+ "For specified BACKEND and FILES, show the VC log.
+Leave point at WORKING-REVISION, if it is non-nil.
+If IS-START-REVISION is non-nil, start the log from WORKING-REVISION
+\(not all backends support this); i.e., show only WORKING-REVISION and
+earlier revisions. Show up to LIMIT entries (non-nil means unlimited)."
+ ;; As of 2013/04 the only thing that passes IS-START-REVISION non-nil
+ ;; is vc-annotate-show-log-revision-at-line, which sets LIMIT = 1.
+