Update SA1116 for static anonymous functions

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp9/ReadabilityRules/SA1116CSharp9UnitTests.cs

@@ -51,5 +51,39 @@ public void Method()
             DiagnosticResult expected = Diagnostic().WithLocation(10, 21);
             await VerifyCSharpFixAsync(testCode, expected, fixedCode, CancellationToken.None).ConfigureAwait(false);
         }
+
+        [Fact]
+        [WorkItem(3973, "https://github.com/DotNetAnalyzers/StyleCopAnalyzers/issues/3973")]
+        public async Task TestStaticAnonymousFunctionFirstParameterOnSameLineAsync()
+        {
+            var testCode = @"
+using System;
+
+public class TestClass
+{
+    public void TestMethod()
+    {
+        Func<int, int, int> func = static ({|#0:int first|},
+            int second) => first + second;
+    }
+}
+";
+
+            var fixedCode = @"
+using System;
+
+public class TestClass
+{
+    public void TestMethod()
+    {
+        Func<int, int, int> func = static (
+            int first,
+            int second) => first + second;
+    }
+}
+";
+
+            await VerifyCSharpFixAsync(testCode, Diagnostic().WithLocation(0), fixedCode, CancellationToken.None).ConfigureAwait(false);
+        }
     }
 }