Fix attributes in self-closing tags

qwq_tokenizer_config.json

@@ -227,7 +227,7 @@
     "<|video_pad|>"
   ],
   "bos_token": null,
-  "chat_template": "{%- for message in messages %}\n    {{- '<|im_start|>' + message.role + '\\n' + message.content + '<|im_end|>\\n' }}\n{%- endfor %}\n{%- if add_generation_prompt %}\n    {{- '<|im_start|>assistant\\n' }}\n{%- endif %}",
+  "chat_template": "{%- for message in messages %}\n    {{- '<|im_start|>' + message.role + '\\n' + message.content }}\n    {%- if not loop.last %}\n        {{- '<|im_end|>\\n' }}\n    {%- endif %}\n{%- endfor %}\n{%- if add_generation_prompt %}\n    {{- '\\n<|im_start|>assistant\\n' }}\n{%- endif %}",
   "clean_up_tokenization_spaces": false,
   "eos_token": "<|im_end|>",
   "errors": "replace",