Output Showing in different lines. On taking user input

Question

I am taking a user input and then concatenating that user input with a String. But output is showing in two different lines. Any method to be placed so that "\n" gets removed and the both prints on the same line. I have tried .trim() but it's not working.

fn main () {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).expect("_");
    s.trim();
    s.push_str(",World");
    println!("{}",s);
}

Output I am getting.

hello      
hello
,World

Output I want.

hello      
hello,World

Solved:

fn main () {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).expect("_");
    s.pop();
    s.push_str(",World");
    println!("{}",s);
}