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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.
They come from
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;)It's a bit confusing here because Java's test framework adds square brackets to emphasize the parts of your output that are different from the expected result, and your output contains brackets squares, while it should not.