Fix rendering of escape characters in string literals.

Fixes #125

TestCode/Project2/Class1.cs

@@ -5,6 +5,7 @@ using System.Runtime.InteropServices;
 
 public static class Extensions
 {
+    public static string NewLine => "\r\n";
     public static void ExtensionMethod(this string s)
     {
         var s1 = new string(new char[0]);

src/HtmlGenerator/Pass1-Generation/Classifier.cs

@@ -30,7 +30,10 @@ namespace Microsoft.SourceBrowser.HtmlGenerator
             // classified spans will be emitted for the same TextSpan. This will filter our those classified spans
             // since they are "extra" information and do not represent the identifier type. This filter can be
             // removed after taking Roslyn 3.1.0 as the classifier will filter before returning classified spans.
-            var ranges = classifiedSpans.Where(classifiedSpan => classifiedSpan.ClassificationType != ClassificationTypeNames.StaticSymbol)
+            var ranges = classifiedSpans.Where(classifiedSpan => 
+                classifiedSpan.ClassificationType != ClassificationTypeNames.StaticSymbol &&
+                classifiedSpan.ClassificationType != ClassificationTypeNames.StringEscapeCharacter &&
+                !classifiedSpan.ClassificationType.StartsWith("regex"))
                 .Select(classifiedSpan =>
                     new Range
                     {