Currently `DifferentialDoorkeeperRevisionFeedStoryPublisher:isStoryAboutObjectCreation` and `DifferentialDoorkeeperRevisionFeedStoryPublisher:isStoryAboutObjectClosure` methods (see https://secure.phabricator.com/diffusion/P/browse/master/src/applications/differential/doorkeeper/DifferentialDoorkeeperRevisionFeedStoryPublisher.php;1df321bf00a172a6fb13852f815a168760585baa$10-23) incorrectly detect new revision status based on story data value, which nobody really populates:
```
lang=php
$story = $this->getFeedStory();
$action = $story->getStoryData()->getValue('action');
```
I think instead we should look at new value of status change transaction like so:
```
lang=php
$story = $this->getFeedStory();
$xaction = $story->getPrimaryTransaction();
if ($xaction->getTransactionType() == DifferentialTransaction::TYPE_ACTION) {
$action = $xaction->getNewValue();
}
```
Currently only Asana feed story publisher uses these methods.