patch 8.2.0889: using old style comments

Problem:    Using old style comments.
Solution:   Use // comments. (Yegappan Lakshmanan, closes #6190)
diff --git a/src/version.c b/src/version.c
index 9522510..ece5a39 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    889,
+/**/
     888,
 /**/
     887,