t / t4013 / diff.diff-tree_initial_modeon commit switch: allow to switch in the middle of bisect (d16dc42)
   1$ git diff-tree initial mode
   2:100644 100755 01e79c32a8c99c557f0757da7cb6d65b3414466d 01e79c32a8c99c557f0757da7cb6d65b3414466d M      file0
   3$