9.1.1
[refactor] Make base assertion comparisons return an iterator instead of a list of string (#14546)
[refactor] Make ``_compare_eq_mapping`` yield strings
[refactor] Make sequence comparison helpers yield strings
[refactor] Tighten ``SetComparisonFunction`` to ``Iterator[str]`` (#14587)
Move comparison helpers to their own files out of ``assertion/util.py`` (#14520)
[refactor] Make text comparison helpers yield strings
assertion/rewrite: remove unnecessary code in `AssertionRewritingHook.find_spec`
[truncate explanation] Remove some redundant checks by grouping them together