Add test for string format via object
Add test for string format via object

sparkprime/jsonnet,huggsboson/jsonnet,sparkprime/jsonnet,google/jsonnet,sparkprime/jsonnet,tyler-elric/jsonnet,bowlofstew/jsonnet,bowlofstew/jsonnet,habibmasuro/jsonnet,bowlofstew/jsonnet,tyler-elric/jsonnet,google/jsonnet,tyler-elric/jsonnet,sparkprime/jsonnet,darioajr/jsonnet,davidzchen/jsonnet,sparkprime/jsonnet,davidzchen/jsonnet,tyler-elric/jsonnet,bowlofstew/jsonnet,lamuguo/jsonnet,google/jsonnet,jbeda/jsonnet,lamuguo/jsonnet,darioajr/jsonnet,jbeda/jsonnet,huggsboson/jsonnet,Neeke/jsonnet,bowlofstew/jsonnet,habibmasuro/jsonnet,lamuguo/jsonnet,jbeda/jsonnet,darioajr/jsonnet,Neeke/jsonnet,davidzchen/jsonnet,sparkprime/jsonnet,google/jsonnet,lamuguo/jsonnet,google/jsonnet,huggsboson/jsonnet,Neeke/jsonnet,davidzchen/jsonnet,huggsboson/jsonnet,darioajr/jsonnet,google/jsonnet,lamuguo/jsonnet,tyler-elric/jsonnet,Neeke/jsonnet,huggsboson/jsonnet,habibmasuro/jsonnet,Neeke/jsonnet,jbeda/jsonnet,davidzchen/jsonnet,habibmasuro/jsonnet,darioajr/jsonnet,jbeda/jsonnet,habibmasuro/jsonnet