Invalid code generated when using "Remove all the unused imports"

[benwh1]

rust-analyzer version: 0.4.1778

rustc version: rustc 1.76.0-nightly (3f28fe133 2023-12-18)

Using "Remove all the unused imports" on this code:

mod m {
    pub mod x {
        pub struct A;
        pub struct B;
    }
    pub mod y {
        pub struct C;
    }
}

use m::{
    x::{A, B},
    y::C,
};

fn main() {
    B;
}

turns the import into

use m::
    x::B,
;

I think there must have been some recent change where braces around single imports are now automatically removed because I don't remember this happening before, and it isn't broken on the stable release.

[lnicola]

This must be #16066, CC @Young-Flash

[Young-Flash]

we should take care about the tailing ,

@rustbot claim