message: Change warning message for case where Python detects a colocation that conflicts with a device assignment.
diff: @@ -3361,9 +3361,9 @@ class Graph(object):
  if (op.device and pydev.canonical_name(op.device) !=
  pydev.canonical_name(colocation_op.device)):
  logging.warning("Tried to colocate %s with an op %s that had "
  - "a different device: %s vs %s. "
  - "Ignoring colocation property.", op.name,
  - colocation_op.name, op.device,
  + "a different device: %s vs %s. Postponing "
  + "error-checking until all devices are assigned.",
  + op.name, colocation_op.name, op.device,
  colocation_op.device)
  else:
  op._set_device(colocation_op.device) # pylint: disable=protected-access
  