[3.10] bpo-46013: Fix confusing kerning on period in docs (GH-29989)

[miss-islington]

(cherry picked from commit 3af68fc)

Co-authored-by: jmcb joel.mcbride1@live.com

https://bugs.python.org/issue46013

Automerge-Triggered-By: GH:iritkatriel

[the-knights-who-say-ni]

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[miss-islington]

@joelsgp and @iritkatriel: Status check is done, and it's a success ✅ .