[3.12] gh-101100: Fix Sphinx nitpicks in `library/inspect.rst` and `reference/simple_stmts.rst` (GH-113107) (#113109)

gh-101100: Fix Sphinx nitpicks in `library/inspect.rst` and `reference/simple_stmts.rst` (GH-113107)
(cherry picked from commit 4b3cb082da82da744f5db0b7315aa80558c51557)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>