Should Bytes.toString really use getString?

I know it has been like this for a while, but having an implicit conversion like this seems wrong to me. In the general case, the conversion does not lead to printable strings and printing is what `toString` is typically used for. There could be 0-chars in the middle which in the standard `getString` implementation truncate the string.

IMO the user should be explicit about such a conversion. A `toString` could act more like `toHex` instead.