Closes #3485 (possibly - testing todo)

• https://peps.python.org/pep-0519/ "Adding a file system path protocol" (Python-Version: 3.6)
  " If a str is desired and the encoding of bytes should be assumed to be the default file system encoding, then os.fsdecode() should be used."

• https://peps.python.org/pep-0529/ "Change Windows filesystem encoding to UTF-8" (Python-Version: 3.6)
  "On Windows bytes cannot round-trip all characters used in paths, as Python internally uses the *A functions and hence the encoding is “whatever the active code page is”. Since the active code page cannot represent all Unicode characters, the conversion of a path into bytes can lose information without warning or any available indication."

• https://docs.python.org/3/library/sys.html#sys.getfilesystemencoding
  "os.fsencode() and os.fsdecode() should be used to ensure that the correct encoding and errors mode are used."