patch 8.2.2901: some operators not fully tested

Problem:    Some operators not fully tested.
Solution:   Add a few test cases. (Yegappan Lakshmanan, closes #8282)
diff --git a/src/version.c b/src/version.c
index 4223259..7c1605f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2901,
+/**/
     2900,
 /**/
     2899,