Angular CLI - ng xi18n
Relate the tutorial's legacy xi18n name to current extract-i18n usage.

How it works
Older Angular CLI material may call message extraction ng xi18n. Current CLI documentation uses ng extract-i18n. Check the command offered by the project’s installed version and configure extraction format and output paths deliberately.
Good practice
- Check the local Angular CLI version and run commands from the intended workspace.
- Review angular.json targets and builders before assuming optional commands are configured.
- Use the package manager and lockfile selected by the project.
- Review generated files, configuration changes, and build output before committing or deploying.
Further reading: Tutorialspoint: Angular CLI - ng xi18n · Current Angular CLI reference · Workspace configuration.
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