bug#44236: [PATCH] xdisp: Apply nobreak-char-display also to NARROW NO-BREAK SPACE U+202F

[Eli Zaretskii]

> From: Neil Roberts <bpeeluk@yahoo.co.uk>
> Cc: 44236@debbugs.gnu.org
> Date: Tue, 27 Oct 2020 10:17:35 +0100
> 
> > OTOH, if we make U+202F stand out, then why not others, for example
> > U+2007? or U+2060? or U+2002? or U+2003? or U+2009 etc.
> 
> I think it would make sense to highlight all of the spaces that look
> exactly the same as a regular space. That would exclude U+2060 because
> that is zero-width. Maybe we could use all of the characters from the
> “space separator” Unicode class except U+0020.

I'm okay with displaying all "space" characters that way.  We already
have a function which tests this category: blankp.  Would you like to
submit a patch which implements the above?  Please also include a NEWS
entry which calls out this new behavior.

Thanks.