Shopify/active_shipping — pull request #173 by BlakeMesdag (2014-07-29 21:56:03+00:00)
Title: Use deep_dup on items in ShipmentPacker

My previous PR missed duplicating the objects inside the array, so they held references to their originals and modified their quantities. This does a `deep_dup` to prevent the issue of modifying those instances.

@camilo

/cc @csfrancis