Update explanation about the `extends` feature (!22043) · Merge requests · GitLab.org / GitLab FOSS · GitLab

Ronald van Zon requested to merge update_extends_docs into master Oct 02, 2018

What does this MR do?

Updates the documentation about the use of the extends feature.

What are the relevant issue numbers?

https://gitlab.zendesk.com/agent/tickets/104756 (internal)