### What it does
Checks for calls of `unwrap[_err]()` that cannot fail.

### Why is this bad?
Using `if let` or `match` is more idiomatic.

### Example
```
if option.is_some() {
    do_something_with(option.unwrap())
}
```

Could be written:

```
if let Some(value) = option {
    do_something_with(value)
}
```