Wrap errors, not Unwrap

Fixes #237

Author: quite

diskfs.go

@@ -344,11 +344,11 @@ func Create(device string, size int64, _ Format, sectorSize SectorSize) (*disk.D
 	}
 	f, err := os.OpenFile(device, os.O_RDWR|os.O_EXCL|os.O_CREATE, 0o666)
 	if err != nil {
-		return nil, fmt.Errorf("could not create device %s: %v", device, errors.Unwrap(err))
+		return nil, fmt.Errorf("could not create device %s: %w", device, err)
 	}
 	err = os.Truncate(device, size)
 	if err != nil {
-		return nil, fmt.Errorf("could not expand device %s to size %d: %v", device, size, errors.Unwrap(err))
+		return nil, fmt.Errorf("could not expand device %s to size %d: %w", device, size, err)
 	}
 	// return our disk
 	return initDisk(f, ReadWriteExclusive, sectorSize)