fix link, test=document_fix (#3070)

Author: jerrywgz

docs/tutorials/INSTALL.md

@@ -6,7 +6,7 @@ English | [简体中文](INSTALL_cn.md)
 This document covers how to install PaddleDetection and its dependencies
 (including PaddlePaddle), together with COCO and Pascal VOC dataset.
 
-For general information about PaddleDetection, please see [README.md](https://github.com/PaddlePaddle/PaddleDetection/blob/develop/).
+For general information about PaddleDetection, please see [README.md](https://github.com/PaddlePaddle/PaddleDetection/tree/develop).
 
 ## Requirements:
 

docs/tutorials/PrepareDataSet.md

@@ -335,7 +335,7 @@ dataset/xxx/
 
 以[Kaggle数据集](https://www.kaggle.com/andrewmvd/road-sign-detection) 比赛数据为例，说明如何准备自定义数据。
 Kaggle上的 [road-sign-detection](https://www.kaggle.com/andrewmvd/road-sign-detection) 比赛数据包含877张图像，数据类别4类：crosswalk，speedlimit，stop，trafficlight。
-可从Kaggle上下载，也可以从[下载链接](https://paddlemodels.bj.bcebos.com/object_detection/roadsign.tar) 下载。
+可从Kaggle上下载，也可以从[下载链接](https://paddlemodels.bj.bcebos.com/object_detection/roadsign_voc.tar) 下载。
 路标数据集示例图：
 ![](../images/road554.png)