Used snake_case for method names with backwards compactibility
luckySevens --> lucky_sevens
Encountered a bug in Ruby MRI 3.0 on Codewars causing Math.cbrt(0.0) to return NaN instead of 0.0. Monkey patched Math.cbrt as a temporary fix to avoid invalidating some of the valid solutions.
Reworked the random tests, previous tests were set up weirdly -- it used Test.random_token() which includes digit characters & " ." to separate sentences. [1]
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.