Move dangling bullet points into named subsections (GH-13046)

Doc/whatsnew/3.8.rst

@@ -216,17 +216,6 @@ New Modules
 Improved Modules
 ================
 
-* The :meth:`_asdict()` method for :func:`collections.namedtuple` now returns
-  a :class:`dict` instead of a :class:`collections.OrderedDict`.  This works because
-  regular dicts have guaranteed ordering in since Python 3.7.  If the extra
-  features of :class:`OrderedDict` are required, the suggested remediation is
-  to cast the result to the desired type: ``OrderedDict(nt._asdict())``.
-  (Contributed by Raymond Hettinger in :issue:`35864`.)
-
-* The :mod:`unicodedata` module has been upgraded to use the `Unicode 12.0.0
-  <http://blog.unicode.org/2019/03/announcing-unicode-standard-version-120.html>`_
-  release.
-
 
 asyncio
 -------
@@ -234,6 +223,17 @@ asyncio
 On Windows, the default event loop is now :class:`~asyncio.ProactorEventLoop`.
 
 
+collections
+-----------
+
+The :meth:`_asdict()` method for :func:`collections.namedtuple` now returns
+a :class:`dict` instead of a :class:`collections.OrderedDict`.  This works because
+regular dicts have guaranteed ordering in since Python 3.7.  If the extra
+features of :class:`OrderedDict` are required, the suggested remediation is
+to cast the result to the desired type: ``OrderedDict(nt._asdict())``.
+(Contributed by Raymond Hettinger in :issue:`35864`.)
+
+
 ctypes
 ------
 
@@ -490,10 +490,15 @@ Added new clock :data:`~time.CLOCK_UPTIME_RAW` for macOS 10.12.
 unicodedata
 -----------
 
+* The :mod:`unicodedata` module has been upgraded to use the `Unicode 12.0.0
+  <http://blog.unicode.org/2019/03/announcing-unicode-standard-version-120.html>`_
+  release.
+
 * New function :func:`~unicodedata.is_normalized` can be used to verify a string
   is in a specific normal form. (Contributed by Max Belanger and David Euresti in
   :issue:`32285`).
 
+
 unittest
 --------