Add test for grouping at statement level.
Add test for grouping at statement level.

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