restore test file format

Author: mikethegoblin

test/collective/test_collective_gather_api.py

@@ -48,6 +48,5 @@ def test_gather_nccl_dygraph(self):
             )
 
 
-
 if __name__ == "__main__":
     unittest.main()

test/collective/test_collective_isend_irecv_api.py

@@ -44,6 +44,5 @@ def test_isend_irecv_nccl_dygraph(self):
             )
 
 
-
 if __name__ == "__main__":
     unittest.main()

test/collective/test_collective_reduce_scatter_api.py

@@ -62,6 +62,5 @@ def test_reduce_scatter_nccl_dygraph(self):
             )
 
 
-
 if __name__ == "__main__":
     unittest.main()