Ace Editor

    <script>
        var editor = ace.edit("editor");

        //qui sotto l'errore "Unexpected token ILLEGAL"
        var content = "<#if theme?? && theme.css??>${theme.css?trim?replace('\n', '\\u000A')!}</#if>";

        editor.setTheme("ace/theme/twilight");
        session = editor.session;
        session.setNewLineMode("unix");
        JSON.stringify(session.doc.getNewLineCharacter());
        session.doc.getValue().indexOf("\n") == -1;
        editor.getSession().setMode("ace/mode/css");
        editor.setValue(content);
    </script>