Print only literal values when printing literals (#2469)

Current `<<` operator on `Literal` prints `[type].const` with it. But
`[type].const` is rather an instruction than a literal itself, and
printing it with the literals makes less sense when we later have
literals whose type don't have `const` instructions (such as reference
types).

This patch
- Makes `<<` operator on `Literal` print only its value
- Makes wasm-shell's shell interface comply with the spec interpreter's
  printing format (`value : type`).
- Prints wasm-shell's `[trap]` message to stderr

These make all `fix_` routines for spec tests in check.py unnecessary.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/wasm/literal.cpp b/src/wasm/literal.cpp
index 41d8d2924..3b2930c67 100644
--- a/src/wasm/literal.cpp
+++ b/src/wasm/literal.cpp
@@ -252,7 +252,7 @@ void Literal::printVec128(std::ostream& o, const std::array<uint8_t, 16>& v) {
 }
 
 std::ostream& operator<<(std::ostream& o, Literal literal) {
-  prepareMinorColor(o) << literal.type << ".const ";
+  prepareMinorColor(o);
   switch (literal.type) {
     case Type::none:
       o << "?";