bpo-44522: Fix inaccurate information in open() function (GH-27650)


- Use "Low surrogate code units" instead of "Unicode Private Use Area"
(cherry picked from commit b05e9b63fcfcd4bd7a6434fa9f9a7028d12f91c4)

Co-authored-by: meowmeowmeowcat <meowmeowcat1211@gmail.com>
1 file changed