How to fix the `textScaleFactor` in Flutter

fix_textScaleFactor.dart

MaterialApp(
  builder: (BuildContext context, Widget child){
    final MediaQueryData data = MediaQuery.of(context);
    return MediaQuery(
      data: data.copyWith(
        textScaleFactor: 1.0, // hard-coding the accessibility factor
      ),
      child: child,
    );
  },
)

This comes directly from Flutter Interact '19.