Run the examples in slow

src/transformers/modeling_ctrl.py

@@ -313,10 +313,15 @@ class CTRLModel(CTRLPreTrainedModel):
 
     Examples::
 
+        from transformers import CTRLTokenizer, CTRLModel
+        import torch
+
         tokenizer = CTRLTokenizer.from_pretrained('ctrl')
         model = CTRLModel.from_pretrained('ctrl')
+
         input_ids = torch.tensor(tokenizer.encode("Links Hello, my dog is cute", add_special_tokens=True)).unsqueeze(0)  # Batch size 1
         outputs = model(input_ids)
+
         last_hidden_states = outputs[0]  # The last hidden-state is the first element of the output tuple
 
         """