<footer> © 2017 {% if site.email %}
<a href="mailto:{{ site.email }}">{% if site.author %}{{ site.author | escape }}{% else %}{{ site.title | escape }}{% endif %}</a>.
{% else %}
{% if site.author %}{{ site.author | escape }}{% else %}{{ site.title | escape }}{% endif %}.
{% endif %} Powered by Jekyll & Tashoku. </footer>