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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.
I agree it needs revision, the capital 'W' in the example output ["CodeWars"] made me think there could be mutiple capital letters in each string of the array which apparently isn't true. In cases of arrays containing multiple strings the only capital letters were the first ones of the strings making this problem easier.