message: shorten to less than 80 characters
diff: @@ -169,7 +169,7 @@ def _enclosing_tpu_context():
  @tf_export('einsum', 'linalg.einsum')
  def einsum(equation, *inputs, **kwargs):
  - """Contraction over specified indices and outer product for an arbitrary number of tensors.
  + """Tensor contraction over specified indices and outer product.
  This function returns a tensor whose elements are defined by `equation`,
  which is written in a shorthand form inspired by the Einstein summation
  