From ac9884663ddc7995ead2a14a82d4186eef3d7a82 Mon Sep 17 00:00:00 2001
From: xsrobin <50069408+xsrobin@users.noreply.github.com>
Date: Tue, 23 Jul 2019 16:02:39 +0800
Subject: [PATCH] update book 0723 (#1029)

---
 external/book | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/external/book b/external/book
index db95d2256..0aa844b15 160000
--- a/external/book
+++ b/external/book
@@ -1 +1 @@
-Subproject commit db95d22564bd94d4beaf4439f7c9b456e7510c6b
+Subproject commit 0aa844b15af5f09d1f7c9effa60ea0da1cd0c84f
-- 
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