bug#27526: 25.1; Nonconformance to Unicode bidirectionality algorithm due to paragraph separator

[Eli Zaretskii]

> From: Itai Berli <itai.berli@gmail.com>
> Date: Tue, 4 Jul 2017 19:37:04 +0300
> 
> And while you're perusing the code, perhaps you can see if it is also
> possible to allow the user to decide whether they want the bidi control 
> characters to be visible or not

You can do that already: just customize glyphless-char-display-control
to be 'zero-width' for the 'format-control' class, and these
characters will become invisible.  Didn't I mention that up-thread?