--- OptionParser::List#append(switch, short_opts, long_opts, nolong_opts)
    Appends switch at tail of the list, and associates short,
    long and negated long options.
    :Parameters:
      : switch
        OptionParser::Switch instance to be inserted.
      : short_opts
        list of short style options.
      : long_opts
        list of long style options.
      : nolong_opts
        list of long style options with "no-" prefix.

