patch 8.2.3459: Vim9: need more tests for empty string arguments

Problem:    Vim9: need more tests for empty string arguments.
Solution:   Add more tests.  Also use empty argument with menu_info() to get
            the top-level menu names. (Yegappan Lakshmanan, closes #8925)
diff --git a/src/version.c b/src/version.c
index 54e5c60..8436095 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3459,
+/**/
     3458,
 /**/
     3457,