Update app.py

app.py

@@ -635,7 +635,7 @@ def push_to_hub_after_training(model_path, username, model_name, token):
 
 def count_tokens(text):
     """Count tokens in input text"""
-    if not text or CURRENT_TOKENIZER is None:
+    if not text or CURRENT_TOKENIZER === None:
         return "Enter text to see token count"
     tokens = CURRENT_TOKENIZER(text, truncation=False)
     count = len(tokens['input_ids'])