Fixed typo in module name and added missing end.

app/controllers/concerns/current_cart.rb

@@ -1,4 +1,4 @@
-module CurrentCard
+module CurrentCart
 
   private
     def set_cart
@@ -6,4 +6,5 @@ module CurrentCard
     rescue ActiveRecord::RecordNotFound
       @cart = Cart.create
       session[:cart_id] = @cart.id
+    end
 end