fails:CGI::HtmlExtension#password_field when passed no arguments returns an password-'input'-element without a name
fails:CGI::HtmlExtension#password_field when passed no arguments ignores a passed block
fails:CGI::HtmlExtension#password_field when passed name returns an password-'input'-element with the passed name
fails:CGI::HtmlExtension#password_field when passed name ignores a passed block
