bug#40687: Missing right border on composed text used in 'display property

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: Clément Pit-Claudel <cpitclaudel@gmail.com>,
>   40687@debbugs.gnu.org
> Date: Fri, 24 Apr 2020 14:10:57 +0200
> 
> >>>>> On Thu, 23 Apr 2020 18:48:09 +0300, Eli Zaretskii <eliz@gnu.org> said:
> 
>     Eli> Thanks, should be fixed now.
> 
>     Eli> FTR, a recipe to test more fully display of composed text with a :box
>     Eli> face is below.  I found quite a few problems with this, especially
>     Eli> when the text in the boxed face ends with a composed character.  They
>     Eli> should be fixed now on the master branch.  I tested this fully only 
> on
>     Eli> MS-Windows; could someone please use the recipe below to verify the
>     Eli> display looks correctly also on X and on NS?  Note that what appears
>     Eli> below to be LATIN SMALL LETTER A WITH ACUTE is not a single 
> character,
>     Eli> but 2 characters that are composed into a single glyph.
> 
> It all looks correct on NS as well (once I switched to a font that had both
> an 'a' and a COMBINING ACUTE ACCENT glyph, Menlo in this case)

Great, so I'm closing this bug.  Thanks to all who supported the
testing of the fix.

P.S. FTR: the fix is on the master branch, so it will be in Emacs
28.1.