Space-padding within expression fails in a variety of ways about kajiki HOT 3 CLOSED

>>> kajiki.XMLTemplate(u'<x y="${1+1 }"/>')().render()
u'<x y="2"/>'
>>> kajiki.XMLTemplate(u'<x y="${ 1+1}"/>')().render()
u'<x y="1+1}"/>'
>>> print(kajiki.XMLTemplate(u'<x a="${ 1+1}"/>').py_text)
class template:
    @kajiki.expose
    def __main__():
        yield u'<x'
        def _kj__175():
            yield 
            yield u'1+1}'
        _kj__175 = self.__kj__.collect(_kj__175())
        for _kj__160 in self.__kj__.render_attrs({u'a':_kj__175}, u'xml'):
            yield _kj__160
        yield u'/>'
template = kajiki.Template(template)