message: Revise the variable name
diff: @@ -35,7 +35,7 @@ namespace data {
  /* static */ constexpr const char* const CacheDatasetOp::kOutputTypes;
  /* static */ constexpr const char* const CacheDatasetOp::kOutputShapes;
  -constexpr char kTensorStrFormat[] = "%%%zuzu_%%%zuzu";
  +constexpr char kKeyStrFormat[] = "%%%zuzu_%%%zuzu";
  constexpr char kPaddingSizeStrFormat[] = "%zu";
  constexpr char kFileDatasetPrefix[] = "File";
  constexpr char kMode[] = "Mode";
  @@ -66,7 +66,7 @@ class CacheDatasetOp::FileDataset : public DatasetBase {
  num_tensors_(input->output_dtypes().size()),
  tensor_index_padding_size_(StringPaddingSize(num_tensors_)),
  item_index_padding_size_(StringPaddingSize(kMaxItems)),
  - tensor_format_string_(strings::Printf(kTensorStrFormat,
  + tensor_format_string_(strings::Printf(kKeyStrFormat,
  item_index_padding_size_,
  tensor_index_padding_size_)) {
  input_->Ref();
  