bug#5050: 23.1; efiff: Displaying bytes instead of characters in messages

[Eli Zaretskii]

> From: Stephen Berman <stephen.berman@gmx.net>
> Date: Thu, 20 Aug 2020 21:51:44 +0200
> Cc: Sebastian Rose <sebastian_rose@gmx.de>, 5050@debbugs.gnu.org
> 
> > This is the problem: ediff-coding-system-for-read is raw-text, which
> > gives us the binary data in the buffer instead of characters.
> 
> Indeed, and when I set ediff-coding-system-for-read to utf-8 and carry
> out the OP's recipe, the German text is displayed as it should be with
> umlaut.

Does setting ediff-coding-system-for-read to utf-8 botch comparison of
files that are encoded in something other than UTF-8?  I think it
will, so this is not the right solution.  Our problem is only with the
messages that end up in the Ediff error buffer.