Add empty ConcatMaps eliding. Fix eliding so it only elides single arrays.
Add empty ConcatMaps eliding. Fix eliding so it only elides single arrays.

jedesah/Quasar,slamdata/quasar,jedesah/Quasar,quasar-analytics/quasar,drostron/quasar,quasar-analytics/quasar,slamdata/slamengine,drostron/quasar,jedesah/Quasar,drostron/quasar,djspiewak/quasar,slamdata/slamengine,quasar-analytics/quasar,jedesah/Quasar,slamdata/slamengine,drostron/quasar,quasar-analytics/quasar