old_contents: import smbus
  import time
  
  ADDRESS = 4
  CMD_READ_ANALOG = 1
  VOLT12 = 650
  VOLT18 = 978
  
  def map_range(x, in_min, in_max, out_min, out_max):
      out_delta = out_max - out_min
      in_delta = in_max - in_min
  
      return (x - in_min) * out_delta / in_delta + out_min
  
  class Voltage:
      def __init__(self):
          self.bus = smbus.SMBus(1)
  
      def get_data(self):
          voltage_time = time.time();
          voltage_raw = self.bus.read_word_data(ADDRESS, CMD_READ_ANALOG)
          voltage = map_range(voltage_raw, VOLT12, VOLT18, 12, 18)
  
          return [
              (voltage_time, "voltage_raw", voltage_raw),
              (voltage_time, "voltage", voltage)
          ]
  
new_contents: import smbus
  import time
  
  ADDRESS = 4
  CMD_READ_ANALOG = 1
  VOLT12 = 650
  VOLT18 = 978
  
  
  def map_range(x, in_min, in_max, out_min, out_max):
      out_delta = out_max - out_min
      in_delta = in_max - in_min
  
      return (x - in_min) * out_delta / in_delta + out_min
  
  
  class Voltage:
      def __init__(self):
          self.bus = smbus.SMBus(1)
  
      def get_data(self):
          voltage_time = time.time()
          voltage_raw = self.bus.read_word_data(ADDRESS, CMD_READ_ANALOG)
          voltage = map_range(voltage_raw, VOLT12, VOLT18, 12, 18)
  
          return [
              (voltage_time, "voltage_raw", voltage_raw),
              (voltage_time, "voltage", voltage)
          ]
  
subject: Fix some minor formatting issues