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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Your error should be: "Input [Foo, Bar, Baz] expected: but was: ". This looks like a minor bug in codewars.com forgetting to escape html characters.
You can view the real error by using your html debugger.
I made the exercise expect output of that type because the behavior of Stream.limit(long maxSize) is to set an upper limit on the stream, it does not affect streams with fewer elements than maxSize.