fill in actual issue number in tests
diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 4e2de3d..02dadef 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -420,7 +420,7 @@
             gc.collect()
 
     def test_container_iterator(self):
-        # Bug # XXX: tp_traverse was not implemented for deque iterator objects
+        # Bug #3680: tp_traverse was not implemented for deque iterator objects
         class C(object):
             pass
         for i in range(2):