Since these are just interpreted comments, there's 0 impact on actual code.
This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are
a few others scattered around which will be removed manually in a second part.
With the big amount of code churn around DOM a lot of tests
broke severely enough that they caused build bustage.
This commit cleans up, removes or otherwise fixes tests
that are broken, no longer relevant or obsolete.
