def format_headers
      @headers.stringify_keys.each_with_object({}) do |key_with_value, headers|
        headers[format_key(key_with_value.first)] = key_with_value.last
      end
    end
def format_headers
      @headers.stringify_keys.each_with_object({}) do |key_with_value, headers|
        headers[format_key(key_with_value.first)] = key_with_value.last
      end
    end
Formats all keys in Word-Word format