t / t4013 / diff.diff_--no-index_--raw_dir2_diron commit helper/test-ref-store: fix "new-sha1" vs "old-sha1" typo (3c27e2e)
   1$ git diff --no-index --raw dir2 dir
   2:000000 100644 0000000... 0000000... A  dir/sub
   3$