SF patch 1631942 by Collin Winter:
(a) "except E, V" -> "except E as V"
(b) V is now limited to a simple name (local variable)
(c) V is now deleted at the end of the except block
diff --git a/Lib/test/test_contextlib.py b/Lib/test/test_contextlib.py
index 747785d..9142428 100644
--- a/Lib/test/test_contextlib.py
+++ b/Lib/test/test_contextlib.py
@@ -76,7 +76,7 @@
             state.append(1)
             try:
                 yield 42
-            except ZeroDivisionError, e:
+            except ZeroDivisionError as e:
                 state.append(e.args[0])
                 self.assertEqual(state, [1, 42, 999])
         with woohoo() as x: