Visualization of diff by failing tests where expected vs actual content is available

[mguillem]

I'v discovered the junit-expected-diff-plugin for a few weeks and the idea is so good, that it seems to me that something similar should be built-in directly in the junit-plugin. https://github.com/usultis/junit-expected-diff-plugin

Would a contribution in this direction be accepted here?

[timja]

Yes, looks reasonable