commit 785db2185534d1535baef6b61268f97ed267db52
Author: Lee Rowlands <lee.rowlands@previousnext.com.au>
Date:   Mon Mar 11 18:47:51 2013 +1000

    patch 2

diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 0edb028..957f3c2 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -2286,6 +2286,22 @@ function theme_mark($variables) {
 }
 
 /**
+ * Preprocess variables for theme_mark().
+ *
+ * @param array $variables
+ *   An associative array containing:
+ *   - type: Number representing the marker type to display. See MARK_NEW,
+ *     MARK_UPDATED, MARK_READ.
+ */
+function template_preprocess_mark(&$variables) {
+  global $user;
+  $variables['logged_in'] = FALSE;
+  if ($user->uid) {
+    $variables['logged_in'] = TRUE;
+  }
+}
+
+/**
  * Preprocesses variables for theme_item_list().
  *
  * @param array $variables
diff --git a/core/modules/system/templates/mark.html.twig b/core/modules/system/templates/mark.html.twig
new file mode 100644
index 0000000..6f44c36
--- /dev/null
+++ b/core/modules/system/templates/mark.html.twig
@@ -0,0 +1,22 @@
+{#
+/**
+ * @file
+ * Default theme implementation for a marker for new or updated content.
+ *
+ * Available variables:
+ * - type: Number representing the marker type to display. See MARK_NEW,
+ *    MARK_UPDATED, MARK_READ.
+ * - logged_in: TRUE if the user is logged in, else FALSE.
+ *
+ * @see template_preprocess_mark()
+ *
+ * @ingroup themeable
+ */
+#}
+{% if logged_in %}
+  {% if type == MARK_NEW %}
+    <span class="marker">{{ 'new' | t }}</span>
+  {% elseif type == MARK_UPDATED %}
+    <span class="marker">{{ 'updated' | t }}</span>
+  {% endif %}
+{% endif %}

commit 79c0f9e076a939cfe1d0de250f6bb4466f9903b9
Author: Lee Rowlands <lee.rowlands@previousnext.com.au>
Date:   Tue Mar 12 18:53:37 2013 +1000

    Failing tests

diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 957f3c2..9bd4761 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -3199,6 +3199,7 @@ function drupal_common_theme() {
     ),
     'mark' => array(
       'variables' => array('type' => MARK_NEW),
+      'template' => 'mark'
     ),
     'item_list' => array(
       'variables' => array('items' => array(), 'title' => '', 'type' => 'ul', 'attributes' => array()),