test=develop, test=document_fix

doc/fluid/api_cn/tensor_cn/unsqueeze_cn.rst

@@ -30,7 +30,7 @@ unsqueeze
     import numpy as np
     with fluid.dygraph.guard():
         input_1 = np.random.random([5, 10]).astype("int32")
-        # input is a variable which shape is [5, 1, 10]
+        # input is a variable which shape is [5, 10]
         input = fluid.dygraph.to_variable(input_1)
 
         output = paddle.unsqueeze(input, axes=[1])