rust private

Always show end line of multiline annotations ```rust error[E0046]: not all trait items implemented, missing: `Item` --> $DIR/issue-23729.rs:20:9 | 20 | impl Iterator for Recurrence { | _________^ starting here... 21 | | //~^ ERROR E0046 22 | | //~| NOTE missing `Item` in implementation 23 | | //~| NOTE `Item` from trait: `type Item;` ... | 36 | | } 37 | | } | |_________^ ...ending here: missing `Item` in implementation | = note: `Item` from trait: `type Item;` ``` instead of ```rust error[E0046]: not all trait items implemented, missing: `Item` --> $DIR/issue-23729.rs:20:9 | 20 | impl Iterator for Recurrence { | ^ missing `Item` in implementation | = note: `Item` from trait: `type Item;` ```