A tool that beautify multiple lines.
§Basic example
let doc = " \t\n hello\n world!";
assert_eq!(pure_lines::pure(doc),String::from("hello\nworld!"));
§Example with prefix
let doc = " \t\n hello\n world!";
assert_eq!(pure_lines::pure_with(doc,"> "),String::from("> hello\n> world!"));