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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.
No, I agree. It suggests that the return operator is a function, particularly given the absence of a space between the two. It's also redundant as a grouping symbol, since the expression that it "groups" is already self-grouping.
Why not?
Excactly. This comment should be permanently added into this solution.