list sub-pages in the section template

shown for /tutorials/exercises/ as example

Author: jasalt

templates/section.html

@@ -7,6 +7,16 @@
     {% block content %}
     <div class="page__content">
         {{ section.content | safe }}
+        
+        {% if section.pages %}
+        <ul>
+            {% for page in section.pages %}
+            <li>
+                <a href="{{ page.permalink }}">{{ page.title }}</a>
+            </li>
+            {% endfor %}
+        </ul>
+        {% endif %}
     </div>
     {% endblock %}