every?

    function
    boot.janet on line 1717, column 1

    (every? x)

    Evaluates to the last element of `x` if all preceding elements are 
    truthy, true if `x` is empty, or otherwise to the first falsey 
    element.

    `x` can be a bytes, indexed. dictionary, fiber, or abstract type 
    with suitable `get` and `next` methods.