anchor.diff:  
   export 'dart:ui' show TextAffinity;
   
  -/// For which type of information to optimize the text input control.
  +/// The type of information for which to optimize the text input control.
   enum TextInputType {
     /// Optimize for textual information.
     text,
  
positive.code:   datetime,
  }
  
  /// A action the user has requested the text input control to perform.
  enum TextInputAction {
    /// Complete the text input operation.
    done,
  
negative.code:     this.actionLabel,
    });
  
    /// The type of information for which to optimize the text input control.
    final TextInputType inputType;
  
    /// What text to display in the text input control's action button.
  