Fix vc-root-diff broken with Git as well

* lisp/vc/vc.el (vc-root-diff): Fix similar to 35023214031e1 by
avoiding the abbreviated directory name in argument (bug#39452).

diff --git a/lisp/vc/vc.el b/lisp/vc/vc.el
index e2b12c6cb03798e2145ac15cb69a9d9eb37cba62..b75862e8a5291a78c157628564fe170909e0b62b 100644 (file)
--- a/lisp/vc/vc.el
+++ b/lisp/vc/vc.el
@@ -2056,7 +2056,7 @@ saving the buffer."
       ;; relative file names work.
       (let ((default-directory rootdir))
        (vc-diff-internal
-        t (list backend (list rootdir) working-revision) nil nil
+        t (list backend (list (expand-file-name rootdir)) working-revision) nil nil
         (called-interactively-p 'interactive))))))
 
 ;;;###autoload