Fixed #21650 -- Corrected bad advice for plural translation.

In this example the number of objects is passed to the translation

languages as the ``count`` variable.

Lets see a slightly more complex usage example::

Note that pluralization is complicated and works differently in each language.

Comparing ``count`` to 1 isn't always the correct rule. This code looks

sophisticated, but will produce incorrect results for some languages::

    from django.utils.translation import ungettext

    from myapp.models import Report

        'name': name

    }

Here we reuse localizable, hopefully already translated literals (contained in

the ``verbose_name`` and ``verbose_name_plural`` model ``Meta`` options) for

other parts of the sentence so all of it is consistently based on the

cardinality of the elements at play.

Don't try to implement your own singular-or-plural logic, it won't be correct.

In a case like this, consider something like the following::

    text = ungettext(

        'There is %(count)d %(name)s object available.',

        'There are %(count)d %(name)s objects available.',

        count

    ) % {

        'count': count,

        'name': Report._meta.verbose_name,

    }

.. _pluralization-var-notes:

.. note::

    When using this technique, make sure you use a single name for every

    extrapolated variable included in the literal. In the example above note how

    we used the ``name`` Python variable in both translation strings. This

    example would fail::

        from django.utils.translation import ungettext

        from myapp.models import Report

    When using ``ungettext()``, make sure you use a single name for every

    extrapolated variable included in the literal. In the examples above, note

    how we used the ``name`` Python variable in both translation strings. This

    example, besides being incorrect in some languages as noted above, would

    fail::

        count = Report.objects.count()

        d = {

            'count': count,

            'name': Report._meta.verbose_name,

            'plural_name': Report._meta.verbose_name_plural

        }

        text = ungettext(

            'There is %(count)d %(name)s available.',

            'There are %(count)d %(plural_name)s available.',

            count

        ) % d

        ) % {

            'count': Report.objects.count(),

            'name': Report._meta.verbose_name,

            'plural_name': Report._meta.verbose_name_plural

        }

    You would get an error when running :djadmin:`django-admin.py

    compilemessages <compilemessages>`::