This task is about MediaWiki's ConfirmAccount extension.
Allow the MediaWiki:Requestaccount-email-body-admin message to include more information:
- Include the user's email address
- Include the real name
- Include information which the user sent in the form
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.