new_contents: #!/usr/bin/env python3
  
  """
  Find and display long lines in an ebook text file.
  """
  
  # Lines should not be longer than this
  MAX_LEN = 72
  
  import sys
  
  if len(sys.argv) < 2:
      sys.exit("Missing argument: filename")
  
  lineno = 0
  
  with open(sys.argv[1], "r") as f:
      for line in f:
          lineno += 1
          line = line.rstrip()
          linelen = len(line)
          if linelen > MAX_LEN:
              print(f"{lineno} ({linelen}): {line}")
  
subject: add long_lines script