Apply suggestions from code review

Co-authored-by: Adrian Wälchli <[email protected]>

pytorch_lightning/callbacks/base.py

@@ -104,6 +104,7 @@ def on_train_epoch_end(
         """Called when the train epoch ends.
 
         To access all batch outputs at the end of the epoch, either:
+
         1. Implement `training_epoch_end` in the `LightningModule` and access outputs via the module OR
         2. Cache data across train batch hooks inside the callback implementation to post-process in this hook.
         """

pytorch_lightning/core/hooks.py

@@ -240,6 +240,7 @@ def on_train_epoch_end(self, unused: Optional = None) -> None:
         Called in the training loop at the very end of the epoch.
 
         To access all batch outputs at the end of the epoch, either:
+
         1. Implement `training_epoch_end` in the LightningModule OR
         2. Cache data across steps on the attribute(s) of the `LightningModule` and access them in this hook
         """