all: apply modernisers

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/store/store_test.go

@@ -29,7 +29,7 @@ func TestStoreBigLock(t *testing.T) {
 
 	{
 		s := store.New(check.MustAbs(t.TempDir()).Append("state"))
-		for i := 0; i < 2; i++ { // check once behaviour
+		for range 2 { // check once behaviour
 			if unlock, err := bigLock(s); err != nil {
 				t.Fatalf("bigLock: error = %v", err)
 			} else {
@@ -43,7 +43,7 @@ func TestStoreBigLock(t *testing.T) {
 
 		wantErr := &hst.AppError{Step: "create state store directory",
 			Err: &os.PathError{Op: "mkdir", Path: "/proc/nonexistent", Err: syscall.ENOENT}}
-		for i := 0; i < 2; i++ { // check once behaviour
+		for range 2 { // check once behaviour
 			if _, err := bigLock(store.New(check.MustAbs("/proc/nonexistent"))); !reflect.DeepEqual(err, wantErr) {
 				t.Errorf("bigLock: error = %#v, want %#v", err, wantErr)
 			}