Brackets missing in Example-1.5 #8

I believe it should have been
return { x: (x - bbox.left) * (canvas.width / bbox.width),
y: (y - bbox.top) * (canvas.height / bbox.height)
};
instead of(missing brackets)
return { x: x - bbox.left * (canvas.width / bbox.width),
y: y - bbox.top * (canvas.height / bbox.height)
};

in windowToCanvas method of example.js in example-1.5.

Upendra