v3.10.20
[3.10] gh-121277: Allow .. versionadded:: next in docs (GH-121278) (#127867)
bpo-41028: Doc: Move switchers to docsbuild-scripts. (GH-20969)
[3.10] Remove link to the PDF downloads (GH-139142) (#139431)
[3.10] [doc] Fix typos found using codespell (GH-28744) (GH-28758)
[3.10] gh-97709: Included newline separator in Mandelbrot set (GH-97737) (#97823)