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### What it does
Checks for using `fold` when a more succinct alternative exists.
Specifically, this checks for `fold`s which could be replaced by `any`, `all`,
`sum` or `product`.
### Why is this bad?
Readability.
### Example
```
(0..3).fold(false, |acc, x| acc || x > 2);
```
Use instead:
```
(0..3).any(|x| x > 2);
```
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