Reverse Path Direction reversed the anchors but left the stroke's width
profile, pressure, tilt, bearing and rotation running the old way, so a
tapered or pressure-drawn stroke changed shape. They now turn with the
path through the blend code's stroke reorientation (the width profile's
sides swap), and the stroke draws as before. A path whose subpaths do
not all turn alike keeps its stroke as it was, as blends do. Arrowheads
stay at the path's start and end.