From ba223e956609fac86e30efaa423dd324e7bc3ecc Mon Sep 17 00:00:00 2001
From: chengduozh <zhaochengduo@baidu.com>
Date: Wed, 13 Feb 2019 15:05:43 +0800
Subject: [PATCH] doc refine test=develop

---
 python/paddle/fluid/layers/nn.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py
index ea043b0eba..f4c4fc3b65 100644
--- a/python/paddle/fluid/layers/nn.py
+++ b/python/paddle/fluid/layers/nn.py
@@ -8331,6 +8331,8 @@ def stack(x, axis=0):
     If :code:`axis` < 0, it would be replaced with :code:`axis+rank(x[0])+1`.
     If :code:`axis` is None, it would be replaced with 0.
 
+    For Example:
+
     .. code-block:: text
 
         Case 1: