Fix an issue where email is overquoted when attaching objects

Summary:
Currently, if you attach a revision to a task and the revision has a title with quotes or angle brackets in it, they are over-escaped in the email.

Instead, don't do that.

Test Plan: Attached `"QUOTES" MATH: 1 < 2` to a task, got a reasonable looking email.

Reviewers: btrahan, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D7186

src/applications/transactions/storage/PhabricatorApplicationTransaction.php

@@ -190,7 +190,7 @@ abstract class PhabricatorApplicationTransaction
     if ($this->renderingTarget == self::TARGET_HTML) {
       return $this->getHandle($phid)->renderLink();
     } else {
-      return hsprintf('%s', $this->getHandle($phid)->getLinkName());
+      return $this->getHandle($phid)->getLinkName();
     }
   }
 
@@ -199,7 +199,11 @@ abstract class PhabricatorApplicationTransaction
     foreach ($phids as $phid) {
       $links[] = $this->renderHandleLink($phid);
     }
-    return phutil_implode_html(', ', $links);
+    if ($this->renderingTarget == self::TARGET_HTML) {
+      return phutil_implode_html(', ', $links);
+    } else {
+      return implode(', ', $links);
+    }
   }
 
   public function renderPolicyName($phid) {