From e8a2cb546056092d712fe039e5a579c6145a280c Mon Sep 17 00:00:00 2001
From: qiwang067 <qiwang067@163.com>
Date: Thu, 18 Aug 2022 16:51:40 +0800
Subject: [PATCH] udpate ch4

---
 docs/chapter4/chapter4.md | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/docs/chapter4/chapter4.md b/docs/chapter4/chapter4.md
index 6d19803..f514eec 100644
--- a/docs/chapter4/chapter4.md
+++ b/docs/chapter4/chapter4.md
@@ -186,7 +186,8 @@ $$
 <img width="550" src="../img/ch4/4.10.png"/>
 </div>
 <div align=center>图 4.9 自动求梯度</div>
-    
+
+
 ## 4.2 策略梯度实现技巧
 下面我们介绍一些在实现策略梯度时可以使用的技巧。
 ### 4.2.1 技巧 1：添加基线