Hi, all.

I found .pth file is decoded by the default (i.e. locale-specific) encoding.
https://github.com/python/cpython/blob/0269ce87c9347542c54a653dd78b9f60bb9fa822/Lib/site.py#L173

pth files contain:

* import statements
* paths

For import statement, UTF-8 is the default Python code encoding.
For paths, fsencoding is the right encoding. It is UTF-8 on Windows
(excpet PYTHONLEGACYWINDOWSFSENCODING is set), and locale-specific
encoding in Linux.

What encoding should we use?

* UTF-8
* sys.getfilesystemencoding()
* Keep status-quo.