t / t4013 / diff.diff_--no-index_--raw_--abbrev=4_dir2_diron commit refs: use `size_t` indexes when iterating over ref transaction updates (43a2dfd)
   1$ git diff --no-index --raw --abbrev=4 dir2 dir
   2:000000 100644 0000... 0000... A        dir/sub
   3$