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

使用git提交代码在本次提交时已有其他人提交过代码，报如下信息：

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.
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话不多说，直接描述方法：

1. 键盘输入‘i’
2. 键盘输入‘esc’
3. 键盘输入‘:wq’
4. 键盘输入‘enter’，提交代码成功