Don't generate git patches that rename a file to multiple destinations With this patch, instead of generating N renames, we'll generate 1 rename and N-1 copies. Ideally the rename should come after the copies instead of before them, but that'd be harder to do.

Is there an error message when trying to diff non-existing files?
found: No such file or directory
not: No such file or directory
Is there an error message when trying to add non-existing files?
found: No such file or directory
not: No such file or directory