lib/cproc.js
function execFile(options, callback) {
  return cmd(_.assign(options, { type:'execFile' } ), _.cb(callback))
}
function execFile(options, callback) {
  return cmd(_.assign(options, { type:'execFile' } ), _.cb(callback))
}
function execFile ( options , callback ) { return cmd ( _ . assign ( options , { type : 'execFile' } ) , _ . cb ( callback ) ) }
child_process.execFile(file[, args][, options][, callback])
child_process . execFile ( file [ args ] [ options ] [ callback ] )