Update app.py

app.py

@@ -133,7 +133,7 @@ with gr.Blocks(css=css) as demo:
                 max_lines=1,
                 placeholder="Enter a negative prompt",
 #                value="bad quality,worst quality,worst detail,sketch,censor,"
-                value="monochrome, (low quality, worst quality:1.2), very displeasing, 3d, watermark, signature, ugly, poorly drawn
+                value="monochrome, (low quality, worst quality:1.2), very displeasing, 3d, watermark, signature, ugly, poorly drawn,"
             )
 
             seed = gr.Slider(