remove .md ext in menu

templates/main.html

@@ -24,8 +24,9 @@
             <h1>{{garden_title}}</h1>
             <ul>
                 {% for file in files %}
-                <li class="{% if file is containing(".md") %}page{% else %}file{% endif %}"><a
-                        href="/{{file}}">{{file}}</a></li>
+                <li class="{% if file is containing(".md") %}page{% else %}file{% endif %}">
+                    <a href="/{{file}}">{{file | trim_end_matches(pat=".md")}}</a>
+                </li>
                 {% endfor %}
             </ul>
         </nav>