def visit_for(self, node):
        """return an astroid.For node as string"""
        fors = "for %s in %s:\n%s" % (
            node.target.accept(self),
            node.iter.accept(self),
            self._stmt_list(node.body),
        )
        if node.orelse:
            fors = "%s\nelse:\n%s" % (fors, self._stmt_list(node.orelse))
        return fors
return an astroid.For node as string