Victor's documentation comments

Author: AA-Turner

Doc/library/os.rst

@@ -146,8 +146,8 @@ level APIs also exhibit different default behaviours:
   to raise an exception rather than producing nonsense data.
 
 The :ref:`Python UTF-8 Mode <utf8-mode>` is enabled by default.
-It can be disabled using the :option:`-X utf8 <-X>` command line
-option or the :envvar:`PYTHONUTF8` environment variable.
+It can be disabled using the :option:`-X utf8=0 <-X>` command line
+option or the :envvar:`PYTHONUTF8=0 <PYTHONUTF8>` environment variable.
 The Python UTF-8 Mode can only be disabled at Python startup. Its value
 can be read from :data:`sys.flags.utf8_mode <sys.flags>`.
 

Doc/library/sys.rst

@@ -642,9 +642,6 @@ always available. Unless explicitly noted otherwise, all variables are read-only
    .. versionchanged:: 3.14
       Added the ``context_aware_warnings`` attribute.
 
-   .. versionchanged:: next
-      UTF-8 mode (:option:`-X utf8 <-X>`) is now enabled by default.
-
 
 .. data:: float_info