Added an ordering definition to make test output reliable across database backends.

class Author(models.Model):

    name = models.CharField(max_length=100)

    class Meta:

        ordering = ('name',)

    def __unicode__(self):

        return self.name

...     instance.save()

>>> formset.save_m2m()

>>> instances[0].authors.all()

[<Author: Charles Baudelaire>, <Author: Walt Whitman>, <Author: Paul Verlaine>, <Author: John Steinbeck>]

[<Author: Charles Baudelaire>, <Author: John Steinbeck>, <Author: Paul Verlaine>, <Author: Walt Whitman>]

# delete the author we created to allow later tests to continue working.

>>> new_author.delete()