- Implement hashing and comparison.
- Make TestSuite pass all tests.
See also meta ticket #21202.
Depends on #21325
Depends on #21336
CC: @galipnik
Component: combinatorics
Author: Daniel Krenn
Branch/Commit: a7ecb88
Reviewer: Clemens Heuberger
Issue created by migration from https://trac.sagemath.org/ticket/21319