__argp_fmtstream_printf (stream, req_fmt, _(real->arg));
__argp_fmtstream_printf (stream, req_fmt, gettext (real->arg));
arg (const struct argp_option *real, const char *req_fmt, const char *opt_fmt,     argp_fmtstream_t stream){  if (real->arg)    if (real->flags & OPTION_ARG_OPTIONAL)      __argp_fmtstream_printf (stream, opt_fmt, _(real->arg));    else      __argp_fmtstream_printf (stream, req_fmt, _(real->arg));}