cc: @bagel897 FYI, this is an issue raised by rstcruzo in #685. I hope I didn't missing anything obvious with this fix here.

Shouldn't it be **.py? That way it'll glob root directory files.

Yeah, that's what I initially thought as well, but apparently, the glob.glob() and the pathlib glob doesn't really work the same.

Doing **.py is an error with pathlib's glob:

In [5]: list(Path(".").glob("**.py"))
ValueError: Invalid pattern: '**' can only be an entire path component

**/*.py looks unintuitive, but it does actually include the root directory files:

In [12]: list(Path(".").glob("**/*.py"))
Out[12]: 
[PosixPath('setup.py'),
...
]

OTOH, for glob.glob() stdlib module, **.py is basically identical to *.py:

In [10]: glob.glob("**.py", recursive=True)
Out[10]: ['setup.py']

and **/*.py works the same as pathlib's glob.

Weird