keystone: fix pep8 error in test
keystone: fix pep8 error in test

Signed-off-by: Julien Danjou <5c682c2d1ec4073e277f9ba9f4bdf07e5794dabe@danjou.info>

jd/pifpaf,sileht/pifpaf,sileht/pifpaf,jd/pifpaf,sileht/pifpaf