Apply suggestions from code review

Author: vstinner

Doc/deprecations/c-api-pending-removal-in-3.20.rst

@@ -1,7 +1,7 @@
 Pending removal in Python 3.20
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-* The ``cval`` field in :c:type:`PyComplexObject` (:gh:`128813`):
+* The ``cval`` field in :c:type:`PyComplexObject` (:gh:`128813`).
   Use :c:func:`PyComplex_AsCComplex` and :c:func:`PyComplex_FromCComplex`
   to convert a Python complex number to/from the C :c:type:`Py_complex`
   representation.

Doc/whatsnew/3.15.rst

@@ -571,7 +571,7 @@ Deprecated C APIs
   (Contributed by Serhiy Storchaka in :gh:`132629`.)
 
 * Deprecate :c:member:`~PyComplexObject.cval` field of the the
-  :c:type:`PyComplexObject` type:
+  :c:type:`PyComplexObject` type.
   Use :c:func:`PyComplex_AsCComplex` and :c:func:`PyComplex_FromCComplex`
   to convert a Python complex number to/from the C :c:type:`Py_complex`
   representation.