anchor.diff:    /// system as part of the implementation of `frac` for the denominator
     /// part of fractions (see [FontFeature.fractions]).
     ///
  -  /// {@tool sample --template=freeform}
  +  /// {@tool sample --template=stateless_widget}
     ///
     /// The Piazzolla font supports the `dnom` feature. It causes
     /// the digits to be rendered smaller and near the bottom of the EM box.
     ///
  +  /// ```dart dartImports
  +  /// import 'dart:ui';
  +  /// ```
  +  ///
     /// ```dart
  -  /// class Demo extends StatelessWidget {
  +  /// Widget build(BuildContext context) {
     ///   // The Piazzolla font can be downloaded from Google Fonts (https://www.google.com/fonts).
  -  ///   @override
  -  ///   Widget build(BuildContext context) {
  -  ///     return Text(
  -  ///       'Fractions: 1/2 2/3 3/4 4/5',
  -  ///       style: TextStyle(
  -  ///         fontFamily: 'Piazzolla',
  -  ///         fontFeatures: <FontFeature>[
  -  ///           FontFeature.denominator(),
  -  ///         ],
  -  ///       ),
  -  ///     );
  -  ///   }
  +  ///   return const Text(
  +  ///     'Fractions: 1/2 2/3 3/4 4/5',
  +  ///     style: TextStyle(
  +  ///       fontFamily: 'Piazzolla',
  +  ///       fontFeatures: <FontFeature>[
  +  ///         FontFeature.denominator(),
  +  ///       ],
  +  ///     ),
  +  ///   );
     /// }
     /// ```
     ///
  
positive.code:   /// digit "1"; with tabular figures enabled, the "1" digit is more
    /// widely spaced.
    ///
    /// ```dart
    /// class Demo extends StatelessWidget {
    ///   // The Piazzolla font can be downloaded from Google Fonts (https://www.google.com/fonts).
    ///   @override
    ///   Widget build(BuildContext context) {
    ///     return Text(
    ///       'Call 311-555-2368 now!',
    ///       style: TextStyle(
    ///         fontFamily: 'Piazzolla',
    ///         fontFeatures: <FontFeature>[
    ///           FontFeature.tabularFigures(),
    ///         ],
    ///       ),
    ///     );
    ///   }
    /// }
    /// ```
    ///
  
negative.code:   /// locale-awareness. (So does not specifying the locale in the
    /// first place, of course.)
    ///
    /// {@tool sample --template=stateless_widget}
    ///
    /// The Noto Sans CJK font supports the `locl` feature for CJK characters.
    /// In this example, the `localeAware` feature is not explicitly used, as it is
    /// enabled by default. This example instead shows how to set the locale,
    /// thus demonstrating how Noto Sans adapts the glyph shapes to the locale.
    ///
    /// ```dart dartImports
    /// import 'dart:ui';
    /// ```
    ///
    /// ```dart
    /// Widget build(BuildContext context) {
    ///   // The Noto family of fonts can be downloaded from Google Fonts (https://www.google.com/fonts).
    ///   return const Text(
    ///     '次 化 刃 直 入 令',
    ///     locale: const Locale('zh', 'CN'), // or Locale('ja'), Locale('ko'), Locale('zh', 'TW'), etc
    ///     style: TextStyle(
    ///       fontFamily: 'Noto Sans',
    ///     ),
    ///   );
    /// }
    /// ```
    ///
  