| strange, I think default rubocop setting is actually to add spaces around = in default values in functions. https://www.rubydoc.info/gems/rubocop/RuboCop/Cop/Layout/Spa... this is an override in your project's .rubocop.yml For me it's a bit opposite, I use and appreciate rubocop for simple formatting, not all of the rules but some of them, where autocorrect works. Recently I reformatted a big old project which was written by pretty sloppy developers who didn't care about whitespace, and it's just easier to work with now. But I truly hate when rubocop tries to be smart about method calls, amount of lines in methods and amount methods or some other "code smell" metric. yes, the tool allows to check for it, but it's not THAT smart. I have reasons. I'd happy to explain those reasons on code review to a human, but I'm not that happy to appease a dumb tool. So, please do it as rails does, use bare minimals, something like https://github.com/rails/rubocop-rails-omakase and ask other developers to stay away from .rubocop.yml |