pandoc-2.17: test/command/7416.md

```
% pandoc -f markdown -t html
![caption](../media/rId25.jpg "title"){alt="alt"}

^D
<figure>
<img src="../media/rId25.jpg" title="title" alt="alt" />
<figcaption>caption</figcaption>
</figure>
```

```
% pandoc -f markdown -t html
![caption](../media/rId25.jpg "title")

^D
<figure>
<img src="../media/rId25.jpg" title="title" alt="caption" />
<figcaption aria-hidden="true">caption</figcaption>
</figure>
```