Subject: Re: bug#1589: git's "--relative" option is relatively new :)

From: Richard M Stallman <[email-masked]>
Date: Sat, 27 Dec 2008 07:22:57 -0500

The above fix relies on the "--relative" option to the 'git
    diff-index' command.  That option came into being in git 1.5.5, which
    was released in April 2008.

Maybe that is ok, since git support in VC is new anyway.

By the time we release Emacs 23, git 1.5.5 will be several months
older.