cli.py: fix PEP 8 errors, as reported by `flake8`
cli.py: fix PEP 8 errors, as reported by `flake8`

Signed-off-by: Philippe Proulx <2096628897b40c93960fdd9e24c9c883a54d4fe9@gmail.com>

efficios/barectf,efficios/barectf