ref: 864c67531f8f2144c9979a486afd3165c13ee816 dir: rc/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}