(diff-mode): Fix typo in docstring.

diff --git a/lisp/diff-mode.el b/lisp/diff-mode.el
index fa8ef2e15656993f98be2b108e79b0c6ec8f54fe..1cb5111dcfb6a19c73bd7875c64b991c8d035f38 100644 (file)
--- a/lisp/diff-mode.el
+++ b/lisp/diff-mode.el
@@ -935,7 +935,7 @@ See `after-change-functions' for the meaning of BEG, END and LEN."
 Supports unified and context diffs as well as (to a lesser extent)
 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
+If you edit the buffer manually, diff-mode will try to update the hunk
 headers for you on-the-fly.
 
 You can also switch between context diff and unified diff with \\[diff-context->unified],