patch 8.2.4221: some functions in normal.c are very long

Problem:    Some functions in normal.c are very long.
Solution:   Move code to separate functions. (Yegappan Lakshmanan,
            closes #9628)
diff --git a/src/version.c b/src/version.c
index 86dcf4e..3d4fac6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4221,
+/**/
     4220,
 /**/
     4219,