Fixed #26132 -- Discouraged use of TransactionTestCase.fixtures.

.. attribute:: TransactionTestCase.fixtures

A test case for a database-backed website isn't much use if there isn't any

data in the database. To make it easy to put test data into the database,

Django's custom ``TransactionTestCase`` class provides a way of loading

**fixtures**.

data in the database. Tests are more readable and it's more maintainable to

create objects using the ORM, for example in :meth:`TestCase.setUpTestData`,

however, you can also use fixtures.

A fixture is a collection of data that Django knows how to import into a

database. For example, if your site has user accounts, you might set up a