The formula for `HessianRegularizer` is not getting properly rendered on docs. The minus sign appears as a bullet point. <img width="890" alt="Screen Shot 2022-09-01 at 12 25 57 PM" src="https://user-images.githubusercontent.com/32904247/187851388-92f9d64c-6602-4ea1-a7e3-ce301a484baf.png">