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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.
In the PHP version the last test (visible) test case has an error:
As you can see it expects the array keys in a different order than they were given, which is different from what the first two test cases suggest.
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I think it would be a good idea to add two more test-cases to the default ones. Namely the Cheshire cat and the one where 'shire' is surrounded by non-alphabetical characters.