(vc-git-mode-line-string): Don't use `replace-regexp-in-string'

* lisp/vc/vc-git.el (vc-git-mode-line-string): Use `substring'
instead of `replace-regexp-in-string', because REV can be nil
(e.g. when FILE is a directory, bug#23344), and we actually know
we only need the first 4 characters.

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/vc/vc-git.el b/lisp/vc/vc-git.el
index f8b0b6fcd54..5d06bf7f357 100644
--- a/lisp/vc/vc-git.el
+++ b/lisp/vc/vc-git.el
@@ -284,7 +284,7 @@ Should be consistent with the Git config value i18n.logOutputEncoding."
          (def-ml (vc-default-mode-line-string 'Git file))
          (help-echo (get-text-property 0 'help-echo def-ml))
          (face   (get-text-property 0 'face def-ml)))
-    (propertize (replace-regexp-in-string (concat rev "\\'") disp-rev def-ml t t)
+    (propertize (concat (substring def-ml 0 4) disp-rev)
                 'face face
                 'help-echo (concat help-echo "\nCurrent revision: " rev))))