diff --git a/controllers/archiveController.php b/controllers/archiveController.php
index f0e89f9..06092b5 100644
--- a/controllers/archiveController.php
+++ b/controllers/archiveController.php
@@ -7,10 +7,15 @@ $app->get('{repo}/{format}ball/{branch}', function($repo, $format, $branch) use(
     $tree = $repository->getBranchTree($branch);
 
     if (false === $tree) {
-        return $app->abort(404, 'Invalid commit or tree reference: '.$branch);
+        return $app->abort(404, 'Invalid commit or tree reference: '. $branch);
     }
 
-    $file = $app['cache.archives'].DIRECTORY_SEPARATOR.$repo.DIRECTORY_SEPARATOR.substr($tree, 0, 2).DIRECTORY_SEPARATOR.substr($tree, 2).'.'.$format;
+    $file = $app['cache.archives'] . DIRECTORY_SEPARATOR
+            . $repo . DIRECTORY_SEPARATOR
+            . substr($tree, 0, 2) . DIRECTORY_SEPARATOR
+            . substr($tree, 2)
+            . '.'
+            . $format;
 
     if (!file_exists($file)) {
         $repository->createArchive($tree, $file, $format);