Update Doc/library/http.server.rst

Co-authored-by: donBarbos <[email protected]>

Author: jcomeauictx

Doc/library/http.server.rst

@@ -426,15 +426,15 @@ such as using different index file names by overriding the class attribute
 :attr:`index_pages`.
 
 
-By default, the server uses the MIME type ``'application/octet-stream'`` for
-the ``Content-Type`` header when the content type cannot be guessed from the
-URL's extension (if any). The option ``--default-content-type`` overrides
-this default with one of the user's choosing::
+.. option:: -default-content-type <content_type>
+
+   Specifies the Content-Type HTTP header. By default, the server uses the
+   MIME type ``'application/octet-stream'`` for the ``Content-Type`` header
+   when the content type cannot be guessed from the URL's extension (if any)::
 
         python -m http.server --default-content-type text/html
 
-.. versionchanged:: next
-   Added the ``--default-content-type`` option.
+   .. versionadded:: next
 
 .. class:: CGIHTTPRequestHandler(request, client_address, server)