Incidentally, this function looks faulty: it should search the keymap
_and_ the local-map property (in _that_ order) instead of searching at
most one of the two, even if that search would fail.

Apart from fixing it and adding an optional key argument, is help.el
the right place for it?

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum