message: add missing '>' in
  add missing '>' in
  (tensor<2x3xf64)->(tensor<2x3xf64>)
  Closes
  COPYBARA_INTEGRATE_REVIEW=https://github.com/tensorflow/mlir/pull/283 from JKIsaacLee:patch-1
diff: @@ -72,7 +72,7 @@ Let's break down the anatomy of this MLIR operation:
  are always constant. Here we define a boolean attribute named 'inplace'
  that has a constant value of true.
  -- `(tensor<2x3xf64) -> tensor<3x2xf64>`
  +- `(tensor<2x3xf64>) -> tensor<3x2xf64>`
  * This refers to the type of the operation in a functional form, spelling
  the types of the arguments in parentheses and the type of the return
  