Update app.py

app.py

@@ -189,7 +189,8 @@ def chat(
         if token == 0:
             next_tokens = pipeline.encode('\n\n')
         all_tokens += next_tokens
-
+        for xxx in occurrence:
+            occurrence[xxx] *= 0.996
         if token not in occurrence:
             occurrence[token] = 1
         else: