message: Add some documentation to error about being unable to place graph in the tf.function case
diff: @@ -1277,7 +1277,10 @@ Status ColocationGraph::InitializeMemberWithAssignedDevice(
  "to run a tf.function with resource inputs residing on remote devices. "
  "This use case is currently not supported. Here are the devices "
  "available on this machine: [",
  - absl::StrJoin(DevicesToString(device_set_.devices()), ", "), "]");
  + absl::StrJoin(DevicesToString(device_set_.devices()), ", "), "].",
  + "If you are seeing this error when running using a tf.Session, set "
  + "experimental.share_cluster_devices_in_session to true in the "
  + "tf.ConfigProto.");
  }
  for (const auto& d : member->supported_device_types()) {
  