bug#28339: 25.2; Emacs shows ZWNJ character (Zero Width non-Joiner) as Space

[Eli Zaretskii]

> From: Nima Aryan <nimawebgard@gmail.com>
> Date: Sun, 03 Sep 2017 15:57:34 +0000
> 
> I'm trying to write a XeLaTeX document using Emacs+AUCTex. Everything is 
> awesome except this issue
> which Emacs do not show ZWNJ character. However it write it correctly in the 
> file when I save the document
> and I'm able to see the characters correctly when I open it in other editors. 
> 
> I've tested in different conditions (fresh Emacs with default settings, 
> different fonts, even with new user) but
> the problem exists. This problem is specific to Emacs and I've no such 
> problem in other editors. 

Emacs traditionally tries not to hide characters from the user.
However, this is just the default, and you can customize it: the
variable 'glyphless-char-display-control' controls how this and other
similar characters are shown.

OK?