diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index 8ef7556..49cf05e 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -2318,37 +2318,39 @@ function hook_requirements($phase) {
/**
 * Define the current version of the database schema.
 *
 * A Drupal schema definition is an array structure representing one or[-*-] more
 {+*+} tables and their related keys and indexes. A schema is defined by
 * hook_schema() which must live in your module's .install file.
 *
 * This hook is called at install and uninstall time, and in the latter[-*-] case, it
 {+*+} cannot rely on the .module file being loaded or hooks being known.[-*-] If the
 {+*+} .module file is needed, it may be loaded with drupal_load().
 *
 * The tables declared by this hook will be automatically created when[-*-] the
 {+*+} module is first enabled, and removed when the module is uninstalled.[-*-] This
 {+*+} happens before hook_install() is invoked, and after hook_uninstall()[-*-] is
 {+*+} invoked, respectively.
 *
 * By declaring the tables used by your module via an implementation of
 * hook_schema(), these tables will be available on all supported database
 * engines. You don't have to deal with the different SQL dialects for table
 * creation and alteration of the supported database engines.
 *
 * See the Schema API Handbook at http://drupal.org/node/146843 for[-*-] details on
 {+*+} schema definition structures.
 *
 * @return {+array+}
 *   A schema definition structure array. For each element of the
 *   array, the key is a table name and the value is a table structure
 *   definition.
 *
 {+* @see hook_schema_alter()+}
{+ *+}
 * @ingroup schemaapi
 */
function hook_schema() {
  $schema['node'] = array(
    // [-example-]{+Example+} (partial) specification for table "node"{+.+}
    'description' => 'The base table for nodes.',
    'fields' => array(
      'nid' => array(