docs: function map(cov) {
    var ret = {
        instrumentation: 'node-jscoverage'
      , sloc: 0
      , hits: 0
      , misses: 0
      , coverage: 0
      , files: []
    };
  
    for (var filename in cov) {
      var data = coverage(filename, cov[filename]);
      ret.files.push(data);
      ret.hits += data.hits;
      ret.misses += data.misses;
      ret.sloc += data.sloc;
    }
  
    ret.files.sort(function(a, b) {
      return a.filename.localeCompare(b.filename);
    });
  
    if (ret.sloc > 0) {
      ret.coverage = (ret.hits / ret.sloc) * 100;
    }
  
    return ret;
  }