index) => {
            if (index % columns === 0) {
                r.push([]);
            }
            r[r.length - 1].push(element);
            return r;
        }, []).map((row, i) => {
            return (
                <div key={i} className="row my-3">
                    {row}
                </div>
            );
        })

        React.useEffect(() => {
            hljs.highlightAll();
        }, []);

        return (
            <div
                className={`tab-pane fade ${props.chapt