bug#28570: [PATCH] Implement ‘vc-default-dir-extra-headers’ for vc-rcs

[İ . Göktuğ Kayaalp]

Add an implementation of this for vc-rcs that does nothing to suppress
the message the default function adds to the vc-dir buffer (Bug#28570).
* lisp/vc/vc-rcs.el (vc-rcs-dir-extra-headers): New function.
---
 lisp/vc/vc-rcs.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lisp/vc/vc-rcs.el b/lisp/vc/vc-rcs.el
index db1addbecd..6e639f8d13 100644
--- a/lisp/vc/vc-rcs.el
+++ b/lisp/vc/vc-rcs.el
@@ -177,6 +177,8 @@ vc-rcs-dir-status-files
          (push (list frel state) result))))
     (funcall update-function result)))
 
+(defun vc-rcs-dir-extra-headers (&rest ignore))
+
 (defun vc-rcs-working-revision (file)
   "RCS-specific version of `vc-working-revision'."
   (or (and vc-consult-headers
-- 
2.11.0