:</p><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.21/img/icons.svg#callout-warning"/></svg></div><div class=content>A warning from a boilerplate</div></aside></div></li><li><p>Boilerplate with only a <code>shortcode</code> with a nested text block:</p><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.21/img/icons.svg#callout-warning"/></svg></div><div class=content><p>A warning from a boilerplate</p><pre><code