https://stackoverflow.com/questions/19085807/please-enter-a-commit-message-to-explain-why-this-merge-is-necessary-especially

https://stackoverflow.com/questions/19085807/please-enter-a-commit-message-to-explain-why-this-merge-is-necessary-especially

1. press "i"
2. write your merge message
3. press "esc"
4. write ":wq"
5. then press enter