Fixed #11138 -- Corrected the description of behavior related to the max_num...

As with regular formsets, you can use the ``max_num`` parameter to

``modelformset_factory`` to limit the number of forms displayed. With

model formsets, this properly limits the query to select only the maximum

model formsets, this property limits the query to select only the maximum

number of objects needed::

    >>> Author.objects.order_by('name')

    >>> formset.initial

    [{'id': 1, 'name': u'Charles Baudelaire'}, {'id': 3, 'name': u'Paul Verlaine'}]

If the value of ``max_num`` is less than the total objects returned, the

formset will fill the rest with extra forms::

If the value of ``max_num`` is higher than the number of objects returned, up to 

``extra`` additional blank forms will be added to the formset, so long as the 

total number of forms does not exceed ``max_num``::

    >>> AuthorFormSet = modelformset_factory(Author, max_num=4, extra=1)

    >>> AuthorFormSet = modelformset_factory(Author, max_num=4, extra=2)

    >>> formset = AuthorFormSet(queryset=Author.objects.order_by('name'))

    >>> for form in formset.forms:

    ...     print form.as_table()