[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

src/lightning/fabric/strategies/ddp.py

@@ -245,6 +245,7 @@ def _create_stream_context(self, device_ids=None):
             ctx = self.torch_lib.stream(stream)
         else:
             from contextlib import nullcontext
+
             ctx = nullcontext()
         return ctx
 

src/lightning/pytorch/strategies/ddp.py

@@ -434,6 +434,7 @@ def _create_stream_context(self, device_ids=None):
             ctx = self.torch_lib.stream(stream)
         else:
             from contextlib import nullcontext
+
             ctx = nullcontext()
         return ctx