[CodeStyle] remove tabs in cpp files (#46236)

* [CodeStyle] remove tabs in cpp files

* update comment format

paddle/fluid/operators/pixel_shuffle_op.cc

@@ -63,7 +63,6 @@ class PixelShuffleOpMaker : public framework::OpProtoAndCheckerMaker {
     `Real-Time Single Image and Video Super-Resolution Using an Efficient
     Sub-Pixel Convolutional Neural Network <https://arxiv.org/abs/1609.05158v2>`_
     by Shi et. al (2016) for more details.
-
     )DOC");
   }
 };

paddle/fluid/operators/pixel_unshuffle_op.cc

@@ -58,7 +58,6 @@ class PixelUnshuffleOpMaker : public framework::OpProtoAndCheckerMaker {
     `Real-Time Single Image and Video Super-Resolution Using an Efficient
     Sub-Pixel Convolutional Neural Network <https://arxiv.org/abs/1609.05158v2>`_
     by Shi et. al (2016) for more details.
-
     )DOC");
   }
 };