Smoke runner should display more than one failed assertion at a time

currently we only show _one_ difference:

<img width="811" alt="image" src="https://user-images.githubusercontent.com/4071474/173682986-10e6eb4b-4ff7-4595-b33b-0e38b0d35c77.png">


but that can be annoying when multiple are failing. would be nice to determine/list all of them