handle_labels():  Fix problem for document fragments containing more 	than one "root" that prevented all the <label id=...> items 	from being promoted to id attributes on the enclosing chapter/ 	section/... properly.
handle_labels():  Fix problem for document fragments containing more
	than one "root" that prevented all the <label id=...> items
	from being promoted to id attributes on the enclosing chapter/
	section/... properly.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator