old_contents: import re
  
  
  # A regular expression is a string like what you see below between the quote
  # marks, and the ``re`` module interprets it as a pattern. Each regular
  # expression describes a small program that takes another string as input and
  # returns information about that string. See
  # http://docs.python.org/library/re.html. The ``re`` module provides the
  # ``compile`` function, which prepares regex patterns for use in searching input
  # strings.
  #
  # We put an ``r`` before the string so that Python doesn't interpret the
  # backslashes before the ``re`` module gets to see them. (E.g., ``\n`` means a
  # newline character, so ``\n`` is a single character, not two as they appear in
  # the source code.)
  #
  # The Unicode flag lets us handle words with accented characters.
  FIRST_LAST = re.compile(r"(\w*)\s+((?:\w|\s|['-]){2,})", flags=re.UNICODE)
  
  
  def split_name(name):
  	'''Return ("First", "Last") tuple from a string like "First Last".
  
  	``name`` is a string. This function returns a tuple of strings. When a
  	non-matching string is encoutered, we return ``None``.
  	'''
  	match = FIRST_LAST.search(name)
  	return None if match is None else (match.group(1), match.group(2))
  
new_contents: import re
  
  
  # A regular expression is a string like what you see below between the quote
  # marks, and the ``re`` module interprets it as a pattern. Each regular
  # expression describes a small program that takes another string as input and
  # returns information about that string. See
  # http://docs.python.org/library/re.html. The ``re`` module provides the
  # ``compile`` function, which prepares regex patterns for use in searching input
  # strings.
  #
  # We put an ``r`` before the string so that Python doesn't interpret the
  # backslashes before the ``re`` module gets to see them. (E.g., ``\n`` means a
  # newline character, so ``\n`` is a single character, not two as they appear in
  # the source code.)
  #
  # The Unicode flag lets us handle words with accented characters.
  FIRST_LAST = re.compile(r"(\w*)\s+((?:\w|\s|['-]){2,})", flags=re.UNICODE)
  
  
  def split_name(name):
  	'''Return ("First", "Last") tuple from a string like "First Last".
  
  	``name`` is a string. This function returns a tuple of strings. When a
  	non-matching string is encoutered, we return ``None``.
  	'''
  	match = FIRST_LAST.search(name)
  	if match is None:
  		return None
  	return match.group(1), match.group(2)
  
subject: Use PEP8 style for conditionals