diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 2517500..494b267 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -385,7 +385,7 @@ function install_begin_request(&$install_state) {
     $container
       ->register('keyvalue', 'Drupal\Core\KeyValueStore\KeyValueFactory')
       ->addArgument(new Reference('service_container'));
-		$container
+    $container
       ->register('keyvalue.memory', 'Drupal\Core\KeyValueStore\KeyValueMemoryFactory');
     $container->register('lock', 'Drupal\Core\Lock\NullLockBackend');
     $conf['cache_classes'] = array('cache' => 'Drupal\Core\Cache\MemoryBackend');
@@ -990,26 +990,26 @@ function install_system_rebuild(&$install_state) {
   // We need to unset all overrides and rebuild all necessary facilities to get
   // into a regular bootstrap state.
   unset($conf['cache_classes']);
-	unset($conf['keyvalue_default']);
+  unset($conf['keyvalue_default']);

   // Ensure that custom service definitions in a prepared settings.php are
   // applied. This effectively allows to install Drupal with custom Cache,
   // KeyValue, and Lock backends in the non-interactive installer.
   $conf_path = conf_path();
-	if (is_readable(DRUPAL_ROOT . '/' . $conf_path . '/settings.php')) {
+  if (is_readable(DRUPAL_ROOT . '/' . $conf_path . '/settings.php')) {
     include DRUPAL_ROOT . '/' . $conf_path . '/settings.php';
   }

   Drupal::moduleHandler()->reload();
-	system_list_reset();
-	Drupal::moduleHandler()->resetImplementations();
+  system_list_reset();
+  Drupal::moduleHandler()->resetImplementations();

-	// Bootstrap, but avoid session initialization.
+  // Bootstrap, but avoid session initialization.
   // @see install_begin_request()
   drupal_bootstrap(DRUPAL_BOOTSTRAP_VARIABLES);
-	_drupal_bootstrap_code();
-	$kernel = new DrupalKernel('prod', TRUE, drupal_classloader(), FALSE);
-	$kernel->boot();
+  _drupal_bootstrap_code();
+  $kernel = new DrupalKernel('prod', TRUE, drupal_classloader(), FALSE);
+  $kernel->boot();

   $install_state['base_system_verified'] = TRUE;
 }
diff --git a/core/includes/install.inc b/core/includes/install.inc
index 5d6cb38..8a211a4 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -642,7 +642,7 @@ function drupal_install_system() {
   if ($last_removed = Drupal::moduleHandler()->invoke($module, 'update_last_removed')) {
     $version = max($version, $last_removed);
   }
-	drupal_set_installed_schema_version($module, $version);
+  drupal_set_installed_schema_version($module, $version);

   // Install default configuration.
   config_install_default_config('module', $module);