Array types are now written with the brackets around the element type问题的解决方法

在xcode6.1中来编写swift空数组时。出现的的这个问题，依照官方 Swift 教程《The Swift Programming Language》来写

let emptyArray = String[]() 时会提示“Array types are now written with the brackets around the element type”错误，正确的写法应该是
let emptyArray = [String]() 其他类型类似来处理就可以