Message2672

As I commented in the bug report this patch leaves "'%(x)s' % {'x':u'xxx'}" case open. Another problem I noticed is following. If the fix is in StringFormatter as I suggest in the report comments this problem will also be removed. 

>>> '%d' % 3
Traceback (innermost last):
  File "<console>", line 1, in ?
TypeError: iteration over non-sequence;

This one is of course something that I would've noticed if I had run all tests in the first place. Must learn to do that...