macro defn
go fmt *
	modified:   broom/builtin.go
	modified:   broom/builtin_test.go
	modified:   broom/object.go
	modified:   broom/pair.go
	modified:   broom/pair_test.go
	modified:   broom/read.go
	modified:   broom/read_test.go
	modified:   broom/sf.go
	modified:   broom/sf_test.go