TensorFlow Setup Issue

I just setup TensorFlow on my MacBook Pro (El Capitan) and ran the installation test suggested on the website. This is what shows up:

hello = tf.constant('Hello, TensorFlow!')

sess = tf.Session()

print(sess.run(hello))

b'Hello, TensorFlow!'

Are the "b" and quotations around Hello, TensorFlow a result of something wrong done during installation?

Thanks!