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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.
Hey Wissal, 4 years later, here is your answer: because we need to add the last empty character ('\0') so that it doesn't stray, cause overflow and keep overwriting with anything
both Alterra and TylerBlue are correct
a string "Hello" is actually "Hello!\0" even though that character is not visible