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

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

pytorch_lightning/trainer/connectors/data_connector.py

@@ -134,7 +134,7 @@ def attach_dataloaders(
     def attach_datamodule(
         self, model: "pl.LightningModule", datamodule: Optional["pl.LightningDataModule"] = None
     ) -> None:
-        datamodule = datamodule or getattr(model, 'datamodule', None)
+        datamodule = datamodule or getattr(model, "datamodule", None)
 
         # If we have a datamodule, attach necessary hooks + dataloaders
         if datamodule is None: