layout-a.htex source file:
<!layout /.includes/layout.htex>
<article>
<h2>layout a</h2>
<ul>
<li><a href="/demos/layout-a/">/demos/layout-a/</a>
<li><a href="/demos/layout-b/">/demos/layout-b/</a>
<li><a href="/demos/layouts/">/demos/layouts/</a>
</ul>
</article>
<!content>
<article>
<code>layout-a.htex</code> source file:
<pre><code class="language-html"><!include-escaped layout-a.htex></code></pre>
</article>