Fixed -- Doc'd Widget.build_attrs() signature change in Django 1.11.
@@ -739,6 +739,9 @@ Miscellaneous
* Support for IPython < 1.0 is removed from the ``shell`` command.
+* The signature of private API ``Widget.build_attrs()`` changed from
+ ``extra_attrs=None, **kwargs`` to ``base_attrs, extra_attrs=None``.
+
.. _deprecated-features-1.11:
Features deprecated in 1.11
