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[Experiment] Do not widen singletons in hard unions#14347

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mbovel wants to merge 2 commits intoscala:masterscala/scala3:masterfrom

dotty-staging:mb/do-not-widen-hard-unionsdotty-staging/dotty:mb/do-not-widen-hard-unionsCopy head branch name to clipboard

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Commits on Jan 25, 2022

Do not widen hard unions
mbovel
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Update documentation
mbovel
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