class RuboCop::Cop::Performance::StartWith

def autocorrect(node)
  redundant_regex?(node) do |receiver, regex_str|
    receiver, regex_str = regex_str, receiver if receiver.is_a?(String)
    regex_str = regex_str[2..-1] # drop \A anchor
    regex_str = interpret_string_escapes(regex_str)
    lambda do |corrector|
      new_source = receiver.source + '.start_with?(' +
                   to_string_literal(regex_str) + ')'
      corrector.replace(node.source_range, new_source)
    end
  end
end