fix 2.7 closures
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@ -103,7 +103,7 @@ var reversed = sort(names, backwards)
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```
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reversed = sort(names, { (s1: String, s2: String) -> Bool in
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return s1 > s2
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})
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})
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```
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需要注意的是内联闭包参数和返回值类型声明与`backwards`函数类型声明相同。
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