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, 3 insertions, 3 deletions

diff --git a/lisp/ses.el b/lisp/ses.el
index 3336769270c..e625e4ed593 100644
--- a/lisp/ses.el
+++ b/lisp/ses.el
@@ -2276,7 +2276,7 @@ to are recalculated first."
     (when (and (< col (1- ses--numcols)) ;;Last column can't spill over, anyway
 	       (eq (ses-cell-value row (1+ col)) '*skip*))
       ;; This cell has spill-over.  We'll momentarily pretend the following cell
-      ;; has a `t' in it.
+      ;; has a t in it.
       (cl-progv
 	  (list (ses-cell-symbol row (1+ col)))
 	  '(t)
@@ -3528,11 +3528,11 @@ execution anyway.  Always returns t if `safe-functions' is t."
 ;;----------------------------------------------------------------------------
 
 (defun ses--clean-! (&rest x)
-  "Clean by `delq' list X from any occurrence of `nil' or `*skip*'."
+  "Clean by `delq' list X from any occurrence of nil or `*skip*'."
   (delq nil (delq '*skip* x)))
 
 (defun ses--clean-_ (x y)
-  "Clean list X  by replacing by Y any occurrence of `nil' or `*skip*'.
+  "Clean list X  by replacing by Y any occurrence of nil or `*skip*'.
 
 This will change X by making `setcar' on its cons cells."
   (let ((ret x) ret-elt)