Shopify/active_merchant — pull request #410 by csaunders (2012-07-16 21:16:19+00:00)
Title: Ensure that partial payment captures can be completed through PlugnPay

Essentially, we'll try to make a reauth (partial capture) request, and if that fails
it's most likely because the reauth amount was the full amount. In that case
we try to do a request with mark (full capture) instead.

Please review @jduff @Soleone