You're right; I kind of left that out since it's not (currently) possible to have a bare `str` anyway and there are more ways to work with one than just `&str`

You're right; I kind of left that out since it's not (currently) possible to have a bare `str` anyway and there are more ways to work with one than just `&str` (`Cow<str>`, `Box<str>`, `Rc<str>`, etc).