<p>*not emphasized*
\<em>emphasis</em>
**not bold**
&lt;br/&gt; not a tag
[link](/foo) not a link
<a href="/foo)" title="title&quot;">link</a>
`not code`</p>
<p>1. not a list item</p>
<p>* not a list.</p>
<p># Not a header</p>
<p>[foo]: /url &quot;not a reference&quot;</p>
<p>$ ^ ; can be escaped.
\a \b \T cannot.
unicode letters and symbols cannot: \π \‥.</p>