Update SA1500 for property initializer

Author: EdwinEngelen

StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp14/LayoutRules/SA1500CSharp14UnitTests.cs

@@ -3,9 +3,39 @@
 
 namespace StyleCop.Analyzers.Test.CSharp14.LayoutRules
 {
+    using System.Threading;
+    using System.Threading.Tasks;
+    using Microsoft.CodeAnalysis.Testing;
     using StyleCop.Analyzers.Test.CSharp13.LayoutRules;
+    using Xunit;
+    using static StyleCop.Analyzers.Test.Verifiers.StyleCopCodeFixVerifier<
+        StyleCop.Analyzers.LayoutRules.SA1500BracesForMultiLineStatementsMustNotShareLine,
+        StyleCop.Analyzers.LayoutRules.SA1500CodeFixProvider>;
 
     public partial class SA1500CSharp14UnitTests : SA1500CSharp13UnitTests
     {
+        /// <summary>
+        /// Verifies that no diagnostics are reported for the valid properties defined in this test.
+        /// </summary>
+        /// <remarks>
+        /// <para>These are valid for SA1500 only, some will report other diagnostics.</para>
+        /// </remarks>
+        /// <returns>A <see cref="Task"/> representing the asynchronous unit test.</returns>
+        [Fact]
+        public async Task TestPropertyDefaultValueAssignmentValidAsync()
+        {
+            var testCode = @"using System;
+
+public class Foo
+{
+    public bool Property1
+    {
+        get { return field; }
+        set { field = value; }
+    } = default;
+}";
+
+            await VerifyCSharpDiagnosticAsync(testCode, DiagnosticResult.EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
+        }
     }
 }

StyleCop.Analyzers/StyleCop.Analyzers/LayoutRules/SA1500BracesForMultiLineStatementsMustNotShareLine.cs

@@ -300,6 +300,7 @@ private static void CheckBraceToken(SyntaxNodeAnalysisContext context, StyleCopS
                 case SyntaxKind.CommaToken:
                 case SyntaxKind.SemicolonToken:
                 case SyntaxKind.DotToken:
+                case SyntaxKind.EqualsToken:
                     // these are allowed to appear on the same line
                     return;