spree/spree — comment on commit 98821c48d173b5228338ff9c37ed0bec73e77006
File:  line 0
By vandrijevik:

This won’t work because `to_s` on “Flat Percent” gives the same result as `name`. A calculator under a namespace (such as the UPS/FedEx/USPS calculators) will trigger the error.