commit 131cb7ac07e4025bb762128ed703ffd7f22684a8
Author: Joel Pittet <joel@pittet.ca>
Date:   Fri Nov 15 20:26:44 2013 -0800

    get rid of

diff --git a/core/modules/system/lib/Drupal/system/Form/ModulesListForm.php b/core/modules/system/lib/Drupal/system/Form/ModulesListForm.php
index 8bbd02b..a0427e4 100644
--- a/core/modules/system/lib/Drupal/system/Form/ModulesListForm.php
+++ b/core/modules/system/lib/Drupal/system/Form/ModulesListForm.php
@@ -163,18 +163,18 @@ public function buildForm(array $form, array &$form_state) {
   protected function buildRow(array $modules, $module, $distribution) {
     // Set the basic properties.
     $row['#version'] = $module->info['version'];
-    $row['#requires'] = isset($extra['#requires']) ? $extra['#requires'] : FALSE;
-    $row['#required_by'] = isset($extra['#required_by']) ? $extra['#required_by'] : FALSE;
+    $row['#requires'] = isset($row['#requires']) ? $row['#requires'] : FALSE;
+    $row['#required_by'] = isset($row['#required_by']) ? $row['#required_by'] : FALSE;
 
     // Add links for each module.
     // Used when checking if a module implements a help page.
     $help = $this->moduleHandler->moduleExists('help') ? drupal_help_arg() : FALSE;
 
     // Generate link for module's help page, if there is one.
-    $extra['links']['help'] = array();
+    $row['links']['help'] = array();
     if ($help && $module->status && in_array($module->name, $this->moduleHandler->getImplementations('help'))) {
       if ($this->moduleHandler->invoke($module->name, 'help', array("admin/help#$module->name", $help))) {
-        $extra['links']['help'] = array(
+        $row['links']['help'] = array(
           '#type' => 'link',
           '#title' => $this->t('Help'),
           '#href' => "admin/help/$module->name",
@@ -184,9 +184,9 @@ protected function buildRow(array $modules, $module, $distribution) {
     }
 
     // Generate link for module's permission, if the user has access to it.
-    $extra['links']['permissions'] = array();
+    $row['links']['permissions'] = array();
     if ($module->status && user_access('administer permissions') && in_array($module->name, $this->moduleHandler->getImplementations('permission'))) {
-      $extra['links']['permissions'] = array(
+      $row['links']['permissions'] = array(
         '#type' => 'link',
         '#title' => $this->t('Permissions'),
         '#href' => 'admin/people/permissions',
@@ -195,11 +195,11 @@ protected function buildRow(array $modules, $module, $distribution) {
     }
 
     // Generate link for module's configuration page, if it has one.
-    $extra['links']['configure'] = array();
+    $row['links']['configure'] = array();
     if ($module->status && isset($module->info['configure'])) {
       if ($this->accessManager->checkNamedRoute($module->info['configure'], array(), \Drupal::currentUser())) {
         $item = menu_get_item(trim($this->url($module->info['configure']), '/'));
-        $extra['links']['configure'] = array(
+        $row['links']['configure'] = array(
           '#type' => 'link',
           '#title' => $this->t('Configure'),
           '#route_name' => $module->info['configure'],
@@ -224,7 +224,7 @@ protected function buildRow(array $modules, $module, $distribution) {
     if (!empty($module->info['required'])) {
       // Used when displaying modules that are required by the installation profile
       $row['enable']['#disabled'] = TRUE;
-      $extra['#required_by'][] = $distribution . (!empty($module->info['explanation']) ? ' ('. $module->info['explanation'] .')' : '');
+      $row['#required_by'][] = $distribution . (!empty($module->info['explanation']) ? ' ('. $module->info['explanation'] .')' : '');
     }
 
     // Check the compatibilities.
@@ -252,7 +252,7 @@ protected function buildRow(array $modules, $module, $distribution) {
     // If this module is not compatible, disable the checkbox.
     if (!$compatible) {
       $row['enable']['#disabled'] = TRUE;
-      $extra['description'] = array(
+      $row['description'] = array(
         '#theme' => 'system_modules_incompatible',
         '#message' => $status,
       );
@@ -261,7 +261,7 @@ protected function buildRow(array $modules, $module, $distribution) {
     // If this module requires other modules, add them to the array.
     foreach ($module->requires as $dependency => $version) {
       if (!isset($modules[$dependency])) {
-        $extra['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">missing</span>)', array('@module' => Unicode::ucfirst($dependency)));
+        $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">missing</span>)', array('@module' => Unicode::ucfirst($dependency)));
         $row['enable']['#disabled'] = TRUE;
       }
       // Only display visible modules.
@@ -270,7 +270,7 @@ protected function buildRow(array $modules, $module, $distribution) {
         // Disable the module's checkbox if it is incompatible with the
         // dependency's version.
         if ($incompatible_version = drupal_check_incompatibility($version, str_replace(\Drupal::CORE_COMPATIBILITY . '-', '', $modules[$dependency]->info['version']))) {
-          $extra['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> version @version)', array(
+          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> version @version)', array(
             '@module' => $name . $incompatible_version,
             '@version' => $modules[$dependency]->info['version'],
           ));
@@ -279,16 +279,16 @@ protected function buildRow(array $modules, $module, $distribution) {
         // Disable the checkbox if the dependency is incompatible with this
         // version of Drupal core.
         elseif ($modules[$dependency]->info['core'] != \Drupal::CORE_COMPATIBILITY) {
-          $extra['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', array(
+          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-missing">incompatible with</span> this version of Drupal core)', array(
             '@module' => $name,
           ));
           $row['enable']['#disabled'] = TRUE;
         }
         elseif ($modules[$dependency]->status) {
-          $extra['#requires'][$dependency] = $this->t('@module', array('@module' => $name));
+          $row['#requires'][$dependency] = $this->t('@module', array('@module' => $name));
         }
         else {
-          $extra['#requires'][$dependency] = $this->t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $name));
+          $row['#requires'][$dependency] = $this->t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $name));
         }
       }
     }
@@ -298,11 +298,11 @@ protected function buildRow(array $modules, $module, $distribution) {
     foreach ($module->required_by as $dependent => $version) {
       if (isset($modules[$dependent]) && empty($modules[$dependent]->info['hidden'])) {
         if ($modules[$dependent]->status == 1 && $module->status == 1) {
-          $extra['#required_by'][$dependent] = $this->t('@module', array('@module' => $modules[$dependent]->info['name']));
+          $row['#required_by'][$dependent] = $this->t('@module', array('@module' => $modules[$dependent]->info['name']));
           $row['enable']['#disabled'] = TRUE;
         }
         else {
-          $extra['#required_by'][$dependent] = $this->t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $modules[$dependent]->info['name']));
+          $row['#required_by'][$dependent] = $this->t('@module (<span class="admin-disabled">disabled</span>)', array('@module' => $modules[$dependent]->info['name']));
         }
       }
     }
@@ -338,17 +338,17 @@ protected function buildRow(array $modules, $module, $distribution) {
         $description .= '<div class="admin-requirements">' . t('Version: !module-version', array('!module-version' => $module->info['version'])) . '</div>';
       }
       if ($row['#requires']) {
-        $description .= '<div class="admin-requirements">' . t('Requires: !module-list', array('!module-list' => implode(', ', $extra['#requires']))) . '</div>';
+        $description .= '<div class="admin-requirements">' . t('Requires: !module-list', array('!module-list' => implode(', ', $row['#requires']))) . '</div>';
       }
       if ($row['#required_by']) {
-        $description .= '<div class="admin-requirements">' . t('Required by: !module-list', array('!module-list' => implode(', ', $extra['#required_by']))) . '</div>';
+        $description .= '<div class="admin-requirements">' . t('Required by: !module-list', array('!module-list' => implode(', ', $row['#required_by']))) . '</div>';
       }
       $description .= '</div>';
     }
 
     $links = '';
     foreach (array('help', 'permissions', 'configure') as $key) {
-      $links .= (isset($extra['links'][$key]) ? drupal_render($extra['links'][$key]) : '');
+      $links .= (isset($row['links'][$key]) ? drupal_render($row['links'][$key]) : '');
     }
 
     if ($links) {