# with the notable exception of backslash.
sane_in_payu_title = re.escape(
string.uppercase +
- string.lowercase +
- u'ąćęłńóśźżĄĆĘŁŃÓŚŹŻ' +
+ string.lowercase +
+ u'ąćęłńóśźżĄĆĘŁŃÓŚŹŻ' +
string.digits +
' ' +
"".join(set(string.punctuation) - set('\\'))