bug#20871: 25.0.50; fill-single-char-nobreak-p does not recognize a single-letter word when it is preceded by an open paren

[Eli Zaretskii]

> From: Marcin Borkowski <mbork@mbork.pl>
> Cc: 20871@debbugs.gnu.org
> Date: Sat, 13 Jan 2018 17:01:14 +0100
> 
> > So please post the full patch for this issue, and let's take it from
> > there.
> 
> Thanks.  Why not just merge my branch into master?

Because that would not have the patch recorded by the tracker, and
because I'd like to have the patch reviewed by others if they want.

Thanks.