Issue #10446: Several changes to module documentation generated by pydoc:

1. Online reference manual link is now version-specific and the
   'MODULE DOCS' section renamed to 'MODULE REFERENCE'.

2. 'FILE' section is moved to the end of the file.

3. Special names processed by pydoc such as __version__ or __credits__
   are now excluded from the DATA section.

4. Defined __all__ to prevent pydoc from exposing undocumented details
   about itself.

5. Removed Python 2.3 compatibility code.
diff --git a/Lib/test/pydoc_mod.py b/Lib/test/pydoc_mod.py
index 9c53324..f86b5c6 100644
--- a/Lib/test/pydoc_mod.py
+++ b/Lib/test/pydoc_mod.py
@@ -3,7 +3,7 @@
 __author__ = "Benjamin Peterson"
 __credits__ = "Nobody"
 __version__ = "1.2.3.4"
-
+__xyz__ = "X, Y and Z"
 
 class A:
     """Hello and goodbye"""