PEP 3114: rename .next() to .__next__() and add next() builtin.
diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 2809904..7df31b7 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -394,13 +394,13 @@
         d = deque('abcdefg')
         it = iter(d)
         d.pop()
-        self.assertRaises(RuntimeError, it.next)
+        self.assertRaises(RuntimeError, next, it)
 
     def test_runtime_error_on_empty_deque(self):
         d = deque()
         it = iter(d)
         d.append(10)
-        self.assertRaises(RuntimeError, it.next)
+        self.assertRaises(RuntimeError, next, it)
 
 class Deque(deque):
     pass
@@ -567,7 +567,7 @@
 ...     while pending:
 ...         task = pending.popleft()
 ...         try:
-...             yield task.next()
+...             yield next(task)
 ...         except StopIteration:
 ...             continue
 ...         pending.append(task)