When pathspecs are given, update-index --again further limits
the set of paths to be updated to those that match them.
Signed-off-by: Junio C Hamano <junkio@cox.net>
After running 'git-update-index' for some paths, you may want to
do the update on the same set of paths again.
The new flag --again checks the paths whose index entries are
are different from the HEAD commit and updates them from the
working tree contents.
This was brought up by Carl Worth on #git.
Signed-off-by: Junio C Hamano <junkio@cox.net>