polish warning message.

Author: hbwx24

python/paddle/fluid/dygraph/jit.py

@@ -760,7 +760,7 @@ def fun(inputs):
 
                 if static_function._class_instance is None:
                     warnings.warn(
-                        'Only when {} does not contain parameters, `jit.save` can succeed. If it contains parameters, please confirm that it is a member function of `paddle.nn.Layer` and these parameters are in `state_dict`, otherwise it cannot be saved with `jit.save`'.
+                        '`jit.save` will only save the `Program`, not the parameters. If you have to save the parameters, please make sure that {} is a member function of `paddle.nn.Layer` and the saved parameters are in `state_dict`'.
                         format(layer))
 
         dygraph_state_dict = None

python/paddle/fluid/tests/unittests/test_jit_save_load.py

@@ -1312,10 +1312,8 @@ def anothor_forward(self, x):
         inps = paddle.rand([3, 5])
         origin = layer.anothor_forward(inps)
 
-        func = paddle.jit.to_static(
-            layer.anothor_forward, [paddle.static.InputSpec(shape=[-1, 5])])
         path = 'test_jit_save_load_function_with_params_case3/func'
-        paddle.jit.save(func, path)
+        paddle.jit.save(layer.anothor_forward, path)
         load_func = paddle.jit.load(path)
 
         load_result = load_func(inps)