Add and cross-link notes in optional module docs

Author: encukou

Doc/includes/optional-module.rst

@@ -3,3 +3,7 @@ If it is missing from your copy of CPython,
 look for documentation from your distributor (that is,
 whoever provided Python to you).
 If you are the distributor, see :ref:`optional-module-requirements`.
+
+.. Notes similar wording appear in these module docs:
+   - zipfile
+   - tarfile

Doc/library/idle.rst

@@ -37,6 +37,9 @@ IDLE has the following features:
 
 * configuration, browsers, and other dialogs
 
+.. include:: ../includes/optional-module.rst
+
+
 Menus
 -----
 

Doc/library/tarfile.rst

@@ -21,6 +21,14 @@ Some facts and figures:
 * reads and writes :mod:`gzip`, :mod:`bz2`, :mod:`compression.zstd`, and
   :mod:`lzma` compressed archives if the respective modules are available.
 
+  ..
+     The following paragraph should be similar to ../includes/optional-module.rst
+
+  If any of these :term:`optional modules <optional module>` are missing from
+  your copy of CPython, look for documentation from your distributor (that is,
+  whoever provided Python to you).
+  If you are the distributor, see :ref:`optional-module-requirements`.
+
 * read/write support for the POSIX.1-1988 (ustar) format.
 
 * read/write support for the GNU tar format including *longname* and *longlink*

Doc/library/tkinter.rst

@@ -36,6 +36,8 @@ details that are unchanged.
    Most documentation you will find online still uses the old API and
    can be woefully outdated.
 
+.. include:: ../includes/optional-module.rst
+
 .. seealso::
 
    * `TkDocs <https://tkdocs.com/>`_

Doc/library/turtle.rst

@@ -29,6 +29,8 @@ introduced in Logo <https://en.wikipedia.org/wiki/Turtle_
 (robot)>`_, developed by Wally Feurzeig, Seymour Papert and Cynthia Solomon
 in 1967.
 
+.. include:: ../includes/optional-module.rst
+
 
 Get started
 ===========

Doc/library/zipfile.rst

@@ -23,6 +23,16 @@ decryption of encrypted files in ZIP archives, but it currently cannot
 create an encrypted file.  Decryption is extremely slow as it is
 implemented in native Python rather than C.
 
+..
+   The following paragraph should be similar to ../includes/optional-module.rst
+
+Handling compressed archives requires :term:`optional modules <optional module>`
+such as :mod:`zlib`, :mod:`bz2`, :mod:`lzma`, :mod:`~compression.zstd`.
+If any of them are missing from your copy of CPython,
+look for documentation from your distributor (that is,
+whoever provided Python to you).
+If you are the distributor, see :ref:`optional-module-requirements`.
+
 The module defines the following items:
 
 .. exception:: BadZipFile

Doc/using/configure.rst

@@ -101,7 +101,7 @@ Dependencies to build optional modules are:
      - :mod:`sqlite3`
    * - `Tcl/Tk <https://www.tcl-lang.org/>`_
      - 8.5.12
-     - :mod:`tkinter`
+     - :mod:`tkinter`, :ref:`IDLE <idle>`, :mod:`turtle`
    * - `zlib <https://www.zlib.net>`_
      - 1.2.2.1
      - :mod:`zlib`, :mod:`gzip`, :mod:`ensurepip`