Alternatively, if optional fourth argument OLDMAP is specified, we redefine
in KEYMAP as NEWDEF those keys which are defined as OLDDEF in OLDMAP.
-For most uses, it is simpler and safer to use command remapping like this:
+If you don't specify OLDMAP, you can usually get the same results
+in a cleaner way with command remapping, like this:
\(define-key KEYMAP [remap OLDDEF] NEWDEF)"
;; Don't document PREFIX in the doc string because we don't want to
;; advertise it. It's meant for recursive calls only. Here's its