impl PartialOrd<str> for String

[tmandry]

    let a = "a".to_string();
    // compiles
    println!("{}", "b" > &a);
    // doesn't compile
    // println!("{}", &a < "b");

We have impl PartialEq<str> for String and impl PartialEq<&str> for String, but no matching impls for PartialOrd. Can we add these impls to round it out?

[ecton]

I ran into this today. From looking at this, Vec and slice need to have this implemented as well, and then String can use its implementation. OsStr/OsString and therefore Path/PathBuf already implement PartialOrd.

Would a pull request for these missing implementations be accepted or does some approval process need to happen before I submit a PR? I've never contributed to any of the official Rust projects.