convert_with_area_code

# File activesupport/lib/active_support/number_helper/number_to_phone_converter.rb, line 22
        def convert_with_area_code(number)
          default_pattern = /(\d{1,3})(\d{3})(\d{4}$)/
          number.gsub!(regexp_pattern(default_pattern),
                       "(\\1) \\2#{delimiter}\\3")
          number
        end