Include diff file mentions alongside diff discussions
<!--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=555986) </details> <!--IssueSummary end--> It could be useful to have all the mentions of a particular diff included in the diff file itself in a reasonably compact form. This could provide additional important context when someone is referencing a diff outside of a code review process.
issue