rem: error (0, 0, _("too few arguments")); usage (EXIT_FAILURE);
add: error (0, 0, _("missing operand")); usage (EXPR_INVALID);
context: main (int argc, char **argv){  VALUE *v;  program_name = argv[0];  setlocale (LC_ALL, "");  bindtextdomain (PACKAGE, LOCALEDIR);  textdomain (PACKAGE);  atexit (close_stdout);  parse_long_options (argc, argv, PROGRAM_NAME, GNU_PACKAGE, VERSION,		      AUTHORS, usage);  /* The above handles --help and --version.     Since there is no other invocation of getopt, handle `--' here.  */  if (argc > 1 && STREQ (argv[1], "--"))    {      --argc;      ++argv;    }  if (argc == 1)    {      error (0, 0, _("too few arguments"));      usage (EXIT_FAILURE);    }  args = argv + 1;  v = eval ();  if (!nomoreargs ())    error (2, 0, _("syntax error"));  printv (v);  exit (null (v));}