Apply suggestions from code review

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Author: corona10

Doc/library/mmap.rst

@@ -333,7 +333,7 @@ To map anonymous memory, -1 should be passed as the fileno along with the length
       Annotate the memory mapping with the given *name* for easier identification
       in ``/proc/<pid>/maps`` if the kernel supports the feature and :option:`-X dev <-X>` is passed
       to Python or if Python is built in :ref:`debug mode <debug-build>`.
-      The length of *name* must not exceed 67 bytes including '\0'.
+      The length of *name* must not exceed 67 bytes including the ``'\0'`` terminator.
 
       .. availability:: Linux >= 5.17 (kernel built with ``CONFIG_ANON_VMA_NAME`` option)