fix: not accepting an empty generation

app.py

@@ -72,6 +72,7 @@ def generate(
                 output = output.rstrip()
                 yield output
         yield output
+    
     return output
 
 
@@ -123,7 +124,11 @@ CSS = """
 p {direction: rtl; white-space: pre-line;}
 """
 
-chatbot = gr.Chatbot(bubble_full_width = False)
+chatbot = gr.Chatbot(label="PersianGPT",
+                     rtl=True,
+                     show_share_button=True,
+                     show_copy_button=True,
+                     bubble_full_width = False)
 textbox = gr.Textbox(
             label="textbox",
             container=False,
@@ -145,7 +150,7 @@ chat_interface = gr.ChatInterface(
 def evolve_text(x):
     
     possible_generation = "".join([x for x in generate(
-        x, "", additional_inputs[0].value, 
+        x if len(x)>0 else ">", "", additional_inputs[0].value, 
         temperature=additional_inputs[1].value, 
         max_new_tokens=10, 
         top_p=additional_inputs[3].value,