Rust 文字列から後ろにある空白のみを取り除く

"文字列".trim_end();

fn main() {

    let str: String = "  abcde  ".to_string();

    println!( "{}", str.trim_end() );

    assert_eq!("abcde", str.trim_end() );

}

fn main() {

    let str: String = "　　abcde　　".to_string();

    println!( "{}", str.trim_end() );

    assert_eq!("　　abcde", str.trim_end() );

}