5162e39bff
Document `EarlyBinder::subst_identity` and `skip_binder` Finishing implementing #105779 will change several commonly used queries to return `EarlyBinder` by default. This PR adds documentation for two of the methods used to access data inside the `EarlyBinder`. I tried to summarize some of the [discussion from the issue](https://github.com/rust-lang/rust/issues/105779#issuecomment-1375512647) in writing this. r? `@lcnr`
For more information about how rustc works, see the rustc dev guide.