Method show

tools/duplicates/duplicates.cpp:98–103

NOT USED

#if 0
  // NOT USED
  void show(FILE *fp = stderr) const {
    fputs("tokens:", fp);
    for (auto k : token_seq)
      fprintf(fp, " %s", tokid2string[k].c_str());
    fputc('\n', fp);
  }
#endif
};