Subject: bug#27544: 25.1; Visualization of Unicode bidirectional marks

From: Itai Berli <[email-masked]>
Date: Sat, 1 Jul 2017 15:36:39 +0300

> This is how Emacs behaves, again in line with general Emacs feature of allowing users to see what's in the buffer.

Except the current display doesn't allow the user to see what's in the buffer.

 > The UBA also allows to retain these characters, including display
them, see section 5.2 there.

Well, section 5.2 of the UBA explains:

> retention of these formatting characters and BNs is important to users who need to display a graphic representation of hidden characters, and who thus need to obtain their visual positions for display.

Emacs users who need to display a graphic representation of the bidi
marks are ill-served by the current implementation. And so are those
who don't need to display a graphic representation of them. The
current implementation is the worse of both worlds.