Switched from os.devnull to devnull within relax_io.open_write_file().
This is as proposed by Edward d'Auvergne in a post at: https://mail.gna.org/public/relax-devel/2008-07/msg00021.html (Message ID: 7f080ed10807061152i2a101224p5c5d710d6a92ee@...)
Authored by: semor 2008-07-07
Parent: [r6813]
Child: [r6815]
