### What it does
Checks for usages of `_.unwrap_or_else(Default::default)` on `Option` and
`Result` values.

### Why is this bad?
Readability, these can be written as `_.unwrap_or_default`, which is
simpler and more concise.

### Examples
```
x.unwrap_or_else(Default::default);
x.unwrap_or_else(u32::default);
```

Use instead:
```
x.unwrap_or_default();
```