patch 8.2.4205: the normal_cmd() function is too long

Problem:    The normal_cmd() function is too long.
Solution:   Move parts to separate functions. (Yegappan Lakshmanan,
            closes #9608)
diff --git a/src/version.c b/src/version.c
index 2208c1c..4cb980e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4205,
+/**/
     4204,
 /**/
     4203,