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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.
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it is pass-by-value since the & was removed. So the input parameters are in fact copies. The code is fuly eqivalent to the function taking const& and then making explicit copies.
I don't think changing the function signature is a good idea. Parameters are modified inside the function
and a user will get a trash instead of original strings.
Maybe parameters were const on purpose...
I removed also the
&to take a copy of the inputs. So from the callers perspective the signature is effectively the same.