Google Code-in

The output of the CLI (command line / terminal / shell) installer is kind of lame:

...
Creating administrator user account
done
Creating main page with default content
done

We can do much better than that. Like after the final done we could have:

MediaWiki has been successfully installed. You can now
visit <$URL> to view your wiki.
If you have questions, check out our frequently asked questions list:
<https://www.mediawiki.org/wiki/Manual:FAQ> or use one of the
support forums linked on that page.

This should probably be added in maintenance/install.php in MediaWiki core.

You are expected to provide a patch in Wikimedia Gerrit. See https://www.mediawiki.org/wiki/Gerrit/Tutorial for how to set up Git and Gerrit.