gofumpt -w foo.go
cmp foo.go foo.go.golden

gofumpt -d foo.go.golden
! stdout .

-- foo.go --
package p

func f1() { println("single line") }
func f2() { println("single line") }

func f3() {
	println("multiline")
}
func f4() {
	println("multiline")
}

// l1 is a var.
var l1 = []int{
	1, 2,
}
// l2 is a var.
var l2 = []int{
	3, 4,
}

var (
	s3 = `
		ok if grouped together
	`
	s4 = `
		ok if grouped together
	`
)
var _ = "ok if either isn't multiline"
-- foo.go.golden --
package p

func f1() { println("single line") }
func f2() { println("single line") }

func f3() {
	println("multiline")
}

func f4() {
	println("multiline")
}

// l1 is a var.
var l1 = []int{
	1, 2,
}

// l2 is a var.
var l2 = []int{
	3, 4,
}

var (
	s3 = `
		ok if grouped together
	`
	s4 = `
		ok if grouped together
	`
)
var _ = "ok if either isn't multiline"