Fix error text in test.

docs/topics/3.1-announcement.md

@@ -4,7 +4,7 @@
 
 #### Pagination controls in the browsable API.
 
-#### New pagination schemes.
+#### New schemes, including cursor pagination.
 
 #### Support for header-based pagination.
 
@@ -12,4 +12,6 @@
 
 ## Internationalization
 
+## New fields
+
 ## ModelSerializer API

rest_framework/views.py

@@ -4,6 +4,7 @@ Provides an APIView class that is the base of all views in REST framework.
 from __future__ import unicode_literals
 from django.core.exceptions import PermissionDenied
 from django.http import Http404
+from django.utils import six
 from django.utils.encoding import smart_text
 from django.utils.translation import ugettext_lazy as _
 from django.views.decorators.csrf import csrf_exempt
@@ -74,11 +75,13 @@ def exception_handler(exc, context):
         return Response(data, status=exc.status_code, headers=headers)
 
     elif isinstance(exc, Http404):
-        data = {'detail': _('Not found.')}
+        msg = _('Not found.')
+        data = {'detail': six.text_type(msg)}
         return Response(data, status=status.HTTP_404_NOT_FOUND)
 
     elif isinstance(exc, PermissionDenied):
-        data = {'detail': _('Permission denied.')}
+        msg = _('Permission denied.')
+        data = {'detail': six.text_type(msg)}
         return Response(data, status=status.HTTP_403_FORBIDDEN)
 
     # Note: Unhandled exceptions will raise a 500 error.

tests/test_generics.py

@@ -483,7 +483,7 @@ class TestFilterBackendAppliedToViews(TestCase):
         request = factory.get('/1')
         response = instance_view(request, pk=1).render()
         self.assertEqual(response.status_code, status.HTTP_404_NOT_FOUND)
-        self.assertEqual(response.data, {'detail': 'Not found'})
+        self.assertEqual(response.data, {'detail': 'Not found.'})
 
     def test_get_instance_view_will_return_single_object_when_filter_does_not_exclude_it(self):
         """