Fix "View this file on GitHub" links to work even when the default branch is not `master`
</h1>
<ul>
- <li><a href="{{ site.github.repository_url }}/blob/master/{{ page.data.path }}">View this file on GitHub</a></li>
+ <li><a href="{{ site.github.repository_url }}/blob/{{ site.github.default_branch }}/{{ page.data.path }}">View this file on GitHub</a></li>
<li>Last update: {{ page.data.timestamp }}</li>
{% if page.data.attributes.PROBLEM %}
<li>Problem: <a href="{{ page.data.attributes.PROBLEM }}">{{ page.data.attributes.PROBLEM }}</a></li>
