diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index d3466bf..49cdf1c 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -1,4 +1,4 @@
-*diff.txt*      For Vim version 7.0d.  Last change: 2006 Apr 04
+*diff.txt*      For Vim version 7.0d.  Last change: 2006 Apr 14
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -206,7 +206,8 @@
 				(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.
+				same are highlighted anyway.  Only "iwhite" of
+				'diffopt' is used here.
 |hl-DiffDelete| DiffDelete	Deleted lines.  Also called filler lines,
 				because they don't really exist in this
 				buffer.