[MERGE] Implement a --diff-command option for bzr diff.

[Aaron Bentley]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Matthieu Moy wrote:
> This is the dual of --diff-options, which allows passing arbitrary
> options to GNU diff. This allows using any command as a diff driver.
> 
> I need this to be able to run oodiff
> ( http://www-verimag.imag.fr/~moy/opendocument/ ) as a diff driver for
> OpenDocument files.

Actually, I find the difftools plugin does a great job of running
external diff tools.  But I don't have an objection to doing it in the
core.  I'll give this a careful review later.

Aaron
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFG0vIx0F+nu1YWqI0RAur4AJ0bFuWHqQ3+sCqOREdeE4Fa2B4ZEwCggRJN
X3MjM0dw25Q33VHVASX3IPc=
=DbWj
-----END PGP SIGNATURE-----