The current comment_style.py accepts the configuration options -t, --test and -f, --fast only. But the fast mode that gets passed from s_all is -F which is a capital F.

Error message:

dist/s_all run started...
dist/s_all running in fast mode...
Updating files that include the package version
usage: comment_style.py [-h] [-t] [-f]
comment_style.py: error: unrecognized arguments: -F

To fix the problem, adjust the comment_style.py configuration option to capital F.