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

[Eli Zaretskii]

> From: Jan Djärv <jan.h.d@swipnet.se>
> Date: Sat, 7 Sep 2013 10:47:05 +0200
> Cc: xfq.free@gmail.com,
>  15273@debbugs.gnu.org
> 
> FWIW, I tested the mac port that has another font driver, and it doesn't work 
> correctly either.  It does not find a good font for the triangle and only 
> displays an empty square.  No composition happens.

The support for this character seems to be very scarce.  This page:

  http://www.fileformat.info/info/unicode/char/20e4/fontsupport.htm

lists some fonts, but at least some of them seem to not have a glyph
for this character, at least on Windows.  Code2000 does display the
characters, but that font is not free.