Don't quote nil and t in doc strings

This is as per "Tips for Documentation Strings" in the elisp manual.
For consistency, do the same in diagnostics and comments.

1 files changed, 4 insertions, 4 deletions

diff --git a/lisp/simple.el b/lisp/simple.el
index dfd92dcdc05..49a95aea4a8 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -3488,9 +3488,9 @@ value passed."
 (defvar process-file-side-effects t
   "Whether a call of `process-file' changes remote files.
 
-By default, this variable is always set to `t', meaning that a
+By default, this variable is always set to t, meaning that a
 call of `process-file' could potentially change any file on a
-remote host.  When set to `nil', a file handler could optimize
+remote host.  When set to nil, a file handler could optimize
 its behavior with respect to remote file attribute caching.
 
 You should only ever change this variable with a let-binding;
@@ -6675,7 +6675,7 @@ beyond `current-fill-column' automatically breaks the line at a
 previous space.
 
 When `auto-fill-mode' is on, the `auto-fill-function' variable is
-non-`nil'.
+non-nil.
 
 The value of `normal-auto-fill-function' specifies the function to use
 for `auto-fill-function' when turning Auto Fill mode on."
@@ -8232,7 +8232,7 @@ version and use the one distributed with Emacs."))
 Each element has the form (PACKAGE SYMBOL REGEXP STRING).
 PACKAGE is either a regular expression to match file names, or a
 symbol (a feature name), like for `with-eval-after-load'.
-SYMBOL is either the name of a string variable, or `t'.  Upon
+SYMBOL is either the name of a string variable, or t.  Upon
 loading PACKAGE, if SYMBOL is t or matches REGEXP, display a
 warning using STRING as the message.")