Break up require/import statements in strings (#18222)

packages/react-reconciler/src/ReactFiberWorkLoop.js

@@ -2937,11 +2937,15 @@ export function warnIfNotScopedWithMatchingAct(fiber: Fiber): void {
  "It looks like you're using the wrong act() around your test interactions.\n" +
  'Be sure to use the matching version of act() corresponding to your renderer:\n\n' +
  '// for react-dom:\n' +
- "import {act} from 'react-dom/test-utils';\n" +
+ // Break up imports to avoid accidentally parsing them as dependencies.
+ 'import {act} fr' +
+ "om 'react-dom/test-utils';\n" +
  '// ...\n' +
  'act(() => ...);\n\n' +
  '// for react-test-renderer:\n' +
- "import TestRenderer from 'react-test-renderer';\n" +
+ // Break up imports to avoid accidentally parsing them as dependencies.
+ 'import TestRenderer fr' +
+ "om react-test-renderer';\n" +
  'const {act} = TestRenderer;\n' +
  '// ...\n' +
  'act(() => ...);' +
@@ -3027,7 +3031,9 @@ export function warnIfUnmockedScheduler(fiber: Fiber) {
  'In Concurrent or Sync modes, the "scheduler" module needs to be mocked ' +
  'to guarantee consistent behaviour across tests and browsers. ' +
  'For example, with jest: \n' +
- "jest.mock('scheduler', () => require('scheduler/unstable_mock'));\n\n" +
+ // Break up requires to avoid accidentally parsing them as dependencies.
+ "jest.mock('scheduler', () => require" +
+ "('scheduler/unstable_mock'));\n\n" +
  'For more info, visit https://fb.me/react-mock-scheduler',
  );
  } else if (warnAboutUnmockedScheduler === true) {
@@ -3036,7 +3042,9 @@ export function warnIfUnmockedScheduler(fiber: Fiber) {
  'Starting from React v17, the "scheduler" module will need to be mocked ' +
  'to guarantee consistent behaviour across tests and browsers. ' +
  'For example, with jest: \n' +
- "jest.mock('scheduler', () => require('scheduler/unstable_mock'));\n\n" +
+ // Break up requires to avoid accidentally parsing them as dependencies.
+ "jest.mock('scheduler', () => require" +
+ "('scheduler/unstable_mock'));\n\n" +
  'For more info, visit https://fb.me/react-mock-scheduler',
  );
  }

packages/shared/ReactLazyComponent.js

@@ -50,7 +50,9 @@ export function initializeLazyComponentType(
  console.error(
  'lazy: Expected the result of a dynamic import() call. ' +
  'Instead received: %s\n\nYour code should look like: \n ' +
- "const MyComponent = lazy(() => import('./MyComponent'))",
+ // Break up imports to avoid accidentally parsing them as dependencies.
+ 'const MyComponent = lazy(() => imp' +
+ "ort('./MyComponent'))",
  moduleObject,
  );
  }