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

[Juri Linkov]

>> In Dired it's still useful to be able to spot unusual characters
>> in file names, but such highlighting is useless in file sizes.
>
> If the idea is to spot malicious filenames that have confusable
> characters then I think the problem is much larger than just confusing
> space characters. For example “.аl‌ias”, with a letter from the Cyrillic
> alphabet and a zero-width space. I think that particular problem is out
> of scope for the nobreak-char-display feature.

You tried to sneak in confusable characters, but I see them clearly,
heh heh :-)

These characters are revealed thanks to the 'markchars' package from GNU ELPA,
and glyphless-char face customized to :background "red".