[xdoctest][task 111] Reformat example code with google style in...

[xdoctest][task 111] Reformat example code with google style in python/paddle/optimizer/rmsprop.py (#56227)

* [xdoctest][task 111] test=docs_preview

* fix whitespace test=docs_preview

python/paddle/optimizer/rmsprop.py

@@ -86,60 +86,61 @@ class RMSProp(Optimizer):
         parameters (list|tuple, optional): List/Tuple of ``Tensor`` to update to minimize ``loss``.
           This parameter is required in dygraph mode. And you can specify different options for
           different parameter groups such as the learning rate, weight decay, etc,
-          then the parameters are list of dict. Note that the learning_rate in paramter groups
+          then the parameters are list of dict. Note that the learning_rate in parameter groups
           represents the scale of base learning_rate.
           The default value is None in static graph mode, at this time all parameters will be updated.
         weight_decay (float|WeightDecayRegularizer, optional): The strategy of regularization.
-          It canbe a float value as coeff of L2 regularization or \
+          It can be a float value as coeff of L2 regularization or \
           :ref:`api_fluid_regularizer_L1Decay`, :ref:`api_fluid_regularizer_L2Decay`.
           If a parameter has set regularizer using :ref:`api_fluid_ParamAttr` already,
           the regularization setting here in optimizer will be ignored for this parameter.
           Otherwise, the regularization setting here in optimizer will take effect.
           Default None, meaning there is no regularization.
-        grad_clip (GradientClipBase, optional): Gradient cliping strategy, it's an instance of
-          some derived class of ``GradientClipBase`` . There are three cliping strategies
+        grad_clip (GradientClipBase, optional): Gradient clipping strategy, it's an instance of
+          some derived class of ``GradientClipBase`` . There are three clipping strategies
           ( :ref:`api_fluid_clip_GradientClipByGlobalNorm` , :ref:`api_fluid_clip_GradientClipByNorm` ,
           :ref:`api_fluid_clip_GradientClipByValue` ). Default None, meaning there is no gradient clipping.
         name (str, optional): This parameter is used by developers to print debugging information.
           For details, please refer to :ref:`api_guide_Name`. Default is None.
 
     Examples:
-          .. code-block:: python
-
-            import paddle
-
-            inp = paddle.rand([10,10], dtype="float32")
-            linear = paddle.nn.Linear(10, 10)
-            out = linear(inp)
-            loss = paddle.mean(out)
-
-            rmsprop = paddle.optimizer.RMSProp(learning_rate=0.1,
-                             parameters=linear.parameters(),
-                                       weight_decay=0.01)
-            out.backward()
-            rmsprop.step()
-            rmsprop.clear_grad()
-
-            #Note that the learning_rate of linear_2 is 0.01.
-            linear_1 = paddle.nn.Linear(10, 10)
-            linear_2 = paddle.nn.Linear(10, 10)
-            inp = paddle.uniform(shape=[10, 10], min=-0.1, max=0.1)
-            out = linear_1(inp)
-            out = linear_2(out)
-            loss = paddle.mean(out)
-            rmsprop = paddle.optimizer.RMSProp(
-                learning_rate=0.1,
-                parameters=[{
-                    'params': linear_1.parameters()
-                }, {
-                    'params': linear_2.parameters(),
-                    'weight_decay': 0.001,
-                    'learning_rate': 0.1
-                }],
-                weight_decay=0.01)
-            out.backward()
-            rmsprop.step()
-            rmsprop.clear_grad()
+            .. code-block:: python
+
+                >>> import paddle
+
+                >>> inp = paddle.rand([10,10], dtype="float32")
+                >>> linear = paddle.nn.Linear(10, 10)
+                >>> out = linear(inp)
+                >>> loss = paddle.mean(out)
+
+                >>> rmsprop = paddle.optimizer.RMSProp(learning_rate=0.1,
+                ...                     parameters=linear.parameters(),
+                ...                             weight_decay=0.01)
+                >>> out.backward()
+                >>> rmsprop.step()
+                >>> rmsprop.clear_grad()
+
+                >>> # Note that the learning_rate of linear_2 is 0.01.
+                >>> linear_1 = paddle.nn.Linear(10, 10)
+                >>> linear_2 = paddle.nn.Linear(10, 10)
+                >>> inp = paddle.uniform(shape=[10, 10], min=-0.1, max=0.1)
+                >>> out = linear_1(inp)
+                >>> out = linear_2(out)
+                >>> loss = paddle.mean(out)
+                >>> rmsprop = paddle.optimizer.RMSProp(
+                ...     learning_rate=0.1,
+                ...     parameters=[{
+                ...         'params': linear_1.parameters()
+                ...     }, {
+                ...         'params': linear_2.parameters(),
+                ...         'weight_decay': 0.001,
+                ...         'learning_rate': 0.1
+                ...     }],
+                ...     weight_decay=0.01
+                ... )
+                >>> out.backward()
+                >>> rmsprop.step()
+                >>> rmsprop.clear_grad()
     """
 
     _momentum_acc_str = "momentum"