Tidy up GenericSpreadsheet#to_matrix
Tidy up GenericSpreadsheet#to_matrix

pk4media/dartroo,airblade/roo,culturecode/roo,roo-rb/roo,SciMed/roo,stevendaniels/roo,OpenGov/roo,RobertRehberg/roo,pricematch/roo-legacy,xchanging-mm4/roo,reshleman/roo,pk4media/dartroo,myplaceonline/roo,enemycnt/roo,SciMed/roo,pabloh/roo,salsify/roo,malept/roo,OpenGov/roo,thotmx/roo,pricematch/roo-legacy,maruware/roo,pricematch/roo-legacy,visagio/roo,OpenGov/roo,fabien-michel/roo