Enable NRT in some files (reverted in an earlier commit)

Author: bjornhellander

StyleCop.Analyzers/StyleCop.Analyzers.Test/OrderingRules/SA1208UnitTests.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Contributors to the New StyleCop Analyzers project.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
-
 namespace StyleCop.Analyzers.Test.OrderingRules
 {
     using System.Threading;

StyleCop.Analyzers/StyleCop.Analyzers.Test/OrderingRules/SA1209UnitTests.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Contributors to the New StyleCop Analyzers project.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
-
 namespace StyleCop.Analyzers.Test.OrderingRules
 {
     using System.Threading;

StyleCop.Analyzers/StyleCop.Analyzers.Test/OrderingRules/SA1210CombinedSystemDirectivesUnitTests.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Contributors to the New StyleCop Analyzers project.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
-
 namespace StyleCop.Analyzers.Test.OrderingRules
 {
     using System.Threading;
@@ -222,15 +220,19 @@ public async Task TestPreprocessorDirectivesAsync()
         private static Task VerifyCSharpDiagnosticAsync(string source, DiagnosticResult[] expected, CancellationToken cancellationToken)
             => VerifyCSharpFixAsync(source, expected, fixedSource: null, cancellationToken);
 
-        private static Task VerifyCSharpFixAsync(string source, DiagnosticResult[] expected, string fixedSource, CancellationToken cancellationToken)
+        private static Task VerifyCSharpFixAsync(string source, DiagnosticResult[] expected, string? fixedSource, CancellationToken cancellationToken)
         {
             var test = new StyleCopCodeFixVerifier<SA1210UsingDirectivesMustBeOrderedAlphabeticallyByNamespace, UsingCodeFixProvider>.CSharpTest
             {
                 TestCode = source,
-                FixedCode = fixedSource,
                 Settings = CombinedUsingDirectivesTestSettings,
             };
 
+            if (fixedSource != null)
+            {
+                test.FixedCode = fixedSource;
+            }
+
             test.ExpectedDiagnostics.AddRange(expected);
             return test.RunAsync(cancellationToken);
         }

StyleCop.Analyzers/StyleCop.Analyzers.Test/OrderingRules/SA1210UnitTests.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Contributors to the New StyleCop Analyzers project.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
-
 namespace StyleCop.Analyzers.Test.OrderingRules
 {
     using System.Threading;

StyleCop.Analyzers/StyleCop.Analyzers.Test/OrderingRules/UsingCodeFixProviderCombinedSystemDirectivesUnitTests.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Contributors to the New StyleCop Analyzers project.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
-
 namespace StyleCop.Analyzers.Test.OrderingRules
 {
     using System.Threading;

StyleCop.Analyzers/StyleCop.Analyzers.Test/OrderingRules/UsingCodeFixProviderGroupSeparationUnitTests.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Contributors to the New StyleCop Analyzers project.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
-
 namespace StyleCop.Analyzers.Test.OrderingRules
 {
     using System.Threading;

StyleCop.Analyzers/StyleCop.Analyzers.Test/OrderingRules/UsingCodeFixProviderUnitTests.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Contributors to the New StyleCop Analyzers project.
 // Licensed under the MIT License. See LICENSE in the project root for license information.
 
-#nullable disable
-
 namespace StyleCop.Analyzers.Test.OrderingRules
 {
     using System.Threading;