[Docs] redundant whitespace included in debugging section code, new-project.rst
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Thanks!

Typo
https://pytorch-lightning.readthedocs.io/en/latest/new-project.html#debugging
# train only 20% of an epoch
trainer = pl. Trainer(limit_train_batches=0.2)

This works, but I think it should be aligned in appearance with the rest of the code.
Fix
trainer = pl.Trainer(limit_train_batches=0.2)  # remove redundant whitespace 

I will submit a PR later