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

[Juri Linkov]

>> The intention of nobreak-space is to warn the user about confusable
>> characters in writable buffers.  But why highlight such characters
>> in read-only Dired buffers?
>
> Perhaps `special-mode' should switch this highlighting off?

In Dired it's still useful to be able to spot unusual characters
in file names, but such highlighting is useless in file sizes.

Maybe highlighting should check for some text properties,
and not to highlight nobreak-chars in text with these properties?