(diff-sentinel): Take note of diff error return value.

1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/diff.el b/lisp/diff.el
index e806a615cc7..8fb258cf1e7 100644
--- a/lisp/diff.el
+++ b/lisp/diff.el
@@ -68,7 +68,9 @@ were found."
     (goto-char (point-max))
     (let ((inhibit-read-only t))
       (insert (format "\nDiff finished%s.  %s\n"
-                      (if (equal 0 code) " (no differences)" "")
+                      (cond ((equal 0 code) " (no differences)")
+                            ((equal 2 code) " (diff error)")
+                            (t ""))
                       (current-time-string))))))
 
 (defvar diff-old-file nil)