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### What it does
Checks for matches with two arms where an `if let else` will
usually suffice.
### Why is this bad?
Just readability – `if let` nests less than a `match`.
### Known problems
Personal style preferences may differ.
### Example
Using `match`:
```
match x {
Some(ref foo) => bar(foo),
_ => bar(&other_ref),
}
```
Using `if let` with `else`:
```
if let Some(ref foo) = x {
bar(foo);
} else {
bar(&other_ref);
}
```
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