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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.
This has been fixed
Thank you very much, now that I can try and fix. I'll be amending my post to spoiler in the meantime.
Actually, the assertions have the parameters in the wrong order, so you need to read "Expected x, but was y" the other way around.
This comment is hidden because it contains spoiler information about the solution
This comment is hidden because it contains spoiler information about the solution
I can only imagine the reason being the way Java is converting the hyphen char to an int. If that's assuming a value of -1 for the -, it would be adding a 1 to the beginning of your returned string.