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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.
The tests aren't broken at all.
Or you're confusing the logs, they appear above the test result (and just in case print the input beside a string) or you didn't get the instructions: the order matters, not only the count.
Which language?
include the respective library for your language
You mean, it isn't in the sample tests, the final tests have two tests with a similar string. That's normal, sample tests are just that.