message: Minor bug fix in PrefetchDataset state saving/restoring.
diff: @@ -164,7 +164,7 @@ class PrefetchDatasetOp : public UnaryDatasetOpKernel {
  buffer_element.value.size()));
  for (size_t j = 0; j < buffer_element.value.size(); j++) {
  TF_RETURN_IF_ERROR(writer->WriteTensor(
  - strings::StrCat("buffer[", i, "][", j, "]"),
  + full_name(strings::StrCat("buffer[", i, "][", j, "]")),
  buffer_element.value[j]));
  }
  }
  @@ -201,7 +201,7 @@ class PrefetchDatasetOp : public UnaryDatasetOpKernel {
  for (size_t j = 0; j < value_size; j++) {
  buffer_element.value.emplace_back();
  TF_RETURN_IF_ERROR(reader->ReadTensor(
  - strings::StrCat("buffer[", i, "][", j, "]"),
  + full_name(strings::StrCat("buffer[", i, "][", j, "]")),
  &buffer_element.value.back()));
  }
  }
  