message: Update `tf.contrib.data` API docstring.
diff: # See the License for the specific language governing permissions and
  # limitations under the License.
  # ==============================================================================
  -"""`tf.contrib.data` API for input pipelines.
  +"""Experimental API for building input pipelines.
  -This module contains the experimental (less stable) counterpart to the
  -`tf.data` API. See @{tf.data.Dataset} and @{tf.data.Iterator} for the
  -stable classes.
  +This module contains experimental `Dataset` sources and transformations that can
  +be used in conjunction with the @{tf.data.Dataset} API. Note that the
  +`tf.contrib.data` API is not subject to the same backwards compatibility
  +guarantees as `tf.data`, but we will provide deprecation advice in advance of
  +removing existing functionality.
  See the @{$datasets$Importing Data} Programmer's Guide for an overview.
  -@@Dataset
  @@Counter
  @@batch_and_drop_remainder
  