lisp/help-fns.el (describe-variable): Fix completion.

http://lists.gnu.org/archive/html/emacs-devel/2011-04/msg00112.html

lisp/ChangeLog

+2011-04-04  Juanma Barranquero  <lekktu@gmail.com>
+
+	* help-fns.el (describe-variable): Complete all variables having
+	documentation, including keywords.
+	http://lists.gnu.org/archive/html/emacs-devel/2011-04/msg00112.html
+
 2011-04-04  Juanma Barranquero  <lekktu@gmail.com>
 	Convert to lexical-binding.

lisp/help-fns.el

@@ -635,8 +635,8 @@ it is displayed along with the global value."
 				  "Describe variable: ")
 				obarray
 				(lambda (vv)
-                                  (or (special-variable-p vv)
-                                      (get vv 'variable-documentation)))
+                                  (or (get vv 'variable-documentation)
+                                      (not (keywordp vv))))
 				t nil nil
 				(if (symbolp v) (symbol-name v))))
      (list (if (equal val "")