part 3) Make some sub-tests of <block-string-assignment-to-Element-insertAdjacentHTML.html> less dependent on each other.
Allows to let them pass on Gecko too, given a Gecko-specific bug (see
the test). The text-to-HTML transformation, which is what the test is
supposed to test, is still tested.
Differential Revision: https://phabricator.services.mozilla.com/D219639
bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1913339
gecko-commit: b741269269ef7e92227f0edbf8e5e3ddc4eddbbc
gecko-reviewers: smaug