Re: git diff: support "-U" and "--unified" options properly

Linus Torvalds [off-list ref] writes:

We used to parse "-U" and "--unified" as part of the GIT_DIFF_OPTS 
environment variable, but strangely enough we would _not_ parse them as 
part of the normal diff command line (where we only accepted "-u").

This adds parsing of -U and --unified, both with an optional numeric 
argument. So now you can just say

	git diff --unified=5

[ Maybe this can still hit 1.3.3? ]

I think so.