Tweak regexp in help-mode-finish

Without this fix, "This special-form is advised." won't be correctly
fontified.

lisp/ChangeLog

+2011-03-23  Leo Liu  <sdl.web@gmail.com>
+
+	* help-mode.el (help-mode-finish): Tweak regexp.
+
 2011-03-23  Glenn Morris  <rgm@gnu.org>
 	* eshell/esh-opt.el (eshell-eval-using-options):

lisp/help-mode.el

@@ -330,7 +330,7 @@ Commands:
     (save-excursion
       (goto-char (point-min))
       (let ((inhibit-read-only t))
-	(when (re-search-forward "^This \\w+ is advised.$" nil t)
+	(when (re-search-forward "^This [^[:space:]]+ is advised.$" nil t)
 	  (put-text-property (match-beginning 0)
 			     (match-end 0)
 			     'face 'font-lock-warning-face))))