[BZ#777854] Marker angle is incorrect for closepath vertex
Submitted by Federico Mena Quintero
Assigned to @jurf
Link to original bug (#777854)
Description
In the two cases above, the marker at the top-left vertex has an incorrect angle. We are not considering closepath correctly: the incoming and outgoing vectors are specified in
https://www.w3.org/TR/SVG/painting.html#OrientAttribute