gistfile1

function stringifyCoverage(_jscoverage) {
  var i, file, fileObj, fileLines;
  var coverageObj = {};
  files = Object.keys(_jscoverage);

  for (i = 0; i < files.length; i++) {
    file = files[i];
    fileObj = _jscoverage[file];
    source = fileObj['source'];
    delete fileObj['source'];
    fileLines = Object.keys(fileObj);
    coverageObj[file] = {
      'lines': fileLines,
      'source': source
    };
  }

  return JSON.stringify(coverageObj);
}