Apply suggestions from code review

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: corona10

Doc/whatsnew/3.15.rst

@@ -1253,9 +1253,9 @@ Build changes
   modules that are missing or packaged separately.
   (Contributed by Stan Ulbrych and Petr Viktorin in :gh:`139707`.)
 
-* Annotating anonymous mmap usage is now supported if Linux kernel supports ``PR_SET_VMA_ANON_NAME``.
+* Annotating anonymous mmap usage is now supported if Linux kernel supports ``PR_SET_VMA_ANON_NAME`` (Linux 5.17 or newer).
   Annotations are visible in ``/proc/<pid>/maps`` if the kernel supports the feature
-  and ``-X dev`` is passed to the Python or Python is built in debug mode.
+  and :option:`-X dev <-X>` is passed to the Python or Python is built in :ref:`debug mode <debug-build>`.
   (Contributed by Donghee Na in :gh:`141770`)