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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.
No real issues, I just think it could use more test-cases
Excercise could be clearer. I was unsure of where to start. more examples would probably be good.