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

[Drew Adams]

> > I see no reason for such an option.  And no reason
> > for the broken default behavior that the original
> > complaint was about.
> 
> In 2012 you asked me to implement this feature, and after implementing it
> you confirmed that it has the right implementation.  Changing its
> long-standing default behavior now will cause backward-incompatibility
> in users' habits.

Really?  What feature is that?  Could you please
point me to my request for it?

Could you also please describe the user habit in
question, and the change that would break it?