ref: 78c17415a54f4b8a269fde680dc0cd513ea07690 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}