Weird output with JS Set

### Chrome Dev Tools:
```
let a = [ 10, 20, 20, 30, 40, 50, 50 ];
undefined

let s = new Set(a)
undefined

s
Set(5) {10, 20, 30, 40, 50}

[...s]
(5) [10, 20, 30, 40, 50]
```

### RunJS (using the same code as above):
```
[...s]

[ '
', '
', '
', '[', '.', '.', '.', 's', ']', ';' ]
```
___
{
  "version": "3.0.3",
  "platform": "darwin",
  "arch": "arm64",
  "activated": true,
  "logs": []
}