bug#41934: reverse-region no longer works

[Richard Copley]

On Thu, 18 Jun 2020 at 19:28, Eli Zaretskii <eliz@gnu.org> wrote:
>
> > From: Richard Copley <rcopley@gmail.com>
> > Date: Thu, 18 Jun 2020 18:59:21 +0100
> > Cc: 41934@debbugs.gnu.org
> >
> > On Thu, 18 Jun 2020 at 18:52, Richard Copley <rcopley@gmail.com> wrote:
> > > On Thu, 18 Jun 2020 at 18:42, Eli Zaretskii <eliz@gnu.org> wrote:
> > > Thanks,
> > > No, that fails on this example [...]
> >
> > How's this?
>
> Looks good, but what if beg and end are on the same line (at the point
> where you added the test)?  Does that not warrant the error message?

Not that error message, no, but rather something like "There are fewer
than two lines in the region".

I don't see the point of this error at all: if there are fewer than
two lines in the region-to-be-reversed at that point, in my opinion
the command should have no effect.