Remove unnecessary newline and whitespace in app.py

This commit removes an unnecessary newline and whitespace in the app.py file to maintain code cleanliness and consistency.

app.py

@@ -33,7 +33,6 @@ def handle_message(persona, user_input, history):
         return history + [{"role": "assistant", "content": f"Error: {str(e)}"}]
 
 
-
 with gr.Blocks() as app:
     gr.Markdown("## 🤖 LLMates: Persona-based Chat Assistant")
 
@@ -87,4 +86,4 @@ with gr.Blocks() as app:
 
 # main function
 if __name__ == "__main__":
-    app.launch()
+    app.launch()