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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 don't understand the question:
There is nothing significant about spaces. It's just another key.
You can log the input to see what test each test is using.
And you can see the expected results.
It's not enough?