Filter issues which have been updated since they closed

Author: Jake Ginnivan

src/GitReleaseNotes/IssueTrackers/GitHub/GitHubIssueTracker.cs

@@ -135,7 +135,7 @@ public IEnumerable<OnlineIssue> GetClosedIssues(DateTimeOffset? since)
                 Since = since,
                 State = ItemState.Closed
             });
-            var readOnlyList = forRepository.Result;
+            var readOnlyList = forRepository.Result.Where(i => i.ClosedAt > since);
 
             var userCache = new Dictionary<string, User>();
             Func<User, string> getUserName = u =>