[3.11] gh-101100: Fix Sphinx warnings in `library/tty.rst` (GH-111079) (#111098)

gh-101100: Fix Sphinx warnings in `library/tty.rst` (GH-111079)

Fix Sphinx warnings in library/tty.rst
(cherry picked from commit c42c68aa7bd19b0de7f2132ed468bc4ce83d8aa9)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>