PEP 3114: rename .next() to .__next__() and add next() builtin.
diff --git a/Lib/test/test_difflib.py b/Lib/test/test_difflib.py
index 83fad15..b5168dd 100644
--- a/Lib/test/test_difflib.py
+++ b/Lib/test/test_difflib.py
@@ -16,9 +16,9 @@
     def test_comparing_empty_lists(self):
         # Check fix for bug #979794
         group_gen = difflib.SequenceMatcher(None, [], []).get_grouped_opcodes()
-        self.assertRaises(StopIteration, group_gen.next)
+        self.assertRaises(StopIteration, next, group_gen)
         diff_gen = difflib.unified_diff([], [])
-        self.assertRaises(StopIteration, diff_gen.next)
+        self.assertRaises(StopIteration, next, diff_gen)
 
 patch914575_from1 = """
    1. Beautiful is beTTer than ugly.