dillon1000/react

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Fix: useOptimistic should return passthrough value when there are no updates pending (#27936)

This fixes a bug that happened when the canonical value passed to
useOptimistic without an accompanying call to setOptimistic. In this
scenario, useOptimistic should pass through the new canonical value.

I had written tests for the more complicated scenario, where a new value
is passed while there are still pending optimistic updates, but not this
simpler one.
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Andrew Clark authored 60a927d04ad3888facebcdf7da620aa1cfc9528f Parent 33068c9
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M packages/react-reconciler/src/ReactFiberHooks.js ModifiedM packages/react-reconciler/src/__tests__/ReactAsyncActions-test.js Modified
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