t / t4013 / diff.diff_--no-index_--raw_--abbrev=4_dir2_diron commit Merge branch 'ah/doc-filter-branch-export-env' (5160b82)
   1$ git diff --no-index --raw --abbrev=4 dir2 dir
   2:000000 100644 0000... 0000... A        dir/sub
   3$