pandoc/test/command/4016.md

```
pandoc -t beamer
# Level 2 blocks

<div class="columns">
<div class="column" width="40%">
## Block one
- Item
</div>
<div class="column" width="60%">
## Block two
- Item
</div>
</div>
^D
\begin{frame}{Level 2 blocks}
\protect\hypertarget{level-2-blocks}{}
\begin{columns}[T]
\begin{column}{0.4\textwidth}
\begin{block}{Block one}
\protect\hypertarget{block-one}{}
\begin{itemize}
\tightlist
\item
  Item
\end{itemize}
\end{block}
\end{column}

\begin{column}{0.6\textwidth}
\begin{block}{Block two}
\protect\hypertarget{block-two}{}
\begin{itemize}
\tightlist
\item
  Item
\end{itemize}
\end{block}
\end{column}
\end{columns}
\end{frame}
```