Just reporting two simple typos in the description:

"...with the change seporated by single spaces...values of the string will be desending..."

should spell "separated" and "descending"

Thank you for the kata!

I wonder if this test should be commented by default and labeled as optional?

Compliance to this particular test is not required to pass the kata.

Having the same code fail the supplied test cases but succeed the kata's test cases can be confusing/frustrating for beginners.