addCssToHead(document);
        addJavascriptToHead(document);
        addHighlightJsToHead(document);

        wrapH2InSectionTopic(document);
        document.body().prepend("<h1>Gradle Release Notes</h1>");
        addTOC(document);
        wrapContentInContainer(document);

        cleanUpIssueLinks(document);
        handleVideos(document);
        removeLeftoverComments(document);

     *
     * @param prefix the prefix to add before each line number
     * @param content the content to add line numbers to
     * @return the content with line numbers prepended, or empty string if content is blank
     */
    public String appendLineNumber(final String prefix, final String content) {
        if (StringUtil.isBlank(content)) {
            return StringUtil.EMPTY;
        }

        // Valid base URL with malformed relative: java.net.URL is lenient, resolves anyway
        final String value = transformer.normalizeCanonicalUrl("http://example.com/", "://");
        // java.net.URL(base, "://") prepends protocol, result may vary
        // The key point: no exception is thrown and a result is returned
        assertNotNull(value);
    }

    @Test