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-rw-r--r--lisp/vc.el3
1 files changed, 3 insertions, 0 deletions
diff --git a/lisp/vc.el b/lisp/vc.el
index 87cade8485..2d5e325de2 100644
--- a/lisp/vc.el
+++ b/lisp/vc.el
@@ -418,6 +418,9 @@
;; Invoked from a buffer in vc-annotate-mode, return the revision
;; corresponding to the current line, or nil if there is no revision
;; corresponding to the current line.
+;; If the backend supports annotating through copies and renames,
+;; and displays a file name and a revision, then return a cons
+;; (REVISION . FILENAME).
;;
;; TAG SYSTEM
;;