--TEST--
"block" tag
--TEMPLATE--
{% extends "foo.twig" %}

{% block content %}
    {% block subcontent %}
        {% block subsubcontent %}
            SUBSUBCONTENT
        {% endblock %}
    {% endblock %}
{% endblock %}
--TEMPLATE(foo.twig)--
{% block content %}
    {% block subcontent %}
        SUBCONTENT
    {% endblock %}
{% endblock %}
--DATA--
return []
--EXPECT--
SUBSUBCONTENT