Add an option to enforce parens or not in zero-arity defs #673
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@rrrene I'm not sure this aligns with the direction you see for Credo. In the Elixir formatter, we went with a clear decision: the formatter is as opinionated as possible, and configuration is the enemy. However Credo seems to be used as a linter more geared towards consistency: for example, look at all the consistency checks which don't enforce a specific style bur rather just a consistent one. For this reason, I think that it might be nice to be able to configure some checks like the one in this PR. I didn't go with any other checks as I want to test the waters first, and get the discussion started on this. Let me know your thoughts! :)