update example, test=develop

doc/paddle/api/paddle/tensor/manipulation/reshape_cn.rst

@@ -41,16 +41,18 @@ reshape
   import numpy as np
   import paddle
 
-  data = np.random.random([2, 4, 6]).astype("float32")
-  x = paddle.to_tensor(data)
-  positive_four = paddle.fill_constant([1], "int32", 4)
-  out_1 = paddle.reshape(x, [-1, 0, 3, 2])
-  # the shape of out_1 is [2,4,3,2].
-  out_2 = paddle.reshape(x, shape=[positive_four, 12])
+  x = paddle.rand([2, 4, 6], dtype="float32")
+  positive_four = paddle.full([1], 4, "int32")
+  out = paddle.reshape(x, [-1, 0, 3, 2])
+  print(out)
+  # the shape is [2,4,3,2].
+  out = paddle.reshape(x, shape=[positive_four, 12])
+  print(out)
   # the shape of out_2 is [4, 12].
   shape_tensor = paddle.to_tensor(np.array([8, 6]).astype("int32"))
-  out_3 = paddle.reshape(x, shape=shape_tensor)
-  # the shape of out_2 is [8, 6].
+  out = paddle.reshape(x, shape=shape_tensor)
+  print(out)
+  # the shape is [8, 6].