message: Line-too-long fix
diff: @@ -1629,7 +1629,8 @@ def assert_shapes(shapes, data=None, summarize=None,
  else:
  name = x.name
  raise ValueError(
  - '%s. Tensor %s. Symbol `...` for a variable number of unspecified '
  + '%s. '
  + 'Tensor %s. Symbol `...` for a variable number of unspecified '
  'dimensions is only allowed as the first entry' % (message, name))
  # Shape specified as None implies no constraint
  