When we edit a task, we can receive emails.
Their contents are a mix of the old and the new version of the edited job description.
In the edited task, we can see the change of 2 colors for the old and the new version. This could be useful.
Unfortunately, the email is only in black and white, so it becomes very confusing.
In emails, we can respect the colors or only report the new version or use the popups Navigation way. See this option that you can activate in your preference gadgets:
Navigation Popups: Article previews and editing features appear when you hover over links.
This seems the best way with 2 colors and the old barred version.