avoid global pollution

.php-cs-fixer.dist.php

@@ -1,17 +1,17 @@
 <?php
 
-$finder = PhpCsFixer\Finder::create()
+$_phpcs_finder = PhpCsFixer\Finder::create()
   ->exclude('ext/amazon_s3/lib')
   ->exclude('vendor')
   ->exclude('data')
   ->in(__DIR__)
 ;
 
-$config = new PhpCsFixer\Config();
-return $config->setRules([
+$_phpcs_config = new PhpCsFixer\Config();
+return $_phpcs_config->setRules([
         '@PSR12' => true,
         //'strict_param' => true,
         'array_syntax' => ['syntax' => 'short'],
     ])
-    ->setFinder($finder)
+    ->setFinder($_phpcs_finder)
 ;