android.moparisthebest.org/source/_includes/sidebars/sections/google_plus.html

{% if site.google_plus_user %}
  <a href="https://plus.google.com/{{ site.google_plus_user }}?rel=author">
    <img src="https://ssl.gstatic.com/images/icons/gplus-{{ site.google_plus_image_size}}.png" alt="Google Plus icon">
  </a>
{% endif %}