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GitHub User: sientia-rac
Just wanted to point out that I'm working on a gem called "Headhunter" that overtakes Deadweight's functionality and also validates HTML and CSS all in one automagically in your Rails app. For this, it injects itself as middleware into the Rack stack and validates every HTML response that any feature tests triggers.
It would be great to get some feedback, check it out! https://github.com/jmuheim/headhunter