you can say <code>quiz_dir = NULL</code>
to skip all quiz steps.</p>
</div>
<div class="section level3">
<h3 id="about-the-output-files">About the output files<a class="anchor" aria-label="anchor" href="#about-the-output-files"></a>
</h3>
<p>Leanpub’s Github writing mode will look for a directory called
<code>manuscript</code> to publish from. You should not edit the files
in <code>manuscript/</code> by hand since a re-run of
<code>ottrpal</code> will cause your changes to be overwritten.</p>
</div>
<div 