code: function mochaStandard (done) {
    var standard = require(mochaStandard.module)
  
    var files = this.files || []
    var options = this.options || {}
  
    standard.lintFiles(files, options, function (err, res) {
      if (err) return done(err)
      if (res.errorCount === 0 && res.warningCount === 0) return done()
      done(errorify(res))
    })
  }
docs: /*
  Runs `standard.lintFiles`, and throws meaningful errors if it fails.
  Typically used to plug into mocha's `it()`.