bug#25131: thwarted from copying what one sees in Info

[Eli Zaretskii]

> From: Marcin Borkowski <mbork@mbork.pl>
> Date: Wed, 07 Dec 2016 12:29:36 +0100
> Cc: 25131@debbugs.gnu.org
> 
> > Go to e.g.,
> > (info "(coreutils) Sorting the output")
> >
> > See that line at the top,
> > ... > ... > ... >
> > Looks good, right? Let's try to copy it with ^K.
> > As much as you try, you will only get
> > File: coreutils.info,  Node: Sorting the output...
> >
> > One needs to probably use emacs -nw in order to copy it.
> 
> I guess it's an overlay, so it is like that by design.

Indeed.

We could perhaps provide a command to copy that string, patches
welcome.