Update runtime files
diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index 9951028..1a7ca73 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -1,4 +1,4 @@
-*diff.txt* For Vim version 8.0. Last change: 2017 Sep 02
+*diff.txt* For Vim version 8.0. Last change: 2017 Sep 26
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -10,7 +10,7 @@
The basics are explained in section |08.7| of the user manual.
-1. Starting diff mode |vimdiff|
+1. Starting diff mode |start-vimdiff|
2. Viewing diffs |view-diffs|
3. Jumping to diffs |jumpto-diffs|
4. Copying diffs |copy-diffs|
@@ -19,7 +19,7 @@
{not in Vi}
==============================================================================
-1. Starting diff mode
+1. Starting diff mode *start-vimdiff*
The easiest way to start editing in diff mode is with the "vimdiff" command.
This starts Vim as usual, and additionally sets up for viewing the differences