Apply suggestions from code review

Co-authored-by: Zachary Ware <zachary.ware@gmail.com>

Author: zware

Doc/license.rst

@@ -959,8 +959,8 @@ on the cfuhash project::
 libmpdec
 --------
 
-Previously, the :mod:`!_decimal` C extension underlying the :mod:`decimal` module
-was built using an included copy of the libmpdec
+The :mod:`!_decimal` C extension underlying the :mod:`decimal` module
+is built using an included copy of the libmpdec
 library unless the build is configured ``--with-system-libmpdec``::
 
    Copyright (c) 2008-2020 Stefan Krah. All rights reserved.

Doc/whatsnew/3.13.rst

@@ -2597,7 +2597,7 @@ Build Changes
 
   .. _mimalloc library: https://github.com/microsoft/mimalloc/
 
-* The :file:`configure` option :option:!--with-system-libmpdec`
+* The :file:`configure` option :option:`!--with-system-libmpdec`
   now defaults to ``yes``.
   The bundled copy of ``libmpdec`` will be removed in Python 3.16.