Minor fixes to maniphest feed/notification

Summary:
Added `renderNotificationView()` abstract function to `PhabricatorFeedStory` base class.
Fixed duplicate line in `PhabricatorFeedStoryManiphest` class.
Fixed spacing/formatting in `ManiphestTransactionEditor`.

Test Plan: No functional changes

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: allenjohnashton, ddfisher, aran, Korvin

Differential Revision: https://secure.phabricator.com/D2698

src/applications/feed/story/PhabricatorFeedStory.php

@@ -28,6 +28,7 @@ abstract class PhabricatorFeedStory {
   }
 
   abstract public function renderView();
+  abstract public function renderNotificationView();
 
   public function getRequiredHandlePHIDs() {
     return array();

src/applications/feed/story/PhabricatorFeedStoryManiphest.php

@@ -70,7 +70,6 @@ final class PhabricatorFeedStoryManiphest
 
     $view = new PhabricatorNotificationStoryView();
 
-    $view->setEpoch($data->getEpoch());
     $view->setTitle($this->getLineForData($data));
     $view->setEpoch($data->getEpoch());
     $view->setViewed($this->getHasViewed());

src/applications/maniphest/editor/ManiphestTransactionEditor.php

@@ -369,9 +369,7 @@ final class ManiphestTransactionEditor {
             array(
               $author_phid,
               $owner_phid,
-              $actor_phid
-                  )
-                       ),
+              $actor_phid)),
           $task->getCCPHIDs()))
       ->publish();
   }