Add some comments to explain what the test is testing for

elcid/test/test_application.py

@@ -12,6 +12,9 @@ def test_get_menu_items(self):
     def test_make_sure_we_dont_change_a_global_object(self):
         # make sure we don't change the list as it appears on
         # the application object
-        menu_items_1 = copy(Application.get_menu_items())
+        menu_items_1 = Application.get_menu_items()
+        # We have to copy it because when it's a reference, both 1 and 2
+        # will be updated in place by the second get_menu_items() call
+        menu_items_1 = copy(menu_items_1)
         menu_items_2 = Application.get_menu_items()
         self.assertEqual(menu_items_1, menu_items_2)