message: docs: move plural function example to external file
  PR Close
diff: @@ -316,13 +316,7 @@ Many locales don't support some of the pluralization categories.
  For example, the default locale (`en-US`) and other locales (such as `es`) have very simple `plural()` functions that don't support the `few` category.
  The following code example displays the [en-US][GithubAngularAngularBlobEcffc3557fe1bff9718c01277498e877ca44588dPackagesCoreSrcI18nLocaleEnTsL15L18] `plural()` function.
  -```typescript
  -function plural(n: number): number {
  - let i = Math.floor(Math.abs(n)), v = n.toString().replace(/^[^.]*\.?/, '').length;
  - if (i === 1 && v === 0) return 1;
  - return 5;
  -}
  -```
  +<code-example path="i18n/doc-files/locale_plural_function.ts" class="no-box" hideCopy></code-example>
  The function will only ever return 1 (`one`) or 5 (`other`).
  The `few` category will never match.
  