rustc suggests unstable library method on stable

[rillian]

Code

fn main() {
    let v = vec![1,2,3,4];
    for pair in v.chunk(2) {
        println!("{}, {}", pair[0], pair[1]);
    }
}

Current output

error[E0599]: no method named `chunk` found for struct `Vec<{integer}>` in the current scope
 --> src/main.rs:3:19
  |
3 |     for pair in v.chunk(2) {
  |                   ^^^^^ help: there is a method with a similar name: `as_chunks`

For more information about this error, try `rustc --explain E0599`.

Desired output

error[E0599]: no method named `chunk` found for struct `Vec<{integer}>` in the current scope
 --> src/main.rs:3:19
  |
3 |     for pair in v.chunk(2) {
  |                   ^^^^^ help: there is a method with a similar name: `chunks`

For more information about this error, try `rustc --explain E0599`.

Rationale and extra context

It would be more helpful to suggest the chunks method for the typo rather than a nightly-only symbol which isn't actually available.

1. Following the suggestion doesn't work.
2. The chunks() method is actually available on a std::slice.
3. The chunks() method has been stable since 1.0.0.
4. I had trouble noticing the difference between .chunk() and .chuncks() and could have used the compiler's help.

Other cases

No response

Anything else?

Reproduced with 1.68.0 stable and 1.70 nightly.

[rillian]

cc @estebank

[Ezrashaw]

@rustbot claim