anchor.diff:  /// Futures are often used for potentially lengthy computations
   /// such as I/O and interaction with users.
   ///
  -/// Many methods in the Dart libraries return Futures when
  -/// performing tasks. For example, when binding an HttpServer
  +/// Many methods in the Dart libraries return `Future`s when
  +/// performing tasks. For example, when binding an `HttpServer`
   /// to a host and port, the `bind()` method returns a Future.
   /// ```dart
   ///  HttpServer.bind('127.0.0.1', 4444)
  
positive.code: /// Support for asynchronous programming,
  /// with classes such as Future and Stream.
  ///
  /// Understanding [Future]s and [Stream]s is a prerequisite for
  /// writing just about any Dart program.
  ///
  /// To use this library in your code:
  /// ```dart
  
negative.code: /// Another common use of streams is for user-generated events
  /// in a web app: The following code listens for mouse clicks on a button.
  /// ```dart
  /// querySelector('#myButton').onClick.forEach((_) => print('Click.'));
  /// ```
  /// ## Other resources
  ///
  