pandoc-3.0: test/command/8243.md

```
% pandoc -f latex
\newenvironment{topics}{
\newcommand{\topic}[2]{ \item{##1 / ##2} }
Topics:
\begin{itemize}
}
{
\end{itemize}
}

\begin{topics}
\topic{Foo}{Bar}
\topic{Baz}{Bim}
\end{topics}
^D
<p>Topics:</p>
<ul>
<li><p><span>Foo / Bar</span></p></li>
<li><p><span>Baz / Bim</span></p></li>
</ul>
```