Subject: vc-annotate-show-changeset-diff-revision-at-line does not work correctly for git
From: Dan Nicolaescu <[email-masked]>
To: [email-masked]
Date: Mon, 21 Jun 2010 21:14:44 -0400
List-Id: <debbugs-submit.debbugs.gnu.org>

vc-annotate-show-changeset-diff-revision-at-line does not work
correctly for git, it does not show the correct changeset diff.
vc-annotate-show-changeset-diff-revision-at-line calls
vc-annotate-show-diff-revision-at-line-internal which calls 

(vc-call-backend vc-annotate-backend 'previous-revision
                               fname rev)

and that will return the SHA1 for the previous commit that changed fname.
That's not what we want for a changeset diff.