Update DivinerAtomController for a long-ago change to the docblock parser API

Summary: Ref T13505. See that task for discussion.

Test Plan: Ran `diviner generate` locally, found a page fataling on this `strlen()`, applied patch, got a sketchy but not-broken page.

Maniphest Tasks: T13505

Differential Revision: https://secure.phabricator.com/D21061

src/applications/diviner/controller/DivinerAtomController.php

@@ -435,9 +435,7 @@ final class DivinerAtomController extends DivinerController {
     $task_specs = array();
 
     $tasks = $symbol->getAtom()->getDocblockMetaValue('task');
-    if (strlen($tasks)) {
-      $tasks = phutil_split_lines($tasks, $retain_endings = false);
-
+    if ($tasks) {
       foreach ($tasks as $task) {
         list($name, $title) = explode(' ', $task, 2);
         $name = trim($name);