{% if related and notes %}
  <section>
    <h2>Related</h2>

    <ul>
      {% for note in notes if related|filter((title) => title == note.title) %}
        <li>
          <a href="{{ note.url|trim('/', 'right') }}">{{ note.title }}</a>
        </li>
      {% endfor %}
    </ul>
  </section>
{% endif %}