message: Gradient doc changed
diff: @@ -58,7 +58,7 @@ def gradients(ys,
  `gradients()` adds ops to the graph to output the derivatives of `ys` with
  respect to `xs`. It returns a list of `Tensor` of length `len(xs)` where
  - each tensor is the `sum(dy/dx)` for y in `ys`.
  + each tensor is the `sum(dy/dx)` for y in `ys` and for x in `xs`.
  `grad_ys` is a list of tensors of the same length as `ys` that holds
  the initial gradients for each y in `ys`. When `grad_ys` is None,
  @@ -138,7 +138,8 @@ def gradients(ys,
  `none`.
  Returns:
  - A list of `sum(dy/dx)` for each x in `xs`.
  + A list of `Tensor` of length `len(xs)` where each tensor is the `sum(dy/dx)`
  + for y in `ys` and for x in `xs`.
  Raises:
  LookupError: if one of the operations between `x` and `y` does not
  