[stzn/the-swift-programming-language-jp] Pull request opened: #405 [Swiftツアー]whileとrepeat-whileを比較するためのExperimentの追加

[stzn/the-swift-programming-language-jp] Issue opened: #406 複数行文字列の例の更新

[stzn/the-swift-programming-language-jp] Pull request opened: #407 [Swiftツアー]複数行文字列のコード例を更新