[PATCH] Make filediff viewers adjustable widths

[Mark Doliner <mark kingant net>]

I filed a bug in your bug tracker with a patch for this, but I thought
I'd send an email here, too:
http://bugzilla.gnome.org/show_bug.cgi?id=576934

I'm not good at describing this, and a picture is worth 1000 words, so:
http://bugzilla.gnome.org/attachment.cgi?id=131487

Thinking about this change in your head it doesn't seem like a
necessity.  But once you've used it a little bit you get used to it
and realize just how awesome it is :-)

-Mark