``filter``
==========
Filter sections allow you to apply regular Twig filters on a block of template
data. Just wrap the code in the special ``filter`` section:
.. code-block:: jinja
{% filter upper %}
This text becomes uppercase
{% endfilter %}
You can also chain filters:
.. code-block:: jinja
{% filter lower|escape %}
<strong>SOME TEXT</strong>
{% endfilter %}
{# outputs "<strong>some text</strong>" #}
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