Update README.md

README.md

@@ -1,3 +1,4 @@
+```python
 def DummyTok(model_max_length=4):                                                 
     import tempfile                                                                  
                                                                                      
@@ -13,4 +14,5 @@ def DummyTok(model_max_length=4):
         )                                                                        
                                                                                  
     real_tokenizer.save("dummy_tokenizer.json")                                
-    return real_tokenizer         
+    return real_tokenizer
+```