Merge remote-tracking branch 'origin/bugfix/ddp-barrier' into bugfix/ddp-barrier

Author: awaelchli

tests/plugins/test_ddp_plugin.py

@@ -62,7 +62,7 @@ def on_train_start(self):
 
 @RunIf(min_gpus=4, special=True)
 def test_ddp_barrier_non_consecutive_device_ids(tmpdir):
-    
+
     model = BoringModel()
     trainer = Trainer(
         default_root_dir=tmpdir,