bpo-30642: IDLE: Fix test_query refleak (#2147)

mlouielu · terryjreedy · commit b070fd275b68 · 2017-06-13T08:29:44.000-04:00
Patch by Louie Lu.
diff --git a/Lib/idlelib/idle_test/test_query.py b/Lib/idlelib/idle_test/test_query.py
@@ -258,6 +258,7 @@ def setUpClass(cls):
 
     @classmethod
     def tearDownClass(cls):
+        del cls.dialog.destroy
         del cls.dialog
         cls.root.destroy()
         del cls.root
