Update runtime files.
diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index 7361d42..9951028 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 Feb 03
+*diff.txt* For Vim version 8.0. Last change: 2017 Sep 02
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -226,8 +226,8 @@
(searching from the end of the line). The
text in between is highlighted. This means
that parts in the middle that are still the
- same are highlighted anyway. Only "iwhite" of
- 'diffopt' is used here.
+ same are highlighted anyway. The 'diffopt'
+ flags "iwhite" and "icase" are used here.
|hl-DiffDelete| DiffDelete Deleted lines. Also called filler lines,
because they don't really exist in this
buffer.