recent_senders [nfc]: Write "sorted ascending"

Author: gnprice

lib/model/recent_senders.dart

@@ -101,7 +101,7 @@ class RecentSenders {
 
 @visibleForTesting
 class MessageIdTracker {
-  /// A list of distinct message IDs, sorted ascendingly.
+  /// A list of distinct message IDs, sorted ascending.
   @visibleForTesting
   QueueList<int> ids = QueueList();
 
@@ -128,7 +128,7 @@ class MessageIdTracker {
 
   /// Add the messages IDs to the tracker list at the proper place, if not present.
   ///
-  /// [newIds] should be sorted ascendingly.
+  /// [newIds] should be sorted ascending.
   void addAll(QueueList<int> newIds) {
     if (ids.isEmpty) {
       ids = newIds;

test/model/recent_senders_test.dart

@@ -4,7 +4,7 @@ import 'package:zulip/api/model/model.dart';
 import 'package:zulip/model/recent_senders.dart';
 import '../example_data.dart' as eg;
 
-/// [messages] should be sorted by [id] ascendingly.
+/// [messages] should be sorted by [id] ascending.
 void checkMatchesMessages(RecentSenders model, List<Message> messages) {
   final Map<int, Map<int, Set<int>>> messagesByUserInStream = {};
   final Map<int, Map<String, Map<int, Set<int>>>> messagesByUserInTopic = {};