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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.
Recent changes in the codewars platform broke the original version of this kata. I have updated the example test fixture so that the tools are available. In any case, submitting your solution always worked; it was only the "run tests" that was broken.
I'll see if I can work that in.
It is definitly not necessary. It was left over from experimenting. I only saw it after submitting the solztion and I was not able to edit it afterwards.
It's not necessary...