From 4988461cd25fa4aacc31118c19a4951560178998 Mon Sep 17 00:00:00 2001
From: doubleTing <835497784@qq.com>
Date: Tue, 3 Nov 2020 11:40:40 +0800
Subject: [PATCH] Update doc4.md

---
 source/common/q_a/doc4.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/common/q_a/doc4.md b/source/common/q_a/doc4.md
index 233368b..3bce644 100644
--- a/source/common/q_a/doc4.md
+++ b/source/common/q_a/doc4.md
@@ -14,7 +14,7 @@
 
 `catkin build`
 
-如过去曾经编译成功过，可只执行 `caktin build` 即可。
+如过去曾经编译成功过，可只执行第二句命令 `caktin build` 即可。