reateElement('code');
                    code.className = 'language-' + language;
                    pre.textContent = '';
                    pre.setAttribute('data-line', line)
                    code.textContent = 'Loading…';
                    pre.appendChild(code);

                    var xhr = new XMLHttpRequest();

                    xhr.open('GET', src, true);

                    xhr.onreadystatechange = function () {
                        if (xhr.readyState !== 4) {
                     