Python: fix SyntaxWarning: invalid octal escape sequence

Take this code: path = "C: \477 _data" If we run this with Python 3.11+ in development mode (to enable deprecation warnings), we will see: $ python3.11 -X dev example.py /.../example.py:1: DeprecationWarning: invalid octal escape sequence '\477' path = "C:\477_data" On Python 3.12+, we instead get …