Further tweak previous change

2e4a0a90 · Glenn Morris · 79a15a36 · 2e4a0a90
Commit 2e4a0a90 authored Aug 31, 2013 by Glenn Morris
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lisp/frame.el lisp/frame.el +2 -1

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--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -875,7 +875,8 @@ Set this to the symbol `dark' if your background color is dark,
 if you want Emacs to examine the brightness for you.

 If you change this without using customize, you should use
-`frame-set-background-mode' to update existing frames."
+`frame-set-background-mode' to update existing frames;
+e.g. (mapc 'frame-set-background-mode (frame-list))."
  :group 'faces
  :set #'(lambda (var value)
 	   (set-default var value)