commit 0f697bb589cd572a8ef341950962aee2089fbce2
Author: Joel Pittet <joel@pittet.ca>
Date:   Sat Oct 24 13:12:53 2015 -0700

    \Drupal\Core\Template\TwigMarkup

diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 2c4d02e..451b3a3 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -541,7 +541,7 @@ public function renderVar($arg) {
    *   This value is expected to be safe for output and user provided data
    *   should never be used as a glue.
    *
-   * @return TwigMarkup
+   * @return \Drupal\Core\Template\TwigMarkup
    *   The created imploded string, which is now markup.
    */
   public function safeJoin(\Twig_Environment $env, $value, $glue = '') {