bug#25208: 24.5; man output uses wrong width

[Eli Zaretskii]

> From: Olaf Dietsche <olaf--mail.bug-gnu-emacs@olafdietsche.de>
> Cc:25208@debbugs.gnu.org
> Date: Thu, 15 Dec 2016 22:31:30 +0100
> 
> This is not a general problem with line truncation. In this case it
> isn't Emacs doing the formatting, but the external program `man`. Emacs
> does so by setting the COLUMNS environment variable before calling man.
> 
> Man will then format according to the given width, which is the width of
> the current window before being split in half.

Right, so I did misunderstand.  Sorry about that.

> > But Mark says this was fixed, so maybe I don't understand the issue
> > well enough.
> 
> Whatever might have been fixed more than two years ago (#17831), it
> doesn't show up in my Emacs (24.5.1, Ubuntu 16.04).

That fix is in Emacs 25.1, not in 24.5, AFAICS.