help--binding-locus: Document argument POSITION.

* lisp/help.el (help--binding-locus): Document argument POSITION. (bug#20530)

diff --git a/lisp/help.el b/lisp/help.el
index fb1719ac9c9163cb3fd4e93b9ad21ee247288411..2b8f64231727c3bf6013c1bcafb2d5187aa4b75a 100644 (file)
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -691,7 +691,8 @@ POSITION is as documented in the function `key-binding'."
 (defun help--binding-locus (key position)
   "Describe in which keymap KEY is defined.
 Return a symbol pointing to that keymap if one exists ; otherwise
-return nil."
+return nil.  The argument POSITION is as documented in the
+function `key-binding'."
   (let ((map (help--key-binding-keymap key t nil position)))
     (when map
       (catch 'found