Updates 家长端服务/接口文档.md

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@@ -153,20 +153,19 @@ GET https://api.boxfish.cn/parents/learning-between/{student_id}/{start_date}/{e
 
 返回值
 ```json
- [
-	  {
-	    "learningTime": 1372,
+ [	  
+       {  "learningTime": 1372,
 	    "date": "2016-11-25"
-	  },
-	  {
+      },
+      {
 	    "learningTime": 6216,
 	    "date": "2016-11-26"
-	  },
-	  {
-	    "learningTime": 3106,
-	    "date": "2016-11-27"
-	  }
-	]
+      },
+      {
+	 "learningTime": 3106,
+	 "date": "2016-11-27"
+      }
+ ]
 ```