Change line items controller HTML response spec to look for form order_edit class

app/views/spree/admin/orders/_form.html.haml

@@ -1,4 +1,4 @@
-%div.admin_order_form_fields
+%div
   - if @line_item.try(:errors).present?
     = render partial: 'spree/shared/error_messages', locals: { target: @line_item }
   = form_for @order, url: admin_order_url(@order), method: :put do |f|

spec/controllers/spree/admin/line_items_controller_spec.rb

@@ -90,7 +90,7 @@ describe Spree::Admin::LineItemsController, type: :controller do
 
           it 'returns an HTML response with the order form' do
             spree_put :update, params
-            expect(response.body).to match(/admin_order_form_fields/)
+            expect(response.body).to match(/edit_order/)
           end
         end
       end