Add scala synthetic subsection
Add scala synthetic subsection

scalameta/scalameta,scalameta/scalameta,scalameta/scalameta,xeno-by/scalameta,olafurpg/scalameta,xeno-by/scalameta,scalameta/scalameta,olafurpg/scalameta,xeno-by/scalameta,olafurpg/scalameta,scalameta/scalameta