{#- A link to this page's markdown twin (WP-1980), where pydata puts "Show Source"
    (WP-2021).  The twin is the copy an agent reads, so a person checking what an agent
    was given opens the same file.  It sits beside the page as `<page>.html.md`
    (`docs/markdown_twin.py`); a page with no source, such as search, has none. -#}
{% if sourcename %}
<div class="tocsection rietx-twin">
  <a href="{{ pagename.split('/')[-1] }}{{ file_suffix }}.md">This page as markdown</a>
</div>
{% endif %}