In the PDF version of the book, the footnote in the text not clickable, so it is easy to miss the URL.
The given URL is also outdated. The PDF states
The real URL is
But in my opinion, you could just directly link to the code:
Alternatively, you could just set a proper redirect to support the old URL, of course.
@timpritlove Thanks for the heads up. I’ve forwarded your notes to our Support team to address the issue.