[Python-3000] Four new failing tests

["Martin v. Löwis"]

> test_csv: one error
> ======================================================================
> ERROR: test_char_write (__main__.TestArrayWrites)
> ----------------------------------------------------------------------
> Traceback (most recent call last):
>   File "Lib/test/test_csv.py", line 648, in test_char_write
>     a = array.array('u', string.letters)
> ValueError: string length not a multiple of item size

Please try again. gdbm wasn't using bytes properly.

Regards,
Martin