docs/theme/mkdocs/autoindex.html

# Table of Contents

{% for nav_item in nav %}
  {% if nav_item.children %}
## {{ nav_item.title }} {{ nav_item.url }}

  {% for nav_item in nav_item.children %}
- [{{ nav_item.title }}]({{ nav_item.url }})
  {% endfor %}

  {% endif %}
{% endfor %}