anchor.diff:  
       <% if can? :update, @order %>
         <li<%== ' class="active"' if current == 'Shipments' %> data-hook='admin_order_tabs_shipment_details'>
  -        <%= link_to_with_icon 'shipment', Spree.t(:shipments), edit_admin_order_url(@order) %>
  +        <%= link_to_with_icon 'road', Spree.t(:shipments), edit_admin_order_url(@order) %>
         </li>
       <% end %>
   
  
positive.code:     <% if can? :index, Spree::ReturnAuthorization %>
        <% if @order.completed? %>
          <li<%== ' class="active"' if current == 'Returns' %> data-hook='admin_order_tabs_return_authorizations'>
            <%= link_to_with_icon 'return', Spree.t(:returns), admin_order_return_authorizations_url(@order) %>
          </li>
        <% end %>
      <% end %>
  
negative.code:     <% if can? :index, Spree::CustomerReturn %>
        <% if @order.completed? %>
          <li<%== ' class="active"' if current == 'Customer Returns' %>>
            <%= link_to_with_icon 'transfer', Spree.t(:customer_returns), admin_order_customer_returns_url(@order) %>
          </li>
        <% end %>
      <% end %>
  
      <% if can? :update, @order %>
        <li<%== ' class="active"' if current == 'State Changes' %> data-hook='admin_order_tabs_state_changes'>
          <%= link_to_with_icon 'refresh', Spree::StateChange.human_attribute_name(:state_changes), admin_order_state_changes_url(@order) %>
        </li>
      <% end %>
    </ul>
  