* Replace the use of the function string.replace() with the method str.replace()
because that's what works for both Python 2 and 3.
* Cleanup the unused string import.
Added a changelog fragment.
* The documentation for os.write() seems a bit iffy, but in Python 3 we
definitely cannot pass it a string and we need to encode it into
bytes.
The Python documentation at
https://docs.python.org/3/howto/pyporting.html#text-versus-binary-data
says that this code will work in Python 2 as well.
Co-authored-by: Lloyd Parkes <lloyd@must-have-coffee.gen.nz>
