Error in example of learning rate finder docs 
📚 Documentation
There seems to be a minor error in the docs for the learning rate finder functionality of the trainer module. In particular, the example uses trainer.lr_find, however this causes an AttributeError, it should be trainer.tuner.lr_find.
In addition, the page contains two nearly identical examples - one written in the doc file and one generated from the docstring of the function - not sure if this is intended.