spree/spree — pull request #1881 by iloveitaly (2012-08-24 20:48:26+00:00)
Title: Strip all non-numeric characters from credit card input

There is no instructions on the payment form indicating that the credit card number must be entered without any additional characters (e.g. hyphens).

From a UX POV I think it makes sense to eliminate all non-numeric characters from credit card input.