do not add generation prompt in the end of example

train_with_unsloth.py

@@ -105,7 +105,7 @@ def load_fitting_samples(dataset_id, tokenizer, max_len, n_samples, seed=3407):
         text = tokenizer.apply_chat_template(
             example["messages"],
             tokenize=False,
-            add_generation_prompt=True,
+            add_generation_prompt=False,
         )
         # 3) Quick length check on token IDs
         tokens = tokenizer(text, add_special_tokens=False)["input_ids"]