Fixed typo in tox.ini
Fixed typo in tox.ini

rsalmaso/django-paypal,GamesDoneQuick/django-paypal,spookylukey/django-paypal,rsalmaso/django-paypal,spookylukey/django-paypal,rsalmaso/django-paypal,spookylukey/django-paypal,GamesDoneQuick/django-paypal