https://medium.com/lacolaco-blog/2947f36855aeWed Nov 22 2017 02:06:46 GMT+0900 (JST)
http://www.nyarn.tech/entry/2016/10/03/014916Wed Nov 22 2017 01:34:47 GMT+0900 (JST)GitHub でホワイトスペースを無視 (git diff -w) する方法