pythongh-133879: Improve consistency of full stops and whitespace in What's New (python#138635)

Author: picnixz

Doc/whatsnew/3.15.rst

@@ -295,6 +295,7 @@ dbm
   This may harm performance, but improve crash tolerance.
   (Contributed by Serhiy Storchaka in :gh:`66234`.)
 
+
 difflib
 -------
 
@@ -379,6 +380,7 @@ os.path
   the resulting path can be missing but it will be free of symlinks.
   (Contributed by Petr Viktorin for :cve:`2025-4517`.)
 
+
 resource
 --------
 
@@ -407,7 +409,7 @@ sqlite3
    * Prompts, error messages, and help text are now colored.
      This is enabled by default, see :ref:`using-on-controlling-color` for
      details.
-     (Contributed by Stan Ulbrych and Łukasz Langa in :gh:`133461`)
+     (Contributed by Stan Ulbrych and Łukasz Langa in :gh:`133461`.)
 
 
 ssl
@@ -433,7 +435,7 @@ ssl
      agreement groups compatible with the minimum and maximum TLS versions
      currently set in the context. This call requires OpenSSL 3.5 or later.
 
-   (Contributed by Ron Frederick in :gh:`136306`)
+   (Contributed by Ron Frederick in :gh:`136306`.)
 
 * Added a new method :meth:`ssl.SSLContext.set_ciphersuites` for setting TLS 1.3
   ciphers. For TLS 1.2 or earlier, :meth:`ssl.SSLContext.set_ciphers` should
@@ -692,12 +694,12 @@ New features
 
 * Add :c:type:`PyUnstable_Unicode_GET_CACHED_HASH` to get the cached hash of
   a string. See the documentation for caveats.
-  (Contributed by Petr Viktorin in :gh:`131510`)
+  (Contributed by Petr Viktorin in :gh:`131510`.)
 
 * Add API for checking an extension module's ABI compatibility:
   :c:data:`Py_mod_abi`, :c:func:`PyABIInfo_Check`, :c:macro:`PyABIInfo_VAR`
   and :c:data:`Py_mod_abi`.
-  (Contributed by Petr Viktorin in :gh:`137210`)
+  (Contributed by Petr Viktorin in :gh:`137210`.)
 
 
 Porting to Python 3.15
@@ -750,6 +752,7 @@ Deprecated C APIs
   :c:func:`_Py_c_abs` are :term:`soft deprecated`.
   (Contributed by Sergey B Kirpichev in :gh:`128813`.)
 
+
 .. Add C API deprecations above alphabetically, not here at the end.
 
 Removed C APIs
@@ -768,7 +771,7 @@ Removed C APIs
     Use :c:func:`PyCodec_Encode` instead; Note that some codecs (for example, "base64")
     may return a type other than :class:`bytes`, such as :class:`str`.
 
-  (Contributed by Stan Ulbrych in :gh:`133612`)
+  (Contributed by Stan Ulbrych in :gh:`133612`.)
 
 * :c:func:`!PyImport_ImportModuleNoBlock`: deprecated alias
   of :c:func:`PyImport_ImportModule`.