Patch this automatically for all tests rather than duplicating the
boilerplate in diff testcases.
Change-Id: I391d5c859974cda3d5680d34ede2ce6e9e925838
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/354358
Reviewed-by: Joanna Wang <jojwang@google.com>
Tested-by: Mike Frysinger <vapier@google.com>
