{% comment %}
  Sorting can be done in _config.yml with Jekyll 4.0 or later.
{% endcomment %}
{% assign note_list = site.notes | sort_natural: 'title' %}
<div class="list-group wide-enough">
  {% assign h = 'h4' %}
  {% if include.sidebar %}
    {% assign h = 'h5' %}
  {% endif %}
  {% if include.sidebar %}
  <div class="list-group-item disabled">
    <h4 class="list-group-item-heading">notes</h4>
  </div>
  {% endif %}
  {% for note in note_list %}
  <a href="{{ note.url | relative_url }}" class="list-group-item">
    <{{ h }} class="list-group-item-heading post-header">
      <span class="text-monospace">{{ note.title }}</span>
      <small>{{ note.subtitle }}</small>
    </{{ h }}>
  </a>
  {% endfor %}
</div>