Fixed "indentation is not a multiple of four" pep8 issues.

        # settings.MESSAGE_TAGS, we need to update that constant too.

        self.old_level_tags = base.LEVEL_TAGS

        base.LEVEL_TAGS = utils.get_level_tags()

    def disable(self):

        super(override_settings_tags, self).disable()

        base.LEVEL_TAGS = self.old_level_tags

@python_2_unicode_compatible

class Category(models.Model):

    name = models.CharField(max_length=20)

    class Meta:

        ordering = ('name',)

    def __str__(self):

        return self.name

@python_2_unicode_compatible

class Article(models.Model):

    headline = models.CharField(max_length=50)

    pub_date = models.DateTimeField()

    primary_categories = models.ManyToManyField(Category, related_name='primary_article_set')

    secondary_categories = models.ManyToManyField(Category, related_name='secondary_article_set')

    class Meta:

        ordering = ('pub_date',)

    def __str__(self):

        return self.headline

    having = models.CharField(max_length=1)

    where = models.DateField(max_length=1)

    has_hyphen = models.CharField(max_length=1, db_column='has-hyphen')

    class Meta:

        db_table = 'select'