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fix typo (#1190)

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* 校对: chapter2/03_Strings_and_Characters 方法名变化

index(of:) 已更名为: firstIndex(of:)

* Update 03_Strings_and_Characters.md

fix typo
This commit is contained in:
Wentao Liu
2022-06-14 19:54:18 +08:00
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parent 363cec309c
commit a1b4a69db2
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source/02_language_guide/03_Strings_and_Characters.md
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@ -89,7 +89,7 @@ It also ends with a line break.
```swift
let wiseWords = "\"Imagination is more important than knowledge\" - Einstein"
// "Imageination is more important than knowledge" - Enistein
// "Imagination is more important than knowledge" - Einstein
let dollarSign = "\u{24}" // $，Unicode 标量 U+0024
let blackHeart = "\u{2665}" // ♥，Unicode 标量 U+2665
let sparklingHeart = "\u{1F496}" // 💖，Unicode 标量 U+1F496