storegateway: fix code comments

Signed-off-by: Vladimir Varankin <vladimir.varankin@grafana.com>

pkg/storegateway/bucket.go

@@ -360,7 +360,7 @@ func (s *BucketStore) syncBlocks(ctx context.Context, initialSync bool) error {
 		level.Info(s.logger).Log("msg", "dropped outdated block", "block", id)
 	}
 
-	// Start snapshotter in the end of the sync, but do that only once per BucketStore's life time.
+	// Start snapshotter in the end of the sync, but do that only once per BucketStore's lifetime.
 	// We do that here so the snapshotter watched after blocks from both initial sync and those discovered later.
 	var err error
 	s.snapshotterStartOnce.Do(func() {

pkg/storegateway/indexheader/snapshotter.go

@@ -102,8 +102,7 @@ func (s *Snapshotter) RestoreLoadedBlocks() map[ulid.ULID]int64 {
 	err := loadIndexHeadersSnapshot(fileName, &snapshot)
 	if err != nil {
 		if os.IsNotExist(err) {
-			// We didn't find the snapshot. Could be because we crashed after restoring it last time
-			// or because the previous binary didn't support eager loading.
+			// We didn't find the snapshot. Could be because the previous binary didn't support eager loading.
 			return nil
 		}
 		level.Warn(s.logger).Log(