e7fdba84e2
`EarlyBinder::new` -> `EarlyBinder::bind` for consistency with `Binder::bind`. it may make sense to also add `EarlyBinder::dummy` in places where we know that no parameters exist, but I left that out of this PR. r? `@jackh726` `@kylematsuda`
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.