[stzn/the-swift-programming-language-jp] Pull request opened: #537 プロトコルを読んで、ソースが新しくなったところと細かい修正。

[stzn/the-swift-programming-language-jp] Pull request review submitted: #537 プロトコルを読んで、ソースが新しくなったところと細かい修正。

[stzn/the-swift-programming-language-jp] Pull request closed: #537 プロトコルを読んで、ソースが新しくなったところと細かい修正。

[stzn/the-swift-programming-language-jp] Pull request opened: #538 contributors readme action update

[stzn/the-swift-programming-language-jp] Pull request review submitted: #538 contributors readme action update

[stzn/the-swift-programming-language-jp] Pull request closed: #538 contributors readme action update

[stzn/the-swift-programming-language-jp] Pull request opened: #539 contributors readme action update