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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.
It's difficult to say without seeing your code, but do you get the error locally when running your solution with exactly the same input which causes exceptions on CW?
Read how to use markdown formatting in the link I gave you.
Leave only this test uncommented:
Assert::That(format_duration(1), Equals("1 second"));And change your return line to:
return output + "*";The error message becomes this:
https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution#how-do-i-post-to-a-kata-discourse