• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  • To extend a type without breaking existing code
  • 20.2
  • type trait
• I have checked the latest main branch to see if this has already been fixed, in this file:
  • /src/ch20-02-advanced-traits.md

URL to the section(s) of the book with this problem: https://doc.rust-lang.org/book/ch20-02-advanced-traits.html#listing-20-16

Description of the problem:
I think there's a mistake in this part:

You’ll use default type parameters in two main ways:

1. To extend a type without breaking existing code
2. To allow customization in specific cases most users won’t need

1 should be: "To extend a trait without breaking existing code"

P.S. I have come across a few other errors that have already been fixed in the main branch, which is great of course, but when will the online book be updated to match?

And of course, it goes without saying, thank you to everyone who wrote the book. It's fantastic.