anchor.diff:    final String fontFamily;
     final double fontSize; // in pixels
     final FontWeight fontWeight;
  +  final FontStyle fontStyle;
     final TextAlign textAlign;
     final TextBaseline textBaseline;
     final double height; // multiple of fontSize
  
positive.code:       fontFamily == other.fontFamily &&
        fontSize == other.fontSize &&
        fontWeight == other.fontWeight &&
        textAlign == other.textAlign &&
        textBaseline == other.textBaseline &&
        decoration == other.decoration &&
  
negative.code:       result.add('${prefix}fontSize: $fontSize');
      if (fontWeight != null)
        result.add('${prefix}fontWeight: $fontWeight');
      if (fontStyle != null)
        result.add('${prefix}fontStyle: $fontStyle');
      if (textAlign != null)
        result.add('${prefix}textAlign: $textAlign');
      if (textBaseline != null)
  