class RuboCop::Cop::Style::MultilineMemoization

def on_or_asgn(node)
  _lhs, rhs = *node
  return unless bad_rhs?(rhs)
  add_offense(node.source_range) do |corrector|
    if style == :keyword
      keyword_autocorrect(rhs, corrector)
    else
      corrector.replace(rhs.loc.begin, '(')
      corrector.replace(rhs.loc.end, ')')
    end
  end
end