old_contents: """Define the scalar units used by vehicle measurements."""
  from __future__ import absolute_import
  
  import sys
  from units import unit, scaled_unit, named_unit
  import units.predefined
  
  units.predefined.define_units()
  
  
  Percentage = unit('%')
  Meter = unit('m')
  Kilometer = scaled_unit('m', 'km', 1000)
  Hour = unit('h')
  KilometersPerHour = unit('km') / unit('h')
  RotationsPerMinute = unit('rotations') / unit('m')
  Litre = unit('L')
  Degree = unit('deg')
  NewtonMeter = named_unit("Nm", ["N", "m"], [])
  MetersPerSecondSquared = unit('m') / (pow(unit('s'), 2))
  Undefined = unit('undef')
  
new_contents: """Define the scalar units used by vehicle measurements."""
  from __future__ import absolute_import
  
  import sys
  from units import unit, scaled_unit, named_unit
  import units.predefined
  
  units.predefined.define_units()
  
  
  Percentage = unit('%')
  Meter = unit('m')
  Kilometer = scaled_unit('km', 'm', 1000)
  Hour = unit('h')
  KilometersPerHour = unit('km') / unit('h')
  RotationsPerMinute = unit('rotations') / unit('m')
  Litre = unit('L')
  Degree = unit('deg')
  NewtonMeter = named_unit("Nm", ["N", "m"], [])
  MetersPerSecondSquared = unit('m') / (pow(unit('s'), 2))
  Undefined = unit('undef')
  
subject: fix scaled_unit inputs to update Kilometer unit.