Fixed #16516 -- Relaxed the blocktrans rendering a little by falling back to...

        result = re.sub(u'%(?!\()', u'%%', result)

        data = dict([(v, _render_value_in_context(context.get(v, ''), context)) for v in vars])

        context.pop()

        return result % data

        try:

            result = result % data

        except KeyError:

            with translation.override(None):

                result = self.render(context)

        return result

class LanguageNode(Node):

        self.old_language = get_language()

    def __enter__(self):

        if self.language is not None:

            activate(self.language)

        else:

            deactivate_all()

    def __exit__(self, exc_type, exc_value, traceback):

        if self.deactivate:

    useful when we want delayed translations to appear as the original string

    for some reason.

.. function:: override(language)

.. function:: override(language, deactivate=False)

    .. versionadded:: 1.4

    A Python context manager that uses

    :func:`django.utils.translation.activate` to fetch the translation object

    for a given language, installing it as the translation object for the

    current thread and deinstalls it again on exit with

    :func:`django.utils.translation.deactivate`.

    current thread and reinstall the previous active language on exit.

    Optionally it can simply deinstall the temporary translation on exit with

    :func:`django.utils.translation.deactivate` if the deactivate argument is

    True. If you pass None as the language argument, a NullTranslations()

    instance is installed while the context is active.

.. function:: get_language()

.. note:: The previous more verbose format is still supported:

   ``{% blocktrans with book|title as book_t and author|title as author_t %}``

.. versionchanged:: 1.4

If resolving one of the block arguments fails, blocktrans will fall back to

the default language by deactivating the currently active language

temporarily with the :func:`~django.utils.translation.deactivate_all`

function.

This tag also provides for pluralization. To use it:

    * Designate and bind a counter value with the name ``count``. This value will