documentation index page.
* std: `std::condition` has been removed. All I/O errors are now propagated
through the `Result` type. In order to assist with error handling, a
- `try!` macro for unwrapping errors with an early return and an lint for
+ `try!` macro for unwrapping errors with an early return and a lint for
unused results has been added. See #12039 for more information.
* std: The `vec` module has been renamed to `slice`.
* std: A new vector type, `Vec<T>`, has been added in preparation for DST.