exchange argument to queue_bind can be empty in 0-9 (default exchange)
exchange argument to queue_bind can be empty in 0-9 (default exchange)

dallasmarlow/py-amqp,dims/py-amqp,smurfix/aio-py-amqp,dallasmarlow/py-amqp,jonahbull/py-amqp,yetone/py-amqp,jonahbull/py-amqp,dims/py-amqp,smurfix/aio-py-amqp,yetone/py-amqp