Re: `git diff --break-rewrites` does not work (otherwise it should break rewrite into delete and create, for `--find-renames` to work)

> Thank you for filling out a Git bug report!
> Please answer the following questions to help us understand your issue.
> 
> What did you do before the bug happened? (Steps to reproduce your issue)
> 
> cd '/'; cd '/'; rm --force --recursive -- './test_git2'; mkdir "$_"; cd "$_";
> mkdir --parents -- './repo';
> git init './repo'
> echo -e 'a\nb\nc\nd\ne\nf\ng\nh\ni\nj' >'./repo/file1'
> echo -e '0\n1\n2\n3\n4\n5\n6\n7\n8\n9' >'./repo/file2'
> git -C './repo' add './file1' './file2'
> mv './repo/file2' './repo/file3'
> mv './repo/file1' './repo/file2'
> git -C './repo' add --intent-to-add './file3'
> git -C './repo' diff --break-rewrites='50%/50%' --find-renames='50%'
> 
> What did you expect to happen? (Expected behavior)
> 
> `git diff` outputs: file1 rename to file2, file2 rename to file3
> 
> What happened instead? (Actual behavior)
> 
> `git diff` outputs: file1 remove all content, file2 complete rewrite,
> file3 add all content