Add whitespace in TemplateContentLoader

src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/TemplateContentLoader.cs

@@ -1,4 +1,4 @@
-// Licensed to the .NET Foundation under one or more agreements.
+// Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
@@ -22,7 +22,7 @@ private static T RequireService<T>(IServiceProvider provider) where T : class
             T result = provider.GetService(typeof(T)) as T;
             if (result == null)
             {
-                throw new InvalidOperationException(SR.Format(SR.DeferringLoaderNoContext,nameof(TemplateContentLoader), typeof(T).Name));
+                throw new InvalidOperationException(SR.Format(SR.DeferringLoaderNoContext, nameof(TemplateContentLoader), typeof(T).Name));
             }
             return result;
         }