diff --git a/src/Str.php b/src/Str.php
index 34b34e0..576fa47 100644
--- a/src/Str.php
+++ b/src/Str.php
@@ -623,7 +623,7 @@ public static function cleanWhitespace(string $str, string $charlist = " \t\n\r\
         return trim(preg_replace('/[\t\n\r\s]+/', ' ', $str), $charlist);
     }
     
-/**
+    /**
      * Tests a string as a Regular Expression (regex)
      * @return bool true if valid.
      */