> When the new book is ready, we will either merge it into `src/doc/book` or remove the book from the main repository and use rust-lang/book as the new official

> When the new book is ready, we will either merge it into `src/doc/book` or remove the book from the main repository and use rust-lang/book as the new official source, it's not totally clear yet which. Also, no matter which of these two options we choose, we still plan to ship the book inside installations of Rust for offline reading, and host the book on docs.rust-lang.org.