bug#32956: 26.1.50; t-m-m mark deactivation documentation

[Eli Zaretskii <eliz@gnu.org>]

> Date: Sun, 07 Oct 2018 21:42:07 +0200
> From: charles@aurox.ch (Charles A. Roelli)
> Cc: 32956@debbugs.gnu.org
> 
> FWIW, this change for emacs-26 should fix it, as well as adding an
> entry for activating the mark.
> 
> diff --git a/doc/emacs/mark.texi b/doc/emacs/mark.texi
> index 0ffa9f7..1050587 100644
> --- a/doc/emacs/mark.texi
> +++ b/doc/emacs/mark.texi
> @@ -17,11 +17,13 @@ Mark
>  changes.
>  
>  @cindex active region
> +@cindex activating the mark
>    Setting the mark at a position in the text also @dfn{activates} it.
>  When the mark is active, we say also that the region is active; Emacs
>  indicates its extent by highlighting the text within it, using the
>  @code{region} face (@pxref{Face Customization}).
>  
> +@cindex deactivating the mark
>    After certain non-motion commands, including any command that
>  changes the text in the buffer, Emacs automatically @dfn{deactivates}
>  the mark; this turns off the highlighting.  You can also explicitly

Fine with me, thanks.