cStringIO does not support being an "I" and "O" at the same time
cStringIO does not support being an "I" and "O" at the same time

Signed-off-by: Chris Lamb <711c73f64afdce07b7e38039a96d2224209e9a6c@chris-lamb.co.uk>

lamby/debian-devel-changes-bot,lamby/debian-devel-changes-bot,xtaran/debian-devel-changes-bot,xtaran/debian-devel-changes-bot,sebastinas/debian-devel-changes-bot,lamby/debian-devel-changes-bot