When I view the help I still see "Usage: pep8 [options] input ...".
Wouldn't pep8 be something that is no longer referenced, and pycodestyle shown instead?
$ pycodestyle --help
Usage: pep8 [options] input ...
Options:
--version show program's version number and exit
-h, --help show this help message and exit
[...]
$ pycodestyle --version
2.0.0