anchor.diff:          add-bottom-margin" role="banner">
           <div class="<%= content_for?(:full_width) ? 'container-fluid' : 'container' %>">
             <div class="navbar-header">
  -            <% if content_for?(:navbar_right) || content_for?(:navbar_items) %>
  +            <% if has_navbar_content %>
                 <%# Bootstrap toggle for collapsed navbar content, used at smaller widths %>
                 <a class="navbar-toggle" data-toggle="collapse" data-target="header .navbar-collapse">
                   <span class="sr-only">Toggle navigation</span>
  
positive.code:               </div>
              <% end %>
            </div>
            <% if GovukAdminTemplate::Config.show_signout || content_for?(:navbar_right) || content_for?(:navbar_items) %>
              <nav role="navigation" class="collapse navbar-collapse">
                <% if content_for?(:navbar_items) %>
                  <ul class="nav navbar-nav">
  
negative.code:   environment_label = GovukAdminTemplate.environment_label
    app_home_path = content_for?(:app_home_path) ? yield(:app_home_path) : root_path
    app_title = content_for?(:app_title) ? yield(:app_title) : GovukAdminTemplate::Config.app_title
    has_navbar_content = GovukAdminTemplate::Config.show_signout || content_for?(:navbar_right) || content_for?(:navbar_items)
  %>
  <!DOCTYPE html>
  <!--[if lte IE 7]><html class="no-js lte-ie7" lang="en"><![endif]-->
  