Converted tabs to spaces in topics/auth/default.txt

docs/topics/auth/default.txt

@@ -730,7 +730,7 @@ user to the login page or issue an HTTP 403 Forbidden response.
     .. attribute:: permission_denied_message
 
         When ``raise_exception`` is ``True``, this attribute can be used to
-	control the error message passed to the error handler for display to
+        control the error message passed to the error handler for display to
         the user. Defaults to an empty string.
 
     .. attribute:: redirect_field_name
@@ -747,8 +747,8 @@ user to the login page or issue an HTTP 403 Forbidden response.
 
     .. method:: handle_no_permission()
 
-	Depending on the value of ``raise_exception``, the method either raises
-	a :exc:`~django.core.exceptions.PermissionDenied` exception or
+        Depending on the value of ``raise_exception``, the method either raises
+        a :exc:`~django.core.exceptions.PermissionDenied` exception or
         redirects the user to the ``login_url``, optionally including the
         ``redirect_field_name`` if it is set.