[3.12] gh-109546: Add more tests for formatting floats and fractions (GH-109548)#109557

Yhg1s merged 1 commit intopython:3.12python/cpython:3.12from

miss-islington:backport-beb5ec5-3.12miss-islington/cpython:backport-beb5ec5-3.12Copy head branch name to clipboard