old_contents: import argparse
  
  parser = argparse.ArgumentParser(
  	description="craigslist car finder", parents=())
  parser.add_argument("-b", "--brand", default='honda',
                     help='car brand')
  parser.add_argument("-m", "--model", default='civic',
                     help='car model')
  parser.add_argument("--minimum_price", default='civic',
                     help='car model')
new_contents: import argparse
  
  parser = argparse.ArgumentParser(
  	description="craigslist car finder", parents=())
  parser.add_argument("-b", "--brand", default='honda',
                     help='car brand')
  parser.add_argument("-m", "--model", default='civic',
                     help='car model')
  parser.add_argument("--minimum_price", default='4000',
                     help='car model')
subject: Correct default value