Unshadow 'test_to_string'.
Unshadow 'test_to_string'.

squirro/python-oauth2,joestump/python-oauth2,simplegeo/python-oauth2,jackiekazil/python-oauth2,arthurian/python-oauth2,edworboys/python-oauth2,CestusMagnus/python-oauth2,CentricWebEstate/python-oauth2