Remove surplus empty lines and convert more files to new optional arg style.
diff --git a/Doc/library/copyreg.rst b/Doc/library/copyreg.rst
index 60df3d0..f6dbaaf 100644
--- a/Doc/library/copyreg.rst
+++ b/Doc/library/copyreg.rst
@@ -1,6 +1,5 @@
-
 :mod:`copyreg` --- Register :mod:`pickle` support functions
-============================================================
+===========================================================
 
 .. module:: copyreg
    :synopsis: Register pickle support functions.