add ex batch flag -- historically '-', POSIX.2 uses -s
treeb49c3f00605a10b1d9ed4f0b13c42026f1060dc5
-rw-r--r-- 7092 README
drwxr-xr-x - common
drwxr-xr-x - docs
drwxr-xr-x - ex
drwxr-xr-x - vi