Add 'Ellipses' object.

Python/bltinmodule.c

@@ -1624,6 +1624,7 @@ initbuiltin()
 	INCREF(builtin_dict);
 	initerrors();
 	(void) dictinsert(builtin_dict, "None", None);
+	(void) dictinsert(builtin_dict, "Ellipses", Py_Ellipses);
 }