Fix formatting and license header for block I/O changes

Author: chrisgeo

Sources/Containerization/LinuxBlockIO.swift

@@ -1,5 +1,5 @@
 //===----------------------------------------------------------------------===//
-// Copyright © 2025-2026 Apple Inc. and the Containerization project authors.
+// Copyright © 2026 Apple Inc. and the Containerization project authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

Tests/ContainerizationTests/LinuxContainerTests.swift

@@ -17,10 +17,10 @@
 import Foundation
 import Testing
 
-@testable import Containerization
-
 import struct ContainerizationOCI.ImageConfig
 
+@testable import Containerization
+
 struct LinuxContainerTests {
 
     @Test func processInitFromImageConfigWithAllFields() {