fix stripEmptyTextNodes for IE (part of #615337)
this does not seem to make the function really work but it does not fail any more
# Instructions here will be read before reading the schema""":organization: Logilab:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses"""# You could create your own groups here, like in :# create_entity('CWGroup', name=u'mygroup')