Redundant self cop incorrect when arguments mask methods

[jonah-williams]

Given a method of the form:

def set_finalized(finalized = true)
  if self.finalized != finalized
    self.finalized = finalized
    save
  end
end

RedundantSelf identifies a violation and "corrects" the method to be:

def set_finalized(finalized = true)
  if finalized != finalized
    self.finalized = finalized
    save
  end
end

This alters the behavior of the method and introduces incorrect behavior.

[bbatsov]

Thanks for reporting this. I'll have it fixed right away.