patch 7.4.801
Problem:    Test for ":diffoff" doesn't catch all potential problems.
Solution:   Add a :diffthis and a :diffoff command. (Olaf Dabrunz)
diff --git a/src/version.c b/src/version.c
index cf4d74a..12ddab2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    801,
+/**/
     800,
 /**/
     799,