message: Fixes malformatted error string in dtypes.cc
  Before
  >tf.DType(0)
  *** TypeError: %d does not correspond to a valid tensorflow::DataType
  After
  >tf.DType(0)
  *** TypeError: 0 does not correspond to a valid tensorflow::DataType
diff: @@ -68,7 +68,7 @@ PYBIND11_MODULE(_dtypes, m) {
  return static_cast<tensorflow::DataType>(id);
  }
  throw py::type_error(
  - py::str("%d does not correspond to a valid tensorflow::DataType")
  + py::str("{} does not correspond to a valid tensorflow::DataType")
  .format(id));
  }))
  // For compatibility with pure-Python DType.
  