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?
>
> That sounds too drastic to me.

I agree.

> But perhaps we should only highlight this character and other "thin"
> spaces only on TTY frames, where they really look like a SPC?
> Because on GUI frames it is quite easy to understand that they are not
> a SPC character.

Even on GUI frames with monospaced fonts I see that NARROW NO-BREAK SPACE
still has the same width as all other space characters.  So there is
no visual difference between them on GUI frames.