message: chore: use `this` in `expect.extend` example
diff: import {expect} from '@jest/globals';
  import type {MatcherFunction} from 'expect';
  -const toBeWithinRange: MatcherFunction<[floor: number, ceiling: number]> = (
  - actual: unknown,
  - floor: unknown,
  - ceiling: unknown,
  -) => {
  +const toBeWithinRange: MatcherFunction<[floor: number, ceiling: number]> =
  + function (actual: unknown, floor: unknown, ceiling: unknown) {
  if (
  typeof actual !== 'number' ||
  typeof floor !== 'number' ||
  @@ -25,13 +22,21 @@ const toBeWithinRange: MatcherFunction<[floor: number, ceiling: number]> = (
  if (pass) {
  return {
  message: () =>
  - `expected ${actual} not to be within range ${floor} - ${ceiling}`,
  + `expected ${this.utils.printReceived(
  + actual,
  + )} not to be within range ${this.utils.printExpected(
  + `${floor} - ${ceiling}`,
  + )}`,
  pass: true,
  };
  } else {
  return {
  message: () =>
  - `expected ${actual} to be within range ${floor} - ${ceiling}`,
  + `expected ${this.utils.printReceived(
  + actual,
  + )} to be within range ${this.utils.printExpected(
  + `${floor} - ${ceiling}`,
  + )}`,
  pass: false,
  };
  }
  