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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.
5 - 1,99 = 3,01 and since 3,01 > 3 you are not inside the margin.
@Roncev I just tested out the JavaScript version and the test cases are working correctly. Can you confirm which version of the kata you're running and that you don't have the error message reversed?