[hakarrr]

variables("{a}") == {"a", "b"} currently returns True, and variables("") == set() returns False. Equality with a non-OrderedSet operand uses not isdisjoint(), so it checks for any shared member rather than equal contents. The same problem affects URITemplate.variable_names.

Compare set contents for these operands. OrderedSet-to-OrderedSet comparisons keep their existing order-sensitive behavior, and iterable operands remain supported.

Added three regression methods covering built-in sets/frozensets in both operand orders, empty/disjoint/overlapping sets, ordered comparisons, lists, tuples and iterators. Eleven subtests fail on the unmodified base. An exhaustive 256-pair subset oracle also passes in both directions.

Validation on Linux:

• Full suite: 61 tests pass on CPython 3.9, 3.10, 3.11 and 3.12. Python 3.10-3.12 additionally report all 93 unittest subtests passing; Python 3.9 runs them without a separate pytest count.
• Combined line/branch coverage: 92%.
• Black, Flake8, isort, strict Mypy and applicable configured pre-commit hooks pass.
• Wheel/sdist build and git diff checks pass.

Python 3.13/3.14 and other operating systems were not run locally.