anchor.diff:          <li>
             <%= main_navigation_link_to "How government works",
                 how_government_works_path,
  +              class: "govuk-link govuk-link--inverse",
                 data: {
                   track_category: "headerClicked",
                   track_action: "governmentactivityLink",
  
positive.code:         <li>
            <%= main_navigation_link_to "Departments",
                organisations_path,
                data: {
                  track_category: "headerClicked",
                  track_action: "departmentsLink",
  
negative.code:         <li>
            <%= main_navigation_link_to "Worldwide",
                world_locations_path(locale: :en),
                class: "govuk-link govuk-link--inverse",
                data: {
                  track_category: "headerClicked",
                  track_action: "worldwideLink",
  