Remove a couple of .html suffixes in docs

docs/index.md

@@ -255,11 +255,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 [0.4]: https://github.com/tomchristie/django-rest-framework/tree/0.4.X
 [image]: img/quickstart.png
 [index]: .
-[oauth1-section]: api-guide/authentication.html#oauthauthentication
-[oauth2-section]: api-guide/authentication.html#oauth2authentication
-[serializer-section]: api-guide/serializers.html#serializers
-[modelserializer-section]: api-guide/serializers.html#modelserializer
-[functionview-section]: api-guide/views.html#function-based-views
+[oauth1-section]: api-guide/authentication#oauthauthentication
+[oauth2-section]: api-guide/authentication#oauth2authentication
+[serializer-section]: api-guide/serializers#serializers
+[modelserializer-section]: api-guide/serializers#modelserializer
+[functionview-section]: api-guide/views#function-based-views
 [sandbox]: http://restframework.herokuapp.com/
 
 [quickstart]: tutorial/quickstart.md

docs/topics/2.2-announcement.md

@@ -151,7 +151,7 @@ From version 2.2 onwards, serializers with hyperlinked relationships *always* re
 [porting-python-3]: https://docs.djangoproject.com/en/dev/topics/python3/
 [python-compat]: https://docs.djangoproject.com/en/dev/releases/1.5/#python-compatibility
 [django-deprecation-policy]: https://docs.djangoproject.com/en/dev/internals/release-process/#internal-release-deprecation-policy
-[credits]: http://django-rest-framework.org/topics/credits.html
+[credits]: http://django-rest-framework.org/topics/credits
 [mailing-list]: https://groups.google.com/forum/?fromgroups#!forum/django-rest-framework
 [django-rest-framework-docs]: https://github.com/marcgibbons/django-rest-framework-docs
 [marcgibbons]: https://github.com/marcgibbons/