bpo-12067: Add tests to test_compare by humbdrag · Pull Request #30667 · python/cpython

This appears more or less identical to the original PR, #3199, with original attributions and merge conflicts removed. Our workflow is to credit original authors and, when possible, to fix merge conflicts on the PR. I did so fairly easily, leaving this as redundant. If you have any comments or suggestions, please make them there.