class RuboCop::Cop::Performance::Squeeze

def on_send(node)
  squeeze_candidate?(node) do |receiver, bad_method, regexp_str, replace_str|
    regexp_str = regexp_str[0..-2] # delete '+' from the end
    regexp_str = interpret_string_escapes(regexp_str)
    return unless replace_str == regexp_str
    good_method = PREFERRED_METHODS[bad_method]
    message = format(MSG, current: bad_method, prefer: good_method)
    add_offense(node.loc.selector, message: message) do |corrector|
      string_literal = to_string_literal(replace_str)
      new_code = "#{receiver.source}#{node.loc.dot.source}#{good_method}(#{string_literal})"
      corrector.replace(node, new_code)
    end
  end
end