(menu-set-font): Clarify that the default will be saved

Fixes: debbugs:3527

lisp/ChangeLog

 2011-07-12  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
+	* menu-bar.el (menu-set-font): Clarify that the default will be
+	saved (bug#3527).
+
 	* progmodes/compile.el (compilation-error-regexp-alist-alist):
 	Fontise bytecomp Error lines more correctly (bug#2490).  Fix
 	suggested by Johan Bockgård.

lisp/menu-bar.el

@@ -673,7 +673,8 @@ by \"Save Options\" in Custom buffers.")
 ;; Function for setting/saving default font.
 
 (defun menu-set-font ()
-  "Interactively select a font and make it the default."
+  "Interactively select a font and make it the default.
+This new default will be saved for future Emacs sessions."
   (interactive)
   (let ((font (if (fboundp 'x-select-font)
   		  (x-select-font)