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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: emacs rendering comparisson between emacs23 and emacs26.3
Date: Fri, 27 Mar 2020 10:00:02 +0300
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> From: rrandresf@gmail.com
> Date: Thu, 26 Mar 2020 20:38:22 +0000
> Cc: Richard Stallman <rms@gnu.org>, emacs-devel@gnu.org
> 
> As Eli pointed out on another email on this same thread. It could be
> BIDI. I would need to check on configure If it is possible to deactivate
> BIDI support and see what difference it Does.

It's not possible.  Bidirectional editing support in Emacs is
unconditional, it isn't an optional feature.

What I would suggest is to compare with Emacs 24.1, which already
supported bidi.