Update trainer.rst (#4722)

small spelling fix

Author: jaymody

CHANGELOG.md

@@ -52,7 +52,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Fixed average pbar Metrics ([#4534](https://github.com/PyTorchLightning/pytorch-lightning/pull/4534))
 - Fixed logger docs and api docs ([#3950](https://github.com/PyTorchLightning/pytorch-lightning/pull/3950))
 - Fixed `setup` callback hook to correctly pass the LightningModule through ([#4608](https://github.com/PyTorchLightning/pytorch-lightning/pull/4608))
-- Fixed docs typo ([#4659](https://github.com/PyTorchLightning/pytorch-lightning/pull/4659), [#4670](https://github.com/PyTorchLightning/pytorch-lightning/pull/4670))
+- Fixed docs typo ([#4659](https://github.com/PyTorchLightning/pytorch-lightning/pull/4659), [#4670](https://github.com/PyTorchLightning/pytorch-lightning/pull/4670),
+                   [##4715](https://github.com/PyTorchLightning/pytorch-lightning/pull/#4715), [##4722](https://github.com/PyTorchLightning/pytorch-lightning/pull/#4722))
 - Fixed notebooks typo ([#4657](https://github.com/PyTorchLightning/pytorch-lightning/pull/4657))
 - Allowing decorate model init with saving `hparams` inside ([#4662](https://github.com/PyTorchLightning/pytorch-lightning/pull/4662))
 - Fixed `split_idx` set by `LoggerConnector` in `on_trainer_init` to `Trainer`  ([#4697](https://github.com/PyTorchLightning/pytorch-lightning/pull/4697))

docs/source/trainer.rst

@@ -54,7 +54,7 @@ Under the hood
 --------------
 Under the hood, the Lightning Trainer handles the training loop details for you, some examples include:
 
-- Automatically eenabling/disabling grads
+- Automatically enabling/disabling grads
 - Running the training, validation and test dataloaders
 - Calling the Callbacks at the appropriate times
 - Putting batches and computations on the correct devices