rb_enc_isprint    388 re.c           	    else if (c != '/' && rb_enc_isprint(c, enc)) {
rb_enc_isprint    436 re.c           	    else if (rb_enc_isprint(c, enc)) {
rb_enc_isprint    534 sprintf.c      	    if (rb_enc_isprint(*p, enc))
rb_enc_isprint   5543 string.c       	if ((enc == resenc && rb_enc_isprint(c, enc)) ||
rb_enc_isprint   9264 string.c       	if (!rb_enc_isprint(c, enc)) return FALSE;