message: Replace "=>" with "into" for readability.
diff: @@ -515,7 +515,7 @@ class MklLayoutRewritePass : public GraphOptimizationPass {
  //
  // Add rules to fuse sequences such as "Transpose (NCHW -> NHWC) + Conv2D
  // (NHWC) + Transpose (NHWC->
  - // NCHW) " => "Conv2D (NCHW). Such patterns occur frequently in Keras.
  + // NCHW)" into "Conv2D (NCHW)". Such patterns occur frequently in Keras.
  // Note: we use the term "merge" is to combine (exactly) 2 nodes into one,
  // while "fusion" is
  // for 3+ nodes situation.
  