small formatting fix.

docs/access.rst

@@ -99,10 +99,10 @@ The group required view mixin ensures that the requesting user is in the group o
 
     .. note::
         The mixin assumes you're using Django's default Group model and that your user model provides ``groups`` as a ManyToMany relationship.
-        If this **is not** the case, you'll need to override `check_membership` in the mixin to handle your custom set up.
+        If this **is not** the case, you'll need to override ``check_membership`` in the mixin to handle your custom set up.
 
 Standard Django Usage
----------------------
+^^^^^^^^^^^^^^^^^^^^^
 
 ::
 
@@ -116,7 +116,7 @@ Standard Django Usage
 
 
 Custom Group Usage
-------------------
+^^^^^^^^^^^^^^^^^^
 
 ::