Function basic_escape 

pub fn basic_escape(unescaped_str: &str) -> RUMString

Escape UTF-8 characters in UTF-8 string that are beyond ascii range

Example

 use rumtk_core::strings::basic_escape;
 let message = "I ❤ my wife!";
 let escaped_message = basic_escape(&message);
 assert_eq!("I \\u{2764} my wife!", &escaped_message, "Did not get expected escaped string! Got {}!", &escaped_message);