Improve checkdoc-common-verbs-wrong-voice docstring

* lisp/emacs-lisp/checkdoc.el (checkdoc-common-verbs-wrong-voice):
Improve docstring.

(cherry picked from commit dabaea97465163c015890272c3d5001624690e08)

diff --git a/lisp/emacs-lisp/checkdoc.el b/lisp/emacs-lisp/checkdoc.el
index 16952454c4717780254175434d6973d077b716f1..aea179640cbba782cec6f6552a53e9955e526816 100644 (file)
--- a/lisp/emacs-lisp/checkdoc.el
+++ b/lisp/emacs-lisp/checkdoc.el
@@ -479,10 +479,10 @@ this to anything but t is likely to be counter-productive.")
     ("yanks" . "yank")
     )
   "Alist of common words in the wrong voice and what should be used instead.
-Set `checkdoc-verb-check-experimental-flag' to nil to avoid this costly
-and experimental check.  Do not modify this list without setting
-the value of `checkdoc-common-verbs-regexp' to nil which cause it to
-be re-created.")
+Set `checkdoc-verb-check-experimental-flag' to a non-nil value to enable
+this experimental check.  Do not modify this list without setting the
+value of `checkdoc-common-verbs-regexp' to nil, which causes it to be
+re-created.")
 
 (defvar checkdoc-syntax-table
   (let ((st (make-syntax-table emacs-lisp-mode-syntax-table)))