re-flow comments in the create template (#11413)

packages/flutter_tools/templates/create/lib/main.dart.tmpl

@@ -26,13 +26,12 @@ class MyApp extends StatelessWidget {
       theme: new ThemeData(
         // This is the theme of your application.
         //
-        // Try running your application with "flutter run". You'll see
-        // the application has a blue toolbar. Then, without quitting
-        // the app, try changing the primarySwatch below to Colors.green
-        // and then invoke "hot reload" (press "r" in the console where
-        // you ran "flutter run", or press Run > Hot Reload App in
-        // IntelliJ). Notice that the counter didn't reset back to zero;
-        // the application is not restarted.
+        // Try running your application with "flutter run". You'll see the
+        // application has a blue toolbar. Then, without quitting the app, try
+        // changing the primarySwatch below to Colors.green and then invoke
+        // "hot reload" (press "r" in the console where you ran "flutter run",
+        // or press Run > Hot Reload App in IntelliJ). Notice that the counter
+        // didn't reset back to zero; the application is not restarted.
         primarySwatch: Colors.blue,
       ),
       home: new MyHomePage(title: 'Flutter Demo Home Page'),
@@ -43,14 +42,14 @@ class MyApp extends StatelessWidget {
 class MyHomePage extends StatefulWidget {
   MyHomePage({Key key, this.title}) : super(key: key);
 
-  // This widget is the home page of your application. It is stateful,
-  // meaning that it has a State object (defined below) that contains
-  // fields that affect how it looks.
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
 
-  // This class is the configuration for the state. It holds the
-  // values (in this case the title) provided by the parent (in this
-  // case the App widget) and used by the build method of the State.
-  // Fields in a Widget subclass are always marked "final".
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
 
   final String title;
 
@@ -63,50 +62,46 @@ class _MyHomePageState extends State<MyHomePage> {
 
   void _incrementCounter() {
     setState(() {
-      // This call to setState tells the Flutter framework that
-      // something has changed in this State, which causes it to rerun
-      // the build method below so that the display can reflect the
-      // updated values. If we changed _counter without calling
-      // setState(), then the build method would not be called again,
-      // and so nothing would appear to happen.
+      // This call to setState tells the Flutter framework that something has
+      // changed in this State, which causes it to rerun the build method below
+      // so that the display can reflect the updated values. If we changed
+      // _counter without calling setState(), then the build method would not be
+      // called again, and so nothing would appear to happen.
       _counter++;
     });
   }
 
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance
-    // as done by the _incrementCounter method above.
-    // The Flutter framework has been optimized to make rerunning
-    // build methods fast, so that you can just rebuild anything that
-    // needs updating rather than having to individually change
-    // instances of widgets.
+    // This method is rerun every time setState is called, for instance as done
+    // by the _incrementCounter method above.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
     return new Scaffold(
       appBar: new AppBar(
-        // Here we take the value from the MyHomePage object that
-        // was created by the App.build method, and use it to set
-        // our appbar title.
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
         title: new Text(widget.title),
       ),
       body: new Center(
-        // Center is a layout widget. It takes a single child and
-        // positions it in the middle of the parent.
+        // Center is a layout widget. It takes a single child and positions it
+        // in the middle of the parent.
         child: new Column(
-          // Column is also layout widget. It takes a list of children
-          // and arranges them vertically. By default, it sizes itself
-          // to fit its children horizontally, and tries to be as tall
-          // as its parent.
+          // Column is also layout widget. It takes a list of children and
+          // arranges them vertically. By default, it sizes itself to fit its
+          // children horizontally, and tries to be as tall as its parent.
           //
-          // Invoke "debug paint" (press "p" in the console where you
-          // ran "flutter run", or select "Toggle Debug Paint" from the
-          // Flutter tool window in IntelliJ) to see the wireframe for
-          // each widget.
+          // Invoke "debug paint" (press "p" in the console where you ran
+          // "flutter run", or select "Toggle Debug Paint" from the Flutter tool
+          // window in IntelliJ) to see the wireframe for each widget.
           //
-          // Column has various properties to control how it sizes
-          // itself and how it positions its children. Here we use
-          // mainAxisAlignment to center the children vertically; the
-          // main axis here is the vertical axis because Columns are
-          // vertical (the cross axis would be horizontal).
+          // Column has various properties to control how it sizes itself and
+          // how it positions its children. Here we use mainAxisAlignment to
+          // center the children vertically; the main axis here is the vertical
+          // axis because Columns are vertical (the cross axis would be
+          // horizontal).
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
             new Text(