rustfmt-nightly 1.4.21

Tool to find and fix Rust formatting issues
// rustfmt-edition: 2018

fn main() {
    let x = async { Ok(()) };
}

fn baz() {
    // test
    let x = async {
        // async blocks are great
        Ok(())
    };

    let y = async { Ok(()) }; // comment

    spawn(a, async move {
        action();
        Ok(())
    });

    spawn(a, async move || {
        action();
        Ok(())
    });
}