Fix comment indentation

MD_STD.php

@@ -9,7 +9,6 @@
  * functions.
  */
 final class MD_STD {
-
     /**
      * Wrapper around file_get_contents, that provides catches errors on it and returns
      * with type safety.
@@ -431,5 +430,4 @@ public static function ensure_file(string $filepath, array $accepted_mimetype =
         }
 
     }
-
 }