Removed redundant call of update_wrapper().
diff --git a/Lib/functools.py b/Lib/functools.py
index 06a4ff1..214523c 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -536,7 +536,7 @@
 
     wrapper.cache_info = cache_info
     wrapper.cache_clear = cache_clear
-    return update_wrapper(wrapper, user_function)
+    return wrapper
 
 try:
     from _functools import _lru_cache_wrapper