Fixed #6944 -- Fixed a small typo in docs/model-api.txt. Thanks, julien

If ``True``, this field must be unique throughout the table.

This is enforced at the database level and at the Django admin-form level. If

you try to add save a model with a duplicate value in a ``unique`` field, a

you try to save a model with a duplicate value in a ``unique`` field, a

``django.db.IntegrityError`` will be raised by the model's ``save()`` method.

``unique_for_date``