Add test for flattening during assembly
Add test for flattening during assembly

pvtodorov/indra,johnbachman/indra,pvtodorov/indra,bgyori/indra,pvtodorov/indra,bgyori/indra,sorgerlab/belpy,johnbachman/belpy,bgyori/indra,johnbachman/belpy,sorgerlab/indra,sorgerlab/indra,johnbachman/belpy,sorgerlab/indra,sorgerlab/belpy,pvtodorov/indra,johnbachman/indra,johnbachman/indra,sorgerlab/belpy