Oh No, I Forgot Stream::iterate!

Java 9 adds a new overload of `Stream.iterate` that accepts a predicate as a middle argument, making it possible to create finite streams without external limiting operations. The signature is `Stream.iterate(seed, predicate, nextFunction)`, which resembles a traditional for-loop. A key gotcha is highlighted: the predicate is evaluated *after* each element is taken from the source, meaning the last element of iterator-like structures (e.g., `Enumeration` or `Stack`) will be missing from the resulting stream.