bug#15273: 24.3.50; Combining character sequences are displayed weirdly

[Eli Zaretskii]

> Date: Thu, 05 Sep 2013 20:12:13 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: xfq.free@gmail.com, 15273@debbugs.gnu.org
> 
> > The NS one looks better, but when moving the cursor over the first row, it 
> > redraws funny.  And metrics are off, the distance between the first 
> > triangle and the aaa to the right is actually only one space.  The aaa to 
> > the left is also followed by a space, but there the distance is too short, 
> > and the source of the redraw error.
> > 
> > W32 anyone?
> 
> On w32, the Uniscribe font driver does not compose these two
> characters.  So I guess this composition is done by the driver used by
> NS, and perhaps the composition information Emacs gets is incorrect.
> 
> Once again, please show the full output of "C-u C-x =" on the composed
> character, the pixel-level data of the composition shown there will
> probably tell us what is wrong.

On one OSX system, the result of "! C-x 8 RET 2 0 E 4 RET" _looks_
like a single character, but actually isn't: I can move cursor twice
across the result, and "C-u C-x =" doesn't show the composition
results.  Is that what you see?