Update app.py

app.py

@@ -58,7 +58,7 @@ with gr.Blocks() as app:
     with gr.Row():
         start_date = gr.Textbox("2013-01-01", label="Start Date")
         end_date = gr.Textbox(datetime.now().date(), label="End Date")
-        tickers_string = gr.Textbox("AAPL, MSFT, AMZN", label="Enter tickers separated by comma")
+        tickers_string = gr.Textbox("AAPL,MSFT,AMZN", label="Enter tickers separated by comma")
         btn = gr.Button("Show Efficient Frontier")
     
     fig_efficient_frontier = gr.Plot(label="Efficient Frontier")