Oh, I just realized that you can click on each example to download the code 
. Did I miss this feature because I’ve been using the book without internet access? Or is there an explanation for this in the book that I might have overlooked?
Anyway, downloading the examples does help solve this problem, as I will go back to the code on my notebook eventually.
Initially, I was looking for the files in the repository itself and was surprised not to find those examples there. It was a bit frustrating not to find those files directly. Now, with the link, I understand why they are not included. 
But isn’t the book repository the best place for those code examples?