rms-support-letter.github.io/_includes/signatures.html

<p><b>Signed by {{ site.data.signed.size }} individuals:</b></p>
<ol>
{% capture signs %}
  {% for sign_hash in site.data.signed %}
    {% assign signature = sign_hash[1] %}
    |{{signature.name | escape }}#{{signature.link | escape }}
  {% endfor %}
{% endcapture %}
{% assign sorted_signs = signs | split: '|' | sort_natural %}
{% for signature in sorted_signs %}
  {% assign sign_items = signature | split: '#' %}
  {% if sign_items[0] and sign_items[1] %} 
  <li><a href="{{ sign_items[1] | strip }}">{{ sign_items[0] | strip }}</a></li>
  {% endif %} 
{% endfor %}
</ol>