 tag that dumps the available variables,
filters, and tests.

.. code-block:: html+jinja

    <pre>{% debug %}</pre>

.. code-block:: text

    {'context': {'cycler': <class 'jinja2.utils.Cycler'>,
                 ...,
                 'namespace': <class 'jinja2.utils.Namespace'>},
     'filters': ['abs', 'attr', 'batch', 'capitalize', 'center', 'count', 'd',
                 ..., 'urlencode', 'urlize', 'wordcount', 'wordwrap', 'xmlattr'],
     'tests': ['!=', '<', '<=', '==', '>', '>=', 'callable', 'defined',
               ..., 'odd', 'sameas', 'sequence', 'string', 'undefined', 'upper']}

.. versionadded:: 2.11.0
