correct clean command

CLEAN-COMMAND

@@ -1,3 +1,3 @@
 # DESTROYS EVERYTHING! DON'T USE IF YOU DON'T KNOW WHAT YOU ARE DOING!
 # ONLY USE ON FRESH AND NON-PRODUCTIVE SYSTEMS
-umount /target/boot/* /target/* /target; vgchange -an; mdadm --stop /dev/md*; mdadm -zero-superblock /dev/sd*; mdadm --stop /dev/md*;
+umount /target/boot/* /target/* /target; vgchange -an; mdadm --stop /dev/md*; mdadm --zero-superblock /dev/sd*; mdadm --stop /dev/md*;