Next, a demonstration of whitespace normalization.
>>> import sys
>>> [1, 2, 3, 4, 5, 6, 7, 8, 9]
... # doctest: +NORMALIZE_WHITESPACE
[1, 2, 3,
4, 5, 6,
7, 8, 9]

>>> sys.stdout.write("This text\n contains weird     spacing.")
... # doctest: +NORMALIZE_WHITESPACE
This text contains weird spacing.