The last line in main adds a final linefeed to the output.

main的最后一行在输出中加入了一个换行。

For the carriage return and linefeed character combination.

作为回车符和换行符的组合。

Linefeed characters between East Asian characters are removed.

移除东亚字符之间的换行符。

For text-mode files, carriage return–linefeed pairs are counted as single characters.

对文本模式的文件，回车换行作为一个字符。

That linefeed should not be normalized to become a leading space in the subsequent line.

该换行符号不应该正规化为接续下一行的前置空白。