Added some shell output in tutorial 2.
@@ -361,6 +361,7 @@ With that ready, we can ask the client to do some work for us::
>>> # get a response from '/'
>>> response = client.get('/')
+ Not Found: /
>>> # we should expect a 404 from that address; if you instead see an
>>> # "Invalid HTTP_HOST header" error and a 400 response, you probably
>>> # omitted the setup_test_environment() call described earlier.
