bug#6204: vc-dir always splits the frame

[Stefan Monnier]

>>> `switch-to-buffer' is allowed to reuse a weakly dedicated window while
>>> `display-buffer' isn't.
>> Indeed, and that's on purpose.  It's basically that switch-to-buffer has
>> a strong `same-window' parameter.  I don't think display-buffer and
>> special-display-regexps have any way to specify such a request, so we'll
>> need to add it.
> Where "add it" means to include it as argument, I presume.  Doesn't this
> mean we'd have to find a way to specify this in `special-display-regexps'
> too?

Yes.


        Stefan