fix format

packages/stream_chat_flutter/example/lib/main.dart

@@ -87,7 +87,7 @@ class MyApp extends StatelessWidget {
 
 /// A list of messages sent in the current channel.
 ///
-/// This is implemented using [StreamMessageListView], 
+/// This is implemented using [StreamMessageListView],
 /// a widget that provides query
 /// functionalities fetching the messages from the api and showing them in a
 /// listView.

packages/stream_chat_flutter/example/lib/tutorial_part_1.dart

@@ -27,7 +27,7 @@ import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 /// - We make [StreamChat] the root Widget of our application
 ///
 /// - We create a single [ChannelPage] widget under [StreamChat] with three
-/// widgets: [StreamChannelHeader], [StreamMessageListView] 
+/// widgets: [StreamChannelHeader], [StreamMessageListView]
 /// and [StreamMessageInput]
 ///
 /// If you now run the simulator you will see a single channel UI.

packages/stream_chat_flutter/example/lib/tutorial_part_2.dart

@@ -25,7 +25,7 @@ import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 /// The [ChannelListPage] widget retrieves the list of channels based on a
 /// custom query and ordering. In this case we are showing the list of
 /// channels in which the current user is a member and we order them based
-/// on the time they had a new message. 
+/// on the time they had a new message.
 /// [StreamChannelListView] handles pagination
 /// and updates automatically when new channels are created or when a new
 /// message is added to a channel.