Fix bug in part index parsing
Fix bug in part index parsing

peastman/msmbuilder,rafwiewiora/msmbuilder,msmbuilder/msmbuilder,Eigenstate/msmbuilder,msmbuilder/msmbuilder,brookehus/msmbuilder,brookehus/msmbuilder,cxhernandez/msmbuilder,mpharrigan/mixtape,mpharrigan/mixtape,mpharrigan/mixtape,brookehus/msmbuilder,mpharrigan/mixtape,Eigenstate/msmbuilder,mpharrigan/mixtape,msultan/msmbuilder,dr-nate/msmbuilder,msultan/msmbuilder,Eigenstate/msmbuilder,peastman/msmbuilder,cxhernandez/msmbuilder,msultan/msmbuilder,peastman/msmbuilder,brookehus/msmbuilder,cxhernandez/msmbuilder,msmbuilder/msmbuilder,rafwiewiora/msmbuilder,rafwiewiora/msmbuilder,Eigenstate/msmbuilder,peastman/msmbuilder,dr-nate/msmbuilder,rafwiewiora/msmbuilder,cxhernandez/msmbuilder,peastman/msmbuilder,msultan/msmbuilder,cxhernandez/msmbuilder,msultan/msmbuilder,brookehus/msmbuilder,dr-nate/msmbuilder,msmbuilder/msmbuilder,Eigenstate/msmbuilder,dr-nate/msmbuilder,dr-nate/msmbuilder,msmbuilder/msmbuilder,rafwiewiora/msmbuilder