bug#1183: 23.0.60; ediff-buffers is broken

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: kifer@cs.sunysb.edu,  handa@m17n.org,  drew.adams@oracle.com,  
> 1183@emacsbugs.donarmstrong.com,  bug-gnu-emacs@gnu.org,  
> kifer@cs.stonybrook.edu
> Date: Sat, 18 Oct 2008 22:17:06 -0400
> 
> >> Back then Stefan suggested emacs-mule instead of no-conversion, but for 
> >> some
> >> reason this was not done--don't remember why.
> 
> > No special reason.
> 
> Actually, after looking at it a little bit, there are some reasons: the
> encoding is currently set in ediff-make-temp-file which is used in many
> different circumstances, some of which should use emacs-internal, but
> maybe not all.

We have ediff-job-name to distinguish between the different
use-cases.  Ediff already does that in several places, e.g., to pass
the "--binary" option to Diff.