GeezerVison

• Issue: difflib.SequenceMatcher and Match: code and doc bugs #56593

The docs and docstrings described the results of SequenceMatcher.find_longest_match() and SequenceMatcher.get_matching_blocks() as plain (i, j, k) triples even though they are Match named tuples, and Match itself was not documented at all.

Changes:

• Add a Match named tuple description to Doc/library/difflib.rst (fields a, b, size), mirroring how other named tuple types like struct_time are documented.
• State the Match return type explicitly at the top of find_longest_match() and get_matching_blocks() in both the docs and the docstrings, and describe the no-match case as Match(alo, blo, 0).
• Replace "lists of strings" with "sequences of strings" in the docs for make_file, make_table, context_diff, ndiff, and unified_diff, matching the actual behavior and the existing docstrings.

Linked PRs

• difflib.SequenceMatcher and Match: code and doc bugs #56593