Upper line text.<br />
<div class="js-spoilerbox bbcode-spoilerbox"><button class="js-spoilerbox__link bbcode-spoilerbox__link" type="button"><span class="bbcode-spoilerbox__link-icon"></span>First!</button><div class="bbcode-spoilerbox__body">Packed box.</div></div>
Bottom line text.<br />
<br />
Prefix text.
<div class="js-spoilerbox bbcode-spoilerbox"><button class="js-spoilerbox__link bbcode-spoilerbox__link" type="button"><span class="bbcode-spoilerbox__link-icon"></span>Second box</button><div class="bbcode-spoilerbox__body">Inline box (except it's not).</div></div>
Suffix text.<br />
<br />
Upper line text.<br />
<br />
<div class="js-spoilerbox bbcode-spoilerbox"><button class="js-spoilerbox__link bbcode-spoilerbox__link" type="button"><span class="bbcode-spoilerbox__link-icon"></span>Third box</button><div class="bbcode-spoilerbox__body">Box with blank lines.</div></div>
<br />
Bottom line text.