Fix text overflow
What does this MR do?
In side by side diffs, the text will break line in order to be readable.
This is just a fix for side by side MR comments on desktop, it does not fix this view in mobile. See this issue for more information: https://gitlab.com/gitlab-org/gitlab-ce/issues/26003
Screenshots (if relevant)
Does this MR meet the acceptance criteria?
- Changelog entry added
- Documentation created/updated
- API support added
- Added for this feature/bug
- All builds are passing
- Conform by the merge request performance guides
- Conform by the style guides
Branch has no merge conflicts with
master(if it does - rebase it please)
- Squashed related commits together
What are the relevant issue numbers?
Closes #25930 (closed)