Missing parenthesis in help message

[gabi-250]

Code

struct Foo;

struct Bar;

impl From<&Foo> for Bar {
    fn from(foo: &Foo) -> Bar {
        Bar
    }
}

fn main() {
    let foo = Foo;
    let b: Bar = foo.into();
}

Current output

error[E0277]: the trait bound `Foo: Into<_>` is not satisfied
  --> src/main.rs:13:22
   |
13 |     let b: Bar = foo.into();
   |                      ^^^^ the trait `~const Into<_>` is not implemented for `Foo`
   |
   = note: required for `Foo` to implement `Into<Bar>`
help: consider borrowing here
   |
13 |     let b: Bar = &foo.into();
   |                  +

For more information about this error, try `rustc --explain E0277`.
error: could not compile `reference-loop` due to previous error

Desired output

error[E0277]: the trait bound `Foo: Into<_>` is not satisfied
  --> src/main.rs:13:22
   |
13 |     let b: Bar = foo.into();
   |                      ^^^^ the trait `~const Into<_>` is not implemented for `Foo`
   |
   = note: required for `Foo` to implement `Into<Bar>`
help: consider borrowing here
   |
13 |     let b: Bar = (&foo).into();
   |                   +

For more information about this error, try `rustc --explain E0277`.
error: could not compile `reference-loop` due to previous error

Rationale and extra context

No response

Other cases

No response

Anything else?

The help message suggests borrowing foo.into(), which obviously doesn't fix the issue (it leads to a series of other misleading errors). This happens using rustc 1.68.0 (2c8cc3432 2023-03-06).

[mu001999]

@rustbot claim