site/_includes/config.html

{% assign configs = site.data.config[include.id] %}
{% for group in configs.groups %}
<h2 id="{{ group.name | slugify }}">{{ group.name }}</h2>

{% if group.description %}{{ group.description | markdownify }}{% endif %}

<table>
  <thead>
    <tr>
      <th>Parameter</th>
      <th>Description</th>
      <th>Default</th>
    </tr>
  </thead>
  <tbody>
    {% for param in group.params %}
    <tr id="{{ param.param }}">
      <td><code>{{ param.param }}</code></td>
      <td>{{ param.description | markdownify }}</td>
      <td>{% if param.default %}<code>{{ param.default }}</code>{% endif %}</td>
    </tr>
    {% endfor %} <!-- for param in group.params -->
  </tbody>
</table>
{% endfor %} <!-- for group in configs.groups -->