Table is not shown properly in GH (#3797)
Table is not shown properly in GH (#3797)

An extra line break is required before the table header.
GH needs it but some markdown viewers don't.
PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs,PolymerLabs/arcs