@classmethod<EOL><INDENT>def add_options(cls, parser):<DEDENT>
parser.add_option('<STR_LIT>', action='<STR_LIT:store_true>', help='<STR_LIT>')<EOL>parser.config_options.append('<STR_LIT>')<EOL>
Add options to flake8.

        :param parser: optparse.OptionParser from pycodestyle.