<!--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> - [Work on this issue](https://contributors.gitlab.com/manage-issue?action=work&projectId=278964&issueIid=20735) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=20735) </details> <!--IssueSummary end--> Git 2.15 added support for so-called "zebra" highlighting in diffs. This detects lines that were _moved_ (rather than changed) and highlights them differently. https://git-scm.com/docs/git-diff: >>> zebra Blocks of moved text of at least 20 alphanumeric characters are detected greedily. The detected blocks are painted using either the color.diff.{old,new}Moved color or color.diff.{old,new}MovedAlternative. The change between the two colors indicates that a new block was detected. >>> It'd be great if we could update our diff highlighting to account for this. References: - https://twitter.com/SmileyKeith/status/946554839944724480 - https://twitter.com/SmileyKeith/status/946789768506912773