Escaping wiki markup?

"Zsolt Koppany" <[email protected]> Thu, 20 Sep 2007 10:38:00 +0200

Newsgroups	gmane.comp.java.jspwiki.user
Message-ID	<[email protected]>

Hi,

how can I escape wike markup?

For example I want to get in the html output "__hello__" and NOT
"<B>hello</B>".

Zsolt