doc-fix to be compatible with other frame- fns.

diff --git a/lisp/frame.el b/lisp/frame.el
index ddd565602b5b3fd5e97da2813108cf279e5b1666..9ad7e261521596043f2b0b34aa40744eac5b792c 100644 (file)
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -580,8 +580,9 @@ is given and non-nil, the unwanted frames are iconified instead."
 ;;;; frame parameters.
 
 (defun frame-parameter (frame parameter)
-  "Return FRAME's value for parameter PARAMETER."
-  (cdr (assq parameter(frame-parameters frame))))
+  "Return FRAME's value for parameter PARAMETER.
+If FRAME is omitted, describe the currently selected frame."
+  (cdr (assq parameter (frame-parameters frame))))
 
 (defun frame-height (&optional frame)
   "Return number of lines available for display on FRAME.