Update runtime files.
diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index ab582dc..0e03a57 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -1,4 +1,4 @@
-*diff.txt* For Vim version 7.3. Last change: 2012 May 18
+*diff.txt* For Vim version 7.3. Last change: 2012 Aug 08
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -333,7 +333,7 @@
The "1a2" item appends the line "bbb".
The "4d4" item deletes the line "111".
-The '7c7" item replaces the line "GGG" with "ggg".
+The "7c7" item replaces the line "GGG" with "ggg".
When 'diffexpr' is not empty, Vim evaluates it to obtain a diff file in the
format mentioned. These variables are set to the file names used: