Use named arguments when passing null

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers.Test/Verifiers/StyleCopCodeFixVerifier`2.cs

@@ -44,7 +44,7 @@ internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersio
             => StyleCopDiagnosticVerifier<TAnalyzer>.VerifyCSharpDiagnosticAsync(languageVersion, source, expected, cancellationToken);
 
         internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, DiagnosticResult[] expected, CancellationToken cancellationToken)
-            => StyleCopDiagnosticVerifier<TAnalyzer>.VerifyCSharpDiagnosticAsync(languageVersion, source, null, expected, cancellationToken);
+            => StyleCopDiagnosticVerifier<TAnalyzer>.VerifyCSharpDiagnosticAsync(languageVersion, source, settings: null, expected, cancellationToken);
 
         internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, string settings, DiagnosticResult[] expected, CancellationToken cancellationToken)
             => StyleCopDiagnosticVerifier<TAnalyzer>.VerifyCSharpDiagnosticAsync(languageVersion, source, settings, expected, cancellationToken);
@@ -73,10 +73,10 @@ internal static Task VerifyCSharpFixAsync(string source, DiagnosticResult[] expe
         }
 
         internal static Task VerifyCSharpFixAsync(LanguageVersion? languageVersion, string source, DiagnosticResult expected, string fixedSource, CancellationToken cancellationToken)
-            => VerifyCSharpFixAsync(languageVersion, source, null, new[] { expected }, fixedSource, cancellationToken);
+            => VerifyCSharpFixAsync(languageVersion, source, settings: null, new[] { expected }, fixedSource, cancellationToken);
 
         internal static Task VerifyCSharpFixAsync(LanguageVersion? languageVersion, string source, DiagnosticResult[] expected, string fixedSource, CancellationToken cancellationToken)
-            => VerifyCSharpFixAsync(languageVersion, source, null, expected, fixedSource, cancellationToken);
+            => VerifyCSharpFixAsync(languageVersion, source, settings: null, expected, fixedSource, cancellationToken);
 
         internal static Task VerifyCSharpFixAsync(LanguageVersion? languageVersion, string source, string settings, DiagnosticResult[] expected, string fixedSource, CancellationToken cancellationToken)
         {

StyleCop.Analyzers/StyleCop.Analyzers.Test/Verifiers/StyleCopDiagnosticVerifier`1.cs

@@ -39,7 +39,7 @@ internal static Task VerifyCSharpDiagnosticAsync(string source, DiagnosticResult
         }
 
         internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, DiagnosticResult expected, CancellationToken cancellationToken)
-            => VerifyCSharpDiagnosticAsync(languageVersion, source, null, new[] { expected }, cancellationToken);
+            => VerifyCSharpDiagnosticAsync(languageVersion, source, settings: null, new[] { expected }, cancellationToken);
 
         internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, string settings, DiagnosticResult[] expected, CancellationToken cancellationToken)
         {