Reformat priority_more to obey code style

src/threads/thread.c

@@ -362,7 +362,7 @@ thread_foreach (thread_action_func *func, void *aux)
    with a_ has a higher priority than that of b_. */
 bool
 priority_more (const struct list_elem *a_, const struct list_elem *b_,
-                   void *aux UNUSED)
+               void *aux UNUSED)
 {
   struct thread *a = list_entry (a_, struct thread, elem);
   struct thread *b = list_entry (b_, struct thread, elem);