One fun thing about reimplementing the Web Platform is that you run across all of the spec holes (particularly in much older features, like tables, borders, etc

One fun thing about reimplementing the Web Platform is that you run across all of the spec holes (particularly in much older features, like tables, borders, etc.). Where possible, we're trying to at least determine what current browsers do with the intent of codifying those behaviors in the specifications and W3C cross-browser test suite. That said, if Trident/Edge, Webkit/Blink, and Gecko don't all agree on the implementation of an older feature, we know that it will be a challenge to find middle ground and get things changed and the spec updated to anything more than softer statements using, "MAY."