* feat: add analyzer for AfterAutoHandleStateEvent
* fix: correct TestOf attribute
Oopsieeeee.
Also weird newline plus unused import.
* Rerun content tests
* refactor: use ==, not .Contains
* feat: make AttributeHelper.HasAttribute looser
* refactor: use AttributeHelper.HasAttribute
* perf: cache AutoGenStateAttribute's type
* refactor: more pattern matching
ElementAtOrDefault with constant arg is bad; just use positional
matching.
