class RuboCop::Cop::Naming::BinaryOperatorParameterName

def on_def(node)
  op_method_candidate?(node) do |name, arg|
    add_offense(arg, message: format(MSG, opr: name)) do |corrector|
      corrector.replace(arg, 'other')
      node.each_descendant(:lvar, :lvasgn) do |lvar|
        lvar_location = lvar.loc.name
        next unless lvar_location.source == arg.source
        corrector.replace(lvar_location, 'other')
      end
    end
  end
end