Add to What's New, combine NEWS files, update reference, use sentence case

https://devguide.python.org/documentation/style-guide/\#capitalization

Author: hugovk

Doc/library/cmdline.rst

@@ -24,7 +24,7 @@ The following modules have a command-line interface.
 * :mod:`!idlelib`
 * :ref:`inspect <inspect-module-cli>`
 * :ref:`json <json-commandline>`
-* :mod:`mimetypes`
+* :ref:`mimetypes <mimetypes-cli>`
 * :mod:`pdb`
 * :mod:`pickle`
 * :ref:`pickletools <pickletools-cli>`

Doc/library/mimetypes.rst

@@ -191,7 +191,7 @@ An example usage of the module::
 
 .. _mimetypes-objects:
 
-MimeTypes Objects
+MimeTypes objects
 -----------------
 
 The :class:`MimeTypes` class may be useful for applications which may want more
@@ -309,9 +309,9 @@ than one MIME-type database; it provides an interface similar to the one of the
       official MIME types, otherwise to the non-standard ones.
 
 
-.. mimetypes-cli:
+.. _mimetypes-cli:
 
-Command-Line Usage
+Command-line usage
 ------------------
 
 The :mod:`!mimetypes` module can be executed as a script from the command line.
@@ -350,7 +350,7 @@ standard error stream and exits with the return code ``1``.
 
 .. mimetypes-cli-example:
 
-Command-Line Example
+Command-line example
 --------------------
 
 Here are some examples of typical usage of the :mod:`!mimetypes` command-line

Doc/whatsnew/3.14.rst

@@ -641,6 +641,13 @@ json
 mimetypes
 ---------
 
+* Document the command-line for :mod:`mimetypes`.
+  It now exits with ``1`` on failure instead of ``0``
+  and ``2`` on incorrect command-line parameters instead of ``1``.
+  Also, errors are printed to stderr instead of stdout and their text is made
+  tighter.
+  (Contributed by Oleg Iarygin and Hugo van Kemenade in :gh:`93096`.)
+
 * Add MS and :rfc:`8081` MIME types for fonts:
 
   * Embedded OpenType: ``application/vnd.ms-fontobject``

Misc/NEWS.d/next/Documentation/2022-05-23-11-53-24.gh-issue-93096.TIuIhx.rst

@@ -1,4 +1,5 @@
-Command-line :mod:`mimetypes` now exits with ``1`` on failure instead of ``0``
-and ``2`` on incorrect command line parameters instead of ``1``.
+Document the command-line for :mod:`mimetypes`.
+It now exits with ``1`` on failure instead of ``0``
+and ``2`` on incorrect command-line parameters instead of ``1``.
 Also, errors are printed to stderr instead of stdout and their text is made
-tighter. Patch by Oleg Iarygin.
+tighter. Patch by Oleg Iarygin and Hugo van Kemenade.