Fixed new violations of HasDebuggerDisplayAttribute

Octokit/Models/Request/PullRequestReviewCommentRequest.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Diagnostics;
+using System.Globalization;
 
 namespace Octokit
 {
@@ -28,5 +29,10 @@ namespace Octokit
         /// Only comments updated at or after this time are returned. This is a timestamp in ISO 8601 format: YYYY-MM-DDTHH:MM:SSZ.
         /// </summary>
         public DateTimeOffset? Since { get; set; }
+
+        internal string DebuggerDisplay
+        {
+            get { return String.Format(CultureInfo.InvariantCulture, "Sort: {0}, Direction: {1}, Since: {2}", Sort, Direction, Since); }
+        }
     }
 }