Missing parentheses around trait object in rustdoc

[dtolnay]

pub fn f(_: &(ToString + 'static)) {}

This function is documented as:

The parentheses are missing and the function would not compile without them:

error[E0178]: expected a path on the left-hand side of `+`, not `&ToString`
 --> src/main.rs:1:13
  |
1 | pub fn f(_: &ToString + 'static) {}
  |             ^^^^^^^^^^^^^^^^^^^ help: try adding parentheses: `&(ToString + 'static)`

[GuillaumeGomez]

Well found! Taking a look.