patch 8.2.3658: duplicate code in xxd

Problem:    Duplicate code in xxd.
Solution:   Merge duplicated code. Add more tests. (closes #9192)
diff --git a/src/version.c b/src/version.c
index baca0af..a261ebd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3658,
+/**/
     3657,
 /**/
     3656,