- Also modified the property name from `SourceLocation` => `SourceRange` to avoid ambiguity.
- Updated IR baselines
- Updated IR baseline infrastructure to conditionally render the document location.
#884
- Added conditional attribute test.
- Reacted to Html optimization pass in tests.
- Removed directive IR bits since they'll be handled by the extensible directive system.
#844
This is an API skeleton for the IR data model that we'll be using as a
spiritual continuation of the 'chunks' API. Currently missing a lot of
detail which will be filled in as needed.