indented_details.html

<details>

<h2 id="heading">Heading</h2>
</details>

<h2 id="heading-1">Heading</h2>
<custom-tag>

<h2 id="heading-2">Heading</h2>
</custom-tag>

<h2 id="heading-3">Heading</h2>
<details>

<pre><code>## Heading</code></pre>
</details>

<pre><code>## Heading</code></pre>
<custom-tag>

<pre><code>## Heading</code></pre>
</custom-tag>

<pre><code>## Heading</code></pre>