From b422d987024cec7b6b2a61b76ec4d26ccedb66b9 Mon Sep 17 00:00:00 2001
From: dudaodong <lanliddd.2007@163.com>
Date: Fri, 13 Jan 2023 10:48:21 +0800
Subject: [PATCH] doc: format document

---
 docs/concurrency.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/concurrency.md b/docs/concurrency.md
index bac75db..fbaa75a 100644
--- a/docs/concurrency.md
+++ b/docs/concurrency.md
@@ -82,8 +82,8 @@ import (
 )
 
 func main() {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
+    ctx, cancel := context.WithCancel(context.Background())
+    defer cancel()
 
 	c := concurrency.NewChannel[int]()
 	genVals := func() <-chan <-chan int {