bug#34035: 26.1; Arabic shadda-kasrah renders incorrectly

[Eli Zaretskii]

> From: "Basil L. Contovounesios" <contovob@tcd.ie>
> Cc: stefan@marxist.se,  34035@debbugs.gnu.org,  stephen.berman@gmx.net,
>   craven@gmx.net
> Date: Wed, 19 Aug 2020 17:20:57 +0100
> 
> > You mean, the order of showing the glyphs in the grapheme cluster?  I
> > eventually convinced myself that this is a side effect of how HarfBuzz
> > works with R2L compositions, not a bug.
> 
> That and "why the default font has any effect on how characters in a
> non-default font are displayed".

Ah, that was me not paying attention: using Symbola as the default
font changed the font used for Arabic to DejaVu Sans, instead of
DejaVu Sans Mono.