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{%- macro toctree(navlist) -%}
<ol>
{%- for nav in navlist %}
  <li>
    <a href="{{ nav.refuri }}">{{ nav.text }}</a>
    {%- if nav.children %}
{{ toctree(nav.children)|indent(4, true) }}
    {%- endif %}
  </li>
{%- endfor %}
</ol>
{%- endmacro -%}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:epub="http://www.idpf.org/2007/ops" lang="{{ lang }}" xml:lang="{{ lang }}">
  <head>
    <title>{{ toc_locale }}</title>
  </head>
  <body>
    <nav epub:type="toc">
      <h1>{{ toc_locale }}</h1>
{{ toctree(navlist)|indent(6, true) }}
    </nav>
  </body>
</html>