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Add lint recommending using `std::iter::once` and `std::iter::empty` ``` changelog: [`iter_once`]: add new lint changelog: [`iter_empty`]: add new lint ``` fixes #9186 - \[ ] Followed [lint naming conventions][lint_naming] - \[x] Added passing UI tests (including committed `.stderr` file) - \[x] `cargo test` passes locally - \[x] Executed `cargo dev update_lints` - \[x] Added lint documentation - \[x] Run `cargo dev fmt` [lint_naming]: https://rust-lang.github.io/rfcs/0344-conventions-galore.html#lints The lint doesn't really follow the naming conventions. I don't have any better idea so I'm open to suggestions. |
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