Oliver Klee

Maybe as another spin-off PR (or prepatch), we can introduce the interface and have one class implement it.

This PR needs a rebase. Apart from that, I think we can move de-abstracting the `RuleSet` class (and creating a dedicated testcase for it by copying some existing tests) into...

> I tried undoing lastest merge, but it's still a mess. I can't even get back to where I was now. Will take some time redoing. In my experience, when...

> If I could somehow reset the branch to the state it was in immediately after the commit "Reorder construction", then squashing may be possible, but I'm not sure how...

> I'm used to Perforce, which does the merge all at once, and also has a visual editor for 3-way merging. I use PhpStorm as my IDE, and IIRC it...

That's very strange (and unfruity) indeed …

Nikita Popov also reported some strange behavior he encountered using fuzzing. We'll want to check those some time (preferably after the 9.0 release - I'd like to do some big...

Thanks! :heart:

Let's update this before we release version 9.0.

We can follow what browsers do: https://developer.mozilla.org/en-US/docs/Web/CSS/@charset