patch 8.0.0525: completion for user command argument not tested

Solution:   Completion for user command argument not tested.
Problem:    Add a test.
diff --git a/src/version.c b/src/version.c
index f490deb..ba3aefc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    525,
+/**/
     524,
 /**/
     523,