ref: 97d4770b49d386a1cd9493f95d880d16d5c5ad55 dir: /harmful/☭cp/
#!/bin/rc tar c `' '{diff <{lr -dQ $1 | sort} <{cd $2 && lr -dQ $1 | sort} | sed -n '/^< /s/^< //p'} | @{cd $2 && tar xT}