(defvar mode-motion-hook nil
"Function or functions which are called whenever the mouse moves.
Each function must take a single argument of the motion event.
-You should normally use this rather than `mouse-motion-handler', which
+You should normally use this rather than `mouse-motion-handler', which
does some additional window-system-dependent things. This hook is local
to every buffer, and should normally be set up by major-modes which want
to use special highlighting. Every time the mouse moves over a window,