Parse app path values for option.

def parse_option(self, option, block_name, *values):
        """ Parse app path values for option.
            """

        # treat arguments as part of the program name (support spaces in name)
        values = [x.replace(' ', '\\ ') if not x.startswith(os.sep) else x
                  for x in [str(v) for v in values]]

        if option == 'close':
            option = 'start_' + option

        key = option.split('_', 1)[0]
        self.paths[key] = set(common.extract_app_paths(values))