class RuboCop::Cop::Performance::StringReplacement

def replace_method(node, first, second, first_param, replacement)
  lambda do |corrector|
    corrector.replace(node.loc.selector, replacement)
    unless first_param.str_type?
      corrector.replace(first_param.source_range,
                        to_string_literal(first))
    end
    if second.empty? && first.length == 1
      remove_second_param(corrector, node, first_param)
    end
  end
end