Add missing newlines at the end of files.

Author: dysk

rails_application/app/read_models/returns/add_item_to_return.rb

@@ -21,4 +21,4 @@ def call(event)
 
   # Backward compatibility alias
   AddItemToRefund = AddItemToReturn
-end
+end

rails_application/app/read_models/returns/configuration.rb

@@ -42,4 +42,4 @@ def call(event_store)
   # Backward compatibility aliases
   Refund = Return
   RefundItem = ReturnItem
-end
+end

rails_application/app/read_models/returns/create_draft_return.rb

@@ -7,4 +7,4 @@ def call(event)
 
   # Backward compatibility alias
   CreateDraftRefund = CreateDraftReturn
-end
+end

rails_application/app/read_models/returns/remove_item_from_return.rb

@@ -16,4 +16,4 @@ def call(event)
 
   # Backward compatibility alias  
   RemoveItemFromRefund = RemoveItemFromReturn
-end
+end