Chatper 6: LinkedList COW optimization of sharing nodes also works for `pop()` operations

📚 Official Books Data Structures & Algorithms in Swift
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The book mentions the following at the very end of Chapter 6:

The unidirectional nature of the linked list means that head-first insertions can ignore the “COW tax”!

However, I believe this also applies to pop() operations as I’ve tested it by removing the copyNodes() from the pop() function and this was the result:

example(of: "non COW pop") {
    var list = LinkedList<Int>()
    list.push(3)
    list.push(2)
    list.push(1)
    var list2 = list
    list.pop()

    print(list)
    print(list2)
}

// Console
---Example of non COW pop---
[ 2 ] --> [ 3 ] 
[ 1 ] --> [ 2 ] --> [ 3 ]