chore(example): code clean up

Author: jogboms

example/lib/demo_page.dart

@@ -10,9 +10,9 @@ class DemoPage extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text("Offline Demo"),
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("Offline Demo"),
       ),
       body: child,
     );

example/lib/main.dart

@@ -5,14 +5,14 @@ import './widgets/demo_1.dart';
 import './widgets/demo_2.dart';
 import './widgets/demo_3.dart';
 
-void main() => runApp(new MyApp());
+void main() => runApp(MyApp());
 
 class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return new MaterialApp(
+    return MaterialApp(
       title: 'Offline Demo',
-      theme: new ThemeData.dark(),
+      theme: ThemeData.dark(),
       home: Builder(
         builder: (BuildContext context) {
           return Column(

example/lib/widgets/demo_1.dart

@@ -51,12 +51,8 @@ class Demo1 extends StatelessWidget {
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: <Widget>[
-          new Text(
-            'There are no bottons to push :)',
-          ),
-          new Text(
-            'Just turn off your internet.',
-          ),
+          Text('There are no bottons to push :)'),
+          Text('Just turn off your internet.'),
         ],
       ),
     );

example/lib/widgets/demo_2.dart

@@ -26,15 +26,11 @@ class Demo2 extends StatelessWidget {
       },
       builder: (BuildContext context) {
         return Center(
-          child: new Column(
+          child: Column(
             mainAxisAlignment: MainAxisAlignment.center,
             children: <Widget>[
-              new Text(
-                'There are no bottons to push :)',
-              ),
-              new Text(
-                'Just turn off your internet.',
-              ),
+              Text('There are no bottons to push :)'),
+              Text('Just turn off your internet.'),
             ],
           ),
         );

example/lib/widgets/demo_3.dart

@@ -25,18 +25,12 @@ class Demo3 extends StatelessWidget {
         return child;
       },
       child: Center(
-        child: new Column(
+        child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
-            new Text(
-              'There are no bottons to push :)',
-            ),
-            new Text(
-              'Just turn off your internet.',
-            ),
-            new Text(
-              'This one has a bit of a delay.',
-            ),
+            Text('There are no bottons to push :)'),
+            Text('Just turn off your internet.'),
+            Text('This one has a bit of a delay.'),
           ],
         ),
       ),