anchor.diff:           ),
         ],
       ),
  -    floatingActionButton: FloatingActionButton(
  -      onPressed: _incrementCounter,
  -      tooltip: 'Increment',
  -      child: Icon(Icons.add),
  -    ),
  +  ),
  +  floatingActionButton: FloatingActionButton(
  +    onPressed: _incrementCounter,
  +    tooltip: 'Increment',
  +    child: Icon(Icons.add),
     ),
   );
   ```
  
positive.code:     title: Text(widget.title),
    ),
    body: Center(
      mainAxisAlignment: MainAxisAlignment.center,
      child: Column(
        children: <Widget>[
          Text(
            'You have pushed the button this many times:',
  
negative.code:       ],
        mainAxisAlignment: MainAxisAlignment.center,
      ),
      widthFactor: 0.5,
    ),
    floatingActionButton: FloatingActionButton(
      child: Icon(Icons.add),
      onPressed: _incrementCounter,
      tooltip: 'Increment',
    ),
  );
  ```
  