anchor.diff:    /// be shifted slightly, or otherwise adjusted, so as to form a more
     /// aethestically pleasing combination with capital letters.
     ///
  -  /// {@tool sample --template=freeform}
  +  /// {@tool sample --template=stateless_widget}
     ///
     /// The Piazzolla font supports the `case` feature. It causes
     /// parentheses, brackets, braces, guillemets, slashes, bullets, and
  
positive.code:   ///
    /// The default behavior varies from font to font.
    ///
    /// {@tool sample --template=freeform}
    ///
    /// The Kufam font supports the `pnum` feature. It causes the digits
    /// to become proportionally-sized, rather than all being the same
  
negative.code:   /// selects the set to use (a positive integer, or 0 to disable the
    /// feature). The default set if none is specified is 1.
    ///
    /// {@tool sample --template=stateless_widget}
    ///
    /// The Gothic A1 font supports several notational variant sets via
    /// the `nalt` feature.
  