Fix some HTML problems

Summary: I'm too lazy to attaching them for diffs where they were introduced.

Test Plan:
/
/D1, wrote comment with code snippet
DarkConsole
commit detail, wrote comment
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Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2432

Differential Revision: https://secure.phabricator.com/D4911

src/applications/diviner/controller/DivinerListController.php

@@ -50,10 +50,7 @@ final class DivinerListController extends PhabricatorController {
         $flavor);
     }
 
-    $out =
-      '<div class="aphront-directory-list">'.
-        implode("\n", $out).
-      '</div>';
+    $out = phutil_tag('div', array('class' => 'aphront-directory-list'), $out);
 
     return $this->buildApplicationPage(
       $out,