add placeholder example

ragatouille_search.py

@@ -82,7 +82,7 @@ def create_ragatouille_interface():
             """
         )
 
-        query = gr.Textbox(label="Query")
+        query = gr.Textbox(label="Query", placeholder="medieval handwriting")
         k = gr.Slider(1, 100, value=DEFAULT_K, step=1, label="Number of Results")
         make_unique = gr.Checkbox(False, label="Unique Results")
         search_button = gr.Button("Search")