diff on rename misleading

[extrawurst]

right now a rename-diff looks like a huge delete-everything and add-everything:

[extrawurst]

work in progress in branch rename-detection

[naseschwarz]

Could you please elaborate on your expectation here, @extrawurst? Something akin to how git log displays renames?

[extrawurst]

This particular issue is only about showing the content diff correctly, so that the file content diff looks like it looks if you did not also rename the file at the same time. hope that makes more sense.

examples:

• if nothing changed inside of the file: empty diff (maybe mark it in the header that its a pure rename)
• if its a rename that changed one inside the file aswell: lets show that diff only, like it would if the filename was not also changed at the same time