update readme

pengyu · pengyu · commit 66df8ba1380b · 2019-07-29T17:17:23.000+08:00
diff --git a/readme.md b/readme.md
@@ -80,7 +80,8 @@ exec "select * from help_keyword limit 5" --json
 ```
 
 返回的是一段`json`字符串，如下
-```
+```json
+[
 	{
 		"name":"(JSON",
 		"help_keyword_id":"670"

Original file line number	Diff line number	Diff line change
`@@ -80,7 +80,8 @@ exec "select * from help_keyword limit 5" --json`
`80`	`80`	```
`81`	`81`
`82`	`82`	返回的是一段`json`字符串，如下
`83`		-```
	`83`	+```json
	`84`	`+[`
`84`	`85`	`{`
`85`	`86`	`"name":"(JSON",`
`86`	`87`	`"help_keyword_id":"670"`