old_contents: class Constants:
      APP_NAME = "EVOLUTION_CHAMBER"
      COMPARISONS_PER_GENERATION = 50
      POPULATION_SIZE = 15
      KILL_SIZE = 8
  
new_contents: class Constants:
      APP_NAME = "EVOLUTION_CHAMBER"
      COMPARISONS_PER_GENERATION = 100
      POPULATION_SIZE = 20
      KILL_SIZE = 10
  
subject: Change constants