transitioning to Iterator #7110
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replaced with `xs.mut_iter().enumerate()`
replaced with mutable implementations of Iterator
copies can just be done explicitly: `xs.transform(|x|x.clone())`
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…h_type_annotations, r=flip1995 needless_collect: Lint cases with type annotations for indirect usage and recognize `BinaryHeap` fixes rust-lang#7110 changelog: needless_collect: Lint cases with type annotations for indirect usage and recognize `BinaryHeap`.
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