message: Fix some typos in the doc for XlaDynamicSlice
  phawkins@ suggested these in cr/212715067 but I accidentally made the changes in
  another client.
diff: @@ -121,8 +121,8 @@ Wraps the XLA DynamicSlice operator, documented at
  DynamicSlice extracts a sub-array from the input array at dynamic
  start_indices. The size of the slice in each dimension is passed in
  size_indices, which specify the end point of exclusive slice intervals in each
  -dimension -- [start, start + size). The shape of start_indices must be rank ==
  -1, with dimension size equal to the rank of operand.
  +dimension -- [start, start + size). The shape of start_indices must have rank 1,
  +with dimension size equal to the rank of operand.
  input: A `Tensor` of type T.
  @@ -131,7 +131,8 @@ start_indices: Rank 1 tensor of N integers containing the starting indices of
  start_indices: List of N integers containing the slice size for each
  dimension. Each value must be strictly greater than zero, and start + size
  - must be less
  + must be less than or equal to the size of the dimension to avoid
  + implementation defined behavior.
  )doc");
  REGISTER_OP("XlaDynamicUpdateSlice")
  