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unused_imports/F401: Explain when imports are preserved(#9963)

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unused_imports/F401: Explain when imports are preserved The docs previously mentioned an irrelevant config option, but were missing a link to the relevant `ignore-init-module-imports` config option which _is_ actually used. Additionally, this commit adds a link to the documentation to explain the conventions around a module interface which includes using a redundant import alias to preserve an unused import.
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6 months ago
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by charliermarsh
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