Remove extra whitespace from string

---

• The second solution is obviously the better solution, but the first one might be applied to situations where we would like to get rid of other duplicate characters.

examples/strings/remove-extra-white-spaces/src/main.rs

fn main() {
    let text = "   Some      white \n  \n    \n spaces   \ntext \t \n with tabs   \n";
    println!("'{}'", text);

    let short = text
        .replace(['\n', '\t'], " ")
        .trim()
        .split(' ')
        .filter(|short| !short.is_empty())
        .collect::<Vec<_>>()
        .join(" ");
    println!("'{}'", short);

    let other = text.split_whitespace().collect::<Vec<_>>().join(" ");
    println!("'{}'", other);
}

'   Some      white 
  
    
 spaces   
text 	 
 with tabs   
'
'Some white spaces text with tabs'
'Some white spaces text with tabs'