Fix Sphinx errors.

Author: serhiy-storchaka

Misc/NEWS.d/next/Library/2025-06-25-14-13-39.gh-issue-135661.idjQ0B.rst

@@ -4,7 +4,7 @@ Fix parsing start and end tags in :class:`html.parser.HTMLParser`.
   E.g. ``</ script>`` does not end the script section.
 
 * Vertical tabulation (``\v``) and non-ASCII whitespaces no longer recognized
-  as whitespaces. The only whitespaces are ``\t\n\r\f ``.
+  as whitespaces. The only whitespaces are ``\t\n\r\f`` and space.
 
 * Null character (U+0000) no longer ends the tag name.