--unpack-dir seems to have different behaviors on OS X and Windows

[romaincointepas]

For example, with the following tree:

dir1
  file1.txt
  dir2
    file2.txt
    dir3
      file3.txt

--unpack-dir "dir1" on OS X will unpack everything:

dir1
  file1.txt
  dir2
    file2.txt
    dir3
      file3.txt

--unpack-dir "dir1" on Windows will only unpack root-level files:

dir1
  file1.txt

--unpack-dir "dir1/**/*" on Windows will unpack everything except root-level files:

dir1
  dir2
    file2.txt
    dir3
      file3.txt

--unpack-dir "{dir1,dir1/**/*}" on Windows will unpack everything:

dir1
  file1.txt
  dir2
    file2.txt
    dir3
      file3.txt

---

IMO, the OS X behavior seems to be the most logical one (--unpack-dir "dir" usually means that I want to unpack the entire directory including all its content).