patch 9.0.0202: code and help for indexof() is not ideal

Problem:    Code and help for indexof() is not ideal.
Solution:   Refactor the code, improve the help. (Yegappan Lakshmanan,
            closes #10908)
diff --git a/src/version.c b/src/version.c
index 1a41dd2..6d2ef9c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    202,
+/**/
     201,
 /**/
     200,