Comment 5 for bug 805996

at the same time I suggest to print/display the IBAN in groups of 4 charcaters - users have considerable difficulties to compare unformatted IBAN strings of up to 27characters on screen with IBAN printed on documents. mostly I see them moving the cursor along while they read on document.
not having this is maximum user unfriendlyness.
http://en.wikipedia.org/wiki/International_Bank_Account_Number

see here for a formatter I used in v5, but beeing unable to implement it in v6 yet because I (dur to my limited python knowledge) do not know how to inherit base_iban/base_iban.py
def _format_iban(string):

http://bazaar.launchpad.net/~c2c-austria/openobject-addons/c2c_austria_dev/view/head:/c2c_iban_formatter/iban.py