Fix indent for convert_iter_for_each_to_for

[A4-Tacks]

Example

fn main() {
    {
        let it = core::iter::repeat(92);
        it.$0for_each(|param| match param {
            (x, y) => println!("x: {}, y: {}", x, y),
        });
    }
}

Before this PR:

fn main() {
    {
        let it = core::iter::repeat(92);
        for param in it {
            match param {
                    (x, y) => println!("x: {}, y: {}", x, y),
                }
        }
    }
}

After this PR:

fn main() {
    {
        let it = core::iter::repeat(92);
        for param in it {
            match param {
                (x, y) => println!("x: {}, y: {}", x, y),
            }
        }
    }
}