[!gofumpt] skip 'would remove the unused imports'

gofumpt -w f1.go f2.go
cmp f1.go f1.go.golden
cmp f2.go f2.go.golden

gofumpt -d f1.go.golden f2.go.golden
! stdout .

-- f1.go --
package p

import "non-grouped"

import (
	"grouped"
)

var single = "foo"

var (
	// verbose is verbose.
	verbose = "bar"
)

// This entire block has a comment.
var (
	groupComment = "bar"
)

var (
	multiple1 string
	multiple2 string
)

const (
	first = iota
)

var (
	multiline = []string{
		"foo",
		"bar",
	}
)
-- f1.go.golden --
package p

import "non-grouped"

import (
	"grouped"
)

var single = "foo"

// verbose is verbose.
var verbose = "bar"

// This entire block has a comment.
var (
	groupComment = "bar"
)

var (
	multiple1 string
	multiple2 string
)

const (
	first = iota
)

var multiline = []string{
	"foo",
	"bar",
}
-- f2.go --
package p

func _() {
	var (
		_ int
	)
}
-- f2.go.golden --
package p

func _() {
	var _ int
}