bug#21634: [External] : bug#21634: text-scale-adjust suggestion

[martin rudalics]

> With indent-rigidly this is even worse
> since the echo-area message disappears leaving you with no indication
> of it being active, which is essentially a mode which is extremely
> un-emacsy.

With `transient-mark-mode' the region stays highlighted until I'm done
with indenting.  I would never look anywhere else for obtaining feedback
about a transient mode like the one triggered by `indent-rigidly'.

martin