SA1027 checks for tab characters within comments

Fixes #1246

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers/SpacingRules/SA1027TabsMustNotBeUsed.cs

@@ -67,6 +67,9 @@ private static void HandleSyntaxTree(SyntaxTreeAnalysisContext context)
                 switch (trivia.Kind())
                 {
                 case SyntaxKind.WhitespaceTrivia:
+                case SyntaxKind.DocumentationCommentExteriorTrivia:
+                case SyntaxKind.SingleLineCommentTrivia:
+                case SyntaxKind.MultiLineCommentTrivia:
                     HandleWhitespaceTrivia(context, trivia);
                     break;