bug#4451: 23.1; EOL problems with vc-diff and cygwin

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: 4451@emacsbugs.donarmstrong.com, Eli Zaretskii <eliz@gnu.org>
> Date: Thu, 17 Sep 2009 12:35:37 -0400
> 
> I think the best solution is to change vc-coding-system-for-diff so that
> when it takes the coding system from (with-current-buffer buf
> buffer-file-coding-system), it ignores the EOL part of that
> coding system.

Why do you think so?

My line of thinking was that a diff of a file with Unix EOLs should
always yield a diffs file with Unix EOLs.