From 5a9439d4be5b949f1cc7f0249a91cb35e05a800c Mon Sep 17 00:00:00 2001
From: Zhiyuan Shao <zyshao@hust.edu.cn>
Date: Thu, 26 May 2022 14:43:03 +0800
Subject: [PATCH] Update chapter3_traps.md

---
 chapter3_traps.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/chapter3_traps.md b/chapter3_traps.md
index d1b23ef..1591db2 100644
--- a/chapter3_traps.md
+++ b/chapter3_traps.md
@@ -1568,7 +1568,7 @@ $ git commit -a -m "my work on lab1_3 is done."
 
 <a name="lab1_challenge1_backtrace"></a>
 
-## 3.5 lab1_challenge1 打印用户程序调用栈（难度：&#9733;&#9733;&#9734;&#9734;&#9734;）
+## 3.5 lab1_challenge1 打印用户程序调用栈（难度：&#9733;&#9733;&#9733;&#9734;&#9734;）
 
 <a name="lab1_challenge1_app"></a>
 
@@ -1747,7 +1747,7 @@ uint64 elf_fpread(elf_ctx *ctx, void *dest, uint64 nb, uint64 offset)
 
 <a name="lab1_challenge2_errorline"></a>
 
-## 3.6 lab1_challenge2 打印异常代码行（难度：&#9733;&#9733;&#9733;&#9733;&#9734;）
+## 3.6 lab1_challenge2 打印异常代码行（难度：&#9733;&#9733;&#9733;&#9734;&#9734;）
 
 <a name="lab1_challenge2_app"></a>