Count removed bytes correctly

[caio]

Hello,

Thanks a lot for gix! I've been playing with it on and off for a while now and am very impressed with the speed and quality of your work.

One of the things I've done is implement my own version of git log -- somefile, which led me to doing my own rename detection and then my results started looking different from gix's

What follows is a patch to fix what I believe is the bug: removed_bytes is being overwritten every time the sink looks at a hunk of changes.

(Qualifying the sum() as sum::<usize>() is required due to multiple impls of std::ops::AddAssign on the type)

[Byron]

Thanks! And thanks for the fix as well, and even with a test, lovely!

I will merge when CI is green.

Regarding rename tracking, you might find interesting the gix-diff will soon receive a generalized version of the rename-tracking engine that already powers rename tracking of tree-diffs. If anything is missing for you that you think gix should support, please do let me know. In theory, it should be possible to use gix to perfectly re-implement git log for example, so the building blocks should be there. You can track this issue which probably will see more diff-related improvements - currently is still a few steps away from being correct in all cases.

[caio]

Glad to hear it! I still have many small things I plan on using gix for- will let you know if anything comes up :)