blk-mq-debugfs: separate flags with |

This reads more naturally than spaces.
Signed-off-by: NOmar Sandoval <osandov@fb.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NJens Axboe <axboe@fb.com>

block/blk-mq-debugfs.c

@@ -53,7 +53,7 @@ static int blk_flags_show(struct seq_file *m, const unsigned long flags,
 		if (!(flags & BIT(i)))
 			continue;
 		if (sep)
-			seq_puts(m, " ");
+			seq_puts(m, "|");
 		sep = true;
 		if (i < flag_name_count && flag_name[i])
 			seq_puts(m, flag_name[i]);