Bump trunk to 3.3 alpha 0.
diff --git a/Doc/tutorial/stdlib2.rst b/Doc/tutorial/stdlib2.rst
index fe7f027..603f143 100644
--- a/Doc/tutorial/stdlib2.rst
+++ b/Doc/tutorial/stdlib2.rst
@@ -271,7 +271,7 @@
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
        d['primary']                # entry was automatically removed
-     File "C:/python31/lib/weakref.py", line 46, in __getitem__
+     File "C:/python33/lib/weakref.py", line 46, in __getitem__
        o = self.data[key]()
    KeyError: 'primary'