Document the need to use recountdiff

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Sven van Heugten 2026-03-06 17:31:27 +01:00
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`mechanicaldiff` lets you filter down a diff to _only_ the parts that make a specific mechanical change, so you can commit those changes separately.
Usage: `git diff | mechanicaldiff <pattern> <replacement>`
Usage: `git diff | mechanicaldiff <pattern> <replacement> | recountdiff`
It differs from [grepdiff](https://linux.die.net/man/1/grepdiff) in that it doesnt just search for the lines that contain the given `pattern`, but also checks that the _only_ change in that line is that `pattern` was replaced with the given `replacement`.