Missing parameter in Multiple Parameter List code example?

in `essential-scala/src/pages/sequencing/working-with-data.md`, where `fold` is rewritten with multiple parameters:
```
def fold[B](end: B)(pair: (A, B) => B): B =
  this match {
    case End() => end
    case Pair(hd, tl) => pair(hd, tl.fold(end, pair))
  }
```

Should the parameters of `tl.fold(end, pair)` be split into `tl.fold(end)(pair)` ?