Remove leading and trailing whitespace in Rust 1.55

In Rust 1.55, to remove leading and trailing whitespaces from a string, you can use the trim() method that is available on any string slice or string type. trim() method returns a new string slice with leading and trailing spaces removed.

Here is an example:

fn main() {
    let my_string = "   Rust programming language is awesome!   ";
    let trimmed_string = my_string.trim();
println!("Original string: {}", my_string);

    println!("Trimmed string:  {}", trimmed_string);

}

Output:

Original string:    Rust programming language is awesome!   

Trimmed string:  Rust programming language is awesome!

In this example, the trim() method is called on a string slice my_string that contains leading and trailing whitespaces. A new string slice trimmed_string is created by calling the trim() method on my_string, which removes the leading and trailing whitespaces. The original my_string remains unchanged.

Note that the trim() method only removes leading and trailing whitespaces. If there are other whitespace characters like tabs or newlines in the middle of the string, they will not be removed by the trim() method.