{% regroup articles by section as grouped_articles %}
{% for section, section_articles in grouped_articles %}

    {% if level == "deep" %}
    <h3 class="em">
        {% if section.plural and section_articles|length >= 2 %}
            {{ section.plural }}
        {% else %}
            {{ section.name }}
        {% endif %}
    </h3>
    {% else %}
    <h2 class="em">
        {% if section.plural and section_articles|length >= 2 %}
            {{ section.plural }}
        {% else %}
            {{ section.name }}
        {% endif %}
    </h2>
    {% endif %}

    {% for article in section_articles %}
        {% include "elements/article_listing.html" with article=article level=level %}
    {% endfor %}
{% endfor %}