doc.documentElement.bookinfo[0]?.appendChild(releaseInfo)
    }

    def fixProgramListings(Document doc) {
        doc.documentElement.depthFirst().findAll { it.name() == 'programlisting' || it.name() == 'screen' }.each {Element element ->
            element.setTextContent(normalise(element.getTextContent()))
        }
    }

    static String normalise(String content) {

            if (!"pre".equals(element)) {
                return false;
            }
            Element newElement = document.createElement("programlisting");
            //we're making an assumption that all <pre> elements contain java code
            //this should mostly be true :)
            //if it isn't true then the syntax highlighting won't spoil the view too much anyway