I recently remembered that ActiveSupport adds an exclude? method to Array and String. Before that, I was just using !foo.include?.

I would like to suggest a new cop that detects usage of !foo.include?(bar), and can auto-fix it to: foo.exclude?(bar).

Does that seem like a good idea to anyone else? I really like the exclude? method because it's easier to see the intention. (Similar to unless vs if.)