Fix warnings when building the docs

It may be nice to make builds fail if new documentation generates warnings, to
avoid these sorts of problems slipping in in the future.

docs/index.rst

@@ -130,6 +130,5 @@ you.
    :maxdepth: 1
 
    dev/philosophy
-   dev/internals
    dev/todo
    dev/authors

docs/user/advanced.rst

@@ -300,7 +300,7 @@ Then, we can make a request using our Pizza Auth::
     >>> requests.get('http://pizzabin.org/admin', auth=PizzaAuth('kenneth'))
     <Response [200]>
 
-.. _streaming-requests
+.. _streaming-requests:
 
 Streaming Requests
 ------------------