This rule was added in rubocop-rails 2.33.
At first, I wasn't very fond of this rule. It made the code less
readable even if it improved performace in some cases.
Then I realized that in the `Admin::MachineLearning::SettingComponent`
we were using `find_by` when we should be using `find_by!` instead, and
we detected that thanks to this rule.
So, only for that reason, I'm adding this rule, but I'm fine if we
remove it.
FIxed issue in last commit: supports controller were not correctly
filling the holes without data.
Fixed duplication in supports and successful supports controller using a
concer.
Successfull supports controller will fill the holes without data in the
same way that supports controller does.
