<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=34793) </details> <!--IssueSummary end--> [`spec/javascripts/diffs/mock_data/`](https://gitlab.com/gitlab-org/gitlab/tree/fcf798fea44462868015894093b59430652c6427/spec/javascripts/diffs/mock_data) needs to be replaced with dynamically generated mock data.