Looking at the csv.rst file I see this statement early in the py3k
docs:
If *csvfile* is a file object, it should be opened with ``newline=''``.
There is also a footnote about the consequences of leaving it out:
.. [#] If ``newline=''`` is not specified, newlines embedded inside quoted fields
will not be interpreted correctly. It should always be safe to specify
``newline=''``, since the csv module does its own universal newline handling
on input.
Finally, the examples all use "newline=''". I see two things to change
in the docs:
* Replace "should" with "must" in the first quoted sentence above.
* Add that sentence to the documentation for the csv.writer()
function.