RE: C-h k does not work with M-o

[Drew Adams]

>     > When I do C-h k M-o I see a line beginning with Set face:
> 
>     M-o is a prefix key. ...
> 
> That is correct.  It would be nice if describe-key (`C-h k') provided
> an error message (after a suitable and adjustable time out) for this.
> This would help the novices and the foolish, but not anyone else.  (I
> do not have time to propose a fix.)

Do you mean something like this?

(message "`%s' is a prefix key; type another key"
         (this-command-keys))
(sit-for 2)