>
> LGTM, thanks.  Did you test this with minibuffer-only frames?
>

Thanks.  Here is the updated patch.  I tested it with minibuffer-only 
frames, and it seems to work.

Are you sure that it's okay to rebind M-c in 
minibuffer-local-completion-map?  It's a good mnemonic for "completion", 
but it hides the capitalize-word binding, that users might possibly want 
to use there (I don't, it's only when thinking about this patch that I 
realized this).

Another option would be M-g, which would not hide anything that is 
possibly useful in the minibuffer, and is still a mnemonic of "goto".