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### What it does
Checks for usage of `_.find(_).map(_)` that can be written more simply
as `find_map(_)`.
### Why is this bad?
Redundant code in the `find` and `map` operations is poor style and
less performant.
### Example
```
(0_i32..10)
.find(|n| n.checked_add(1).is_some())
.map(|n| n.checked_add(1).unwrap());
```
Use instead:
```
(0_i32..10).find_map(|n| n.checked_add(1));
```
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