Available HTML-tags:
<b>bold</b>, <strong>bold</strong>
<i>italic</i>, <em>italic</em>
<a href="
http://www.example.com/">inline URL</a>
<code>inline fixed-width code</code>
<pre>pre-formatted fixed-width code block</pre>
* Only the tags mentioned above are currently supported.
* Tags must not be nested.
* All <, > and & symbols that are not a part of a tag or an HTML entity must be replaced with the corresponding HTML entities (< with <, > with > and & with &).
* All numerical HTML entities are supported.
* The API currently supports only the following named HTML entities: <, >, & and ".