Testing and refactor method isOneEditDistance from interviews\leetcode\string\src\main\java

[nguyenhoangvy11]

Hi, I have added testing and refactoring to the isOneEditDistance method using Junit 4. I look forward to contributing to your code

[Hoopeu]

邮件已收到，我会尽快回复。

[Jiruiyang]

来信收到，谢谢，祝您一切顺利！

[lingbaoer]

您好，您的邮件我已收到！祝工作顺利，天天开心。。。

[JR00010]

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