(from "scratch")
(copy "foo" "/tmp/")
(copy ["--user=me"] "foo" "/tmp/")
(copy ["--doit=true"] "foo" "/tmp/")
(copy ["--user=me" "--doit=true"] "foo" "/tmp/")
(copy ["--doit=true"] "foo" "/tmp/")
(copy "foo" "/tmp/")
(cmd ["--doit"] "a" "b")
(cmd ["--doit=true"] "a" "b")
(cmd ["--doit"])