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### What it does
Checks whether a for loop has a single element.
### Why is this bad?
There is no reason to have a loop of a
single element.
### Example
```
let item1 = 2;
for item in &[item1] {
println!("{}", item);
}
```
Use instead:
```
let item1 = 2;
let item = &item1;
println!("{}", item);
```
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