class RuboCop::Cop::Style::PercentLiteralDelimiters

def autocorrect(node)
  type = type(node)
  opening_delimiter, closing_delimiter = preferred_delimiters_for(type)
  lambda do |corrector|
    corrector.replace(node.loc.begin, "#{type}#{opening_delimiter}")
    corrector.replace(node.loc.end, closing_delimiter)
  end
end