home-assistant.io/source/_includes/post/author.html

{% if post.author %}
  {% assign author = post.author %}
{% elsif page.author %}
  {% assign author = page.author %}
{% else %}
  {% assign author = site.author %}
{% endif %}
{% if author %}<span class="byline author vcard"><i class='icon-user'></i> {{ author }}</span>{% endif %}