Merge pull request #1050 from mrshenli/fix

Fix code block in pipeline tutorial

Author: Jessica Lin

intermediate_source/dist_pipeline_parallel_tutorial.rst

@@ -58,6 +58,7 @@ the two ResNet shards.
 
 
 .. code:: python
+
     import threading
 
     import torch
@@ -367,4 +368,4 @@ in each batch.
     Processing batch 0
     Processing batch 1
     Processing batch 2
-    number of splits = 8, execution time = 9.076049566268921
+    number of splits = 8, execution time = 9.076049566268921