shuffle(tree)

Returns a new tree with the original tree keys randomly shuffled.

$ ori greetings.yaml
Alice: Hello, Alice.
Bob: Hello, Bob.
Carol: Hello, Carol.
$ ori shuffle greetings.yaml
Carol: Hello, Carol.
Alice: Hello, Alice.
Bob: Hello, Bob.
$ ori shuffle greetings.yaml
Carol: Hello, Carol.
Bob: Hello, Bob.
Alice: Hello, Alice.