r <code>_</code>&apos;s will be wrapped with an HTML
<code>&lt;strong&gt;</code> tag. E.g., this input:</p>

<pre><code>*single asterisks*

_single underscores_

**double asterisks**

__double underscores__
</code></pre>

<p>will produce:</p>

<pre><code>&lt;em&gt;single asterisks&lt;/em&gt;

&lt;em&gt;single underscores&lt;/em&gt;

&lt;strong&gt;double asterisks&lt;/strong&gt;

&lt;strong&gt;double underscores&lt;/strong&gt;
</code></pre>

<p>You can use whichever style you prefer; the lone restriction is 