diff --git a/MDErrorReporter.php b/MDErrorReporter.php
index 7f3045b..9f47309 100644
--- a/MDErrorReporter.php
+++ b/MDErrorReporter.php
@@ -61,7 +61,7 @@ final class MDErrorReporter {
      */
     public function human_filesize(string $bytes, int $decimals = 2):string {
 
-        $size = ['B','kB','MB','GB','TB','PB','EB','ZB','YB'];
+        $size = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
         $factor = \floor((strlen($bytes) - 1) / 3);
         return \sprintf("%.{$decimals}f", $bytes / \pow(1024, $factor)) . $size[$factor];