(define-derived-mode diff-mode fundamental-mode "Diff"
"Major mode for viewing/editing context diffs.
Supports unified and context diffs as well as (to a lesser extent)
-normal diffs. If you edit the buffer manually, diff-mode will try
-to update the hunk headers for you on-the-fly.
+normal diffs.
When the buffer is read-only, the ESC prefix is not necessary.
If you edit the buffer manually, diff-mode will try to update the hunk
or vice versa with \\[diff-unified->context] and you can also reverse the direction of
a diff with \\[diff-reverse-direction].
-When the buffer is read-only, the Meta- modifier is not necessary
-to run the Diff mode commands:
-
\\{diff-mode-map}"
(set (make-local-variable 'font-lock-defaults) diff-font-lock-defaults)