pandoc-2.9: test/command/5967.md
```
% pandoc --toc --toc-depth=3 -s -t plain
# One
## Two
#### Four
^D
- One
- Two
One
Two
Four
```
```
% pandoc --toc --toc-depth=3 -s -t plain
# One
## Two
#### Four
^D
- One
- Two
One
Two
Four
```