commit f8e4cf67ea6b65a304ea72ec82527557da352aa4
Author: Joel Pittet <joel@pittet.ca>
Date:   Fri Apr 12 19:44:22 2013 -0700

    update_version

diff --git a/core/modules/update/templates/update-version.html.twig b/core/modules/update/templates/update-version.html.twig
new file mode 100644
index 0000000..f3aec6a
--- /dev/null
+++ b/core/modules/update/templates/update-version.html.twig
@@ -0,0 +1,32 @@
+{#
+/**
+ * @file
+ * Default theme implementation for the version display of a project.
+ *
+ * Available variables:
+ *   - version: An array of data about the latest released version, containing:
+ *     - version: The version number.
+ *     - release_link: The URL for the release notes.
+ *     - date: The date of the release.
+ *     - download_link: The URL for the downloadable file.
+ *   - tag: The title of the project.
+ *   - class: A string containing extra classes for the wrapping table.
+ *
+ * @see template_preprocess
+ * @see template_preprocess_update_version
+ *
+ * @ingroup themeable
+ */
+#}
+<table{{ attributes }}>
+  <tr>
+    <td class="version-title">{{ tag }}</td>
+    <td class="version-details">
+      {{ version_link }}
+      <span class="version-date">{{ version_date }}</span>
+    </td>
+    <td class="version-links">
+      {{ version_links }}
+    </td>
+  </tr>
+</table>
diff --git a/core/modules/update/update.module b/core/modules/update/update.module
index 21d317c..e9b8663 100644
--- a/core/modules/update/update.module
+++ b/core/modules/update/update.module
@@ -265,11 +265,10 @@ function update_theme() {
       'variables' => array('data' => NULL),
       // 'template'  => 'update-report',
     ),
-    // @todo convert to #type=>table and remove this theme function.
-    // @see http://drupal.org/node/1938934.
     'update_version' => array(
-      'variables' => array('version' => NULL, 'tag' => NULL, 'class' => array()),
+      'variables' => array('version' => NULL, 'tag' => NULL),
       'file' => 'update.report.inc',
+      'template' => 'update-version',
     ),
     'update_status_label' => array(
       'variables' => array('status' => NULL),
diff --git a/core/modules/update/update.report.inc b/core/modules/update/update.report.inc
index b56e615..6bbd9cd 100644
--- a/core/modules/update/update.report.inc
+++ b/core/modules/update/update.report.inc
@@ -151,32 +151,52 @@ function theme_update_report($variables) {
               ) {
             $version_class[] = 'version-recommended-strong';
           }
-          $versions_inner .= theme('update_version', array('version' => $project['releases'][$project['recommended']], 'tag' => t('Recommended version:'), 'class' => $version_class));
+          $versions_inner .= theme('update_version', array(
+            'version' => $project['releases'][$project['recommended']],
+            'tag' => t('Recommended version:'),
+            'attributes' => array('class' => $version_class),
+          ));
         }
 
         // Now, print any security updates.
         if (!empty($project['security updates'])) {
           $security_class[] = 'version-security';
           foreach ($project['security updates'] as $security_update) {
-            $versions_inner .= theme('update_version', array('version' => $security_update, 'tag' => t('Security update:'), 'class' => $security_class));
+            $versions_inner .= theme('update_version', array(
+              'version' => $security_update,
+              'tag' => t('Security update:'),
+              'attributes' => array('class' => $security_class),
+            ));
           }
         }
       }
 
       if ($project['recommended'] !== $project['latest_version']) {
-        $versions_inner .= theme('update_version', array('version' => $project['releases'][$project['latest_version']], 'tag' => t('Latest version:'), 'class' => array('version-latest')));
+        $versions_inner .= theme('update_version', array(
+          'version' => $project['releases'][$project['latest_version']],
+          'tag' => t('Latest version:'),
+          'attributes' => array('class' => array('version-latest')),
+        ));
       }
       if ($project['install_type'] == 'dev'
           && $project['status'] != UPDATE_CURRENT
           && isset($project['dev_version'])
           && $project['recommended'] !== $project['dev_version']) {
-        $versions_inner .= theme('update_version', array('version' => $project['releases'][$project['dev_version']], 'tag' => t('Development version:'), 'class' => array('version-latest')));
+        $versions_inner .= theme('update_version', array(
+          'version' => $project['releases'][$project['dev_version']],
+          'tag' => t('Development version:'),
+          'attributes' => array('class' => array('version-latest')),
+        ));
       }
     }
 
     if (isset($project['also'])) {
       foreach ($project['also'] as $also) {
-        $versions_inner .= theme('update_version', array('version' => $project['releases'][$also], 'tag' => t('Also available:'), 'class' => array('version-also-available')));
+        $versions_inner .= theme('update_version', array(
+          'version' => $project['releases'][$also],
+          'tag' => t('Also available:'),
+          'attributes' => array('class' => array('version-also-available')),
+        ));
       }
     }
 
@@ -305,7 +325,9 @@ function template_preprocess_update_status_label(&$variables) {
 }
 
 /**
- * Returns HTML for the version display of a project.
+ * Prepare variables for the version display of a project.
+ *
+ * Default template: update-version.html.twig.
  *
  * @param array $variables
  *   An associative array containing:
@@ -315,36 +337,28 @@ function template_preprocess_update_status_label(&$variables) {
  *     - date: The date of the release.
  *     - download_link: The URL for the downloadable file.
  *   - tag: The title of the project.
- *   - class: A string containing extra classes for the wrapping table.
- *
- * @ingroup themeable
- */
-function theme_update_version($variables) {
+*/
+function template_preprocess_update_version(&$variables) {
   $version = $variables['version'];
-  $tag = $variables['tag'];
-  $class = implode(' ', $variables['class']);
+  // Add version to the classes.
+  $variables['attributes']['class'][] = 'version';
+  // Convert the attributes array to an Attribute object.
+  $variables['attributes'] = new Attribute($variables['attributes']);
+
+  $variables['version_link'] = l($version['version'], $version['release_link']);
+  $variables['version_date'] = format_date($version['date'], 'custom', 'Y-M-d');
 
-  $output = '';
-  $output .= '<table class="version ' . $class . '">';
-  $output .= '<tr>';
-  $output .= '<td class="version-title">' . $tag . "</td>\n";
-  $output .= '<td class="version-details">';
-  $output .= l($version['version'], $version['release_link']);
-  $output .= ' <span class="version-date">(' . format_date($version['date'], 'custom', 'Y-M-d') . ')</span>';
-  $output .= "</td>\n";
-  $output .= '<td class="version-links">';
   $links = array();
-  $links['update-download'] = array(
+  $links['download'] = array(
     'title' => t('Download'),
     'href' => $version['download_link'],
   );
-  $links['update-release-notes'] = array(
+  $links['release-notes'] = array(
     'title' => t('Release notes'),
     'href' => $version['release_link'],
   );
-  $output .= theme('links__update_version', array('links' => $links));
-  $output .= '</td>';
-  $output .= '</tr>';
-  $output .= "</table>\n";
-  return $output;
+  $variables['version_links'] = array(
+    '#theme' => 'links__update_version',
+    '#links' => $links,
+  );
 }