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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.
that's java's Junit "special top feature" ( :cough: ): the square brackets are added to chow where the differences are. They aren't inside your output.
The brackets are there to highlight the difference between one string and the other. If you want to check what the input is, print it: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution