+              default:              if (op_simple_do(sc)) goto DO_END_CLAUSES; goto BEGIN;
+              }
+
+        case OP_DO_UNCHECKED:
+          op_do_unchecked(sc);
+        DO_UNCHECKED:
+          if (do_unchecked(sc)) goto EVAL;
+
+        DO_END:
+        case OP_DO_END:
+          if (op_do_end(sc)) goto EVAL;
+
+        case OP_DO_END1:
+          if (is_true(sc, sc->value))
+            {
+              goto_t next = op_do_end_true(sc);
+              if (next == goto_start) continue;
+              if (next == goto_eval) goto EVAL;
+              goto FEED_TO;
+            }
+          else
+            {
+              goto_t next = op_do_end_false(sc);
+              if (next == goto_begin) goto BEGIN;
+              if (next == goto_do_end) goto DO_END;
+              /* fall through */
+            }
+
+        case OP_DO_STEP:  if (op_do_step(sc))  goto DO_END; goto EVAL;
+        case OP_DO_STEP2: if (op_do_step2(sc)) goto DO_END; goto EVAL;
+
+        DO_END_CLAUSES:
+          if (do_end_clauses(sc)) continue;
+        DO_END_CODE:
+          {
+            goto_t next = do_end_code(sc);
+            if (next == goto_eval) goto EVAL;
+            if (next == goto_start) continue;
+            goto FEED_TO;
+          }
+
+
+        case OP_BEGIN_UNCHECKED:
+          set_current_code(sc, sc->code);
+          sc->code = T_Pair(cdr(sc->code));
+          goto BEGIN;
+
+        case OP_BEGIN:
+          if (op_begin(sc, sc->code)) continue;
+          sc->code = T_Pair(cdr(sc->code));
+
+        case OP_BEGIN_HOOK:
+          if (sc->begin_hook)
+            {
+              /* call_begin_hook might clobber sc->code? via s7_eval_string probably yes */
+              set_current_code(sc, sc->code);
+              if (call_begin_hook(sc))
+                return(sc->F);
+            }
+        case OP_BEGIN_NO_HOOK:
+          goto BEGIN;
+
+        case OP_BEGIN_2_UNCHECKED:
+          push_stack_no_args(sc, OP_EVAL, caddr(sc->code));
+          sc->code = cadr(sc->code);
+          goto EVAL;
+
+        case OP_BEGIN_AA: sc->value = fx_begin_aa(sc, sc->code); continue;
+        case OP_BEGIN_NA: sc->value = fx_begin_na(sc, sc->code); continue;
+
+
+        case OP_EVAL: goto EVAL;
+        case OP_EVAL_STRING: op_eval_string(sc); goto EVAL;
+
+        case OP_QUOTE: sc->value = check_quote(sc, sc->code); continue;
+        case OP_QUOTE_UNCHECKED: sc->value = cadr(sc->code); continue;
+
+        case OP_DEFINE_FUNCHECKED: define_funchecked(sc);   continue;
+        case OP_DEFINE_CONSTANT1:  op_define_constant1(sc); continue;
+
+        case OP_DEFINE_CONSTANT_UNCHECKED:
+          push_stack_no_args(sc, OP_DEFINE_CONSTANT1, cadr(sc->code));
+          goto DEFCONS;
+
+        case OP_DEFINE_CONSTANT:
+          if (op_define_constant(sc)) continue;
+
+        case OP_DEFINE_STAR: case OP_DEFINE:
+          check_define(sc);
+
+        DEFCONS:
+        case OP_DEFINE_STAR_UNCHECKED:
+        case OP_DEFINE_UNCHECKED:
+          if (op_define_unchecked(sc)) goto TOP_NO_POP;
+
+        case OP_DEFINE1: if (op_define1(sc)) goto APPLY;
+        case OP_DEFINE_WITH_SETTER: op_define_with_setter(sc); continue;
+
+        case OP_SET_opSq_A:     if (op_set_opsq_a(sc))     goto APPLY; continue;
+        case OP_SET_opSAq_A:        if (op_set_opsaq_a(sc))    goto APPLY; continue;
+        case OP_SET_opSAq_P:    if (op_set_opsaq_p(sc))    goto APPLY; goto EVAL;
+        case OP_SET_opSAq_P_1:  if (op_set_opsaq_p_1(sc))  goto APPLY; continue;
+        case OP_SET_opSAAq_A:        if (op_set_opsaaq_a(sc))   goto APPLY; continue;
+        case OP_SET_opSAAq_P:   if (op_set_opsaaq_p(sc))   goto APPLY; goto EVAL;
+        case OP_SET_opSAAq_P_1: if (op_set_opsaaq_p_1(sc)) goto APPLY; continue;
+
+        case OP_INCREMENT_BY_1: inline_op_increment_by_1(sc); continue;
+        case OP_DECREMENT_BY_1: op_decrement_by_1(sc); continue;
+        case OP_INCREMENT_SA:   op_increment_sa(sc);   continue;
+        case OP_INCREMENT_SAA:  op_increment_saa(sc);  continue;
+
+        case OP_SET_S_C:        op_set_s_c(sc);  continue;
+        case OP_SET_S_S:        op_set_s_s(sc);  continue;
+        case OP_SET_S_A:        op_set_s_a(sc);  continue;
+        case OP_SET_S_P:        op_set_s_p(sc);  goto EVAL;
+        case OP_SET_CONS:       op_set_cons(sc); continue;
+         case OP_SET_SAFE:        op_set_safe(sc); continue;
+
+        case OP_SET_FROM_SETTER: slot_set_value(sc->code, sc->value); continue; /* mv caught in splice_in_values */
+        case OP_SET_FROM_LET_TEMP: op_set_from_let_temp(sc); continue;
+
+        case OP_SET2:
+          switch (op_set2(sc)) /* imp */
+            {
+            case goto_eval:       goto EVAL;
+            case goto_top_no_pop: goto TOP_NO_POP;
+            case goto_start:      continue;
+            case goto_apply:      goto APPLY;
+            case goto_unopt:      goto UNOPT;
+            default:              goto EVAL_ARGS; /* goto_eval_args in funcs called by op_set2, unopt */
+            }
+
+        case OP_SET: check_set(sc);
+        case OP_SET_UNCHECKED:
+        SET_UNCHECKED:
+          if (is_pair(cadr(sc->code)))             /* has setter */
+            switch (set_implicit(sc))
+              {
+              case goto_top_no_pop: goto TOP_NO_POP;
+              case goto_start:      continue;
+              case goto_apply:      goto APPLY;
+              case goto_unopt:      goto UNOPT;
+              default:              goto EVAL_ARGS; /* very common, op_unopt at this point */
+              }
+        case OP_SET_NORMAL: if (op_set_normal(sc)) goto EVAL;
+        case OP_SET1:       if (op_set1(sc)) continue; goto APPLY;
+
+        case OP_SET_WITH_LET_1: if (op_set_with_let_1(sc)) goto TOP_NO_POP; goto SET_WITH_LET;
+        case OP_SET_WITH_LET_2: if (op_set_with_let_2(sc)) continue;
+        SET_WITH_LET:
+          activate_with_let(sc, sc->value);  /* this activates sc->value, so the set! will happen in that environment */
+          if (is_pair(cadr(sc->code)))
+            switch (set_implicit(sc))  /* imp misc */
+              {
+              case goto_top_no_pop: goto TOP_NO_POP;
+              case goto_start:      continue;
+              case goto_apply:      goto APPLY;
+              case goto_unopt:      goto UNOPT;
+              default:              goto EVAL_ARGS; /* unopt */
+              }
+          set_with_let_error_nr(sc);
+
+        case OP_IF:           op_if(sc);           goto EVAL;
+        case OP_IF_UNCHECKED: op_if_unchecked(sc); goto EVAL;
+        case OP_IF1:              if (op_if1(sc)) goto EVAL; continue;
+
+          #define if_a_p(sc) if (is_true(sc, fx_call(sc, cdr(sc->code))))
+          #define if_not_a_p(sc) if (is_false(sc, fx_call(sc, opt3_pair(sc->code)))) /* cdadr(sc->code) */
+
+        case OP_IF_A_C_C:     sc->value = (is_true(sc, fx_call(sc, cdr(sc->code)))) ? opt1_con(sc->code) : opt2_con(sc->code); continue;
+        case OP_IF_A_A:       sc->value = (is_true(sc, fx_call(sc, cdr(sc->code)))) ? fx_call(sc, opt1_pair(sc->code)) : sc->unspecified; continue;
+        case OP_IF_S_A_A:     sc->value = (is_true(sc, lookup(sc, cadr(sc->code)))) ? fx_call(sc, opt1_pair(sc->code)) : fx_call(sc, opt2_pair(sc->code)); continue;
+        case OP_IF_A_A_A:     sc->value = (is_true(sc, fx_call(sc, cdr(sc->code)))) ? fx_call(sc, opt1_pair(sc->code)) : fx_call(sc, opt2_pair(sc->code)); continue;
+        case OP_IF_A_A_P:     if_a_p(sc) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_A_P_A:     if_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
+        case OP_IF_NOT_A_A:   sc->value = (is_false(sc, fx_call(sc, opt1_pair(sc->code)))) ? fx_call(sc, opt2_pair(sc->code)) : sc->unspecified; continue;
+        case OP_IF_NOT_A_A_A: sc->value = (is_false(sc, fx_call(sc, opt1_pair(sc->code)))) ? fx_call(sc, opt2_pair(sc->code)) : fx_call(sc, opt3_pair(sc->code)); continue;
+        case OP_IF_AND2_S_A:  sc->value = fx_if_and2_s_a(sc, sc->code); continue;
+
+          #define call_bfunc(Sc, Expr) ((s7_bfunc)opt3_any(cdr(Sc->code)))(Sc, Expr)
+        case OP_IF_B_A:   sc->value = (call_bfunc(sc, cadr(sc->code))) ? fx_call(sc, opt1_pair(sc->code)) : sc->unspecified; continue;
+        case OP_IF_B_A_P: if (call_bfunc(sc, cadr(sc->code))) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_B_P_A: if (call_bfunc(sc, cadr(sc->code))) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
+        case OP_IF_B_P_P: if (call_bfunc(sc, cadr(sc->code))) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+
+          #define if_s_p(sc) if (is_true(sc, lookup(sc, cadr(sc->code))))
+          #define if_not_s_p(sc) if (is_false(sc, lookup(sc, opt1_sym(cdr(sc->code))))) /* cadadr(sc->code) */
+
+        case OP_IF_S_P:   if_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_S_R:   if_s_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_S_P_P: if_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_S_N:   if_not_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_S_N_N: if_not_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_S_P_A: if_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
+        case OP_IF_S_A_P: if_s_p(sc) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
+
+        case OP_IF_A_P:   if_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_A_R:   if_a_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_A_P_P: if_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_A_N:   if_not_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_A_N_N: if_not_a_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+
+        case OP_IF_B_P:   if (call_bfunc(sc, cadr(sc->code))) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_B_R:   if (call_bfunc(sc, cadr(sc->code))) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_B_N_N: if (call_bfunc(sc, car(opt3_pair(sc->code)))) {sc->code = opt2_any(sc->code); goto EVAL;} sc->code = opt1_any(sc->code); goto EVAL;
+
+          #define if_is_type_s_p(sc) if (gen_type_match(sc, lookup(sc, opt2_sym(cdr(sc->code))), opt3_byte(cdr(sc->code))))
+          #define if_is_not_type_s_p(sc) if (!gen_type_match(sc, lookup(sc, opt2_sym(cdr(sc->code))), opt3_byte(cdr(sc->code))))
+
+        case OP_IF_IS_TYPE_S_P:   if_is_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_IS_TYPE_S_R:   if_is_type_s_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_IS_TYPE_S_P_P: if_is_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_IS_TYPE_S_N:   if_is_not_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_IS_TYPE_S_N_N: if_is_not_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_IS_TYPE_S_A_A: if_is_type_s_p(sc) sc->value = fx_call(sc, opt1_pair(sc->code)); else sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
+        case OP_IF_IS_TYPE_S_P_A: if_is_type_s_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = fx_call(sc, opt2_pair(sc->code)); continue;
+        case OP_IF_IS_TYPE_S_A_P: if_is_type_s_p(sc) {sc->value = fx_call(sc, opt1_pair(sc->code)); continue;} sc->code = opt2_any(sc->code); goto EVAL;
+
+          #define if_opsq_p(sc) set_car(sc->t1_1, lookup(sc, opt2_sym(cdr(sc->code)))); if (is_true(sc, fn_proc(cadr(sc->code))(sc, sc->t1_1)))
+          #define if_not_opsq_p(sc) set_car(sc->t1_1, lookup(sc, opt2_sym(cdr(sc->code)))); if (is_false(sc, fn_proc(opt1_pair(cdr(sc->code)))(sc, sc->t1_1))) /* cadadr */
+
+        case OP_IF_opSq_P:   if_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_opSq_R:   if_opsq_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_opSq_P_P: if_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_opSq_N:   if_not_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_opSq_N_N: if_not_opsq_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+
+          #define if_and2_p(sc) if ((is_true(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) && (is_true(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
+          #define if_not_and2_p(sc) if ((is_false(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) || (is_false(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
+
+        case OP_IF_AND2_P:   if_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_AND2_R:   if_and2_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_AND2_P_P: if_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_AND2_N:   if_not_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_AND2_N_N: if_not_and2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+
+          #define if_or2_p(sc) if ((is_true(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) || (is_true(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
+          #define if_not_or2_p(sc) if ((is_false(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) && (is_false(sc, fx_call(sc, opt3_pair(cdr(sc->code))))))
+
+        case OP_IF_OR2_P:   if_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_OR2_R:   if_or2_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_OR2_P_P: if_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_OR2_N:   if_not_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_OR2_N_N: if_not_or2_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+
+          #define if_and3_p(sc) if ((is_true(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) && \
                                        (is_true(sc, fx_call(sc, opt3_pair(cdr(sc->code))))) && (is_true(sc, fx_call(sc, opt1_pair(cdr(sc->code))))))
-	  #define if_not_and3_p(sc) if ((is_false(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) || \
+          #define if_not_and3_p(sc) if ((is_false(sc, fx_call(sc, opt2_pair(cdr(sc->code))))) || \
                                           (is_false(sc, fx_call(sc, opt3_pair(cdr(sc->code))))) || (is_false(sc, fx_call(sc, opt1_pair(cdr(sc->code))))))
 
-	case OP_IF_AND3_P:   if_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_AND3_R:   if_and3_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
-	case OP_IF_AND3_P_P: if_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-	case OP_IF_AND3_N:   if_not_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
-	case OP_IF_AND3_N_N: if_not_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
-
-	    #define if_p_push(op) do {push_stack_no_args(sc, op, opt2_any(cdr(sc->code)));  sc->code = opt3_any(cdr(sc->code));} while (0)
-	case OP_IF_P_P:      if_p_push(OP_IF_PP); goto EVAL;
-	case OP_IF_P_N:      if_p_push(OP_IF_PN); goto EVAL;
-	case OP_IF_P_P_P:    if_p_push(OP_IF_PPP); goto EVAL;
-	case OP_IF_P_R:      if_p_push(OP_IF_PR); goto EVAL;
-	case OP_IF_P_N_N:    if_p_push(OP_IF_PRR); goto EVAL;
-
-	    #define if_bp_push(op) do {push_stack_no_args(sc, op, opt2_any(cdr(sc->code)));  sc->code = opt3_pair(cdr(sc->code));} while (0)
-	case OP_IF_ANDP_P:   if_bp_push(OP_IF_PP);  goto AND_P;
-	case OP_IF_ANDP_R:   if_bp_push(OP_IF_PR);  goto AND_P;
-	case OP_IF_ANDP_P_P: if_bp_push(OP_IF_PPP); goto AND_P;
-	case OP_IF_ANDP_N:   if_bp_push(OP_IF_PR);  goto AND_P;
-	case OP_IF_ANDP_N_N: if_bp_push(OP_IF_PRR); goto AND_P;
-
-	case OP_IF_ORP_P:    if_bp_push(OP_IF_PP);  goto OR_P;
-	case OP_IF_ORP_R:    if_bp_push(OP_IF_PR);  goto OR_P;
-	case OP_IF_ORP_P_P:  if_bp_push(OP_IF_PPP); goto OR_P;
-	case OP_IF_ORP_N:    if_bp_push(OP_IF_PR);  goto OR_P;
-	case OP_IF_ORP_N_N:  if_bp_push(OP_IF_PRR); goto OR_P;
-
-	case OP_IF_PP:       if (sc->value != sc->F) goto EVAL; sc->value = sc->unspecified; continue;
-	case OP_IF_PN:
-	case OP_IF_PR:       if (sc->value == sc->F) goto EVAL; sc->value = sc->unspecified; continue;
-	case OP_IF_PPP:      sc->code = (sc->value != sc->F) ? car(sc->code) : cadr(sc->code); goto EVAL;
-	case OP_IF_PRR:      sc->code = (sc->value == sc->F) ? car(sc->code) : cadr(sc->code); goto EVAL;
-
-	case OP_WHEN:        check_when(sc);                   goto EVAL;
-	case OP_WHEN_S:      if (op_when_s(sc)) continue;      goto EVAL;
-	case OP_WHEN_A:      if (op_when_a(sc)) continue;      goto EVAL;
+        case OP_IF_AND3_P:   if_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_AND3_R:   if_and3_p(sc) {sc->value = sc->unspecified; continue;} sc->code = opt1_any(sc->code); goto EVAL;
+        case OP_IF_AND3_P_P: if_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+        case OP_IF_AND3_N:   if_not_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->value = sc->unspecified; continue;
+        case OP_IF_AND3_N_N: if_not_and3_p(sc) {sc->code = opt1_any(sc->code); goto EVAL;} sc->code = opt2_any(sc->code); goto EVAL;
+
+            #define if_p_push(op) do {push_stack_no_args(sc, op, opt2_any(cdr(sc->code)));  sc->code = opt3_any(cdr(sc->code));} while (0)
+        case OP_IF_P_P:      if_p_push(OP_IF_PP); goto EVAL;
+        case OP_IF_P_N:      if_p_push(OP_IF_PN); goto EVAL;
+        case OP_IF_P_P_P:    if_p_push(OP_IF_PPP); goto EVAL;
+        case OP_IF_P_R:      if_p_push(OP_IF_PR); goto EVAL;
+        case OP_IF_P_N_N:    if_p_push(OP_IF_PRR); goto EVAL;
+
+            #define if_bp_push(op) do {push_stack_no_args(sc, op, opt2_any(cdr(sc->code)));  sc->code = opt3_pair(cdr(sc->code));} while (0)
+        case OP_IF_ANDP_P:   if_bp_push(OP_IF_PP);  goto AND_P;
+        case OP_IF_ANDP_R:   if_bp_push(OP_IF_PR);  goto AND_P;
+        case OP_IF_ANDP_P_P: if_bp_push(OP_IF_PPP); goto AND_P;
+        case OP_IF_ANDP_N:   if_bp_push(OP_IF_PR);  goto AND_P;
+        case OP_IF_ANDP_N_N: if_bp_push(OP_IF_PRR); goto AND_P;
+
+        case OP_IF_ORP_P:    if_bp_push(OP_IF_PP);  goto OR_P;
+        case OP_IF_ORP_R:    if_bp_push(OP_IF_PR);  goto OR_P;
+        case OP_IF_ORP_P_P:  if_bp_push(OP_IF_PPP); goto OR_P;
+        case OP_IF_ORP_N:    if_bp_push(OP_IF_PR);  goto OR_P;
+        case OP_IF_ORP_N_N:  if_bp_push(OP_IF_PRR); goto OR_P;
+
+        case OP_IF_PP:       if (sc->value != sc->F) goto EVAL; sc->value = sc->unspecified; continue;
+        case OP_IF_PN:
+        case OP_IF_PR:       if (sc->value == sc->F) goto EVAL; sc->value = sc->unspecified; continue;
+        case OP_IF_PPP:      sc->code = (sc->value != sc->F) ? car(sc->code) : cadr(sc->code); goto EVAL;
+        case OP_IF_PRR:      sc->code = (sc->value == sc->F) ? car(sc->code) : cadr(sc->code); goto EVAL;
+
+        case OP_WHEN:        check_when(sc);                   goto EVAL;
+        case OP_WHEN_S:      if (op_when_s(sc)) continue;      goto EVAL;
+        case OP_WHEN_A:      if (op_when_a(sc)) continue;      goto EVAL;
         case OP_WHEN_P:      op_when_p(sc);                    goto EVAL;
-	case OP_WHEN_AND_2A: if (op_when_and_2a(sc)) continue; goto EVAL;
-	case OP_WHEN_AND_3A: if (op_when_and_3a(sc)) continue; goto EVAL;
-	case OP_WHEN_AND_AP: if (op_when_and_ap(sc)) continue; goto EVAL;
-	case OP_WHEN_PP:     if (op_when_pp(sc)) continue;     goto EVAL;
-
-	case OP_UNLESS:      check_unless(sc);                 goto EVAL;
-	case OP_UNLESS_S:    if (op_unless_s(sc)) continue;    goto EVAL;
-	case OP_UNLESS_A:    if (op_unless_a(sc)) continue;    goto EVAL;
+        case OP_WHEN_AND_2A: if (op_when_and_2a(sc)) continue; goto EVAL;
+        case OP_WHEN_AND_3A: if (op_when_and_3a(sc)) continue; goto EVAL;
+        case OP_WHEN_AND_AP: if (op_when_and_ap(sc)) continue; goto EVAL;
+        case OP_WHEN_PP:     if (op_when_pp(sc)) continue;     goto EVAL;
+
+        case OP_UNLESS:      check_unless(sc);                 goto EVAL;
+        case OP_UNLESS_S:    if (op_unless_s(sc)) continue;    goto EVAL;
+        case OP_UNLESS_A:    if (op_unless_a(sc)) continue;    goto EVAL;
         case OP_UNLESS_P:    op_unless_p(sc);                  goto EVAL;
-	case OP_UNLESS_PP:   if (op_unless_pp(sc)) continue;   goto EVAL;
-
-
-	case OP_COND_FEED:   if (op_cond_feed(sc)) goto EVAL; /* else fall through */
-	case OP_COND_FEED_1: if (is_true(sc, sc->value)) {op_cond_feed_1(sc); goto EVAL;} sc->value = sc->unspecified; continue;
-
-	case OP_COND:           check_cond(sc);
-	case OP_COND_UNCHECKED: if (op_cond_unchecked(sc)) goto EVAL;
-	case OP_COND1:          if (op_cond1(sc)) goto TOP_NO_POP; /* else fall through */
-	FEED_TO:
-	  if (feed_to(sc)) goto APPLY;
-	  goto EVAL;
-	case OP_FEED_TO_1:       sc->code = sc->value; goto APPLY;   /* sc->args saved in feed_to via push_stack */
-
-	case OP_COND_SIMPLE:     if (op_cond_simple(sc)) goto EVAL;
-	case OP_COND1_SIMPLE:    if (op_cond1_simple(sc)) goto TOP_NO_POP; goto BEGIN;
-	case OP_COND_SIMPLE_O:   if (op_cond_simple_o(sc)) goto EVAL;
-	case OP_COND1_SIMPLE_O:  if (op_cond1_simple_o(sc)) continue;  goto EVAL;
-
-	case OP_COND_NA_NA:      sc->value = fx_cond_na_na(sc, sc->code); continue;
-	case OP_COND_NA_NP:      if (op_cond_na_np(sc)) continue;   goto EVAL;
-	case OP_COND_NA_NP_1:    if (op_cond_na_np_1(sc)) continue; goto EVAL;
-	case OP_COND_NA_NP_O:    if (inline_op_cond_na_np_o(sc)) continue; goto EVAL;
-	case OP_COND_NA_2E:      if (op_cond_na_2e(sc)) continue; goto EVAL;
-	case OP_COND_NA_3E:      if (op_cond_na_3e(sc)) continue; goto EVAL;
-
-
-	case OP_AND:
-	  if (check_and(sc, sc->code)) continue;
-	case OP_AND_P:
-	  sc->code = cdr(sc->code);
-	AND_P:                        /* this code (and OR_P below) is ugly, but the pretty version (procedurized) is much slower */
-	  if (has_fx(sc->code))       /* all fx_proc's are set via fx_choose which can return nil, but it is not cleared when type is */
-	    {                         /*   so, if (fx_proc(sc->code)) here and in OR_P is not safe */
-	      sc->value = fx_call(sc, sc->code);
-	      if (is_false(sc, sc->value)) continue;
-	      sc->code = cdr(sc->code);
-	      if (is_null(sc->code)) continue;  /* this order of checks appears to be faster than any of the alternatives */
-	      goto AND_P;
-	    }
-	  if (is_pair(cdr(sc->code)))  /* apparently exactly as fast as is_not_null */
-	    push_stack_no_args(sc, OP_AND_P1, cdr(sc->code));
-	  sc->code = car(sc->code);
-	  goto EVAL;
-
-	case OP_AND_P1:
-	  if ((is_false(sc, sc->value)) ||
-	      (is_null(sc->code)))
-	    continue;
-	  goto AND_P;
-
-	case OP_AND_AP:      if (op_and_ap(sc)) continue; goto EVAL;
-	case OP_AND_2A:      sc->value = fx_and_2a(sc, sc->code); continue;
-	case OP_AND_3A:      sc->value = fx_and_3a(sc, sc->code); continue;
-	case OP_AND_N:       sc->value = fx_and_n(sc, sc->code); continue;
-	case OP_AND_S_2:     sc->value = fx_and_s_2(sc, sc->code); continue;
-	case OP_AND_PAIR_P:  if (op_and_pair_p(sc)) continue; goto EVAL;
-	case OP_AND_SAFE_P1: op_and_safe_p1(sc); goto EVAL;
-	case OP_AND_SAFE_P2: if (op_and_safe_p2(sc)) continue; goto EVAL;
-	case OP_AND_SAFE_P3: if (op_and_safe_p3(sc)) continue; goto EVAL;
-	case OP_AND_SAFE_P_REST: if (is_true(sc, sc->value)) sc->value = fx_and_n(sc, sc->code); continue;
-
-
-	case OP_OR:
-	  if (check_or(sc, sc->code)) continue;
-	case OP_OR_P:
-	  sc->code = cdr(sc->code);
-	OR_P:
-	  if (has_fx(sc->code))
-	    {
-	      sc->value = fx_call(sc, sc->code);
-	      if (is_true(sc, sc->value)) continue;
-	      sc->code = cdr(sc->code);
-	      if (is_null(sc->code)) continue;
-	      goto OR_P;
-	    }
-	  if (is_pair(cdr(sc->code)))
-	    push_stack_no_args(sc, OP_OR_P1, cdr(sc->code));
-	  sc->code = car(sc->code);
-	  goto EVAL;
-
-	case OP_OR_P1:
-	  if ((is_true(sc, sc->value)) ||
-	      (is_null(sc->code)))
-	    continue;
-	  goto OR_P;
-
-	case OP_OR_AP:       if (op_or_ap(sc)) continue; goto EVAL;
-	case OP_OR_2A:       sc->value = fx_or_2a(sc, sc->code);       continue;
-	case OP_OR_S_2:      sc->value = fx_or_s_2(sc, sc->code);      continue;
-	case OP_OR_S_TYPE_2: sc->value = fx_or_s_type_2(sc, sc->code); continue;
-	case OP_OR_3A:       sc->value = fx_or_3a(sc, sc->code);       continue;
-	case OP_OR_N:        sc->value = fx_or_n(sc, sc->code);        continue;
-
-
-	case OP_NAMED_LET_NO_VARS: op_named_let_no_vars(sc);   goto BEGIN;
-	case OP_NAMED_LET:	   if (op_named_let(sc))       goto BEGIN; goto EVAL;
-	case OP_NAMED_LET_A:       op_named_let_a(sc);         goto BEGIN;
-	case OP_NAMED_LET_AA:      op_named_let_aa(sc);        goto BEGIN;
-	case OP_NAMED_LET_NA:      if (op_named_let_na(sc))    goto BEGIN; goto EVAL;
-
-	case OP_LET: 	           if (op_let(sc))             goto BEGIN; goto EVAL;
-	case OP_LET_UNCHECKED:	   if (op_let_unchecked(sc))   goto BEGIN; goto EVAL;
-	case OP_LET1:	           if (op_let1(sc))            goto BEGIN; goto EVAL;
-	case OP_LET_NO_VARS: 	   op_let_no_vars(sc);	       goto BEGIN;
-
-	case OP_LET_A_A_OLD:       op_let_a_a_old(sc);         continue;
-	case OP_LET_A_A_NEW:       op_let_a_a_new(sc);         continue;
-	case OP_LET_A_NA_OLD:      op_let_a_na_old(sc);        continue;
-	case OP_LET_A_NA_NEW:      op_let_a_na_new(sc);        continue;
-	case OP_LET_NA_OLD: 	   op_let_na_old(sc);	       goto BEGIN;
-	case OP_LET_NA_NEW: 	   inline_op_let_na_new(sc);   goto BEGIN;
-	case OP_LET_2A_OLD: 	   op_let_2a_old(sc);	       goto EVAL;
-	case OP_LET_2A_NEW: 	   op_let_2a_new(sc);	       goto EVAL;
-	case OP_LET_3A_OLD: 	   op_let_3a_old(sc);	       goto EVAL;
-	case OP_LET_3A_NEW: 	   op_let_3a_new(sc);	       goto EVAL;
-	case OP_LET_ONE_OLD:	   op_let_one_old(sc);	       goto EVAL;
-	case OP_LET_ONE_NEW:	   op_let_one_new(sc);	       goto EVAL;
-	case OP_LET_ONE_P_OLD: 	   op_let_one_p_old(sc);       goto EVAL;
-	case OP_LET_ONE_P_NEW: 	   op_let_one_p_new(sc);       goto EVAL;
-
-	case OP_LET_A_OLD:         op_let_a_old(sc);        sc->code = cdr(sc->code);  goto BEGIN;
-	case OP_LET_A_NEW:         inline_op_let_a_new(sc); sc->code = cdr(sc->code);  goto BEGIN;
-	case OP_LET_A_OLD_2:       inline_op_let_a_old(sc); push_stack_no_args(sc, OP_EVAL, caddr(sc->code)); sc->code = cadr(sc->code); goto EVAL;
-	case OP_LET_A_NEW_2:       inline_op_let_a_new(sc); push_stack_no_args(sc, OP_EVAL, caddr(sc->code)); sc->code = cadr(sc->code); goto EVAL;
-	case OP_LET_A_P_OLD:       inline_op_let_a_old(sc); sc->code = cadr(sc->code); goto EVAL;
-	case OP_LET_A_P_NEW:       inline_op_let_a_new(sc); sc->code = cadr(sc->code); goto EVAL;
-	case OP_LET_ONE_OLD_1:     op_let_one_old_1(sc);    goto BEGIN;
-	case OP_LET_ONE_P_OLD_1:   op_let_one_p_old_1(sc);  goto EVAL;
-	case OP_LET_ONE_NEW_1:	   set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, opt2_sym(sc->code), sc->value)); goto BEGIN;
-	case OP_LET_ONE_P_NEW_1:   set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, opt2_sym(sc->code), sc->value)); sc->code = car(sc->code); goto EVAL;
-	case OP_LET_opaSSq_OLD:    op_let_opassq_old(sc);   goto BEGIN;
-	case OP_LET_opaSSq_NEW:    op_let_opassq_new(sc);   goto BEGIN;
-
-	case OP_LET_STAR_NA:       op_let_star_na(sc);     goto BEGIN;
-	case OP_LET_STAR_NA_A:     op_let_star_na_a(sc);   continue;
-
-	case OP_NAMED_LET_STAR:    op_named_let_star(sc);  goto EVAL;
-	case OP_LET_STAR2:         op_let_star2(sc);       goto EVAL;
-	case OP_LET_STAR:          if (check_let_star(sc)) goto EVAL; goto BEGIN;
-	case OP_LET_STAR1:         if (op_let_star1(sc))   goto EVAL; goto BEGIN;
-	case OP_LET_STAR_SHADOWED: if (op_let_star_shadowed(sc)) goto EVAL; goto BEGIN;
-
-	case OP_LETREC:            check_letrec(sc, true);
-	case OP_LETREC_UNCHECKED:  if (op_letrec_unchecked(sc)) goto EVAL; goto BEGIN;
-	case OP_LETREC1:           if (op_letrec1(sc)) goto EVAL; goto BEGIN;
-
-	case OP_LETREC_STAR:           check_letrec(sc, false);
-	case OP_LETREC_STAR_UNCHECKED: if (op_letrec_star_unchecked(sc)) goto EVAL; goto BEGIN;
-	case OP_LETREC_STAR1:          if (op_letrec_star1(sc)) goto EVAL; goto BEGIN;
-
-
-	case OP_LET_TEMPORARILY: check_let_temporarily(sc);
-	case OP_LET_TEMP_UNCHECKED: op_let_temp_unchecked(sc); goto LET_TEMP_INIT1;
-
-	case OP_LET_TEMP_INIT1:
-	  op_let_temp_init1_1(sc);
-	LET_TEMP_INIT1:
-	  if (op_let_temp_init1(sc)) goto EVAL;
-	case OP_LET_TEMP_INIT2:
-	  switch (op_let_temp_init2(sc)) /* let misc obj */
-	    {
-	    case goto_begin:         goto BEGIN;
-	    case goto_eval:          goto EVAL;
-	    case goto_set_unchecked: goto SET_UNCHECKED;
-	    case fall_through:
-	    default:                 break;
-	    }
-
-	case OP_LET_TEMP_DONE:
-	  sc->code = sc->value;
-	  push_stack(sc, OP_GC_PROTECT, sc->args, sc->value);  /* save let-temp body val as sc->code */
-	case OP_LET_TEMP_DONE1:
-	  if (op_let_temp_done1(sc)) continue;
-	  goto SET_UNCHECKED;
-
-	case OP_LET_TEMP_S7:        if(op_let_temp_s7(sc))         goto BEGIN; sc->value = sc->nil; continue;
-	case OP_LET_TEMP_S7_DIRECT: if (op_let_temp_s7_direct(sc)) goto BEGIN; sc->value = sc->nil; continue;
-	case OP_LET_TEMP_NA:        if (op_let_temp_na(sc))        goto BEGIN; sc->value = sc->nil; continue;
-	case OP_LET_TEMP_A:         if (op_let_temp_a(sc))         goto BEGIN; sc->value = sc->nil; continue;
-	case OP_LET_TEMP_SETTER:    if (op_let_temp_setter(sc))    goto BEGIN; sc->value = sc->nil; continue;
-	case OP_LET_TEMP_A_A:       sc->value = fx_let_temp_a_a(sc, sc->code); continue;
-
-	case OP_LET_TEMP_UNWIND:           op_let_temp_unwind(sc);           continue;
-	case OP_LET_TEMP_S7_UNWIND:        op_let_temp_s7_unwind(sc);        continue;
-	case OP_LET_TEMP_S7_DIRECT_UNWIND: op_let_temp_s7_direct_unwind(sc); continue;
-	case OP_LET_TEMP_SETTER_UNWIND:    op_let_temp_setter_unwind(sc);    continue;
-
-
-	case OP_EVAL_MACRO:    op_eval_macro(sc);                  goto EVAL;
-	case OP_EVAL_MACRO_MV: if (op_eval_macro_mv(sc)) continue; goto EVAL;
-	case OP_EXPANSION:     op_finish_expansion(sc);            continue;
-
-	case OP_DEFINE_BACRO:     case OP_DEFINE_BACRO_STAR:
-	case OP_DEFINE_EXPANSION: case OP_DEFINE_EXPANSION_STAR:
-	case OP_DEFINE_MACRO:     case OP_DEFINE_MACRO_STAR:
-	  op_define_macro(sc);
-	  continue;
-
-	case OP_MACRO: case OP_BACRO: case OP_MACRO_STAR: case OP_BACRO_STAR:
-	  op_macro(sc);
-	  continue;
-
-	case OP_LAMBDA:                sc->value = op_lambda(sc, sc->code);           continue;
-	case OP_LAMBDA_UNCHECKED:      sc->value = op_lambda_unchecked(sc, sc->code); continue;
-	case OP_LAMBDA_STAR:           op_lambda_star(sc);                            continue;
-	case OP_LAMBDA_STAR_UNCHECKED: op_lambda_star_unchecked(sc);                  continue;
-
-
-	case OP_CASE:                     /* car(sc->code) is the selector */
-	  /* selector A, key type: E=eq (symbol/char), I=integer, G=any, S=single keys and single bodies */
-	  if (check_case(sc)) goto EVAL; else goto G_G;  /* selector is a symbol or constant, stupid "else" to shut up the compiler */
-
-	case OP_CASE_A_G_G: sc->value = fx_call(sc, cdr(sc->code));
-	G_G: case OP_CASE_G_G: if (op_case_g_g(sc)) goto TOP_NO_POP; goto FEED_TO;
-	case OP_CASE_A_E_S: sc->value = fx_call(sc, cdr(sc->code));
-	case OP_CASE_E_S:   op_case_e_s(sc); goto EVAL;
+        case OP_UNLESS_PP:   if (op_unless_pp(sc)) continue;   goto EVAL;
+
+
+        case OP_COND_FEED:   if (op_cond_feed(sc)) goto EVAL; /* else fall through */
+        case OP_COND_FEED_1: if (is_true(sc, sc->value)) {op_cond_feed_1(sc); goto EVAL;} sc->value = sc->unspecified; continue;
+
+        case OP_COND:           check_cond(sc);
+        case OP_COND_UNCHECKED: if (op_cond_unchecked(sc)) goto EVAL;
+        case OP_COND1:          if (op_cond1(sc)) goto TOP_NO_POP; /* else fall through */
+        FEED_TO:
+          if (feed_to(sc)) goto APPLY;
+          goto EVAL;
+        case OP_FEED_TO_1:       sc->code = sc->value; goto APPLY;   /* sc->args saved in feed_to via push_stack */
+
+        case OP_COND_SIMPLE:     if (op_cond_simple(sc)) goto EVAL;
+        case OP_COND1_SIMPLE:    if (op_cond1_simple(sc)) goto TOP_NO_POP; goto BEGIN;
+        case OP_COND_SIMPLE_O:   if (op_cond_simple_o(sc)) goto EVAL;
+        case OP_COND1_SIMPLE_O:  if (op_cond1_simple_o(sc)) continue;  goto EVAL;
+
+        case OP_COND_NA_NA:      sc->value = fx_cond_na_na(sc, sc->code); continue;
+        case OP_COND_NA_NP:      if (op_cond_na_np(sc)) continue;   goto EVAL;
+        case OP_COND_NA_NP_1:    if (op_cond_na_np_1(sc)) continue; goto EVAL;
+        case OP_COND_NA_NP_O:    if (inline_op_cond_na_np_o(sc)) continue; goto EVAL;
+        case OP_COND_NA_2E:      if (op_cond_na_2e(sc)) continue; goto EVAL;
+        case OP_COND_NA_3E:      if (op_cond_na_3e(sc)) continue; goto EVAL;
+
+
+        case OP_AND:
+          if (check_and(sc, sc->code)) continue;
+        case OP_AND_P:
+          sc->code = cdr(sc->code);
+        AND_P:                        /* this code (and OR_P below) is ugly, but the pretty version (procedurized) is much slower */
+          if (has_fx(sc->code))       /* all fx_proc's are set via fx_choose which can return nil, but it is not cleared when type is */
+            {                         /*   so, if (fx_proc(sc->code)) here and in OR_P is not safe */
+              sc->value = fx_call(sc, sc->code);
+              if (is_false(sc, sc->value)) continue;
+              sc->code = cdr(sc->code);
+              if (is_null(sc->code)) continue;  /* this order of checks appears to be faster than any of the alternatives */
+              goto AND_P;
+            }
+          if (is_pair(cdr(sc->code)))  /* apparently exactly as fast as is_not_null */
+            push_stack_no_args(sc, OP_AND_P1, cdr(sc->code));
+          sc->code = car(sc->code);
+          goto EVAL;
+
+        case OP_AND_P1:
+          if ((is_false(sc, sc->value)) ||
+              (is_null(sc->code)))
+            continue;
+          goto AND_P;
+
+        case OP_AND_AP:      if (op_and_ap(sc)) continue; goto EVAL;
+        case OP_AND_2A:      sc->value = fx_and_2a(sc, sc->code); continue;
+        case OP_AND_3A:      sc->value = fx_and_3a(sc, sc->code); continue;
+        case OP_AND_N:       sc->value = fx_and_n(sc, sc->code); continue;
+        case OP_AND_S_2:     sc->value = fx_and_s_2(sc, sc->code); continue;
+        case OP_AND_PAIR_P:  if (op_and_pair_p(sc)) continue; goto EVAL;
+        case OP_AND_SAFE_P1: op_and_safe_p1(sc); goto EVAL;
+        case OP_AND_SAFE_P2: if (op_and_safe_p2(sc)) continue; goto EVAL;
+        case OP_AND_SAFE_P3: if (op_and_safe_p3(sc)) continue; goto EVAL;
+        case OP_AND_SAFE_P_REST: if (is_true(sc, sc->value)) sc->value = fx_and_n(sc, sc->code); continue;
+
+
+        case OP_OR:
+          if (check_or(sc, sc->code)) continue;
+        case OP_OR_P:
+          sc->code = cdr(sc->code);
+        OR_P:
+          if (has_fx(sc->code))
+            {
+              sc->value = fx_call(sc, sc->code);
+              if (is_true(sc, sc->value)) continue;
+              sc->code = cdr(sc->code);
+              if (is_null(sc->code)) continue;
+              goto OR_P;
+            }
+          if (is_pair(cdr(sc->code)))
+            push_stack_no_args(sc, OP_OR_P1, cdr(sc->code));
+          sc->code = car(sc->code);
+          goto EVAL;
+
+        case OP_OR_P1:
+          if ((is_true(sc, sc->value)) ||
+              (is_null(sc->code)))
+            continue;
+          goto OR_P;
+
+        case OP_OR_AP:       if (op_or_ap(sc)) continue; goto EVAL;
+        case OP_OR_2A:       sc->value = fx_or_2a(sc, sc->code);       continue;
+        case OP_OR_S_2:      sc->value = fx_or_s_2(sc, sc->code);      continue;
+        case OP_OR_S_TYPE_2: sc->value = fx_or_s_type_2(sc, sc->code); continue;
+        case OP_OR_3A:       sc->value = fx_or_3a(sc, sc->code);       continue;
+        case OP_OR_N:        sc->value = fx_or_n(sc, sc->code);        continue;
+
+
+        case OP_NAMED_LET_NO_VARS: op_named_let_no_vars(sc);   goto BEGIN;
+        case OP_NAMED_LET:           if (op_named_let(sc))       goto BEGIN; goto EVAL;
+        case OP_NAMED_LET_A:       op_named_let_a(sc);         goto BEGIN;
+        case OP_NAMED_LET_AA:      op_named_let_aa(sc);        goto BEGIN;
+        case OP_NAMED_LET_NA:      if (op_named_let_na(sc))    goto BEGIN; goto EVAL;
+
+        case OP_LET:                    if (op_let(sc))             goto BEGIN; goto EVAL;
+        case OP_LET_UNCHECKED:           if (op_let_unchecked(sc))   goto BEGIN; goto EVAL;
+        case OP_LET1:                   if (op_let1(sc))            goto BEGIN; goto EVAL;
+        case OP_LET_NO_VARS:            op_let_no_vars(sc);               goto BEGIN;
+
+        case OP_LET_A_A_OLD:       op_let_a_a_old(sc);         continue;
+        case OP_LET_A_A_NEW:       op_let_a_a_new(sc);         continue;
+        case OP_LET_A_NA_OLD:      op_let_a_na_old(sc);        continue;
+        case OP_LET_A_NA_NEW:      op_let_a_na_new(sc);        continue;
+        case OP_LET_NA_OLD:            op_let_na_old(sc);               goto BEGIN;
+        case OP_LET_NA_NEW:            inline_op_let_na_new(sc);   goto BEGIN;
+        case OP_LET_2A_OLD:            op_let_2a_old(sc);               goto EVAL;
+        case OP_LET_2A_NEW:            op_let_2a_new(sc);               goto EVAL;
+        case OP_LET_3A_OLD:            op_let_3a_old(sc);               goto EVAL;
+        case OP_LET_3A_NEW:            op_let_3a_new(sc);               goto EVAL;
+        case OP_LET_ONE_OLD:           op_let_one_old(sc);               goto EVAL;
+        case OP_LET_ONE_NEW:           op_let_one_new(sc);               goto EVAL;
+        case OP_LET_ONE_P_OLD:            op_let_one_p_old(sc);       goto EVAL;
+        case OP_LET_ONE_P_NEW:            op_let_one_p_new(sc);       goto EVAL;
+
+        case OP_LET_A_OLD:         op_let_a_old(sc);        sc->code = cdr(sc->code);  goto BEGIN;
+        case OP_LET_A_NEW:         inline_op_let_a_new(sc); sc->code = cdr(sc->code);  goto BEGIN;
+        case OP_LET_A_OLD_2:       inline_op_let_a_old(sc); push_stack_no_args(sc, OP_EVAL, caddr(sc->code)); sc->code = cadr(sc->code); goto EVAL;
+        case OP_LET_A_NEW_2:       inline_op_let_a_new(sc); push_stack_no_args(sc, OP_EVAL, caddr(sc->code)); sc->code = cadr(sc->code); goto EVAL;
+        case OP_LET_A_P_OLD:       inline_op_let_a_old(sc); sc->code = cadr(sc->code); goto EVAL;
+        case OP_LET_A_P_NEW:       inline_op_let_a_new(sc); sc->code = cadr(sc->code); goto EVAL;
+        case OP_LET_ONE_OLD_1:     op_let_one_old_1(sc);    goto BEGIN;
+        case OP_LET_ONE_P_OLD_1:   op_let_one_p_old_1(sc);  goto EVAL;
+        case OP_LET_ONE_NEW_1:           set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, opt2_sym(sc->code), sc->value)); goto BEGIN;
+        case OP_LET_ONE_P_NEW_1:   set_curlet(sc, inline_make_let_with_slot(sc, sc->curlet, opt2_sym(sc->code), sc->value)); sc->code = car(sc->code); goto EVAL;
+        case OP_LET_opaSSq_OLD:    op_let_opassq_old(sc);   goto BEGIN;
+        case OP_LET_opaSSq_NEW:    op_let_opassq_new(sc);   goto BEGIN;
+
+        case OP_LET_STAR_NA:       op_let_star_na(sc);     goto BEGIN;
+        case OP_LET_STAR_NA_A:     op_let_star_na_a(sc);   continue;
+
+        case OP_NAMED_LET_STAR:    op_named_let_star(sc);  goto EVAL;
+        case OP_LET_STAR2:         op_let_star2(sc);       goto EVAL;
+        case OP_LET_STAR:          if (check_let_star(sc)) goto EVAL; goto BEGIN;
+        case OP_LET_STAR1:         if (op_let_star1(sc))   goto EVAL; goto BEGIN;
+        case OP_LET_STAR_SHADOWED: if (op_let_star_shadowed(sc)) goto EVAL; goto BEGIN;
+
+        case OP_LETREC:            check_letrec(sc, true);
+        case OP_LETREC_UNCHECKED:  if (op_letrec_unchecked(sc)) goto EVAL; goto BEGIN;
+        case OP_LETREC1:           if (op_letrec1(sc)) goto EVAL; goto BEGIN;
+
+        case OP_LETREC_STAR:           check_letrec(sc, false);
+        case OP_LETREC_STAR_UNCHECKED: if (op_letrec_star_unchecked(sc)) goto EVAL; goto BEGIN;
+        case OP_LETREC_STAR1:          if (op_letrec_star1(sc)) goto EVAL; goto BEGIN;
+
+
+        case OP_LET_TEMPORARILY: check_let_temporarily(sc);
+        case OP_LET_TEMP_UNCHECKED: op_let_temp_unchecked(sc); goto LET_TEMP_INIT1;
+
+        case OP_LET_TEMP_INIT1:
+          op_let_temp_init1_1(sc);
+        LET_TEMP_INIT1:
+          if (op_let_temp_init1(sc)) goto EVAL;
+        case OP_LET_TEMP_INIT2:
+          switch (op_let_temp_init2(sc)) /* let misc obj */
+            {
+            case goto_begin:         goto BEGIN;
+            case goto_eval:          goto EVAL;
+            case goto_set_unchecked: goto SET_UNCHECKED;
+            case fall_through:
+            default:                 break;
+            }
+
+        case OP_LET_TEMP_DONE:
+          sc->code = sc->value;
+          push_stack(sc, OP_GC_PROTECT, sc->args, sc->value);  /* save let-temp body val as sc->code */
+        case OP_LET_TEMP_DONE1:
+          if (op_let_temp_done1(sc)) continue;
+          goto SET_UNCHECKED;
+
+        case OP_LET_TEMP_S7:        if(op_let_temp_s7(sc))         goto BEGIN; sc->value = sc->nil; continue;
+        case OP_LET_TEMP_S7_DIRECT: if (op_let_temp_s7_direct(sc)) goto BEGIN; sc->value = sc->nil; continue;
+        case OP_LET_TEMP_NA:        if (op_let_temp_na(sc))        goto BEGIN; sc->value = sc->nil; continue;
+        case OP_LET_TEMP_A:         if (op_let_temp_a(sc))         goto BEGIN; sc->value = sc->nil; continue;
+        case OP_LET_TEMP_SETTER:    if (op_let_temp_setter(sc))    goto BEGIN; sc->value = sc->nil; continue;
+        case OP_LET_TEMP_A_A:       sc->value = fx_let_temp_a_a(sc, sc->code); continue;
+
+        case OP_LET_TEMP_UNWIND:           op_let_temp_unwind(sc);           continue;
+        case OP_LET_TEMP_S7_UNWIND:        op_let_temp_s7_unwind(sc);        continue;
+        case OP_LET_TEMP_S7_DIRECT_UNWIND: op_let_temp_s7_direct_unwind(sc); continue;
+        case OP_LET_TEMP_SETTER_UNWIND:    op_let_temp_setter_unwind(sc);    continue;
+
+
+        case OP_EVAL_MACRO:    op_eval_macro(sc);                  goto EVAL;
+        case OP_EVAL_MACRO_MV: if (op_eval_macro_mv(sc)) continue; goto EVAL;
+        case OP_EXPANSION:     op_finish_expansion(sc);            continue;
+
+        case OP_DEFINE_BACRO:     case OP_DEFINE_BACRO_STAR:
+        case OP_DEFINE_EXPANSION: case OP_DEFINE_EXPANSION_STAR:
+        case OP_DEFINE_MACRO:     case OP_DEFINE_MACRO_STAR:
+          op_define_macro(sc);
+          continue;
+
+        case OP_MACRO: case OP_BACRO: case OP_MACRO_STAR: case OP_BACRO_STAR:
+          op_macro(sc);
+          continue;
+
+        case OP_LAMBDA:                sc->value = op_lambda(sc, sc->code);           continue;
+        case OP_LAMBDA_UNCHECKED:      sc->value = op_lambda_unchecked(sc, sc->code); continue;
+        case OP_LAMBDA_STAR:           op_lambda_star(sc);                            continue;
+        case OP_LAMBDA_STAR_UNCHECKED: op_lambda_star_unchecked(sc);                  continue;
+
+
+        case OP_CASE:                     /* car(sc->code) is the selector */
+          /* selector A, key type: E=eq (symbol/char), I=integer, G=any, S=single keys and single bodies */
+          if (check_case(sc)) goto EVAL; else goto G_G;  /* selector is a symbol or constant, stupid "else" to shut up the compiler */
+
+        case OP_CASE_A_G_G: sc->value = fx_call(sc, cdr(sc->code));
+        G_G: case OP_CASE_G_G: if (op_case_g_g(sc)) goto TOP_NO_POP; goto FEED_TO;
+        case OP_CASE_A_E_S: sc->value = fx_call(sc, cdr(sc->code));
+        case OP_CASE_E_S:   op_case_e_s(sc); goto EVAL;
 #if (!WITH_GMP)
-	case OP_CASE_P_I_S: push_stack_no_args_direct(sc, OP_CASE_I_S); sc->code = cadr(sc->code); goto EVAL;
-	case OP_CASE_A_I_S: sc->value = fx_call(sc, cdr(sc->code));
-	case OP_CASE_I_S:   if (op_case_i_s(sc)) continue; goto EVAL;
-#endif
-	case OP_CASE_A_G_S: sc->value = fx_call(sc, cdr(sc->code)); /* this almost never happens? */
-	case OP_CASE_G_S:   op_case_g_s(sc); goto EVAL;
-
-	case OP_CASE_A_E_G: sc->value = fx_call(sc, cdr(sc->code));
-	case OP_CASE_E_G:   if (op_case_e_g_1(sc, sc->value, is_simple(sc->value))) goto TOP_NO_POP; goto FEED_TO;
-	case OP_CASE_A_S_G:  /* splitting this case out matters in lint */
-	  sc->value = fx_call(sc, cdr(sc->code));
-	  if (op_case_e_g_1(sc, sc->value, is_case_key(sc->value))) goto TOP_NO_POP; else goto FEED_TO;
-
-	case OP_CASE_P_G_G: push_stack_no_args_direct(sc, OP_CASE_G_G); sc->code = cadr(sc->code); goto EVAL;
-	case OP_CASE_P_E_S: push_stack_no_args_direct(sc, OP_CASE_E_S); sc->code = cadr(sc->code); goto EVAL;
-	case OP_CASE_P_G_S: push_stack_no_args_direct(sc, OP_CASE_G_S); sc->code = cadr(sc->code); goto EVAL;
-	case OP_CASE_P_E_G: push_stack_no_args_direct(sc, OP_CASE_E_G); sc->code = cadr(sc->code); goto EVAL;
+        case OP_CASE_P_I_S: push_stack_no_args_direct(sc, OP_CASE_I_S); sc->code = cadr(sc->code); goto EVAL;
+        case OP_CASE_A_I_S: sc->value = fx_call(sc, cdr(sc->code));
+        case OP_CASE_I_S:   if (op_case_i_s(sc)) continue; goto EVAL;
+#endif
+        case OP_CASE_A_G_S: sc->value = fx_call(sc, cdr(sc->code)); /* this almost never happens? */
+        case OP_CASE_G_S:   op_case_g_s(sc); goto EVAL;
+
+        case OP_CASE_A_E_G: sc->value = fx_call(sc, cdr(sc->code));
+        case OP_CASE_E_G:   if (op_case_e_g_1(sc, sc->value, is_simple(sc->value))) goto TOP_NO_POP; goto FEED_TO;
+        case OP_CASE_A_S_G:  /* splitting this case out matters in lint */
+          sc->value = fx_call(sc, cdr(sc->code));
+          if (op_case_e_g_1(sc, sc->value, is_case_key(sc->value))) goto TOP_NO_POP; else goto FEED_TO;
+
+        case OP_CASE_P_G_G: push_stack_no_args_direct(sc, OP_CASE_G_G); sc->code = cadr(sc->code); goto EVAL;
+        case OP_CASE_P_E_S: push_stack_no_args_direct(sc, OP_CASE_E_S); sc->code = cadr(sc->code); goto EVAL;
+        case OP_CASE_P_G_S: push_stack_no_args_direct(sc, OP_CASE_G_S); sc->code = cadr(sc->code); goto EVAL;
+        case OP_CASE_P_E_G: push_stack_no_args_direct(sc, OP_CASE_E_G); sc->code = cadr(sc->code); goto EVAL;
 #if (!WITH_GMP)
-	case OP_CASE_A_I_S_A: sc->value = fx_case_a_i_s_a(sc, sc->code); continue;
-#endif
-	case OP_CASE_A_E_S_A: sc->value = fx_case_a_e_s_a(sc, sc->code); continue;
-	case OP_CASE_A_G_S_A: sc->value = fx_case_a_g_s_a(sc, sc->code); continue;
-	case OP_CASE_A_S_G_A: sc->value = fx_case_a_s_g_a(sc, sc->code); continue;
-
-
-	case OP_ERROR_QUIT:
-	  if (sc->stack_end <= sc->stack_start) stack_reset(sc);  /* sets stack_end to stack_start, then pushes op_eval_done, (can <= be <?) */
-	  return(sc->F);
-
-	case OP_ERROR_HOOK_QUIT:
-	  op_error_hook_quit(sc);
-
-	case OP_EVAL_DONE:
-	  return(sc->F);
-
-	case OP_SPLICE_VALUES:         /* if splice_in_values hits eval_done, it needs to continue the splice after returning, so we get here */
-	  sc->value = splice_in_values(sc, sc->args);
-	  continue;
-
-	case OP_GC_PROTECT: case OP_BARRIER: case OP_NO_VALUES:
-	case OP_CATCH_ALL: case OP_CATCH: case OP_CATCH_1: case OP_CATCH_2:
-	  if (SHOW_EVAL_OPS) fprintf(stderr, "  flush %s\n", op_names[sc->cur_op]);
-	  continue;
-
-	case OP_GET_OUTPUT_STRING:      op_get_output_string(sc); /* from call-with-output-string|with-output-to-string; return the port string directly *//* fall through */
-	case OP_UNWIND_OUTPUT:          op_unwind_output(sc);                          continue;
-	case OP_UNWIND_INPUT:           op_unwind_input(sc);                           continue;
-	case OP_DYNAMIC_UNWIND:         dynamic_unwind(sc, sc->code, sc->args);        continue;
-	case OP_PROFILE_IN:             g_profile_in(sc, set_plist_2(sc, cadr(sc->code), sc->curlet)); continue;
-	case OP_DYNAMIC_UNWIND_PROFILE: g_profile_out(sc, set_plist_1(sc, sc->args));  continue;
-	case OP_DYNAMIC_WIND:           if (op_dynamic_wind(sc)) goto APPLY;           continue;
-	case OP_DEACTIVATE_GOTO:        call_exit_active(sc->args) = false;            continue; /* deactivate the exiter */
-
-	case OP_WITH_LET_S:             sc->value = fx_with_let_s(sc, sc->code); continue;
-	case OP_WITH_LET:               check_with_let(sc);
-	case OP_WITH_LET_UNCHECKED:     if (op_with_let_unchecked(sc)) goto EVAL;
-	case OP_WITH_LET1:              if (sc->value != sc->curlet) activate_with_let(sc, sc->value); goto BEGIN;
-
-	case OP_WITH_BAFFLE:            check_with_baffle(sc);
-	case OP_WITH_BAFFLE_UNCHECKED:  if (op_with_baffle_unchecked(sc)) continue; goto BEGIN;
-
-
-	case OP_READ_INTERNAL:             op_read_internal(sc); continue;
-	case OP_READ_DONE:                 op_read_done(sc);     continue;
-	case OP_LOAD_RETURN_IF_EOF:        if (op_load_return_if_eof(sc)) goto EVAL; return(sc->F);
-	case OP_LOAD_CLOSE_AND_POP_IF_EOF: if (op_load_close_and_pop_if_eof(sc)) goto EVAL; continue;
-
-	POP_READ_LIST:
-	  if (pop_read_list(sc)) goto READ_NEXT;
-
-	READ_LIST:
-	case OP_READ_LIST:        /* sc->args is sc->nil at first */
-	  sc->args = cons(sc, sc->value, sc->args);
-
-	READ_NEXT:
-	case OP_READ_NEXT:       /* this is 75% of the token calls, so expanding it saves lots of time */
-	  {
-	    int32_t c;
-	    s7_pointer pt = current_input_port(sc);
-	    c = port_read_white_space(pt)(sc, pt);
-
-	  READ_C:
-	    switch (c)
-	      {
-	      case '(':
-		c = port_read_white_space(pt)(sc, pt);  /* sc->tok = token(sc) */
-		switch (c)
-		  {
-		  case '(':  sc->tok = TOKEN_LEFT_PAREN;                break;
-		  case ')':  sc->value = sc->nil; goto READ_LIST;       /* was tok = TOKEN_RIGHT_PAREN */
-		  case '.':  sc->tok = read_dot(sc, pt);                break;
-		  case '\'': sc->tok = TOKEN_QUOTE;                     break;
-		  case ';':  sc->tok = port_read_semicolon(pt)(sc, pt); break;
-		  case '"':  sc->tok = TOKEN_DOUBLE_QUOTE;              break;
-		  case '`':  sc->tok = TOKEN_BACK_QUOTE;                break;
-		  case ',':  sc->tok = read_comma(sc, pt);              break;
-		  case '#':  sc->tok = read_sharp(sc, pt);              break;
-		  case '\0': case EOF: sc->tok = TOKEN_EOF;             break;
-
-		  default: /* read first element of list (ignore callgrind confusion -- this happens a lot) */
-		    c = read_start_list(sc, pt, c);
-		    goto READ_C;
-		  }
-		if (sc->tok == TOKEN_ATOM)
-		  {
-		    c = read_atom(sc, pt);
-		    goto READ_C;
-		  }
-		if (sc->tok == TOKEN_RIGHT_PAREN)
-		  {
-		    sc->value = sc->nil;
-		    goto READ_LIST;
-		  }
-		if (sc->tok == TOKEN_DOT)
-		  {
-		    do {c = inchar(pt);} while ((c != ')') && (c != EOF));
-		    read_error_nr(sc, "stray dot after '('?");      /* (car '( . )) */
-		  }
-		if (sc->tok == TOKEN_EOF)
-		  missing_close_paren_error_nr(sc);
-
-		push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
-		push_stack_no_let_no_code(sc, OP_READ_LIST, sc->nil);
-		/* check_stack_size(sc); */
-		sc->value = read_expression(sc);
-		if (stack_top_op(sc) == OP_READ_LIST) goto POP_READ_LIST;
-		continue;
-
-	      case ')':
-		sc->tok = TOKEN_RIGHT_PAREN;
-		break;
-
-	      case '.':
-		sc->tok = read_dot(sc, pt); /* dot or atom */
-		break;
-
-	      case '\'':
-		sc->tok = TOKEN_QUOTE;
-		/* might need check_stack_size(sc) here */
-		push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
-		sc->value = read_expression(sc);
-		continue;
-
-	      case ';':
-		sc->tok = port_read_semicolon(pt)(sc, pt);
-		break;
-
-	      case '"':
-		sc->tok = TOKEN_DOUBLE_QUOTE;
-		read_double_quote(sc);
-		goto READ_LIST;
-
-	      case '`':
-		sc->tok = TOKEN_BACK_QUOTE;
-		push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
-		sc->value = read_expression(sc);
-		if (stack_top_op(sc) == OP_READ_LIST) goto POP_READ_LIST;
-		continue;
-
-	      case ',':
-		sc->tok = read_comma(sc, pt); /* at_mark or comma */
-		push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
-		sc->value = read_expression(sc);
-		continue;
-
-	      case '#':
-		sc->tok = read_sharp(sc, pt);
-		break;
-
-	      case '\0':
-	      case EOF:
-		missing_close_paren_error_nr(sc);
-
-	      default:
-		sc->strbuf[0] = (unsigned char)c;
-		sc->value = port_read_name(pt)(sc, pt);
-		goto READ_LIST;
-	      }}
-
-	READ_TOK:
-	  switch (sc->tok)
-	    {
-	    case TOKEN_RIGHT_PAREN: 	      /* sc->args can't be null here */
-	      sc->value = proper_list_reverse_in_place(sc, sc->args);
-	      if ((is_expansion(car(sc->value))) &&
-		  (sc->is_expanding))
-		switch (op_expansion(sc))
-		  {
-		  case goto_begin: goto BEGIN;
-		  case goto_apply_lambda: goto APPLY_LAMBDA;
-		  default: break;
-		  }
-	      break;
-
-	    case TOKEN_EOF:          missing_close_paren_error_nr(sc);       /* can't happen, I believe */
-	    case TOKEN_ATOM:         sc->value = port_read_name(current_input_port(sc))(sc, current_input_port(sc)); goto READ_LIST;
-	    case TOKEN_SHARP_CONST:  if (read_sharp_const(sc)) goto READ_TOK; goto READ_LIST;
-	    case TOKEN_DOUBLE_QUOTE: read_double_quote(sc); goto READ_LIST;
-	    case TOKEN_DOT:          read_dot_and_expression(sc); break;
-	    default:                 read_tok_default(sc); break;
-	    }
-	  if (stack_top_op(sc) == OP_READ_LIST) goto POP_READ_LIST;
-	  continue;
-
-	case OP_READ_DOT:
-	  switch (op_read_dot(sc))
-	    {
-	    case goto_start: continue;
-	    case goto_pop_read_list: goto POP_READ_LIST;
-	    default: goto READ_TOK;
-	    }
-	case OP_READ_QUOTE:        if (op_read_quote(sc)) continue;        goto POP_READ_LIST;
-	case OP_READ_QUASIQUOTE:   if (op_read_quasiquote(sc)) continue;   goto POP_READ_LIST;
-	case OP_READ_UNQUOTE:      if (op_read_unquote(sc)) continue;      goto POP_READ_LIST;
-	case OP_READ_APPLY_VALUES: if (op_read_apply_values(sc)) continue; goto POP_READ_LIST;
-	case OP_READ_VECTOR:       if (op_read_vector(sc)) continue;       goto POP_READ_LIST;
-	case OP_READ_INT_VECTOR:   if (op_read_int_vector(sc)) continue;   goto POP_READ_LIST;
-	case OP_READ_FLOAT_VECTOR: if (op_read_float_vector(sc)) continue; goto POP_READ_LIST;
-	case OP_READ_BYTE_VECTOR:  if (op_read_byte_vector(sc)) continue;  goto POP_READ_LIST;
-
-	case OP_CLEAR_OPTS:
-	  break;
-
-	default:
-	  return(sc->F);
-	}
+        case OP_CASE_A_I_S_A: sc->value = fx_case_a_i_s_a(sc, sc->code); continue;
+#endif
+        case OP_CASE_A_E_S_A: sc->value = fx_case_a_e_s_a(sc, sc->code); continue;
+        case OP_CASE_A_G_S_A: sc->value = fx_case_a_g_s_a(sc, sc->code); continue;
+        case OP_CASE_A_S_G_A: sc->value = fx_case_a_s_g_a(sc, sc->code); continue;
+
+
+        case OP_ERROR_QUIT:
+          if (sc->stack_end <= sc->stack_start) stack_reset(sc);  /* sets stack_end to stack_start, then pushes op_eval_done, (can <= be <?) */
+          return(sc->F);
+
+        case OP_ERROR_HOOK_QUIT:
+          op_error_hook_quit(sc);
+
+        case OP_EVAL_DONE:
+          return(sc->F);
+
+        case OP_SPLICE_VALUES:         /* if splice_in_values hits eval_done, it needs to continue the splice after returning, so we get here */
+          sc->value = splice_in_values(sc, sc->args);
+          continue;
+
+        case OP_GC_PROTECT: case OP_BARRIER: case OP_NO_VALUES:
+        case OP_CATCH_ALL: case OP_CATCH: case OP_CATCH_1: case OP_CATCH_2:
+          if (SHOW_EVAL_OPS) fprintf(stderr, "  flush %s\n", op_names[sc->cur_op]);
+          continue;
+
+        case OP_GET_OUTPUT_STRING:      op_get_output_string(sc); /* from call-with-output-string|with-output-to-string; return the port string directly *//* fall through */
+        case OP_UNWIND_OUTPUT:          op_unwind_output(sc);                          continue;
+        case OP_UNWIND_INPUT:           op_unwind_input(sc);                           continue;
+        case OP_DYNAMIC_UNWIND:         dynamic_unwind(sc, sc->code, sc->args);        continue;
+        case OP_PROFILE_IN:             g_profile_in(sc, set_plist_2(sc, cadr(sc->code), sc->curlet)); continue;
+        case OP_DYNAMIC_UNWIND_PROFILE: g_profile_out(sc, set_plist_1(sc, sc->args));  continue;
+        case OP_DYNAMIC_WIND:           if (op_dynamic_wind(sc)) goto APPLY;           continue;
+        case OP_DEACTIVATE_GOTO:        call_exit_active(sc->args) = false;            continue; /* deactivate the exiter */
+
+        case OP_WITH_LET_S:             sc->value = fx_with_let_s(sc, sc->code); continue;
+        case OP_WITH_LET:               check_with_let(sc);
+        case OP_WITH_LET_UNCHECKED:     if (op_with_let_unchecked(sc)) goto EVAL;
+        case OP_WITH_LET1:              if (sc->value != sc->curlet) activate_with_let(sc, sc->value); goto BEGIN;
+
+        case OP_WITH_BAFFLE:            check_with_baffle(sc);
+        case OP_WITH_BAFFLE_UNCHECKED:  if (op_with_baffle_unchecked(sc)) continue; goto BEGIN;
+
+
+        case OP_READ_INTERNAL:             op_read_internal(sc); continue;
+        case OP_READ_DONE:                 op_read_done(sc);     continue;
+        case OP_LOAD_RETURN_IF_EOF:        if (op_load_return_if_eof(sc)) goto EVAL; return(sc->F);
+        case OP_LOAD_CLOSE_AND_POP_IF_EOF: if (op_load_close_and_pop_if_eof(sc)) goto EVAL; continue;
+
+        POP_READ_LIST:
+          if (pop_read_list(sc)) goto READ_NEXT;
+
+        READ_LIST:
+        case OP_READ_LIST:        /* sc->args is sc->nil at first */
+          sc->args = cons(sc, sc->value, sc->args);
+
+        READ_NEXT:
+        case OP_READ_NEXT:       /* this is 75% of the token calls, so expanding it saves lots of time */
+          {
+            int32_t c;
+            s7_pointer pt = current_input_port(sc);
+            c = port_read_white_space(pt)(sc, pt);
+
+          READ_C:
+            switch (c)
+              {
+              case '(':
+                c = port_read_white_space(pt)(sc, pt);  /* sc->tok = token(sc) */
+                switch (c)
+                  {
+                  case '(':  sc->tok = TOKEN_LEFT_PAREN;                break;
+                  case ')':  sc->value = sc->nil; goto READ_LIST;       /* was tok = TOKEN_RIGHT_PAREN */
+                  case '.':  sc->tok = read_dot(sc, pt);                break;
+                  case '\'': sc->tok = TOKEN_QUOTE;                     break;
+                  case ';':  sc->tok = port_read_semicolon(pt)(sc, pt); break;
+                  case '"':  sc->tok = TOKEN_DOUBLE_QUOTE;              break;
+                  case '`':  sc->tok = TOKEN_BACK_QUOTE;                break;
+                  case ',':  sc->tok = read_comma(sc, pt);              break;
+                  case '#':  sc->tok = read_sharp(sc, pt);              break;
+                  case '\0': case EOF: sc->tok = TOKEN_EOF;             break;
+
+                  default: /* read first element of list (ignore callgrind confusion -- this happens a lot) */
+                    c = read_start_list(sc, pt, c);
+                    goto READ_C;
+                  }
+                if (sc->tok == TOKEN_ATOM)
+                  {
+                    c = read_atom(sc, pt);
+                    goto READ_C;
+                  }
+                if (sc->tok == TOKEN_RIGHT_PAREN)
+                  {
+                    sc->value = sc->nil;
+                    goto READ_LIST;
+                  }
+                if (sc->tok == TOKEN_DOT)
+                  {
+                    do {c = inchar(pt);} while ((c != ')') && (c != EOF));
+                    read_error_nr(sc, "stray dot after '('?");      /* (car '( . )) */
+                  }
+                if (sc->tok == TOKEN_EOF)
+                  missing_close_paren_error_nr(sc);
+
+                push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
+                push_stack_no_let_no_code(sc, OP_READ_LIST, sc->nil);
+                /* check_stack_size(sc); */
+                sc->value = read_expression(sc);
+                if (stack_top_op(sc) == OP_READ_LIST) goto POP_READ_LIST;
+                continue;
+
+              case ')':
+                sc->tok = TOKEN_RIGHT_PAREN;
+                break;
+
+              case '.':
+                sc->tok = read_dot(sc, pt); /* dot or atom */
+                break;
+
+              case '\'':
+                sc->tok = TOKEN_QUOTE;
+                /* might need check_stack_size(sc) here */
+                push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
+                sc->value = read_expression(sc);
+                continue;
+
+              case ';':
+                sc->tok = port_read_semicolon(pt)(sc, pt);
+                break;
+
+              case '"':
+                sc->tok = TOKEN_DOUBLE_QUOTE;
+                read_double_quote(sc);
+                goto READ_LIST;
+
+              case '`':
+                sc->tok = TOKEN_BACK_QUOTE;
+                push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
+                sc->value = read_expression(sc);
+                if (stack_top_op(sc) == OP_READ_LIST) goto POP_READ_LIST;
+                continue;
+
+              case ',':
+                sc->tok = read_comma(sc, pt); /* at_mark or comma */
+                push_stack_no_let_no_code(sc, OP_READ_LIST, sc->args);
+                sc->value = read_expression(sc);
+                continue;
+
+              case '#':
+                sc->tok = read_sharp(sc, pt);
+                break;
+
+              case '\0':
+              case EOF:
+                missing_close_paren_error_nr(sc);
+
+              default:
+                sc->strbuf[0] = (unsigned char)c;
+                sc->value = port_read_name(pt)(sc, pt);
+                goto READ_LIST;
+              }}
+
+        READ_TOK:
+          switch (sc->tok)
+            {
+            case TOKEN_RIGHT_PAREN:               /* sc->args can't be null here */
+              sc->value = proper_list_reverse_in_place(sc, sc->args);
+              if ((is_expansion(car(sc->value))) &&
+                  (sc->is_expanding))
+                switch (op_expansion(sc))
+                  {
+                  case goto_begin: goto BEGIN;
+                  case goto_apply_lambda: goto APPLY_LAMBDA;
+                  default: break;
+                  }
+              break;
+
+            case TOKEN_EOF:          missing_close_paren_error_nr(sc);       /* can't happen, I believe */
+            case TOKEN_ATOM:         sc->value = port_read_name(current_input_port(sc))(sc, current_input_port(sc)); goto READ_LIST;
+            case TOKEN_SHARP_CONST:  if (read_sharp_const(sc)) goto READ_TOK; goto READ_LIST;
+            case TOKEN_DOUBLE_QUOTE: read_double_quote(sc); goto READ_LIST;
+            case TOKEN_DOT:          read_dot_and_expression(sc); break;
+            default:                 read_tok_default(sc); break;
+            }
+          if (stack_top_op(sc) == OP_READ_LIST) goto POP_READ_LIST;
+          continue;
+
+        case OP_READ_DOT:
+          switch (op_read_dot(sc))
+            {
+            case goto_start: continue;
+            case goto_pop_read_list: goto POP_READ_LIST;
+            default: goto READ_TOK;
+            }
+        case OP_READ_QUOTE:        if (op_read_quote(sc)) continue;        goto POP_READ_LIST;
+        case OP_READ_QUASIQUOTE:   if (op_read_quasiquote(sc)) continue;   goto POP_READ_LIST;
+        case OP_READ_UNQUOTE:      if (op_read_unquote(sc)) continue;      goto POP_READ_LIST;
+        case OP_READ_APPLY_VALUES: if (op_read_apply_values(sc)) continue; goto POP_READ_LIST;
+        case OP_READ_VECTOR:       if (op_read_vector(sc)) continue;       goto POP_READ_LIST;
+        case OP_READ_INT_VECTOR:   if (op_read_int_vector(sc)) continue;   goto POP_READ_LIST;
+        case OP_READ_FLOAT_VECTOR: if (op_read_float_vector(sc)) continue; goto POP_READ_LIST;
+        case OP_READ_BYTE_VECTOR:  if (op_read_byte_vector(sc)) continue;  goto POP_READ_LIST;
+
+        case OP_CLEAR_OPTS:
+          break;
+
+        default:
+          return(sc->F);
+        }
 
       /* this code is reached from OP_CLEAR_OPTS and many others where the optimization has turned out to be incorrect, OP_CLOSURE_SYM for example; search for break */
       if (!tree_is_cyclic(sc, sc->code))
-	clear_all_optimizations(sc, sc->code);
+        clear_all_optimizations(sc, sc->code);
     UNOPT:
       switch (trailers(sc))
-	{
-	case goto_top_no_pop:    goto TOP_NO_POP;
-	case goto_eval_args_top: goto EVAL_ARGS_TOP;
-	case goto_eval:          goto EVAL;
-	case goto_start:         continue; /* sc->value has been set, this is OP_SYMBOL|CONSTANT on the next pass */
-	default:
-	  if (S7_DEBUGGING) fprintf(stderr, "%s[%d]: unexpected switch default: %s\n", __func__, __LINE__, display(sc->code));
-	  break;
-	}}
+        {
+        case goto_top_no_pop:    goto TOP_NO_POP;
+        case goto_eval_args_top: goto EVAL_ARGS_TOP;
+        case goto_eval:          goto EVAL;
+        case goto_start:         continue; /* sc->value has been set, this is OP_SYMBOL|CONSTANT on the next pass */
+        default:
+          if (S7_DEBUGGING) fprintf(stderr, "%s[%d]: unexpected switch default: %s\n", __func__, __LINE__, display(sc->code));
+          break;
+        }}
   return(sc->F); /* this never happens (make the compiler happy) */
 }
 
@@ -93858,14 +93858,14 @@ static void mark_stack_holdees(s7_scheme *sc, s7_pointer p, s7_int top)
       s7_pointer heap0 = *(sc->heap);
       s7_pointer heap1 = (s7_pointer)(heap0 + sc->heap_size);
       for (s7_pointer *tp = (s7_pointer *)(stack_elements(p)), *tend = (s7_pointer *)(tp + top); (tp < tend); tp++)
-	{
-	  s7_pointer x = *tp++;
-	  if ((x >= heap0) && (x < heap1)) mark_holdee(p, x, NULL);
-	  x = *tp++;
-	  if ((x >= heap0) && (x < heap1)) mark_holdee(p, x, NULL);
-	  x = *tp++;
-	  if ((x >= heap0) && (x < heap1)) mark_holdee(p, x, NULL);
-	}}
+        {
+          s7_pointer x = *tp++;
+          if ((x >= heap0) && (x < heap1)) mark_holdee(p, x, NULL);
+          x = *tp++;
+          if ((x >= heap0) && (x < heap1)) mark_holdee(p, x, NULL);
+          x = *tp++;
+          if ((x >= heap0) && (x < heap1)) mark_holdee(p, x, NULL);
+        }}
 }
 
 static void save_holder_data(s7_scheme *sc, s7_pointer p)
@@ -93896,7 +93896,7 @@ static void save_holder_data(s7_scheme *sc, s7_pointer p)
     case T_VECTOR:
       if (is_subvector(p)) mark_holdee(p, subvector_vector(p), NULL);
       for (s7_int i = 0, len = vector_length(p); i < len; i++)
-	if (vector_element(p, i)) mark_holdee(p, vector_element(p, i), NULL);
+        if (vector_element(p, i)) mark_holdee(p, vector_element(p, i), NULL);
       break;
 
     case T_INT_VECTOR: case T_FLOAT_VECTOR: case T_BYTE_VECTOR:
@@ -93905,17 +93905,17 @@ static void save_holder_data(s7_scheme *sc, s7_pointer p)
 
     case T_LET:
       if (p != sc->rootlet) /* do rootlet later? */
-	{
-	  for (s7_pointer slot = let_slots(p); tis_slot(slot); slot = next_slot(slot)) mark_holdee(p, slot, NULL);
-	  if (has_dox_slot1(p)) mark_holdee(p, let_dox_slot1(p), NULL);
-	  if ((has_dox_slot2(p)) && (is_slot(let_dox_slot2(p)))) mark_holdee(p, let_dox_slot2(p), NULL);
-	}
+        {
+          for (s7_pointer slot = let_slots(p); tis_slot(slot); slot = next_slot(slot)) mark_holdee(p, slot, NULL);
+          if (has_dox_slot1(p)) mark_holdee(p, let_dox_slot1(p), NULL);
+          if ((has_dox_slot2(p)) && (is_slot(let_dox_slot2(p)))) mark_holdee(p, let_dox_slot2(p), NULL);
+        }
       break;
 
     case T_C_FUNCTION_STAR:
       if ((!c_func_has_simple_defaults(p)) && (c_function_call_args(p)))
-	for (s7_pointer arg = c_function_call_args(p); is_pair(arg); arg = cdr(arg))
-	  mark_holdee(p, car(arg), NULL);
+        for (s7_pointer arg = c_function_call_args(p); is_pair(arg); arg = cdr(arg))
+          mark_holdee(p, car(arg), NULL);
       break;
 
     case T_CLOSURE: case T_CLOSURE_STAR:
@@ -93930,28 +93930,28 @@ static void save_holder_data(s7_scheme *sc, s7_pointer p)
     case T_HASH_TABLE:
       mark_holdee(p, hash_table_procedures(p), NULL);
       if (is_pair(hash_table_procedures(p)))
-	{
-	  mark_holdee(p, hash_table_key_typer_unchecked(p), NULL);
-	  mark_holdee(p, hash_table_value_typer_unchecked(p), NULL);
-	}
+        {
+          mark_holdee(p, hash_table_key_typer_unchecked(p), NULL);
+          mark_holdee(p, hash_table_value_typer_unchecked(p), NULL);
+        }
       if (hash_table_entries(p) > 0)
-	{
-	  s7_int len = hash_table_size(p);
-	  hash_entry_t **entries = hash_table_elements(p);
-	  hash_entry_t **last = (hash_entry_t **)(entries + len);
-	  if ((is_weak_hash_table(p)) && (weak_hash_iters(p) == 0))
-	    while (entries < last)
-	      {
-		for (hash_entry_t *xp = *entries++; xp; xp = hash_entry_next(xp))
-		  mark_holdee(p, hash_entry_value(xp), NULL);
-	      }
-	  else
-	    while (entries < last)
-	      for (hash_entry_t *xp = *entries++; xp; xp = hash_entry_next(xp))
-		{
-		  mark_holdee(p, hash_entry_key(xp), NULL);
-		  mark_holdee(p, hash_entry_value(xp), NULL);
-		}}
+        {
+          s7_int len = hash_table_size(p);
+          hash_entry_t **entries = hash_table_elements(p);
+          hash_entry_t **last = (hash_entry_t **)(entries + len);
+          if ((is_weak_hash_table(p)) && (weak_hash_iters(p) == 0))
+            while (entries < last)
+              {
+                for (hash_entry_t *xp = *entries++; xp; xp = hash_entry_next(xp))
+                  mark_holdee(p, hash_entry_value(xp), NULL);
+              }
+          else
+            while (entries < last)
+              for (hash_entry_t *xp = *entries++; xp; xp = hash_entry_next(xp))
+                {
+                  mark_holdee(p, hash_entry_key(xp), NULL);
+                  mark_holdee(p, hash_entry_value(xp), NULL);
+                }}
       break;
 
     case T_CONTINUATION:
@@ -93984,8 +93984,8 @@ void s7_heap_analyze(s7_scheme *sc)
     if (tmps_top > sc->previous_free_heap_top) tmps_top = sc->previous_free_heap_top;
     while (tmps < tmps_top)
       {
-	s7_pointer p = *tmps++;
-	mark_holdee(NULL, p, "gc temp");
+        s7_pointer p = *tmps++;
+        mark_holdee(NULL, p, "gc temp");
       }}
 
   mark_holdee(NULL, sc->w, "sc->w");
@@ -94090,15 +94090,15 @@ void s7_heap_analyze(s7_scheme *sc)
     gc_list_t *gp = sc->opt1_funcs;
     for (s7_int i = 0; i < gp->loc; i++)
       {
-	s7_pointer s1 = T_Pair(gp->list[i]);
-	mark_holdee(NULL, opt1_any(s1), "opt1_funcs");
+        s7_pointer s1 = T_Pair(gp->list[i]);
+        mark_holdee(NULL, opt1_any(s1), "opt1_funcs");
       }}
 
   for (int32_t i = 1; i < NUM_SAFE_LISTS; i++)
     if ((is_pair(sc->safe_lists[i])) &&
-	(list_is_in_use(sc->safe_lists[i])))
+        (list_is_in_use(sc->safe_lists[i])))
       for (s7_pointer p = sc->safe_lists[i]; is_pair(p); p = cdr(p))
-	mark_holdee(NULL, car(p), "safe_lists");
+        mark_holdee(NULL, car(p), "safe_lists");
 
   for (s7_pointer p = sc->wrong_type_arg_info; is_pair(p); p = cdr(p)) mark_holdee(NULL, car(p), "wrong-type-arg");
   for (s7_pointer p = sc->sole_arg_wrong_type_info; is_pair(p); p = cdr(p)) mark_holdee(NULL, car(p), "simple wrong-type-arg");
@@ -94128,22 +94128,22 @@ void s7_heap_scan(s7_scheme *sc, int32_t typ)
     {
       s7_pointer obj = sc->heap[k];
       if (unchecked_type(obj) == typ)
-	{
-	  found_one = true;
-	  if (obj->holders == 0)
-	    fprintf(stderr, "%s found no holder (alloc: %s[%d])\n", display_truncated(obj), obj->alloc_func, obj->alloc_line);
-	  else
-	    if (!obj->holder)
-	      fprintf(stderr, "%s has built-in holder (holders: %d, alloc: %s[%d])\n", display_truncated(obj), obj->holders, obj->alloc_func, obj->alloc_line);
-	    else
-	      if (obj->root)
-		fprintf(stderr, "%s from %s alloc: %s[%d] (%d holder%s, alloc: %s[%d])\n",
-			display_truncated(obj), obj->root, obj->alloc_func, obj->alloc_line,
-			obj->holders, (obj->holders != 1) ? "s" : "", obj->holder->alloc_func, obj->holder->alloc_line);
-	      else fprintf(stderr, "%s (%s, alloc: %s[%d], holder%s: %d %p %s alloc: %s[%d])\n",
-			   display_truncated(obj), s7_type_names[unchecked_type(obj->holder)], obj->alloc_func, obj->alloc_line,
-			   (obj->holders != 1) ? "s" : "", obj->holders, obj->holder, display(obj->holder), obj->holder->alloc_func, obj->holder->alloc_line);
-	}}
+        {
+          found_one = true;
+          if (obj->holders == 0)
+            fprintf(stderr, "%s found no holder (alloc: %s[%d])\n", display_truncated(obj), obj->alloc_func, obj->alloc_line);
+          else
+            if (!obj->holder)
+              fprintf(stderr, "%s has built-in holder (holders: %d, alloc: %s[%d])\n", display_truncated(obj), obj->holders, obj->alloc_func, obj->alloc_line);
+            else
+              if (obj->root)
+                fprintf(stderr, "%s from %s alloc: %s[%d] (%d holder%s, alloc: %s[%d])\n",
+                        display_truncated(obj), obj->root, obj->alloc_func, obj->alloc_line,
+                        obj->holders, (obj->holders != 1) ? "s" : "", obj->holder->alloc_func, obj->holder->alloc_line);
+              else fprintf(stderr, "%s (%s, alloc: %s[%d], holder%s: %d %p %s alloc: %s[%d])\n",
+                           display_truncated(obj), s7_type_names[unchecked_type(obj->holder)], obj->alloc_func, obj->alloc_line,
+                           (obj->holders != 1) ? "s" : "", obj->holders, obj->holder, display(obj->holder), obj->holder->alloc_func, obj->holder->alloc_line);
+        }}
   if (!found_one)
     fprintf(stderr, "heap-scan: no %s found\n", s7_type_names[typ]);
 }
@@ -94231,21 +94231,21 @@ static s7_pointer g_is_op_stack(s7_scheme *sc, s7_pointer args)
 static noreturn void s7_starlet_wrong_type_error_nr(s7_scheme *sc, s7_pointer caller, s7_pointer arg, s7_pointer typ)
 {
   error_nr(sc, sc->wrong_type_arg_symbol,
-	   set_elist_5(sc, wrap_string(sc, "(set! (*s7* '~A) ~S): new value is ~A but should be ~A", 54),
-		       caller, arg, object_type_name(sc, arg), typ));
+           set_elist_5(sc, wrap_string(sc, "(set! (*s7* '~A) ~S): new value is ~A but should be ~A", 54),
+                       caller, arg, object_type_name(sc, arg), typ));
 }
 
 static noreturn void sl_stacktrace_wrong_type_error_nr(s7_scheme *sc, s7_pointer caller, s7_int num, s7_pointer arg, s7_pointer typ, s7_pointer val)
 {
   set_elist_7(sc, wrap_string(sc, "(set! (*s7* '~A) '~S): the ~:D list element ~S is ~A but should be ~A", 69),
-	      caller, val, wrap_integer(sc, num), arg, object_type_name(sc, arg), typ);
+              caller, val, wrap_integer(sc, num), arg, object_type_name(sc, arg), typ);
   error_nr(sc, sc->wrong_type_arg_symbol, sc->elist_7);
 }
 
 static noreturn void s7_starlet_out_of_range_error_nr(s7_scheme *sc, s7_pointer caller, s7_pointer arg, s7_pointer descr)
 {
   error_nr(sc, sc->out_of_range_symbol,
-	   set_elist_4(sc, wrap_string(sc, "(set! (*s7* '~A) ~S): new value is out of range (~A)", 52), caller, arg, descr));
+           set_elist_4(sc, wrap_string(sc, "(set! (*s7* '~A) ~S): new value is out of range (~A)", 52), caller, arg, descr));
 }
 
 static s7_int s7_starlet_length(void) {return(SL_NUM_FIELDS - 1);}
@@ -94295,21 +94295,21 @@ static void add_symbol_table(s7_scheme *sc, s7_pointer mu_let)
       s7_pointer x;
       s7_int k = 0;
       for (x = els[i]; is_not_null(x); x = cdr(x), k++)
-	{
-	  syms++;
-	  if (is_gensym(car(x))) gens++;
-	  if (is_keyword(car(x))) keys++;
-	}
+        {
+          syms++;
+          if (is_gensym(car(x))) gens++;
+          if (is_keyword(car(x))) keys++;
+        }
       if (k > mx_list) mx_list = k;
     }
   add_slot_unchecked_with_id(sc, mu_let, sc->symbol_table_symbol,
-			     s7_inlet(sc,
-			       s7_list(sc, 10,
-				     sc->size_symbol, make_integer(sc, SYMBOL_TABLE_SIZE),
-				     make_symbol(sc, "max-bin", 7), make_integer(sc, mx_list),
-				     make_symbol(sc, "symbols", 7), cons(sc, make_integer(sc, syms), make_integer(sc, syms - gens - keys)),
-				     make_symbol(sc, "gensyms", 7), make_integer(sc, gens),
-				     make_symbol(sc, "keys", 4),    make_integer(sc, keys))));
+                             s7_inlet(sc,
+                               s7_list(sc, 10,
+                                     sc->size_symbol, make_integer(sc, SYMBOL_TABLE_SIZE),
+                                     make_symbol(sc, "max-bin", 7), make_integer(sc, mx_list),
+                                     make_symbol(sc, "symbols", 7), cons(sc, make_integer(sc, syms), make_integer(sc, syms - gens - keys)),
+                                     make_symbol(sc, "gensyms", 7), make_integer(sc, gens),
+                                     make_symbol(sc, "keys", 4),    make_integer(sc, keys))));
 }
 
 static s7_pointer kmg(s7_scheme *sc, s7_int bytes)
@@ -94323,7 +94323,7 @@ static s7_pointer kmg(s7_scheme *sc, s7_int bytes)
       len = snprintf((char *)block_data(b), 128, "%.1fk", bytes / 1000.0);
     else
       if (bytes < 1000000000)
-	len = snprintf((char *)block_data(b), 128, "%.1fM", bytes / 1000000.0);
+        len = snprintf((char *)block_data(b), 128, "%.1fM", bytes / 1000000.0);
       else len = snprintf((char *)block_data(b), 128, "%.1fG", bytes / 1000000000.0);
   return(cons(sc, make_integer(sc, bytes), block_to_string(sc, b, len)));
 }
@@ -94342,25 +94342,25 @@ static void add_gc_list_sizes(s7_scheme *sc, s7_pointer mu_let)
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "gc-lists", 8),
    s7_inlet(sc,
      s7_list(sc, 6,
-	     make_symbol(sc, "active/total", 12), cons(sc, make_integer(sc, loc), make_integer(sc, len)),
-	     make_symbol(sc, "total-bytes", 11), kmg(sc, len * sizeof(s7_pointer)),
-	     make_symbol(sc, "lists", 5),
+             make_symbol(sc, "active/total", 12), cons(sc, make_integer(sc, loc), make_integer(sc, len)),
+             make_symbol(sc, "total-bytes", 11), kmg(sc, len * sizeof(s7_pointer)),
+             make_symbol(sc, "lists", 5),
        s7_inlet(sc,
          s7_list(sc, 28,
-	   sc->string_symbol,                    cons(sc, make_integer(sc, sc->strings->loc),             make_integer(sc, sc->strings->size)),
-	   sc->vector_symbol,                    cons(sc, make_integer(sc, sc->vectors->loc),             make_integer(sc, sc->vectors->size)),
-	   sc->hash_table_symbol,                cons(sc, make_integer(sc, sc->hash_tables->loc),         make_integer(sc, sc->hash_tables->size)),
-	   make_symbol(sc, "multivector", 11),   cons(sc, make_integer(sc, sc->multivectors->loc),        make_integer(sc, sc->multivectors->size)),
-	   make_symbol(sc, "input", 5),          cons(sc, make_integer(sc, sc->input_ports->loc),         make_integer(sc, sc->input_ports->size)),
-	   make_symbol(sc, "output", 6),         cons(sc, make_integer(sc, sc->output_ports->loc),        make_integer(sc, sc->output_ports->size)),
-	   make_symbol(sc, "input-string", 12),  cons(sc, make_integer(sc, sc->input_string_ports->loc),  make_integer(sc, sc->input_string_ports->size)),
-	   make_symbol(sc, "continuation", 12),  cons(sc, make_integer(sc, sc->continuations->loc),       make_integer(sc, sc->continuations->size)),
-	   make_symbol(sc, "c-object", 8),       cons(sc, make_integer(sc, sc->c_objects->loc),           make_integer(sc, sc->c_objects->size)),
-	   sc->gensym_symbol,                    cons(sc, make_integer(sc, sc->gensyms->loc),             make_integer(sc, sc->gensyms->size)),
-	   make_symbol(sc, "undefined", 9),      cons(sc, make_integer(sc, sc->undefineds->loc),          make_integer(sc, sc->undefineds->size)),
-	   make_symbol(sc, "weak-ref", 8),       cons(sc, make_integer(sc, sc->weak_refs->loc),           make_integer(sc, sc->weak_refs->size)),
-	   make_symbol(sc, "weak-hash-iter", 14),cons(sc, make_integer(sc, sc->weak_hash_iterators->loc), make_integer(sc, sc->weak_hash_iterators->size)),
-	   make_symbol(sc, "opt1-func", 9),      cons(sc, make_integer(sc, sc->opt1_funcs->loc),          make_integer(sc, sc->opt1_funcs->size)))))));
+           sc->string_symbol,                    cons(sc, make_integer(sc, sc->strings->loc),             make_integer(sc, sc->strings->size)),
+           sc->vector_symbol,                    cons(sc, make_integer(sc, sc->vectors->loc),             make_integer(sc, sc->vectors->size)),
+           sc->hash_table_symbol,                cons(sc, make_integer(sc, sc->hash_tables->loc),         make_integer(sc, sc->hash_tables->size)),
+           make_symbol(sc, "multivector", 11),   cons(sc, make_integer(sc, sc->multivectors->loc),        make_integer(sc, sc->multivectors->size)),
+           make_symbol(sc, "input", 5),          cons(sc, make_integer(sc, sc->input_ports->loc),         make_integer(sc, sc->input_ports->size)),
+           make_symbol(sc, "output", 6),         cons(sc, make_integer(sc, sc->output_ports->loc),        make_integer(sc, sc->output_ports->size)),
+           make_symbol(sc, "input-string", 12),  cons(sc, make_integer(sc, sc->input_string_ports->loc),  make_integer(sc, sc->input_string_ports->size)),
+           make_symbol(sc, "continuation", 12),  cons(sc, make_integer(sc, sc->continuations->loc),       make_integer(sc, sc->continuations->size)),
+           make_symbol(sc, "c-object", 8),       cons(sc, make_integer(sc, sc->c_objects->loc),           make_integer(sc, sc->c_objects->size)),
+           sc->gensym_symbol,                    cons(sc, make_integer(sc, sc->gensyms->loc),             make_integer(sc, sc->gensyms->size)),
+           make_symbol(sc, "undefined", 9),      cons(sc, make_integer(sc, sc->undefineds->loc),          make_integer(sc, sc->undefineds->size)),
+           make_symbol(sc, "weak-ref", 8),       cons(sc, make_integer(sc, sc->weak_refs->loc),           make_integer(sc, sc->weak_refs->size)),
+           make_symbol(sc, "weak-hash-iter", 14),cons(sc, make_integer(sc, sc->weak_hash_iterators->loc), make_integer(sc, sc->weak_hash_iterators->size)),
+           make_symbol(sc, "opt1-func", 9),      cons(sc, make_integer(sc, sc->opt1_funcs->loc),          make_integer(sc, sc->opt1_funcs->size)))))));
 }
 
 /* handling all *s7* fields via fallbacks lets us use direct field accesses in the rest of s7, and avoids
@@ -94402,17 +94402,17 @@ static s7_pointer memory_usage(s7_scheme *sc)
 
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "rootlet-size", 12), make_integer(sc, let_length(sc, sc->rootlet)));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "heap-size", 9),
-			     cons(sc, make_integer(sc, sc->heap_size), kmg(sc, sc->heap_size * (sizeof(s7_cell) + 2 * sizeof(s7_pointer)))));
+                             cons(sc, make_integer(sc, sc->heap_size), kmg(sc, sc->heap_size * (sizeof(s7_cell) + 2 * sizeof(s7_pointer)))));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "cell-size", 9), make_integer(sc, sizeof(s7_cell)));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "gc-total-freed", 14), make_integer(sc, sc->gc_total_freed));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "gc-total-time", 13), make_real(sc, (double)(sc->gc_total_time) / ticks_per_second()));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "gc-calls", 8), make_integer(sc, sc->gc_calls));
 
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "small_ints", 10),
-			     cons(sc, make_integer(sc, NUM_SMALL_INTS), kmg(sc, NUM_SMALL_INTS * (sizeof(s7_pointer) + sizeof(s7_cell)))));
+                             cons(sc, make_integer(sc, NUM_SMALL_INTS), kmg(sc, NUM_SMALL_INTS * (sizeof(s7_pointer) + sizeof(s7_cell)))));
 
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "permanent-cells", 15),
-			     cons(sc, make_integer(sc, sc->semipermanent_cells), kmg(sc, sc->semipermanent_cells * sizeof(s7_cell))));
+                             cons(sc, make_integer(sc, sc->semipermanent_cells), kmg(sc, sc->semipermanent_cells * sizeof(s7_cell))));
   i = 0;
   for (gc_obj_t *g = sc->semipermanent_objects; g; i++, g = (gc_obj_t *)(g->nxt));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "permanent_objects", 17), make_integer(sc, i));
@@ -94425,18 +94425,18 @@ static s7_pointer memory_usage(s7_scheme *sc)
     s7_int live = 0, in_use = 0, line_used = 0;
     for (i = 1; i < NUM_SAFE_LISTS; i++)
       if (is_pair(sc->safe_lists[i]))
-	{
-	  live++;
-	  if (list_is_in_use(sc->safe_lists[i])) {in_use++; line_used = i;}
-	}
+        {
+          live++;
+          if (list_is_in_use(sc->safe_lists[i])) {in_use++; line_used = i;}
+        }
     sc->w = sc->nil;
 #if S7_DEBUGGING
     for (i = NUM_SAFE_LISTS - 1; i > 0; i--) /* omit safe_lists[0]=() since it is never used */
       sc->w = cons(sc, make_integer(sc, sc->safe_list_uses[i]), sc->w);
 #endif
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "safe-lists", 10),
-			       (in_use == 0) ? list_3(sc, small_int(live), int_zero, sc->w) :
-			                       list_4(sc, small_int(live), small_int(in_use), small_int(line_used), sc->w));
+                               (in_use == 0) ? list_3(sc, small_int(live), int_zero, sc->w) :
+                                               list_4(sc, small_int(live), small_int(in_use), small_int(line_used), sc->w));
 #if S7_DEBUGGING
     sc->w = sc->unused;
 #endif
@@ -94451,26 +94451,26 @@ static s7_pointer memory_usage(s7_scheme *sc)
     {
       if (i > 0) in_use += ts[i];
       if (ts[i] > 0) /* was 50, 26-Sep-23 */
-	{
-	  /* can't use bare type name here ("let" is a syntactic symbol) */
-	  const char *tname = (i == 0) ? "free" : type_name_from_type(i, NO_ARTICLE);
-	  s7_int len = safe_strlen(tname);
-	  uint8_t name[32]; /* not 16 -- gmp overflows this buffer with "big-complex-number", len=18 */
-	  memcpy((void *)name, (const void *)tname, len);
-	  name[len] = (uint8_t)'\0';
-	  name[0] = (uint8_t)toupper((int)name[0]);
-	  sc->w = cons_unchecked(sc, make_integer(sc, ts[i]), cons(sc, make_symbol(sc, (const char *)name, len), sc->w));
-	}}
+        {
+          /* can't use bare type name here ("let" is a syntactic symbol) */
+          const char *tname = (i == 0) ? "free" : type_name_from_type(i, NO_ARTICLE);
+          s7_int len = safe_strlen(tname);
+          uint8_t name[32]; /* not 16 -- gmp overflows this buffer with "big-complex-number", len=18 */
+          memcpy((void *)name, (const void *)tname, len);
+          name[len] = (uint8_t)'\0';
+          name[0] = (uint8_t)toupper((int)name[0]);
+          sc->w = cons_unchecked(sc, make_integer(sc, ts[i]), cons(sc, make_symbol(sc, (const char *)name, len), sc->w));
+        }}
   if (is_pair(sc->w))
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "heap-by-type", 12), s7_inlet(sc, proper_list_reverse_in_place(sc, sc->w)));
   sc->w = sc->unused;
   /* same for semipermanent cells requires traversing saved_pointers and the alloc and big_alloc blocks up to alloc_k, or keeping explicit counts */
 
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "cells-in-use/free", 17),
-			     cons(sc, make_integer(sc, in_use), make_integer(sc, sc->free_heap_top - sc->free_heap)));
+                             cons(sc, make_integer(sc, in_use), make_integer(sc, sc->free_heap_top - sc->free_heap)));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "gc-protected-objects", 20),
-			     cons(sc, make_integer(sc, sc->protected_objects_size - sc->protected_objects_free_list_loc),
-				  make_integer(sc, sc->protected_objects_size)));
+                             cons(sc, make_integer(sc, sc->protected_objects_size - sc->protected_objects_free_list_loc),
+                                  make_integer(sc, sc->protected_objects_size)));
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "setters", 7), make_integer(sc, sc->protected_setters_loc));
 
   add_symbol_table(sc, mu_let);
@@ -94481,7 +94481,7 @@ static s7_pointer memory_usage(s7_scheme *sc)
   add_slot_unchecked_with_id(sc, mu_let, sc->autoload_symbol, make_integer(sc, len));
 
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "circle_info", 11),
-			     make_integer(sc, sc->circle_info->size * (sizeof(s7_pointer) + sizeof(int32_t) + sizeof(bool))));
+                             make_integer(sc, sc->circle_info->size * (sizeof(s7_pointer) + sizeof(int32_t) + sizeof(bool))));
 
   add_gc_list_sizes(sc, mu_let);
 
@@ -94496,28 +94496,28 @@ static s7_pointer memory_usage(s7_scheme *sc)
     s7_int vlen = 0, vs = 0, flen = 0, fvs = 0, ilen = 0, ivs = 0, blen = 0, bvs = 0;
     for (k = 0, gp = sc->vectors; k < 2; k++, gp = sc->multivectors)
       for (i = 0; i < gp->loc; i++)
-	{
-	  s7_pointer v = gp->list[i];
-	  if (is_float_vector(v))
-	    {fvs++; flen += vector_length(v);}
-	  else
-	    if (is_int_vector(v))
-	      {ivs++; ilen += vector_length(v);}
-	    else
-	      if (is_byte_vector(v))
-		{bvs++; blen += vector_length(v);}
-	      else {vs++; vlen += vector_length(v);}
-	}
+        {
+          s7_pointer v = gp->list[i];
+          if (is_float_vector(v))
+            {fvs++; flen += vector_length(v);}
+          else
+            if (is_int_vector(v))
+              {ivs++; ilen += vector_length(v);}
+            else
+              if (is_byte_vector(v))
+                {bvs++; blen += vector_length(v);}
+              else {vs++; vlen += vector_length(v);}
+        }
     all_len += blen + ilen * sizeof(s7_int) + flen * sizeof(s7_double) + vlen * sizeof(s7_pointer);
     add_slot_unchecked_with_id(sc, mu_let,
-			       make_symbol(sc, "vectors", 7),
-			       s7_inlet(sc,
-			         s7_list(sc, 10,
-				   make_symbol(sc, "total", 5),  make_integer(sc, sc->vectors->loc + sc->multivectors->loc),
-				   make_symbol(sc, "normal", 6), cons(sc, make_integer(sc, vs), make_integer(sc, vlen)),
-				   make_symbol(sc, "float", 5),  cons(sc, make_integer(sc, fvs), make_integer(sc, flen)),
-				   make_symbol(sc, "int", 3),    cons(sc, make_integer(sc, ivs), make_integer(sc, ilen)),
-				   make_symbol(sc, "byte", 4),   cons(sc, make_integer(sc, bvs), make_integer(sc, blen)))));
+                               make_symbol(sc, "vectors", 7),
+                               s7_inlet(sc,
+                                 s7_list(sc, 10,
+                                   make_symbol(sc, "total", 5),  make_integer(sc, sc->vectors->loc + sc->multivectors->loc),
+                                   make_symbol(sc, "normal", 6), cons(sc, make_integer(sc, vs), make_integer(sc, vlen)),
+                                   make_symbol(sc, "float", 5),  cons(sc, make_integer(sc, fvs), make_integer(sc, flen)),
+                                   make_symbol(sc, "int", 3),    cons(sc, make_integer(sc, ivs), make_integer(sc, ilen)),
+                                   make_symbol(sc, "byte", 4),   cons(sc, make_integer(sc, bvs), make_integer(sc, blen)))));
   }
   /* hash-tables */
   {
@@ -94530,11 +94530,11 @@ static s7_pointer memory_usage(s7_scheme *sc)
     }
     all_len += all_len;
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "hash-tables", 11),
-			       cons(sc, make_integer(sc, sc->hash_tables->loc), make_integer(sc, hlen)));
+                               cons(sc, make_integer(sc, sc->hash_tables->loc), make_integer(sc, hlen)));
   }
   /* ports */
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "input-port-stack", 16),
-			     cons(sc, make_integer(sc, sc->input_port_stack_loc), make_integer(sc, sc->input_port_stack_size)));
+                             cons(sc, make_integer(sc, sc->input_port_stack_loc), make_integer(sc, sc->input_port_stack_size)));
   gp = sc->input_ports;
   for (i = 0, len = 0; i < gp->loc; i++)
     {
@@ -94542,7 +94542,7 @@ static s7_pointer memory_usage(s7_scheme *sc)
       if (port_data(v)) len += port_data_size(v);
     }
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "input-ports", 11),
-			     cons(sc, make_integer(sc, sc->input_ports->loc), make_integer(sc, len)));
+                             cons(sc, make_integer(sc, sc->input_ports->loc), make_integer(sc, len)));
 
   gp = sc->input_string_ports;
   for (i = 0, len = 0; i < gp->loc; i++)
@@ -94551,7 +94551,7 @@ static s7_pointer memory_usage(s7_scheme *sc)
       if (port_data(v)) len += port_data_size(v);
     }
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "input-string-ports", 18),
-			     cons(sc, make_integer(sc, sc->input_string_ports->loc), make_integer(sc, len)));
+                             cons(sc, make_integer(sc, sc->input_string_ports->loc), make_integer(sc, len)));
 
   gp = sc->output_ports;
   for (i = 0, len = 0; i < gp->loc; i++)
@@ -94560,7 +94560,7 @@ static s7_pointer memory_usage(s7_scheme *sc)
       if (port_data(v)) len += port_data_size(v);
     }
   add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "output-ports", 12),
-			     cons(sc, make_integer(sc, sc->output_ports->loc), make_integer(sc, len)));
+                             cons(sc, make_integer(sc, sc->output_ports->loc), make_integer(sc, len)));
 
   i = 0;
   for (s7_pointer p = sc->format_ports; p; i++, p = (s7_pointer)port_next(p));
@@ -94573,21 +94573,21 @@ static s7_pointer memory_usage(s7_scheme *sc)
       len += continuation_stack_size(gp->list[i]);
   if (len > 0)
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "continuations", 13),
-			       cons(sc, make_integer(sc, sc->continuations->loc), make_integer(sc, len * sizeof(s7_pointer))));
+                               cons(sc, make_integer(sc, sc->continuations->loc), make_integer(sc, len * sizeof(s7_pointer))));
   /* c-objects */
   if (sc->c_objects->loc > 0)
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "c-objects", 9), make_integer(sc, sc->c_objects->loc));
   if (sc->num_c_object_types > 0)
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "c-types", 7),
-			       cons(sc, make_integer(sc, sc->num_c_object_types),
-				    make_integer(sc, (sc->c_object_types_size * sizeof(c_object_t *)) + (sc->num_c_object_types * sizeof(c_object_t)))));
-				    /* we're ignoring c_type->scheme_name: make_permanent_string(sc, name) */
+                               cons(sc, make_integer(sc, sc->num_c_object_types),
+                                    make_integer(sc, (sc->c_object_types_size * sizeof(c_object_t *)) + (sc->num_c_object_types * sizeof(c_object_t)))));
+                                    /* we're ignoring c_type->scheme_name: make_permanent_string(sc, name) */
 #if WITH_GMP
   add_slot_unchecked_with_id(sc, mu_let,
-			     make_symbol(sc, "bignums", 7),
-			     s7_list(sc, 5, make_integer(sc, sc->big_integers->loc), make_integer(sc, sc->big_ratios->loc),
-				     make_integer(sc, sc->big_reals->loc), make_integer(sc, sc->big_complexes->loc),
-				     make_integer(sc, sc->big_random_states->loc)));
+                             make_symbol(sc, "bignums", 7),
+                             s7_list(sc, 5, make_integer(sc, sc->big_integers->loc), make_integer(sc, sc->big_ratios->loc),
+                                     make_integer(sc, sc->big_reals->loc), make_integer(sc, sc->big_complexes->loc),
+                                     make_integer(sc, sc->big_random_states->loc)));
 #endif
   /* free-lists (mallocate) */
   {
@@ -94597,11 +94597,11 @@ static s7_pointer memory_usage(s7_scheme *sc)
 #endif
     for (i = 0, len = 0, sc->w = sc->nil; i < TOP_BLOCK_LIST; i++)
       {
-	for (b = sc->block_lists[i], k = 0; b; b = block_next(b), k++);
-	sc->w = cons(sc, make_integer(sc, k), sc->w);
-	len += ((sizeof(block_t) + (1LL << i)) * k);
+        for (b = sc->block_lists[i], k = 0; b; b = block_next(b), k++);
+        sc->w = cons(sc, make_integer(sc, k), sc->w);
+        len += ((sizeof(block_t) + (1LL << i)) * k);
 #if S7_DEBUGGING
-	num_blocks += k;
+        num_blocks += k;
 #endif
       }
     for (b = sc->block_lists[TOP_BLOCK_LIST], k = 0; b; b = block_next(b), k++)
@@ -94610,17 +94610,17 @@ static s7_pointer memory_usage(s7_scheme *sc)
 #if S7_DEBUGGING
     num_blocks += k;
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "blocks-allocated", 16),
-			       cons(sc, make_integer(sc, num_blocks), make_integer(sc, sc->blocks_allocated)));
+                               cons(sc, make_integer(sc, num_blocks), make_integer(sc, sc->blocks_allocated)));
 #endif
     add_slot_unchecked_with_id(sc, mu_let, make_symbol(sc, "free-lists", 10),
-			       s7_inlet(sc, list_2(sc, cons(sc, make_symbol(sc, "bytes", 5), kmg(sc, len)),
-						   cons(sc, make_symbol(sc, "bins", 4), proper_list_reverse_in_place(sc, sc->w)))));
+                               s7_inlet(sc, list_2(sc, cons(sc, make_symbol(sc, "bytes", 5), kmg(sc, len)),
+                                                   cons(sc, make_symbol(sc, "bins", 4), proper_list_reverse_in_place(sc, sc->w)))));
     sc->w = sc->unused;
     add_slot_unchecked_with_id(sc, mu_let,
-			       make_symbol(sc, "approximate-s7-size", 19),
-			       kmg(sc, ((sc->semipermanent_cells + NUM_SMALL_INTS + sc->heap_size) * (sizeof(s7_pointer) + sizeof(s7_cell))) +
-				   ((2 * sc->heap_size + SYMBOL_TABLE_SIZE + sc->stack_size) * sizeof(s7_pointer)) +
-				   len + all_len));
+                               make_symbol(sc, "approximate-s7-size", 19),
+                               kmg(sc, ((sc->semipermanent_cells + NUM_SMALL_INTS + sc->heap_size) * (sizeof(s7_pointer) + sizeof(s7_cell))) +
+                                   ((2 * sc->heap_size + SYMBOL_TABLE_SIZE + sc->stack_size) * sizeof(s7_pointer)) +
+                                   len + all_len));
   }
 
   s7_gc_unprotect_at(sc, gc_loc);
@@ -94674,11 +94674,11 @@ static s7_pointer sl_active_catches(s7_scheme *sc)
     switch (stack_op(sc->stack, i))
       {
       case OP_CATCH_ALL:
-	lst = cons(sc, sc->T, lst);
-	break;
+        lst = cons(sc, sc->T, lst);
+        break;
       case OP_CATCH_2: case OP_CATCH_1: case OP_CATCH:
-	lst = cons(sc, catch_tag(stack_code(sc->stack, i)), lst);
-	break;
+        lst = cons(sc, catch_tag(stack_code(sc->stack, i)), lst);
+        break;
       }
   return(reverse_in_place_unchecked(sc, sc->nil, lst));
 }
@@ -94785,9 +94785,9 @@ s7_pointer s7_starlet_ref(s7_scheme *sc, s7_pointer sym) /* s7.h, not used here
   if (is_symbol(sym))
     {
       if (is_keyword(sym))
-	sym = keyword_symbol(sym);
+        sym = keyword_symbol(sym);
       if (s7_starlet_symbol(sym) != SL_NO_FIELD)
-	return(s7_starlet(sc, s7_starlet_symbol(sym)));
+        return(s7_starlet(sc, s7_starlet_symbol(sym)));
     }
   return(sc->undefined);
 }
@@ -94958,10 +94958,10 @@ static s7_pointer sl_set_gc_info(s7_scheme *sc, s7_pointer sym, s7_pointer val)
     }
   else
     if ((is_pair(val)) && (s7_is_integer(car(val))) &&
-	(is_pair(cdr(val))) && (s7_is_integer(cadr(val)))) /* caddr is ticks_per_second which can't sensibly be set */
+        (is_pair(cdr(val))) && (s7_is_integer(cadr(val)))) /* caddr is ticks_per_second which can't sensibly be set */
       {
-	sc->gc_total_time = s7_integer(car(val));
-	sc->gc_calls = s7_integer(cadr(val));
+        sc->gc_total_time = s7_integer(car(val));
+        sc->gc_calls = s7_integer(cadr(val));
       }
     else s7_starlet_wrong_type_error_nr(sc, sym, val, wrap_string(sc, "#f or a list of two or three integers (the third is ignored)", 60));
   return(sc->F);
@@ -94976,11 +94976,11 @@ static s7_pointer sl_set_profile(s7_scheme *sc, s7_pointer sym, s7_pointer val)
   if (sc->profile > 0)
     {
       if (!is_a_feature(make_symbol(sc, "profile.scm", 11), s7_symbol_value(sc, sc->features_symbol)))
-	s7_load(sc, "profile.scm");
+        s7_load(sc, "profile.scm");
       if (!sc->profile_data)
-	make_profile_info(sc);
+        make_profile_info(sc);
       if (!sc->profile_out)
-	sc->profile_out = s7_make_function(sc, "profile-out", g_profile_out, 2, 0, false, NULL);
+        sc->profile_out = s7_make_function(sc, "profile-out", g_profile_out, 2, 0, false, NULL);
     }
   return(val);
 }
@@ -95126,7 +95126,7 @@ static s7_pointer s7_starlet_set_1(s7_scheme *sc, s7_pointer sym, s7_pointer val
     case SL_HEAP_SIZE:
       iv = s7_integer_clamped_if_gmp(sc, sl_integer_geq_0(sc, sym, val));
       if (iv > sc->heap_size)
-	resize_heap_to(sc, iv);
+        resize_heap_to(sc, iv);
       return(val);
 
     case SL_HISTORY:               /* (set! (*s7* 'history) val) */
@@ -95160,7 +95160,7 @@ static s7_pointer s7_starlet_set_1(s7_scheme *sc, s7_pointer sym, s7_pointer val
     case SL_MAX_STACK_SIZE:
       iv = s7_integer_clamped_if_gmp(sc, sl_integer_geq_0(sc, sym, val));
       if (iv < INITIAL_STACK_SIZE)
-	s7_starlet_out_of_range_error_nr(sc, sym, val, wrap_string(sc, "it should be greater than the initial stack size", 48));
+        s7_starlet_out_of_range_error_nr(sc, sym, val, wrap_string(sc, "it should be greater than the initial stack size", 48));
       sc->max_stack_size = (uint32_t)iv;
       return(val);
 
@@ -95207,9 +95207,9 @@ static s7_pointer s7_starlet_set_1(s7_scheme *sc, s7_pointer sym, s7_pointer val
 
     case SL_SAFETY:
       if (!s7_is_integer(val))
-	s7_starlet_wrong_type_error_nr(sc, sym, val, sc->type_names[T_INTEGER]);
+        s7_starlet_wrong_type_error_nr(sc, sym, val, sc->type_names[T_INTEGER]);
       if ((s7_integer_clamped_if_gmp(sc, val) > 2) || (s7_integer_clamped_if_gmp(sc, val) < -1))
-	s7_starlet_out_of_range_error_nr(sc, sym, val, wrap_string(sc, "it should be between -1 (no safety) and 2 (max safety)", 54));
+        s7_starlet_out_of_range_error_nr(sc, sym, val, wrap_string(sc, "it should be between -1 (no safety) and 2 (max safety)", 54));
       sc->safety = s7_integer_clamped_if_gmp(sc, val);
       return(val);
 
@@ -95236,7 +95236,7 @@ static s7_pointer s7_starlet_set_1(s7_scheme *sc, s7_pointer sym, s7_pointer val
 
     default:
       error_nr(sc, sc->out_of_range_symbol,
-	       set_elist_2(sc, wrap_string(sc, "can't set (*s7* '~S); no such field in *s7*", 43), sym));
+               set_elist_2(sc, wrap_string(sc, "can't set (*s7* '~S); no such field in *s7*", 43), sym));
     }
   return(sc->undefined);
 }
@@ -95246,9 +95246,9 @@ s7_pointer s7_starlet_set(s7_scheme *sc, s7_pointer sym, s7_pointer new_value)
   if (is_symbol(sym))
     {
       if (is_keyword(sym))
-	sym = keyword_symbol(sym);
+        sym = keyword_symbol(sym);
       if (s7_starlet_symbol(sym) != SL_NO_FIELD)
-	return(s7_starlet_set_1(sc, sym, new_value));
+        return(s7_starlet_set_1(sc, sym, new_value));
     }
   return(sc->undefined);
 }
@@ -95334,10 +95334,10 @@ static bool is_decodable(s7_scheme *sc, const s7_pointer p)
   for (i = 0; i < SYMBOL_TABLE_SIZE; i++)
     for (s7_pointer x = vector_element(sc->symbol_table, i); is_not_null(x); x = cdr(x))
       {
-	s7_pointer sym = car(x);
-	if ((sym == p) ||
-	    ((is_global(sym)) && (is_slot(global_slot(sym))) && (p == global_value(sym))))
-	  return(true);
+        s7_pointer sym = car(x);
+        if ((sym == p) ||
+            ((is_global(sym)) && (is_slot(global_slot(sym))) && (p == global_value(sym))))
+          return(true);
       }
 
   for (i = 0; i < NUM_CHARS; i++) if (p == chars[i]) return(true);
@@ -95371,64 +95371,64 @@ const char *s7_decode_bt(s7_scheme *sc)
       bt = (uint8_t *)block_data(bt_block);
       bytes = fread(bt, sizeof(uint8_t), size, fp);
       if (bytes != (size_t)size)
-	{
-	  fclose(fp);
-	  liberate(sc, bt_block);
-	  return(" oops ");
-	}
+        {
+          fclose(fp);
+          liberate(sc, bt_block);
+          return(" oops ");
+        }
       bt[size] = '\0';
       fclose(fp);
 
       for (int64_t i = 0; i < size; i++)
-	{
-	  fputc(bt[i], stdout);
-	  if ((bt[i] == '"') && ((i == 0) || (bt[i - 1] != '\\')))
-	    in_quotes = (!in_quotes);
-	  else
-	    if ((!in_quotes) && (i < size - 8) &&
-		((bt[i] == '=') &&
-		 (((bt[i + 1] == '0') && (bt[i + 2] == 'x')) ||
-		  ((bt[i + 1] == ' ') && (bt[i + 2] == '0') && (bt[i + 3] == 'x')))))
-	      {
-		void *vp;
-		int32_t vals = sscanf((const char *)(bt + i + 1), "%p", &vp);
-		if ((vp) && (vals == 1))
-		  {
-		    int32_t k;
-		    for (k = i + ((bt[i + 2] == 'x') ? 3 : 4); (k < size) && (is_digit(bt[k], 16)); k++);
-		    if ((bt[k] != ' ') || (bt[k + 1] != '"'))
-		      {
-			if (vp == (void *)sc)
-			  {
-			    if (bt[i + 1] == ' ') fputc(' ', stdout);
-			    fprintf(stdout, "%s[s7]%s", bold_text, unbold_text);
-			    i = k - 1;
-			  }
-			else
-			  {
-			    s7_pointer p = (s7_pointer)vp;
-			    const char *dname = decoded_name(sc, p);
-			    if (dname)
-			      {
-				if (bt[i + 1] == ' ') fputc(' ', stdout);
-				fprintf(stdout, "%s[%s]%s", bold_text, dname, unbold_text);
-			      }
-			    if ((dname) || (is_decodable(sc, p)))
-			      {
-				if (bt[i + 1] == ' ') fputc(' ', stdout);
-				i = k - 1;
-				if (s7_is_valid(sc, p))
-				  {
-				    s7_pointer strp = object_to_string_truncated(sc, p);
-				    if (dname) fprintf(stdout, " ");
-				    fprintf(stdout, "%s%s%s", bold_text, string_value(strp), unbold_text);
-				    if ((is_pair(p)) &&
-					(has_location(p)))
-				      {
-					uint32_t line = pair_line_number(p), file = pair_file_number(p);
-					if (line > 0)
-					  fprintf(stdout, " %s(%s[%u])%s", bold_text, string_value(sc->file_names[file]), line, unbold_text);
-				      }}}}}}}}
+        {
+          fputc(bt[i], stdout);
+          if ((bt[i] == '"') && ((i == 0) || (bt[i - 1] != '\\')))
+            in_quotes = (!in_quotes);
+          else
+            if ((!in_quotes) && (i < size - 8) &&
+                ((bt[i] == '=') &&
+                 (((bt[i + 1] == '0') && (bt[i + 2] == 'x')) ||
+                  ((bt[i + 1] == ' ') && (bt[i + 2] == '0') && (bt[i + 3] == 'x')))))
+              {
+                void *vp;
+                int32_t vals = sscanf((const char *)(bt + i + 1), "%p", &vp);
+                if ((vp) && (vals == 1))
+                  {
+                    int32_t k;
+                    for (k = i + ((bt[i + 2] == 'x') ? 3 : 4); (k < size) && (is_digit(bt[k], 16)); k++);
+                    if ((bt[k] != ' ') || (bt[k + 1] != '"'))
+                      {
+                        if (vp == (void *)sc)
+                          {
+                            if (bt[i + 1] == ' ') fputc(' ', stdout);
+                            fprintf(stdout, "%s[s7]%s", bold_text, unbold_text);
+                            i = k - 1;
+                          }
+                        else
+                          {
+                            s7_pointer p = (s7_pointer)vp;
+                            const char *dname = decoded_name(sc, p);
+                            if (dname)
+                              {
+                                if (bt[i + 1] == ' ') fputc(' ', stdout);
+                                fprintf(stdout, "%s[%s]%s", bold_text, dname, unbold_text);
+                              }
+                            if ((dname) || (is_decodable(sc, p)))
+                              {
+                                if (bt[i + 1] == ' ') fputc(' ', stdout);
+                                i = k - 1;
+                                if (s7_is_valid(sc, p))
+                                  {
+                                    s7_pointer strp = object_to_string_truncated(sc, p);
+                                    if (dname) fprintf(stdout, " ");
+                                    fprintf(stdout, "%s%s%s", bold_text, string_value(strp), unbold_text);
+                                    if ((is_pair(p)) &&
+                                        (has_location(p)))
+                                      {
+                                        uint32_t line = pair_line_number(p), file = pair_file_number(p);
+                                        if (line > 0)
+                                          fprintf(stdout, " %s(%s[%u])%s", bold_text, string_value(sc->file_names[file]), line, unbold_text);
+                                      }}}}}}}}
       liberate(sc, bt_block);
       sc->stop_at_error = old_stop;
     }
@@ -96410,9 +96410,9 @@ static void init_setters(s7_scheme *sc)
 #if (WITH_PURE_S7)
   /* we need to be able at least to set (current-output-port) to #f */
   c_function_set_setter(global_value(sc->current_input_port_symbol),
-			s7_make_safe_function(sc, "#<set-*stdin*>", g_set_current_input_port, 1, 0, false, "*stdin* setter"));
+                        s7_make_safe_function(sc, "#<set-*stdin*>", g_set_current_input_port, 1, 0, false, "*stdin* setter"));
   c_function_set_setter(global_value(sc->current_output_port_symbol),
-			s7_make_safe_function(sc, "#<set-*stdout*>", g_set_current_output_port, 1, 0, false, "*stdout* setter"));
+                        s7_make_safe_function(sc, "#<set-*stdout*>", g_set_current_output_port, 1, 0, false, "*stdout* setter"));
 #else
   set_is_setter(sc->set_current_input_port_symbol);
   set_is_setter(sc->set_current_output_port_symbol);
@@ -96437,21 +96437,21 @@ static void init_setters(s7_scheme *sc)
   s7_function_set_setter(sc, sc->let_ref_symbol,          sc->let_set_symbol);
   s7_function_set_setter(sc, sc->string_ref_symbol,       sc->string_set_symbol);
   c_function_set_setter(global_value(sc->outlet_symbol),
-			s7_make_safe_function(sc, "#<set-outlet>", g_set_outlet, 2, 0, false, "outlet setter"));
+                        s7_make_safe_function(sc, "#<set-outlet>", g_set_outlet, 2, 0, false, "outlet setter"));
   c_function_set_setter(global_value(sc->port_line_number_symbol),
-			s7_make_safe_function(sc, "#<set-port-line-number>", g_set_port_line_number, 1, 1, false, "port-line setter"));
+                        s7_make_safe_function(sc, "#<set-port-line-number>", g_set_port_line_number, 1, 1, false, "port-line setter"));
   c_function_set_setter(global_value(sc->port_string_symbol),
-			s7_make_safe_function(sc, "#<set-port-string>", g_set_port_string, 2, 0, false, "port-string setter"));
+                        s7_make_safe_function(sc, "#<set-port-string>", g_set_port_string, 2, 0, false, "port-string setter"));
   c_function_set_setter(global_value(sc->port_position_symbol),
-			s7_make_safe_function(sc, "#<set-port-position>", g_set_port_position, 2, 0, false, "port-position setter"));
+                        s7_make_safe_function(sc, "#<set-port-position>", g_set_port_position, 2, 0, false, "port-position setter"));
   c_function_set_setter(global_value(sc->vector_typer_symbol),
-			s7_make_safe_function(sc, "#<set-vector-typer>", g_set_vector_typer, 2, 0, false, "vector-typer setter"));
+                        s7_make_safe_function(sc, "#<set-vector-typer>", g_set_vector_typer, 2, 0, false, "vector-typer setter"));
   c_function_set_setter(global_value(sc->hash_table_key_typer_symbol),
-			s7_make_safe_function(sc, "#<set-hash-table-key-typer>", g_set_hash_table_key_typer, 2, 0, false, "hash-table-key-typer setter"));
+                        s7_make_safe_function(sc, "#<set-hash-table-key-typer>", g_set_hash_table_key_typer, 2, 0, false, "hash-table-key-typer setter"));
   c_function_set_setter(global_value(sc->hash_table_value_typer_symbol),
-			s7_make_safe_function(sc, "#<set-hash-table-value-typer>", g_set_hash_table_value_typer, 2, 0, false, "hash-table-value-typer setter"));
+                        s7_make_safe_function(sc, "#<set-hash-table-value-typer>", g_set_hash_table_value_typer, 2, 0, false, "hash-table-value-typer setter"));
   c_function_set_setter(global_value(sc->symbol_symbol),
-			s7_make_safe_function(sc, "#<symbol-set>", g_symbol_set, 2, 0, true, "symbol setter"));
+                        s7_make_safe_function(sc, "#<symbol-set>", g_symbol_set, 2, 0, true, "symbol setter"));
 }
 
 static void init_syntax(s7_scheme *sc)
@@ -96624,57 +96624,57 @@ static void init_rootlet(s7_scheme *sc)
   sc->is_boolean_symbol = make_symbol(sc, "boolean?", 8);
   sc->pl_bt = s7_make_signature(sc, 2, sc->is_boolean_symbol, sc->T);
 
-  sc->is_symbol_symbol =          bool_defun("symbol?",	         is_symbol,	     0, T_SYMBOL,       mark_symbol_vector, true);
-  sc->is_syntax_symbol =          bool_defun("syntax?",	         is_syntax,	     0, T_SYNTAX,       just_mark_vector,   true);
-  sc->is_gensym_symbol =          bool_defun("gensym?",	         is_gensym,	     0, T_FREE,         mark_symbol_vector, true);
-  sc->is_keyword_symbol =         bool_defun("keyword?",         is_keyword,	     0, T_FREE,         just_mark_vector,   true);
-  sc->is_let_symbol =             bool_defun("let?",	         is_let,	     0, T_LET,          mark_vector_1,      false);
-  sc->is_openlet_symbol =         bool_defun("openlet?",         is_openlet,	     0, T_FREE,         mark_vector_1,      false);
-  sc->is_iterator_symbol =        bool_defun("iterator?",        is_iterator,	     0, T_ITERATOR,     mark_vector_1,      false);
-  sc->is_macro_symbol =           bool_defun("macro?",	         is_macro,	     0, T_FREE,         mark_vector_1,      false);
-  sc->is_c_pointer_symbol =       bool_defun("c-pointer?",       is_c_pointer,	     1, T_C_POINTER,    mark_vector_1,      false);
-  sc->is_input_port_symbol =      bool_defun("input-port?",      is_input_port,	     0, T_INPUT_PORT,   mark_vector_1,      true);
+  sc->is_symbol_symbol =          bool_defun("symbol?",                 is_symbol,             0, T_SYMBOL,       mark_symbol_vector, true);
+  sc->is_syntax_symbol =          bool_defun("syntax?",                 is_syntax,             0, T_SYNTAX,       just_mark_vector,   true);
+  sc->is_gensym_symbol =          bool_defun("gensym?",                 is_gensym,             0, T_FREE,         mark_symbol_vector, true);
+  sc->is_keyword_symbol =         bool_defun("keyword?",         is_keyword,             0, T_FREE,         just_mark_vector,   true);
+  sc->is_let_symbol =             bool_defun("let?",                 is_let,             0, T_LET,          mark_vector_1,      false);
+  sc->is_openlet_symbol =         bool_defun("openlet?",         is_openlet,             0, T_FREE,         mark_vector_1,      false);
+  sc->is_iterator_symbol =        bool_defun("iterator?",        is_iterator,             0, T_ITERATOR,     mark_vector_1,      false);
+  sc->is_macro_symbol =           bool_defun("macro?",                 is_macro,             0, T_FREE,         mark_vector_1,      false);
+  sc->is_c_pointer_symbol =       bool_defun("c-pointer?",       is_c_pointer,             1, T_C_POINTER,    mark_vector_1,      false);
+  sc->is_input_port_symbol =      bool_defun("input-port?",      is_input_port,             0, T_INPUT_PORT,   mark_vector_1,      true);
   sc->is_output_port_symbol =     bool_defun("output-port?",     is_output_port,     0, T_OUTPUT_PORT,  mark_simple_vector, true);
-  sc->is_eof_object_symbol =      bool_defun("eof-object?",      is_eof_object,	     0, T_EOF,          just_mark_vector,   true);
-  sc->is_integer_symbol =         bool_defun("integer?",         is_integer,	     0, (WITH_GMP) ? T_FREE : T_INTEGER, mark_simple_vector, true);
-  sc->is_byte_symbol =            bool_defun("byte?",	         is_byte,	     0, T_FREE,         mark_simple_vector, true);
-  sc->is_number_symbol =          bool_defun("number?",	         is_number,	     0, T_FREE,         mark_simple_vector, true);
-  sc->is_real_symbol =            bool_defun("real?",	         is_real,	     0, T_FREE,         mark_simple_vector, true);
+  sc->is_eof_object_symbol =      bool_defun("eof-object?",      is_eof_object,             0, T_EOF,          just_mark_vector,   true);
+  sc->is_integer_symbol =         bool_defun("integer?",         is_integer,             0, (WITH_GMP) ? T_FREE : T_INTEGER, mark_simple_vector, true);
+  sc->is_byte_symbol =            bool_defun("byte?",                 is_byte,             0, T_FREE,         mark_simple_vector, true);
+  sc->is_number_symbol =          bool_defun("number?",                 is_number,             0, T_FREE,         mark_simple_vector, true);
+  sc->is_real_symbol =            bool_defun("real?",                 is_real,             0, T_FREE,         mark_simple_vector, true);
   sc->is_float_symbol =           bool_defun("float?",           is_float,           0, T_FREE,         mark_simple_vector, true);
-  sc->is_complex_symbol =         bool_defun("complex?",         is_complex,	     0, T_FREE,         mark_simple_vector, true);
-  sc->is_rational_symbol =        bool_defun("rational?",        is_rational,	     0, T_FREE,         mark_simple_vector, true);
+  sc->is_complex_symbol =         bool_defun("complex?",         is_complex,             0, T_FREE,         mark_simple_vector, true);
+  sc->is_rational_symbol =        bool_defun("rational?",        is_rational,             0, T_FREE,         mark_simple_vector, true);
   sc->is_random_state_symbol =    bool_defun("random-state?",    is_random_state,    0, T_RANDOM_STATE, mark_simple_vector, true);
-  sc->is_char_symbol =            bool_defun("char?",	         is_char,	     0, T_CHARACTER,    just_mark_vector,   true);
-  sc->is_string_symbol =          bool_defun("string?",	         is_string,	     0, T_STRING,       mark_simple_vector, true);
-  sc->is_list_symbol =            bool_defun("list?",	         is_list,	     0, T_FREE,         mark_vector_1,      false);
-  sc->is_pair_symbol =            bool_defun("pair?",	         is_pair,	     0, T_PAIR,         mark_vector_1,      false);
-  sc->is_vector_symbol =          bool_defun("vector?",	         is_vector,	     0, T_FREE,         mark_vector_1,      false);
+  sc->is_char_symbol =            bool_defun("char?",                 is_char,             0, T_CHARACTER,    just_mark_vector,   true);
+  sc->is_string_symbol =          bool_defun("string?",                 is_string,             0, T_STRING,       mark_simple_vector, true);
+  sc->is_list_symbol =            bool_defun("list?",                 is_list,             0, T_FREE,         mark_vector_1,      false);
+  sc->is_pair_symbol =            bool_defun("pair?",                 is_pair,             0, T_PAIR,         mark_vector_1,      false);
+  sc->is_vector_symbol =          bool_defun("vector?",                 is_vector,             0, T_FREE,         mark_vector_1,      false);
   sc->is_float_vector_symbol =    bool_defun("float-vector?",    is_float_vector,    0, T_FLOAT_VECTOR, mark_simple_vector, true);
-  sc->is_int_vector_symbol =      bool_defun("int-vector?",      is_int_vector,	     0, T_INT_VECTOR,   mark_simple_vector, true);
+  sc->is_int_vector_symbol =      bool_defun("int-vector?",      is_int_vector,             0, T_INT_VECTOR,   mark_simple_vector, true);
   sc->is_byte_vector_symbol =     bool_defun("byte-vector?",     is_byte_vector,     0, T_BYTE_VECTOR,  mark_simple_vector, true);
   sc->is_hash_table_symbol =      bool_defun("hash-table?",      is_hash_table,      0, T_HASH_TABLE,   mark_vector_1,      false);
   sc->is_continuation_symbol =    bool_defun("continuation?",    is_continuation,    0, T_CONTINUATION, mark_vector_1,      false);
-  sc->is_procedure_symbol =       bool_defun("procedure?",       is_procedure,	     0, T_FREE,         mark_vector_1,      false);
-  sc->is_dilambda_symbol =        bool_defun("dilambda?",        is_dilambda,	     0, T_FREE,         mark_vector_1,      false);
-  /* set above */                 bool_defun("boolean?",         is_boolean,	     0, T_BOOLEAN,      just_mark_vector,   true);
+  sc->is_procedure_symbol =       bool_defun("procedure?",       is_procedure,             0, T_FREE,         mark_vector_1,      false);
+  sc->is_dilambda_symbol =        bool_defun("dilambda?",        is_dilambda,             0, T_FREE,         mark_vector_1,      false);
+  /* set above */                 bool_defun("boolean?",         is_boolean,             0, T_BOOLEAN,      just_mark_vector,   true);
   sc->is_proper_list_symbol =     bool_defun("proper-list?",     is_proper_list,     0, T_FREE,         mark_vector_1,      false);
-  sc->is_sequence_symbol =        bool_defun("sequence?",        is_sequence,	     0, T_FREE,         mark_vector_1,      false);
-  sc->is_null_symbol =            bool_defun("null?",	         is_null,	     0, T_NIL,          just_mark_vector,   true);
+  sc->is_sequence_symbol =        bool_defun("sequence?",        is_sequence,             0, T_FREE,         mark_vector_1,      false);
+  sc->is_null_symbol =            bool_defun("null?",                 is_null,             0, T_NIL,          just_mark_vector,   true);
   sc->is_undefined_symbol =       bool_defun("undefined?",       is_undefined,       0, T_UNDEFINED,    just_mark_vector,   true);
   sc->is_unspecified_symbol =     bool_defun("unspecified?",     is_unspecified,     0, T_UNSPECIFIED,  just_mark_vector,   true);
-  sc->is_c_object_symbol =        bool_defun("c-object?",        is_c_object,	     0, T_C_OBJECT,     mark_vector_1,      false);
-  sc->is_subvector_symbol =       bool_defun("subvector?",       is_subvector,	     0, T_FREE,         mark_vector_1,      false);
+  sc->is_c_object_symbol =        bool_defun("c-object?",        is_c_object,             0, T_C_OBJECT,     mark_vector_1,      false);
+  sc->is_subvector_symbol =       bool_defun("subvector?",       is_subvector,             0, T_FREE,         mark_vector_1,      false);
   sc->is_weak_hash_table_symbol = bool_defun("weak-hash-table?", is_weak_hash_table, 0, T_FREE,         mark_vector_1,      false);
-  sc->is_goto_symbol =            bool_defun("goto?",	         is_goto,            0, T_GOTO,         mark_vector_1,      true);
+  sc->is_goto_symbol =            bool_defun("goto?",                 is_goto,            0, T_GOTO,         mark_vector_1,      true);
 
   /* these are for signatures */
-  sc->not_symbol = defun("not",	not, 1, 0, false);
+  sc->not_symbol = defun("not",        not, 1, 0, false);
   sc->is_integer_or_real_at_end_symbol = make_symbol(sc, "integer:real?", 13);
   sc->is_integer_or_any_at_end_symbol =  make_symbol(sc, "integer:any?", 12);
 
   sc->pl_p =   s7_make_signature(sc, 2, sc->T, sc->is_pair_symbol);
   sc->pl_tl =  s7_make_signature(sc, 3,
-		  s7_make_signature(sc, 2, sc->is_pair_symbol, sc->not_symbol), sc->T, sc->is_list_symbol); /* memq and memv signature */
+                  s7_make_signature(sc, 2, sc->is_pair_symbol, sc->not_symbol), sc->T, sc->is_list_symbol); /* memq and memv signature */
   sc->pl_bc =  s7_make_signature(sc, 2, sc->is_boolean_symbol, sc->is_char_symbol);
   sc->pl_bn =  s7_make_signature(sc, 2, sc->is_boolean_symbol, sc->is_number_symbol);
   sc->pl_nn =  s7_make_signature(sc, 2, sc->is_number_symbol, sc->is_number_symbol);
@@ -96697,114 +96697,114 @@ static void init_rootlet(s7_scheme *sc)
   sc->is_bignum_symbol =             defun("bignum?",           is_bignum,              1, 0, false);
   sc->bignum_symbol =                defun("bignum",            bignum,                 1, 1, false);
 
-  sc->gensym_symbol =                defun("gensym",		gensym,			0, 1, false);
-  sc->symbol_table_symbol =          defun("symbol-table",	symbol_table,		0, 0, false);
-  sc->symbol_to_string_symbol =      defun("symbol->string",	symbol_to_string,	1, 0, false);
-  sc->string_to_symbol_symbol =      defun("string->symbol",	string_to_symbol,	1, 0, false);
-  sc->symbol_symbol =                defun("symbol",		symbol,			1, 0, true);
-  sc->symbol_to_value_symbol =       defun("symbol->value",	symbol_to_value,	1, 1, false);
+  sc->gensym_symbol =                defun("gensym",                gensym,                        0, 1, false);
+  sc->symbol_table_symbol =          defun("symbol-table",        symbol_table,                0, 0, false);
+  sc->symbol_to_string_symbol =      defun("symbol->string",        symbol_to_string,        1, 0, false);
+  sc->string_to_symbol_symbol =      defun("string->symbol",        string_to_symbol,        1, 0, false);
+  sc->symbol_symbol =                defun("symbol",                symbol,                        1, 0, true);
+  sc->symbol_to_value_symbol =       defun("symbol->value",        symbol_to_value,        1, 1, false);
   sc->symbol_to_dynamic_value_symbol = defun("symbol->dynamic-value", symbol_to_dynamic_value, 1, 0, false);
-  sc->immutable_symbol =             unsafe_defun("immutable!",	immutable,		1, 1, false); /* unsafe 11-Oct-23, added let arg 13-Oct-23 */
+  sc->immutable_symbol =             unsafe_defun("immutable!",        immutable,                1, 1, false); /* unsafe 11-Oct-23, added let arg 13-Oct-23 */
   set_func_is_definer(sc->immutable_symbol);
-  sc->is_immutable_symbol =          defun("immutable?",	is_immutable,		1, 1, false); /* added optional let arg 13-Oct-23 */
-  sc->is_constant_symbol =           defun("constant?",	        is_constant,		1, 0, false);
-  sc->string_to_keyword_symbol =     defun("string->keyword",	string_to_keyword,      1, 0, false);
-  sc->symbol_to_keyword_symbol =     defun("symbol->keyword",	symbol_to_keyword,	1, 0, false);
-  sc->keyword_to_symbol_symbol =     defun("keyword->symbol",	keyword_to_symbol,	1, 0, false);
-
-  sc->outlet_symbol =                defun("outlet",	        outlet,		        1, 0, false);
-  sc->rootlet_symbol =               defun("rootlet",           rootlet,		0, 0, false);
-  sc->curlet_symbol =                unsafe_defun("curlet",     curlet,			0, 0, false); /* (define (f a) (curlet)) exports the funclet, see s7test 50215 */
+  sc->is_immutable_symbol =          defun("immutable?",        is_immutable,                1, 1, false); /* added optional let arg 13-Oct-23 */
+  sc->is_constant_symbol =           defun("constant?",                is_constant,                1, 0, false);
+  sc->string_to_keyword_symbol =     defun("string->keyword",        string_to_keyword,      1, 0, false);
+  sc->symbol_to_keyword_symbol =     defun("symbol->keyword",        symbol_to_keyword,        1, 0, false);
+  sc->keyword_to_symbol_symbol =     defun("keyword->symbol",        keyword_to_symbol,        1, 0, false);
+
+  sc->outlet_symbol =                defun("outlet",                outlet,                        1, 0, false);
+  sc->rootlet_symbol =               defun("rootlet",           rootlet,                0, 0, false);
+  sc->curlet_symbol =                unsafe_defun("curlet",     curlet,                        0, 0, false); /* (define (f a) (curlet)) exports the funclet, see s7test 50215 */
   set_func_is_definer(sc->curlet_symbol);
-  sc->unlet_symbol =                 defun("unlet",		unlet,			0, 0, false);
+  sc->unlet_symbol =                 defun("unlet",                unlet,                        0, 0, false);
   set_local_slot(sc->unlet_symbol, global_slot(sc->unlet_symbol)); /* for set_locals */
   set_immutable(sc->unlet_symbol);
   set_immutable_slot(global_slot(sc->unlet_symbol));
   /* unlet (and with-let) don't actually need to be immutable, but s7.html says they are... */
   sc->is_funclet_symbol =            defun("funclet?",          is_funclet,             1, 0, false);
-  sc->sublet_symbol =                defun("sublet",		sublet,			1, 0, true);
-  sc->varlet_symbol =                semisafe_defun("varlet",	varlet,			2, 0, true); /* was 1,0 13-Aug-22 */
+  sc->sublet_symbol =                defun("sublet",                sublet,                        1, 0, true);
+  sc->varlet_symbol =                semisafe_defun("varlet",        varlet,                        2, 0, true); /* was 1,0 13-Aug-22 */
   set_func_is_definer(sc->varlet_symbol);
-  sc->cutlet_symbol =                semisafe_defun("cutlet",	cutlet,			2, 0, true); /* was 1,0 13-Aug-22 */
+  sc->cutlet_symbol =                semisafe_defun("cutlet",        cutlet,                        2, 0, true); /* was 1,0 13-Aug-22 */
   set_func_is_definer(sc->cutlet_symbol);
-  sc->inlet_symbol =                 defun("inlet",		inlet,			0, 0, true);
-  sc->owlet_symbol =                 defun("owlet",		owlet,			0, 0, false);
-  sc->coverlet_symbol =              defun("coverlet",		coverlet,		1, 0, false);
-  sc->openlet_symbol =               defun("openlet",		openlet,		1, 0, false);
-  sc->let_ref_symbol =               defun("let-ref",		let_ref,		2, 0, false);
+  sc->inlet_symbol =                 defun("inlet",                inlet,                        0, 0, true);
+  sc->owlet_symbol =                 defun("owlet",                owlet,                        0, 0, false);
+  sc->coverlet_symbol =              defun("coverlet",                coverlet,                1, 0, false);
+  sc->openlet_symbol =               defun("openlet",                openlet,                1, 0, false);
+  sc->let_ref_symbol =               defun("let-ref",                let_ref,                2, 0, false);
   set_immutable(sc->let_ref_symbol);  /* 16-Sep-19 */
   set_immutable_slot(global_slot(sc->let_ref_symbol));
-  sc->let_set_symbol =               defun("let-set!",		let_set,		3, 0, false);
+  sc->let_set_symbol =               defun("let-set!",                let_set,                3, 0, false);
   set_immutable(sc->let_set_symbol);
   set_immutable_slot(global_slot(sc->let_set_symbol));
   sc->let_ref_fallback_symbol = make_symbol(sc, "let-ref-fallback", 16);
   sc->let_set_fallback_symbol = make_symbol(sc, "let-set-fallback", 16); /* was let-set!-fallback until 9-Oct-17 */
 
-  sc->make_iterator_symbol =         defun("make-iterator",	make_iterator,		1, 1, false);
-  sc->iterate_symbol =               defun("iterate",		iterate,		1, 0, false);
-  sc->iterator_sequence_symbol =     defun("iterator-sequence", iterator_sequence,	1, 0, false);
-  sc->iterator_is_at_end_symbol =    defun("iterator-at-end?",  iterator_is_at_end,	1, 0, false);
+  sc->make_iterator_symbol =         defun("make-iterator",        make_iterator,                1, 1, false);
+  sc->iterate_symbol =               defun("iterate",                iterate,                1, 0, false);
+  sc->iterator_sequence_symbol =     defun("iterator-sequence", iterator_sequence,        1, 0, false);
+  sc->iterator_is_at_end_symbol =    defun("iterator-at-end?",  iterator_is_at_end,        1, 0, false);
 
-  sc->is_provided_symbol =           defun("provided?",	        is_provided,		1, 0, false);
-  sc->provide_symbol =               semisafe_defun("provide",	provide,		1, 0, false); /* can add *features* to curlet */
+  sc->is_provided_symbol =           defun("provided?",                is_provided,                1, 0, false);
+  sc->provide_symbol =               semisafe_defun("provide",        provide,                1, 0, false); /* can add *features* to curlet */
   set_func_is_definer(sc->provide_symbol);
-  sc->is_defined_symbol =            defun("defined?",		is_defined,		1, 2, false);
-
-  sc->c_object_type_symbol =         defun("c-object-type",     c_object_type,		1, 0, false);
-  sc->c_pointer_symbol =             defun("c-pointer",	        c_pointer,		1, 4, false);
-  sc->c_pointer_info_symbol =        defun("c-pointer-info",    c_pointer_info,		1, 0, false);
-  sc->c_pointer_type_symbol =        defun("c-pointer-type",    c_pointer_type,		1, 0, false);
-  sc->c_pointer_weak1_symbol =       defun("c-pointer-weak1",   c_pointer_weak1,	1, 0, false);
-  sc->c_pointer_weak2_symbol =       defun("c-pointer-weak2",   c_pointer_weak2,	1, 0, false);
+  sc->is_defined_symbol =            defun("defined?",                is_defined,                1, 2, false);
+
+  sc->c_object_type_symbol =         defun("c-object-type",     c_object_type,                1, 0, false);
+  sc->c_pointer_symbol =             defun("c-pointer",                c_pointer,                1, 4, false);
+  sc->c_pointer_info_symbol =        defun("c-pointer-info",    c_pointer_info,                1, 0, false);
+  sc->c_pointer_type_symbol =        defun("c-pointer-type",    c_pointer_type,                1, 0, false);
+  sc->c_pointer_weak1_symbol =       defun("c-pointer-weak1",   c_pointer_weak1,        1, 0, false);
+  sc->c_pointer_weak2_symbol =       defun("c-pointer-weak2",   c_pointer_weak2,        1, 0, false);
   sc->c_pointer_to_list_symbol =     defun("c-pointer->list",   c_pointer_to_list,      1, 0, false);
 
-  sc->port_string_symbol =           defun("port-string",       port_string,		1, 0, false);
-  sc->port_file_symbol =             defun("port-file",	        port_file,		1, 0, false);
-  sc->port_position_symbol =         defun("port-position",	port_position,		1, 0, false);
-  sc->port_line_number_symbol =      defun("port-line-number",  port_line_number,	0, 1, false);
-  sc->port_filename_symbol =         defun("port-filename",	port_filename,		0, 1, false);
-  sc->pair_line_number_symbol =      defun("pair-line-number",  pair_line_number,	1, 0, false);
-  sc->pair_filename_symbol =         defun("pair-filename",     pair_filename,	        1, 0, false);
-  sc->is_port_closed_symbol =        defun("port-closed?",	is_port_closed,		1, 0, false);
+  sc->port_string_symbol =           defun("port-string",       port_string,                1, 0, false);
+  sc->port_file_symbol =             defun("port-file",                port_file,                1, 0, false);
+  sc->port_position_symbol =         defun("port-position",        port_position,                1, 0, false);
+  sc->port_line_number_symbol =      defun("port-line-number",  port_line_number,        0, 1, false);
+  sc->port_filename_symbol =         defun("port-filename",        port_filename,                0, 1, false);
+  sc->pair_line_number_symbol =      defun("pair-line-number",  pair_line_number,        1, 0, false);
+  sc->pair_filename_symbol =         defun("pair-filename",     pair_filename,                1, 0, false);
+  sc->is_port_closed_symbol =        defun("port-closed?",        is_port_closed,                1, 0, false);
 
   sc->current_input_port_symbol =    defun("current-input-port",  current_input_port,  0, 0, false);
   sc->current_output_port_symbol =   defun("current-output-port", current_output_port, 0, 0, false);
   sc->current_error_port_symbol =    defun("current-error-port", current_error_port,    0, 0, false);
   sc->set_current_error_port_symbol = defun("set-current-error-port", set_current_error_port, 1, 0, false);
 #if (!WITH_PURE_S7)
-  sc->let_to_list_symbol =           defun("let->list",	         let_to_list,		1, 0, false);
+  sc->let_to_list_symbol =           defun("let->list",                 let_to_list,                1, 0, false);
   sc->set_current_input_port_symbol = defun("set-current-input-port", set_current_input_port, 1, 0, false);
   sc->set_current_output_port_symbol = defun("set-current-output-port", set_current_output_port, 1, 0, false);
-  sc->is_char_ready_symbol =         defun("char-ready?",	is_char_ready,		0, 1, false); /* the least-used scheme function */
+  sc->is_char_ready_symbol =         defun("char-ready?",        is_char_ready,                0, 1, false); /* the least-used scheme function */
 #endif
 
-  sc->close_input_port_symbol =      defun("close-input-port",   close_input_port,	1, 0, false);
-  sc->close_output_port_symbol =     defun("close-output-port",  close_output_port,	1, 0, false);
-  sc->flush_output_port_symbol =     defun("flush-output-port",  flush_output_port,	0, 1, false);
-  sc->open_input_file_symbol =       defun("open-input-file",    open_input_file,	1, 1, false);
-  sc->open_output_file_symbol =      defun("open-output-file",   open_output_file,	1, 1, false);
-  sc->open_input_string_symbol =     defun("open-input-string",  open_input_string,	1, 0, false);
-  sc->open_output_string_symbol =    defun("open-output-string", open_output_string,	0, 0, false);
-  sc->get_output_string_symbol =     defun("get-output-string",  get_output_string,	1, 1, false);
+  sc->close_input_port_symbol =      defun("close-input-port",   close_input_port,        1, 0, false);
+  sc->close_output_port_symbol =     defun("close-output-port",  close_output_port,        1, 0, false);
+  sc->flush_output_port_symbol =     defun("flush-output-port",  flush_output_port,        0, 1, false);
+  sc->open_input_file_symbol =       defun("open-input-file",    open_input_file,        1, 1, false);
+  sc->open_output_file_symbol =      defun("open-output-file",   open_output_file,        1, 1, false);
+  sc->open_input_string_symbol =     defun("open-input-string",  open_input_string,        1, 0, false);
+  sc->open_output_string_symbol =    defun("open-output-string", open_output_string,        0, 0, false);
+  sc->get_output_string_symbol =     defun("get-output-string",  get_output_string,        1, 1, false);
   sc->get_output_string_uncopied =   s7_make_safe_function(sc, "get-output-string", g_get_output_string_uncopied, 1, 1, false, NULL);
-  sc->open_input_function_symbol =   defun("open-input-function",open_input_function,	1, 0, false);
-  sc->open_output_function_symbol =  defun("open-output-function",open_output_function,	1, 0, false);
+  sc->open_input_function_symbol =   defun("open-input-function",open_input_function,        1, 0, false);
+  sc->open_output_function_symbol =  defun("open-output-function",open_output_function,        1, 0, false);
 
   sc->closed_input_function = s7_make_safe_function(sc, "closed-input-function", g_closed_input_function_port, 2, 0, false, "input-function error"),
   sc->closed_output_function = s7_make_safe_function(sc, "closed-output-function", g_closed_output_function_port, 1, 0, false, "output-function error"),
 
-  sc->newline_symbol =               defun("newline",		newline,		0, 1, false);
-  sc->write_symbol =                 defun("write",		write,			1, 1, false);
-  sc->display_symbol =               defun("display",		display,		1, 1, false);
-  sc->read_char_symbol =             defun("read-char",	        read_char,		0, 1, false);
-  sc->peek_char_symbol =             defun("peek-char",	        peek_char,		0, 1, false);
-  sc->write_char_symbol =            defun("write-char",	write_char,		1, 1, false);
-  sc->write_string_symbol =          defun("write-string",	write_string,		1, 3, false);
-  sc->read_byte_symbol =             defun("read-byte",	        read_byte,		0, 1, false);
-  sc->write_byte_symbol =            defun("write-byte",	write_byte,		1, 1, false);
-  sc->read_line_symbol =             defun("read-line",	        read_line,		0, 2, false);
-  sc->read_string_symbol =           defun("read-string",	read_string,		1, 1, false);
-  sc->read_symbol =                  semisafe_defun("read",	read,			0, 1, false);
+  sc->newline_symbol =               defun("newline",                newline,                0, 1, false);
+  sc->write_symbol =                 defun("write",                write,                        1, 1, false);
+  sc->display_symbol =               defun("display",                display,                1, 1, false);
+  sc->read_char_symbol =             defun("read-char",                read_char,                0, 1, false);
+  sc->peek_char_symbol =             defun("peek-char",                peek_char,                0, 1, false);
+  sc->write_char_symbol =            defun("write-char",        write_char,                1, 1, false);
+  sc->write_string_symbol =          defun("write-string",        write_string,                1, 3, false);
+  sc->read_byte_symbol =             defun("read-byte",                read_byte,                0, 1, false);
+  sc->write_byte_symbol =            defun("write-byte",        write_byte,                1, 1, false);
+  sc->read_line_symbol =             defun("read-line",                read_line,                0, 2, false);
+  sc->read_string_symbol =           defun("read-string",        read_string,                1, 1, false);
+  sc->read_symbol =                  semisafe_defun("read",        read,                        0, 1, false);
   /* read can't be safe because it messes with the stack, expecting to be all by itself in the call sequence
    *   (not embedded in OP_SAFE_C_opSq for example) -- that is, it pushes OP_READ_INTERNAL, then returns
    *   expecting continue (goto top-of-eval-loop), which would be nonsense if arg=fn|x_proc(read) -> fn|x_proc(arg).
@@ -96826,288 +96826,288 @@ static void init_rootlet(s7_scheme *sc)
   sc->with_output_to_file_symbol =     semisafe_defun("with-output-to-file",     with_output_to_file,     2, 0, false);
 
 #if WITH_SYSTEM_EXTRAS
-  sc->is_directory_symbol =          defun("directory?",	is_directory,		1, 0, false);
-  sc->file_exists_symbol =           defun("file-exists?",	file_exists,		1, 0, false);
-  sc->delete_file_symbol =           defun("delete-file",	delete_file,		1, 0, false);
-  sc->getenv_symbol =                defun("getenv",		getenv,			1, 0, false);
-  sc->system_symbol =                defun("system",		system,			1, 1, false);
+  sc->is_directory_symbol =          defun("directory?",        is_directory,                1, 0, false);
+  sc->file_exists_symbol =           defun("file-exists?",        file_exists,                1, 0, false);
+  sc->delete_file_symbol =           defun("delete-file",        delete_file,                1, 0, false);
+  sc->getenv_symbol =                defun("getenv",                getenv,                        1, 0, false);
+  sc->system_symbol =                defun("system",                system,                        1, 1, false);
 #if (!MS_WINDOWS)
-  sc->directory_to_list_symbol =     defun("directory->list",   directory_to_list,	1, 0, false);
-  sc->file_mtime_symbol =            defun("file-mtime",	file_mtime,		1, 0, false);
-#endif
-#endif
-
-  sc->real_part_symbol =             defun("real-part",	        real_part,		1, 0, false);
-  sc->imag_part_symbol =             defun("imag-part",	        imag_part,		1, 0, false);
-  sc->numerator_symbol =             defun("numerator",	        numerator,		1, 0, false);
-  sc->denominator_symbol =           defun("denominator",	denominator,		1, 0, false);
-  sc->is_even_symbol =               defun("even?",		is_even,		1, 0, false);
-  sc->is_odd_symbol =                defun("odd?",		is_odd,			1, 0, false);
-  sc->is_zero_symbol =               defun("zero?",		is_zero,		1, 0, false);
-  sc->is_positive_symbol =           defun("positive?",	        is_positive,		1, 0, false);
-  sc->is_negative_symbol =           defun("negative?",	        is_negative,		1, 0, false);
-  sc->is_infinite_symbol =           defun("infinite?",	        is_infinite,		1, 0, false);
-  sc->is_nan_symbol =                defun("nan?",		is_nan,			1, 0, false);
-  sc->complex_symbol =               defun("complex",	        complex,	        2, 0, false);
-
-  sc->add_symbol =                   defun("+",		        add,			0, 0, true); set_all_integer_and_float(sc->add_symbol);
-  sc->subtract_symbol =              defun("-",		        subtract,		1, 0, true); set_all_integer_and_float(sc->subtract_symbol);
-  sc->multiply_symbol =              defun("*",		        multiply,		0, 0, true); set_all_integer_and_float(sc->multiply_symbol);
-  sc->divide_symbol =                defun("/",		        divide,			1, 0, true); set_all_float(sc->divide_symbol);
-  sc->min_symbol =                   defun("min",		min,			1, 0, true); set_all_integer_and_float(sc->min_symbol);
-  sc->max_symbol =                   defun("max",		max,			1, 0, true); set_all_integer_and_float(sc->max_symbol);
-
-  sc->quotient_symbol =              defun("quotient",		quotient,		2, 0, false); set_all_integer(sc->quotient_symbol);
-  sc->remainder_symbol =             defun("remainder",	        remainder,		2, 0, false); set_all_integer(sc->remainder_symbol);
-  sc->modulo_symbol =                defun("modulo",		modulo,			2, 0, false); set_all_integer(sc->modulo_symbol);
-  sc->num_eq_symbol =                defun("=",		        num_eq,			2, 0, true);
-  sc->lt_symbol =                    defun("<",		        less,			2, 0, true);
-  sc->gt_symbol =                    defun(">",		        greater,		2, 0, true);
-  sc->leq_symbol =                   defun("<=",		less_or_equal,		2, 0, true);
-  sc->geq_symbol =                   defun(">=",		greater_or_equal,	2, 0, true);
-  sc->gcd_symbol =                   defun("gcd",		gcd,			0, 0, true);
-  sc->lcm_symbol =                   defun("lcm",		lcm,			0, 0, true);
-  sc->rationalize_symbol =           defun("rationalize",	rationalize,		1, 1, false);
-  sc->random_symbol =                defun("random",		random,			1, 1, false); set_all_integer_and_float(sc->random_symbol);
-  sc->random_state_symbol =          defun("random-state",      random_state,	        0, (WITH_GMP) ? 1 : 2, false);
-  sc->expt_symbol =                  defun("expt",		expt,			2, 0, false);
-  sc->log_symbol =                   defun("log",		log,			1, 1, false);
-  sc->ash_symbol =                   defun("ash",		ash,			2, 0, false);
-  sc->exp_symbol =                   defun("exp",		exp,			1, 0, false); set_all_float(sc->exp_symbol);
-  sc->abs_symbol =                   defun("abs",		abs,			1, 0, false); set_all_integer_and_float(sc->abs_symbol);
-  sc->magnitude_symbol =             defun("magnitude",	        magnitude,		1, 0, false); set_all_integer_and_float(sc->magnitude_symbol);
-  sc->angle_symbol =                 defun("angle",		angle,			1, 0, false);
-  sc->sin_symbol =                   defun("sin",		sin,			1, 0, false); set_all_float(sc->sin_symbol);
-  sc->cos_symbol =                   defun("cos",		cos,			1, 0, false); set_all_float(sc->cos_symbol);
-  sc->tan_symbol =                   defun("tan",		tan,			1, 0, false); set_all_float(sc->tan_symbol);
-  sc->sinh_symbol =                  defun("sinh",		sinh,			1, 0, false); set_all_float(sc->sinh_symbol);
-  sc->cosh_symbol =                  defun("cosh",		cosh,			1, 0, false); set_all_float(sc->cosh_symbol);
-  sc->tanh_symbol =                  defun("tanh",		tanh,			1, 0, false); set_all_float(sc->tanh_symbol);
-  sc->asin_symbol =                  defun("asin",		asin,			1, 0, false);
-  sc->acos_symbol =                  defun("acos",		acos,			1, 0, false);
-  sc->atan_symbol =                  defun("atan",		atan,			1, 1, false);
-  sc->asinh_symbol =                 defun("asinh",		asinh,			1, 0, false);
-  sc->acosh_symbol =                 defun("acosh",		acosh,			1, 0, false);
-  sc->atanh_symbol =                 defun("atanh",		atanh,			1, 0, false);
-  sc->sqrt_symbol =                  defun("sqrt",		sqrt,			1, 0, false);
-  sc->floor_symbol =                 defun("floor",		floor,			1, 0, false);
-  sc->ceiling_symbol =               defun("ceiling",		ceiling,		1, 0, false);
-  sc->truncate_symbol =              defun("truncate",		truncate,		1, 0, false);
-  sc->round_symbol =                 defun("round",		round,			1, 0, false);
-  sc->logand_symbol =                defun("logand",		logand,			0, 0, true);
-  sc->logior_symbol =                defun("logior",		logior,			0, 0, true);
-  sc->logxor_symbol =                defun("logxor",		logxor,			0, 0, true);
-  sc->lognot_symbol =                defun("lognot",		lognot,			1, 0, false);
-  sc->logbit_symbol =                defun("logbit?",		logbit,			2, 0, false);
+  sc->directory_to_list_symbol =     defun("directory->list",   directory_to_list,        1, 0, false);
+  sc->file_mtime_symbol =            defun("file-mtime",        file_mtime,                1, 0, false);
+#endif
+#endif
+
+  sc->real_part_symbol =             defun("real-part",                real_part,                1, 0, false);
+  sc->imag_part_symbol =             defun("imag-part",                imag_part,                1, 0, false);
+  sc->numerator_symbol =             defun("numerator",                numerator,                1, 0, false);
+  sc->denominator_symbol =           defun("denominator",        denominator,                1, 0, false);
+  sc->is_even_symbol =               defun("even?",                is_even,                1, 0, false);
+  sc->is_odd_symbol =                defun("odd?",                is_odd,                        1, 0, false);
+  sc->is_zero_symbol =               defun("zero?",                is_zero,                1, 0, false);
+  sc->is_positive_symbol =           defun("positive?",                is_positive,                1, 0, false);
+  sc->is_negative_symbol =           defun("negative?",                is_negative,                1, 0, false);
+  sc->is_infinite_symbol =           defun("infinite?",                is_infinite,                1, 0, false);
+  sc->is_nan_symbol =                defun("nan?",                is_nan,                        1, 0, false);
+  sc->complex_symbol =               defun("complex",                complex,                2, 0, false);
+
+  sc->add_symbol =                   defun("+",                        add,                        0, 0, true); set_all_integer_and_float(sc->add_symbol);
+  sc->subtract_symbol =              defun("-",                        subtract,                1, 0, true); set_all_integer_and_float(sc->subtract_symbol);
+  sc->multiply_symbol =              defun("*",                        multiply,                0, 0, true); set_all_integer_and_float(sc->multiply_symbol);
+  sc->divide_symbol =                defun("/",                        divide,                        1, 0, true); set_all_float(sc->divide_symbol);
+  sc->min_symbol =                   defun("min",                min,                        1, 0, true); set_all_integer_and_float(sc->min_symbol);
+  sc->max_symbol =                   defun("max",                max,                        1, 0, true); set_all_integer_and_float(sc->max_symbol);
+
+  sc->quotient_symbol =              defun("quotient",                quotient,                2, 0, false); set_all_integer(sc->quotient_symbol);
+  sc->remainder_symbol =             defun("remainder",                remainder,                2, 0, false); set_all_integer(sc->remainder_symbol);
+  sc->modulo_symbol =                defun("modulo",                modulo,                        2, 0, false); set_all_integer(sc->modulo_symbol);
+  sc->num_eq_symbol =                defun("=",                        num_eq,                        2, 0, true);
+  sc->lt_symbol =                    defun("<",                        less,                        2, 0, true);
+  sc->gt_symbol =                    defun(">",                        greater,                2, 0, true);
+  sc->leq_symbol =                   defun("<=",                less_or_equal,                2, 0, true);
+  sc->geq_symbol =                   defun(">=",                greater_or_equal,        2, 0, true);
+  sc->gcd_symbol =                   defun("gcd",                gcd,                        0, 0, true);
+  sc->lcm_symbol =                   defun("lcm",                lcm,                        0, 0, true);
+  sc->rationalize_symbol =           defun("rationalize",        rationalize,                1, 1, false);
+  sc->random_symbol =                defun("random",                random,                        1, 1, false); set_all_integer_and_float(sc->random_symbol);
+  sc->random_state_symbol =          defun("random-state",      random_state,                0, (WITH_GMP) ? 1 : 2, false);
+  sc->expt_symbol =                  defun("expt",                expt,                        2, 0, false);
+  sc->log_symbol =                   defun("log",                log,                        1, 1, false);
+  sc->ash_symbol =                   defun("ash",                ash,                        2, 0, false);
+  sc->exp_symbol =                   defun("exp",                exp,                        1, 0, false); set_all_float(sc->exp_symbol);
+  sc->abs_symbol =                   defun("abs",                abs,                        1, 0, false); set_all_integer_and_float(sc->abs_symbol);
+  sc->magnitude_symbol =             defun("magnitude",                magnitude,                1, 0, false); set_all_integer_and_float(sc->magnitude_symbol);
+  sc->angle_symbol =                 defun("angle",                angle,                        1, 0, false);
+  sc->sin_symbol =                   defun("sin",                sin,                        1, 0, false); set_all_float(sc->sin_symbol);
+  sc->cos_symbol =                   defun("cos",                cos,                        1, 0, false); set_all_float(sc->cos_symbol);
+  sc->tan_symbol =                   defun("tan",                tan,                        1, 0, false); set_all_float(sc->tan_symbol);
+  sc->sinh_symbol =                  defun("sinh",                sinh,                        1, 0, false); set_all_float(sc->sinh_symbol);
+  sc->cosh_symbol =                  defun("cosh",                cosh,                        1, 0, false); set_all_float(sc->cosh_symbol);
+  sc->tanh_symbol =                  defun("tanh",                tanh,                        1, 0, false); set_all_float(sc->tanh_symbol);
+  sc->asin_symbol =                  defun("asin",                asin,                        1, 0, false);
+  sc->acos_symbol =                  defun("acos",                acos,                        1, 0, false);
+  sc->atan_symbol =                  defun("atan",                atan,                        1, 1, false);
+  sc->asinh_symbol =                 defun("asinh",                asinh,                        1, 0, false);
+  sc->acosh_symbol =                 defun("acosh",                acosh,                        1, 0, false);
+  sc->atanh_symbol =                 defun("atanh",                atanh,                        1, 0, false);
+  sc->sqrt_symbol =                  defun("sqrt",                sqrt,                        1, 0, false);
+  sc->floor_symbol =                 defun("floor",                floor,                        1, 0, false);
+  sc->ceiling_symbol =               defun("ceiling",                ceiling,                1, 0, false);
+  sc->truncate_symbol =              defun("truncate",                truncate,                1, 0, false);
+  sc->round_symbol =                 defun("round",                round,                        1, 0, false);
+  sc->logand_symbol =                defun("logand",                logand,                        0, 0, true);
+  sc->logior_symbol =                defun("logior",                logior,                        0, 0, true);
+  sc->logxor_symbol =                defun("logxor",                logxor,                        0, 0, true);
+  sc->lognot_symbol =                defun("lognot",                lognot,                        1, 0, false);
+  sc->logbit_symbol =                defun("logbit?",                logbit,                        2, 0, false);
   sc->integer_decode_float_symbol =  defun("integer-decode-float", integer_decode_float, 1, 0, false);
   sc->nan_symbol =                   defun("nan",               nan,                    0, 1, false); /* (nan) -> +nan.0, (nan 123) -> +nan.123 */
   sc->nan_payload_symbol =           defun("nan-payload",       nan_payload,            1, 0, false);
 
 #if (!WITH_PURE_S7)
-  sc->integer_length_symbol =        defun("integer-length",	integer_length,		1, 0, false);
-  sc->inexact_to_exact_symbol =      defun("inexact->exact",	inexact_to_exact,	1, 0, false);
-  sc->exact_to_inexact_symbol =      defun("exact->inexact",	exact_to_inexact,	1, 0, false);
-  sc->is_exact_symbol =              defun("exact?",		is_exact,		1, 0, false);
-  sc->is_inexact_symbol =            defun("inexact?",		is_inexact,		1, 0, false);
+  sc->integer_length_symbol =        defun("integer-length",        integer_length,                1, 0, false);
+  sc->inexact_to_exact_symbol =      defun("inexact->exact",        inexact_to_exact,        1, 0, false);
+  sc->exact_to_inexact_symbol =      defun("exact->inexact",        exact_to_inexact,        1, 0, false);
+  sc->is_exact_symbol =              defun("exact?",                is_exact,                1, 0, false);
+  sc->is_inexact_symbol =            defun("inexact?",                is_inexact,                1, 0, false);
 #endif
   sc->random_state_to_list_symbol =  defun("random-state->list", random_state_to_list,  0, 1, false);
-  sc->number_to_string_symbol =      defun("number->string",	number_to_string,	1, 1, false);
-  sc->string_to_number_symbol =      defun("string->number",	string_to_number,	1, 1, false);
-
-  sc->char_upcase_symbol =           defun("char-upcase",	char_upcase,		1, 0, false);
-  sc->char_downcase_symbol =         defun("char-downcase",	char_downcase,		1, 0, false);
-  sc->char_to_integer_symbol =       defun("char->integer",	char_to_integer,	1, 0, false);
-  sc->integer_to_char_symbol =       defun("integer->char",	integer_to_char,	1, 0, false);
-
-  sc->is_char_upper_case_symbol =    defun("char-upper-case?",  is_char_upper_case,	1, 0, false);
-  sc->is_char_lower_case_symbol =    defun("char-lower-case?",  is_char_lower_case,	1, 0, false);
-  sc->is_char_alphabetic_symbol =    defun("char-alphabetic?",  is_char_alphabetic,	1, 0, false);
-  sc->is_char_numeric_symbol =       defun("char-numeric?",	is_char_numeric,	1, 0, false);
-  sc->is_char_whitespace_symbol =    defun("char-whitespace?",  is_char_whitespace,	1, 0, false);
-
-  sc->char_eq_symbol =               defun("char=?",		chars_are_equal,	2, 0, true);
-  sc->char_lt_symbol =               defun("char<?",		chars_are_less,		2, 0, true);
-  sc->char_gt_symbol =               defun("char>?",		chars_are_greater,	2, 0, true);
-  sc->char_leq_symbol =              defun("char<=?",		chars_are_leq,		2, 0, true);
-  sc->char_geq_symbol =              defun("char>=?",		chars_are_geq,		2, 0, true);
-  sc->char_position_symbol =         defun("char-position",	char_position,		2, 1, false);
-  sc->string_position_symbol =       defun("string-position",	string_position,	2, 1, false);
-
-  sc->make_string_symbol =           defun("make-string",	make_string,		1, 1, false);
-  sc->string_ref_symbol =            defun("string-ref",	string_ref,		2, 0, false);
-  sc->string_set_symbol =            defun("string-set!",	string_set,		3, 0, false);
-
-  sc->string_eq_symbol =             defun("string=?",		strings_are_equal,	2, 0, true);
-  sc->string_lt_symbol =             defun("string<?",		strings_are_less,	2, 0, true);
-  sc->string_gt_symbol =             defun("string>?",		strings_are_greater,	2, 0, true);
-  sc->string_leq_symbol =            defun("string<=?",	        strings_are_leq,	2, 0, true);
-  sc->string_geq_symbol =            defun("string>=?",	        strings_are_geq,	2, 0, true);
+  sc->number_to_string_symbol =      defun("number->string",        number_to_string,        1, 1, false);
+  sc->string_to_number_symbol =      defun("string->number",        string_to_number,        1, 1, false);
+
+  sc->char_upcase_symbol =           defun("char-upcase",        char_upcase,                1, 0, false);
+  sc->char_downcase_symbol =         defun("char-downcase",        char_downcase,                1, 0, false);
+  sc->char_to_integer_symbol =       defun("char->integer",        char_to_integer,        1, 0, false);
+  sc->integer_to_char_symbol =       defun("integer->char",        integer_to_char,        1, 0, false);
+
+  sc->is_char_upper_case_symbol =    defun("char-upper-case?",  is_char_upper_case,        1, 0, false);
+  sc->is_char_lower_case_symbol =    defun("char-lower-case?",  is_char_lower_case,        1, 0, false);
+  sc->is_char_alphabetic_symbol =    defun("char-alphabetic?",  is_char_alphabetic,        1, 0, false);
+  sc->is_char_numeric_symbol =       defun("char-numeric?",        is_char_numeric,        1, 0, false);
+  sc->is_char_whitespace_symbol =    defun("char-whitespace?",  is_char_whitespace,        1, 0, false);
+
+  sc->char_eq_symbol =               defun("char=?",                chars_are_equal,        2, 0, true);
+  sc->char_lt_symbol =               defun("char<?",                chars_are_less,                2, 0, true);
+  sc->char_gt_symbol =               defun("char>?",                chars_are_greater,        2, 0, true);
+  sc->char_leq_symbol =              defun("char<=?",                chars_are_leq,                2, 0, true);
+  sc->char_geq_symbol =              defun("char>=?",                chars_are_geq,                2, 0, true);
+  sc->char_position_symbol =         defun("char-position",        char_position,                2, 1, false);
+  sc->string_position_symbol =       defun("string-position",        string_position,        2, 1, false);
+
+  sc->make_string_symbol =           defun("make-string",        make_string,                1, 1, false);
+  sc->string_ref_symbol =            defun("string-ref",        string_ref,                2, 0, false);
+  sc->string_set_symbol =            defun("string-set!",        string_set,                3, 0, false);
+
+  sc->string_eq_symbol =             defun("string=?",                strings_are_equal,        2, 0, true);
+  sc->string_lt_symbol =             defun("string<?",                strings_are_less,        2, 0, true);
+  sc->string_gt_symbol =             defun("string>?",                strings_are_greater,        2, 0, true);
+  sc->string_leq_symbol =            defun("string<=?",                strings_are_leq,        2, 0, true);
+  sc->string_geq_symbol =            defun("string>=?",                strings_are_geq,        2, 0, true);
 
 #if (!WITH_PURE_S7)
-  sc->char_ci_eq_symbol =            defun("char-ci=?",	        chars_are_ci_equal,	2, 0, true);
-  sc->char_ci_lt_symbol =            defun("char-ci<?",	        chars_are_ci_less,	2, 0, true);
-  sc->char_ci_gt_symbol =            defun("char-ci>?",	        chars_are_ci_greater,	2, 0, true);
-  sc->char_ci_leq_symbol =           defun("char-ci<=?",	chars_are_ci_leq,	2, 0, true);
-  sc->char_ci_geq_symbol =           defun("char-ci>=?",	chars_are_ci_geq,	2, 0, true);
-  sc->string_ci_eq_symbol =          defun("string-ci=?",	strings_are_ci_equal,	2, 0, true);
-  sc->string_ci_lt_symbol =          defun("string-ci<?",	strings_are_ci_less,	2, 0, true);
-  sc->string_ci_gt_symbol =          defun("string-ci>?",	strings_are_ci_greater, 2, 0, true);
-  sc->string_ci_leq_symbol =         defun("string-ci<=?",	strings_are_ci_leq,	2, 0, true);
-  sc->string_ci_geq_symbol =         defun("string-ci>=?",	strings_are_ci_geq,	2, 0, true);
-  sc->string_fill_symbol =           defun("string-fill!",	string_fill,		2, 2, false);
-  sc->list_to_string_symbol =        defun("list->string",	list_to_string,		1, 0, false);
-  sc->string_length_symbol =         defun("string-length",	string_length,		1, 0, false);
-  sc->string_to_list_symbol =        defun("string->list",	string_to_list,		1, 2, false);
-#endif
-  sc->string_copy_symbol =           defun("string-copy",	string_copy,		1, 3, false);
-
-  sc->string_downcase_symbol =       defun("string-downcase",	string_downcase,	1, 0, false);
-  sc->string_upcase_symbol =         defun("string-upcase",	string_upcase,		1, 0, false);
-  sc->string_append_symbol =         defun("string-append",	string_append,		0, 0, true);
-  sc->substring_symbol =             defun("substring",	        substring,		2, 1, false);
-  sc->string_symbol =                defun("string",		string,			0, 0, true);
-  sc->object_to_string_symbol =      defun("object->string",	object_to_string,	1, 2, false);
-  sc->format_symbol =                defun("format",		format,			2, 0, true);
-  sc->object_to_let_symbol =         defun("object->let",	object_to_let,	        1, 0, false);
-
-  sc->cons_symbol =                  defun("cons",		cons,			2, 0, false);
-  sc->car_symbol =                   defun("car",		car,			1, 0, false);
-  sc->cdr_symbol =                   defun("cdr",		cdr,			1, 0, false);
-  sc->set_car_symbol =               defun("set-car!",		set_car,		2, 0, false);
-  sc->set_cdr_symbol =               defun("set-cdr!",	        set_cdr,		2, 0, false);
-  sc->caar_symbol =                  defun("caar",		caar,			1, 0, false);
-  sc->cadr_symbol =                  defun("cadr",		cadr,			1, 0, false);
-  sc->cdar_symbol =                  defun("cdar",		cdar,			1, 0, false);
-  sc->cddr_symbol =                  defun("cddr",		cddr,			1, 0, false);
-  sc->caaar_symbol =                 defun("caaar",		caaar,			1, 0, false);
-  sc->caadr_symbol =                 defun("caadr",		caadr,			1, 0, false);
-  sc->cadar_symbol =                 defun("cadar",		cadar,			1, 0, false);
-  sc->cdaar_symbol =                 defun("cdaar",		cdaar,			1, 0, false);
-  sc->caddr_symbol =                 defun("caddr",		caddr,			1, 0, false);
-  sc->cdddr_symbol =                 defun("cdddr",		cdddr,			1, 0, false);
-  sc->cdadr_symbol =                 defun("cdadr",		cdadr,			1, 0, false);
-  sc->cddar_symbol =                 defun("cddar",		cddar,			1, 0, false);
-  sc->caaaar_symbol =                defun("caaaar",		caaaar,			1, 0, false);
-  sc->caaadr_symbol =                defun("caaadr",		caaadr,			1, 0, false);
-  sc->caadar_symbol =                defun("caadar",		caadar,			1, 0, false);
-  sc->cadaar_symbol =                defun("cadaar",		cadaar,			1, 0, false);
-  sc->caaddr_symbol =                defun("caaddr",		caaddr,			1, 0, false);
-  sc->cadddr_symbol =                defun("cadddr",		cadddr,			1, 0, false);
-  sc->cadadr_symbol =                defun("cadadr",		cadadr,			1, 0, false);
-  sc->caddar_symbol =                defun("caddar",		caddar,			1, 0, false);
-  sc->cdaaar_symbol =                defun("cdaaar",		cdaaar,			1, 0, false);
-  sc->cdaadr_symbol =                defun("cdaadr",		cdaadr,			1, 0, false);
-  sc->cdadar_symbol =                defun("cdadar",		cdadar,			1, 0, false);
-  sc->cddaar_symbol =                defun("cddaar",		cddaar,			1, 0, false);
-  sc->cdaddr_symbol =                defun("cdaddr",		cdaddr,			1, 0, false);
-  sc->cddddr_symbol =                defun("cddddr",		cddddr,			1, 0, false);
-  sc->cddadr_symbol =                defun("cddadr",		cddadr,			1, 0, false);
-  sc->cdddar_symbol =                defun("cdddar",		cdddar,			1, 0, false);
-
-  sc->assq_symbol =                  defun("assq",		assq,			2, 0, false);
-  sc->assv_symbol =                  defun("assv",		assv,			2, 0, false);
-  sc->assoc_symbol =                 semisafe_defun("assoc",	assoc,			2, 1, false);
-  sc->memq_symbol =                  defun("memq",		memq,			2, 0, false);
-  sc->memv_symbol =                  defun("memv",		memv,			2, 0, false);
-  sc->member_symbol =                semisafe_defun("member",	member,			2, 1, false);
-
-  sc->list_symbol =                  defun("list",		list,			0, 0, true);
-  sc->list_ref_symbol =              defun("list-ref",		list_ref,		2, 0, true);
-  sc->list_set_symbol =              defun("list-set!",	        list_set,		3, 0, true);
-  sc->list_tail_symbol =             defun("list-tail",	        list_tail,		2, 0, false);
-  sc->make_list_symbol =             defun("make-list",  	make_list,		1, 1, false);
-
-  sc->length_symbol =                defun("length",		length,			1, 0, false);
-  sc->copy_symbol =                  defun("copy",		copy,			1, 3, false);
+  sc->char_ci_eq_symbol =            defun("char-ci=?",                chars_are_ci_equal,        2, 0, true);
+  sc->char_ci_lt_symbol =            defun("char-ci<?",                chars_are_ci_less,        2, 0, true);
+  sc->char_ci_gt_symbol =            defun("char-ci>?",                chars_are_ci_greater,        2, 0, true);
+  sc->char_ci_leq_symbol =           defun("char-ci<=?",        chars_are_ci_leq,        2, 0, true);
+  sc->char_ci_geq_symbol =           defun("char-ci>=?",        chars_are_ci_geq,        2, 0, true);
+  sc->string_ci_eq_symbol =          defun("string-ci=?",        strings_are_ci_equal,        2, 0, true);
+  sc->string_ci_lt_symbol =          defun("string-ci<?",        strings_are_ci_less,        2, 0, true);
+  sc->string_ci_gt_symbol =          defun("string-ci>?",        strings_are_ci_greater, 2, 0, true);
+  sc->string_ci_leq_symbol =         defun("string-ci<=?",        strings_are_ci_leq,        2, 0, true);
+  sc->string_ci_geq_symbol =         defun("string-ci>=?",        strings_are_ci_geq,        2, 0, true);
+  sc->string_fill_symbol =           defun("string-fill!",        string_fill,                2, 2, false);
+  sc->list_to_string_symbol =        defun("list->string",        list_to_string,                1, 0, false);
+  sc->string_length_symbol =         defun("string-length",        string_length,                1, 0, false);
+  sc->string_to_list_symbol =        defun("string->list",        string_to_list,                1, 2, false);
+#endif
+  sc->string_copy_symbol =           defun("string-copy",        string_copy,                1, 3, false);
+
+  sc->string_downcase_symbol =       defun("string-downcase",        string_downcase,        1, 0, false);
+  sc->string_upcase_symbol =         defun("string-upcase",        string_upcase,                1, 0, false);
+  sc->string_append_symbol =         defun("string-append",        string_append,                0, 0, true);
+  sc->substring_symbol =             defun("substring",                substring,                2, 1, false);
+  sc->string_symbol =                defun("string",                string,                        0, 0, true);
+  sc->object_to_string_symbol =      defun("object->string",        object_to_string,        1, 2, false);
+  sc->format_symbol =                defun("format",                format,                        2, 0, true);
+  sc->object_to_let_symbol =         defun("object->let",        object_to_let,                1, 0, false);
+
+  sc->cons_symbol =                  defun("cons",                cons,                        2, 0, false);
+  sc->car_symbol =                   defun("car",                car,                        1, 0, false);
+  sc->cdr_symbol =                   defun("cdr",                cdr,                        1, 0, false);
+  sc->set_car_symbol =               defun("set-car!",                set_car,                2, 0, false);
+  sc->set_cdr_symbol =               defun("set-cdr!",                set_cdr,                2, 0, false);
+  sc->caar_symbol =                  defun("caar",                caar,                        1, 0, false);
+  sc->cadr_symbol =                  defun("cadr",                cadr,                        1, 0, false);
+  sc->cdar_symbol =                  defun("cdar",                cdar,                        1, 0, false);
+  sc->cddr_symbol =                  defun("cddr",                cddr,                        1, 0, false);
+  sc->caaar_symbol =                 defun("caaar",                caaar,                        1, 0, false);
+  sc->caadr_symbol =                 defun("caadr",                caadr,                        1, 0, false);
+  sc->cadar_symbol =                 defun("cadar",                cadar,                        1, 0, false);
+  sc->cdaar_symbol =                 defun("cdaar",                cdaar,                        1, 0, false);
+  sc->caddr_symbol =                 defun("caddr",                caddr,                        1, 0, false);
+  sc->cdddr_symbol =                 defun("cdddr",                cdddr,                        1, 0, false);
+  sc->cdadr_symbol =                 defun("cdadr",                cdadr,                        1, 0, false);
+  sc->cddar_symbol =                 defun("cddar",                cddar,                        1, 0, false);
+  sc->caaaar_symbol =                defun("caaaar",                caaaar,                        1, 0, false);
+  sc->caaadr_symbol =                defun("caaadr",                caaadr,                        1, 0, false);
+  sc->caadar_symbol =                defun("caadar",                caadar,                        1, 0, false);
+  sc->cadaar_symbol =                defun("cadaar",                cadaar,                        1, 0, false);
+  sc->caaddr_symbol =                defun("caaddr",                caaddr,                        1, 0, false);
+  sc->cadddr_symbol =                defun("cadddr",                cadddr,                        1, 0, false);
+  sc->cadadr_symbol =                defun("cadadr",                cadadr,                        1, 0, false);
+  sc->caddar_symbol =                defun("caddar",                caddar,                        1, 0, false);
+  sc->cdaaar_symbol =                defun("cdaaar",                cdaaar,                        1, 0, false);
+  sc->cdaadr_symbol =                defun("cdaadr",                cdaadr,                        1, 0, false);
+  sc->cdadar_symbol =                defun("cdadar",                cdadar,                        1, 0, false);
+  sc->cddaar_symbol =                defun("cddaar",                cddaar,                        1, 0, false);
+  sc->cdaddr_symbol =                defun("cdaddr",                cdaddr,                        1, 0, false);
+  sc->cddddr_symbol =                defun("cddddr",                cddddr,                        1, 0, false);
+  sc->cddadr_symbol =                defun("cddadr",                cddadr,                        1, 0, false);
+  sc->cdddar_symbol =                defun("cdddar",                cdddar,                        1, 0, false);
+
+  sc->assq_symbol =                  defun("assq",                assq,                        2, 0, false);
+  sc->assv_symbol =                  defun("assv",                assv,                        2, 0, false);
+  sc->assoc_symbol =                 semisafe_defun("assoc",        assoc,                        2, 1, false);
+  sc->memq_symbol =                  defun("memq",                memq,                        2, 0, false);
+  sc->memv_symbol =                  defun("memv",                memv,                        2, 0, false);
+  sc->member_symbol =                semisafe_defun("member",        member,                        2, 1, false);
+
+  sc->list_symbol =                  defun("list",                list,                        0, 0, true);
+  sc->list_ref_symbol =              defun("list-ref",                list_ref,                2, 0, true);
+  sc->list_set_symbol =              defun("list-set!",                list_set,                3, 0, true);
+  sc->list_tail_symbol =             defun("list-tail",                list_tail,                2, 0, false);
+  sc->make_list_symbol =             defun("make-list",          make_list,                1, 1, false);
+
+  sc->length_symbol =                defun("length",                length,                        1, 0, false);
+  sc->copy_symbol =                  defun("copy",                copy,                        1, 3, false);
   /* set_is_definer(sc->copy_symbol); */ /* (copy (inlet 'a 1) (curlet)), but this check needs to be smarter */
-  sc->fill_symbol =                  defun("fill!",		fill,			2, 2, false);
-  sc->reverse_symbol =               defun("reverse",		reverse,		1, 0, false);
-  sc->reverseb_symbol =              defun("reverse!",		reverse_in_place,	1, 0, false);
-  sc->sort_symbol =                  unsafe_defun("sort!",      sort, 	                2, 0, false); /* not semisafe! */
-  sc->append_symbol =                defun("append",		append,			0, 0, true);
+  sc->fill_symbol =                  defun("fill!",                fill,                        2, 2, false);
+  sc->reverse_symbol =               defun("reverse",                reverse,                1, 0, false);
+  sc->reverseb_symbol =              defun("reverse!",                reverse_in_place,        1, 0, false);
+  sc->sort_symbol =                  unsafe_defun("sort!",      sort,                         2, 0, false); /* not semisafe! */
+  sc->append_symbol =                defun("append",                append,                        0, 0, true);
 
 #if (!WITH_PURE_S7)
-  sc->vector_append_symbol =         defun("vector-append",	vector_append,		0, 0, true);
-  sc->list_to_vector_symbol =        defun("list->vector",	list_to_vector,		1, 0, false);
-  sc->vector_fill_symbol =           defun("vector-fill!",	vector_fill,		2, 2, false);
-  sc->vector_length_symbol =         defun("vector-length",	vector_length,		1, 0, false);
-  sc->vector_to_list_symbol =        defun("vector->list",	vector_to_list,		1, 2, false);
+  sc->vector_append_symbol =         defun("vector-append",        vector_append,                0, 0, true);
+  sc->list_to_vector_symbol =        defun("list->vector",        list_to_vector,                1, 0, false);
+  sc->vector_fill_symbol =           defun("vector-fill!",        vector_fill,                2, 2, false);
+  sc->vector_length_symbol =         defun("vector-length",        vector_length,                1, 0, false);
+  sc->vector_to_list_symbol =        defun("vector->list",        vector_to_list,                1, 2, false);
 #else
   sc->vector_append_symbol = sc->append_symbol;
   sc->vector_fill_symbol = sc->fill_symbol;
   sc->string_fill_symbol = sc->fill_symbol;
 #endif
-  sc->vector_ref_symbol =            defun("vector-ref",	vector_ref,		2, 0, true);
-  sc->vector_set_symbol =            defun("vector-set!",	vector_set,		3, 0, true);
-  sc->vector_dimension_symbol =      defun("vector-dimension",  vector_dimension,	2, 0, false);
-  sc->vector_dimensions_symbol =     defun("vector-dimensions", vector_dimensions,	1, 0, false);
-  sc->vector_rank_symbol =           defun("vector-rank",       vector_rank,	        1, 0, false);
-  sc->make_vector_symbol =           defun("make-vector",	make_vector,		1, 2, false);
-  sc->vector_symbol =                defun("vector",		vector,			0, 0, true);
+  sc->vector_ref_symbol =            defun("vector-ref",        vector_ref,                2, 0, true);
+  sc->vector_set_symbol =            defun("vector-set!",        vector_set,                3, 0, true);
+  sc->vector_dimension_symbol =      defun("vector-dimension",  vector_dimension,        2, 0, false);
+  sc->vector_dimensions_symbol =     defun("vector-dimensions", vector_dimensions,        1, 0, false);
+  sc->vector_rank_symbol =           defun("vector-rank",       vector_rank,                1, 0, false);
+  sc->make_vector_symbol =           defun("make-vector",        make_vector,                1, 2, false);
+  sc->vector_symbol =                defun("vector",                vector,                        0, 0, true);
   set_is_setter(sc->vector_symbol); /* like cons, I guess */
-  sc->vector_typer_symbol =          defun("vector-typer",      vector_typer,	        1, 0, false);
+  sc->vector_typer_symbol =          defun("vector-typer",      vector_typer,                1, 0, false);
 
-  sc->subvector_symbol =             defun("subvector",         subvector,	        1, 3, false);
+  sc->subvector_symbol =             defun("subvector",         subvector,                1, 3, false);
   sc->subvector_position_symbol =    defun("subvector-position", subvector_position,    1, 0, false);
   sc->subvector_vector_symbol =      defun("subvector-vector",  subvector_vector,       1, 0, false);
 
-  sc->float_vector_symbol =          defun("float-vector",	float_vector,		0, 0, true);
-  sc->make_float_vector_symbol =     defun("make-float-vector", make_float_vector,	1, 1, false);
-  sc->float_vector_set_symbol =      defun("float-vector-set!", float_vector_set,	3, 0, true);
-  sc->float_vector_ref_symbol =      defun("float-vector-ref",  float_vector_ref,	2, 0, true);
+  sc->float_vector_symbol =          defun("float-vector",        float_vector,                0, 0, true);
+  sc->make_float_vector_symbol =     defun("make-float-vector", make_float_vector,        1, 1, false);
+  sc->float_vector_set_symbol =      defun("float-vector-set!", float_vector_set,        3, 0, true);
+  sc->float_vector_ref_symbol =      defun("float-vector-ref",  float_vector_ref,        2, 0, true);
 
-  sc->int_vector_symbol =            defun("int-vector",	int_vector,		0, 0, true);
-  sc->make_int_vector_symbol =       defun("make-int-vector",	make_int_vector,	1, 1, false);
-  sc->int_vector_set_symbol =        defun("int-vector-set!",	int_vector_set,		3, 0, true);
-  sc->int_vector_ref_symbol =        defun("int-vector-ref",	int_vector_ref,		2, 0, true);
+  sc->int_vector_symbol =            defun("int-vector",        int_vector,                0, 0, true);
+  sc->make_int_vector_symbol =       defun("make-int-vector",        make_int_vector,        1, 1, false);
+  sc->int_vector_set_symbol =        defun("int-vector-set!",        int_vector_set,                3, 0, true);
+  sc->int_vector_ref_symbol =        defun("int-vector-ref",        int_vector_ref,                2, 0, true);
 
-  sc->byte_vector_symbol =           defun("byte-vector",	byte_vector,		0, 0, true);
-  sc->make_byte_vector_symbol =      defun("make-byte-vector",  make_byte_vector,	1, 1, false);
-  sc->byte_vector_ref_symbol =       defun("byte-vector-ref",	byte_vector_ref,        2, 0, true);
-  sc->byte_vector_set_symbol =       defun("byte-vector-set!",	byte_vector_set,	3, 0, true);
+  sc->byte_vector_symbol =           defun("byte-vector",        byte_vector,                0, 0, true);
+  sc->make_byte_vector_symbol =      defun("make-byte-vector",  make_byte_vector,        1, 1, false);
+  sc->byte_vector_ref_symbol =       defun("byte-vector-ref",        byte_vector_ref,        2, 0, true);
+  sc->byte_vector_set_symbol =       defun("byte-vector-set!",        byte_vector_set,        3, 0, true);
   sc->string_to_byte_vector_symbol = defun("string->byte-vector", string_to_byte_vector, 1, 0, false);
   sc->byte_vector_to_string_symbol = defun("byte-vector->string", byte_vector_to_string, 1, 0, false);
 
-  sc->hash_table_symbol =            defun("hash-table",	hash_table,		0, 0, true);
-  sc->make_hash_table_symbol =       defun("make-hash-table",	make_hash_table,	0, 3, false);
+  sc->hash_table_symbol =            defun("hash-table",        hash_table,                0, 0, true);
+  sc->make_hash_table_symbol =       defun("make-hash-table",        make_hash_table,        0, 3, false);
   sc->make_weak_hash_table_symbol =  defun("make-weak-hash-table", make_weak_hash_table,0, 3, false);
   sc->weak_hash_table_symbol =       defun("weak-hash-table",   weak_hash_table,        0, 0, true);
-  sc->hash_table_ref_symbol =        defun("hash-table-ref",	hash_table_ref,		2, 0, true);
-  sc->hash_table_set_symbol =        defun("hash-table-set!",	hash_table_set,		3, 0, false);
-  sc->hash_table_entries_symbol =    defun("hash-table-entries", hash_table_entries,	1, 0, false);
+  sc->hash_table_ref_symbol =        defun("hash-table-ref",        hash_table_ref,                2, 0, true);
+  sc->hash_table_set_symbol =        defun("hash-table-set!",        hash_table_set,                3, 0, false);
+  sc->hash_table_entries_symbol =    defun("hash-table-entries", hash_table_entries,        1, 0, false);
   sc->hash_code_symbol =             defun("hash-code",         hash_code,              1, 1, false);
   sc->dummy_equal_hash_table = make_dummy_hash_table(sc);
   sc->hash_table_key_typer_symbol =  defun("hash-table-key-typer", hash_table_key_typer, 1, 0, false);
   sc->hash_table_value_typer_symbol = defun("hash-table-value-typer", hash_table_value_typer, 1, 0, false);
 
-  sc->cyclic_sequences_symbol =      defun("cyclic-sequences",  cyclic_sequences,	1, 0, false);
-  sc->call_cc_symbol =               semisafe_defun("call/cc",	call_cc,		1, 0, false);
+  sc->cyclic_sequences_symbol =      defun("cyclic-sequences",  cyclic_sequences,        1, 0, false);
+  sc->call_cc_symbol =               semisafe_defun("call/cc",        call_cc,                1, 0, false);
   sc->call_with_current_continuation_symbol = semisafe_defun("call-with-current-continuation", call_cc, 1, 0, false);
   sc->call_with_exit_symbol =        semisafe_defun("call-with-exit", call_with_exit,     1, 0, false);
 
-  sc->load_symbol =                  semisafe_defun("load",	load,			1, 1, false);
-  sc->autoload_symbol =              defun("autoload",	        autoload,		2, 0, false);
-  sc->eval_symbol =                  semisafe_defun("eval",	eval,			1, 1, false);
+  sc->load_symbol =                  semisafe_defun("load",        load,                        1, 1, false);
+  sc->autoload_symbol =              defun("autoload",                autoload,                2, 0, false);
+  sc->eval_symbol =                  semisafe_defun("eval",        eval,                        1, 1, false);
   set_func_is_definer(sc->eval_symbol);
-  sc->eval_string_symbol =           semisafe_defun("eval-string", eval_string,		1, 1, false);
+  sc->eval_string_symbol =           semisafe_defun("eval-string", eval_string,                1, 1, false);
   set_func_is_definer(sc->eval_string_symbol);
-  sc->apply_symbol =                 unsafe_defun("apply",    apply,			1, 0, true); /* not semisafe */
+  sc->apply_symbol =                 unsafe_defun("apply",    apply,                        1, 0, true); /* not semisafe */
   set_func_is_definer(sc->apply_symbol);
   /* yow... (apply (inlet) (f)) in do body where (f) returns '(define...) -- see s7test.scm under apply
    *   perhaps better: if closure returns a definer in some way set its name as a definer? even this is not fool-proof
    */
 
-  sc->for_each_symbol =              semisafe_defun("for-each",	for_each,		2, 0, true);
-  sc->map_symbol =                   semisafe_defun("map",	map,			2, 0, true);
+  sc->for_each_symbol =              semisafe_defun("for-each",        for_each,                2, 0, true);
+  sc->map_symbol =                   semisafe_defun("map",        map,                        2, 0, true);
   sc->dynamic_wind_symbol =          semisafe_defun("dynamic-wind", dynamic_wind,       3, 0, false);
   sc->dynamic_unwind_symbol =        semisafe_defun("dynamic-unwind", dynamic_unwind,   2, 0, false);
-  sc->catch_symbol =                 semisafe_defun("catch",	catch,			3, 0, false);
-  sc->throw_symbol =                 unsafe_defun("throw",	throw,			1, 0, true);
-  sc->error_symbol =                 unsafe_defun("error",	error,			1, 0, true); /* was 0,0 -- 1-Aug-22 */
+  sc->catch_symbol =                 semisafe_defun("catch",        catch,                        3, 0, false);
+  sc->throw_symbol =                 unsafe_defun("throw",        throw,                        1, 0, true);
+  sc->error_symbol =                 unsafe_defun("error",        error,                        1, 0, true); /* was 0,0 -- 1-Aug-22 */
   /* unsafe example: catch if macro as error handler, (define-macro (m . args) `(apply ,(car args) ',(cadr args))) (catch #t (lambda () (error abs -1)) m) */
-  sc->stacktrace_symbol =            defun("stacktrace",	stacktrace,		0, 5, false);
+  sc->stacktrace_symbol =            defun("stacktrace",        stacktrace,                0, 5, false);
 
-  /* sc->values_symbol = */          unsafe_defun("values",	values,			0, 0, true); /* values_symbol set above for signatures, not semisafe! */
+  /* sc->values_symbol = */          unsafe_defun("values",        values,                        0, 0, true); /* values_symbol set above for signatures, not semisafe! */
   /* set_immutable(c_function_setter(global_value(sc->values_symbol))); */ /* not needed, I think */
 
   /* quasiquote helper funcs */
@@ -97117,7 +97117,7 @@ static void init_rootlet(s7_scheme *sc)
 #else
   sc->unquote_symbol =               make_symbol(sc, "unquote", 7);
 #endif
-  sc->qq_append_symbol =             defun("<list*>",           qq_append,		2, 0, false); /* occurs via quasiquote only as #_<list*> */
+  sc->qq_append_symbol =             defun("<list*>",           qq_append,                2, 0, false); /* occurs via quasiquote only as #_<list*> */
 #if (!DISABLE_DEPRECATED)
   defun("[list*]", qq_append, 2, 0, false);
 #endif
@@ -97125,29 +97125,29 @@ static void init_rootlet(s7_scheme *sc)
   sc->list_values_symbol =           defun("list-values",       list_values,            0, 0, true);
 
   sc->documentation_symbol =         defun("documentation",     documentation,          1, 0, false);
-  sc->signature_symbol =             defun("signature",         signature,	        1, 0, false);
-  sc->help_symbol =                  defun("help",		help,			1, 0, false);
-  sc->procedure_source_symbol =      defun("procedure-source",  procedure_source,	1, 0, false);
-  sc->funclet_symbol =               defun("funclet",		funclet,		1, 0, false);
-  sc->_function__symbol =            defun("*function*",        function,	        0, 2, false);
+  sc->signature_symbol =             defun("signature",         signature,                1, 0, false);
+  sc->help_symbol =                  defun("help",                help,                        1, 0, false);
+  sc->procedure_source_symbol =      defun("procedure-source",  procedure_source,        1, 0, false);
+  sc->funclet_symbol =               defun("funclet",                funclet,                1, 0, false);
+  sc->_function__symbol =            defun("*function*",        function,                0, 2, false);
   sc->dilambda_symbol =              defun("dilambda",          dilambda,               2, 0, false);
   {
     s7_pointer get_func;
     get_func = s7_typed_dilambda(sc, "setter", g_setter, 1, 1, g_set_setter, 2, 1, H_setter, Q_setter, NULL);
     set_immutable(c_function_setter(get_func));
   }
-  sc->arity_symbol =                 defun("arity",		arity,			1, 0, false);
-  sc->is_aritable_symbol =           defun("aritable?",	        is_aritable,		2, 0, false);
+  sc->arity_symbol =                 defun("arity",                arity,                        1, 0, false);
+  sc->is_aritable_symbol =           defun("aritable?",                is_aritable,                2, 0, false);
 
-  sc->is_eq_symbol =                 defun("eq?",		is_eq,			2, 0, false);
-  sc->is_eqv_symbol =                defun("eqv?",		is_eqv,			2, 0, false);
-  sc->is_equal_symbol =              defun("equal?",		is_equal,		2, 0, false);
-  sc->is_equivalent_symbol =         defun("equivalent?",	is_equivalent,	2, 0, false);
-  sc->type_of_symbol =               defun("type-of",		type_of,		1, 0, false);
+  sc->is_eq_symbol =                 defun("eq?",                is_eq,                        2, 0, false);
+  sc->is_eqv_symbol =                defun("eqv?",                is_eqv,                        2, 0, false);
+  sc->is_equal_symbol =              defun("equal?",                is_equal,                2, 0, false);
+  sc->is_equivalent_symbol =         defun("equivalent?",        is_equivalent,        2, 0, false);
+  sc->type_of_symbol =               defun("type-of",                type_of,                1, 0, false);
 
-  sc->gc_symbol =                    semisafe_defun("gc",	gc,			0, 1, false);
-                                     defun("emergency-exit",	emergency_exit,		0, 1, false);
-  sc->exit_symbol =                  defun("exit",		exit,			0, 1, false);
+  sc->gc_symbol =                    semisafe_defun("gc",        gc,                        0, 1, false);
+                                     defun("emergency-exit",        emergency_exit,                0, 1, false);
+  sc->exit_symbol =                  defun("exit",                exit,                        0, 1, false);
 
 #if WITH_GCC
   s7_define_function(sc, "abort", g_abort, 0, 0, false, "drop into gdb I hope");
@@ -97207,7 +97207,7 @@ static void init_rootlet(s7_scheme *sc)
 
   /* -------- *load-path* -------- */
   sc->load_path_symbol = s7_define_variable_with_documentation(sc, "*load-path*", sc->nil, /* list_1(sc, make_string_with_length(sc, ".", 1)), */ /* not plist! */
-			   "*load-path* is a list of directories (strings) that the load function searches if it is passed an incomplete file name");
+                           "*load-path* is a list of directories (strings) that the load function searches if it is passed an incomplete file name");
   s7_set_setter(sc, sc->load_path_symbol, s7_make_safe_function(sc, "#<set-*load-path*>", g_load_path_set, 2, 0, false, "*load-path* setter"));
 
 #ifdef CLOAD_DIR
@@ -97217,7 +97217,7 @@ static void init_rootlet(s7_scheme *sc)
   sc->cload_directory_symbol = s7_define_variable(sc, "*cload-directory*", nil_string);
 #endif
   s7_set_setter(sc, sc->cload_directory_symbol,
-		s7_make_safe_function(sc, "#<set-*cload-directory*>", g_cload_directory_set, 2, 0, false, "*cload-directory* setter"));
+                s7_make_safe_function(sc, "#<set-*cload-directory*>", g_cload_directory_set, 2, 0, false, "*cload-directory* setter"));
 
   /* -------- *autoload* -------- this pretends to be a hash-table or environment, but it's actually a function */
   sc->autoloader_symbol = s7_define_typed_function(sc, "*autoload*", g_autoloader, 1, 0, false, H_autoloader, Q_autoloader);
@@ -97458,19 +97458,19 @@ s7_scheme *s7_init(void)
     add_saved_pointer(sc, (void *)cells);
     for (i = 0; i < INITIAL_HEAP_SIZE; i++)       /* LOOP_4 here is slower! */
       {
-	sc->heap[i] = &cells[i];
- 	sc->free_heap[i] = sc->heap[i];
+        sc->heap[i] = &cells[i];
+         sc->free_heap[i] = sc->heap[i];
 #if S7_DEBUGGING
-	sc->heap[i]->debugger_bits = 0; sc->heap[i]->gc_line = 0; sc->heap[i]->gc_func = NULL;
+        sc->heap[i]->debugger_bits = 0; sc->heap[i]->gc_line = 0; sc->heap[i]->gc_func = NULL;
 #endif
-	clear_type(sc->heap[i]);                  /* type(sc->heap[i]) = T_FREE */
-	i++;
-	sc->heap[i] = &cells[i];
- 	sc->free_heap[i] = sc->heap[i];
+        clear_type(sc->heap[i]);                  /* type(sc->heap[i]) = T_FREE */
+        i++;
+        sc->heap[i] = &cells[i];
+         sc->free_heap[i] = sc->heap[i];
 #if S7_DEBUGGING
-	sc->heap[i]->debugger_bits = 0; sc->heap[i]->gc_line = 0; sc->heap[i]->gc_func = NULL;
+        sc->heap[i]->debugger_bits = 0; sc->heap[i]->gc_line = 0; sc->heap[i]->gc_func = NULL;
 #endif
-	clear_type(sc->heap[i]);
+        clear_type(sc->heap[i]);
      }
     /* memcpy((void *)(sc->free_heap), (const void *)(sc->heap), sizeof(s7_pointer) * INITIAL_HEAP_SIZE); */
     /*   weird that this memcpy (without the equivalent sets above) is much slower */
@@ -97542,9 +97542,9 @@ s7_scheme *s7_init(void)
     add_saved_pointer(sc, os);
     for (i = 0; i < OPTS_SIZE; i++)
       {
-	opt_info *o = &os[i];
-	sc->opts[i] = o;
-	o->sc = sc;
+        opt_info *o = &os[i];
+        sc->opts[i] = o;
+        o->sc = sc;
       }}
 
   for (i = 0; i < NUM_TYPES; i++)
@@ -97736,7 +97736,7 @@ s7_scheme *s7_init(void)
                                 ((funclet hook) 'body))                                                   \n\
                               (lambda (hook lst)                                                          \n\
                                 (when (or (not (procedure? hook)) (continuation? hook) (goto? hook))      \n\
-		                  (error 'wrong-type-arg \"hook-functions hook must be a procedure created by make-hook: ~S\" hook)) \n\
+                                  (error 'wrong-type-arg \"hook-functions hook must be a procedure created by make-hook: ~S\" hook)) \n\
                                 (if (do ((p lst (cdr p)))                                                 \n\
                                         ((not (and (pair? p)                                              \n\
                                                    (procedure? (car p))                                   \n\
@@ -97748,37 +97748,37 @@ s7_scheme *s7_init(void)
   /* -------- *unbound-variable-hook* -------- */
   sc->unbound_variable_hook = s7_eval_c_string(sc, "(make-hook 'variable)");
   s7_define_constant_with_documentation(sc, "*unbound-variable-hook*", sc->unbound_variable_hook,
-					"*unbound-variable-hook* functions are called when an unbound variable is encountered, passed (hook 'variable).");
+                                        "*unbound-variable-hook* functions are called when an unbound variable is encountered, passed (hook 'variable).");
 
   /* -------- *missing-close-paren-hook* -------- */
   sc->missing_close_paren_hook = s7_eval_c_string(sc, "(make-hook)");
   s7_define_constant_with_documentation(sc, "*missing-close-paren-hook*", sc->missing_close_paren_hook,
-					"*missing-close-paren-hook* functions are called when the reader thinks a close paren is missing");
+                                        "*missing-close-paren-hook* functions are called when the reader thinks a close paren is missing");
 
   /* -------- *load-hook* -------- */
   sc->load_hook = s7_eval_c_string(sc, "(make-hook 'name)");
   s7_define_constant_with_documentation(sc, "*load-hook*", sc->load_hook,
-					"*load-hook* functions are invoked by load, passing the to-be-loaded filename as (hook 'name)");
+                                        "*load-hook* functions are invoked by load, passing the to-be-loaded filename as (hook 'name)");
 
   /* -------- *autoload-hook* -------- */
   sc->autoload_hook = s7_eval_c_string(sc, "(make-hook 'name 'file)");
   s7_define_constant_with_documentation(sc, "*autoload-hook*", sc->autoload_hook,
-					"*autoload-hook* functions are invoked by autoload, passing the to-be-autoloaded filename as (hook 'name) and (hook 'file))");
+                                        "*autoload-hook* functions are invoked by autoload, passing the to-be-autoloaded filename as (hook 'name) and (hook 'file))");
 
   /* -------- *error-hook* -------- */
   sc->error_hook = s7_eval_c_string(sc, "(make-hook 'type 'data)");
   s7_define_constant_with_documentation(sc, "*error-hook*", sc->error_hook,
-					"*error-hook* functions are called in the error handler, passed (hook 'type) and (hook 'data).");
+                                        "*error-hook* functions are called in the error handler, passed (hook 'type) and (hook 'data).");
 
   /* -------- *read-error-hook* -------- */
   sc->read_error_hook = s7_eval_c_string(sc, "(make-hook 'type 'data)");
   s7_define_constant_with_documentation(sc, "*read-error-hook*", sc->read_error_hook,
-					"*read-error-hook* functions are called by the reader if it is unhappy, passing the current program string as (hook 'data).");
+                                        "*read-error-hook* functions are called by the reader if it is unhappy, passing the current program string as (hook 'data).");
 
   /* -------- *rootlet-redefinition-hook* -------- */
   sc->rootlet_redefinition_hook = s7_eval_c_string(sc, "(make-hook 'name 'value)");
   s7_define_constant_with_documentation(sc, "*rootlet-redefinition-hook*", sc->rootlet_redefinition_hook,
-					"*rootlet-redefinition-hook* functions are called when a top-level variable's value is changed, (hook 'name 'value).");
+                                        "*rootlet-redefinition-hook* functions are called when a top-level variable's value is changed, (hook 'name 'value).");
 
   sc->let_temp_hook = s7_eval_c_string(sc, "(make-hook 'type 'data)");
 
@@ -97791,7 +97791,7 @@ s7_scheme *s7_init(void)
                                 (lambda (clause)                                                          \n\
                                   (if (not (pair? clause))                                                \n\
                                       (error 'syntax-error \"reader-cond: clause is not a pair, ~S\" clause)) \n\
-	                          (let ((val (eval (car clause))))                                        \n\
+                                  (let ((val (eval (car clause))))                                        \n\
                                     (when val                                                             \n\
                                       (return                                                             \n\
                                         (cond ((null? (cdr clause)) val)                                  \n\
@@ -97823,17 +97823,17 @@ s7_scheme *s7_init(void)
                           (if (null? clauses)                                                             \n\
                               (error 'syntax-error \"cond-expand: no clauses?\"))                         \n\
                           (letrec ((traverse (lambda (tree)                                               \n\
-		                               (if (pair? tree)                                           \n\
-			                           (cons (traverse (car tree))                            \n\
-				                         (case (cdr tree) ((())) (else => traverse)))     \n\
-			                           (if (memq tree '(and or not else)) tree                \n\
-			                               (and (symbol? tree) (provided? tree)))))))         \n\
+                                               (if (pair? tree)                                           \n\
+                                                   (cons (traverse (car tree))                            \n\
+                                                         (case (cdr tree) ((())) (else => traverse)))     \n\
+                                                   (if (memq tree '(and or not else)) tree                \n\
+                                                       (and (symbol? tree) (provided? tree)))))))         \n\
                             (cons 'cond (map (lambda (clause)                                             \n\
-		                               (if (pair? clause)                                         \n\
+                                               (if (pair? clause)                                         \n\
                                                    (cons (traverse (car clause))                          \n\
-			                                 (case (cdr clause) ((()) '(#f)) (else)))         \n\
+                                                         (case (cdr clause) ((()) '(#f)) (else)))         \n\
                                                    (error 'syntax-error \"cond-expand: clause is not a pair, ~S\" clause))) \n\
-		                             clauses))))");
+                                             clauses))))");
   /* cond-expand should expand into an expansion (or inline macro?) so that if there's no else clause, we can add (else (values))
    *   r7rs says: "If none of the <feature requirement>s evaluate to #t, then if there is an else clause, its <expression>s are included.
    *   Otherwise, the cond-expand has no effect."  The code above returns #<unspecified>, but I read that prose to say that
@@ -97911,18 +97911,18 @@ void s7_free(s7_scheme *sc)
   for (i = 0; i < gp->loc; i++)
     {
       if ((unchecked_port_data_block(gp->list[i])) &&
-	  (block_index(unchecked_port_data_block(gp->list[i])) == TOP_BLOCK_LIST))
-	free(block_data(unchecked_port_data_block(gp->list[i])));   /* the file contents, port_block is other stuff */
+          (block_index(unchecked_port_data_block(gp->list[i])) == TOP_BLOCK_LIST))
+        free(block_data(unchecked_port_data_block(gp->list[i])));   /* the file contents, port_block is other stuff */
       if ((is_file_port(gp->list[i])) &&
-	  (!port_is_closed(gp->list[i])))
-	fclose(port_file(gp->list[i]));
+          (!port_is_closed(gp->list[i])))
+        fclose(port_file(gp->list[i]));
     }
   gc_list_free(gp);
 
   gp = sc->input_ports;
   for (i = 0; i < gp->loc; i++)
     if ((unchecked_port_data_block(gp->list[i])) &&
-	(block_index(unchecked_port_data_block(gp->list[i])) == TOP_BLOCK_LIST))
+        (block_index(unchecked_port_data_block(gp->list[i])) == TOP_BLOCK_LIST))
       free(block_data(unchecked_port_data_block(gp->list[i])));    /* the file contents, port_block is other stuff */
   gc_list_free(gp);
   gc_list_free(sc->input_string_ports); /* port_data_block is null, port_block is the const char* data, so I assume it is handled elsewhere */
@@ -97993,7 +97993,7 @@ void s7_free(s7_scheme *sc)
   if (sc->autoloaded_already)
     {
       for (i = 0; i < sc->autoload_names_loc; i++)
-	if (sc->autoloaded_already[i]) free(sc->autoloaded_already[i]);
+        if (sc->autoloaded_already[i]) free(sc->autoloaded_already[i]);
       free(sc->autoloaded_already);
     }
   for (block_t *top = sc->block_lists[TOP_BLOCK_LIST]; top; top = block_next(top))
@@ -98034,9 +98034,9 @@ void s7_free(s7_scheme *sc)
   for (i = 0; i < sc->num_fdats; i++)
     if (sc->fdats[i])                 /* init val is NULL */
       {
-	if (sc->fdats[i]->curly_str)
-	  free(sc->fdats[i]->curly_str);
-	free(sc->fdats[i]);
+        if (sc->fdats[i]->curly_str)
+          free(sc->fdats[i]->curly_str);
+        free(sc->fdats[i]);
       }
   free(sc->fdats);
 
@@ -98053,11 +98053,11 @@ void s7_free(s7_scheme *sc)
   if (sc->c_object_types)
     {
       for (i = 0; i < sc->num_c_object_types; i++)
-	{
-	  c_object_t *c_type = sc->c_object_types[i];
-	  if (c_type->scheme_name) {free(c_type->scheme_name); c_type->scheme_name = NULL;}
-	  free(c_type);
-	}
+        {
+          c_object_t *c_type = sc->c_object_types[i];
+          if (c_type->scheme_name) {free(c_type->scheme_name); c_type->scheme_name = NULL;}
+          free(c_type);
+        }
       free(sc->c_object_types);
     }
   free(sc);
@@ -98085,11 +98085,11 @@ static void dumb_repl(s7_scheme *sc)
       fprintf(stdout, "\n> ");
       if (!fgets(buffer, 512, stdin)) break;  /* error or ctrl-D */
       if (((buffer[0] != '\n') || (strlen(buffer) > 1)))
-	{
-	  char response[1024];
-	  snprintf(response, 1024, "(write %s)", buffer);
-	  s7_eval_c_string(sc, response);
-	}}
+        {
+          char response[1024];
+          snprintf(response, 1024, "(write %s)", buffer);
+          s7_eval_c_string(sc, response);
+        }}
   fprintf(stdout, "\n");
   if (ferror(stdin))
     fprintf(stderr, "read error on stdin\n");
@@ -98178,10 +98178,10 @@ int main(int argc, char **argv)
     {
       fprintf(stderr, "load %s\n", argv[1]);
       if (!s7_load(sc, argv[1]))
-	{
-	  fprintf(stderr, "can't load %s\n", argv[1]);
-	  return(2);
-	}}
+        {
+          fprintf(stderr, "can't load %s\n", argv[1]);
+          return(2);
+        }}
   else
     {
 #if (MS_WINDOWS) || (!WITH_C_LOADER) || ((defined(__linux__)) && (!defined(__GLIBC__))) /* musl? */
@@ -98192,10 +98192,10 @@ int main(int argc, char **argv)
 #else
       char *dir = realdir(argv[0]);
       if (dir)
-	{
-	  s7_add_to_load_path(sc, dir);
-	  free(dir);
-	}
+        {
+          s7_add_to_load_path(sc, dir);
+          free(dir);
+        }
 #endif
       s7_repl(sc);
 #endif