\begin{verbatim}
#!/bin/bash
echo "test"
    \end{verbatim}

  \begin{lstlisting}
Indent
  should
    not affect verbatim environments!
    \end{lstlisting}

  \begin{markdown}
An h1 header
============

Paragraphs are separated by a blank line.

2nd paragraph.
*Italic*, **bold**, and `monospace`.
Itemized lists look like:

* this one
* that one
* the other one
 \end{markdown}