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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.
Remember that the result will be in lexicographic order
Move require out of the method
It is not an issue but a problem of your code.
I get this error in Ruby:
Expected: ["ion", "ve"], instead got: ["ve", "ion"]
On my machine too, the last test fails. Even I want to know the scenario in which it fails :(