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

gofumpt -d foo.go.golden
! stdout .

-- foo.go --
package p

var _ = []string{


	"foo",
}

var _ = []string{

	"foo",
}

var _ = []string{

	// joint comment
	"foo",
}

var _ = []string{
	// separate comment

	"foo",
}

var _ = map[string]string{


	"foo": "bar",
}

var _ = map[string]string{

	"foo": "bar",
}

var _ = map[string]string{

	// joint comment
	"foo": "bar",
}

var _ = map[string]string{
	// separate comment

	"foo": "bar",
}

var _ = map[string]string{
	/*
		joint comment
	*/
	"foo": "bar",
}

-- foo.go.golden --
package p

var _ = []string{
	"foo",
}

var _ = []string{
	"foo",
}

var _ = []string{
	// joint comment
	"foo",
}

var _ = []string{
	// separate comment

	"foo",
}

var _ = map[string]string{
	"foo": "bar",
}

var _ = map[string]string{
	"foo": "bar",
}

var _ = map[string]string{
	// joint comment
	"foo": "bar",
}

var _ = map[string]string{
	// separate comment

	"foo": "bar",
}

var _ = map[string]string{
	/*
		joint comment
	*/
	"foo": "bar",
}