Arcs generate with KicadModTree can not be parsed by KLC check_footprint
Arcs in KicadModTree are generally handled by (center start angle)
. However the KLC check_footprints scripts does no longer support this format and fails with an exception as it unconditionally expects arcs to be defined by (start mid end)
.
Therefore the Arcs class needs to be updated to generate the new expected arc description.