code: function coverFile(srcFile) {
        var srcCode = grunt.file.read(srcFile);
        Instrument = require('coverjs').Instrument;
  
        try {
          return new Instrument(srcCode, {name: srcFile}).instrument();
        } catch (e) {
          grunt.log.error('File ' + srcFile + ' could not be instrumented.');
          grunt.fatal(e, 3);
        }
      }
docs: Instruments the given source file.
  
  @param srcFile
  @return {String} Returns the instrumented source file as a string.