bug#32990: 26.1.50; isearch-forward + t-m-m/mark-active doc

[Eli Zaretskii]

> Date: Tue, 09 Oct 2018 20:14:34 +0200
> From: charles@aurox.ch (Charles A. Roelli)
> CC: 32990@debbugs.gnu.org
> 
> > I'd actually encourage the opposite trend: make the doc string
> > shorter, and tell users to read the manual for more details.
> 
> Ok, that would be better than duplicating all the details in both the
> function documentation and the manual.  I will prepare a patch.

Thanks!