From ef5fedf1bc6e74da6ef05bf732d1903632119c25 Mon Sep 17 00:00:00 2001
From: catplanet <catplanet@qq.com>
Date: Tue, 14 Feb 2017 13:36:28 +0800
Subject: [PATCH] fix: api problem in 04.7.md

---
 eBook/04.7.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/eBook/04.7.md b/eBook/04.7.md
index 8ea2fa3..253c999 100644
--- a/eBook/04.7.md
+++ b/eBook/04.7.md
@@ -232,7 +232,7 @@ func main() {
 `Join` 用于将元素类型为 string 的 slice 使用分割符号来拼接组成一个字符串：
 
 ```go
-Strings.Join(sl []string, sep string)
+strings.Join(sl []string, sep string) string
 ```
 
 示例 4.18 [strings_splitjoin.go](examples/chapter_4/strings_splitjoin.go)