fix old

app.py

@@ -130,7 +130,8 @@ def generator(
     )  # stop generation whenever you see any token here
 
     instruction = re.sub(r"\n{2,}", "\n", instruction).strip().replace("\r\n", "\n")
-    input = re.sub(r"\n{2,}", "\n", input).strip().replace("\r\n", "\n")
+    if input is not None:
+        input = re.sub(r"\n{2,}", "\n", input).strip().replace("\r\n", "\n")
     ctx = generate_prompt(instruction, input, history)
     print(ctx + "\n")