Preview:
<div class="alert alert-block alert-warning" style="border-radius:8px; box-shadow: rgba(0, 0, 0, 0.1) 0px 1px 3px 0px, rgba(0, 0, 0, 0.06) 0px 1px 2px 0px;">
    <b>!&#x20DD; Important<br /></b> Use yellow boxes if you to underline important things.
</div>
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