[docs] [issue36198] Misleading in library/sets document

New submission from Han <phoenix.seek@gmail.com>: Doc/library/sets.rst said operation s.update(t)'s result is "return set s with elements added from t". But update()'s return value is None. I think change it to "set s with elements added from t" would be better. So are operations intersection_update(), difference_update(), and symmetric_difference_update(). ---------- assignee: docs@python components: Documentation messages: 337192 nosy: DeadmanWalking, docs@python priority: normal severity: normal status: open title: Misleading in library/sets document versions: Python 2.7 _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue36198> _______________________________________