Issue #2020081 by Upchuk, BrightBold | johnheaven: Fixed H4 element not distinguishable from rest of text (P element).
Issue #1332068 by Cottser, pixelmord | tim.plunkett: ENGINE_render_template() and ENGINE_extension() are undocumented.
Issue #2346783 by Rok Žlender: Fixed Code block in FilterAlign and FilterCaption not closed properly.