Two features are described as Rust's "most unique/distinctive feature"

[jruderman]

• I have checked the latest main branch to see if this has already been fixed
• I have searched existing issues and pull requests for duplicates

URL to the section(s) of the book with this problem:

https://doc.rust-lang.org/book/ch04-00-understanding-ownership.html:

"Ownership is Rust’s most unique feature, and it enables Rust to make memory safety guarantees without needing a garbage collector."

https://doc.rust-lang.org/book/ch10-03-lifetime-syntax.html:

"The concept of lifetimes is somewhat different from tools in other programming languages, arguably making lifetimes Rust’s most distinctive feature."

Description of the problem:

I don't think it's possible for one feature to be the "Rust's most unique feature" while another is "Rust's most distinctive feature".

(The word "unique" is being used with the same meaning as "distinctive"; see #2314)

Suggested fix:

Drop one of the superlatives, perhaps while noting how the features are connected.