Self-Review Checklist: - [x] I've reviewed my own diff for quality, security, and reliability - [ ] Unsafe blocks (if any) have justifying comments - [x] The content is consistent with the [UI/UX checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist) - [ ] Tests cover the new/changed behavior - [x] Performance impact has been considered and is acceptable Resolves the issues described at https://github.com/pop-os/cosmic-text/releases/tag/0.19.0 This fix addresses the characters '\u{001C}' | '\u{001D}' | '\u{001E}' | '\u{0085}' | '\u{2029}', which can cause the Editor gpui-component to crash, as these characters can cause the 'assert "left == right"'. Release Notes: - N/A