In Listing 13.1 and 13.3, when the primary constructor is made each parameter is comma separated.
Then in Listing 13.4, 13.6, 13.7, 13.8, 13.9, 13.10, 13.11, and 13.12 the commas after the second and third parameter are missing.
Thank you, jpaone. This is something that we’ve noticed in our classes, and it’s good to note it in the errata here.