Revert copy_reg -> copyreg rename.
diff --git a/Lib/copy.py b/Lib/copy.py
index 26ab366..f3871e5 100644
--- a/Lib/copy.py
+++ b/Lib/copy.py
@@ -49,7 +49,7 @@
 """
 
 import types
-from copyreg import dispatch_table
+from copy_reg import dispatch_table
 
 class Error(Exception):
     pass