[anticipate218]

Callable instances and class constructors with two positional parameters are currently inferred to need three arguments. For example, if an instance implements __call__(self, left, right), curry(instance)(1)(2) returns another curry wrapper instead of invoking it. The extra argument count can also make a partially curried instance consume an unwanted collection index when used with map_.

Use the public signature for fixed positional callables so implicitly supplied receivers are excluded. Preserve getfullargspec's existing treatment of wrappers with follow_wrapped=False; explicit arity and inference for keyword-only or variadic signatures keep their current behavior. This extends the bound-method fix in #365 to callable instances and constructors, and updates the previous compatibility assertion that pinned a callable instance's arity to three.

Tests cover both curry directions, positional-only callable instances, regular and inherited constructors, zero/default parameters, explicit arity, collection callbacks, and decorated function signatures. The required contributor entry and a changelog entry are included.

Validation on Windows:

• Before the production change, the selected curry tests had 8 failures and 33 passes. After the change, all 41 passed.
• Python 3.13.5: 3,332 unit tests and doctests passed, with 100% statement coverage.
• Python 3.11.18, using the built wheel: 3,332 unit tests and doctests passed, with 100% statement coverage. Its 17 installed package files match the tested source and wheel.
• Repository-wide Ruff lint/format checks and mypy over src/pydash, tests, and tasks.py passed. Strict Sphinx documentation and sdist/wheel builds passed. The regenerated chaining stub matches the checked-in Git blob after CRLF normalization.
• The unit/doctest runs retain inv test's default exclusion of tests/pytest_mypy_testing. No tracked files changed during the final test runs.

The native inv ci entry point stops because it requests a PTY unsupported on Windows; the corresponding build, documentation, lint, type, generated-stub, and test commands were run individually. Python 3.10/3.12/3.14 and other operating systems were not tested locally.

AI assistance: OpenAI Codex assisted with investigation, implementation, and local verification.

[coveralls]

coverage: 100.0%. remained the same — anticipate218:fix/curry-callable-arity into dgilland:develop