add a spacer in the sidebar

_layouts/default.html

@@ -52,7 +52,7 @@ <h2>{{ site.description | default: site.github.project_tagline }}</h2>
               <img height='36' style='border:0px;height:36px;' src='https://cdn.ko-fi.com/cdn/kofi5.png?v=2' border='0' alt='Buy Me a Coffee at ko-fi.com' />
             </a>
           {% endif %}
-
+          <hr />
           {% if site.github.is_project_page %}
             <p class="repo-owner"><a href="{{ site.github.repository_url }}">{{ site.github.repository_name }}</a> is maintained by <a href="{{ site.github.owner_url }}">{{ site.github.owner_name }}</a>.</p>
           {% endif %}