Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj
argument.

This is needed for support Tcl/Tk 8.6.
diff --git a/Misc/NEWS b/Misc/NEWS
index 12ad047..5739610 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -32,6 +32,9 @@
 Library
 -------
 
+- Issue #16809: Tkinter's splitlist() and split() methods now accept Tcl_Obj
+  argument.
+
 - Issue #17119: Fixed integer overflows when processing large Unicode strings
   and tuples in the tkinter module.