redundant_closure: suggest smaller item path

[matthiaskrgr]

use std::collections::HashMap;
fn main() {
    let mut map: HashMap<&str, Vec<i32>> = HashMap::new();

    map.entry("bar").or_insert_with(|| vec![]);
}

This will cause clippy to lint:

warning: redundant closure found
 --> src/main.rs:5:37
  |
5 |     map.entry("bar").or_insert_with(|| vec![]);
  |                                     ^^^^^^^^^ help: remove closure as shown: `$crate::vec::Vec::new`
  |
  = note: `#[warn(clippy::redundant_closure)]` on by default
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure

warning: 1 warning emitted

When using vec![], clippy will suggest $crate::vec::Vec::new which seems a bit complex given that we could just suggest Vec::new (without the path)?

[camsteffen]

Related: rust-lang/rust#73996

[giraffate]

Oh, the suggestion seems to be gone now. Clippy version: 0.1.51 (2021-01-23 4d0dd02).
https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=4e98e3c83333070d71025d5150311b66

warning: redundant closure found
 --> src/main.rs:5:37
  |
5 |     map.entry("bar").or_insert_with(|| vec![]);
  |                                     ^^^^^^^^^
  |
  = note: `#[warn(clippy::redundant_closure)]` on by default
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_closure

warning: 1 warning emitted

    Finished dev [unoptimized + debuginfo] target(s) in 0.47s