code: def create_main_synopsis(self, parser):
          
          self.add_usage(parser.usage, parser._actions,
                         parser._mutually_exclusive_groups, prefix='')
          usage = self._format_usage(None, parser._actions,
                                     parser._mutually_exclusive_groups, '')
  
          usage = usage.replace('%s ' % self._prog, '')
          usage = '.SH SYNOPSIS\n \\fB%s\\fR %s\n' % (self._markup(self._prog),
                                                      usage)
          return usage
docs: create synopsis from main parser