Fix warnings

Author: JimBobSquarePants

shared-infrastructure

@@ -1,10 +1,10 @@
-// Copyright (c) Six Labors.
+// Copyright (c) Six Labors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
+
 namespace SixLabors.ImageSharp.Drawing.Tests
 {
-    using System;
-
     /// <summary>
     /// The output produced by this test class should be grouped into the specified subfolder.
     /// </summary>
@@ -17,4 +17,4 @@ public GroupOutputAttribute(string subfolder)
 
         public string Subfolder { get; }
     }
-}
+}