git-commit-propertize-diff: ensure diff-mode keeps buffer writable

Fixes #3170.
magit · Sep 14, 2017 · 746f236 · 746f236
1 parent 6b7dd53
commit 746f236
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lisp/git-commit.el b/lisp/git-commit.el
@@ -733,7 +733,8 @@ Added to `font-lock-extend-region-functions'."
             (with-current-buffer buffer
               (prog1 (buffer-substring-no-properties (point) (point-max))
                 (delete-region (point) (point-max)))))
-           (diff-mode)
+           (let ((diff-default-read-only nil))
+             (diff-mode))
            (let (font-lock-verbose font-lock-support-mode)
              (if (fboundp 'font-lock-ensure)
                  (font-lock-ensure)