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### What it does
Checks for unnecessary `ok()` in `while let`.
### Why is this bad?
Calling `ok()` in `while let` is unnecessary, instead match
on `Ok(pat)`
### Example
```
while let Some(value) = iter.next().ok() {
vec.push(value)
}
if let Some(value) = iter.next().ok() {
vec.push(value)
}
```
Use instead:
```
while let Ok(value) = iter.next() {
vec.push(value)
}
if let Ok(value) = iter.next() {
vec.push(value)
}
```
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