Apply go fix -fmtappendf ./...

internal/backend/cache/cache.go

@@ -125,7 +125,7 @@ func New(id string, basedir string) (c *Cache, err error) {
 	}
 
 	if v < cacheVersion {
-		err = os.WriteFile(filepath.Join(cachedir, "version"), []byte(fmt.Sprintf("%d", cacheVersion)), fileMode)
+		err = os.WriteFile(filepath.Join(cachedir, "version"), fmt.Appendf(nil, "%d", cacheVersion), fileMode)
 		if err != nil {
 			return nil, errors.WithStack(err)
 		}

internal/backend/test/tests.go

@@ -355,7 +355,7 @@ func (s *Suite[C]) TestListCancel(t *testing.T) {
 	testFiles := make([]backend.Handle, 0, numTestFiles)
 
 	for i := 0; i < numTestFiles; i++ {
-		data := []byte(fmt.Sprintf("random test blob %v", i))
+		data := fmt.Appendf(nil, "random test blob %v", i)
 		id := restic.Hash(data)
 		h := backend.Handle{Type: backend.PackFile, Name: id.String()}
 		err := b.Save(context.TODO(), h, backend.NewByteReader(data, b.Hasher()))

internal/repository/repository_test.go

@@ -534,7 +534,7 @@ func TestSaveBlobAsync(t *testing.T) {
 		wg.Add(numCalls)
 		for i := 0; i < numCalls; i++ {
 			// Use unique data for each call
-			testData := []byte(fmt.Sprintf("test blob data %d", i))
+			testData := fmt.Appendf(nil, "test blob data %d", i)
 			uploader.SaveBlobAsync(ctx, restic.DataBlob, testData, restic.ID{}, false,
 				func(newID restic.ID, known bool, size int, err error) {
 					defer wg.Done()
@@ -549,7 +549,7 @@ func TestSaveBlobAsync(t *testing.T) {
 	rtest.OK(t, err)
 
 	for i, result := range results {
-		testData := []byte(fmt.Sprintf("test blob data %d", i))
+		testData := fmt.Appendf(nil, "test blob data %d", i)
 		expectedID := restic.Hash(testData)
 		rtest.Assert(t, result.err == nil, "result %d: unexpected error %v", i, result.err)
 		rtest.Assert(t, result.id.Equal(expectedID), "result %d: expected ID %v, got %v", i, expectedID, result.id)