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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.
So basically the call of list-function in the second print statement is what messes up the code functionality.
Can someone explain why? Does it end the function somehow and if so: why?