Fix help subtoken parser.

tokenline.c

@@ -491,7 +491,7 @@ static void process_line(t_tokenline *tl)
  break;
  if (!strcmp(tl->buf + words[0], "help")) {
  /* Tokenize with errors turned off. */
- tokenize(tl, words, num_words, &tokens, NULL);
+ tokenize(tl, words + 1, num_words - 1, &tokens, NULL);
  if (tl->parsed.last_token_entry) {
  show_help(tl, words, num_words);
  }