Issue #22558: Add remaining doc links to source code for Python-coded modules.
Reformat header above separator line (added if missing) to a common format.
Patch by Yoni Lavi.
diff --git a/Doc/library/numbers.rst b/Doc/library/numbers.rst
index 718a50e..1b59495 100644
--- a/Doc/library/numbers.rst
+++ b/Doc/library/numbers.rst
@@ -4,6 +4,9 @@
.. module:: numbers
:synopsis: Numeric abstract base classes (Complex, Real, Integral, etc.).
+**Source code:** :source:`Lib/numbers.py`
+
+--------------
The :mod:`numbers` module (:pep:`3141`) defines a hierarchy of numeric
:term:`abstract base classes <abstract base class>` which progressively define