diff --git a/core/lib/Drupal/Core/Template/TwigExtension.php b/core/lib/Drupal/Core/Template/TwigExtension.php
index 99c573a..affc38d 100644
--- a/core/lib/Drupal/Core/Template/TwigExtension.php
+++ b/core/lib/Drupal/Core/Template/TwigExtension.php
@@ -475,11 +475,12 @@ public function escapeFilter(\Twig_Environment $env, $arg, $strategy = 'html', $
   /**
    * Wrapper around render() for twig printed output.
    *
-   * When $arg is passed as an object which does not implement __toString(),
-   * RenderableInterface or toString(). Other objects are casted to string.
-   * If it already implements __toString(), it will throw an exception.
-   * However in the case that the object is an instance of a Twig_Markup object
-   * it is returned directly to support auto escaping.
+   * If an object is passed which does not implement __toString(),
+   * RenderableInterface or toString() method an exception is thrown;
+   * Other objects are casted to string. If it already implements
+   * __toString(), it will throw an exception. However in the case that the
+   * object is an instance of a Twig_Markup object it is returned directly
+   * to support auto escaping.
    *
    * If an array is passed it is rendered via render() and scalar values are
    * returned directly.