Comment 2 for bug 1580678

Suppression partition suggests locale is French:
https://github.com/openstack/swift/blob/master/swift/locale/fr/LC_MESSAGES/swift.po#L871

which means we'll log this:
https://github.com/openstack/swift/blob/master/swift/locale/fr/LC_MESSAGES/swift.po#L968

"Succès de Rsync pour %(src)s dans %(dst)s (%(time).03f)"

which could be problematic if one of the format args is unicode:

>>> "Succès de Rsync pour %s" % u'foo'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 4: ordinal not in range(128)