[Feature request] -p preview mode shows a diff of what would happen (with customizable differ) instead of just doing what sed does.

[tracure1337]

[Feature request] -p preview mode shows a diff of what would happen (with customizable differ) instead of just doing what sed does.

Thank you for your consideration!

[oriongonza]

This is already in the works!

[nc7s]

I'm working on that in #238. Suggestions and feedback are welcome.

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