fails:CGI::HtmlExtension#a when passed a String includes the passed block's return value when passed a block
fails:CGI::HtmlExtension#a when passed a Hash includes the passed block's return value when passed a block
fails:CGI::HtmlExtension#a when each HTML generation returns the doctype declaration for HTML3
fails:CGI::HtmlExtension#a when each HTML generation returns the doctype declaration for HTML4
fails:CGI::HtmlExtension#a when each HTML generation returns the doctype declaration for the Transitional version of HTML4
