Feature Request of Diff Feature

[dtaniwaki]

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Thank you for developing a great tool. I recently started to use this tool because I want to use the fixer feature. However, I realized there's no way to check diff without actually fixing my files. Could you consider adding diff feature so I can go ahead applying the changes without worries?

[dtaniwaki]

I also realized fixer doesn't mention what it fixed.

[yoheimuta]

@dtaniwaki Thank you for your nice feedback! It sounds useful. I attached the label to this issue for now.