Running code through a deterministic formatter definitely helps a lot, but I've generally found LLMs' comments to add no-to-negative value. They just say what code does, typically very verbosely that just inflates files more while also just stating the most obvious aspects of the code and not adding any meaning behind it because they obviously don't know that. Not to the mention all the cases where they make mistakes and then you have code you don't intuitively understand and also have comments telling you it does something it doesn't.