pandoc/test/command/setext-fenced-div.md

```
% pandoc -t native
::: {.cell}
---
:::
^D
[ Div ( "", [ "cell" ], [] ) [ HorizontalRule ] ]
```
Markdown reader: fenced div takes priority over setext header. For ::: {.cell} --- ::: 2019-03-28 17:39:22 -07:00			```
			`% pandoc -t native`
			`::: {.cell}`
			`---`
			`:::`
			`^D`
Use pretty-simple to format native output. Previously we used our own homespun formatting. But this produces over-long lines that aren't ideal for diffs in tests. Easier to use something off-the-shelf and standard. Closes #7580. Performance is slower by about a factor of 10, but this isn't really a problem because native isn't suitable as a serialization format. (For serialization you should use json, because the reader is so much faster than native.) 2021-09-19 12:09:51 -07:00			`[ Div ( "", [ "cell" ], [] ) [ HorizontalRule ] ]`
Markdown reader: fenced div takes priority over setext header. For ::: {.cell} --- ::: 2019-03-28 17:39:22 -07:00			```