Nicholas Nethercote 2765432d32 Improve {BTreeMap,HashMap}::get_key_value docs.
They are unusual methods. The docs don't really describe the cases when
they might be useful (as opposed to just `get`), and the examples don't
demonstrate the interesting cases at all.

This commit improves the docs and the examples.
2024-11-18 16:53:12 +11:00
..