anchor.diff:          <li>
             <%= main_navigation_link_to "Get involved",
                 get_involved_path,
  +              class: "govuk-link govuk-link--inverse",
                 data: {
                   track_category: "headerClicked",
                   track_action: "governmentactivityLink",
  
positive.code:         </li>
          <li>
            <a href="/search/research-and-statistics"
               data-track-category="headerClicked"
               data-track-action="governmentactivityLink"
               data-track-label="/search/research-and-statistics"
  
negative.code:         </li>
          <li>
            <a href="/search/news-and-communications"
               class="govuk-link govuk-link--inverse"
               data-track-category="headerClicked"
               data-track-action="governmentactivityLink"
               data-track-label="/search/news-and-communications"
  