Signed-off-by: NJunio C Hamano <junkio@cox.net>

The code forgot that setup_revisions() leaves parsed object
names in reverse in the list.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

You gotta love sparse:

builtin-diff.c:88:4: error: Just how const do you want this type to be?
Signed-off-by: NPeter Hagervall <hager@cs.umu.se>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When calling "git fmt-patch HEAD~5", you now get the same as if you would
have said "git fmt-patch HEAD~5..". This makes it easier for my fingers
which are so used to the old syntax.
Signed-off-by: NJohannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NJunio C Hamano <junkio@cox.net>

"git diff(n)" without --base, --ours, etc. defaults to --cc,
which usually is the same as -p unless you are in the middle of
a conflicted merge, just like the shell script version.

"git diff(n) blobA blobB path" complains and dies.

"git diff(n) tree0 tree1 tree2...treeN" does combined diff that
shows a merge of tree1..treeN to result in tree0.

Giving "-c" option to any command that defaults to "--cc" turns
off dense-combined flag.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This starts to replace the shell script version of "git diff".
Signed-off-by: NJunio C Hamano <junkio@cox.net>