Updated a code block to use the emphasize-lines Sphinx option

:attr:`managed <django.db.models.Options.managed>` one. For example, consider

this generated model definition:

.. parsed-literal::

.. code-block:: python

    :emphasize-lines: 5

    class Person(models.Model):

        id = models.IntegerField(primary_key=True)

        first_name = models.CharField(max_length=70)

        class Meta:

            **managed = False**

           managed = False

           db_table = 'CENSUS_PERSONS'

If you wanted to modify existing data on your ``CENSUS_PERSONS`` SQL table