optopt           2771 src/prt2pdf/prt2pdf.c         if (isprint (optopt))
optopt           2772 src/prt2pdf/prt2pdf.c           (void)fprintf (stderr, "ERROR: Illegal usage of option '-%c'", optopt);
optopt           2774 src/prt2pdf/prt2pdf.c           (void)fprintf (stderr, "ERROR: Unknown option character '\\x%x'", optopt);