Merge pull request #310 from huangqiaobo/develop

fix some typos

source/chapter1/02_a_swift_tour.md

@@ -682,10 +682,10 @@ protocolValue.simpleDescription
 在尖括号里写一个名字来创建一个泛型函数或者类型。
 
 ```swift
-func repeat<ItemType>(item: ItemType, times: Int) -> ItemType[] {
-    var result = ItemType[]()
-    for i in 0..times {
-        result += item
+func repeat<ItemType>(item: ItemType, times: Int) -> [ItemType] {
+    var result = [ItemType]()
+    for i in 0..<times {
+        result.append(item)
     }
     return result
 }
@@ -707,7 +707,7 @@ possibleInteger = .Some(100)
 在类型名后面使用`where`来指定对类型的需求，比如，限定类型实现某一个协议，限定两个类型是相同的，或者限定某个类必须有一个特定的父类
 
 ```swift
-func anyCommonElements <T, U where T: Sequence, U: Sequence, T.GeneratorType.Element: Equatable, T.GeneratorType.Element == U.GeneratorType.Element> (lhs: T, rhs: U) -> Bool {
+func anyCommonElements <T, U where T: SequenceType, U: SequenceType, T.Generator.Element: Equatable, T.Generator.Element == U.Generator.Element> (lhs: T, rhs: U) -> Bool {
     for lhsItem in lhs {
         for rhsItem in rhs {
             if lhsItem == rhsItem {