Determines whether a given text-based value is printable
use is_printable::IsPrintable;
let hello = "hello";
let is_printable = hello.is_printable();
assert_eq!(is_printable, true);
use is_printable::IsPrintable;
let bell = '\u{7}'
let is_printable = bell.is_printable();
assert_eq!(is_printable, false);