message: Polish the comments in metadata_schema.fbs
diff: @@ -489,13 +489,20 @@ table SubGraphMetadata {
  // A description explains details about what the subgraph does.
  description:string;
  - // Metadata of all input tensors used in this subgraph.
  + // Metadata of all input tensors used in this subgraph. It matches extactly
  + // the input tensors specified by `SubGraph.inputs` in the TFLite
  + // schema.fbs file[2]. The number of `TensorMetadata` in the array should
  + // equal to the number of indices in `SubGraph.inputs`.
  //
  + // [2]: tensorflow/lite/schema/schema.fbs
  // <Codegen usage>:
  // Determines how to process the inputs.
  input_tensor_metadata:[TensorMetadata];
  - // Metadata of all output tensors used in this subgraph.
  + // Metadata of all output tensors used in this subgraph. It matches extactly
  + // the output tensors specified by `SubGraph.outputs` in the TFLite
  + // schema.fbs file[2]. The number of `TensorMetadata` in the array should
  + // equal to the number of indices in `SubGraph.outputs`.
  //
  // <Codegen usage>:
  // Determines how to process the outputs.
  