style: scroll-margin properties shouldn't apply to first-line / first…
…-letter. From https://drafts.csswg.org/css-scroll-snap-1/#placement: > None of the properties in this module apply to the ::first-line and > ::first-letter pseudo-elements. Differential Revision: https://phabricator.services.mozilla.com/D37719
emilio
committed
Jul 23, 2019
