gocardless/gocardless-python — pull request #11 by pegler (2013-01-23 17:33:14+00:00)
Title: python 2.6 compatibility tweaks

See http://docs.python.org/2/library/string.html#format-string-syntax

> Changed in version 2.7: The positional argument specifiers can be omitted, so '{} {}' is equivalent to '{0} {1}'.