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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.
I guess we'll never know
Yeah, you are right. People are just deciding to be extra and do multiple lines of code for no reason. Maybe they want to practice some other techniques?