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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.
Although this is an old comment I will respond for any future coders.
Take care to notice that there are two spaces (" ") in the test case and that is the reason the test should fail. Not because of the "Aa"
typo. I changed that, thx.