private function escape_token_string(&$text, $token) {
        $text = str_replace("~".$token, $this->protect($token), $text);
    }
private function escape_token_string(&$text, $token) {
        $text = str_replace("~".$token, $this->protect($token), $text);
    }
private function escape_token_string ( & $ text , $ token ) { $ text = str_replace ( "~" . $ token , $ this -> protect ( $ token ) , $ text ) ; }
Escape token when it is "negated"
Escape token when it is negated