Just a small typo at the bottom of the page: there is an opening square brace but no ending brace.
http://tapestry.apache.org/tapestry5/tapestry-core/ref/org/apache/tapestry5/corelib/components/ActionLink.html <p> [<t:actionlink t:id="delete" context="accountContext">delete</t:actionlink> </p>
