clippy::useless_format ignores format!("")

[klensy]

Lint name: clippy::useless_format

I tried this code:

pub fn foo()->String{
    format!("")
}

I expected to see this happen:
Warning from clippy about useless format! call, similar to:

warning: useless use of `format!`
 --> src/main.rs:6:5
  |
6 |     format!("")
  |     ^^^^^^^^^^^ help: consider using `.to_string()`: `"".to_string()`

Instead, this happened:
No warning.

Meta

Rust version (rustc -Vv):

rustc 1.57.0-nightly (54bb4fec6 2021-10-08)
binary: rustc
commit-hash: 54bb4fec68cb592e23077896baea072919721573
commit-date: 2021-10-08
host: x86_64-pc-windows-msvc
release: 1.57.0-nightly
LLVM version: 13.0.0

[Kixunil]

Maybe String::new() is even nicer?

[klensy]

Example shows how warning looks now, so it's simpler(?) to fix. Bonus points to String::new() :-)

[aDotInTheVoid]

@rustbot claim