Fix typo in tutorial-two-python. Bytes instead string
Fix typo in tutorial-two-python. Bytes instead string

This commit fix typo in python-two tutorial descriptions.
Replace string and add bytes to time.sleep body in Message
acknowledgment part.

rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website