old_contents: import sys
  from shlex import split
  
  if sys.hexversion >= 0x030300F0:
      from shlex import quote
  else:
      from pipes import quote
  
  
new_contents: import sys
  from shlex import split
  
  if sys.hexversion >= 0x030300F0:
      from shlex import quote
  else:
      from pipes import quote
  
  # TODO: Provide a way for split() to note that shell characters (like | or &&)
  # shouldn't be quoted by quote().
  
subject: Add a comment about an issue with shell.split()