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-rw-r--r--lisp/vc.el6
1 files changed, 6 insertions, 0 deletions
diff --git a/lisp/vc.el b/lisp/vc.el
index 3376113711..1af8bfc80c 100644
--- a/lisp/vc.el
+++ b/lisp/vc.el
@@ -465,6 +465,12 @@
;;
;; MISCELLANEOUS
;;
+;; - root (dir)
+;;
+;; Return DIR's "root" directory, that is, a parent directory of
+;; DIR for which the same backend as used for DIR applies. If no
+;; such parent exists, this function should return DIR.
+;;
;; - make-version-backups-p (file)
;;
;; Return non-nil if unmodified repository revisions of FILE should be