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, 2 insertions, 2 deletions

diff --git a/src/keymap.c b/src/keymap.c
index d10c00489d1..e9898051dc7 100644
--- a/src/keymap.c
+++ b/src/keymap.c
@@ -498,7 +498,7 @@ access_keymap_1 (Lisp_Object map, Lisp_Object idx,
             if (INTEGERP (idx) && (XFASTINT (idx) & CHAR_MODIFIER_MASK) == 0)
               {
                 val = Faref (binding, idx);
-                /* `nil' has a special meaning for char-tables, so
+                /* nil has a special meaning for char-tables, so
                    we use something else to record an explicitly
                    unbound entry.  */
                 if (NILP (val))
@@ -849,7 +849,7 @@ store_in_keymap (Lisp_Object keymap, register Lisp_Object idx, Lisp_Object def)
             if (NATNUMP (idx) && !(XFASTINT (idx) & CHAR_MODIFIER_MASK))
               {
                 Faset (elt, idx,
-                       /* `nil' has a special meaning for char-tables, so
+                       /* nil has a special meaning for char-tables, so
                           we use something else to record an explicitly
                           unbound entry.  */
                        NILP (def) ? Qt : def);