bug#3717: M-x man completion

[Kevin Ryde]

Stefan Monnier <monnier@IRO.UMontreal.CA> writes:
>
> Yes, done

In the completions table I insinuate "-k " and "-l " so it's possible to
type those things without needing C-q Space.  Is there a better way to
defang `minibuffer-complete-word', ie. make it just insert a space in
certain circumstances?

(The way M-x man accepts "-k pattern" seems to be a well-kept secret --
or is it obvious to everyone except me!)