message: Fix bug in DataFeeder constructor
  This fix fixes
diff: @@ -323,7 +323,7 @@ class DataFeeder(object):
  self._x = dict([(k, check_array(v, v.dtype)) for k, v in list(x.items())
  ]) if x_is_dict else check_array(x, x.dtype)
  self._y = None if y is None else \
  - dict([(k, check_array(v, v.dtype)) for k, v in list(y.items())]) if x_is_dict else check_array(y, y.dtype)
  + dict([(k, check_array(v, v.dtype)) for k, v in list(y.items())]) if y_is_dict else check_array(y, y.dtype)
  # self.n_classes is not None means we're converting raw target indices to one-hot.
  if n_classes is not None:
  