Improve GitLab basics documentation
There are various pages that partly describe Git functionality without linking out to more information on that functionality (like out to the Git docs).
One issue with the section is that it's called GitLab basics, yet is really more like "Managing Git repositories in GitLab" - because GitLab basics would cover more of the broader array of GitLab features.
The create branch page https://docs.gitlab.com/ee/gitlab-basics/create-branch.html is too minimalistic and its link to the terminal page is outdated - it's an old URL that in turn links you to https://docs.gitlab.com/ee/gitlab-basics/start-using-git.html
See also this page as an example which seems more complete.