Fixed -- Clarified Aggregate.empty_result_set_value docs.
@@ -418,9 +418,8 @@ The ``Aggregate`` API is as follows:
.. versionadded:: 4.0
- Override :attr:`~django.db.models.Expression.empty_result_set_value` to
- ``None`` since most aggregate functions result in ``NULL`` when applied
- to an empty result set.
+ Defaults to ``None`` since most aggregate functions result in ``NULL``
+ when applied to an empty result set.
The ``expressions`` positional arguments can include expressions, transforms of
the model field, or the names of model fields. They will be converted to a
