message: Update arg_def_case_fuzz.cc
diff: @@ -28,12 +28,11 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
  tensorflow::StringPiece sp(char_data, size);
  - tensorflow::str_util::ArgDefCase(sp);
  - for (const auto &c : sp) {
  + std::string ns = tensorflow::str_util::ArgDefCase(sp);
  + for (const auto &c : ns) {
  const bool is_letter = 'a' <= c && c <= 'z';
  const bool is_digit = '0' <= c && c <= '9';
  if (!is_letter && !is_digit) {
  - printf("Got '%c'\n", c);
  assert(c == '_');
  }
  }
  