bug#39902: 28.0.50; Marking in dired with active region

[Drew Adams]

> > And it's easy to hit `C-SPC' without realizing that you've done so -
> > there's no good visual signal (just the "Mark activated" msg).
> 
> Typing `C-x SPC' shows an indication as a thin vertical bar highlighted
> with the region face.  But `C-SPC' doesn't have the same subtle
> indication.

Yes, sorry, I meant `C-SPC'.

> > an empty region should always be ignored...
> > A better way to do it...:
> > (if (and (region-active-p)
> >          (> (region-end) (region-beginning)))
> 
> Thanks for the suggestion, now changed in master.

Glad we reached a conclusion.  Thanks to both of
you for working on this.