解決git提交：Please enter a commit message to explain why this merge is necessary

　　使用git提交代碼在本次提交時已有其他人提交過代碼，報如下信息：

Please enter a commit message to explain why this merge is necessary,

# especially if it merges an updated upstream into a topic branch.

#

# Lines starting with '#' will be ignored, and an empty message aborts

# the commit.

　　

　　話不多說，直接描述方法：

1. 鍵盤輸入‘i’
2. 鍵盤輸入‘esc’
3. 鍵盤輸入‘:wq’
4. 鍵盤輸入‘enter’，提交代碼成功