remove cache and fix warning

app.py

@@ -38,7 +38,7 @@ def create_knowledge_base(chunks):
 # Hugging Face 모델 로드
 def load_model():
     model_name = "halyn/gemma2-2b-it-finetuned-paperqa"  # 텍스트 생성 모델 사용
-    tokenizer = AutoTokenizer.from_pretrained(model_name)
+    tokenizer = AutoTokenizer.from_pretrained(model_name, clean_up_tokenization_spaces=False)
     model = AutoModelForCausalLM.from_pretrained(model_name)
     return pipeline("text-generation", model=model, tokenizer=tokenizer, max_new_tokens=150, temperature=0.1)