diff --git a/core/lib/Drupal/Core/Composer/Composer.php b/core/lib/Drupal/Core/Composer/Composer.php
index f4d2f74..23020ea 100644
--- a/core/lib/Drupal/Core/Composer/Composer.php
+++ b/core/lib/Drupal/Core/Composer/Composer.php
@@ -81,26 +81,26 @@ public static function preAutoloadDump(Event $event) {
     // that our files are present there.
     $repository = $event->getComposer()->getRepositoryManager()->getLocalRepository();
     // This is, essentially, a null constraint. We only care whether the package
-    // is present in vendor/ yet, but findPackage() requires it.
+    // is present in the vendor directory yet, but findPackage() requires it.
     $constraint = new Constraint('>', '');
     // Check for our packages, and then optimize them if they're present.
     if ($repository->findPackage('symfony/http-foundation', $constraint)) {
       $autoload = $package->getAutoload();
       $autoload['classmap'] = array_merge($autoload['classmap'], array(
-        $vendor_dir.'/symfony/http-foundation/Request.php',
-        $vendor_dir.'/symfony/http-foundation/ParameterBag.php',
-        $vendor_dir.'/symfony/http-foundation/FileBag.php',
-        $vendor_dir.'/symfony/http-foundation/ServerBag.php',
-        $vendor_dir.'/symfony/http-foundation/HeaderBag.php',
+        $vendor_dir . '/symfony/http-foundation/Request.php',
+        $vendor_dir . '/symfony/http-foundation/ParameterBag.php',
+        $vendor_dir . '/symfony/http-foundation/FileBag.php',
+        $vendor_dir . '/symfony/http-foundation/ServerBag.php',
+        $vendor_dir . '/symfony/http-foundation/HeaderBag.php',
       ));
       $package->setAutoload($autoload);
     }
     if ($repository->findPackage('symfony/http-kernel', $constraint)) {
       $autoload = $package->getAutoload();
       $autoload['classmap'] = array_merge($autoload['classmap'], array(
-        $vendor_dir.'/symfony/http-kernel/HttpKernel.php',
-        $vendor_dir.'/symfony/http-kernel/HttpKernelInterface.php',
-        $vendor_dir.'/symfony/http-kernel/TerminableInterface.php',
+        $vendor_dir . '/symfony/http-kernel/HttpKernel.php',
+        $vendor_dir . '/symfony/http-kernel/HttpKernelInterface.php',
+        $vendor_dir . '/symfony/http-kernel/TerminableInterface.php',
       ));
       $package->setAutoload($autoload);
     }