Add documentation for expansion options of merge request diffs
Add documentation for:
Issue https://gitlab.com/gitlab-org/gitlab-ce/issues/58035
MR https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30927
Edited by Samantha Ming
Add documentation for:
Issue https://gitlab.com/gitlab-org/gitlab-ce/issues/58035
MR https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30927