出现警告信息 Please enter a commit message to explain why this merge is necessary,

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.

如果需要修改

按键盘 i 键进入insert模式

修改上面黄色字体，可以选择不修改

 

如果不需要修改

1. 按esc退出

2. 输入  :wq  (linux操作系统命令，强制性写入文件退出)