Check stdlib/venv with pyrefly

[srittau]

Fixes the following warning when running the pyrefly checks:

WARN Skipping include pattern /home/runner/work/typeshed/typeshed/stdlib/venv/__init__.pyi because it is matched by project-excludes or an ignore file.

[srittau]

This didn't help. pyrefly still issues the warning. @yangdanny97 Do you have any idea how to best fix this?

[AlexWaygood]

Codex says:

---

Add this to pyrefly.toml:

disable-project-excludes-heuristics = true

The existing project-excludes change does not work for two reasons:

1. typeshed passes every stub as an explicit command-line argument, which puts Pyrefly into single-file mode, where project-excludes from configuration files is ignored.
2. Pyrefly automatically appends its default exclusions, including **/venv/**, unless disable-project-excludes-heuristics is enabled.

Unlike project-excludes, disable-project-excludes-heuristics is respected in single-file mode when an explicit configuration file is provided. I tested this with typeshed’s pinned Pyrefly version, 1.3.0.dev1: without the setting, stdlib/venv/__init__.pyi produces the warning and is skipped; with it, the file is checked successfully with 0 errors.

Alternatively, add --disable-project-excludes-heuristics to the Pyrefly command in tests/pyrefly_test.py. The project-excludes addition in the current PR is unnecessary for the existing test invocation.

[srittau]

Warning is gone, thanks!