Difference between os.path.isdir and Path.is_dir

[Kirill Balunov]

 Hi all! It is expected that:
```
>>> import os
>>> from pathlib import Path
>>> dummy = " "   # or "" or "     "
>>> os.path.isdir(dummy)
False
>>> Path(dummy).is_dir()
True
```

or was it overlooked?

with kind regards,
-gdg