Update SA1608 to use new base class

Author: nbarbettini

StyleCop.Analyzers/StyleCop.Analyzers/DocumentationRules/SA1608ElementDocumentationMustNotHaveDefaultSummary.cs

@@ -4,6 +4,7 @@
 namespace StyleCop.Analyzers.DocumentationRules
 {
     using System;
+    using System.Collections.Generic;
     using System.Collections.Immutable;
     using System.Linq;
     using System.Xml.Linq;
@@ -32,7 +33,7 @@ namespace StyleCop.Analyzers.DocumentationRules
     /// default documentation text generated by Visual Studio.</para>
     /// </remarks>
     [DiagnosticAnalyzer(LanguageNames.CSharp)]
-    internal class SA1608ElementDocumentationMustNotHaveDefaultSummary : ElementDocumentationSummaryBase
+    internal class SA1608ElementDocumentationMustNotHaveDefaultSummary : ElementDocumentationBase
     {
         /// <summary>
         /// The ID for diagnostics produced by the <see cref="SA1608ElementDocumentationMustNotHaveDefaultSummary"/>
@@ -49,45 +50,51 @@ internal class SA1608ElementDocumentationMustNotHaveDefaultSummary : ElementDocu
         private static readonly DiagnosticDescriptor Descriptor =
             new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat, AnalyzerCategory.DocumentationRules, DiagnosticSeverity.Warning, AnalyzerConstants.EnabledByDefault, Description, HelpLink);
 
-        private static readonly ImmutableArray<SyntaxKind> DocumentationCommentKinds =
-            ImmutableArray.Create(SyntaxKind.SingleLineDocumentationCommentTrivia, SyntaxKind.MultiLineDocumentationCommentTrivia);
+        public SA1608ElementDocumentationMustNotHaveDefaultSummary()
+            : base(inheritDocSuppressesWarnings: true, matchElementName: XmlCommentHelper.SummaryXmlTag)
+        {
+        }
 
         /// <inheritdoc/>
         public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; } =
             ImmutableArray.Create(Descriptor);
 
         /// <inheritdoc/>
-        protected override void HandleXmlElement(SyntaxNodeAnalysisContext context, DocumentationCommentTriviaSyntax documentation, XmlNodeSyntax syntax, XElement completeDocumentation, params Location[] diagnosticLocations)
-        {
-            if (completeDocumentation != null)
+        protected override void HandleXmlElement(SyntaxNodeAnalysisContext context, IEnumerable<XmlNodeSyntax> syntaxList, params Location[] diagnosticLocations)
         {
-                // We are working with an <include> element
-                var includedSummaryElement = completeDocumentation.Nodes().OfType<XElement>().FirstOrDefault(element => element.Name == XmlCommentHelper.SummaryXmlTag);
-                if (includedSummaryElement != null)
-        {
-                    string text = includedSummaryElement.Value;
+            foreach (var syntax in syntaxList)
+            {
+                var summaryElement = syntax as XmlElementSyntax;
+                var textElement = summaryElement?.Content.FirstOrDefault() as XmlTextSyntax;
+                if (textElement != null)
+                {
+                    string text = XmlCommentHelper.GetText(textElement, true);
 
                     if (IsDefaultText(text))
-            {
-                        context.ReportDiagnostic(Diagnostic.Create(Descriptor, diagnosticLocations.First()));
+                    {
+                        context.ReportDiagnostic(Diagnostic.Create(Descriptor, summaryElement.GetLocation()));
                         return;
                     }
                 }
             }
+        }
 
-            var summaryElement = syntax as XmlElementSyntax;
-            var textElement = summaryElement?.Content.FirstOrDefault() as XmlTextSyntax;
-                    if (textElement != null)
-                    {
-                        string text = XmlCommentHelper.GetText(textElement, true);
+        /// <inheritdoc/>
+        protected override void HandleCompleteDocumentation(SyntaxNodeAnalysisContext context, XElement completeDocumentation, params Location[] diagnosticLocations)
+        {
+            // We are working with an <include> element
+            var includedSummaryElement = completeDocumentation.Nodes().OfType<XElement>().FirstOrDefault(element => element.Name == XmlCommentHelper.SummaryXmlTag);
+            if (includedSummaryElement != null)
+            {
+                string text = includedSummaryElement.Value;
 
                 if (IsDefaultText(text))
-                            {
-                                context.ReportDiagnostic(Diagnostic.Create(Descriptor, summaryElement.GetLocation()));
+                {
+                    context.ReportDiagnostic(Diagnostic.Create(Descriptor, diagnosticLocations.First()));
                     return;
-                            }
-                        }
-                    }
+                }
+            }
+        }
 
         private static bool IsDefaultText(string text)
         {