patch 8.2.2713: folding code not sufficiently tested

Problem:    Folding code not sufficiently tested.
Solution:   Add a few more test cases. (Yegappan Lakshmanan, closes #8064)
diff --git a/src/version.c b/src/version.c
index 986ad77..5fcc0f6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2713,
+/**/
     2712,
 /**/
     2711,