pandoc-2.2: test/command/4527.md

# Raw TeX blocks in CommonMark with and without raw_tex

```
% pandoc -f latex -t commonmark-raw_tex
\someunknowncommand

Hello.
^D
Hello.
```

```
% pandoc -f latex -t commonmark+raw_tex
\someunknowncommand

Hello.
^D
\someunknowncommand

Hello.
```