t / t4013 / diff.diff_--no-index_--raw_--abbrev=4_dir2_diron commit sha1_file: convert read_sha1_file to struct object_id (b4f5aca)
   1$ git diff --no-index --raw --abbrev=4 dir2 dir
   2:000000 100644 0000... 0000... A        dir/sub
   3$