bug#66503: 29.1; Problem rendering Arabic diacriticals

[Eli Zaretskii]

> Date: Thu, 12 Oct 2023 21:39:52 +0100
> From: Alan Third <alan@idiocy.org>
> 
> On Thu, Oct 12, 2023 at 10:52:16AM -0700, John Wiegley wrote:
> > Hello maintainers,
> > 
> > I have found that Emacs does not render Arabic diacriticals correctly when
> > there are multiple of them.
> 
> > In GNU Emacs 29.1 (build 1, x86_64-apple-darwin22.6.0, Carbon Version 169
> > AppKit 2299.7)
> > Windowing system distributor 'Apple Inc.', version 10.16.0
> > System Description:  macOS 13.6
> 
> FYI I believe this is Mutsuharu Yamamoto's Mac port.
> 
> The NS port uses substantially the same code-base for font production,
> I think, but there' may be differences.

I don't see HARFBUZZ in the features posted by John, so I guess that
port doesn't use HarfBuzz.