<!--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=325856) </details> <!--IssueSummary end--> ### Problem to solve When working with markdown (or any type of prose/text in general), the "classic" git-diff (intended for code) is of limited use. ### Proposal With the logic changes introduced in https://gitlab.com/gitlab-org/gitlab/-/issues/16950 and after Gitaly merges support for word-diff (https://gitlab.com/gitlab-org/gitaly/-/merge_requests/3086), we should add a user control to enable word-diff mode.  ##### Commenting while on word-diff mode MVC will not contain the ability to comment while on word-diff mode. This will be addressed in https://gitlab.com/gitlab-org/gitlab/-/issues/330179 ## Prerequisites 1. Word-diff parser - https://gitlab.com/gitlab-org/gitlab/-/merge_requests/55105 1. Word-diff support on gitaly side - https://gitlab.com/gitlab-org/gitlab/-/issues/324805 ### Further info - Word diff parser https://gitlab.com/gitlab-org/gitlab/-/merge_requests/55105 - Gitlab::Diff::Highlight refactor https://gitlab.com/gitlab-org/gitlab/-/issues/323763 - Word-diff Gitaly support https://gitlab.com/gitlab-org/gitaly/-/merge_requests/3086 <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION --> *This page may contain information related to upcoming products, features and functionality. It is important to note that the information presented is for informational purposes only, so please do not rely on the information for purchasing or planning purposes. Just like with all projects, the items mentioned on the page are subject to change or delay, and the development, release, and timing of any products, features, or functionality remain at the sole discretion of GitLab Inc.* <!-- triage-serverless v3 PLEASE DO NOT REMOVE THIS SECTION -->