Issue #27304: Source code links for sub-packages in the same file.

Patch by Yoni Lavi

Doc/library/dbm.rst

@@ -128,6 +128,9 @@ The individual submodules are described in the following sections.
    :platform: Unix
    :synopsis: GNU's reinterpretation of dbm.
 
+**Source code:** :source:`Lib/dbm/gnu.py`
+
+--------------
 
 This module is quite similar to the :mod:`dbm` module, but uses the GNU library
 ``gdbm`` instead to provide some additional functionality.  Please note that the
@@ -237,6 +240,9 @@ supported.
    :platform: Unix
    :synopsis: The standard "database" interface, based on ndbm.
 
+**Source code:** :source:`Lib/dbm/ndbm.py`
+
+--------------
 
 The :mod:`dbm.ndbm` module provides an interface to the Unix "(n)dbm" library.
 Dbm objects behave like mappings (dictionaries), except that keys and values are
@@ -299,6 +305,8 @@ to locate the appropriate header file to simplify building this module.
 .. module:: dbm.dumb
    :synopsis: Portable implementation of the simple DBM interface.
 
+**Source code:** :source:`Lib/dbm/dumb.py`
+
 .. index:: single: databases
 
 .. note::
@@ -308,6 +316,8 @@ to locate the appropriate header file to simplify building this module.
    module is not written for speed and is not nearly as heavily used as the other
    database modules.
 
+--------------
+
 The :mod:`dbm.dumb` module provides a persistent dictionary-like interface which
 is written entirely in Python.  Unlike other modules such as :mod:`dbm.gnu` no
 external library is required.  As with other persistent mappings, the keys and

Doc/library/importlib.rst

@@ -211,6 +211,11 @@ Functions
 .. module:: importlib.abc
     :synopsis: Abstract base classes related to import
 
+**Source code:** :source:`Lib/importlib/abc.py`
+
+--------------
+
+
 The :mod:`importlib.abc` module contains all of the core abstract base classes
 used by :keyword:`import`. Some subclasses of the core abstract base classes
 are also provided to help in implementing the core ABCs.
@@ -700,6 +705,10 @@ ABC hierarchy::
 .. module:: importlib.machinery
     :synopsis: Importers and path hooks
 
+**Source code:** :source:`Lib/importlib/machinery.py`
+
+--------------
+
 This module contains the various objects that help :keyword:`import`
 find and load modules.
 
@@ -1082,6 +1091,11 @@ find and load modules.
 .. module:: importlib.util
     :synopsis: Utility code for importers
 
+
+**Source code:** :source:`Lib/importlib/util.py`
+
+--------------
+
 This module contains the various objects that help in the construction of
 an :term:`importer`.
 

Doc/library/json.rst

@@ -629,13 +629,19 @@ when serializing instances of "exotic" numerical types such as
 :class:`decimal.Decimal`.
 
 .. highlight:: bash
-.. module:: json.tool
 
 .. _json-commandline:
 
 Command Line Interface
 ----------------------
 
+.. module:: json.tool
+    :synopsis: A command line to validate and pretty-print JSON.
+
+**Source code:** :source:`Lib/json/tool.py`
+
+--------------
+
 The :mod:`json.tool` module provides a simple command line interface to validate
 and pretty-print JSON objects.