R1:f1dc56a68778

Muck around with Diviner method documentation display

Summary:
Ref T988. Not sure about this, feel free to push back or tweak it or whatever, but I want to reduce the amount of meta-text in the method documentation. Primarily this:

- Shortens "From parent implementation in ClassName:" to "ClassName".
- Tries to tweak the styles a bit so that it's relatively obvious what that means (hopefully?).
- Fixes an issue with tasks where some methods could be ignored.

Test Plan: {F57565}

Reviewers: chad…