fixed return statement

app.py

@@ -13,23 +13,23 @@ from Gradio_UI import GradioUI
 def paper_finder(topics:list, max_paper:int)-> str: #it's import to specify the return type
     #Keep this format for the description / args / args description but feel free to modify the tool
     """
-    Searches arxiv.org for the most recently updated research papers on specified topics.
-
-    This tool leverages the arXiv API to fetch the latest research papers based on their update dates.
-    For each topic provided, it returns up to `max_paper` number of papers. Each paper entry includes:
-      - **Title:** The paper's title.
-      - **Authors:** The names of the first three authors (an ellipsis is added if there are more).
-      - **Published Date:** The publication date (formatted as YYYY-MM-DD).
-      - **Summary:** A short, truncated summary of the paper.
-      - **PDF Link:** A direct link to the paper's PDF (if available).
-
-    **Args:**
-      topics (list): A list of topic keywords or phrases (e.g., ['Computer Vision', 'NLP']) to guide the search.
-      max_paper (int): The maximum number of papers to retrieve for each topic.
-
-    **Returns:**
-      str: A markdown-formatted string that summarizes the latest papers for each topic. 
-           If an error occurs during the search for a topic, an error message will be included.
+        Searches arxiv.org for the most recently updated research papers on specified topics.
+
+        This tool leverages the arXiv API to fetch the latest research papers based on their update dates.
+        For each topic provided, it returns up to `max_paper` number of papers. Each paper entry includes:
+          - **Title:** The paper's title.
+          - **Authors:** The names of the first three authors (an ellipsis is added if there are more).
+          - **Published Date:** The publication date (formatted as YYYY-MM-DD).
+          - **Summary:** A short, truncated summary of the paper.
+          - **PDF Link:** A direct link to the paper's PDF (if available).
+
+        **Args:**
+          topics (list): A list of topic keywords or phrases (e.g., ['Computer Vision', 'NLP']) to guide the search.
+          max_paper (int): The maximum number of papers to retrieve for each topic.
+
+        **Returns:**
+          str: A markdown-formatted string that summarizes the latest papers for each topic. 
+               If an error occurs during the search for a topic, an error message will be included.
     """
 
     results = []
@@ -92,10 +92,7 @@ def paper_finder(topics:list, max_paper:int)-> str: #it's import to specify the
         except Exception as e:
             results.append(f"\n## Error searching for {topic}: {str(e)}\n")
         
-    if results:
-        return "\n".join(results)
-    else:
-        return "No papers found for the given topics. Try different search terms."
+    return "\n".join(results) if results else "No papers found for the given topics. Try different search terms."
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: