dillon1000/react

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act: Batch updates, even in legacy roots (#21797)

In legacy roots, if an update originates outside of `batchedUpdates`,
check if it's inside an `act` scope; if so, treat it as if it were
batched. This is only necessary in legacy roots because in concurrent
roots, updates are batched by default.

With this change, the Test Utils and Test Renderer versions of `act` are
nothing more than aliases of the isomorphic API (still not exposed, but
will likely be the recommended API that replaces the others).
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Andrew Clark authored a4ecd85e8628d1fdfe77c5615934de40af7d9537 Parent c2c6ea1
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M packages/react-devtools-shared/src/__tests__/inspectedElement-test.js ModifiedM packages/react-dom/src/test-utils/ReactTestUtils.js ModifiedM packages/react-reconciler/src/ReactFiberWorkLoop.new.js ModifiedM packages/react-reconciler/src/ReactFiberWorkLoop.old.js ModifiedM packages/react-reconciler/src/__tests__/ReactIsomorphicAct-test.js ModifiedM packages/react-test-renderer/src/ReactTestRenderer.js ModifiedM packages/react/src/ReactAct.js ModifiedM packages/react/src/ReactCurrentActQueue.js Modified
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