<ul>

{% for link in include.social %}
  {% assign platform = link.first | downcase %}
  {% assign username = link.last %}
  {% assign data_social = site.data.social[platform] %}
  {% assign icon = data_social.icon | append:".html" | prepend:"icons/" %}

  {% if username contains "//" %}
    {% assign url = username %}
  {% else %}
    {% assign url = username | prepend:data_social.prepend %}
  {% endif %}

  <li>
    <a href="{{ url }}">
      <span class="social-button" id="{{ data_social.icon }}" title="{{ data_social.name }}">{% include {{icon}} %}</span>
    </a>
  </li>
{% endfor %}

</ul>