anchor.diff:          <% order.adjustments.eligible.each do |adjustment| %>
           <% next if (adjustment.source_type == 'Spree::TaxRate') and (adjustment.amount == 0) %>
             <tr class="total">
  -            <td><%= adjustment.label %>: </td>
  +            <td><%= adjustment.label %>:</td>
               <td><%= adjustment.display_amount.to_html %></td>
             </tr>
           <% end %>
  
positive.code:         <tbody data-hook="order_details_shipment_promotion_adjustments">
            <% order.shipment_adjustments.promotion.eligible.group_by(&:label).each do |label, adjustments| %>
              <tr class="total">
                <td><%= label %></td>
                <td><%= Spree::Money.new(adjustments.sum(&:amount), currency: order.currency).to_html %></td>
              </tr>
            <% end %>
  
negative.code: 
      <% if order.checkout_steps.include?("delivery") && order.shipments.any? %>
        <tr data-hook="shipping_total">
          <td><%= Spree.t(:shipping_total) %>:</td>
          <td><%= Spree::Money.new(order.shipments.to_a.sum(&:cost), currency: order.currency).to_html %></td>
        </tr>
  
  