patch 7.4.1571
Problem:    No test for ":help".
Solution:   Add a test for what 7.4.1568 fixed. (Higashi Higashi)
diff --git a/src/version.c b/src/version.c
index f6b1f3b..944ffea 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1571,
+/**/
     1570,
 /**/
     1569,