Reformat start_process stack initialization code to follow style

src/userprog/process.c

@@ -83,16 +83,16 @@ start_process (void *file_name_)
      command line input must fit in a page. Also keep track
      of pointers to the argument data within a linked list. */
   struct list arg_list;
-  list_init(&arg_list);
+  list_init (&arg_list);
 
   unsigned int arg_count = 1;
   while (arg != NULL)
     {
-      size_t arg_size = (strlen(arg) + 1) * sizeof (char);
+      size_t arg_size = (strlen (arg) + 1) * sizeof (char);
       if_.esp -= arg_size;
       memcpy (if_.esp, arg, arg_size);
       
-      struct arg_elem *arg_elem = malloc(sizeof (struct arg_elem));
+      struct arg_elem *arg_elem = malloc (sizeof (struct arg_elem));
       ASSERT (arg_elem != NULL);
       arg_elem->arg = arg;
       list_push_front (&arg_list, &arg_elem->elem);