Ruby: &[SPACE][identifier] syntax breaks Ruby parsing

CodeQL's Ruby breaks parsing breaks for the following code:

```ruby
sorted_array = array.sort(& custom_sorts[params[:sortby]])
```

I understand that the following *should* be how this is written, but sometimes people put weird syntax in and it shouldn't break a whole file being parsed:

```ruby
sorted_array = array.sort(&custom_sorts[params[:sortby]])
```
