terminate string literal

app.py

@@ -761,7 +761,7 @@ soft = gr.themes.Soft(
     button_primary_background_fill='*primary_400'
 )
 
-css_adds = "#top_steps_grp {background: white; overflow: scroll; flex-direction: row;}
+css_adds = "#top_steps_grp {background: white; overflow: scroll; flex-direction: row;} \
             #group_row {background: white; border-color: white;} \
                #attribute_row {background: white; border-color: white;} \
                #tested_model_row {background: white; border-color: white;} \