match: strengthen visit_children_set invariant, Recursive means "all files" My previous interpretation of "Recursive" was too relaxed: I thought it instructed the caller to do something like this: > you can stop calling `visit_children_set` because you'll need to descend into > every directory recursively, but you should still check every file if it > matches or not Whereas the real instruction seems to be: > I guarantee that everything in this subtree matches, you can stop > querying the matcher for all files and dirs altogether. The evidence to support this: - the test actually passes with the stronger invariant, revealing no exceptions from this rule - the implementation of `visit_children_set` for `DifferenceMatcher` clearly relies on this requirement, so it must hold for that not to lead to bugs.

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[build-system]

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requires = ["setuptools", "wheel"]

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[tool.black]

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line-length = 80

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exclude = '''

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build/

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| wheelhouse/

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| dist/

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| packages/

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| \.hg/

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| \.mypy_cache/

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| \.venv/

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| mercurial/thirdparty/

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'''

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skip-string-normalization = true

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quiet = true