patch 8.2.0898: missing help for a function goes unnoticed

Problem:    Missing help for a function goes unnoticed.
Solution:   Add a test. (Gary Johnson)
diff --git a/src/version.c b/src/version.c
index 4262aab..ce8bbf1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    898,
+/**/
     897,
 /**/
     896,