[3.11] gh-101100: Fix Sphinx nitpicks in `library/traceback.rst` (GH-113106)#113112

AlexWaygood merged 1 commit intopython:3.11python/cpython:3.11from

miss-islington:backport-d9e1b57-3.11miss-islington/cpython:backport-d9e1b57-3.11Copy head branch name to clipboard