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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.
the description now mentions this edge case
Not an issue. The test is correct.
This comment is hidden because it contains spoiler information about the solution
You can see what is wanted by simple checking the tests at the bottom, or printing the inputs and read assertion messages.
While I agree that kata description isn't complete (it doesn't mention joining by spaces), it can't be taken down, it's already approved. What you wrote doesn't really count as a valid issue :/ You have touched upon the issue that output isn't specified, but it's buried within your message, so I'll re-raise it.
fixed
No, once it has a reply, you can't delete the first post of the thread.