message: Add Raises in the docstring of tf.histogram_fixed_width_bins
  This fix adds exception conditions for tf.histogram_fixed_width_bins in the docstring.
  This fix fixes 29279.
diff: @@ -55,6 +55,11 @@ def histogram_fixed_width_bins(values,
  A `Tensor` holding the indices of the binned values whose shape matches
  `values`.
  + Raises:
  + TypeError: If any unsupported dtype is provided.
  + tf.errors.InvalidArgumentError: If value_range does not
  + satisfy value_range[0] < value_range[1].
  +
  Examples:
  ```python
  