pandoc/test/command/4677.md

% pandoc --to "markdown-bracketed_spans-fenced_divs-link_attributes-simple_tables-multiline_tables-grid_tables-pipe_tables-fenced_code_attributes-markdown_in_html_blocks-table_captions-smart"
![Caption](img.png){#img:1}
^D
<figure>
<img src="img.png" id="img:1" alt="" /><figcaption>Caption</figcaption>
</figure>