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

[Eli Zaretskii]

> From: sadid sahami <sadidsahami@gmail.com>
> Date: Mon, 04 Sep 2017 05:05:03 +0000
> 
> I've provided a minimal test text, written in Emacs (Test.text) and its 
> display for Gedit (Gedit_display.png) and
> Emacs (Emacs_display.png). The Gedit display is the correct one. 

Hmm.. on my system I see a display that is almost identical to what
your "Gedit" display shows.

CC'ing Handa-san who might be able to help us with verifying the
composition rules for Persian.  Or maybe this is a problem with the
shaping engine used on GNU/Linux?

In any case, disabling bidi reordering doesn't fix the display (it
makes the display much worse for me), so it is not the problem.