Example needs to be updated

[sarbbottam]

Example needs to be updated.

instead of

diff.run(function (passed) {
    console.log(passed ? 'Passed' : 'Failed');
});

It should be

diff.run(function (error) {
    console.log(error ? 'Failed' : 'Passed');
});

As per the below mentioned code:
#L317 fn(undefined, result);
#L321 fn(undefined, result);

[marcelerz]

I fixed it. Thank you!